CN104499410A - Telescopic arm amplitude changing device of laser concrete trowelling machine - Google Patents
Telescopic arm amplitude changing device of laser concrete trowelling machine Download PDFInfo
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- CN104499410A CN104499410A CN201410562567.8A CN201410562567A CN104499410A CN 104499410 A CN104499410 A CN 104499410A CN 201410562567 A CN201410562567 A CN 201410562567A CN 104499410 A CN104499410 A CN 104499410A
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- telescopic arm
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- arm
- external extension
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/42—Machines for imparting a smooth finish to freshly-laid paving courses other than by rolling, tamping or vibrating
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F21/00—Implements for finishing work on buildings
- E04F21/20—Implements for finishing work on buildings for laying flooring
- E04F21/24—Implements for finishing work on buildings for laying flooring of masses made in situ, e.g. smoothing tools
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C2301/00—Machine characteristics, parts or accessories not otherwise provided for
- E01C2301/14—Extendable screeds
Abstract
The invention discloses a telescopic arm amplitude changing device of a laser concrete trowelling machine. The device comprises a chain set system, a pushing oil cylinder, an outer telescopic arm, a middle telescopic arm and an inner telescopic arm, wherein the inner telescopic arm is arranged insidethe middle telescopic arm; the middle telescopic arm is arranged inside the outer telescopic arm; the outer telescopic arm is fixed on a frame of the trowelling machine; the pushing oil cylinder is mounted belowthe outer telescopic arm, and acts on the middle telescopic arm; the middle telescopic arm acts on the inner telescopic arm through the chain set system; and the middle telescopic arm and the inner telescopic arm realize synchronous extension movement. The device can realize the larger-distance amplitude change adjustment of the inner telescopic arm through the small movement of the middle telescopic arm; and the front end of the inner telescopic arm is connected with a trowelling mechanism for carrying the trowelling mechanism to a farther spreading construction position. The telescopic arm amplitude changing device has reasonable design and good stability, and is suitable for large-area cement concrete spreading construction.
Description
Technical field
The invention belongs to the technical field of construction equipment of road surface, terrace laying, relate to a kind of semi-girder luffing device, be specifically related to a kind of semi-girder luffing device being arranged on laser concrete troweling machine, the luffing that can realize telescopic arm regulates, and stretches out the distance of trowelling machine vehicle frame for adjusting floating head.
Background technology
Traditional construction technology is first cloth reinforcing bar and track, and draper's concrete, vibrates, carries slurry, floating, health.Vibrate, carry the now widely used mainly three-roller type evener of slurry, this equipment needs to lay a railway track, and the workload of preparation and round-off work is larger; Floating general employing fan leaf type trowelling machine, the coarse and inefficiency of the operation planeness of this equipment.Also have one to be exactly Manual construction, the uniformity that concrete materials paves, planarization and density depend primarily on the skilled of constructor and experience.All there is the shortcomings such as construction precision is inadequate, labor workload is large, production efficiency is low in these two kinds of techniques, is especially not suitable for the laying project of large area cement concrete.
Laser concrete troweling machine (or laser trowelling machine, or laser leveling machine) belong to the higher building machinery of technology content, the concrete construction requirements that area is larger can be met, improve planeness and the density of concrete surface, reduce cost of labor.Laser concrete troweling machine is the laser receiver by floating head is installed, the level height of floating head is regulated according to the signal of laser emitting source, ensure the planeness of the whole scope of operation, be mainly used in the aspect such as indoor terrace construction of the construction of the higher aircraft airfield runway of flatness requirement, grade construction and industrial premises, megastore, freight house.
Laser concrete troweling machine generally comprises walking mechanism, trowelling machine vehicle frame, hydraulic system, laser control system and floating mechanism.In different documents, floating mechanism can be described as again the leveling head or vibration scraper component with identical effect.In the prior art, the existing more effect that patent document discloses multiple laser concrete troweling machine structure composition and obtain.Such as patent CN102094379A discloses a kind of laser concrete leveling machine, patent CN103194954A discloses a kind of laser fabric spreading smoother, patent CN202577998U discloses a kind of four-wheel Full-automatic laser leveler, patent CN202745349U discloses a kind of complete power-actuated laser concrete leveling machine, patent CN103334591A discloses a kind of laser concrete leveling machine, and patent CN103276655A discloses the complete power-actuated laser concrete leveling machine of a kind of drive type.Although above-mentioned these laser leveling machine relative to Manual construction there is larger improvement, improve efficiency of construction and construction quality, but its corresponding floating mechanism is uncontrollable relative to the distance of vehicle frame, namely floating mechanism and vehicle frame need distance concrete materials enough closely just can carry out the construction that paves.Patent CN203412272U discloses a kind of laser concrete screed, there is telescopic arm, the free end of telescopic arm is provided with two scraper plate control arms, telescopic arm can stretch to the front of concrete mix, but this patent does not realize flexible process to the structure of telescopic arm and telescopic arm or principle is described.
Therefore, need to improve prior art, design a kind of novel semi-girder luffing device being applicable to laser concrete troweling machine.
Summary of the invention
The object of the present invention is to provide a kind of novel semi-girder luffing device, overcome the defect of above-mentioned prior art.This semi-girder luffing device is arranged on the vehicle frame of laser concrete troweling machine, has luffing regulatory function, and its front end connects floating mechanism, floating mechanism is delivered to the construction location that distance vehicle frame is far away, is applicable to the laying construction of large area cement concrete.
For achieving the above object, the technical scheme that the present invention takes is:
A kind of semi-girder luffing device of laser concrete troweling machine, comprise chain group system, promote oil cylinder, external extension arm, middle telescopic arm and interior telescopic arm, interior telescopic arm is sleeved in middle telescopic arm, middle telescopic arm is sleeved in external extension arm, external extension arm is fixed on trowelling machine vehicle frame, promote oil cylinder be arranged on the bottom of external extension arm and act on middle telescopic arm, middle telescopic arm acts on interior telescopic arm by chain group system, and middle telescopic arm and interior telescopic arm realize synchronization telescope and move.
Further, in the semi-girder luffing device of described laser concrete troweling machine, chain group system comprises two and forms identical chain group, and two chain groups are arranged in parallel, and each chain group includes the first chain and the second chain; One end of first chain, the second chain is all connected with the front end of external extension arm, and the other end of the first chain, the second chain is all connected with the rear end of interior telescopic arm.
Further, in the semi-girder luffing device of described laser concrete troweling machine, one end of first chain of each chain group is all fixedly connected with by the front end of a chain connector with external extension arm, the other end of the first chain walks around the first sprocket wheel being fixed on middle telescopic arm front end, stretch in the space between the upper wall of interior telescopic arm and the upper wall of middle telescopic arm, the other end of the first chain is fixed on the external surface of interior telescopic arm rear end upper wall; The upper wall of external extension arm front end is fixed in one end of second chain, the other end of the second chain stretches in the space between the upper wall of external extension arm and the upper wall of middle telescopic arm, walk around the second sprocket wheel being fixed on middle telescopic arm rear end, be fixedly connected with by the upper wall of a chain connector with interior telescopic arm.
Further, in the semi-girder luffing device of described laser concrete troweling machine, the inner surface of the left and right sidewall of external extension arm and middle telescopic arm is all each fixes a track, and all tracks are parallel to each other and all arrange along the length direction of external extension arm.
Further, in the semi-girder luffing device of described laser concrete troweling machine, the front end of external extension arm is parallel fixes support roller before two identical middle arms, for telescopic arm in supporting; The front end of middle telescopic arm is parallel fixes support roller before two identical inner arms, for supporting interior telescopic arm; The roller set that on the external surface of the left and right sidewall of middle telescopic arm and interior telescopic arm rear end, each installation one matches with track.
Further, in the semi-girder luffing device of described laser concrete troweling machine, roller set includes support roller and two rear portion lower support wheels on rear portion, rear portion pop-up wheel is positioned at the top of rear portion lower support wheel, two rear portion lower support wheels are arranged side by side along the length direction of track, on rear portion, the upper surface of support roller and track fits, and two rear portion lower support wheels all fit with the soffit of track; On rear portion, support roller is fixedly connected with by the sidewall of bolt with middle telescopic arm or interior telescopic arm rear end, two rear portion lower support wheels are fixedly connected with an equal support plate, a turning cylinder is installed at middle part between two rear portion lower support wheels, and equal support plate is flexibly connected with the sidewall of middle telescopic arm or interior telescopic arm rear end by this turning cylinder.
Preferred as technical scheme, described track is all fixedly connected with by the sidewall of screw with external extension arm, middle telescopic arm, all tracks be all fixed on external extension arm, middle telescopic arm sidewall inner surface center line on.
Preferred as technical scheme, described promotion oil cylinder is hydraulic jack, and the piston rod of hydraulic jack is connected by the lower wall of bearing pin with middle telescopic arm.
Compared with prior art, beneficial effect major embodiment of the present invention is in the following areas:
(1) semi-girder luffing device of the present invention, mainly comprise chain group system, hydraulic jack, external extension arm, middle telescopic arm and interior telescopic arm, interior telescopic arm is socketed in middle telescopic arm, and middle telescopic arm is socketed in external extension arm, and external extension arm is fixed on trowelling machine vehicle frame.External extension arm, middle telescopic arm are organically connected as a whole jib lubbing mechanism with interior telescopic arm by chain group system.Hydraulic jack is arranged on the bottom of external extension arm and acts on middle telescopic arm, middle telescopic arm acts on interior telescopic arm by chain group system, achieve middle telescopic arm and interior telescopic arm synchronization telescope moves, and middle telescopic arm is identical relative to the displacement of middle telescopic arm with interior telescopic arm relative to the displacement of external extension arm, namely the piston rod of hydraulic jack stretches out forward or the S length that bounces back backward, and the absolute displacement of interior telescopic arm is then stretched out forward or the 2S length that bounces back backward.
(2) semi-girder luffing device of the present invention, does not need to change larger hydraulic jack (promotion oil cylinder) and can realize stretching out or bouncing back of the longer distance of interior telescopic arm.Hydraulic jack is fixed on the bottom (hydraulic jack is external) of external extension arm, and external extension arm is fixed on trowelling machine vehicle frame.The center of gravity of hydraulic jack can not move the center of gravity consequently affecting car load forward or backward and change, and is conducive to the balancing the load of telescopic arm.
(3) middle telescopic arm of the present invention and interior telescopic arm stretch out forward along its track respectively or bounce back backward, and in the rear end of middle telescopic arm and interior telescopic arm, two roller set are respectively set, roller set matches with described track, for the balance of telescopic arm in supporting and interior telescopic arm, efficiently avoid the appearance that middle telescopic arm and interior telescopic arm one end tilt situation.
(4) the rear portion lower support wheel of roller set of the present invention has two and is arranged side by side, two rear portion lower support wheels are fixed on equal support plate, a turning cylinder is installed at middle part between two rear portion lower support wheels, and equal support plate is flexibly connected with the sidewall of middle telescopic arm or interior telescopic arm rear end by this turning cylinder.Two rear portion lower support wheels are rotary relative to middle telescopic arm or interior telescopic arm, make the bearing load of two rear portion lower support wheels identical, prevent because unbalance stress causes one of them rear portion lower support wheel to damage.
(5) semi-girder luffing device of the present invention, reasonable in design, good stability, can realize longer-distance concrete laying construction, be applicable to the laying construction of large area cement concrete.
Accompanying drawing explanation
Fig. 1 is the lateral view of the semi-girder luffing device of laser concrete troweling machine.
Fig. 2 is the rear elevation of the luffing device of semi-girder shown in Fig. 1.
Fig. 3 is the lateral view of Fig. 2.
Fig. 4 is the top view of Fig. 2.
Description of reference numerals: 1, external extension arm; 2, middle telescopic arm; 3, interior telescopic arm; 4, oil cylinder is promoted; 5, support roller before middle arm; 6, support roller before inner arm; 7, the first sprocket wheel; 8, support roller on rear portion; 9, rear portion lower support wheel; 10, the second sprocket wheel; 11, track; 12, the first chain; 13, the second chain; 14, chain connector; 15, equal support plate; 16, turning cylinder.
Detailed description of the invention
For the ease of understanding object of the present invention, technical scheme and effect thereof, now will be elaborated further the present invention in conjunction with the embodiments.
The invention provides a kind of semi-girder luffing device of laser concrete troweling machine, its structure as shown in Figure 1, comprises chain group system, promotes oil cylinder 4, external extension arm 1, middle telescopic arm 2 and interior telescopic arm 3.Wherein, the front end of interior telescopic arm 3 connects floating mechanism.Interior telescopic arm 3 is socketed in middle telescopic arm 2, and middle telescopic arm 2 is socketed in external extension arm 1, and external extension arm 1 is fixed on trowelling machine vehicle frame.The cross section of external extension arm 1, middle telescopic arm 2 and interior telescopic arm 3 is square hollow frame structure, and is all horizontally disposed with.Preferred as embodiment, promote oil cylinder 4 and select hydraulic jack, hydraulic jack is fixed on the below of external extension arm 1, becomes to be integrated with trowelling machine vehicle frame with external extension arm 1.The piston rod of hydraulic jack is connected by the lower wall of bearing pin with middle telescopic arm 2 front portion, and hydraulic jack acts on middle telescopic arm 2 by its piston rod, and in realization, telescopic arm 2 stretches out forward or retracting motion backward.External extension arm 1, middle telescopic arm 2 and interior telescopic arm 3 are organically linked together by chain group system, make middle telescopic arm 2 realize synchronization telescope with interior telescopic arm 3 and move, form the structural combination that has luffing function.
Described chain group system is the key component that this semi-girder luffing device has luffing function.As shown in Figure 1, chain group system is formed primarily of two identical chain groups, and two chain groups are arranged in parallel.One end that described chain group includes the first chain 12 and the second chain 13, first chain 12, second chain 13 is all connected with the front end of external extension arm 1, and the other end of the first chain 12, second chain 13 is all connected with the rear end of interior telescopic arm 3.
Specifically, one end of first chain 12 is all fixedly connected with the front end of external extension arm 1 by a chain connector 14, the other end of the first chain 12 walks around the first sprocket wheel 7 being fixed on middle telescopic arm 2 front end, stretch in the space between the upper wall of interior telescopic arm 3 and the upper wall of middle telescopic arm 2, the other end of the first chain 12 is fixed on the external surface of interior telescopic arm 3 rear end upper wall.The upper wall of external extension arm 1 front end is fixed in one end of second chain 13, the other end of the second chain 13 stretches in the space between the upper wall of external extension arm 1 and the upper wall of middle telescopic arm 2, walk around the second sprocket wheel 10 being fixed on middle telescopic arm 2 rear end, be fixedly connected with by the upper wall of a chain connector 14 with interior telescopic arm 3.
In order to make middle telescopic arm 2 and interior telescopic arm 3 stretch out forward reposefully or to bounce back backward, the inner surface of telescopic arm 1 and middle telescopic arm 2 sidewall is outside fixed with track 11.As depicted in figs. 1 and 2, as preferred embodiment, all tracks 11 be all fixed on external extension arm 1, middle telescopic arm 2 sidewall inner surface center line on.In concrete enforcement, respectively on the center line of the inner surface of the left and right sidewall of telescopic arm 1 outside fix a track 11; Respectively on the center line of the inner surface of the left and right sidewall of middle telescopic arm 2 fix a track 11; All tracks 11 are parallel to each other and all arrange along the length direction of external extension arm 1.The transversal of track 11 meets personally Fig. 2, is square soil block cloddy.For ease of track 11 being separately fixed at the inner surface of the sidewall of telescopic arm 1, middle telescopic arm 2 outside, the sidewall of telescopic arm 1, middle telescopic arm 2 outside offers several through holes, and track 11 is fixedly connected with by the sidewall bolt of these through holes with external extension arm 1, middle telescopic arm 2.
In order to support stretch out forward in telescopic arm 2, as shown in Figure 1, the front end of telescopic arm 1 to arrange before two middle arms the identical and parallel front end being fixed on external extension arm 1 lower wall of support roller 5 before support roller 5, two middle arms outside.In order to support stretch out forward in telescopic arm 3, the identical and parallel front end being fixed on middle telescopic arm 2 lower wall of support roller 6 before support roller 6, two inner arms before the front end of middle telescopic arm 2 arranges two inner arms.
When central telescopic arm 2 and interior telescopic arm 3 stretch out forward certain length, especially its front end is connected with telescopic arm 3 in greater weight, and the center of gravity of middle telescopic arm 2 and interior telescopic arm 3 moves forward, and just there is the possibility of tilting the rear end of middle telescopic arm 2 and interior telescopic arm 3.In order to avoid the generation of this situation, each on the external surface of the left and right sidewall of middle telescopic arm 2 and interior telescopic arm 3 rear end a roller set is installed.Described roller set matches with track 11.
As shown in Figure 2, Figure 3 and Figure 4, each roller set forms primarily of support roller on rear portion 8 and two rear portion lower support wheels 9.Wherein, on rear portion, support roller 8 is positioned at the top of rear portion lower support wheel 9, and two rear portion lower support wheels 9 are identical and be disposed side by side on the same surface of an equal support plate 15 along the length direction of track 11.Preferred as embodiment, equal support plate 15 is a fillet rectangle steel plate.Two rear portion lower support wheels 9 are fixed together with equal support plate 15, and leave certain gap between two rear portion lower support wheels 9, a turning cylinder 16 is installed at middle part in this gap.Equal support plate 15 is linked together with the sidewall of middle telescopic arm 2 or interior telescopic arm 3 rear end by this turning cylinder 16, and namely two rear portion lower support wheels 9 and equal support plate 15 can rotate around turning cylinder 16.Two rear portion lower support wheel 9 benefits arranged like this make the bearing load of two rear portion lower support wheels 9 identical, prevents because unbalance stress causes one of them rear portion lower support wheel 9 to damage.
On the rear portion of described roller set, support roller 8 fits with the upper surface of track 11, and two second are rolled 9 and all fit with the soffit of track 11, and namely track 11 passes between support roller 8 and rear portion lower support wheel 9 on rear portion.When central telescopic arm 2 and interior telescopic arm 3 stretch out forward, the rear end of middle telescopic arm 2 and interior telescopic arm 3 applies pressure to its respective rear portion lower support wheel 9, because rear portion lower support wheel 9 is two and around turning cylinder 16, position can occurs to change, homogenizing bearing load, the tilting of the rear end of telescopic arm 2 and interior telescopic arm 3 in stop.In the middle of telescopic arm 2 and interior telescopic arm 3 when bouncing back backward, the rear end of middle telescopic arm 2 and interior telescopic arm 3 applies pressure to support roller 8 on its respective rear portion, and now, applied pressure is relatively little, on a rear portion support roller 8 enough support in telescopic arm 2 or interior telescopic arm 3.
It should be noted that, semi-girder luffing device of the present invention, do not need to change larger hydraulic jack (promoting oil cylinder 4) and stretching out or bouncing back of the longer distance of interior telescopic arm 3 can be realized.Hydraulic jack is fixed on the bottom of external extension arm 1, and namely hydraulic jack is external, and external extension arm 1 is fixed on trowelling machine vehicle frame.The center of gravity of hydraulic jack can not move the center of gravity consequently affecting car load forward or backward and change, and is conducive to the balancing the load of semi-girder luffing device of the present invention.
The principle that semi-girder luffing device of the present invention realizes the adjustment of telescopic arm luffing is: the piston rod of hydraulic jack stretches out forward S length, piston rod directly acts on middle telescopic arm 2, two the first sprocket wheels 7 of middle telescopic arm 2 and front end thereof move forward S length, under the first sprocket wheel 7 promotion forward, first chain 12 drags interior telescopic arm 3 and also moves forward S length, now, the absolute displacement (displacement relative to external extension arm 1) of interior telescopic arm 3 be exactly in telescopic arm 2 relative to external extension arm 1 displacement S and interior telescopic arm 3 relative to middle telescopic arm 2 displacement S add with, be 2S.In like manner, when the piston rod of hydraulic jack bounces back backward, when namely, telescopic arm 2 and interior telescopic arm 3 bounce back backward, the luffing that also can realize telescopic arm regulates.
Further describe invention has been above, but the present invention is not limited to above-mentioned embodiment, in the ken that one skilled in the relevant art possesses, can also make a variety of changes under the prerequisite not departing from present inventive concept in conjunction with the embodiments.
Claims (8)
1. the semi-girder luffing device of a laser concrete troweling machine, it is characterized in that, comprise chain group system, promote oil cylinder, external extension arm, middle telescopic arm and interior telescopic arm, interior telescopic arm is sleeved in middle telescopic arm, middle telescopic arm is sleeved in external extension arm, and external extension arm is fixed on trowelling machine vehicle frame, promotes oil cylinder and is arranged on the bottom of external extension arm and acts on middle telescopic arm, middle telescopic arm acts on interior telescopic arm by chain group system, and middle telescopic arm and interior telescopic arm realize synchronization telescope and move.
2. the semi-girder luffing device of laser concrete troweling machine according to claim 1, is characterized in that, described chain group system comprises two and forms identical chain group, and two chain groups are arranged in parallel, and each chain group includes the first chain and the second chain; One end of first chain, the second chain is all connected with the front end of external extension arm, and the other end of the first chain, the second chain is all connected with the rear end of interior telescopic arm.
3. the semi-girder luffing device of laser concrete troweling machine according to claim 2, it is characterized in that, one end of first chain of described each chain group is all fixedly connected with by the front end of a chain connector with external extension arm, the other end of the first chain walks around the first sprocket wheel being fixed on middle telescopic arm front end, stretch in the space between the upper wall of interior telescopic arm and the upper wall of middle telescopic arm, the other end of the first chain is fixed on the external surface of interior telescopic arm rear end upper wall; The upper wall of external extension arm front end is fixed in one end of second chain, the other end of the second chain stretches in the space between the upper wall of external extension arm and the upper wall of middle telescopic arm, walk around the second sprocket wheel being fixed on middle telescopic arm rear end, be fixedly connected with by the upper wall of a chain connector with interior telescopic arm.
4. the semi-girder luffing device of laser concrete troweling machine according to claim 1, it is characterized in that, the inner surface of the left and right sidewall of described external extension arm and middle telescopic arm is all each fixes a track, and all tracks are parallel to each other and all arrange along the length direction of external extension arm.
5. the semi-girder luffing device of the laser concrete troweling machine according to claim 1 or 4, is characterized in that, the front end of described external extension arm is parallel fixes support roller before two identical middle arms, for telescopic arm in supporting; The front end of middle telescopic arm is parallel fixes support roller before two identical inner arms, for supporting interior telescopic arm; The roller set that on the external surface of the left and right sidewall of middle telescopic arm and interior telescopic arm rear end, each installation one matches with track.
6. the semi-girder luffing device of laser concrete troweling machine according to claim 5, it is characterized in that, described roller set includes support roller and two rear portion lower support wheels on rear portion, rear portion pop-up wheel is positioned at the top of rear portion lower support wheel, two rear portion lower support wheels are arranged side by side along the length direction of track, on rear portion, the upper surface of support roller and track fits, and two rear portion lower support wheels all fit with the soffit of track; On rear portion, support roller is fixedly connected with by the sidewall of bolt with middle telescopic arm or interior telescopic arm rear end, two rear portion lower support wheels are fixedly connected with an equal support plate, a turning cylinder is installed at middle part between two rear portion lower support wheels, and equal support plate is flexibly connected with the sidewall of middle telescopic arm or interior telescopic arm rear end by this turning cylinder.
7. the semi-girder luffing device of laser concrete troweling machine according to claim 4, it is characterized in that, described track is all fixedly connected with by the sidewall of screw with external extension arm, middle telescopic arm, all tracks be all fixed on external extension arm, middle telescopic arm sidewall inner surface center line on.
8. the semi-girder luffing device of laser concrete troweling machine according to claim 1, is characterized in that, described promotion oil cylinder is hydraulic jack, and the piston rod of hydraulic jack is connected by the lower wall of bearing pin with middle telescopic arm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562567.8A CN104499410A (en) | 2014-10-21 | 2014-10-21 | Telescopic arm amplitude changing device of laser concrete trowelling machine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410562567.8A CN104499410A (en) | 2014-10-21 | 2014-10-21 | Telescopic arm amplitude changing device of laser concrete trowelling machine |
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| CN104499410A true CN104499410A (en) | 2015-04-08 |
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| CN201410562567.8A Pending CN104499410A (en) | 2014-10-21 | 2014-10-21 | Telescopic arm amplitude changing device of laser concrete trowelling machine |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4930935A (en) * | 1988-12-29 | 1990-06-05 | David W. Somero | Screeding apparatus and method |
| US5039249A (en) * | 1989-08-18 | 1991-08-13 | Hansen Joel D | Apparatus for screening and trowelling concrete |
| CN201587840U (en) * | 2010-01-25 | 2010-09-22 | 沈阳北方重型机械有限公司 | Built-in four-arm synchronous extension device |
| CN201729641U (en) * | 2010-07-27 | 2011-02-02 | 徐州重型机械有限公司 | Lifting operation vehicle and telescopic arm rack set thereof |
| CN203603006U (en) * | 2013-12-11 | 2014-05-21 | 山东路得威工程机械制造有限公司 | Leveling mechanism of laser concrete spreader |
| CN204151651U (en) * | 2014-10-21 | 2015-02-11 | 西安海迈重工机械有限公司 | A kind of semi-girder luffing device of laser concrete troweling machine |
-
2014
- 2014-10-21 CN CN201410562567.8A patent/CN104499410A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4930935A (en) * | 1988-12-29 | 1990-06-05 | David W. Somero | Screeding apparatus and method |
| US5039249A (en) * | 1989-08-18 | 1991-08-13 | Hansen Joel D | Apparatus for screening and trowelling concrete |
| CN201587840U (en) * | 2010-01-25 | 2010-09-22 | 沈阳北方重型机械有限公司 | Built-in four-arm synchronous extension device |
| CN201729641U (en) * | 2010-07-27 | 2011-02-02 | 徐州重型机械有限公司 | Lifting operation vehicle and telescopic arm rack set thereof |
| CN203603006U (en) * | 2013-12-11 | 2014-05-21 | 山东路得威工程机械制造有限公司 | Leveling mechanism of laser concrete spreader |
| CN204151651U (en) * | 2014-10-21 | 2015-02-11 | 西安海迈重工机械有限公司 | A kind of semi-girder luffing device of laser concrete troweling machine |
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Application publication date: 20150408 |
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