WO2008009211A1

WO2008009211A1 - A four-function light electric hammer

Info

Publication number: WO2008009211A1
Application number: PCT/CN2007/002104
Authority: WO
Inventors: Wenjiang Wang
Original assignee: Wenjiang Wang
Priority date: 2006-07-11
Filing date: 2007-07-09
Publication date: 2008-01-24
Also published as: CN2920563Y

Abstract

A four-function light electric hammer includes a body, a motor, a cylinder assemble, a big gear (23) and a torque clutch (2), a transmission mechanism, an operation mechanism and a knob (19). Said transmission mechanism includes a small gear (4), a hammering clutch (5), an intermediate shaft (6), a hammering clutch (7), a swing link bearing (8) and a first level gear (9). The small gear (4) is movably fit with the intermediate shaft (6). The small gear (4) meshes with the big gear (23) and matches with the internal teeth of the drilling clutch (5). The drilling clutch (5) and the hammering clutch (7) are movably fit with the intermediate shaft (6). The swing link bearing (8) is movably fit with the intermediate shaft (6) and connects with the cylinder assemble (3). The hammering clutch (7) and the swing link bearing (8) match with each other. The first level gear (9) is closely fit with the intermediate shaft (6).

Description

Light single button four function electric hammer

The invention relates to a power tool, in particular to an electric hammer which realizes four-function conversion of single drill, single hammer, hammer drill and single hammer angle adjustment by single button control. Background technique

With the development of the power tool industry, the requirements for its functions are getting higher and higher. The electric hammer is popular among the users because of its three functions of single drill, single hammer and hammer drill. However, how to realize the function conversion has always been electricity. The hammer is difficult. At present, although the function conversion of the electric hammer can be controlled by a single button, the structure is complicated, the manufacturing cost is high, and the service life is short, which is cumbersome to implement; and in the case of a single hammer, the drill bit cannot be rotated due to the operation of the stopper device. Adjusting the angle of the chisel brings inconvenience to the author.

Summary of the invention

In order to overcome the above disadvantages of the existing electric hammer, the problem to be solved by the present invention is to provide a lightweight single-button four-function electric hammer which is simple and reasonable in structure, flexible in conversion, low in cost, and safe and reliable in use. The technical solution adopted by the present invention to solve the technical problem thereof comprises a body, a motor, a rotating sleeve assembly, a cylinder assembly, a torsion spring, a large gear and a torque clutch, a transmission mechanism, an operating mechanism, a knob, and the transmission mechanism comprises a pinion gear , drill gear clutch, intermediate shaft, hammer gear clutch, pendulum rod bearing and first gear, the pinion gear cooperates with the intermediate shaft, the pinion gear meshes with the large gear and matches the internal teeth of the drill gear clutch, the drill gear clutch and the hammer gear The clutch is in dynamic cooperation with the pinion of the intermediate shaft, the pendulum rod bearing is movably matched with the intermediate shaft and connected to the cylinder assembly through the swing rod, and the hammer clutch and the swing rod bearing are provided with matching concave and convex grooves, the first gear and the intermediate shaft Tight fit.

The operating mechanism includes a stop piece spring, a stop piece, a drill paddle, a hammer paddle, a paddle spring and a connecting rod, a stop piece spring, a stop piece, a drill paddle, a hammer paddle Arranged on the connecting rod in turn, the stopping piece is provided with a stopping tooth piece matched with the large gear and the drilling paddle a positioning plate fastened on one side, the other side of the drill paddle is fastened on the hammer paddle, and the paddle magazine is disposed on the connecting rod between the drill paddle and the hammer paddle, and the drill paddle is arranged on the drill paddle The drill shifting fork is correspondingly disposed on the dial of the drill gear clutch, and the hammer shifting fork on the hammer shifting pad is correspondingly disposed on the dial of the hammer shifting clutch.

In order to make the function conversion accurate, the knob is provided with a semi-circular bump, and the semi-circular bump is provided with an elliptical dial which is offset from the knob core, and the elliptical dial is arranged in the drill dial and the hammer Between the pad fastening regions, the outer edge of the semi-circular bump is placed on the positioning plate of the stopper piece.

In order to prevent load overload operation, the torque clutch is tightly engaged with the rotating sleeve assembly, the large gear is movably coupled with the rotating sleeve assembly, and the torque clutch and the large gear are provided with matching concave and convex grooves.

After adopting the above structure, the knob passes through the cooperation of the semicircular lugs and the elliptical dials with the various states of the stop piece, the drill paddle, and the hammer paddle, and the drill shifting fork drives the drill gear clutch to control the pinion gear and The clutch of the large gear, the hammer shifting fork drives the clutch of the hammer gear and the swing rod bearing, so that the electric hammer can realize the smooth conversion of the four functions of single drill, single hammer, hammer drill and single hammer angle adjustment; The large gear cooperates with the concave-convex groove of the torque clutch to automatically clutch when the load is overloaded during hammer drill or single-drill operation, thereby realizing overload protection; the utility model has the advantages of simple and compact structure, flexible and convenient conversion, low cost and safe and reliable use. DRAWINGS

Figure 1 is a schematic view showing the structure explosion of the present invention.

Figure 2 is a schematic view showing the structure of the hammer drill function of the present invention.

Fig. 3 is a schematic view showing the cooperation of the knob and the operating mechanism when the hammer drill function is the present invention.

Figure 4 is a schematic view showing the cooperation of the large gear, the pinion gear and the tooth piece of the present invention.

Fig. 5 is a structural schematic view of the single hammer angle adjustment function of the present invention.

Fig. 6 is a schematic diagram of the cooperation of the knob and the operating mechanism when the single hammer angle adjustment function of the present invention is shown in Fig. 7. Fig. 7 is a schematic structural view of the single hammer function of the present invention.

Fig. 8 is a schematic view showing the cooperation of the knob and the operating mechanism when the single hammer function is used in the present invention.

Figure 9 is a schematic view showing the structure of the single drill function of the present invention.

FIG. 10 is a schematic view showing the cooperation of the knob and the operating mechanism when the single drill function is used in the present invention.

Figure 11 is a front view of the knob of the present invention. Figure 12 is a right side view of the knob of the present invention.

Figure 13 is a left side view of the knob of the present invention. detailed description

1 to 14 show a specific embodiment of a light single button four-function electric hammer according to the present invention, which comprises a body, a motor, a rotating sleeve assembly 1, a cylinder assembly 3, a torque magazine 24, a large gear 23 and a torque. a clutch 2, a transmission mechanism, an operating mechanism, a knob 19, the transmission mechanism includes a pinion 4, a drill gear clutch 5, an intermediate shaft 6, a hammer clutch 7, a pendulum bearing 8 and a primary gear 9, and the intermediate shaft 6 passes The bearings at both ends are disposed on the body, the pinion 4 is movably engaged with the intermediate shaft 6, the pinion 4 meshes with the large gear 23 and matches the internal teeth of the drill clutch 5, the drill clutch 5 and the hammer clutch 7 and the intermediate shaft 6 The gear shaft is matched, the pendulum rod bearing 8 is movably coupled with the intermediate shaft 6 and connected to the cylinder assembly 3 through the swing rod, and the hammer clutch 7 and the swing rod bearing 8 are provided with matching concave and convex grooves, the first gear 9 and the middle The shaft 6 is tightly fitted, and the motor output shaft is meshed with the primary gear 9.

The operating mechanism includes a stopper spring 10, a stopper piece 11, a drill paddle 13, a hammer paddle 16, a paddle spring 15, and a connecting rod 18, and both ends of the connecting rod 18 are fixed on the body. The moving piece spring 10, the stopping piece 11, the drill paddle 13, and the hammer paddle 16 are sequentially disposed on the connecting rod 18, and the stopping piece 11 is provided with a stopping piece 25 matched with the large gear 23 and the drilling The paddle 13 is a side-fastened positioning plate 12, the other side of the drill paddle 13 is fastened to the hammer paddle 16, and the paddle spring 15 is disposed on the drill paddle 13 and the hammer paddle 16 On the connecting rod 18, the drill shifting fork 14 on the drill dial 13 is correspondingly arranged on the dial of the drill clutch 5, and the hammer shifting fork 17 on the hammer shifting 16 is correspondingly arranged in the hammer clutch 7 On the dial.

The knob 19 is provided with a semicircular protrusion 20, and the semicircular protrusion 20 is provided with an elliptical dial 21 deviated from the knob core, and the elliptical dial 21 is disposed on the drill paddle 13 and the hammer paddle 16 Between the fastening regions, the outer edge of the semicircular projection 20 is placed on the positioning plate 12 of the stop piece 11.

The torque clutch 2 is tightly engaged with the rotating sleeve assembly 1, the large gear 23 is movably engaged with the rotating sleeve assembly 1, and the torque clutch 2 and the large gear 23 are provided with matching concave and convex grooves. When the hammer is excessively loaded when the hammer is drilled or drilled alone, the large gear 23 overcomes the spring force of the torsion spring 24 and then disengages from the engagement of the torsion groove of the torque clutch 2 in a state where the motor is not stopped, the torque clutch 2 Slips with the large gear 23, so that the large gear 23 cannot transmit the rotational force When the rotary sleeve assembly 1 is delivered, the drill stops rotating, thereby achieving the effect of overload protection; when the load is reduced, the hammer resumes normal operation.

The working principle of the four functions of the present invention will be further briefly described below with reference to the accompanying drawings.

The structure of the hammer drill function of the present invention is as shown in Fig. 2 and Fig. 3. At this time, the elliptical dial 21 of the knob 19 is sandwiched between the drill paddle 13 and the hammer paddle 16 in a short distance, and the semicircular projection The outer edge of the round face of 20 is placed on the positioning plate 12 of the stopper piece 11, the tooth piece 25 of the stopper piece 11 is separated from the large gear 23, the pinion gear 4 is meshed with the large gear 23; the drill gear clutch 5 is in the drilling gear Under the action of the drill shifting fork 14 of the paddle 13, the fifth end of the drill gear clutch meshes with the pinion shaft of the intermediate shaft 6, and the other end meshes with the pinion gear 4; the hammer shifter 7 is at the hammer shifting fork of the hammer shifting paddle 16 Under the action of 17, the internal teeth of the hammer clutch 7 mesh with the pinion of the intermediate shaft 6, and the hammer clutch 7 is connected to the pendulum bearing 8 through the mutually matching concave and convex grooves. During operation, the output shaft of the motor drives the first gear 9 to rotate, the first gear 9 drives the intermediate shaft 6 to rotate, and the intermediate shaft 6 drives the rotating sleeve assembly 1 through the drill clutch 5, the pinion 4, the large gear 23 and the torque clutch 2 The rotation force is transmitted; the intermediate shaft 6 simultaneously drives the swing rod bearing 8 to rotate by the hammer clutch 7. The swing rod of the swing rod bearing 8 drives the air assembly 3 to reciprocate, pushing the air hammer of the cylinder assembly 3 to hit the hammer, and completing the impact energy. The transfer, thereby achieving the hammer drill function of the electric hammer.

Figure 5 is a schematic view showing the structure of the single hammer angle adjustment function of the present invention. In the case of stopping, adjust the knob 19 to the single hammer angle adjustment position. As shown in Fig. 6, the positioning plate 12 of the stopper piece 11 is in contact with the semicircular surface of the semicircular projection 20, and the rotation radius of the knob 19 is unchanged. The position of the stopper piece 11 remains unchanged, and the tooth piece 25 of the stopper piece 11 and the large gear 23 are still separated; the radius of rotation of the contact surface of the oval block 21 and the hammer paddle 16 is constant, and the hammer paddle is not changed. 16 remains stationary, the hammer clutch 7 is connected to the pendulum bearing 8 through the matching concave and convex grooves; the radius of rotation of the contact surface of the elliptical dial 21 and the drill paddle 13 changes, and the elliptical dial 21 deviating from the knob core drives The drill paddle 13 is shifted to the right, and the drill gear clutch 5 is moved to the right by the drill shifting fork 14 of the drill paddle 13 and disengages from the pinion 4, the pinion 4, the large gear 23, the torque clutch 2 and The rotating sleeve assembly 1 is in the neutral transmission state, and the rotation of the rotating sleeve assembly 1 can easily adjust the angle of the drill bit, thereby realizing the single hammer angle adjustment function of the electric hammer.

When the knob 19 is rotated to the single hammer function position, its structure is as shown in FIG. 7 and FIG. S, the positioning plate 12 of the stopper piece 11 is in contact with the semicircular projection 20 of the knob 19, and the rotation radius of the knob 19 is the smallest. , the stopper piece 11 is moved right by the elastic force of the stopper piece magazine 10, The tooth piece 25 of the stopper piece 11 meshes with the large gear 23; the radius of rotation of the contact surface of the elliptical dial 21 and the hammer paddle 16 does not change, the hammer paddle 16 remains stationary, and the hammer gear 7 is matched with each other. The concave-convex groove is connected with the pendulum rod bearing 8; at this time, the radius of rotation of the contact surface of the elliptical dial 21 and the drill paddle 13 is the largest, and the elliptical dial 21 deviating from the knob core drives the drill paddle 13 to the right, the drilling file The clutch 5 is moved rightward and completely disengaged from the pinion 4 by the drill shifting fork 14 of the drill paddle 13, and the pinion 4, the large gear 23, the torque clutch 2 and the rotating sleeve assembly 1 are in a neutral transmission state. . During operation, the output shaft of the motor drives the first gear 9 to rotate, and the first gear 9 drives the intermediate shaft 6 to rotate. Since the drill clutch 5 and the pinion 4 are completely separated, the pinion 4 does not transmit the rotational force, the large gear 23, the torque The clutch 2 and the rotating sleeve assembly 1 do not rotate, and the function of the current drilling; the intermediate shaft 6 simultaneously drives the swing rod bearing 8 to rotate by the hammer clutch 7 , and the swing rod of the swing rod bearing 8 drives the cylinder assembly 3 to reciprocate, pushing the cylinder The hammer of the component 3 hits the hammer to complete the transmission of the impact energy, thereby realizing the single hammer drilling function of the electric hammer; the tooth piece 25 of the stopper piece 11 meshes with the large gear 23 to lock the rotation preventing sleeve assembly 1 without rotation, ensuring the hammer The bit angle does not change when hitting.

When the knob 19 is rotated to the single drill function position, the structure is as shown in FIG. 9 and FIG. 10, and the positioning plate 12 of the stopper piece 11 is in contact with the semicircular surface of the knob 19 of the knob 19, and the rotation radius of the knob 19 is the largest. The position of the stopper piece 11 is the same as that of the hammer drill function, the tooth piece 25 of the stopper piece 11 is separated from the large gear 23, the pinion gear 4 meshes with the large gear 23; the elliptical dial block 21 and the hammer paddle 16 The radius of rotation of the contact surface changes, the elliptical dial 21 deviating from the knob core drives the hammer paddle 16 to the left, and the hammer clutch 7 is disengaged from the hammer lever 17 of the hammer paddle 16 to disengage the pendulum bearing 8 The connection of the mutually matching concave and convex grooves causes the pendulum rod bearing 8 to be in a neutral state; at this time, the radius of rotation of the contact surface of the elliptical dial 21 and the drill paddle 13 is the same as that of the hammer drill function, and the drill gear clutch 5 is drilling. Under the action of the drill shifting fork 14 of the shifting paddle 13, the fifth end of the drill gear clutch is engaged with the pinion of the intermediate shaft 6, and the other end is meshed with the pinion gear 4. During operation, the output shaft of the motor drives the first gear 9 to rotate, the first gear 9 drives the intermediate shaft 6 to rotate, the intermediate shaft 6 passes the drill clutch 5 pinion 4, and the pinion 4 rotates through the large gear 23 and the torque clutch 2 The sleeve assembly 1 rotates to complete the transmission of the rotational force; since the hammer clutch 7 and the swing rod bearing 8 are in the clutch state, the swing rod bearing 8 does not rotate, and the cylinder assembly 3 does not reciprocate, so there is no transmission of impact energy, and no hammering is achieved. Function; therefore only achieve the single drill function of the electric hammer.

Claims

1. A light single button four function electric hammer, which comprises a body, a motor, a rotating sleeve assembly (1), a cylinder assembly (3), a torque spring (24), a large gear (23) and a torque clutch (2), and a transmission The mechanism, the operating mechanism and the knob (19) are characterized in that: the transmission mechanism comprises a pinion gear (4), a drill gear clutch (5), an intermediate shaft (6), a hammer gear clutch (7), and a pendulum rod bearing ( 8) and the first gear (9),

Right

The pinion (4) is in dynamic engagement with the intermediate shaft (6), the pinion (4) meshes with the large gear (23) and matches the internal teeth of the drill clutch (5), the drill clutch (5) and the hammer clutch ( 7) Dynamically cooperate with the pinion of the intermediate shaft (6), the pendulum rod bearing (8) is movably fitted with the intermediate shaft (6) and connected to the cylinder assembly (3) through the swing lever, the hammer clutch (7) and the swing lever The bearing (8) is provided with matching concave and convex grooves, and the first gear (9) is tightly fitted with the intermediate shaft (6).

2. The lightweight single-button four-function electric hammer according to claim 1, wherein: said operating mechanism comprises a stop piece spring (10), a stop piece (11 book), and a drill paddle (13) Hammer paddle (16), paddle spring (15) and connecting rod (18), stop spring (10), stop plate (11), drill paddle (13), hammer paddle ( 16) sequentially disposed on the connecting rod (18), the stopping piece (11) is provided with a stopping piece (25) matched with the large gear (23) and a side fastening with the drill paddle (13) The positioning plate (12), the other side of the drill paddle (13) is fastened on the hammer paddle (16), and the paddle spring (15) is arranged on the drill paddle (13) and the hammer paddle ( 16) On the connecting rod (18), the drill shifting fork (14) on the drill dial (13) is correspondingly arranged on the dial of the drill gear clutch (5), on the hammer shifting piece (16) The hammer shift fork (17) is correspondingly disposed on the dial of the hammer clutch (7).

3. The light single button four function electric hammer according to claim 1 or 2, characterized in that: the knob (19) is provided with a semicircular protrusion (20) and a semicircular protrusion (20). ) an elliptical dial (21) offset from the knob, and an elliptical dial (21) disposed between the drill paddle (13) and the hammer paddle (16) fastening region, semi-circular convex The outer edge of the block (20) rests on the positioning plate (12) of the stop piece 11.

4. The lightweight single-button four-function electric hammer according to claim 3, wherein: the torque clutch (2) is tightly engaged with the rotating sleeve assembly (1), and the large gear (23) and the rotating sleeve assembly (1) ) The dynamic clutch, the torque clutch (2) and the large gear (23) are provided with matching concave and convex grooves.