CN103236758A

CN103236758A - Electric drill machine shell provided with assembly type bearing support

Info

Publication number: CN103236758A
Application number: CN201310165327XA
Authority: CN
Inventors: 金捷; 支海波; 徐向红; 田波; 蒋万
Original assignee: ZHANGJIAGANG ZHONGTIAN PRECISION MOLDING CO Ltd; Shazhou Professional Institute of Technology
Current assignee: ZHANGJIAGANG ZHONGTIAN PRECISION MOLDING CO Ltd; Shazhou Professional Institute of Technology
Priority date: 2013-04-18
Filing date: 2013-04-18
Publication date: 2013-08-07

Abstract

The invention relates to an electric drill machine shell provided with an assembly type bearing support; a rear bearing support part of the electric drill machine shell is separately disassembled to form an independent part, namely, the bearing support; the rest parts of the machine shell form an independent part, namely, an outer shell; the bottom of the bearing support is provided with a main locating column, a left auxiliary locating column, a right auxiliary locating column, a left guide hole and a right guide hole; a main locating square hole, a left locating square hole, a right locating square hole, a left guide pin and a right guide pin are respectively arranged in the outer shell at the parts assembled correspondingly to the bearing support; and the bearing support and the outer shell are respectively and separately manufactured and then assembled, so that the final using performance of the product can be realized.

Description

Electric drill casing with assembly type bearing spider

Technical field

The present invention relates to a kind of electric drill casing, particularly have the electric drill casing of assembly type bearing spider.

Background technology

The power ratio of electric drill is bigger, and lasting impact shock is not only arranged during work, and the heating of motor and bearing is also very big.Therefore, the casing of electric drill is answered high temperature resistant usually and is had toughness and rigidity preferably, can satisfy certain fall-down test requirement, and this has relatively high expectations to material property.

Electric drill is in using continuously, and the thermal force that bear in each place of casing is different, and the motor bearings place is the highest.If require the selector shell material according to maximum heat load, though can satisfy the serviceability requirement, product cost is higher; If select conventional common material, then can lose efficacy in advance because bearing high temperature in the bearing spider place of casing, makes the axiality of bearing spider not reach the assembly precision requirement, and vibration and noise strengthen when causing product work, and electric drill can't use when serious.

Summary of the invention

In order to address the above problem, under the prerequisite that does not change electric drill casing general structure, the invention provides the electric drill casing with assembly type bearing spider.

The technical scheme that the present invention takes is: the rear bearing support section in the electric drill casing is split into an individual part separately, i.e. bearing spider, the remainder of casing are formed independently part, i.e. a shell; Bearing spider and shell are made the back assembling respectively separately, to realize the final serviceability of product.It is characterized in that: the bearing spider bottom is provided with main reference column, left redundant reference column, right redundant reference column, left pilot hole and right pilot hole, and the position of corresponding assembling with bearing spider is respectively equipped with master location square hole, location, left side square hole, right square hole, left guide finger and the right guide finger of locating in the shell; Bearing spider adopts the better exotic material PA66+GF30 of rigidity to make, and shell adopts material PP+GF30 to make, and bearing spider and shell can be realized quick assembling by frock.

The invention has the beneficial effects as follows: by changing the partial structurtes design of electric drill casing, bearing spider is wherein split into the individual part design, can adopt exotic material to make, and the remainder of casing changes partial structurtes design back employing drop performance better but the making of the lower cost materials of non-refractory, under the prerequisite that satisfies electric drill casing serviceability, can obviously reduce product cost, increase the benefit.

Description of drawings

Fig. 1 is the shape assumption diagram of bearing spider;

Fig. 2 is the shape assumption diagram of bearing spider bottom;

Fig. 3 is the structure chart of shell;

Fig. 4 is that bearing spider is installed in the structure chart on the shell;

Among the figure: 1. bearing spider, 2. main reference column, 3. left pilot hole, 4. left redundant reference column, 5. right pilot hole, 6. right redundant reference column, 7. right guide finger, 8. right location square hole, 9. main location square hole, 10. left guide finger, location, 11. left side square holes, 12. shells.

Embodiment

The present invention is further described below in conjunction with drawings and Examples.

As shown in Figure 1, 2, adopt the bottom of the bearing spider 1 of exotic material PA66+GF30 making to be provided with main reference column 2, left redundant reference column 4, right redundant reference column 6, left pilot hole 3 and right pilot hole 5.

As shown in Figure 3, be provided with master location square hole 9, location, left side square hole 11, right square hole 8, left guide finger 10 and the right guide finger 7 of locating with the position of bearing spider 1 corresponding assembling in the shell 12 that adopts PP+GF30 to make.

Among the embodiment shown in Fig. 1,2,3,4, earlier the left pilot hole 3 of bearing spider 1 and right pilot hole 5 are aimed at the left guide finger 10 of shell 12 and right guide finger 7 respectively and be inserted in, then main reference column 2, left redundant reference column 4, the right redundant reference column 6 of bearing spider 1 bottom are aimed at insertion with main location square hole 9, location, left side square hole 11, the right location square hole 8 of shell 12 respectively, just can realize the quick assembling of bearing spider and shell simultaneously by frock.

The above is used for explanation the present invention, but is not used for limiting the scope of the invention.Under the prerequisite that does not break away from the technology of the present invention principle, the present invention can also do some modifications and variations, and these modifications and variations also are considered as protection scope of the present invention.

Claims

1. electric drill casing with assembly type bearing spider, comprise bearing spider (1) and shell (12), it is characterized in that: the bottom of described bearing spider (1) is provided with main reference column (2), left redundant reference column (4), right redundant reference column (6), left pilot hole (3) and right pilot hole (5), is provided with master location square hole (9), location, left side square hole (11), right square hole (8), left guide finger (10) and the right guide finger (7) of locating with the position of the corresponding assembling of bearing spider (1) in the described shell (12).

2. electric drill casing according to claim 1 is characterized in that: described bearing spider (1) employing material PA66+GF30 making, shell (12) employing material PP+GF30 making.

3. electric drill casing according to claim 1, it is characterized in that: main reference column (2), left redundant reference column (4), right redundant reference column (6), left pilot hole (3) and the right pilot hole (5) of described bearing spider (1) bottom, successively respectively with described shell (12) in main location square hole (9), location, left side square hole (11), right square hole (8), left guide finger (10) and the right guide finger (7) of locating cooperatively interact.