Differential shell flange plate drilling clamp

Abstract

The utility model discloses a differential shell flange plate drilling clamp which is characterized by comprising a clamp base, a positioning shaft, a supporting seat, a pull rod and an expansion sleeve, the positioning shaft is arranged in the middle of the top face of the clamp base, the supporting seat is arranged on the top face of the clamp base and is coaxial with the positioning shaft, and the pull rod is arranged on the pull rod. The positioning shaft is provided with a movable inner cavity in the axis direction, the pull rod is vertically and movably arranged in the movable cavity, the upper end of the positioning shaft is a conical part, the conical part is sleeved with an expansion sleeve, the upper end of the pull rod is provided with a limiting disc head part, and the side face of the supporting seat is provided with an anti-rotation positioning block which moves horizontally. The device has the advantages of being simple in structure, convenient to clamp, good in machining stability due to the fact that the center and the outer side of the differential mechanism shell are positioned, and suitable for batch drilling machining of the differential mechanism shell.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of fixture, concretely relates to a differential mechanism shell flange plate drilling fixture. BACKGROUND

[0002] The automobile differential mechanism is the mechanism that can make the left and right (or front and rear) drive wheels rotate at different speeds. It is mainly composed of left and right half axle gears, two planetary gears and a gear carrier. Its function is to make the left and right wheels rotate at different speeds when the automobile is driving on a curve or on uneven road surface, that is, to ensure that the two sides of the drive wheels are in pure rolling motion. The differential mechanism is arranged to adjust the speed difference between the left and right wheels. When four-wheel driving, in order to drive four wheels, all the wheels must be connected together. If the four wheels are mechanically connected together, the automobile cannot rotate at the same speed when driving on a curve. In order to make the automobile rotate at the same speed when driving on a curve, a middle differential mechanism is needed to adjust the speed difference between the front and rear wheels.

[0003] The common automobile differential mechanism needs to uniformly process eight holes on the differential mechanism shell in the circumferential direction. The processing precision of these holes is high.

[0004] However, the drilling fixture in the above prior art, although most of them adopt the same one-face two-pin positioning and clamping principle, the differential mechanism shell can also be clamped firmly. However, it is inconvenient to put the differential mechanism shell into the drilling fixture and take it out, and it is very troublesome to use. In mass production, it affects the drilling and processing efficiency of the differential mechanism shell. SUMMARY

[0005] In view of the deficiencies in the above prior art, the utility model provides a differential mechanism shell flange plate drilling fixture, which is simple in structure, convenient to clamp and suitable for hole processing on the differential mechanism shell flange plate.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0007] A differential mechanism shell flange plate drilling fixture, characterized by comprising a fixture base, a positioning shaft, a support seat, a pull rod and an expansion sleeve, wherein the positioning shaft is arranged in the middle of the top surface of the fixture base, the support seat is arranged on the top surface of the fixture base and is coaxially arranged with the positioning shaft, the positioning shaft has a movable inner cavity in the axial direction, the pull rod is vertically movably arranged in the movable inner cavity, the upper end of the positioning shaft is a conical part, the expansion sleeve is sleeved on the conical part, the upper end of the pull rod has a limiting disc head, and the side surface of the support seat is provided with a horizontally movable anti-rotation positioning block.

[0008] Further, the top surface of the support seat has a support ring, and the support ring has a slag discharge groove corresponding to the hole position on the flange plate.

[0009] Furthermore, a cylinder is provided at the bottom of the clamp base, and the piston rod of the cylinder is connected to the lower end of the pull rod to drive the pull rod to move vertically.

[0010] Furthermore, the upper end of the pull rod has an annular groove, and a top block is provided in the annular groove, the top block being used to lift the expansion sleeve.

[0011] Furthermore, the side of the support base has a slag removal hole, and a pad is provided between the inner side of the support base and the positioning shaft.

[0012] The advantages of this utility model include: simple structure, convenient clamping, positioning by the center and outer side of the differential housing, good processing stability, and suitability for batch drilling of differential housings. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of the structure of this utility model;

[0014] Fig. 2 This is a cross-sectional view of the present invention. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0016] One such Figs. 1-2 The differential housing flange drilling fixture shown includes a fixture base 1, a positioning shaft 2, a support base 3, a pull rod 4, and an expansion sleeve 5. The positioning shaft 2 is located in the middle of the top surface of the fixture base 1 and is used to position one half-shaft hole of the differential housing. The support base 3 is located on the top surface of the fixture base 1 and is coaxially arranged with the positioning shaft 2. The top surface of the support base 3 is used to support the flange of the differential housing. The positioning shaft 2 has a movable inner cavity along the axial direction. The pull rod 4 is vertically movable in the movable inner cavity. The upper end of the positioning shaft 2 is a tapered part 21, and the expansion sleeve 5 is fitted on the tapered part 21. The upper end of the pull rod 4 has a limiting disc head 41. When the pull rod 4 moves downward, the expansion sleeve 5 expands and tightens the half-shaft hole at the upper end of the differential housing under the action of the tapered part 21, thereby tightening the differential housing. Before tightening the differential housing, anti-rotation positioning is required on the outside of the differential housing. In this embodiment, the side of the support base 3 is provided with a horizontally movable anti-rotation positioning block 8. After the differential housing is installed in the support base 3, the anti-rotation positioning block 8 is moved horizontally so that the front end of the anti-rotation positioning block 8 is inserted into the groove on the outside of the differential housing.

[0017] The top surface of the support base 3 has a support ring, and the support ring has a slag discharge groove 31 corresponding to the hole position on the flange, so that the drilling process can drill through the hole on the flange in one go. The slag discharge groove 31 can both avoid the drilling tool and allow the work chips to fall off.

[0018] In order to conveniently drive the pull rod 4, the bottom of the clamp base 1 is provided with a pneumatic cylinder 9, the piston rod of the pneumatic cylinder 9 is connected with the lower end of the pull rod 4, and the pneumatic cylinder 9 is used to drive the vertical movement of the pull rod 4.

[0019] In order to conveniently shrink and relax the expansion sleeve 5, the upper end of the pull rod 4 is provided with a ring groove, a top block 10 is arranged in the ring groove, the top block 10 is used to lift the expansion sleeve 5, and the expansion sleeve 7 is automatically shrunk when the expansion sleeve 7 is lifted, so that the differential housing can be relaxed.

[0020] In order to conveniently clean the cutting slag falling in the support base 3, the side of the support base 3 is provided with a slag cleaning hole, and the inner side of the support base 3 is provided with a gasket 11 between the support base 3 and the positioning shaft 2, and the gasket 11 is used to fill the gap.

[0021] The technical scheme provided by the utility model is described in detail above, and the principle and implementation mode of the utility model are described by applying specific examples; the above description of the embodiments is only applicable to helping understand the principle of the utility model; meanwhile, for the general technical personnel in the field, the specific implementation mode and application range of the utility model will be changed, and the content of the specification should not be understood as the limitation of the utility model.

Claims

1. A differential case flange drilling jig characterized by: Including the fixture base (1), the positioning shaft (2), the support seat (3), the pull rod (4), the expansion sleeve (5), wherein the positioning shaft (2) is set in the top surface middle part of the fixture base (1), the support seat (3) is set in the top surface of the fixture base (1), and with the positioning shaft (2) coaxial arrangement, the positioning shaft (2) has the movable inner cavity along the axial direction, the pull rod (4) is vertically movable and is set in the movable inner cavity, the upper end of the positioning shaft (2) is the tapered portion (21), the tapered portion (21) is set with the expansion sleeve (5), the upper end of the pull rod (4) has the limit disc head (41), the side surface of the support seat (3) is provided with the horizontal movable anti-rotation positioning block (8).

2. A differential case flange drilling jig according to claim 1, wherein: The top surface of the support seat (3) has a support ring, and the support ring has a deslagging groove (31) corresponding to the hole position on the flange plate.

3. A differential case flange drilling jig according to claim 1, wherein: The bottom of the fixture base (1) is provided with a pneumatic cylinder (9), and the piston rod of the pneumatic cylinder (9) is connected with the lower end of the pull rod (4), so as to drive the vertical movement of the pull rod (4).

4. A differential case flange drilling jig according to claim 1, wherein: The upper end of the pull rod (4) has a ring groove, and a top block (10) is arranged in the ring groove, and the top block (10) is used to lift the expansion sleeve (5).

5. A differential case flange drilling jig according to claim 1, wherein: The side surface of the support seat (3) has a deslagging hole, and a spacer (11) is arranged between the inner side of the support seat (3) and the positioning shaft (2).

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