Drilling and positioning tool for main gear of differential mechanism

Abstract

A drilling and positioning tool for a main gear of a differential mechanism comprises a base, an inner hexagon bolt, a height reference block, a workpiece blank, a pull rod, a centering expansion sleeve and a mandrel, the base is of a rectangular structure, a bolt hole is formed in the center of the base, the inner hexagon bolt is installed on the edge of the base, and the height reference block is installed on the height reference block. The height reference block is installed in the center of the base, the central part of the height reference block is provided with the core shaft, the upper part of the core shaft is provided with the centering expansion sleeve, the centering expansion sleeve is provided with the workpiece blank, and the upper part of the workpiece blank is provided with the pull rod; compared with a traditional three-jaw chuck, the three-jaw chuck has the advantages of being long in clamping time, firm in clamping and high in progress.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal mechanical part processing technical field especially relates to a kind of for differential main gear drilling positioning tool. BACKGROUND

[0002] Automobile gearbox differential main reduction gear needs bolt to be fixed on differential housing to prevent its rotation, so differential main reduction gear needs to drill hole processing, traditional clamping needs to use three-jaw chuck, clamping time is longer, positioning accuracy is low, clamping is not firm, and it is prone to larger deviation, which greatly affects production efficiency, and is not conducive to batch continuous production.

[0003] Therefore, in order to improve the firmness of workpiece installation clamping and reduce error, the present design provides a kind of for differential main gear drilling positioning tool. SUMMARY

[0004] The utility model aims at providing a kind of for differential main gear drilling positioning tool.

[0005] A kind of for differential main gear drilling positioning tool, it include: base, inner hexagonal bolt, height reference block, workpiece blank, pull rod, centering expansion sleeve, mandrel, wherein, the base structure is rectangular structure, the bolt hole is provided in the center of the base, the inner hexagonal bolt is installed at the edge of base, the height reference block is installed at the center position of base, the center part of the height reference block is installed with mandrel, the upper portion of the mandrel is installed with centering expansion sleeve, the upper portion of the centering expansion sleeve is installed with workpiece blank, the upper portion of the workpiece blank is installed with pull rod.

[0006] Preferably, the height reference block structure is annular structure, the mandrel structure is tapered structure and upper narrow lower wide.

[0007] Preferably, the centering expansion sleeve structure is ring structure, and the pull rod structure is disc structure and center position is provided with pull rod screw hole, and the lower portion of the pull rod is rod-shaped.

[0008] The beneficial effects of the above-mentioned scheme are:

[0009] 1. The utility model compares the three-jaw chuck used in traditional, with the advantages of clamping time is longer, clamping firm, progress is high. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is structure schematic view of the utility model;

[0011] In the figure: 1, base;2, inner hexagonal bolt;3, height reference block;4, workpiece blank;5, pull rod;6, centering expansion sleeve;7, mandrel. DETAILED DESCRIPTION

[0012] The utility model further clearly and completely illustrates the utility model in combination with the drawings in the specification, but the protection scope of the utility model is not limited to this.

[0013] According to Figure 1 As shown in the figure, a differential main gear drilling positioning tool, comprising: base 1, inner hexagonal bolt 2, height reference block 3, workpiece blank 4, pull rod 5, centering expansion sleeve 6, mandrel 7, wherein the base 1 structure is rectangular structure, the base 1 center is provided with bolt hole, the inner hexagonal bolt 2 is installed at the edge of base, the height reference block 3 is installed at the center position of base 1, the center part of height reference block 3 is installed with mandrel 7, the upper portion of mandrel 7 is installed with centering expansion sleeve 6, the upper portion of centering expansion sleeve 6 is installed with workpiece blank 4, the upper portion of workpiece blank 4 is installed with pull rod 5.

[0014] Specifically, the height reference block 3 structure is annular structure, the mandrel 7 structure is tapered structure and narrow at the top and wide at the bottom.

[0015] Specifically, the centering expansion sleeve 6 structure is annular structure, the pull rod 5 structure is disc structure at the top and is provided with pull rod screw hole at the center position, the lower portion of pull rod 5 is rod-shaped.

[0016] When working, the base 1 is fixed on the numerical control machining center workbench, the height reference block 3, the centering expansion sleeve 6 and the mandrel 7 are assembled on the base 1; the workpiece blank 4 is placed in the centering expansion sleeve 6; the pull rod 5 is placed in the centering expansion sleeve 6, the top of pull rod 5 is provided with a screw hole, the pull rod screw hole is tightened through the pressing screw, the pull rod end surface is pressed tightly to the workpiece end surface, at the same time, the centering expansion sleeve 6 is expanded outward and the workpiece inner hole is expanded tightly. Start the equipment to begin drilling, after all holes are processed, the processed parts are taken out and new workpiece blanks are placed. At this time, the equipment has a cycle movement.

Claims

1. A positioning fixture for drilling holes in the main gear of a differential, comprising: The base (1), hexagon socket head cap screw (2), height reference block (3), workpiece blank (4), tie rod (5), centering expansion sleeve (6), and mandrel (7) are characterized in that the base (1) has a rectangular structure, a bolt hole is provided in the center of the base (1), the hexagon socket head cap screw (2) is installed at the edge of the base, the height reference block (3) is installed in the center of the base (1), the mandrel (7) is installed in the center of the height reference block (3), the centering expansion sleeve (6) is installed on the upper part of the mandrel (7), the workpiece blank (4) is installed on the centering expansion sleeve (6), and the tie rod (5) is installed on the upper part of the workpiece blank (4).

2. The drilling and positioning fixture for the differential main gear as described in claim 1, characterized in that, The height reference block (3) shown has a ring structure, and the spindle (7) has a tapered structure that is narrow at the top and wide at the bottom.

3. The drilling and positioning fixture for the differential main gear as described in claim 1, characterized in that, The centering expansion sleeve (6) has a ring structure, the pull rod (5) has a disc structure at the top and a pull rod screw hole at the center, and the lower part of the pull rod (5) is rod-shaped.

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