Tool clamp for machining convex key of spline shell

Abstract

The utility model discloses a work fixture for processing a convex key of a spline shell, which comprises the spline shell, a fixture body, a stop block, a bolt and a chuck, one end of the fixture body is provided with a mounting shaft, and the mounting shaft is mounted on the chuck; a positioning shaft is arranged at the other end of the clamp body, a threaded hole is formed in the center of the end face of the positioning shaft, a boss is arranged on the end face of the positioning shaft, and the boss is matched with the positioning hole of the spline shell; the stop block is a circular frustum, and a stepped hole is formed in the end face of the large end of the stop block. The first step shaft of the spline shell is arranged on the positioning shaft of the clamp body in a sleeving mode, and the boss of the spline shell is inserted into the positioning hole. The check block is installed in a center hole of the spline shaft end, the outer wall of the check block makes contact with the positioning inclined face of the spline shell, and the bolt penetrates through the stepped hole and then is installed in the threaded hole of the positioning shaft. The clamp is simple in structure, convenient to position, rapid in clamping, capable of effectively preventing the spline shell from rotating in the machining process and particularly suitable for mass production of the spline shell.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixtures, specifically relating to a tooling and fixture for machining the convex key of a spline shell. Background Technology

[0002] The spline housing is an important connecting component. The central hole of the spline housing needs to be filled with liquid. The outside of the spline housing has raised splines with unequal spacing angles between them. In the existing technology, indexing heads are often used for indexing milling. However, in the actual production process, because the spacing angle of each spline is different, operators are very prone to making mistakes during operation, resulting in scrap.

[0003] After improvements, splines are now generally machined using machining centers. However, the outer shell of the spline is relatively thin, making clamping difficult. During the machining process, the spline shell is prone to rotation, affecting the dimensional and positional tolerances. There is an urgent need for a method to solve this problem. Utility Model Content

[0004] To address the problems existing in the background art, this utility model provides a tooling fixture for machining the convex key of a spline shell.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tooling fixture for machining the convex key of a spline housing, comprising a spline housing, a fixture body, a stop block, a bolt, and a chuck. The spline housing has a first stepped shaft at its left end and a spline shaft at its right end. A center hole is located in the center of the spline housing, with a stop plate in the middle of the center hole and a positioning hole at the center of the stop plate. One end of the fixture body has an mounting shaft mounted on the chuck; the other end of the fixture body has a positioning shaft with a threaded hole at its center and a boss on its end face, which matches the positioning hole of the spline housing. The stop block is a circular truncated cone with a stepped hole on its large end face. The first stepped shaft of the spline housing is sleeved on the positioning shaft of the fixture body, and the boss of the spline housing is inserted into the positioning hole. The stop block is installed in the center hole at the end of the spline shaft, with its outer wall contacting the positioning inclined surface of the spline housing. The bolt passes through the stepped hole and is installed in the threaded hole of the positioning shaft.

[0006] The central hole at the end of the first step shaft is adapted to the outer diameter of the positioning shaft.

[0007] The outer diameter of the large end of the stop block is not greater than the bottom diameter at the spline shaft; the outer diameter of the small end of the stop block is smaller than the diameter of the central hole.

[0008] The angle of inclination of the outer wall of the stop is the same as the angle of the positioning slope.

[0009] The beneficial effects of this utility model are as follows: This utility model provides a tooling fixture for machining the convex key of a spline shell. The fixture has a simple structure, convenient positioning, and fast clamping. It can effectively prevent the spline shell from rotating during machining and is particularly suitable for the mass production of spline shells. Attached Figure Description

[0010] Figure 1 This is the front view of the present invention.

[0011] Figure 2 This is a schematic diagram of the splined housing.

[0012] Figure 3 This is a diagram of the internal structure of the spline shell.

[0013] Figure 4 This is a schematic diagram of the clamping device.

[0014] Figure 5 This is a schematic diagram of the stop block.

[0015] In the figure: 1. Splined housing, 2. Clamping body, 3. Stop, 4. Bolt, 5. Chuck, 11. First step shaft, 12. Splined shaft, 13. Center hole, 14. Positioning hole, 15. Positioning bevel, 21. Mounting shaft, 22. Positioning shaft, 23. Boss, 24. Threaded hole, 31. Stepped hole. Detailed Implementation

[0016] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0017] The following detailed description of the specific embodiments of this utility model is provided in conjunction with the accompanying drawings: A tooling fixture for machining the convex key of a spline housing includes a spline housing 1, a fixture body 2, a stop block 3, a bolt 4, and a chuck 5. The spline housing 1 has a first stepped shaft 11 at its left end and a spline shaft 12 at its right end. The spline housing 1 has a center hole 13 at its center, a stop plate at the center of the center hole 13, and a positioning hole 14 at the center of the stop plate. For ease of machining, the center of the positioning hole 14 is a circular hole, and keyways are provided on both sides of the circular hole. One end of the fixture body 2 has an installation shaft 21, which is mounted on the chuck 5. The other end of the fixture body 2 has a positioning shaft 22, a threaded hole 24 at the center of the end face of the positioning shaft 22, and a boss 23 on the end face of the positioning shaft 22, which is adapted to the positioning hole 14 of the spline housing 1. The stop block 3 is a circular cone, and the inclination angle of the outer side wall of the stop block 3 is the same as the angle of the positioning inclined surface 15. The large end face of the stop block 3 is provided with a stepped hole 31; the outer diameter of the large end of the stop block 3 is not greater than the bottom diameter at the spline shaft 12, and the outer diameter of the small end of the stop block 3 is smaller than the diameter of the center hole 13. The purpose of the stop block 3 is to be stuck in the center hole 13 and not to interfere with the tool when machining the spline; the center hole 13 at the end of the first stepped shaft 11 of the spline housing 1 is adapted to the outer diameter of the positioning shaft 22. The first stepped shaft 11 is sleeved on the positioning shaft 22 of the fixture body 2 to prevent the spline housing 1 from tilting during machining and affecting the form and position tolerances; the boss 23 of the spline housing 1 is inserted into the positioning hole 14; the stop block 3 is installed in the center hole 13 at the end of the spline shaft 12, and the outer wall of the stop block 3 is in contact with the positioning inclined surface 15 of the spline housing 1; the bolt 4 passes through the stepped hole 31 and is installed in the threaded hole 24 of the positioning shaft 22; the purpose of the bolt 4 is to connect the spline housing 1, the fixture body 2 and the stop block 3 together to prevent the spline housing 1 from detaching from the fixture body 2 when machining the spline.

[0018] The usage process of this utility model is as follows: First, the mounting shaft 21 of the clamp body 2 is installed on the chuck 5; then the first step shaft 11 of the spline housing 1 is sleeved on the positioning shaft 22 of the clamp body 2, and the stop block 3 is installed in the center hole 13 at the end of the spline shaft 12 and fixed with bolts 4; after installation, the spline at the spline shaft 12 is processed; after processing, the bolts 4 are loosened to remove the spline housing 1, and the unprocessed spline housing 1 is reinstalled for processing, and this process is repeated.

[0019] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0020] The parts of this utility model not described in detail are existing technologies.

Claims

1. A tooling fixture for machining the convex key of a spline housing, comprising a spline housing (1), a fixture body (2), a stop block (3), a bolt (4), and a chuck (5), wherein the left end of the spline housing (1) is provided with a first stepped shaft (11), the right end of the spline housing (1) is provided with a spline shaft (12), the center of the spline housing (1) is provided with a center hole (13), a stop plate is provided in the middle of the center hole (13), and a positioning hole (14) is provided in the center of the stop plate, characterized in that: One end of the clamping body (2) is provided with a mounting shaft (21), which is mounted on the chuck (5); the other end of the clamping body (2) is provided with a positioning shaft (22), the center of the end face of the positioning shaft (22) is provided with a threaded hole (24), and the end face of the positioning shaft (22) is provided with a boss (23), which is adapted to the positioning hole (14) of the spline housing (1); the stop (3) is a circular truncated cone, and the large end face of the stop (3) is provided with a stepped hole (31). The first step shaft (11) of the spline housing (1) is sleeved on the positioning shaft (22) of the clamping body (2), and the boss (23) of the spline housing (1) is inserted into the positioning hole (14); the stop block (3) is installed in the center hole (13) at the end of the spline shaft (12), and the outer wall of the stop block (3) is in contact with the positioning inclined surface (15) of the spline housing (1); the bolt (4) passes through the step hole (31) and is installed in the threaded hole (24) of the positioning shaft (22).

2. The tooling fixture for machining the convex key of a spline housing according to claim 1, characterized in that: The center hole (13) at the end of the first stepped shaft (11) is adapted to the outer diameter of the positioning shaft (22).

3. The tooling fixture for machining the convex key of a spline housing according to claim 1, characterized in that: The outer diameter of the large end of the stop (3) is not greater than the bottom diameter at the spline shaft (12); the outer diameter of the small end of the stop (3) is smaller than the diameter of the central hole (13).

4. The tooling fixture for machining the convex key of a spline housing according to claim 1, characterized in that: The outer wall inclination angle of the stop (3) is the same as the angle of the positioning inclined surface (15).

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