Fixing device for gear shaft machining

Abstract

The fixing device for gear shaft machining comprises a shell, positioning plates are fixedly installed at the two ends of the shell, two sets of symmetrical clamping assemblies are arranged in the shell, each clamping assembly comprises an inner taper sleeve, an elastic clamping sleeve, a worm gear, a worm and a friction gasket, the inner taper sleeve is fixedly installed at an opening of the shell, and the elastic clamping sleeve is fixedly installed at the opening of the shell. The elastic clamping sleeve abuts against the inner side of the inner taper sleeve, external threads are arranged on the outer side of the bottom of the elastic clamping sleeve, the worm is rotationally arranged on the inner side of the shell in a penetrating mode, the worm is meshed with the worm gear, internal threads are arranged on the inner side of the worm gear, and the worm gear is in threaded connection with the inner end of the elastic clamping sleeve. In the rough machining stage of a gear shaft, centering and clamping of a gear shaft forge piece are achieved, the device can adapt to size changes of different forge pieces, center hole machining can be carried out on the two ends of the forge piece at the same time, and the device can serve as a fixing device in the operation of finish machining and key milling.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, and in particular to a fixing device for gear shaft processing. Background Technology

[0002] In the roughing stage of the gear shaft, center holes need to be drilled at both ends of the gear shaft. In subsequent machining, the center holes are mainly used as the reference for positioning and clamping. The common method is to use a three-jaw chuck or elastic sleeve to clamp the part. When using a three-jaw chuck, it is impossible to accurately center the gear shaft, and manual alignment is required, which is complicated. The existing device that uses elastic sleeve to clamp the gear shaft cannot achieve simultaneous machining of both ends of the gear shaft. Utility Model Content

[0003] The present invention aims to address the shortcomings of the prior art by providing a fixing device for gear shaft machining.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a fixing device for gear shaft processing, comprising: a housing, with positioning plates fixedly installed at both ends of the housing, and two symmetrical sets of clamping assemblies provided inside the housing, each clamping assembly including an inner conical sleeve, an elastic sleeve, a worm gear, a worm, and friction washers; an inner conical sleeve fixedly installed at the opening of the housing, the elastic sleeve abutting against the inner side of the inner conical sleeve, the outer surface of the inner end of the elastic sleeve being provided with external threads, the worm rotatably passing through the inner side of the housing, the worm meshing with the worm gear, the inner side of the worm gear being provided with internal threads, the worm gear being respectively sleeved on the inner ends of the two elastic sleeves, the threads on the inner side of the worm gear being screwed to the threads on the outer side of the inner ends of the elastic sleeves, and friction washers being provided between the top and bottom of the worm gear and the inner wall of the housing.

[0005] Furthermore, the clamping assembly also includes a servo motor, which is fixedly mounted on the housing, and the output end of the servo motor is fixedly connected to the worm gear via a coupling.

[0006] Furthermore, the outer shell has a machining hole, the elastic sleeve has a limiting hole, a set screw is fixedly installed in the inner conical sleeve, the head of the set screw is engaged in the limiting hole, and a plug is provided on the outside of the machining hole.

[0007] Furthermore, a spring is provided inside the outer shell, and the two ends of the spring respectively abut against one side of the two sets of elastic sleeves located inside the device.

[0008] Furthermore, the friction washer is made of hardened steel.

[0009] The beneficial effects of this utility model are: in the rough machining stage of the gear shaft, this utility model realizes the centering and clamping of the gear shaft forging, can adapt to the size changes of different forgings, realizes the simultaneous machining of center holes at both ends of the forging, and can also be used as a fixing device in the finishing milling key operation. Attached Figure Description

[0010] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0011] Figure 2 for Figure 1 Sectional view along the middle AA direction;

[0012] Figure 3 This is a schematic diagram of the elastic jacket structure;

[0013] In the diagram: 1-Outer shell; 2-Positioning plate; 3-Inner conical sleeve; 4-Elastic sleeve; 5-Worm gear; 6-Worm; 7-Friction washer; 8-Servo motor; 9-Machined hole; 10-Limiting hole; 11-Setting screw; 12-Plug; 13-Spring;

[0014] The accompanying drawings in this utility model are all schematic diagrams and their sizes do not represent actual dimensions.

[0015] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] like Figures 1-3 As shown, a fixing device for gear shaft machining includes: a housing 1, with positioning plates 2 fixedly installed at both ends of the housing 1; two sets of symmetrical clamping assemblies are provided inside the housing 1; each clamping assembly includes an inner conical sleeve 3, an elastic sleeve 4, a worm gear 5, a worm 6, and friction washers 7; the inner conical sleeve 3 is fixedly installed at the opening of the housing 1; the elastic sleeve 4 abuts against the inner side of the inner conical sleeve 3; the outer surface of the inner end of the elastic sleeve 4 is provided with external threads; the worm 6 rotatably passes through the inner side of the housing 1; the worm 6 meshes with the worm gear 5; the inner side of the worm gear 5 is provided with internal threads; the worm gear 5 is respectively sleeved on the inner ends of the two elastic sleeves 4; the threads on the inner side of the worm gear 5 are screwed to the threads on the outer side of the inner ends of the elastic sleeves 4; and friction washers 7 are provided between the top and bottom of the worm gear 5 and the inner wall of the housing 1. When the part is inserted into the device, the worm 6 rotates, which drives the worm wheel 5 to rotate. The threaded engagement causes the elastic sleeve 4 to move inward into the device. The inner cone sleeve 3 squeezes the elastic sleeve 4 to clamp the part. After processing, the worm 6 rotates in reverse, which drives the worm wheel 5 to rotate in reverse, which drives the elastic sleeve 4 to move outward to release the part.

[0018] The clamping assembly also includes a servo motor 8, which is fixedly mounted on the housing 1. The output end of the servo motor 8 is fixedly connected to the worm gear 6 via a coupling. The servo motor 8 drives the worm gear 6 to rotate.

[0019] The outer shell 1 has a machining hole 9, and the elastic sleeve 4 has a limiting hole 10. A set screw 11 is fixedly installed in the inner conical sleeve 3, and the top of the set screw 11 is engaged in the limiting hole 10. A plug 11 is provided on the outside of the machining hole 9. The set screw 12 is used to lock the limiting hole 10 to prevent the elastic sleeve 4 from rotating, so that the elastic sleeve 4 can only move up and down.

[0020] The outer casing 1 is equipped with a spring 13, the two ends of which abut against the two sets of elastic sleeves 4 located inside the device. The spring 13 assists in the reset of the elastic sleeves 4.

[0021] The friction washer 7 is made of hardened steel. As a vulnerable part, the friction washer 7 uses a material with high wear resistance and hardness, which is generally high-carbon steel or high-alloy steel.

[0022] The method of using this utility model is as follows: Insert the part into the device, and simultaneously turn on the two servo motors 8. The servo motors 8 drive the worm gear 6 to rotate, and the worm gear 6 drives the worm wheel 5 to rotate. The threaded engagement drives the elastic sleeve 4 to move inward to the inside of the device. The inner cone sleeve 3 squeezes the elastic sleeve 4 to clamp the part, thereby achieving centering and clamping of the part. After processing, the worm gear 6 rotates in reverse, which drives the worm wheel 5 to rotate in reverse, and drives the elastic sleeve 4 to move outward to release the part.

[0023] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A fixing device for machining gear shafts, characterized in that, include: The outer shell (1) has positioning plates (2) fixedly installed at both ends. The outer shell (1) has two sets of symmetrical clamping components inside. The clamping components include an inner conical sleeve (3), an elastic sleeve (4), a worm gear (5), a worm (6), and a friction washer (7). The inner conical sleeve (3) is fixedly installed at the opening of the outer shell (1). The elastic sleeve (4) abuts against the inner side of the inner conical sleeve (3). The outer surface of the inner end of the elastic sleeve (4) is provided with an external thread. The worm (6) rotates through the inner side of the outer shell (1). The worm (6) meshes with the worm gear (5). The inner side of the worm gear (5) is provided with an internal thread. The worm gear (5) is respectively sleeved on the inner ends of the two elastic sleeves (4). The thread on the inner side of the worm gear (5) is screwed to the thread on the outer side of the inner end of the elastic sleeve (4). The friction washer (7) is provided between the top and bottom of the worm gear (5) and the inner wall of the outer shell (1).

2. The fixing device for gear shaft machining according to claim 1, characterized in that, The clamping assembly also includes a servo motor (8), which is fixedly mounted on the housing (1). The output end of the servo motor (8) is fixedly connected to the worm gear (6) via a coupling.

3. The fixing device for gear shaft machining according to claim 1, characterized in that, The outer shell (1) has a machining hole (9), the elastic sleeve (4) has a limiting hole (10), the inner cone sleeve (3) has a set screw (11) fixedly installed, the top of the set screw (11) is engaged in the limiting hole (10), and a plug (12) is provided on the outside of the machining hole (9).

4. The fixing device for gear shaft machining according to claim 1, characterized in that, The outer shell (1) is provided with a spring (13), and the two ends of the spring (13) respectively abut against the two sets of elastic sleeves (4) located inside the device.

5. A fixing device for gear shaft machining according to claim 1, characterized in that, The friction washer (7) is made of hardened steel.

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