Input shaft hobbing clamp

Abstract

The utility model discloses an input shaft gear hobbing clamp which is characterized by comprising a gear hobbing seat and a pull rod, the gear hobbing seat is provided with a guide shaft section, a positioning shaft section and an installation shaft section, the gear hobbing seat is provided with a central shaft hole, the pull rod is arranged in the central shaft hole in a sliding mode, and the central shaft hole section corresponding to the guide shaft section is a conical hole section. The pull rod is provided with an inverted conical shaft section matched with the conical hole section, a plurality of square holes are annularly distributed in the side wall of the conical hole section, jacking blocks are arranged in the square holes in a sliding mode, when the inverted conical shaft section of the pull rod extrudes the inner side faces of the jacking blocks, the jacking blocks move in the radial direction relative to the gear hobbing base, and the outer side end faces of the jacking blocks protrude out of the circumferential face of the guide shaft section. The gear hobbing fixture has the advantages that the gear hobbing fixture is simple in structure, convenient to clamp and position and high in positioning precision, and gear hobbing efficiency of the input shaft can be improved.

Description

Technical Field

[0001] This utility model relates to the field of machining fixtures, specifically to an input shaft gear hobbing fixture. Background Technology

[0002] In the field of mechanical transmission, the input shaft, as the core component for power transmission, directly affects the meshing efficiency, noise level, and service life of the transmission system due to the precision of its tooth profile machining. As the mainstream machining method for involute gears, gear hobbing requires high-precision fixtures for radial positioning and axial clamping of the input shaft to ensure that the tooth profile tolerances meet the requirements of ISO 1328 standard.

[0003] Traditional mechanical clamping fixtures use a single conical or end face positioning structure, which is difficult to adapt to input shafts with different diameters, and the fixture structure is complex and the positioning accuracy is not high. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the present invention provides an input shaft hobbing fixture, which has a simple structure and can accurately position the shaft hole at one end of the input shaft.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gear hobbing fixture for an input shaft, characterized in that it comprises a gear hobbing seat and a pull rod. The gear hobbing seat has a guide shaft section, a positioning shaft section, and a mounting shaft section. The gear hobbing seat has a central shaft hole. The pull rod is slidably disposed within the central shaft hole. The central shaft hole section corresponding to the guide shaft section is a tapered hole section. The pull rod has an inverted tapered shaft section that mates with the tapered hole section. Multiple square holes are annularly distributed on the sidewall of the tapered hole section. A pressing block is slidably disposed within each square hole. The inner end face of the pressing block is a tapered arc surface adapted to the tapered hole section. The outer end face of the pressing block is an arc surface adapted to the outer circumferential surface of the guide shaft section. When the inverted tapered shaft section of the pull rod presses against the inner side of the pressing block, the pressing block moves radially relative to the gear hobbing seat. The outer end face of the pressing block protrudes beyond the circumferential surface of the guide shaft section. The upper part of the guide shaft section has an annular groove. A flattened steel wire retaining ring is disposed within the annular groove to limit the upper part of the pressing block.

[0007] Furthermore, the positioning shaft segment is tapered at 60°.

[0008] Furthermore, the lower end of the mounting shaft section has a mounting flange, on which multiple mounting holes are evenly distributed.

[0009] Furthermore, a set screw is provided on the mounting shaft section, and a limiting groove is provided on the pull rod to cooperate with the set screw to achieve axial limiting.

[0010] The advantages of this utility model include: simple fixture structure, convenient clamping and positioning, high positioning accuracy, which helps to improve the gear hobbing efficiency of the input shaft. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a schematic diagram of an embodiment of the present invention. Detailed Implementation

[0013] The present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0014] One such Figure 1-2 The input shaft hobbing fixture shown includes a hobbing seat 2 and a pull rod 1. The hobbing seat 2 has a guide shaft section 2a, a positioning shaft section 2b, and a mounting shaft section 2c connected in sequence. The positioning shaft section 2b is tapered at 60°, and this tapered surface is used to position the end of the shaft hole of the input shaft for axial positioning. The hobbing seat 2 has a central shaft hole 5, and the pull rod 1 is slidably disposed in the central shaft hole 5. The section of the central shaft hole 5 corresponding to the guide shaft section 2a is a tapered hole section 6. The pull rod 1 has an inverted tapered shaft section 7 that mates with the tapered hole section 6. Four square holes are evenly distributed in a ring on the side wall of the tapered hole section 6, and a top pressure block 8 is slidably disposed in the square holes. The inner end face of the top pressure block 8 is a tapered arc surface adapted to the tapered hole section 6, and the outer end face of the top pressure block 8 is an arc surface adapted to the outer peripheral surface of the guide shaft section 2a. The lower end of the pull rod 1 is connected to a drive cylinder. When the pull rod 1 moves downward, its inverted conical shaft section 7 presses against the inner side of the top pressure block 8. The top pressure block 8 moves radially relative to the gear hobbing seat 2. The outer end face of the top pressure block 8 protrudes from the circumferential surface of the guide shaft section 2a, thereby tightening the inner hole of the top pressure input shaft. In order to allow the top pressure block 8 to automatically retract after the pull rod 1 moves upward and exits the pressing state, the upper part of the guide shaft section 2a in this embodiment has an annular groove. A flattened steel wire retaining ring 3 is provided in the annular groove to limit the upper part of the top pressure block 8. The elastic force of the flattened steel wire retaining ring 3 presses the top pressure block 8 back into the direction hole.

[0015] To facilitate the installation of the fixture on the machine tool, the lower end of the mounting shaft section 2c has a mounting flange with multiple mounting holes evenly distributed on the mounting flange.

[0016] To limit the axial travel of the tie rod 1, a set screw 4 is provided on the mounting shaft section 2c, and the tie rod 1 has a limiting groove 9 that cooperates with the set screw 4 to achieve axial limiting.

[0017] The technical solutions provided by the embodiments of this utility model have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of this utility model. The description of the above embodiments is only for helping to understand the principles of the embodiments of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An input shaft hobbing fixture, characterized by: The application relates to a rolling gear seat (2) and a pull rod (1), the rolling gear seat (2) has a guide shaft section (2a), a positioning shaft section (2b) and a mounting shaft section (2c), the rolling gear seat (2) has a central shaft hole (5), the pull rod (1) is slidably arranged in the central shaft hole (5), the guide shaft section (2a) corresponds to a tapered hole section (6) of the central shaft hole (5), the pull rod (1) has an inverted tapered shaft section (7) matched with the tapered hole section (6), a plurality of square holes are annularly arranged on the side wall of the tapered hole section (6), a top pressing block (8) is slidably arranged in the square hole, the inner side end surface of the top pressing block (8) is a tapered arc surface matched with the tapered hole section (6), the outer side end surface of the top pressing block (8) is a circular arc surface matched with the outer circumferential surface of the guide shaft section (2a), when the inverted tapered shaft section (7) of the pull rod (1) extrudes the inner side surface of the top pressing block (8), the top pressing block (8) moves radially relative to the rolling gear seat (2), the outer side end surface of the top pressing block (8) protrudes from the circumferential surface of the guide shaft section (2a), the upper portion of the guide shaft section (2a) is provided with an annular groove, and a flattened steel wire retainer ring (3) limiting the upper portion of the top pressing block (8) is arranged in the annular groove.

2. An input shaft hobbing fixture according to claim 1, wherein: The positioning shaft section (2b) is tapered at an angle of 60 degrees.

3. An input shaft hobbing fixture as defined in claim 1 wherein: The lower end of the mounting shaft section (2c) is provided with a mounting flange, and a plurality of mounting holes are uniformly arranged on the mounting flange.

4. An input shaft hobbing fixture as defined in claim 1 wherein: The mounting shaft section (2c) is provided with a clamping screw (4), and the pull rod (1) is provided with a limiting groove (9) matched with the clamping screw (4) to realize axial limiting.

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