A fixture for gear hobbing

Abstract

This application relates to a clamp for gear hobbing, belonging to the field of gear hobbing technology. It includes a chuck, jaws on the chuck, and a gear blank to be clamped. A circular hole is formed through the center of the gear blank. A clamping structure is provided on the chuck, comprising a mounting plate fixed to the center of the chuck, a flip clamp slidably mounted on the mounting plate, and an upper push block for lifting the flip clamp. A clamping plate is rotatably mounted on the top of the flip clamp. This gear hobbing clamp, through the use of a three-jaw clamp in conjunction with the flip clamp and clamping plate, achieves a method of first determining the center of the gear blank through external centering and then inward clamping. This method is suitable for centering and clamping gear blanks with low roundness. Simultaneously, the clamping of the gear blank is manually adjusted by the push block and threaded rod, making operation convenient and easy to adjust. The addition of a compression pad further improves the contact stability between the push block and the clamping plate, enhancing the practicality of the device.

Description

Technical Field

[0001] This application relates to the field of gear hobbing technology, specifically a fixture for gear hobbing. Background Technology

[0002] Gear hobbing is a highly efficient gear machining method, typically used for mass production of gears. In this method, the gear teeth are formed by rolling a hob or roller on the gear, rather than by cutting.

[0003] Crankshaft gears are mostly thin-walled parts, and it is not easy to ensure the roundness of the inner hole during precision machining of the gear blank. When using conventional shaft core fixtures to position the gear blank, it is difficult to determine the center position of the gear blank for hobbing, which makes hobbing very difficult. To address this issue, a fixture for gear hobbing is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this application provides a fixture for gear hobbing, which has advantages such as the ability to center and clamp gear blanks with low roundness, facilitating quick and accurate location of the center position.

[0005] To achieve the above objectives, this application provides the following technical solution: a clamp for gear hobbing, comprising a chuck, jaws located on the chuck, and a gear blank to be clamped, wherein a circular hole is provided through the middle of the gear blank, and a clamping structure is provided on the chuck.

[0006] The clamping structure includes a mounting plate fixed in the middle of the clamping plate, a flip clamp slidably mounted on the mounting plate, and a push block for lifting the flip clamp. A clamping plate is rotatably mounted on the top of the flip clamp, and a threaded rod is rotatably mounted on the shaft of the mounting plate. A push block for pushing the clamping plate is installed on the external thread of the threaded rod.

[0007] Furthermore, a sliding groove is provided on the surface of the mounting plate for the flip clamp to be movably mounted, and the flip clamp is movably connected relative to the sliding groove.

[0008] Furthermore, a sliding rod is fixedly connected to the bottom end of the flip clamp, and the sliding rod is slidably connected relative to the sliding groove.

[0009] Furthermore, a limiting plate is fixedly installed at the bottom of the slide bar, and the diameter of the limiting plate is larger than the width of the slide groove.

[0010] Furthermore, the length of the end of the clamp facing the center of the mounting plate is greater than the length of the clamp connected to the other end of the flip clamp.

[0011] Furthermore, a guide sleeve is fixedly installed at the bottom of the push block, and a guide rod is fixedly installed at the top of the mounting plate, with the guide sleeve slidably connected to the guide rod.

[0012] Furthermore, a compression pad is also fixedly installed on the top of the push block.

[0013] Furthermore, a hexagonal countersunk hole is formed at the top of the threaded rod.

[0014] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0015] This gear hobbing fixture uses a three-jaw clamp in conjunction with a flip clamp and a clamping plate to first determine the center of the gear blank through external centering and then flip it inward for clamping. This method is suitable for centering and clamping gear blanks with low roundness. At the same time, the clamping of the gear blank is completed manually by setting a push block and a threaded rod, which makes the operation convenient and easy to adjust. The addition of a compression pad can further improve the contact stability of the push block and the clamping plate, thus improving the practicality of the device. Attached Figure Description

[0016] Figure 1 This is a top view of the overall structure of this application;

[0017] Figure 2 This is a schematic diagram of the flip-clamp structure of this application;

[0018] Figure 3 This is a three-dimensional view of the structure of the mounting disk connecting push block in this application.

[0019] In the diagram: 1. Clamping plate; 2. Mounting plate; 3. Clamping jaws; 4. Slide groove; 5. Flip clamp; 51. Slide rod; 52. Limiting plate; 6. Clamping plate; 7. Tooth blank; 8. Round hole; 9. Threaded rod; 10. Push block; 101. Guide sleeve; 102. Guide rod; 103. Extrusion pad; 11. Hexagonal countersunk hole. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] Please see Figures 1 to 3 A clamp for gear hobbing in this embodiment includes a chuck 1, a jaw 3 located on the chuck 1, and a gear blank 7 to be clamped. A circular hole 8 for clamping is provided through the middle of the gear blank 7.

[0022] The jaws 3 and the chuck 1 form a common three-jaw chuck, which is connected by a lathe. Conventional worm gears and worms are used to control the clamping of the jaws 3, thereby achieving external centering clamping of the gear blank 7. This allows the centering position of the gear blank to be determined when the roundness of the inner hole of the gear blank is not high.

[0023] In this embodiment, the clamping plate 1 is provided with a clamping structure for internally clamping the tooth blank. The clamping structure includes a mounting plate 2 fixed in the middle of the clamping plate 1, a flip clamp 5 slidably mounted on the mounting plate 2, and a push block 10 for lifting the flip clamp 5.

[0024] It should be noted that the surface of the mounting plate 2 is provided with a sliding groove 4 for the flip clamp 5 to be movably installed. The flip clamp 5 is movably connected relative to the sliding groove 4, so that it can slide relative to the inner hole of the tooth blank 7 to fit into a close state, in order to adapt to the situation where the roundness of the inner hole of the tooth blank 7 is insufficient.

[0025] Specifically, the bottom end of the flip clamp 5 is fixedly connected to a slide rod 51, which is slidably connected to the slide groove 4. The slide rod 51 allows the flip clamp 5 to slide relative to the mounting plate 2 and adjust its position relative to the shaft of the mounting plate 2.

[0026] In this embodiment, a limiting plate 52 is also fixedly installed at the bottom of the slide bar 51. The diameter of the limiting plate 52 is larger than the width of the slide groove 4. By fitting the limiting plate 52 against the inner top wall of the mounting plate 2, the sliding stability of the flip clamp 5 relative to the mounting plate 2 can be improved.

[0027] In this embodiment, a clamping plate 6 is rotatably mounted on the top of the flip clamp 5. The length of the end of the clamping plate 6 facing the center of the mounting plate 2 is greater than the length of the clamping plate 6 connected to the other end of the flip clamp 5, so that the clamping plate 6 can form a lever to complete the rotational clamping of the tooth blank 7.

[0028] It should be noted that a threaded rod 9 is rotatably mounted on the shaft of the mounting plate 2. A pusher block 10 for pushing the clamping plate 6 is mounted on the external thread of the threaded rod 9. By rotating the threaded rod 9, the pusher block 10 can move relative to the threaded rod 9 under the threaded engagement.

[0029] Preferably, a guide sleeve 101 is fixedly installed at the bottom of the push block 10, and a guide rod 102 is fixedly installed at the top of the mounting plate 2, with the guide sleeve 101 slidably connected to the guide rod 102.

[0030] By sliding relative to the guide rod 102 and the guide sleeve 101, the rotation of the push block 10 relative to the mounting plate 2 can be restricted, thus preventing the push block 10 from rotating.

[0031] In this embodiment, a compression pad 103 is also fixedly installed on the top of the push block 10. The compression pad 103 and the clamping plate 6 are in contact with each other, which can improve the contact stability.

[0032] To facilitate the rotation of the threaded rod 9, a hexagonal countersunk hole 11 is provided at the top of the threaded rod 9 for easy use with a wrench.

[0033] The working principle of the above embodiments is as follows:

[0034] By placing the gear blank 7 on the mounting plate 2 on the chuck 1, and controlling the jaws 3 on the chuck 1 to center and fix the gear blank 7, the threaded rod 9 located at the shaft core of the mounting plate 2 is the center position of the gear blank 7. By pushing the flip clamp 5 located in the circular hole 8 on the gear blank 7 toward the inner wall of the circular hole 8, the flip clamp 5 slides relative to the slide groove 4 through the slide rod 51 at its bottom end, so that the flip clamp 5 can move to fit the inner wall of the circular hole 8. At this time, by using tools such as wrenches and the hexagonal countersunk hole 11 to rotate the threaded rod 9, the threaded rod 9 rotates and engages with the push block 10 through the thread, so that the push block 10 moves upward along the threaded rod 9. The clamping plate 6, which is rotatably connected to the top of the flip clamp 5, is pushed up by the push block 10 and rotates outward, so that one end of the clamping plate 6 expands outward and clamps the outside of the gear blank 7, thereby realizing the clamping of the gear blank 7. At this time, the jaws 3 are removed, so that the gear blank 7 can be exposed for gear hobbing.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for gear hobbing, comprising a chuck (1) and a chuck jaw (3) located on the chuck (1) and a gear blank (7) being clamped, characterized in that: A circular hole (8) is provided through the middle of the tooth blank (7), and a clamping structure is provided on the clamping plate (1); The clamping structure includes a mounting plate (2) fixed in the middle of the clamping plate (1), a flip clamp (5) slidably mounted on the mounting plate (2), and a push block (10) for lifting the flip clamp (5). A clamping plate (6) is rotatably mounted on the top of the flip clamp (5). A threaded rod (9) is rotatably mounted on the shaft of the mounting plate (2). The external thread of the threaded rod (9) is fitted with a push block (10) for pushing the clamping plate (6).

2. A fixture for gear hobbing as defined in claim 1, characterized in that: The mounting plate (2) has a groove (4) on its surface for the movable mounting of the flip clamp (5), and the flip clamp (5) is movably connected relative to the groove (4).

3. A fixture for gear hobbing according to claim 2, characterized in that: The bottom end of the flip clamp (5) is fixedly connected to a slide rod (51), which is slidably connected to the slide groove (4).

4. A fixture for gear hobbing as defined in claim 3, wherein: The bottom of the slide bar (51) is also fixedly installed with a limiting plate (52), the diameter of which is greater than the width of the slide groove (4).

5. A fixture for gear hobbing as defined in claim 1, wherein: The length of the end of the clamp (6) facing the center of the mounting plate (2) is greater than the length of the other end of the clamp (6) connected to the flip clamp (5).

6. A fixture for gear hobbing as defined in claim 1, wherein: The bottom of the push block (10) is fixedly installed with a guide sleeve (101), and the top of the mounting plate (2) is fixedly installed with a guide rod (102). The guide sleeve (101) is slidably connected to the guide rod (102).

7. A fixture for gear hobbing as defined in claim 1, wherein: A compression pad (103) is also fixedly installed on the top of the push block (10).

8. A fixture for gear hobbing according to claim 1, characterized in that: The threaded rod (9) has a hexagonal countersunk hole (11) at its top end.

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