A gear hobbing clamp for clamping synchronizer gears

Abstract

This utility model discloses a gear hobbing fixture for clamping synchronizer gears, including a fixture body. A bracket is fixedly connected to the bottom inner side of the fixture body, and a fixed plate is fixedly connected to the top of the bracket. A motor is fixedly connected to the inner end of the bracket, and a screw is rotatably connected inside the fixed plate. The output end of the motor is connected to the screw through a coupling. This device drives the screw to raise and lower the screw sleeve through the motor. With the linkage of four symmetrically distributed connecting rods and the movable frame, the four clamping plates move radially synchronously. This integrated transmission design ensures the uniform distribution of clamping force and avoids workpiece displacement caused by single-point force. Combined with the dual guide structure of slide rail and slide groove, the clamping stability is greatly improved, the clamping time is significantly shortened, and the machining accuracy is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of gear processing technology, and in particular to a gear hobbing fixture for clamping synchronizer gears. Background Technology

[0002] Synchronizer gears are key components in automotive transmissions, used to achieve smooth gear engagement during shifting. Their core is the synchronizer ring (synchronizer sleeve), which synchronizes the gear and shaft speeds through friction, reducing shifting shock. The working principle is as follows: during shifting, the synchronizer ring first contacts the target gear, using the friction of its conical surface to generate resistance, forcing both gears to rotate at the same speed, and then the sleeve smoothly engages. Synchronizer gears significantly improve shifting smoothness, protect transmission gears, and prevent grinding noise, and are widely used in manual transmissions and some automatic transmission vehicles. They are mostly made of high-strength alloy steel, requiring a balance between wear resistance and heat dissipation, making them an important design element for ensuring transmission durability and driving comfort. Therefore, fixtures are needed when machining them.

[0003] Existing synchronizer gear hobbing fixtures have the following main drawbacks: Traditional fixtures mostly rely on manual adjustment or single-point drive, making it difficult to achieve synchronous and precise displacement of multiple jaws during clamping, which can easily lead to uneven force on the gear's inner hole, resulting in clamping deformation or positioning deviation; the clamping surfaces usually use rigid contact or fixed rubber pads, which cannot be easily replaced after long-term wear, and lack an effective overload protection mechanism, which can easily damage the gear's precision-machined surface or the fixture structure when the clamping force is too large; in addition, manual operation is cumbersome, clamping efficiency is low, and it is difficult to meet the needs of mass production. Utility Model Content

[0004] The purpose of this utility model is to provide a gear hobbing fixture for clamping synchronizer gears, which solves the problem that traditional fixtures in the prior art mostly rely on manual adjustment or single-point drive, making it difficult to achieve synchronous and accurate displacement of multiple jaws during clamping, and easily causing uneven force on the inner hole of the gear, resulting in clamping deformation or positioning deviation.

[0005] To achieve the above objectives, a gear hobbing fixture for clamping synchronizer gears is provided, comprising a fixture body, a bracket fixedly connected to the bottom inner side of the fixture body, a fixed plate fixedly connected to the top of the bracket, a motor fixedly connected to the inner end of the bracket, a screw rotatably connected inside the fixed plate, and the output end of the motor connected to the screw via a coupling.

[0006] The screw is threaded with a threaded sleeve, and the four outer ends of the threaded sleeve are rotatably connected to connecting rods. The four outer ends of the fixed plate are fixedly connected to extension plates.

[0007] According to the aforementioned gear hobbing fixture for clamping synchronizer gears, a movable frame is fixedly connected to the top of the second slider, and a connecting frame is fixedly connected to the top of the movable frame.

[0008] According to the aforementioned gear hobbing fixture for clamping synchronizer gears, the outer ends of the extension plate are fixedly connected to slide rails, and the slider is slidably connected to the slide rails.

[0009] According to the aforementioned gear hobbing fixture for clamping synchronizer gears, the fixture body has four sliding grooves at its upper end, a sliding rod is fixedly connected inside the sliding groove, and a slider is fixedly connected to the top of the connecting frame, the slider being slidably connected to the sliding rod.

[0010] According to the aforementioned gear hobbing fixture for clamping synchronizer gears, a clamping plate is fixedly connected to the top of the connecting frame, and a rubber block is correspondingly installed at the outer end of the clamping plate.

[0011] According to the aforementioned gear hobbing fixture for clamping synchronizer gears, a gear hobbing body is correspondingly provided at the outer end of the rubber block, a limiting groove is provided at the outer end of the clamping plate, a limiting block is fixedly connected to the end of the rubber block near the clamping plate, and a positioning bolt is engaged with the internal thread of the limiting groove in the limiting block.

[0012] The above-mentioned solution has the following beneficial effects:

[0013] 1. This device uses a motor to drive the screw to raise and lower the screw sleeve. In conjunction with four sets of symmetrically distributed connecting rods and the movable frame, it achieves synchronous radial movement of the four clamping plates. This integrated transmission design ensures uniform distribution of clamping force and avoids workpiece displacement caused by single-point force. Combined with the dual guide structure of slide rail and slide groove, it greatly improves clamping stability, significantly shortens clamping time, and ensures machining accuracy.

[0014] 2. The outer end of the clamping plate can be detachably installed with polyurethane rubber blocks via limiting grooves and bolts. It has both wear-resistant and anti-slip properties as well as elastic buffering characteristics. The modular design supports quick replacement of wear parts and is suitable for workpieces of different specifications. The rubber blocks make flexible contact with the inner ring of the gear, which not only avoids scratching the precision machined surface, but also intelligently controls the clamping force through the overcurrent protection function to prevent overload damage to the workpiece or equipment, thereby improving clamping safety and adaptability.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

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

[0017] Figure 1 This is a schematic diagram of the overall structure of a gear hobbing fixture for clamping synchronizer gears according to the present invention.

[0018] Figure 2This is a front view of the clamping assembly of a gear hobbing clamp for clamping synchronizer gears according to the present invention.

[0019] Figure 3 This is a top view of the clamping assembly of a gear hobbing clamp for clamping synchronizer gears according to the present invention.

[0020] Figure 4 This is a schematic diagram of the installation of a rubber block in a gear hobbing clamp for mounting synchronizer gears according to the present invention.

[0021] Legend:

[0022] 1. Fixture body; 2. Slide rod; 3. Rubber block; 4. Slide block one; 5. Gear hobbing body; 6. Clamping plate; 7. Slide groove one; 8. Connecting frame; 9. Movable frame; 10. Connecting rod; 11. Fixed plate; 12. Motor; 13. Bracket; 14. Extension plate; 15. Screw; 16. Screw sleeve; 17. Slide block two; 18. Slide rail; 19. Slide groove two; 20. Limiting groove; 21. Positioning bolt; 22. Limiting block. Detailed Implementation

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] Reference Figure 1-4 This utility model provides a gear hobbing fixture for clamping synchronizer gears, comprising a fixture body 1, a bracket 13 fixedly connected to the bottom inner side of the fixture body 1, a fixed plate 11 fixedly connected to the top of the bracket 13, a motor 12 fixedly connected to the inner end of the bracket 13, a screw 15 rotatably connected inside the fixed plate 11, and the output end of the motor 12 connected to the screw 15 via a coupling. Starting the motor 12 ensures the rotation of the screw 15.

[0025] The screw 15 is threaded with a screw sleeve 16. The four outer ends of the screw sleeve 16 are rotatably connected to a connecting rod 10. The four outer ends of the fixed plate 11 are fixedly connected to an extension plate 14. The other end of the connecting rod 10 is rotatably connected to the inner end of the movable frame 9. Under the action of the connecting rod 10, the screw sleeve 16 can be restricted. Under the action of the threaded engagement, the screw sleeve 16 can move up and down. The movement of the four movable frames 9 can be realized by adjusting the lifting of the screw sleeve 16.

[0026] The extension plate 14 has a second sliding groove 19 inside, and a second slider 17 is slidably connected inside the second sliding groove 19. A movable frame 9 is fixedly connected to the top of the second slider 17, and a connecting frame 8 is fixedly connected to the top of the movable frame 9. The two outer ends of the extension plate 14 are fixedly connected to slide rails 18, and the second slider 17 is slidably connected to the slide rails 18. By setting the slide rails 18 and the second sliding groove 19, the stability of the second slider 17 and the movable frame 9 during movement can be improved, which greatly improves the clamping effect of the entire clamping assembly.

[0027] The clamp body 1 has four grooves 7 at its top. A slide rod 2 is fixedly connected inside the groove 7. A slider 4 is fixedly connected to the top of the connecting frame 8. The slider 4 is slidably connected to the slide rod 2. A clamping plate 6 is fixedly connected to the top of the connecting frame 8. A rubber block 3 is installed on the outer end of the clamping plate 6. By setting the slider 4, the clamping plate 6 can be connected to the movable frame 9, so that the internal moving component can drive the clamping plate 6 to move and complete the clamping operation. Secondly, the slide rod 2 can improve the movement stability of the clamping component. Finally, the rubber block 3 at the outer end has deformation capability and anti-slip capability, which can better contact the inner ring of the gear hobbing body 5 and improve the clamping effect.

[0028] The outer end of the rubber block 3 is provided with a gear body 5, and the outer end of the clamping plate 6 is provided with a limiting groove 20. The end of the rubber block 3 near the clamping plate 6 is fixedly connected to a limiting block 22. The limiting block 22 and the internal thread of the limiting groove 20 are fitted with a positioning bolt 21. By setting the limiting block 22 and the limiting groove 20, it is convenient for the staff to disassemble and replace the rubber block 3, improving the convenience of the device. Secondly, under the action of the positioning bolt 21, the two can be locked and fixed, improving the stability of the rubber block 3 during use. The other end of the positioning bolt 21 is locked with a nut. The motor 12 drive circuit integrates an overcurrent protection function. When the clamping resistance increases and the motor current increases significantly, the power is automatically cut off or reversed. The rubber block 3 is made of polyurethane rubber, which has excellent wear resistance and anti-slip properties. The positioning bolt 21 is a high-strength bolt (such as grade 8.8 or above) and is equipped with an effective anti-loosening device, such as a spring washer + flat washer.

[0029] Working principle: When in use, the gear hobbing body 5 is placed inside the clamping body 1. Then, the internal motor 12 is started to drive the screw 15 to rotate. Under the action of the threaded engagement, the screw sleeve 16 can gradually move downward. And under the transmission action of the four sets of connecting rods 10 at the outer end, the four sets of movable frames 9 can gradually move outward. Through the connection between the connecting frame 8 and the slider 4, the four clamping plates 6 can be driven to move outward synchronously. Finally, the rubber block 3 at the outer end of the clamping plate 6 contacts the inner wall of the gear hobbing body 5, completing the rapid clamping of the gear hobbing body 5 and improving the stability of the gear hobbing body 5 during processing.

[0030] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A hobbing fixture for clamping a synchronizer gear, comprising a fixture body (1), characterized in that, A bracket (13) is fixedly connected to the bottom inner side of the clamp body (1), a fixed plate (11) is fixedly connected to the top of the bracket (13), a motor (12) is fixedly connected to the inner end of the bracket (13), a screw (15) is rotatably connected inside the fixed plate (11), and the output end of the motor (12) is connected to the screw (15) through a coupling. The screw (15) is threaded with a threaded sleeve (16), and the four outer ends of the threaded sleeve (16) are rotatably connected to a connecting rod (10). The four outer ends of the fixed plate (11) are fixedly connected to an extension plate (14).

2. A hobbing fixture for clamping a synchronizer gear as set forth in claim 1, wherein The extension plate (14) has a second sliding groove (19) inside, and a second slider (17) is slidably connected inside the second sliding groove (19).

3. A hobbing fixture for clamping a synchronizer gear as set forth in claim 2, wherein The top of the second slider (17) is fixedly connected to a movable frame (9), and the top of the movable frame (9) is fixedly connected to a connecting frame (8).

4. A hobbing fixture for clamping a synchronizer ring gear as set forth in claim 2, wherein, The outer ends of the extension plate (14) are fixedly connected to slide rails (18), and the second slider (17) is slidably connected to the slide rails (18).

5. A hobbing fixture for clamping a synchronizer gear as set forth in claim 3, wherein The clamp body (1) has four sliding grooves (7) at its top. A sliding rod (2) is fixedly connected inside the sliding groove (7). A slider (4) is fixedly connected to the top of the connecting frame (8). The slider (4) is slidably connected to the sliding rod (2).

6. A hobbing fixture for clamping a synchronizer ring gear as set forth in claim 3, wherein The top of the connecting frame (8) is fixedly connected to a clamping plate (6), and a rubber block (3) is installed on the outer end of the clamping plate (6).

7. A gear hobbing fixture for clamping synchronizer gears according to claim 6, characterized in that, The outer end of the rubber block (3) is provided with a gear hobbing body (5), and the outer end of the clamping plate (6) is provided with a limiting groove (20). The end of the rubber block (3) near the clamping plate (6) is fixedly connected to a limiting block (22), and the limiting block (22) and the internal thread of the limiting groove (20) are fitted with a positioning bolt (21).

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