Clutch hub machining clamp

Abstract

The utility model relates to a kind of clamps for clutch gear hub processing, it includes fixed sleeve, inner hole expansion assembly and flexible compensation component, inner hole expansion assembly is driven shaft in sleeve by air cylinder drive and makes axial motion, linear motion is converted into the radial expansion of push plate by the cooperation of connecting block and long groove, wherein the limit post of push plate bottom moves along waist type slot trajectory, and accurate radial positioning is realized by cooperating limit sheet, 8 annular array push plate synchronous action, the arc-shaped elastic member set in its outer wall can be self-adapting gear hub inner hole profile, form uniform inner expansion force, realize gas pressure distribution by high-pressure gas source input, flexible air bag is self-adapting adjustment by chamber pressure when contacting workpiece, complete dynamic compensation to outer wall size tolerance and deformation, two groups of components are formed independent rotating pair by bearing and fixed sleeve, while realizing two-way clamping, guarantee processing stability, effectively inhibit workpiece deformation and improve clamping accuracy.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts fixtures, and in particular to a fixture for machining clutch gear hubs. Background Technology

[0002] As a core component of the power transmission system, the machining accuracy of the clutch hub's internal spline hole, external tooth profile, and end face directly affects the smoothness of gearbox shifting and the reliability of transmission. The clutch hub is usually a thin-walled barrel-shaped structure with a wall thickness of 1.5-3mm. The coaxiality requirement between the internal spline hole and the external tooth profile is ≤0.03mm. The clutch hub is characterized by its thin wall thickness, which makes it prone to deformation during machining. Deformation can cause the coaxiality of the internal spline hole and the external tooth profile, the perpendicularity of the end face, and other dimensional and positional tolerances to exceed the design requirements, directly affecting the assembly accuracy between the hub and the gearbox shaft, and causing axial movement or radial runout of the transmission system. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a fixture for machining clutch gear hubs.

[0004] The present invention provides a clamping fixture for machining clutch gear hubs, which adopts the following technical solution:

[0005] A clamping fixture for machining clutch gear hubs includes a fixed sleeve, an inner hole tensioning assembly, and a flexible compensation assembly. The inner hole tensioning assembly is rotatably connected inside the fixed sleeve, and the flexible compensation assembly is rotatably connected outside the fixed sleeve. The inner hole tensioning assembly includes a cylinder, a connecting frame, a sleeve, a drive shaft, a connecting member, and a push plate. The connecting frame has discs at its top and bottom. The cylinder is fixed to the bottom disc of the connecting frame, and its output end is connected to the drive shaft. The sleeve is coaxially mounted on the top disc of the connecting frame. The drive shaft passes sequentially through the top disc of the connecting frame. The component consists of a circular disc and a sleeve. The sleeve has several long grooves on its sidewall. The outer wall of the drive shaft has several connecting blocks corresponding to each long groove. The connecting blocks pass through the corresponding long grooves, and there are two connecting blocks spaced apart in each set of long grooves. The end of each connecting block is hinged to one end of the connector, and the other end of each connector is hinged to the push plate. The bottom of the push plate is provided with a limiting post. The top disc of the connecting frame has several waist-shaped grooves arranged in a circular array along the axis. The limiting post passes through the waist-shaped grooves, and a limiting piece is provided at one end of the limiting post that passes through the waist-shaped groove.

[0006] Optionally, the flexible compensation component includes a connecting ring, a connecting arm, an outer ring, an annular inflation chamber, and several elastic airbags. The outer ring is fixed to the outside of the connecting ring by the connecting arm. An annular groove is formed on the inner wall of the outer ring. The annular inflation chamber is disposed in the annular groove. The elastic airbags communicate with the annular inflation chamber. An inflation port is formed at the bottom of the outer ring. The annular inflation chamber is connected to an external high-pressure air source through the inflation port.

[0007] Optionally, the number of the elongated groove, the waist-shaped groove, and the push plate is set to at least eight.

[0008] Optionally, the outer wall of the push plate is provided with an elastic element.

[0009] Optionally, the outer wall of the elastic element is configured to be arc-shaped.

[0010] Optionally, both the inner hole tensioning assembly and the flexible compensation assembly achieve relative rotation with the fixed sleeve via bearings.

[0011] In summary, this utility model has at least one of the following beneficial technical effects:

[0012] 1. The cylinder drives the drive shaft to move vertically inside the sleeve. Two connecting blocks are spaced apart in each set of long slots. The linear motion of the drive shaft is converted into the radial expansion of the push plate through the hinged connector. The limiting post at the bottom of the push plate is embedded in the waist-shaped groove of the top disc of the connecting frame. The limiting plate constrains its movement trajectory, ensuring that the push plate can only move along the preset radial path. The inner core is tightened, thereby achieving clamping of the inner hole of the clutch hub.

[0013] 2. The annular inflation chamber acts as a pressure buffer center, uniformly distributing gas to the circumferentially distributed independent elastic airbag chambers. When there are dimensional tolerances or slight deformations in the gear hub, the elastic airbags achieve local compensation through the pressure adaptive mechanism of the independent chambers. The airbag chambers corresponding to areas with higher contact pressure experience increased contact reaction force, resulting in increased internal air pressure due to chamber volume compression. The pressure rebalancing between adjacent chambers is achieved through the air passage system, ultimately forming a uniformly distributed radial clamping force.

[0014] 3. The number of push plates is set to at least 8, and the number of long grooves and waist-shaped grooves is also set to at least 8. The outer wall of the push plate is provided with elastic elements, which can be elastic materials such as rubber. The outer wall of the elastic elements is set to be arc-shaped to better fit the inner hole of the workpiece. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a fixture for machining clutch gear hubs.

[0016] Figure 2 This is a schematic diagram illustrating the structure of the internal hole tensioning component.

[0017] Figure 3 It is a cross-sectional view used to illustrate the structure of the internal hole tensioning component.

[0018] Figure 4 This is a schematic diagram illustrating the structure of the annular air cavity and the elastic airbag.

[0019] Explanation of reference numerals in the attached drawings: 1. Fixed sleeve; 2. Inner hole tensioning assembly; 201. Cylinder; 202. Connecting frame; 203. Sleeve; 204. Drive shaft; 205. Connecting block; 206. Push plate; 207. Disc; 208. Waist-shaped groove; 209. Long groove; 210. Connecting piece; 211. Limiting post; 212. Limiting piece; 213. Elastic element; 3. Flexible compensation assembly; 31. Connecting ring; 32. Connecting arm; 33. Outer ring; 34. Annular inflation chamber; 35. Elastic airbag; 4. Clutch hub. Detailed Implementation

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

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Furthermore, "several" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0023] This utility model discloses a fixture for machining clutch gear hubs. (Refer to...) Figure 1-4 A clamp for machining a clutch hub includes a fixed sleeve 1, an inner hole tensioning assembly 2, and a flexible compensation assembly 3. The inner hole tensioning assembly 2 is rotatably connected inside the fixed sleeve 1, and the flexible compensation assembly 3 is rotatably connected outside the fixed sleeve 1. Both the inner hole tensioning assembly 2 and the flexible compensation assembly 3 achieve relative rotation with the fixed sleeve 1 through bearings.

[0024] The inner hole tensioning assembly 2 includes a cylinder 201, a connecting frame 202, a sleeve 203, a drive shaft 204, a connector 210, and a push plate 206. The connecting frame 202 has discs 207 at both its top and bottom. The cylinder 201 is fixed to the bottom disc 207 of the connecting frame 202, and its output end is connected to the drive shaft 204. The sleeve 203 is coaxially mounted on the top disc 207 of the connecting frame 202. The drive shaft 204 passes sequentially through the top of the connecting frame 202. The cylinder 201, consisting of a disc 207 and a sleeve 203, allows the drive shaft 204 to move vertically within the sleeve 203 during operation. The sleeve 203 has several elongated slots 209 on its sidewalls, and the drive shaft 204 has several connecting blocks 205 on its outer wall. Each connecting block 205 passes through a corresponding elongated slot 209, and at least two connecting blocks 205 are spaced apart within each set of elongated slots 209. The end of each connecting block 205 is hinged to one end of the connector 210. The other end of each connector 210 is hinged to the push plate 206. A limiting post 211 is provided at the bottom of the push plate 206. Several waist-shaped grooves 208 arranged in a circular array along the axis are radially opened on the top disc 207 of the connecting frame 202. The limiting post 211 passes through the waist-shaped groove 208, and a limiting piece 212 is provided at one end of the limiting post 211 passing through the waist-shaped groove 208. Through this design, the cylinder 201 drives the drive shaft 204 to move vertically within the sleeve 203. Two connecting blocks 205 spaced apart within a set of long slots 209 convert the linear motion of the drive shaft 204 into the radial expansion of the push plate 206 through a hinged connector 210. The limiting post 211 at the bottom of the push plate 206 is embedded in the waist-shaped groove 208 of the top disc 207 of the connecting frame 202. The limiting piece 212 constrains its movement trajectory, ensuring that the push plate 206 can only move along a preset radial path. The inner core is tightened, thereby achieving clamping of the inner hole of the clutch hub 4.

[0025] The flexible compensation component 3 includes a connecting ring 31, a connecting arm 32, an outer ring 33, an annular inflation chamber 34, and several elastic airbags 35. The outer ring 33 is fixed to the outside of the connecting ring 31 by the connecting arm 32. An annular groove is formed on the inner wall of the outer ring 33, and the annular inflation chamber 34 is disposed in the annular groove. The elastic airbags 35 communicate with the annular inflation chamber 34. An inflation port is formed at the bottom of the outer ring 33, and the annular inflation chamber 34 is connected to an external high-pressure air source through the inflation port. With this design, the external high-pressure air source supplies air to the annular inflation chamber 34 through the inflation port. Gas is injected into the annular inflation chamber 34. The annular inflation chamber 34 acts as a pressure buffer center, and the gas is evenly distributed to the circumferentially distributed independent elastic airbags 35. When there are dimensional tolerances or slight deformations in the gear hub, the elastic airbags 35 achieve local compensation through the pressure adaptive mechanism of the independent chambers. The airbag chambers corresponding to the areas with higher contact pressure are compressed due to the increased contact reaction force, resulting in an increase in internal air pressure. The pressure between adjacent chambers is rebalanced through the air passage system, ultimately forming a uniformly distributed radial clamping force.

[0026] The clamping and cooperation of the inner hole tensioning component 2 and the flexible compensation component 3 effectively prevents deformation of the clutch hub 4 during the processing, ensuring the rigidity and stability of the workpiece during the processing. The flexible compensation component 3 can fit the outer wall contour of the hub without causing damage to it.

[0027] The number of push plates 206 is set to at least 8, and the number of long grooves 209 and waist-shaped grooves 208 is also set to at least 8. The outer wall of the push plate 206 is provided with an elastic element 213. The elastic element 213 can be an elastic material such as rubber. The outer wall of the elastic element 213 is set to be arc-shaped so that it can fit the inner hole of the workpiece better.

[0028] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape and principle of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A clamp for clutch hub machining, characterized by: The device includes a fixed sleeve (1), an inner hole tensioning assembly (2), and a flexible compensation assembly (3). The inner hole tensioning assembly (2) is rotatably connected inside the fixed sleeve (1), and the flexible compensation assembly (3) is rotatably connected outside the fixed sleeve (1). The inner hole tensioning assembly (2) includes a cylinder (201), a connecting frame (202), a sleeve (203), a drive shaft (204), a connector (210), and a push plate (206). The connecting frame (202) has discs (207) at its top and bottom. The cylinder (201) is fixed to the bottom disc (207) of the connecting frame (202), and the output end of the cylinder (201) is connected to the drive shaft (204). The sleeve (203) is coaxially arranged on the top disc (207) of the connecting frame (202). The drive shaft (204) passes through the top disc (207) of the connecting frame (202) and the inner hole tensioning assembly (3). The sleeve (203) has several elongated grooves (209) on its side wall. The drive shaft (204) has several connecting blocks (205) correspondingly arranged on its outer wall. Each connecting block (205) passes through a corresponding elongated groove (209), and two connecting blocks (205) are spaced apart in each set of elongated grooves (209). The end of each connecting block (205) is hinged to one end of the connector (210). The other end of the connector (210) is hinged to the push plate (206). The bottom of the push plate (206) is provided with a limiting post (211). The top disc (207) of the connecting frame (202) is radially provided with a plurality of waist-shaped grooves (208) arranged in an annular array along the axis. The limiting post (211) passes through the waist-shaped groove (208). One end of the limiting post (211) passing through the waist-shaped groove (208) is provided with a limiting piece (212).

2. A fixture for machining a clutch hub according to claim 1, characterized in that: The flexible compensation component (3) includes a connecting ring (31), a connecting arm (32), an outer ring (33), an annular inflation chamber (34), and several elastic airbags (35). The outer ring (33) is fixed to the outside of the connecting ring (31) by the connecting arm (32). An annular groove is provided on the inner wall of the outer ring (33). The annular inflation chamber (34) is disposed in the annular groove. The elastic airbags (35) are connected to the annular inflation chamber (34). An inflation port is provided at the bottom of the outer ring (33). The annular inflation chamber (34) is connected to an external high-pressure air source through the inflation port.

3. A fixture for machining a clutch hub as defined in claim 1, wherein: The number of the long groove (209), waist-shaped groove (208) and push plate (206) is set to at least 8.

4. The clamp for machining a clutch hub according to claim 1, wherein: The outer wall of the push plate (206) is provided with an elastic element (213).

5. A fixture for machining a clutch hub as defined in claim 4, wherein: The outer wall of the elastic element (213) is set to be arc-shaped.

6. A fixture for machining a clutch hub as defined in claim 1, wherein: Both the inner hole tensioning component (2) and the flexible compensation component (3) achieve relative rotation with the fixed sleeve (1) through bearings.

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