A kind of axle hub clamping processing frock

Abstract

The utility model belongs to hub machining technical field especially relates to a axle hub clamping machining frock. The frock includes main part and inner support mechanism, and the main part includes turnover frame, and the turnover frame centre is provided with circular mounting slot, and its circumference is provided with several fixed frame, and the fixed frame is connected with telescopic frame in the sliding mode, and the telescopic frame end portion rotationally installs a pair of concave formula clamping wheel, and one telescopic frame bottom end is equipped with drive mechanism, and the inner support mechanism includes several inner support rod, and several inner support rod synchronous radial telescopic clamping hub inner wall, and drive mechanism drives concave formula clamping wheel to drive hub rotation, and the both cooperation carries out inner and outer clamping and spin direction displacement to hub. The utility model discloses through inside and outside two -way collaborative clamping structure, makes hub in single station realizes synchronous positioning and rotation machining, reduces the clamping and alignment error, promotes the processing accuracy and the beat.

Description

Technical Field

[0001] This utility model relates to the field of wheel hub processing technology, specifically a clamping tooling for axle wheel hubs. Background Technology

[0002] As a core load-bearing component of the automotive transmission system, the machining accuracy of the axle and wheel hub directly determines the vehicle's driving stability and safety. In the wheel hub machining process, clamping fixtures are used to fix the wheel hub in place to ensure the accuracy of milling, drilling, grinding, and other processes.

[0003] Currently, the mainstream wheel hub clamping fixtures in the industry generally adopt internal support type fixtures. However, when dealing with the processing needs of wheel hubs in multiple positions, this design requires repeatedly loosening and loosening the fixture to adjust the wheel hub direction. This not only seriously drags down the processing efficiency, but also easily causes positioning deviations, becoming a key bottleneck restricting the large-scale and high-precision production of wheel hubs. Utility Model Content

[0004] In view of the technical problems existing in the background art, this utility model provides a clamping tooling for vehicle axle wheel hubs.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows: A wheel hub clamping and processing fixture for axles includes a main body and an inner support mechanism. The main body includes a tilting frame with a circular mounting groove at the center. Several fixed frames are fixedly connected to the top surface of the tilting frame along the circumference of the circular mounting groove. Telescopic frames are slidably connected inside each fixed frame. A pair of concave clamping wheels are rotatably connected to one end of the telescopic frame. A drive mechanism is provided at the bottom end of one of the telescopic frames. The inner support mechanism includes several inner support rods, which synchronously extend and retract radially to clamp the inner wall of the wheel hub. The drive mechanism drives the concave clamping wheel to rotate the wheel hub. The two work together to clamp the wheel hub internally and externally and to change its rotation direction.

[0006] Optionally, the internal support mechanism also includes a base frame, which is embedded in the interior of a circular mounting groove. The top surface of the base frame has several sliding grooves, and each sliding groove has a movable block slidably connected inside. The tops of the movable blocks are fixedly connected to the internal support rod.

[0007] Optionally, a turntable is rotatably connected to the top of the base frame, and several L-shaped connecting rods are rotatably connected to the bottom edge of the turntable. The other ends of the L-shaped connecting rods are rotatably connected to the bottom center of the moving block. A third drive motor is fixedly connected to the bottom of the base frame, and the output end of the third drive motor is connected to the turntable for transmission.

[0008] Optionally, the drive mechanism includes a transmission box fixedly connected to the bottom end of one of the telescopic frames. A pair of synchronous pulleys are rotatably connected inside the transmission box. A synchronous belt is wound between the pair of synchronous pulleys. The bottom center shafts of the pair of synchronous pulleys are fixedly connected to the top center shafts of the corresponding concave clamping wheels. A first reduction motor is fixedly connected to the bottom end of the transmission box. The output shaft of the first reduction motor is drivenly connected to one of the synchronous pulleys.

[0009] Optionally, a pneumatic telescopic rod is inserted at the center of one end of the fixed frame, and the output end of the pneumatic telescopic rod is fixedly connected to one end of the telescopic frame.

[0010] Optionally, the main body also includes a base, with a mounting seat fixedly connected to the outside of the base. A tilting frame is rotatably connected inside the mounting seat via a pin. A second geared motor is fixedly mounted on the outside of the mounting seat, and the output end of the second geared motor is connected to the pin of the tilting frame for transmission.

[0011] Optionally, connecting frames are fixedly installed on both sides of the base, and a pair of support frames are fixedly installed on one side of the bottom of the flipping frame.

[0012] Optionally, telescopic dust covers are fixedly installed at both ends of the movable block, and the opposite ends of each pair of telescopic dust covers are fixedly connected to both ends of the slide groove.

[0013] Optionally, the concave clamping wheels are made of rubber, and flexible pressure sensors are provided on the outer side of the inner support rods.

[0014] This utility model has the following advantages and beneficial effects: This invention achieves coordinated internal and external fixation of the axle wheel hub at the same workstation by setting three sets of external clamping mechanisms and a centrally embedded internal support mechanism on the flipping frame. Compared with the existing processing method that uses a single internal support fixture and requires repeated clamping and loosening to adjust the wheel hub position, this reduces the number of clamping operations and errors caused by repeated positioning, shortens the processing cycle, and improves process continuity. The external clamping mechanism is driven by a pneumatic telescopic rod, using a rubber concave clamping wheel to stably clamp the bottom of the wheel hub from the outside, and is driven by a drive motor to adjust the circumferential direction of the wheel hub in the clamped state. The internal support mechanism is driven by a third drive motor to rotate the turntable, which pushes four moving blocks to move synchronously radially along the slide groove via an L-shaped connecting rod, thereby controlling the synchronous extension and retraction of the internal support rod to evenly support the inner wall of the wheel hub from the inside, adapting to different inner diameter sizes. The flipping frame is driven by a second geared motor and can rotate as a whole to adjust the wheel hub processing angle. This structure integrates the clamping, rotation, and flipping functions of the wheel hub while ensuring clamping stability, improving the practicality of the fixture and processing efficiency. Attached Figure Description

[0015] Figure 1 This is an overall structural diagram of the axle and wheel hub clamping machining fixture of this utility model; Figure 2 The flipped state of the axle and wheel hub clamping machining fixture of this utility model. Figure 1 ; Figure 3 The flipped state of the axle and wheel hub clamping machining fixture of this utility model. Figure 2 ; Figure 4 This is a structural diagram of the internal support mechanism of this utility model; Figure 5 This is a partial view of the axle and wheel hub clamping tooling of this utility model; Figure 6 This is a cross-sectional view of the drive structure of this practical application.

[0016] Reference numerals: 1. Main body; 101. Base; 102. Connecting frame; 103. Second geared motor; 105. Tilting frame; 106. Support frame; 107. Fixed frame; 108. Pneumatic telescopic rod; 109. Telescopic frame; 110. Concave clamping wheel; 111. First geared motor; 113. Transmission box; 114. Synchronous pulley; 115. Synchronous belt; 116. Mounting seat; 2. Internal support mechanism; 201. Base frame; 202. Third drive motor; 203. Slide groove; 204. Internal support rod; 205. Telescopic dust cover; 206. Moving block; 207. Turntable; 208. L-shaped connecting rod. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0018] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0019] Example like Figures 1-6As shown, a wheel hub clamping and processing fixture includes a main body 1 and an inner support mechanism 2. The main body 1 includes a tilting frame 105, which allows the wheel hub to be adjusted at multiple angles during processing to adapt to the processing requirements of different workstations. A circular mounting groove is provided at the center of the tilting frame 105. Several fixed frames 107 are fixedly connected to the top surface of the tilting frame 105 along the circumference of the circular mounting groove. Telescopic frames 109 are slidably connected inside each fixed frame 107. In this embodiment, there are three fixed frames 107, evenly distributed at 120°. A telescopic frame 109 is slidably connected inside each fixed frame 107, and the telescopic frame 109 can slide radially along the fixed frame 107. A pair of concave clamping wheels 110 are rotatably connected to one end of the telescopic frame 109 for clamping the outer bottom edge of the wheel hub. A driving mechanism is provided at the bottom end of one telescopic frame 109, which can drive its corresponding pair of concave clamping wheels 110 to rotate synchronously.

[0020] The inner support mechanism 2 includes several inner support rods 204, which can synchronously extend and retract radially to clamp the inner wall of the hub. Simultaneously, the inner support rods 204 work in conjunction with the concave clamping wheel 110 to form an internal and external clamping of the hub, ensuring stability during processing. At the same time, the concave clamping wheel 110 drives the hub to rotate via a drive mechanism, ensuring that the hub can achieve the required rotation and angle adjustment. The cooperation of both effectively prevents hub misalignment and ensures high precision during processing.

[0021] Furthermore, the inner support mechanism 2 also includes a base frame 201, which is embedded in the interior of a circular mounting groove to achieve structural integration and stable support. The top surface of the base frame 201 has several sliding grooves 203. In this embodiment, there are four sliding grooves 203, evenly distributed circumferentially along the axis of the base frame 201. Each sliding groove 203 has a sliding block 206 slidably connected inside it, allowing the sliding block 206 to slide radially within the groove. The tops of the sliding blocks 206 are fixedly connected to the inner support rod 204. Therefore, when the sliding block 206 moves, it causes the inner support rod 204 to extend and retract synchronously, thus supporting or releasing the inner wall of the wheel hub.

[0022] Furthermore, a turntable 207 is rotatably connected to the top of the base frame 201, and the turntable 207 can rotate around its central axis. Several L-shaped connecting rods 208 are rotatably connected to the bottom edge of the turntable 207. In this embodiment, there are four L-shaped connecting rods 208, evenly distributed on the outer edge of the turntable 207. The other ends of the four L-shaped connecting rods 208 are rotatably connected to the bottom center of four moving blocks 206, forming four sets of linkage mechanisms. A third drive motor 202 is fixedly connected to the bottom of the base frame 201, and the output end of the third drive motor 202 is connected to the turntable 207. When the third drive motor 202 starts, it drives the turntable 207 to rotate, pushing or pulling the four moving blocks 206 synchronously radially within the slide groove 203 via the L-shaped connecting rods 208, thereby achieving synchronous extension and retraction of the four inner support rods 204 and ensuring uniform distribution of clamping force.

[0023] Furthermore, the drive mechanism includes a transmission box 113 fixedly connected to the bottom end of one of the telescopic frames 109. A pair of synchronous pulleys 114 are rotatably connected inside the transmission box 113, and a synchronous belt 115 is wound between the pair of synchronous pulleys 114, forming a synchronous transmission structure. The bottom central shafts of the pair of synchronous pulleys 114 are fixedly connected to the top central shafts of a pair of concave clamping wheels 110 at their corresponding positions, enabling the two clamping wheels to rotate synchronously. A first reduction motor 111 is fixedly connected to the bottom end of the transmission box 113, and the output shaft of the first reduction motor 111 is drively connected to one of the synchronous pulleys 114. When the first reduction motor 111 operates, the pair of concave clamping wheels 110 are driven to rotate synchronously through the cooperation of the synchronous pulleys 114 and the synchronous belt 115, thereby causing the clamped wheel hub to rotate around its axis, achieving orientation adjustment before processing.

[0024] Furthermore, a pneumatic telescopic rod 108 is inserted at the center of one end of each fixed frame 107, and the output end of the pneumatic telescopic rod 108 is fixedly connected to one end of the telescopic frame 109. By controlling the extension and retraction of the pneumatic telescopic rod 108, the telescopic frame 109 can be driven to move radially along the fixed frame 107, thereby adjusting the clamping force between the concave clamping wheel 110 and the wheel hub, adapting to axle wheel hubs of different outer diameters, and improving the versatility and automation of the tooling.

[0025] Furthermore, the main body 1 also includes a base 101, which serves as the basic support structure for the entire tooling. A mounting base 116 is fixedly connected to the outer side of the base 101. A tilting frame 105 is rotatably connected inside the mounting base 116 via a pin, allowing the tilting frame 105 to rotate around the pin axis. A second reduction motor 103 is fixedly mounted on the outer side of the mounting base 116, and the output end of the second reduction motor 103 is connected to the pin of the tilting frame 105. When the second reduction motor 103 is started, it drives the tilting frame 105 to tilt as a whole, thereby adjusting the spatial posture of the hub to meet the needs of multi-angle and multi-faceted processing.

[0026] Furthermore, connecting brackets 102 are fixedly installed on both sides of the base 101, which can be bolted to firmly fix the tooling to the machine tool worktable, improving machining stability. A pair of support brackets 106 are fixedly installed on one side of the bottom of the tilting frame 105. When the tilting frame 105 is in a horizontal working position, the support brackets 106 contact the base 101 or the external support surface, providing auxiliary support, enhancing the load-bearing capacity of the tilting frame 105, and preventing structural deformation due to machining vibration or heavy load.

[0027] Furthermore, each movable block 206 is fixedly equipped with a telescopic dust cover 205 at both ends, and the opposite ends of each pair of telescopic dust covers 205 are fixedly connected to both ends of the slide groove 203. The telescopic dust covers 205 extend and retract as the movable block 206 moves, always covering the opening area of ​​the slide groove 203, effectively preventing metal shavings, coolant, and dust generated during processing from entering the interior of the slide groove 203, ensuring smooth sliding of the movable block 206, reducing wear, and extending the service life of the equipment.

[0028] Furthermore, the concave clamping wheel 110 is made of rubber. Rubber has excellent elasticity and friction properties, which increases friction with the wheel hub surface to prevent slippage and avoids direct metal-to-metal contact that could cause scratches or indentations on the wheel hub surface, achieving non-destructive clamping. Flexible pressure sensors are installed on the outer side of the inner support rod 204. These sensors monitor the contact pressure between the inner support rod 204 and the inner wall of the wheel hub in real time and feed the signal back to the control system. When the pressure is too high, it automatically adjusts to prevent wheel hub deformation; when the pressure is insufficient, it compensates to ensure stable support, achieving intelligent and safe clamping control.

[0029] Specifically, the working principle of this axle hub clamping and processing fixture is as follows: During use, the fixture is first fixed via the connecting brackets 102 on both sides of the base 101. The axle hub is then placed in the circular mounting slot at the center of the tilting frame 105. The third drive motor 202 inside the base frame 201 is activated, causing the turntable 207 to rotate. The turntable 207 pulls four moving blocks 206 outwards synchronously along the slide groove 203 via the L-shaped connecting rod 208, allowing the inner support rod 204 to support the hub from the inside out. The flexible pressure sensor on the outside of the inner support rod 204 monitors the support pressure to ensure appropriate pressure without damaging the hub. Simultaneously, the pneumatic telescopic rod 108 on the fixing frame 107 is activated, pushing the telescopic frame 109 towards the hub until the rubber concave clamping wheel 110 fits against the bottom of the outer side of the hub, achieving coordinated internal and external fixation. During operation, if the hub angle needs to be adjusted, start the second drive reduction motor 103 on the outside of the mounting base 116 to drive the tilting frame 105 to rotate to the required angle. The support frame 106 at the bottom of the tilting frame 105 provides auxiliary support when placed horizontally. If the hub direction needs to be adjusted, first control the inner support rod 204 to retract, then start the first reduction motor 111 on one side of the transmission box 113 to drive the synchronous pulley 114 and the synchronous belt 115 to rotate, so that one pair of concave clamping wheels 110 rotate synchronously, and cooperate with the other two pairs of concave clamping wheels 110 to drive the hub to rotate to the target direction. Then control the inner support rod 204 to support and fix it. During the processing, the telescopic dust cover 205 at both ends of the moving block 206 prevents debris from entering the slide groove 203. After the processing is completed, reverse the operation of each component, loosen the hub and reset the tooling.

[0030] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A clamping and machining fixture for vehicle axle hubs, characterized in that: The device includes a main body (1) and an internal support mechanism (2). The main body (1) includes a flipping frame (105). A circular mounting groove is provided at the center of the flipping frame (105). Several fixed frames (107) are fixedly connected to the top surface of the flipping frame (105) along the circumference of the circular mounting groove. Telescopic frames (109) are slidably connected inside each fixed frame (107). A pair of concave clamping wheels (110) are rotatably connected to one end of each telescopic frame (109). A driving mechanism is provided at the bottom end of one of the telescopic frames (109). The inner support mechanism (2) includes several inner support rods (204). The several inner support rods (204) synchronously extend and retract radially to clamp the inner wall of the hub. The driving mechanism drives the concave clamping wheel (110) to rotate the hub. The two work together to clamp the hub internally and externally and change its rotation direction.

2. The axle hub clamping and machining fixture according to claim 1, characterized in that: The inner support mechanism (2) also includes a base frame (201), which is embedded in the interior of a circular mounting groove. The top surface of the base frame (201) is provided with several sliding grooves (203), and each sliding groove (203) is slidably connected to a moving block (206). The top of each of the moving blocks (206) is fixedly connected to the inner support rod (204).

3. The axle hub clamping and machining fixture according to claim 2, characterized in that: The base frame (201) is rotatably connected to the top of the interior of a turntable (207). Several L-shaped connecting rods (208) are rotatably connected to the bottom edge of the turntable (207). The other ends of the L-shaped connecting rods (208) are rotatably connected to the bottom center of the moving block (206). A third drive motor (202) is fixedly connected to the bottom of the interior of the base frame (201). The output end of the third drive motor (202) is connected to the turntable (207) in a transmission connection.

4. The axle hub clamping and machining fixture according to claim 1, characterized in that: The drive mechanism includes a transmission box (113) fixedly connected to the bottom end of one of the telescopic frames (109). A pair of synchronous pulleys (114) are rotatably connected inside the transmission box (113). A synchronous belt (115) is wound between the pair of synchronous pulleys (114). The bottom center axis of the pair of synchronous pulleys (114) is fixedly connected to the top center axis of the concave clamping wheel (110) at the corresponding position. A first reduction motor (111) is fixedly connected to the bottom end of the transmission box (113). The output shaft of the first reduction motor (111) is drivenly connected to one of the synchronous pulleys (114).

5. The axle hub clamping and machining fixture according to claim 1, characterized in that: Each of the fixed frames (107) has a pneumatic telescopic rod (108) inserted at the center of one end, and the output end of the pneumatic telescopic rod (108) is fixedly connected to one end of the telescopic frame (109).

6. The axle hub clamping machining fixture according to claim 1, characterized in that: The main body (1) also includes a base (101), on the outside of which a mounting seat (116) is fixedly connected. Inside the mounting seat (116) is a rotating frame (105) rotatably connected via a pin. On the outside of the mounting seat (116) a second geared motor (103) is fixedly mounted. The output end of the second geared motor (103) is connected to the pin of the rotating frame (105) via a transmission connection.

7. The axle hub clamping machining fixture according to claim 6, characterized in that: A connecting frame (102) is fixedly installed on both sides of the base (101), and a pair of support frames (106) are fixedly installed on one side of the bottom of the flipping frame (105).

8. The axle hub clamping and machining fixture according to claim 2, characterized in that: Both ends of the movable block (206) are fixedly installed with telescopic dust covers (205), and the opposite ends of each pair of telescopic dust covers (205) are fixedly connected to both ends of the slide groove (203).

9. The axle hub clamping and machining fixture according to claim 1, characterized in that: The concave clamping wheel (110) is made of rubber, and the outer side of the inner support rod (204) is equipped with a flexible pressure sensor.

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