A positioning fixture and chamfering device for automobile half shafts

Abstract

This utility model discloses an automotive half-shaft positioning fixture and chamfering device. The automotive half-shaft positioning fixture includes a bearing mechanism, which includes a bearing platform and a boss. The top surface of the bearing platform forms a bearing surface, which is inclined relative to the horizontal plane. The angle between the bearing surface and the horizontal plane is equal to the angle between the first end face and the second end face of the flange of the half-shaft. The boss is a columnar structure, and one end of the boss is fixedly connected to the bearing surface. The bearing surface is used to support the half-shaft and to abut against the first end face of the flange. The other end of the boss is used to slide into the mating groove of the flange. The beneficial effects of this utility model are: it can realize the leveling of the inclined end of the screw hole on the half-shaft of this structure before chamfering. After the grinding head is fed to the preset height, it can directly grind and polish each point of the screw hole without constantly adjusting the feed height of the grinding head, which can improve the chamfering efficiency and chamfering accuracy.

Description

Technical Field

[0001] This utility model relates to the field of automotive half-shaft processing technology, and in particular to an automotive half-shaft positioning fixture and chamfering device. Background Technology

[0002] The half-shaft is a key component in the drive axle, responsible for connecting the differential to the drive wheels and transmitting torque between the transmission, reducer, and drive wheels. Existing automotive half-shafts, such as... Figure 1 - Figure 2 As shown, the half-shaft 100 includes a flange 110 and a shaft 120. The flange 110 has a first end face 111 and a second end face 112. The first end face 111 is a plane, and the second end face 112 is a conical surface. The flange 110 has a mating groove 113 and a plurality of screw holes 114. The mating groove 113 is a circular structure and is located on the first end face 111 and coaxial with the flange 110. Each screw hole 114 is circumferentially opened on the side of the mating groove 113 and is distributed in a ring array structure. The screw holes 114 extend along the axial direction of the flange 110 and penetrate the first end face 111 and the second end face 112. The shaft 120 is coaxially arranged with the flange 110, and one end of the shaft 120 is fixedly connected to the second end face 112.

[0003] During the production of the aforementioned automotive half-shaft, the openings of each screw hole need to be chamfered to remove burrs. Since one end of each screw hole is located on the second end face of the flange, and the second end face of the flange is a conical surface, when using existing automotive half-shaft chamfering devices (such as the half-shaft flange chamfering machine disclosed in application number 201420641824.2) to chamfer the beveled ends of the screw holes on the aforementioned half-shaft, the grinding head first grinds and polishes the high point of the beveled end, and finally grinds and polishes the low point of the beveled end. During this process, it is also necessary to grind and polish other points between the high and low points in sequence. Throughout the chamfering process, the feed height of the grinding head needs to be constantly adjusted, which reduces the chamfering efficiency and accuracy. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose an automotive half-shaft positioning fixture and chamfering device to solve the technical problem that in the process of chamfering the inclined end of the screw hole on the half-shaft of this structure, it is necessary to continuously adjust the feed height of the grinding head to reach different heights of the inclined end, which will reduce the chamfering efficiency and chamfering accuracy.

[0005] To achieve the above technical objectives, the present invention provides an automotive half-shaft positioning fixture, comprising:

[0006] The bearing mechanism includes a bearing platform and a boss. The top surface of the bearing platform forms a bearing surface. The bearing surface is inclined relative to the horizontal plane, and the angle between the bearing surface and the horizontal plane is equal to the angle between the first end face and the second end face of the flange of the half shaft. The boss is a columnar structure, and one end of the boss is fixedly connected to the bearing surface. The bearing surface is used to support the half shaft and to abut against the first end face of the flange. The other end of the boss is used to slide into the mating groove of the flange.

[0007] Furthermore, the support platform has a columnar structure and can rotate around its central axis, and the boss is coaxial with the support platform.

[0008] Furthermore, the aforementioned automotive half-shaft positioning fixture also includes a positioning mechanism, which is detachably connected to the bearing platform and the flange of the half-shaft to restrict the rotation of the half-shaft.

[0009] Furthermore, the positioning mechanism includes multiple positioning pins, each of which is arranged circumferentially on the side of the boss and distributed in a ring array structure. The lower end of each positioning pin is detachably and fixedly connected to the bearing platform, and the upper end of each positioning pin is used to slide into the respective screw holes on the flange one by one.

[0010] Furthermore, the support platform is provided with multiple insertion holes, each of which is circumferentially located on the side of the boss and distributed in a ring array structure. The lower end of each positioning pin is slidably inserted into each of the insertion holes.

[0011] Furthermore, when the lower end of the positioning pin is slidably inserted into the insertion hole, the distance from the top of the positioning pin to the bearing surface is less than the depth of the screw hole.

[0012] Furthermore, the aforementioned automotive half-shaft positioning fixture also includes a drive mechanism connected to the bearing platform, which drives the bearing platform to rotate intermittently by a preset angle so that each screw hole on the flange reaches its highest position in sequence.

[0013] Furthermore, the driving mechanism includes a gear ring, multiple docking shafts, a rotating shaft, half gears, a limiting disk, and a first rotational driving component. The gear ring is fixedly sleeved on the outer wall of the bearing platform. Each docking shaft is circumferentially arranged on the side of the bearing platform and distributed in a ring array structure. The lower end of each docking shaft is fixedly connected to the gear ring. The rotating shaft is arranged on the side of the gear ring and extends along the axial direction of the bearing platform. The limiting disk is coaxially fixedly sleeved on the rotating shaft. The arc-shaped wall of the limiting disk abuts against two adjacent docking shafts. A guide groove is formed on the limiting disk for the docking shaft to slide into. The half gear is coaxially fixedly sleeved on the rotating shaft and is used to mesh or separate from the gear ring. The starting end of the half gear corresponds to the guide groove. The output end of the first rotational driving component is coaxially fixedly connected to one end of the rotating shaft and is used to drive the rotating shaft to rotate.

[0014] On the other hand, this utility model also provides a chamfering device, including a frame, a plurality of the above-mentioned automotive half-shaft positioning fixtures and a chamfering mechanism, wherein the bearing platform is connected to the frame, and the chamfering mechanism is disposed above the bearing platform for chamfering the screw holes of the flange rotated to the highest position.

[0015] Furthermore, the chamfering mechanism includes a polishing head, a second rotating drive, and a telescopic drive. The polishing head corresponds to the highest screw hole. The output end of the second rotating drive is fixedly connected to the polishing head and is used to drive the polishing head to rotate so that the polishing head polishes the screw hole. The fixed end of the telescopic drive is connected to the frame, and the output end of the telescopic drive is fixedly connected to the second rotating drive and is used to drive the second rotating drive to move up and down to adjust the height of the polishing head.

[0016] Compared with the prior art, the beneficial effects of this utility model include: during use, the half-shaft is placed on the bearing surface, and the first end face of the flange of the half-shaft abuts against the bearing surface. During this process, it is also necessary to ensure that the boss slides into the mating groove of the flange. Since the angle between the bearing surface and the horizontal plane is equal to the angle between the first end face and the second end face of the flange of the half-shaft, when the first end face of the flange abuts against the bearing surface, the highest point of the second end face of the flange will be a horizontal line. In addition, the diameter of the screw hole is small. When the screw hole to be chamfered is rotated to the highest position, the surface where the opening of the screw hole to be chamfered is located will tend to be a horizontal plane, thereby achieving the leveling of the inclined end of the screw hole on the half-shaft of this structure before chamfering. When the grinding head is fed to the preset height, the screw hole can be ground and polished directly without constantly adjusting the feed height of the grinding head, which can improve the chamfering efficiency and chamfering accuracy. Attached Figure Description

[0017] Figure 1This is a schematic diagram of the existing three-dimensional structure of the half-shaft;

[0018] Figure 2 This is a three-dimensional structural diagram of the existing semi-axis from another perspective;

[0019] Figure 3 This is a three-dimensional structural diagram of a chamfering device provided by this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of a chamfering device provided by this utility model during operation;

[0021] Figure 5 This is a three-dimensional structural schematic diagram of an automotive half-shaft positioning fixture provided by this utility model;

[0022] In the diagram: 100 - half shaft, 110 - flange, 111 - first end face, 112 - second end face, 113 - mating groove, 114 - screw hole, 120 - shaft body, 200 - bearing mechanism, 210 - bearing platform, 211 - bearing surface, 212 - insertion hole, 220 - boss, 300 - positioning mechanism, 310 - positioning pin, 400 - drive mechanism, 410 - gear ring, 420 - mating shaft, 430 - rotating shaft, 440 - half gear, 450 - limit plate, 451 - guide groove, 460 - first rotating drive component, 500 - frame, 600 - chamfering mechanism, 610 - polishing head, 620 - second rotating drive component, 630 - telescopic drive component. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0024] This utility model provides a positioning fixture for automotive half-shafts, the structure of which is as follows: Figure 3 - Figure 5 As shown, the device includes a support mechanism 200, which includes a support platform 210 and a boss 220. The top surface of the support platform 210 forms a support surface 211. The support surface 211 is inclined relative to the horizontal plane, and the angle between the support surface 211 and the horizontal plane is equal to the angle between the first end face 111 and the second end face 112 of the flange 110 of the half shaft 100. The boss 220 is a columnar structure, and one end of the boss 220 is fixedly connected to the support surface 211. The support surface 211 is used to support the half shaft 100 and to abut against the first end face 111 of the flange 110. The other end of the boss 220 is used to slide into the mating groove 113 of the flange 110.

[0025] In use, the half-shaft 100 is placed on the bearing surface 211, and the first end face 111 of the flange 110 of the half-shaft 100 abuts against the bearing surface 211. During this process, it is also necessary to ensure that the boss 220 slides into the mating groove 113 of the flange 110. Since the angle between the bearing surface 211 and the horizontal plane is equal to the angle between the first end face 111 and the second end face 112 of the flange 110 of the half-shaft 100, when the first end face 111 of the flange 110 abuts against the bearing surface 211, the flange... The highest point of the second end face 112 of flange 110 will be a horizontal line. In addition, the diameter of screw hole 114 is small. When screw hole 114 to be chamfered is rotated to the highest position, the surface where the opening of screw hole 114 to be chamfered is located will tend to be a horizontal plane. This achieves the leveling of the inclined end of screw hole 114 on half shaft 100 of this structure before chamfering. When the grinding head is fed to the preset height, it can directly grind and polish each point of screw hole 114 without constantly adjusting the feed height of the grinding head, which can improve chamfering efficiency and chamfering accuracy.

[0026] As a preferred embodiment, please refer to Figure 3 The bearing platform 210 has a columnar structure and can rotate around its central axis. The boss 220 is coaxial with the bearing platform 210. Rotating the bearing platform 210 can drive the half shaft 100 to rotate, thereby allowing each screw hole 114 on the flange 110 to rotate to its highest position in sequence.

[0027] As a preferred embodiment, please refer to Figure 3 The aforementioned automotive half-shaft positioning fixture also includes a positioning mechanism 300. The positioning mechanism 300 is detachably connected to the flange 110 of the bearing platform 210 and the half-shaft 100, and is used to restrict the rotation of the half-shaft 100, so that the half-shaft 100 can rotate along with the bearing platform 210 during rotation.

[0028] As a preferred embodiment, please refer to Figure 3The positioning mechanism 300 includes multiple positioning pins 310, each of which is circumferentially arranged on the side of the boss 220 and distributed in a ring array. The lower end of each positioning pin 310 is detachably and fixedly connected to the bearing platform 210, and the upper end of each positioning pin 310 is used to slide into the corresponding screw holes 114 on the flange 110, placing the half shaft 100 on the bearing surface 211, and aligning the first end face 111 of the flange 110 of the half shaft 100 with the bearing surface 211. The bearing surface 211 abuts against the flange. During this process, it is also necessary to ensure that the boss 220 slides into the mating groove 113 of the flange 110, and that the upper end of each of the positioning pins 310 slides into the corresponding screw holes 114 on the flange 110, so as to position the half shaft 100 and ensure that the half shaft 100 can rotate with the bearing platform 210 during rotation. The half shaft 100 is positioned by using multiple positioning pins 310, which has a simple structure, accurate positioning, and is easy to disassemble and assemble.

[0029] As a preferred embodiment, please refer to Figure 3 and Figure 5 The support platform 210 is provided with a plurality of insertion holes 212. Each insertion hole 212 is provided circumferentially on the side of the boss 220 and is distributed in a ring array structure. The lower end of each positioning pin 310 is slidably inserted into each insertion hole 212. Each positioning pin 310 is detachably connected to the support platform 210 for easy assembly and disassembly.

[0030] In a preferred embodiment, when the lower end of the positioning pin 310 is slidably inserted into the insertion hole 212, the distance from the top of the positioning pin 310 to the bearing surface 211 is less than the depth of the screw hole 114, so as to avoid the positioning pin 310 interfering with the chamfer of the screw hole 114.

[0031] As a preferred embodiment, please refer to Figure 3 and Figure 5 The aforementioned automotive half-shaft positioning fixture also includes a drive mechanism 400, which is connected to the bearing platform 210 and is used to drive the bearing platform 210 to rotate intermittently by a preset angle so that each screw hole 114 on the flange 110 reaches its highest position in sequence. By operating the drive mechanism 400, the drive mechanism 400 can drive the bearing platform 210 to rotate intermittently by a preset angle, thereby allowing each screw hole 114 on the flange 110 to reach its highest position in sequence, and allowing each screw hole 114 to be leveled in sequence.

[0032] As a preferred embodiment, please refer to Figure 5The driving mechanism 400 includes a gear ring 410, multiple docking shafts 420, a rotating shaft 430, a half gear 440, a limiting disk 450, and a first rotation driving component 460. The gear ring 410 is fixedly sleeved on the outer side wall of the bearing platform 210. Each docking shaft 420 is circumferentially arranged on the side of the bearing platform 210 and distributed in a ring array structure. The lower end of each docking shaft 420 is fixedly connected to the gear ring 410. The rotating shaft 430 is arranged on the side of the gear ring 410 and extends along the axial direction of the bearing platform 210. The limiting disk 450 is coaxially fixedly sleeved on the rotating shaft 430. The arc-shaped wall of the limiting disk 450 abuts against the two adjacent docking shafts 420. A guide groove 451 is provided on the limiting disk 450 for the docking shafts 420 to slide into. The half-gear 440 is coaxially fixedly sleeved on the rotating shaft 430 and is used to mesh or separate from the gear ring 410. The starting end of the half-gear 440 corresponds to the guide groove 451. The output end of the first rotation drive 460 is coaxially fixedly connected to one end of the rotating shaft 430 to drive the rotating shaft 430 to rotate. In the initial position, the screw hole 114 of one of the flanges 110 is in the highest position. Because the arc-shaped wall of the limiting disk 450 abuts against the two adjacent docking shafts 420, the bearing platform 210 can be limited, preventing the bearing platform 210 from rotating. This avoids the half-shaft 100 from rotating during the chamfering process of the screw hole 114 on the half-shaft 100, ensuring the smooth chamfering. After the screw hole 114 is chamfered, by operating the first rotation drive 460, the output end of the first rotation drive 460 rotates, which can drive the rotating shaft 430 to rotate, and drive the half gear 440 and the limiting disk 450 to rotate. When the initial end of the half gear 440 is in contact with the gear ring 4... After engagement, the half gear 440 drives the gear ring 410 to rotate. Since the starting end of the half gear 440 corresponds to the guide groove 451, when the gear ring 410 starts to rotate, the docking shaft 420 corresponding to the guide groove 451 will slide into the guide groove 451. When the ending end of the half gear 440 separates from the gear ring 410, the gear ring 410 rotates through a preset angle, and the docking shaft 420 in the guide groove 451 slides out of the guide groove 451. The next screw hole 114 on the flange 110 reaches the highest position, realizing intermittent driving of the bearing platform 210.

[0033] As a preferred embodiment, please refer to Figure 5The number of docking shafts 420 is equal to the number of insertion holes 212, and each docking shaft 420 corresponds one-to-one with each insertion hole 212. If the number of screw holes 114 on the flange 110 is 6, then the number of insertion holes 212 on the bearing platform 210 is 6, and the number of docking shafts 420 is 6. Each time the half gear 440 meshes with the gear ring 410, the gear ring 410 rotates 60°.

[0034] Please refer to Figure 3 and Figure 4 Based on the aforementioned automotive half-shaft positioning fixture, this utility model also provides a chamfering device, including a frame 500, multiple of the aforementioned automotive half-shaft positioning fixtures, and a chamfering mechanism 600. The bearing platform 210 is connected to the frame 500, and the chamfering mechanism 600 is disposed above the bearing platform 210 for chamfering the screw holes 114 of the flange 110 when it is rotated to the highest position. When a screw hole 114 on the flange 110 reaches the highest position, the chamfering mechanism 600 can be used to chamfer the screw hole 114 of the flange 110 when it is rotated to the highest position.

[0035] As a preferred embodiment, please refer to Figure 3 The chamfering mechanism 600 includes a polishing head 610, a second rotation drive 620, and a telescopic drive 630. The polishing head 610 corresponds to the highest screw hole 114. The output end of the second rotation drive 620 is fixedly connected to the polishing head 610 and is used to drive the polishing head 610 to rotate so that the polishing head 610 polishes the screw hole 114. The fixed end of the telescopic drive 630 is connected to the frame 500, and the output end of the telescopic drive 630 is fixedly connected to the second rotation drive 620 and is used to drive the second rotation drive 620. The height of the polishing head 610 is adjusted by moving the 620 up and down. When one of the screw holes 114 on the flange 110 reaches the highest position, the output end of the telescopic drive 630 is extended by operating the telescopic drive 630, which drives the second rotation drive 620 to move downward until the polishing head 610 reaches the opening of the screw hole 114. Then, the output end of the second rotation drive 620 is rotated by operating the second rotation drive 620, which drives the polishing head 610 to rotate. The polishing head 610 can then polish the opening of the screw hole 114.

[0036] As a preferred embodiment, please refer to Figure 3 The lower end of the polishing head 610 has a conical structure, which facilitates polishing the opening of the screw hole 114.

[0037] As a preferred embodiment, please refer to Figure 3 and Figure 5The bearing platform 210 is rotatably connected to the frame 500, and the fixed end of the first rotation drive component 460 is fixedly connected to the frame 500.

[0038] To better understand this utility model, the following is combined with... Figure 1 - Figure 5 The working principle of the technical solution of this utility model will be described in detail below:

[0039] In use, the half-shaft 100 is placed on the bearing surface 211, and the first end face 111 of the flange 110 of the half-shaft 100 abuts against the bearing surface 211. During this process, it is also necessary to ensure that the boss 220 slides into the mating groove 113 of the flange 110, and that the upper ends of each of the positioning pins 310 slide into the corresponding screw holes 114 on the flange 110. Since the angle between the bearing surface 211 and the horizontal plane is equal to the angle between the first end face 111 and the second end face 112 of the flange 110 of the half-shaft 100, when the first end face 111 of the flange 110 abuts against the bearing surface 211, the highest point of the second end face 112 of the flange 110 will be a horizontal line, plus the screw holes 114. With a smaller diameter, when the screw hole 114 to be chamfered rotates to its highest position, the surface where the opening of the screw hole 114 to be chamfered is located will tend to be a horizontal plane, thereby achieving leveling of the inclined end of the screw hole 114 on the half shaft 100 of this structure before chamfering. When the grinding head is fed to the preset height, it can directly grind and polish each point of the screw hole 114 without constantly adjusting the feed height of the grinding head, which can improve the chamfering efficiency and chamfering accuracy. In the initial position, the screw hole 114 of one of the flanges 110 is in the highest position. At this time, since the arc-shaped wall of the limiting plate 450 abuts against the two adjacent docking shafts 420, the bearing platform 210 can be limited, and the bearing platform 210 cannot rotate, avoiding the half shaft 10 During the chamfering process of the screw hole 114 on the 0, the half shaft 100 rotates, ensuring the smooth chamfering. After the screw hole 114 is chamfered, by manipulating the first rotation drive 460, the output end of the first rotation drive 460 rotates, which can drive the rotating shaft 430 to rotate, and drive the half gear 440 and the limiting disk 450 to rotate. When the initial end of the half gear 440 meshes with the gear ring 410, the half gear 440 will drive the gear ring 410 to rotate. Since the starting end of the half gear 440 corresponds to the guide groove 451, when the gear ring 410 starts to rotate, the mating shaft 420 corresponding to the guide groove 451 will slide into the guide groove 451. Within groove 451, when the end of the half gear 440 separates from the gear ring 410, the gear ring 410 rotates through a preset angle. The mating shaft 420 within the guide groove 451 slides out of the guide groove 451, and the next threaded hole 114 on the flange 110 reaches its highest position. When a threaded hole 114 on the flange 110 reaches its highest position, by manipulating the telescopic drive 630, the output end of the telescopic drive 630 extends, driving the second rotation drive 620 to move downwards until the polishing head 610 reaches the opening of the threaded hole 114. Then, by manipulating the second rotation drive 620, the output end of the second rotation drive 620 rotates, driving the polishing head 610 to rotate.The polishing head 610 can polish the opening of the screw hole 114.

[0040] The automotive half-shaft positioning fixture and chamfering device provided by this utility model have the following beneficial effects:

[0041] (1) Since the angle between the bearing surface 211 and the horizontal plane is equal to the angle between the first end face 111 and the second end face 112 of the flange 110 of the half shaft 100, when the first end face 111 of the flange 110 abuts against the bearing surface 211, the highest position of the second end face 112 of the flange 110 will be a horizontal line. In addition, the diameter of the screw hole 114 is small. When the screw hole 114 to be chamfered is rotated to the highest position, the surface where the opening of the screw hole 114 to be chamfered is located will tend to be a horizontal plane, thereby realizing the leveling of the inclined end of the screw hole 114 on the half shaft 100 of this structure before chamfering.

[0042] (2) When the initial end of the half gear 440 meshes with the gear ring 410, the half gear 440 will drive the gear ring 410 to rotate. Since the starting end of the half gear 440 corresponds to the guide groove 451, when the gear ring 410 starts to rotate, the docking shaft 420 corresponding to the guide groove 451 will slide into the guide groove 451. When the ending end of the half gear 440 separates from the gear ring 410, the gear ring 410 rotates through a preset angle, and the docking shaft 420 in the guide groove 451 slides out of the guide groove 451. The next screw hole 114 on the flange 110 reaches the highest position, realizing intermittent driving of the bearing platform 210.

[0043] (3) Using this positioning fixture, the inclined end of the screw hole 114 on the half shaft 100 of this structure can be leveled before chamfering. When the grinding head is fed to the preset height, the screw hole 114 can be ground and polished directly without constantly adjusting the feed height of the grinding head, which can improve the chamfering efficiency and chamfering accuracy.

[0044] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A positioning fixture for an automobile half-shaft, characterized in that, include: The bearing mechanism includes a bearing platform and a boss. The top surface of the bearing platform forms a bearing surface. The bearing surface is inclined relative to the horizontal plane, and the angle between the bearing surface and the horizontal plane is equal to the angle between the first end face and the second end face of the flange of the half shaft. The boss is a columnar structure, and one end of the boss is fixedly connected to the bearing surface. The bearing surface is used to support the half shaft and to abut against the first end face of the flange. The other end of the boss is used to slide into the mating groove of the flange.

2. The automotive half-shaft positioning fixture according to claim 1, characterized in that, The support platform is a columnar structure and can rotate around its central axis. The boss is coaxial with the support platform.

3. The automotive half-shaft positioning fixture according to claim 1, characterized in that, It also includes a positioning mechanism, which is detachably connected to the flange of the bearing platform and the half shaft, and is used to limit the rotation of the half shaft.

4. The automotive half-shaft positioning fixture according to claim 3, characterized in that, The positioning mechanism includes multiple positioning pins, each of which is arranged circumferentially on the side of the boss and distributed in a ring array structure. The lower end of each positioning pin is detachably and fixedly connected to the bearing platform, and the upper end of each positioning pin is used to slide into the corresponding screw holes on the flange.

5. The automotive half-shaft positioning fixture according to claim 4, characterized in that, The support platform has multiple insertion holes, each of which is circumferentially located on the side of the boss and arranged in a ring array. The lower end of each positioning pin is slidably inserted into each insertion hole.

6. The automotive half-shaft positioning fixture according to claim 5, characterized in that, When the lower end of the locating pin is slidably inserted into the insertion hole, the distance from the top of the locating pin to the bearing surface is less than the depth of the screw hole.

7. The automotive half-shaft positioning fixture according to claim 2, characterized in that, It also includes a drive mechanism, which is connected to the support platform and is used to drive the support platform to rotate intermittently by a preset angle so that each screw hole on the flange reaches its highest position in sequence.

8. The automotive half-shaft positioning fixture according to claim 7, characterized in that, The driving mechanism includes a gear ring, multiple docking shafts, a rotating shaft, half gears, a limiting disk, and a first rotational driving component. The gear ring is fixedly sleeved on the outer wall of the bearing platform. Each docking shaft is circumferentially arranged on the side of the bearing platform and distributed in a ring array structure. The lower end of each docking shaft is fixedly connected to the gear ring. The rotating shaft is located on the side of the gear ring and extends axially along the bearing platform. The limiting disk is coaxially fixedly sleeved on the rotating shaft. The arc-shaped wall of the limiting disk abuts against two adjacent docking shafts. A guide groove is formed on the limiting disk for the docking shaft to slide into. The half gear is coaxially fixedly sleeved on the rotating shaft and is used to mesh or separate from the gear ring. The starting end of the half gear corresponds to the guide groove. The output end of the first rotational driving component is coaxially fixedly connected to one end of the rotating shaft and is used to drive the rotating shaft to rotate.

9. A chamfering device, characterized in that, The device includes a frame, multiple automotive half-shaft positioning fixtures and chamfering mechanisms as described in any one of claims 1-8, wherein the bearing platform is connected to the frame, and the chamfering mechanism is disposed above the bearing platform for chamfering the bolt holes of the flange rotated to the highest position.

10. The chamfering device according to claim 9, characterized in that, The chamfering mechanism includes a polishing head, a second rotating drive, and a telescopic drive. The polishing head corresponds to the highest screw hole. The output end of the second rotating drive is fixedly connected to the polishing head and is used to drive the polishing head to rotate so that the polishing head polishes the screw hole. The fixed end of the telescopic drive is connected to the frame, and the output end of the telescopic drive is fixedly connected to the second rotating drive and is used to drive the second rotating drive to move up and down to adjust the height of the polishing head.

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