A wheel hub machining positioning fixture

Abstract

This application relates to the field of fixture technology and provides a wheel hub machining positioning fixture, comprising: a mounting plate, wherein at least three guide posts are provided on the upper surface of the mounting plate, each guide post being located on the same circumference and on the outer circumference of the wheel hub, the wheel hub being located within the circumference enclosed by the guide posts; a moving part, wherein the moving part is located between the outer ring and the inner ring of the wheel hub, the moving part being located on one side of the outer ring, the inner ring, and the spoke, and sliding along the length direction of the outer ring, the inner ring, and the spoke; and a clamping member, wherein the clamping member is disposed on the moving part, the clamping member being used to press down on the wheel hub near the moving part. Based on this, it is possible to easily adjust the clamping position when machining different positions, reduce the amplitude during machining, improve machining accuracy, and the clamping member can also better avoid some machining positions on the wheel hub when clamping the wheel hub.

Description

Technical Field

[0001] This application relates to the field of fixture technology, and in particular to a positioning fixture for wheel hub machining. Background Technology

[0002] Currently, most bicycles are equipped with rims, and the outer perimeter of the rim is used to mount the tire. (See reference...) Figure 1 The wheel hub 1 shown typically includes an outer ring 101, an inner ring 102, and several spokes 103. The outer ring 101 and the inner ring 102 are coaxial and coplanar. The spokes 103 are fixed between the outer side of the inner ring 102 and the inner wall of the outer ring 101, and are used to connect the inner ring 102 and the outer ring 101. During the manufacturing process of wheel hubs, especially those made of carbon fiber, automated lathes are needed to grind the inner wall of the inner ring, machine holes around the inner ring, and grind certain parts of the spokes. Furthermore, during the wheel hub manufacturing process, fixtures are required to clamp and fix the wheel hub so that the lathe can machine it.

[0003] Chinese patent CN214444855U discloses a wheel hub clamp, including a base frame and a worktable, which are fixedly connected. At least one row of multiple wheel hub body end cap connection end positioning platforms and at least one row of multiple wheel hub body bearing connection end positioning platforms are evenly distributed on the worktable. A barrel-shaped connection end is provided on each wheel hub body end cap connection end positioning platform, cooperating with the wheel hub body end cap connection end. A positioning boss is provided on each wheel hub body bearing connection end positioning platform, cooperating with the wheel hub body bearing connection end. A lever clamping cylinder is provided on each worktable on both sides of each row of wheel hub body end cap connection end positioning platforms and each row of wheel hub body bearing connection end positioning platforms. A rotary clamping cylinder is provided at the middle position of each row of wheel hub body end cap connection end positioning platforms and each row of wheel hub body bearing connection end positioning platforms.

[0004] Regarding the aforementioned technologies, most fixtures clamp and fix the outer periphery of the wheel hub. However, there are multiple machining positions on the wheel hub, and some machining positions are located far from the clamping position of the fixture. However, the clamping position of the wheel hub is always kept on the outer periphery. Therefore, when the clamping position and the machining position are far apart, the wheel hub amplitude is large, which will affect the machining accuracy of the wheel hub. Summary of the Invention

[0005] In order to facilitate the adjustment of the clamping position when processing different positions, reduce the amplitude of vibration during processing, and improve the processing accuracy, this application provides a wheel hub processing positioning fixture.

[0006] The wheel hub machining positioning fixture provided in this application adopts the following technical solution:

[0007] A wheel hub machining positioning fixture includes: a mounting plate, on the upper surface of which at least three guide posts are provided, each guide post being located on the same circumference and on the outer circumference of the wheel hub, the wheel hub being located within the circumference enclosed by the guide posts; a movable part, located between the outer ring and the inner ring of the wheel hub, the movable part being located on one side of the outer ring, the inner ring, and the spoke, and sliding along the length direction of the outer ring, the inner ring, and the spoke; and a clamping member, disposed on the movable part, the clamping member being used to press down on the wheel hub near the movable part.

[0008] By adopting the above technical solution, when fixing the wheel hub, the wheel hub is placed horizontally on the mounting plate. At this time, the wheel hub is located within the circumference formed by the guide pillars, and the guide pillars can limit the horizontal movement of the wheel hub. Then, depending on the different positions of the wheel hub that need to be processed, the clamping parts can be directly pushed. The moving part can drive the clamping parts to slide along one side close to each part of the wheel hub, so that the clamping parts are close to the position to be processed. Then, the wheel hub is pressed down on the mounting plate. Since the pressing position is close to the processing part, the source of amplitude generation can be directly suppressed, thereby reducing the amplitude generated during processing. Moreover, when selecting the pressing position, it is also possible to better avoid some positions on the wheel hub that need to be processed, ensuring the processing of each part of the wheel hub. This achieves the effect of facilitating the adjustment of the clamping position when processing different positions, reducing the amplitude during processing, and improving the processing accuracy.

[0009] Preferably, the upper surface of the mounting plate is provided with a groove, the groove is provided along the length direction of the strip, the outer ring and the inner ring, the groove is located between the inner ring and the outer ring, the moving part is a retaining bead, the retaining bead is embedded and slidably connected in the groove, and the retaining bead slides along the length direction of the groove.

[0010] By adopting the above technical solution, the groove can limit the movement of the retaining ball, allowing the retaining ball to slide along the extension direction of the groove, thereby enabling the moving part to drive the clamping part to slide.

[0011] Preferably, the clamping member includes a connecting part, a pressure block, a screw, and a clamping nut. The connecting part is fixed to the retaining bead, the screw is vertically fixed to the connecting part, the pressure block is sleeved on the screw, the clamping nut is threaded to the screw and presses against the upper surface of the pressure block, and the pressure block presses against the upper end face of the wheel hub.

[0012] By adopting the above technical solution, when the clamping component needs to be clamped, the pressure block can be rotated so that the pressure block is directly above the wheel hub clamping component position and presses down on the wheel hub. Then, the clamping nut is rotated to push the pressure block to press stably on the upper end face of the wheel hub, thereby achieving the clamping and fixing of the wheel hub in the height direction by the clamping component.

[0013] Preferably, the connecting part is provided with a first reset member, one end of the first reset member is connected to the pressure block, and the first reset member is used to drive the pressure block to rotate in a direction away from the top of the wheel hub.

[0014] By adopting the above technical solution, since each pressure block can rotate around the screw, when the wheel hub is horizontally placed on the upper surface of the mounting plate, especially if the rotation direction of each pressure block is inconsistent and they have not rotated away from the wheel hub clamping position, the wheel hub may come into contact with the pressure block, causing the pressure block to not be able to directly adhere to the upper surface of the mounting plate, so adjustment is required; however, with the first reset component, when the clamping nut does not press the pressure block against the upper surface of the wheel hub, the first reset component can pull each pressure block away from directly above the clamping position of the wheel hub, ensuring that the wheel hub is not easily affected by the interference of the pressure block when it is placed on the upper surface of the mounting plate.

[0015] Preferably, a second reset member is sleeved on the screw, and the lower surface of the pressure block abuts against the upper end of the second reset member. The second reset member is always compressed. When the second reset member only bears the weight of the pressure block, the pressure block is higher than the upper end surface of the hub.

[0016] By adopting the above technical solution, the second reset member can push the pressure block upward. When the second reset member only bears the weight of the pressure block, it ensures that the height of the pressure block is greater than the upper end face of the hub when it is attached to the mounting plate. Therefore, when the pressure block is rotated horizontally to directly above the hub, the pressure block is reduced from hitting the hub.

[0017] Preferably, the connecting part is provided with a limiting part. When the pressure block rotates to a position that is vertically opposite to the wheel hub, the pressure block gradually approaches the limiting part and abuts against the limiting part on one side. The connecting part is provided with a plug at a position below the pressure block. When the pressure block abuts against the limiting part and gradually moves downward to press the wheel hub, the plug passes through the pressure block. When the clamping nut rotates and the pressure block moves upward, the pressure block gradually moves away from the plug.

[0018] By adopting the above technical solution, when the pressure block is pressed against the upper end face of the hub by the clamping nut, the pressure block will be pulled by the first reset member, causing the pressure block to have a tendency to rotate in a direction away from the top of the hub. Therefore, when the clamping nut presses the pressure block down, it rotates the pressure block to the top of the hub and makes one side of the pressure block contact the limiting part. Then the clamping nut gradually presses the pressure block down, and at this time the insert gradually passes through the pressure block, thus restricting the pressure block from rotating in the horizontal direction and keeping the pressure block stable. Moreover, when the clamping nut rotates upward, the pressure block is first gradually pushed upward by the second reset member. When the insert separates from the pressure block, the pressure block is pulled away from the top of the hub by the first reset member, making it easy for the hub to be directly removed upward.

[0019] Preferably, a support portion is provided on the outer side of the connecting portion, and the lower end of the support portion abuts against the upper surface of the mounting plate.

[0020] By adopting the above technical solution, since the retaining ball is embedded in the groove, it may roll and cause the clamping member to tip over. The supporting part can support the connecting part, so the retaining ball will not roll in the groove, and the clamping member remains stable.

[0021] Preferably, the groove has an arc-shaped transition at the corner near the connection between the strip and the inner ring, and between the strip and the outer ring.

[0022] By adopting the above technical solution, since the groove extends along the length of the banner, inner ring, and outer ring, there are corners at the connection points between the banner and the inner ring, and between the banner and the outer ring. When the ball moves in the groove, especially when it passes the corner, the arc-shaped transition groove can facilitate the smooth sliding of the ball through the corner of the groove.

[0023] Preferably, the upper surface of the mounting plate is provided with a guide groove communicating with the groove, and one end of the guide groove extends to the peripheral sidewall of the mounting plate.

[0024] By adopting the above technical solution, since coolant may accumulate in the groove formed by the upper surface of the mounting plate, the inner ring and the outer ring during processing, the coolant in the groove can be discharged from the periphery of the mounting plate in a timely manner through the guide groove. At the same time, it is also convenient for the ball to enter the guide groove from the outer periphery of the mounting plate and then enter the slot.

[0025] Preferably, the clamping element includes a quick clamp disposed on the locking bead.

[0026] By adopting the above technical solution, the placed wheel hub can be quickly clamped and fixed using a quick clamp.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] (1) By setting up the cooperation between the mounting plate, the moving part and the clamping part, the clamping part can be slid to one side of each part of the hub along with the moving part, thereby adjusting the clamping position of the clamping part to be close to the processing position, while avoiding the processing position, so as to facilitate the adjustment of the clamping position when processing different positions, reduce the amplitude during processing, and improve the processing accuracy.

[0029] (2) By setting the first reset component, each pressure block can be automatically rotated and adjusted to a position away from the clamping hub when it is not in use, reducing the interference of the pressure block when the hub is placed on the upper surface of the mounting plate; and through the cooperation between the second reset component, the limiting part and the insert, the rotation of the pressure block can be restricted, reducing the pulling force of the first reset component on the pressure block, so that the pressure block remains stable when clamping the hub. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the wheel hub structure in this embodiment;

[0031] Figure 2 This is a schematic diagram of the positioning fixture in this embodiment when a wheel hub is placed on it;

[0032] Figure 3 This is a schematic diagram of the positioning fixture after the wheel hub is hidden in this embodiment;

[0033] Figure 4 yes Figure 3 Enlarged view of part A in the middle section;

[0034] Figure 5 This is a schematic diagram of another clamping component structure in this embodiment;

[0035] Figure 6 This is a schematic diagram of the clamping component in this embodiment.

[0036] Reference numerals: 1. Hub; 101. Outer ring; 102. Inner ring; 103. Spoke; 2. Mounting plate; 3. Moving part; 31. Clamping ball; 4. Clamping element; 41. Connecting part; 42. Pressure block; 43. Screw; 44. Pressure nut; 45. Quick clamp; 5. Guide post; 6. Slot; 7. First reset element; 8. Second reset element; 9. Limiting part; 10. Insert post; 11. Insertion hole; 12. Support part; 13. Guide groove. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0038] This application discloses a positioning fixture for wheel hub machining. (Refer to...) Figure 2 and Figure 3 The positioning fixture includes a mounting plate 2, a movable part 3, and a clamping member 4. The movable part 3 is slidably connected to the upper surface of the mounting plate 2 and slides along one side of the hub 1. The clamping member 4 is disposed at the upper end of the movable part 3.

[0039] At least three guide posts 5 are vertically fixed on the upper surface of the mounting plate 2. Each guide post 5 is located on the same circumference and on the outer circumference of the hub 1. The hub 1 is located within the circumference enclosed by the guide posts 5. In this embodiment, three guide posts 5 are provided. Each guide post 5 is evenly spaced around the circumference of the hub 1. The guide posts 5 can abut against at least three positions on the outside of the hub 1 to restrict the horizontal movement of the hub 1 and keep the hub 1 stable in the horizontal direction.

[0040] Reference Figure 2 and Figure 4The movable part 3 is located between the closed grooves formed by the outer ring 101, inner ring 102, and spokes 103 of the hub 1. The hub 1 processed in this embodiment has three spokes 103, thus forming three closed grooves. A movable part 3 is slidably connected in each groove. The number of movable parts 3 and clamping parts 4 is the same. The movable part 3 is located on one side of the outer ring 101, inner ring 102, and spokes 103 and slides along the length direction of the outer ring 101, inner ring 102, and spokes 103. Therefore, the movable part 3 can drive the clamping parts 4 to move along one side of the spokes 103, inner ring 102, and outer ring 101 around each groove, thereby moving the clamping parts 4 closer to the position to be processed. Then, the clamping parts 4 press the hub 1 down against the mounting plate 2, which can directly suppress the source of amplitude generation, thereby reducing the amplitude generated during processing; it can also better avoid some positions on the hub 1 that need to be processed.

[0041] The mounting plate 2 has a groove 6 on its upper surface. The groove 6 is located between the inner ring 102 and the outer ring 101. The groove 6 is arranged along the length direction of the strip 103, the outer ring 101 and the inner ring 102. In this embodiment, each closed groove has a continuous groove 6 near the hub 1. The vertical cross-section of the groove 6 is a shape with a diameter greater than half a circle. The moving part 3 is a retaining bead 31. The retaining bead 31 is embedded and slidably connected in the groove 6. The retaining bead 31 is spherical. The upper part of the retaining bead 31, less than half of its upper part, extends out of the groove opening of the groove 6. That is, a part of the upper part of the retaining bead 31 protrudes from the upper surface of the mounting plate 2. The groove 6 can restrict the movement of the retaining bead 31 in the height direction, so that the retaining bead 31 is stable in the groove 6 and slides along the length direction of the groove 6.

[0042] Since the groove 6 extends along the length of the strip 103, inner ring 102, and outer ring 101, and the connection between the strip 103 and the inner ring 102 and the strip 103 and the outer ring 101 has a corner, the groove 6 near the corner of the connection between the strip 103 and the inner ring 102 and the strip 103 and the outer ring 101 has an arc transition, ensuring that the locking bead 31 can slide smoothly at the corner of the groove 6.

[0043] The clamping component 4 includes a connecting part 41, a pressure block 42, a screw 43, and a clamping nut 44. The connecting part 41 is plate-shaped and positioned below the upper end of the hub 1. The lower end of the connecting part 41 has a threaded portion, which is threadedly connected and fixed to the upper end of the retaining ball 31. The screw 43 is vertically fixed to the upper surface of the connecting part 41. The pressure block 42 is strip-shaped and one end is directly sleeved on the screw 43. The pressure block 42 can rotate horizontally around the screw 43. The clamping nut 44 is threadedly connected to the screw 43 and presses against the upper surface of the pressure block 42. The pressure block 42 presses against the upper end of the hub 1 near the moving part 3, thereby fixing the hub 1 with the clamping component 4.

[0044] Reference Figure 2 and Figure 5 In some embodiments, the clamping member 4 includes a quick clamp 45 fixed to the upper end of the locking bead 31. The quick clamp 45 is in the prior art and will not be described in detail here. The wheel hub 1 can also be quickly pressed down and clamped by the quick clamp 45.

[0045] Reference Figure 4 and Figure 6 A first reset member 7 is fixed on the upper surface of the connecting part 41. The first reset member 7 is selected as a spring or elastic rope. The first reset member 7 is inclined in the height direction. One end of the first reset member 7 is connected to the side of the pressure block 42. The first reset member 7 is used to drive the pressure block 42 to rotate away from the top of the wheel hub 1. When the pressure block 42 presses down on the wheel hub 1, the pressure block 42 needs to rotate to a position where one end is directly above the wheel hub 1. When the clamping nut 44 releases the clamping of the pressure block 42, the restoring force of the first reset member 7 can drive the pressure block 42 to rotate away from the top of the wheel hub 1. At this time, it is convenient for the wheel hub 1 to be lifted directly upward from the upper surface of the mounting plate 2. Moreover, the first reset member 7 can uniformly adjust the position of each pressure plate that is not in a clamped state, so that there will be no interference caused by the pressure block 42 being in an arbitrary free rotation position. Therefore, when the wheel hub 1 is placed on the upper surface of the mounting plate 2, it is not easily interfered by each pressure plate, which facilitates the quick placement of the wheel hub 1 before clamping.

[0046] The screw 43 is fitted with a second reset member 8, which is selected as an elastic sleeve or a spring. The lower surface of the pressure block 42 abuts against the upper end of the second reset member 8, and the second reset member 8 is always compressed. When the second reset member 8 only bears the gravity from the pressure block 42, the pressure block 42 is higher than the upper end surface of the hub 1. Therefore, before the pressure block 42 is pressed, one end of the pressure block 42 can be directly rotated horizontally to the top of the hub 1.

[0047] A limiting part 9 is vertically fixed on the upper surface of the connecting part 41. The limiting part 9 is columnar, and its upper end is higher than the highest position of the pressure block 42. The connecting part 41 is located on the rotation path of the pressure block 42. When the pressure block 42 rotates to a position that is vertically opposite to the hub 1, the pressure block 42 gradually approaches the limiting part 9 and one side abuts against the side wall of the limiting part 9 to limit the pressure block 42 from continuing to rotate. A post 10 is fixed on the upper surface of the connecting part 41 and below the pressure block 42. The upper end of the post 10 is hemispherical. The pressure block 42 has a socket 11 opposite to the insertion post 10. When the pressure block 42 abuts against the limiting part 9 and gradually moves downward to press the hub 1, the insertion post 10 and the socket 11 are vertically opposite each other, and the insertion post 10 is gradually inserted into the socket 11 of the pressure block 42. When the clamping member 4 releases the pressure on the hub 1, the clamping nut 44 rotates and the pressure block 42 moves upward. The second reset member 8 pushes the pressure block 42 upward, so that the insertion post 10 gradually leaves the socket 11. Finally, the first reset member 7 drives the pressure block 42 to rotate away from directly above the hub 1.

[0048] When the pressure block 42 is pressed against the upper surface of the hub 1 by the clamping nut 44, the pressure block 42 is subjected to the pulling force of the first reset member 7, causing the pressure block 42 to tend to rotate away from the direction directly above the hub 1, resulting in poor clamping stability of the pressure block 42. However, when the clamping nut 44 presses the pressure block 42 downward, the insert 10 is inserted into the through hole, so the insert 10 can restrict the rotation of the pressure block 42 in the horizontal direction, so that the pressure block 42 remains stable in the clamping position, reducing the influence of the first reset member 7 on the clamping of the pressure block 42.

[0049] In some embodiments, a support portion 12 is vertically fixed to the lower outer surface of the connecting portion 41, and the lower end of the support portion 12 abuts against the upper surface of the mounting plate 2. Since the locking bead 31 is embedded in the groove 6, it may roll, causing the clamping member 4 to tip over. The support portion 12 can support the connecting portion 41, so the locking bead 31 will not roll in the groove 6, and the clamping member 4 remains stable in the vertical direction.

[0050] In some embodiments, refer to Figure 2 A guide groove 13 communicating with each slot 6 is provided on the upper surface of the mounting plate 2. The vertical cross-section of the guide groove 13 is the same as that of the slot 6, and one end of the guide groove 13 extends to the peripheral side wall of the mounting plate 2. During processing, coolant may accumulate in the closed groove formed by the hub 1 on the upper surface of the mounting plate 2. The guide groove 13 can promptly discharge the coolant in the groove from the periphery of the mounting plate 2. It also facilitates the entry of the retaining ball 31 from the outer periphery of the mounting plate 2 into the guide groove 13 and then into the slot 6, which is convenient for the installation of the retaining ball 31.

[0051] The implementation principle of a wheel hub processing positioning fixture according to an embodiment of this application is as follows: During clamping, the wheel hub 1 is placed horizontally on the upper surface of the mounting plate 2, so that the wheel hub 1 is located within the area enclosed by each guide post 5, thereby limiting the horizontal movement of the wheel hub 1; and the spokes 103 are located between two adjacent grooves 6. Then, the clamping member 4 and the moving part 3 can be moved directly. The moving part 3 can slide within the groove 6, causing the clamping member 4 to slide on one side of each part of the wheel hub 1, so that the clamping member 4 can approach the position of the wheel hub 1 that needs to be processed; then, the pressure block 42 is rotated so that one side of the pressure block 42 is aligned with the limiting position. When part 9 contacts, one end of the pressure block 42 is directly above the hub 1. Then, the clamping nut 44 is rotated to press the pressure block 42 downward, so that the pressure block 42 presses the hub 1, and the insertion post 10 can pass through the insertion hole 11, thereby restricting the horizontal rotation of the pressure block 42, ensuring the stability of the pressure block 42, directly suppressing the source of amplitude generation, thereby reducing the amplitude generated during processing, making it easier to adjust the clamping position when processing different positions, reducing the amplitude during processing, and improving the processing accuracy. When clamping the hub 1, the clamping part 4 can also better avoid some positions on the hub 1 that need to be processed.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A positioning fixture for wheel hub processing, characterized in that, include: Mounting plate (2), the upper surface of which is provided with at least three guide posts (5), each guide post (5) is located on the same circumference, and the guide post (5) is located on the outer circumference of the hub (1), and the hub (1) is located within the circumference enclosed by each guide post (5); The movable part (3) is located between the outer ring (101) and the inner ring (102) of the hub (1). The movable part (3) is located on one side of the outer ring (101), the inner ring (102) and the spoke (103) and slides along the length direction of the outer ring (101), the inner ring (102) and the spoke (103); Clamping member (4), the clamping member (4) is disposed on the moving part (3), the clamping member (4) is used to press down on the hub (1) near the moving part (3); The mounting plate (2) has a groove (6) on its upper surface. The groove (6) is arranged along the length direction of the strip (103), the outer ring (101) and the inner ring (102). The groove (6) is located between the inner ring (102) and the outer ring (101). The moving part (3) is a retaining bead (31). The retaining bead (31) is embedded and slidably connected in the groove (6). The retaining bead (31) slides along the length direction of the groove (6). The clamping member (4) includes a connecting part (41), a pressure block (42), a screw (43) and a clamping nut (44). The connecting part (41) is fixed to the retaining bead (31). The screw (43) is vertically fixed to the connecting part (41). The pressure block (42) is sleeved on the screw (43). The clamping nut (44) is threaded to the screw (43) and presses against the upper surface of the pressure block (42). The pressure block (42) presses against the upper end face of the hub (1).

2. The wheel hub machining positioning fixture according to claim 1, characterized in that, The connecting part (41) is provided with a first reset member (7), one end of the first reset member (7) is connected to the pressure block (42), and the first reset member (7) is used to drive the pressure block (42) to rotate in a direction away from the hub (1).

3. A wheel hub machining positioning fixture according to claim 2, characterized in that, The screw (43) is fitted with a second reset member (8), and the lower surface of the pressure block (42) abuts against the upper end of the second reset member (8). The second reset member (8) is always compressed. When the second reset member (8) only bears the weight of the pressure block (42), the pressure block (42) is higher than the upper end face of the hub (1).

4. A wheel hub machining positioning fixture according to claim 3, characterized in that, The connecting part (41) is provided with a limiting part (9). When the pressure block (42) rotates to a position that is vertically opposite to the hub (1), the pressure block (42) gradually approaches the limiting part (9) and one side abuts against the limiting part (9). The connecting part (41) is provided with a plug (10) located below the pressure block (42). When the pressure block (42) abuts against the limiting part (9) and gradually moves downward to press the hub (1), the plug (10) passes through the pressure block (42). When the clamping nut (44) rotates and the pressure block (42) moves upward, the pressure block (42) gradually moves away from the plug (10).

5. A wheel hub machining positioning fixture according to claim 1, characterized in that, A support portion (12) is provided on the outside of the connecting portion (41), and the lower end of the support portion (12) abuts against the upper surface of the mounting plate (2).

6. A wheel hub machining positioning fixture according to claim 1, characterized in that, The groove (6) has an arc-shaped transition at the corner near the connection between the banner (103) and the inner ring (102) and the banner (103) and the outer ring (101).

7. A wheel hub machining positioning fixture according to claim 1, characterized in that, The upper surface of the mounting plate (2) is provided with a guide groove (13) that communicates with the groove (6), and one end of the guide groove (13) extends to the peripheral sidewall of the mounting plate (2).

Images