A positioning tool for automobile wheel hub processing

Abstract

The present invention relates to the technical field of automobile wheel hub processing, and specifically to a positioning tool for automobile wheel hub processing, comprising support legs and a positioning platform, wherein a plurality of support legs are fixed to the lower surface of the positioning platform, at least four positioning clamps are slidably provided on the upper surface of the outer ring of the positioning platform, and at least four positioning clamps are also slidably provided at the center position of the upper surface of the positioning platform, each positioning clamp is aligned with the positioning clamp, and a synchronous adjustment mechanism is provided inside the positioning platform, and the synchronous adjustment mechanism is used to synchronously adjust and move each group of mutually symmetrical positioning clamps and positioning clamps, so as to facilitate the synchronous clamping and positioning of the wheel hub on the positioning platform by multiple groups of symmetrical positioning clamps and positioning clamps, and effectively reduce the phenomenon that the wheel hub is offset or tilted when it is clamped and positioned by multiple positioning clamps that cannot move simultaneously, thereby affecting the quality and efficiency of subsequent processing of the wheel hub.

Description

Technical Field

[0001] The invention relates to the technical field of automobile wheel hub processing, in particular to a positioning tool for automobile wheel hub processing. Background Art

[0002] The wheel hub is an important part of the auto parts, and the wheel hub is also called the wheel rim. According to the characteristics and requirements of different models, the wheel hub surface treatment process will also take different ways.

[0003] When the semi-finished automobile wheel hub needs to be placed on the positioning tooling and clamped in position for subsequent processing such as welding, grinding, and polishing, the automobile wheel hub must be accurately clamped and positioned. If there is deviation or tilt, the automobile wheel hub will inevitably be scrapped or of substandard quality during subsequent processing.

[0004] However, the existing tooling for clamping and positioning the automobile wheel hub is mostly manually operated or uses multiple independent cylinders or hydraulic cylinders to individually drive multiple positioning clamps, so that multiple positioning clamps individually clamp and position the automobile wheel hub. This operation method not only causes the phenomenon of uneven clamping force of the automobile wheel hub, but also causes deviation during positioning, thereby affecting the quality of subsequent processing of the automobile wheel hub. Summary of the invention

[0005] The purpose of the present invention is to provide a positioning tool for automobile wheel hub processing to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning tool for automobile wheel hub processing, comprising support legs and a positioning table, a plurality of support legs are fixed to the lower surface of the positioning table, at least four positioning clamps are slidably provided on the upper surface of the outer ring of the positioning table, and at least four positioning clamps are also slidably provided at the center position of the upper surface of the positioning table, each of the positioning clamps and the positioning clamps are aligned with each other, and a synchronous adjustment mechanism is arranged inside the positioning table, and the synchronous adjustment mechanism is used to synchronously adjust and move each group of mutually symmetrical positioning clamps and positioning clamps, so as to facilitate multiple groups of symmetrical positioning clamps and positioning clamps to synchronously clamp and position the wheel hub on the positioning table.

[0007] Furthermore, the synchronous adjustment mechanism includes a guide slider, a moving block, a bidirectional spiral screw, a first bevel gear and a second bevel gear. An installation cavity is provided inside the positioning platform, and at least four guide slots are provided on the surface of the positioning platform, and each guide slot is evenly connected to the installation cavity. A guide slider is fixed to the lower surface of each positioning clamp block and the positioning clamp plate, and the guide slider is slidably arranged in the guide slot. A moving block is fixed to the bottom end surface of each guide slider, and the moving block is slidably arranged in the installation cavity. Two mutually symmetrical moving blocks are rotatably connected to the bidirectional spiral screw through a nut pair, one end of at least four of the bidirectional spiral screws are rotatably installed on the side wall of the installation cavity, and the other end thereof is fixed with a first bevel gear, and at least four of the first bevel gears are meshed with the same second bevel gear for transmission, and the second bevel gear is connected to the output shaft of a motor fixed at the center position of the rotating cavity through a rotating shaft.

[0008] Furthermore, the cross section of the positioning clamp block is an L-shaped structure, and the surface of the positioning clamp block of the L-shaped structure is provided with a rubber layer.

[0009] Furthermore, a support pad is fixed below the outer ring surface of the positioning clamp, and a rubber layer is also provided on the outer surface of the support pad and the positioning clamp. The thickness of the support pad is the same as the thickness of the horizontal cross block of the positioning clamp.

[0010] Furthermore, a telescopic positioning mechanism is provided on the support pad, and the telescopic positioning mechanism includes a positioning pin, a sealing slider, an elastic hose, an electromagnetic suction block and an elastic conduit. A positioning groove is provided on the upper surface of the support pad, and a positioning pin is inserted in the positioning groove for sealing and sliding through the sealing slider. The bottom end of the sealing slider is connected to the bottom end surface of the positioning groove through a spring. The top ends of at least four of the elastic hoses are fixed to the inner wall of the mounting cavity, and the bottom end of each elastic hose is magnetically adsorbed to the upper surface of the second bevel gear after the electromagnetic suction block is energized, and the elastic hose is connected to the inside of the bottom end of the positioning groove through the elastic conduit.

[0011] Furthermore, the diameter of the locating pin is smaller than the diameter of the nut hole on the wheel hub, and the outer wall of the locating pin is sealed with an elastic rubber film, and the elastic rubber film and the locating pin are arranged in a non-contact manner.

[0012] Furthermore, a limited sliding cavity is provided inside the positioning pin, and a positioning sliding tube is slidably inserted in the limited sliding cavity, and the positioning sliding tube passes through the sealing slider and is connected to the bottom end surface of the positioning sliding groove.

[0013] Furthermore, an air guide hole is opened on the outer ring surface of the upper end of the positioning slide tube, and the air guide hole is slidably connected to the limiting slide cavity and the positioning slide groove. A plurality of expansion holes are evenly opened on the outer wall of the positioning pin, and the plurality of expansion holes are connected to the limiting slide cavity.

[0014] Furthermore, at least four support legs are provided, and a support pad is welded and fixed to the lower surface of each support leg, and a bolt hole is opened on the support pad.

[0015] Furthermore, the lower surface of each supporting pad is coated with an anti-rust layer.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention arranges multiple groups of mutually symmetrical positioning clamps and positioning clamps on the positioning table, and at least four groups of mutually symmetrical positioning clamps and positioning clamps are moved and adjusted by a synchronous adjustment mechanism. Since at least four positioning clamps and positioning clamps move synchronously, at least four positioning clamps are located on the same outer ring surface, and at least four positioning clamps are located on the same inner ring surface. The wheel hub is then placed between the positioning clamps and the positioning clamps, and the synchronous adjustment mechanism is then slowly driven to allow multiple positioning clamps and multiple positioning clamps to be synchronously clamped and fitted between the outer ring surface and the inner ring surface of the wheel hub, so that the multiple positioning clamps located on the outer ring surface and the multiple positioning clamps located on the inner ring surface can synchronously clamp and position the wheel hub, effectively reducing the phenomenon of the wheel hub being offset or tilted when multiple positioning clamps that cannot move simultaneously are clamped and positioned, thereby affecting the quality and efficiency of subsequent processing of the wheel hub.

[0018] 2. The present invention provides a slidable positioning pin on the support pad, and the outer wall of the positioning pin is wrapped with an elastic rubber film. When the second bevel gear continues to rotate, the multiple elastic hoses will be torsionally deformed, so that the air inside the multiple elastic hoses enters the positioning groove through the elastic conduit, and then pushes the positioning pin to slide upward and extend to the upper surface of the support pad. The positioning pin extending from the upper surface of the support pad will be inserted into the nut hole opened on the inner ring surface of the wheel hub. At the same time, the elastic rubber film can expand in the nut hole, so that the expanded elastic rubber can be filled in the nut hole, and then the multiple positioning pins can cooperate with the positioning clamp block and the positioning clamp plate to achieve a secondary clamping and positioning effect on the wheel hub. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 is a cross-sectional view of a positioning platform of the present invention;

[0021] Figure 3 It is an assembly diagram of the synchronous adjustment mechanism, the positioning clamp block and the positioning clamp plate of the present invention;

[0022] Figure 4 A cross-sectional view showing the meshing of the first bevel gear and the second bevel gear of the present invention;

[0023] Figure 5 For the present invention Figure 4 A partial enlarged view of the middle part;

[0024] Figure 6 For the present invention Figure 4 A partial enlarged view of point B in the middle.

[0025] In the figure: 1. support leg; 2. positioning platform; 21. installation cavity; 22. guide slide; 3. positioning clamp block; 4. positioning clamp plate; 41. support pad; 42. positioning slide; 5. synchronous adjustment mechanism; 51. guide slider; 52. moving block; 53. bidirectional spiral screw; 54. first bevel gear; 55. second bevel gear; 6. telescopic positioning mechanism; 61. positioning pin; 611. limit slide cavity; 612. expansion hole; 62. sealing slider; 63. elastic hose; 64. electromagnetic suction block; 65. elastic conduit; 7. elastic rubber membrane; 8. positioning slide tube; 81. air guide hole; 9. support pad. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] like Figures 1 to 6As shown, the present invention provides a technical solution for positioning tooling for automobile wheel hub processing: it includes a support leg 1 and a positioning platform 2, a plurality of support legs 1 are fixed to the lower surface of the positioning platform 2, at least four positioning clamps 3 are slidably arranged on the upper surface of the outer ring of the positioning platform 2, and at least four positioning clamps 4 are also slidably arranged at the center position of the upper surface of the positioning platform 2, each of the positioning clamps 3 and the positioning clamps 4 are aligned with each other, and a synchronous adjustment mechanism 5 is arranged inside the positioning platform 2, and the synchronous adjustment mechanism 5 is used to synchronously adjust and move each group of mutually symmetrical positioning clamps 3 and positioning clamps 4, so as to facilitate the positioning of multiple groups of symmetrical positioning clamps 3 and positioning clamps 4. The positioning clamping plate 4 synchronously clamps and positions the wheel hub on the positioning table 2; during operation, when the semi-finished automobile wheel hub needs to be placed on the positioning tooling for clamping and positioning for subsequent processing such as welding, grinding, and polishing, the automobile wheel hub must be accurately clamped and positioned. If there is a deviation or tilt, the automobile wheel hub will inevitably be scrapped or of substandard quality during subsequent processing. The existing tooling for clamping and positioning the automobile wheel hub is mostly manually operated or uses multiple independent cylinders or hydraulic cylinders to drive multiple positioning clamps 3 separately, so that multiple positioning clamps 3 clamp and position the automobile wheel hub separately. The operation is convenient at this point. The above method will not only cause the phenomenon of uneven clamping force of the automobile wheel hub, but also cause deviation during positioning, thereby affecting the quality of subsequent processing of the automobile wheel hub; therefore, when it is necessary to use the positioning tooling designed by the present invention to clamp and position the automobile wheel hub, the operator first moves at least four groups of mutually symmetrical positioning clamps 3 and positioning clamping plates 4 in a direction close to each other according to the maximum outer ring size of the wheel hub, and then uses the synchronous adjustment mechanism 5 to simultaneously move at least four groups of mutually symmetrical positioning clamps 3 and positioning clamping plates 4 in a direction close to each other, thereby shortening the distance between the positioning clamps 3 and the positioning clamping plates 4. Since at least four positioning clamps 3 and positioning clamping plates 4 move synchronously, at least four positioning clamps 3 are on the same outer ring surface, at least four positioning clamps 4 are on the same inner ring surface, and then the wheel hub is placed between the positioning clamps 3 and the positioning clamps 4, and then the synchronous adjustment mechanism 5 is slowly driven to enable the multiple positioning clamps 3 and the multiple positioning clamps 4 to be synchronously clamped and fitted between the outer ring surface and the inner ring surface of the wheel hub, so that the multiple positioning clamps 3 located on the outer ring surface and the multiple positioning clamps 4 located on the inner ring surface can synchronously clamp and position the wheel hub, effectively reducing the phenomenon of the wheel hub being offset or tilted when the multiple positioning clamps 3 that cannot move simultaneously are clamped and positioned, thereby affecting the quality and efficiency of subsequent processing of the wheel hub.

[0029] like Figures 1 to 3As shown, the synchronous adjustment mechanism 5 includes a guide slider 51, a moving block 52, a bidirectional spiral screw 53, a first bevel gear 54 and a second bevel gear 55. The positioning platform 2 is provided with a mounting cavity 21, and the surface of the positioning platform 2 is provided with at least four guide slots 22, and each guide slot 22 is evenly connected to the mounting cavity 21. The lower surface of each positioning clamp 3 and the positioning clamp plate 4 is fixed with a guide slider 51, and the guide slider 51 is slidably set in the guide slot 22. The bottom end surface of each guide slider 51 is fixed with a moving block 52, and the moving block 52 is slidably set in the mounting cavity 21. The two mutually symmetrical moving blocks 52 are connected by The nut pair is rotatably connected to the bidirectional spiral screw 53, one end of at least four of the bidirectional spiral screws 53 are rotatably mounted on the side wall of the mounting cavity 21, and a first bevel gear 54 is fixed to the other end thereof, at least four of the first bevel gears 54 are meshed with the same second bevel gear 55 for transmission, and the second bevel gear 55 is connected to the motor output shaft fixed at the center position of the rotating cavity through a rotating shaft; during operation, when multiple sets of mutually symmetrical positioning clamps 3 and positioning clamps 4 are required to move synchronously in opposite directions, the operator controls the motor fixed inside the positioning table 2 through the control panel on the positioning fixture, and the output rotation of the motor drives the second bevel gear through the rotating shaft. 55 rotates, at this time the second bevel gear 55 will drive at least four first bevel gears 54 to rotate synchronously, thereby realizing at least four bidirectional spiral screws 53 to rotate synchronously in the installation cavity 21, and the rotation of the bidirectional spiral screw 53 drives the symmetrical moving blocks 52 meshed by the nut pair to move in opposite directions, so that the positioning clamping block 3 and the positioning clamping plate 4 can be driven to move close to each other at the same time through the guide slider 51, and the guide slider 51 slides in the guide slide groove 22, which can play a role of limiting the sliding of at least four groups of positioning clamping blocks 3 and positioning clamping plates 4, preventing the positioning clamping blocks 3 and positioning clamping plates 4 from deviating when sliding, thereby realizing at least four groups of symmetrical positioning clamping blocks 3 and positioning clamping plates The positioning clamping plate 4 is synchronously clamped and fitted between the outer ring surface and the inner ring surface of the wheel hub to achieve accurate clamping and positioning of the wheel hub; when the wheel hub needs to be removed from the positioning fixture after subsequent processing on the positioning fixture is completed, the operator controls the motor to rotate in the opposite direction through the control panel, so that the second bevel gear 55 can drive the multiple bidirectional spiral screws 53 to rotate in the opposite direction by meshing with at least four first bevel gears 54, and then synchronously drive and disengage at least four groups of symmetrical positioning clamps 3 and positioning clamping plates 4 clamped on the outer ring surface and inner ring wall of the wheel hub, so as to facilitate the quick and safe removal of the wheel hub from the positioning table 2 and replace it with the next wheel hub to be processed for processing.

[0030] like Figures 2 to 4As shown, the cross section of the positioning clamp block 3 is an L-shaped structure, and the surface of the positioning clamp block 3 of the L-shaped structure is provided with a rubber layer, a support pad 41 is fixed below the outer ring surface of the positioning clamp plate 4, and the outer surface of the support pad 41 and the positioning clamp plate 4 are also provided with a rubber layer, and the thickness of the support pad 41 is the same as the thickness of the horizontal cross block of the positioning clamp block 3; when working, when the symmetrical positioning clamp block 3 and the positioning clamp plate 4 are driven by the bidirectional screw rod 53 to move in opposite directions to a size slightly larger than the wheel hub size, at this time, the operator can align the lower surface of the wheel hub with the support pad. 41 is in contact with the horizontal cross block of the positioning clamp plate 4 of the L-shaped structure, and then the motor is slowly controlled to rotate in the forward direction, so that the vertical block of the positioning clamp block 3 and the inner wall of the positioning clamp plate 4 can be clamped and fit between the outer ring surface and the inner ring surface of the wheel hub, so that the wheel hub can be accurately positioned. A rubber layer is provided on the surfaces of the positioning clamp block 3, the positioning clamp plate 4 and the supporting pad block 41, which can prevent the positioning clamp block 3 and the positioning clamp plate 4 from being in rigid contact with the surface of the wheel hub, thereby causing damage to the surface of the wheel hub after grinding or polishing, thereby affecting the quality of the wheel hub processing on the positioning tooling.

[0031] like Figures 2 to 6As shown, a telescopic positioning mechanism 6 is provided on the support pad 41, and the telescopic positioning mechanism 6 includes a positioning pin 61, a sealing slider 62, an elastic hose 63, an electromagnetic suction block 64 and an elastic conduit 65. A positioning slot 42 is provided on the upper surface of the support pad 41, and a positioning pin 61 is inserted and sealed and slidably inserted in the positioning slot 42 through the sealing slider 62. The bottom end of the sealing slider 62 is connected to the bottom end surface of the positioning slot 42 through a spring. The top ends of at least four of the elastic hoses 63 are fixed to the inner wall of the mounting cavity 21, and the bottom end of each of the elastic hoses 63 is magnetically adsorbed to the upper surface of the second bevel gear 55 after the electromagnetic suction block 64 is energized. The elastic hose 63 is connected to the bottom end of the positioning slot 42 through the elastic conduit 65; when working, when the motor needs to rotate, the second bevel gear 55 drives at least four first bevel gears 54 to rotate synchronously, so that the positioning clamp 3 and the positioning clamp plate 4 rotate synchronously. When the symmetrical positioning clamp 3 and the positioning clamp plate 4 move a certain distance, the movement of the positioning clamp plate 4 will stretch the elastic conduit 65. At this time, the operator can control the electromagnetic suction block 64 at the lower end of the multiple elastic hoses 63 to be energized through the control panel, so that the electromagnetic suction block 64 has a magnetic adsorption force and is adsorbed to the upper surface of the second bevel gear 55. When the second bevel gear 55 continues to rotate, the multiple elastic hoses 63 will be torsionally deformed, so that the air inside the multiple elastic hoses 63 enters the positioning slot 42 through the elastic conduit 65, and then pushes the positioning pin 61 to slide upward and extend to the upper surface of the support pad 41. Therefore, when the wheel hub is placed into the cross block of the positioning clamp 3 and the upper surface of the support pad 41, the positioning pin 61 extending from the upper surface of the support pad 41 will be inserted into the nut hole opened on the inner ring surface of the wheel hub, thereby being able to play a secondary positioning role for the wheel hub placed on the positioning platform 2.

[0032] like Figure 5 As shown, the diameter of the locating pin 61 is smaller than the diameter of the nut hole on the wheel hub, and the outer wall of the locating pin 61 is sealed with an elastic rubber film 7, and the elastic rubber film 7 and the locating pin 61 are arranged non-contactly; during operation, when the locating pin 61 is inserted into the nut hole of the wheel hub, since the locating clamp block 3 and the locating clamp plate 4 have not completely clamped the wheel hub at this time, the locating clamp block 3 and the locating clamp plate 4 need to continue to move in the same direction. Therefore, the diameter of the designed locating pin 61 is smaller than the diameter of the nut hole, so that the locating clamp plate 4 can continue to move a short distance to fit and clamp the inner ring surface of the wheel hub. At this time, wrapping the elastic rubber film 7 on the surface of the locating pin 61 will buffer the locating pin 61, thereby reducing the damage to the locating pin 61 or the nut hole caused by the locating pin 61 hitting the nut hole when the locating pin 61 moves synchronously with the locating clamp plate 4.

[0033] like Figures 4 to 6As shown, a limited sliding cavity 611 is provided inside the positioning pin 61, and a positioning sliding tube 8 is slidably inserted in the limited sliding cavity 611, and the positioning sliding tube 8 passes through the sealing slider 62 and is connected to the bottom end surface of the positioning sliding groove 42, and an air guide hole 81 is provided on the outer ring surface of the upper end of the positioning sliding tube 8, and the air guide hole 81 is slidably connected to the limited sliding cavity 611 and the positioning sliding groove 42, and a plurality of expansion holes 612 are evenly provided on the outer wall of the positioning pin 61, and the plurality of expansion holes 612 and the limited sliding cavity 611 are connected to each other. When working, when the positioning pin 61 is raised to the maximum height under the push of the gas, the positioning slide tube 8 inside the positioning pin 61 is located at the lowest end position of the limiting slide cavity 611, and the air guide hole 81 opened on the outer wall of the positioning slide tube 8 will be located in the positioning slide groove 42. At this time, since the positioning clamp block 3 and the positioning clamp plate 4 are not completely attached to the outer ring surface of the wheel hub, the second bevel gear 55 needs to continue to rotate. At this time, the multiple elastic conduits 65 will continue to twist and compress the air inside, so that the air The elastic conduit 65 enters the positioning slot 42, then enters the positioning pin 61 through the air guide hole 81 and the positioning slide tube 8, and then enters the cavity between the elastic rubber membrane 7 and the positioning pin 61 through the expansion hole 612, so that the elastic rubber membrane 7 can expand in the nut hole, and then the expanded elastic rubber membrane 7 can be filled in the nut hole, thereby improving the secondary positioning effect of the multiple positioning pins 61 on the wheel hub; when the wheel hub needs to be removed from the positioning platform 2, the operator needs to control the electromagnetic suction block 64 to cut off the power first, so that the electromagnetic suction block 64 is separated from the second bevel gear 55, and the multiple elastic conduits 65 will recover by themselves when they are no longer subjected to torsional force, thereby facilitating the extraction of gas in the positioning slot 42, facilitating the contraction of the expanded elastic rubber membrane 7, and then facilitating the contraction of the positioning pin 61 spring into the positioning slot 42 under the elastic restoring force, thereby facilitating the positioning clamp 3 and the positioning clamp plate 4 to move away from each other at the same time, so as to facilitate the removal of the wheel hub from the positioning platform 2.

[0034] like Figure 1 As shown, at least four support legs (1) are provided, and a support pad (9) is welded and fixed on the lower surface of each support leg (1), and a bolt hole is opened on the support pad (9); when working, when the positioning platform 2 is moved to a predetermined position, the multiple support pads 9 fixed on the lower surface of the support leg 1 will contact the ground, which can increase the contact area between the support leg 1 and the ground, and improve the stability of the positioning platform 2 when working, and the operator can also drill holes on the ground, align the bolt holes on the support pad 9 with the drilled holes on the ground, and then fix the support pad 9 to the ground by expansion bolts.

[0035] like Figure 1As shown, the lower surface of each support pad (9) is coated with an anti-rust layer; when working, the anti-rust layer is applied to the lower surface of the support pad 9, which can reduce the corrosion rate of the support pad 9 due to the moisture of the ground and increase the service life of the positioning platform 2.

[0036] Working principle: When it is necessary to use the positioning fixture designed by the present invention to clamp and position the automobile wheel hub, the operator first determines the maximum outer ring size of the wheel hub. When multiple sets of mutually symmetrical positioning clamps 3 and positioning clamps 4 are required to move synchronously, the operator controls the motor fixed inside the positioning platform 2 through the control panel on the positioning fixture. The output rotation of the motor will drive the second bevel gear 55 to rotate through the rotating shaft. At this time, the second bevel gear 55 will drive at least four first bevel gears 54 to rotate synchronously, and then at least four bidirectional spiral screws 53 will be synchronized in the installation cavity 21. The rotation of the bidirectional spiral screw 53 drives the symmetrical moving blocks 52 engaged by the nut pair to move in opposite directions, so that the positioning clamps 3 and the positioning clamps 4 can be driven to move closer to each other at the same time through the guide slider 51, and the guide slider 51 slides in the guide slot 22, which can adjust at least four The positioning clamps 3 and the positioning clamps 4 play a role in limiting sliding, preventing the positioning clamps 3 and the positioning clamps 4 from offsetting when sliding, so that at least four groups of symmetrical positioning clamps 3 and positioning clamps 4 can be synchronously clamped and fitted between the outer ring surface and the inner ring surface of the wheel hub, thereby realizing accurate clamping and positioning of the wheel hub; when the wheel hub needs to be removed from the positioning fixture after subsequent processing on the positioning fixture is completed, at this time, the operator controls the motor to rotate in the opposite direction through the control panel, so that the second bevel gear 55 can drive the multiple bidirectional spiral screws 53 to rotate in the opposite direction by meshing with at least four first bevel gears 54, and then synchronously drive and disengage at least four groups of symmetrical positioning clamps 3 and positioning clamps 4 clamped on the outer ring surface and the inner ring wall of the wheel hub, so as to facilitate the quick and safe removal of the wheel hub from the positioning table 2 and replace it with the next wheel hub to be processed for processing.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A positioning tool for automobile wheel hub processing, comprising a support leg (1) and a positioning platform (2), wherein a plurality of support legs (1) are fixed to the lower surface of the positioning platform (2), characterized in that: At least four positioning clamps (3) are slidably arranged on the upper surface of the outer ring of the positioning platform (2), and at least four positioning clamps (4) are also slidably arranged at the center position of the upper surface of the positioning platform (2), each of the positioning clamps (3) and the positioning clamps (4) are arranged in alignment with each other, and a synchronous adjustment mechanism (5) is arranged inside the positioning platform (2), and the synchronous adjustment mechanism (5) is used to synchronously adjust and move each group of mutually symmetrical positioning clamps (3) and positioning clamps (4), so as to facilitate the synchronous clamping and positioning of the wheel hub on the positioning platform (2) by multiple groups of symmetrical positioning clamps (3) and positioning clamps (4); The synchronous adjustment mechanism (5) comprises a guide slider (51), a moving block (52), a bidirectional screw rod (53), a first bevel gear (54) and a second bevel gear (55); a mounting cavity (21) is provided inside the positioning platform (2), and at least four guide slots (22) are provided on the surface of the positioning platform (2), and each guide slot (22) is communicated with the mounting cavity (21); a guide slider (51) is fixed to the lower surface of each positioning clamping block (3) and the positioning clamping plate (4), and the guide slider (51) is slidably arranged in the guide slot (22); each guide slider (51) is provided with a plurality of guide slots (22) and a plurality of guide slots (22) are provided on the lower surface of each positioning clamping block (3) and the positioning clamping plate (4); 1) is fixed with a moving block (52) on the bottom end surface, and the moving block (52) is slidably arranged in the installation cavity (21), two mutually symmetrical moving blocks (52) are rotationally connected to the bidirectional spiral screw (53) through a nut pair, one end of at least four of the bidirectional spiral screws (53) is rotationally installed on the side wall of the installation cavity (21), and the other end thereof is fixed with a first bevel gear (54), at least four of the first bevel gears (54) are meshed with the same second bevel gear (55) for transmission, and the second bevel gear (55) is connected to the output shaft of a motor fixed at the center position of the rotation cavity through a rotating shaft; A support pad (41) is fixed below the outer ring surface of the positioning clamp (4), and a rubber layer is also provided on the outer surface of the support pad (41) and the positioning clamp (4), and the thickness of the support pad (41) is the same as the thickness of the horizontal cross block of the positioning clamp (3); The support pad (41) is provided with a telescopic positioning mechanism (6), and the telescopic positioning mechanism (6) comprises a positioning pin (61), a sealing slider (62), an elastic hose (63), an electromagnetic suction block (64) and an elastic conduit (65). The upper surface of the support pad (41) is provided with a positioning slot (42), and a positioning pin (61) is inserted in the positioning slot (42) in a sealing and sliding manner through the sealing slider (62). The bottom end of the sealing slider (62) is connected to the bottom end surface of the positioning slot (42) through a spring. The top ends of at least four of the elastic hoses (63) are fixed to the inner wall of the mounting cavity (21), and the bottom end of each of the elastic hoses (63) is magnetically adsorbed to the upper surface of the second bevel gear (55) after the electromagnetic suction block (64) is energized. The elastic hose (63) is connected to the bottom end of the positioning slot (42) through the elastic conduit (65).

2. The positioning tool for automobile wheel hub processing according to claim 1, characterized in that: The cross section of the positioning clamp block (3) is an L-shaped structure, and the surface of the positioning clamp block (3) with the L-shaped structure is provided with a rubber layer.

3. The positioning tool for automobile wheel hub processing according to claim 1, characterized in that: The diameter of the positioning pin (61) is smaller than the diameter of the nut hole on the wheel hub, and the outer wall of the positioning pin (61) is sealed with an elastic rubber membrane (7), and the elastic rubber membrane (7) and the positioning pin (61) are arranged in a non-contact manner.

4. The positioning tool for automobile wheel hub processing according to claim 3 is characterized in that: A limiting sliding cavity (611) is provided inside the positioning pin (61), and a positioning sliding tube (8) is slidably inserted in the limiting sliding cavity (611). The positioning sliding tube (8) passes through the sealing slider (62) and is connected to the bottom end surface of the positioning sliding groove (42).

5. The positioning tool for automobile wheel hub processing according to claim 4, characterized in that: An air guide hole (81) is provided on the outer ring surface of the upper end of the positioning slide tube (8), and the air guide hole (81) is slidably connected to between the limiting slide cavity (611) and the positioning slide groove (42); a plurality of expansion holes (612) are evenly provided on the outer wall of the positioning pin (61), and the plurality of expansion holes (612) are connected to the limiting slide cavity (611).

6. The positioning tool for automobile wheel hub processing according to claim 1, characterized in that: At least four support legs (1) are provided, and a support pad is welded and fixed on the lower surface of each support leg (1), and a bolt hole is provided on the support pad.

7. The positioning tool for automobile wheel hub processing according to claim 6, characterized in that: The lower surface of each supporting pad is coated with an anti-rust layer.

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