An adjustable electric vehicle wheel hub hole detection and positioning device

Abstract

The present invention discloses an adjustable electric vehicle wheel hub hole detection and positioning device, which relates to the field of electric vehicle production technology, including a test bench, a docking assembly and a detection assembly. First fixed seats are arranged on both sides of the top of the test bench, and a first motor is arranged on the outer end of the first fixed seat, and a bidirectional screw is arranged at the output end of the first motor. When the second motor of the present invention is working, the fitting wheel can rotate. Since the fitting wheel fits with the wheel hub, the wheel hub can rotate inside the docking plate. After the wheel hub rotates, it can rotate to the position where the positioning hole and the detection rod coincide. At this time, if the size of the wheel hub positioning hole meets the standard, the detection rod will extend into the inside of the wheel hub positioning hole due to the elastic reset of the first reset spring, and at this time, the detection rod will be released from the fit with the pressure sensor due to displacement. Through the above operation, the staff only needs to observe whether the value of the pressure sensor changes to detect the diameter size of the wheel hub positioning hole.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle production, and in particular to an adjustable electric vehicle wheel hub hole position detection and positioning device. Background Art

[0002] The wheel hub of an electric vehicle is an important part of the wheel. It is located between the tire and the brake system and serves to connect the axle and the tire. The main functions of the wheel hub are to support the weight of the vehicle body, transmit driving force and braking force, and position the tire. After the production of the electric vehicle wheel hub is completed, it is usually necessary to inspect the hole position of the wheel hub to ensure that the wheel hub can be assembled smoothly.

[0003] The hole position detection of electric vehicle hubs commonly found on the market usually uses caliper detection, three-coordinate measuring machines, and optical measurement. Caliper detection uses pins to be inserted into the holes one by one for detection, and the overall operation is relatively cumbersome. Three-coordinate measuring machine detection uses a three-coordinate measuring machine to perform precise measurement of the hole position of the hub, but the measurement speed is slow and the cost is high. Optical measurement has strict requirements on the detection environment and is prone to misdetection when used in an environment with insufficient light and severe interference.

[0004] Therefore, in view of this, the existing structure and defects are studied and improved, and an adjustable electric vehicle wheel hub hole position detection and positioning device is proposed. Summary of the invention

[0005] The purpose of the present invention is to provide an adjustable electric vehicle wheel hub hole position detection and positioning device 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: an adjustable electric vehicle wheel hub hole position detection and positioning device, comprising a test bench, a docking assembly and a detection assembly, wherein first fixed seats are arranged on both sides of the top of the test bench, and a first motor is arranged on the outer end of the first fixed seat, a bidirectional lead screw is arranged at the output end of the first motor, and a docking assembly is arranged at the outer end of the bidirectional lead screw, a wheel hub is arranged inside the docking assembly, and a first electric control push rod is arranged on the side of the docking assembly away from the wheel hub, and a detection assembly is arranged at the output end of the first electric control push rod, the detection assembly comprises a displacement disk, a fixed disk, a pressure sensor, a detection rod, a pressure-sensitive head, a docking seat and a first reset spring, a fixed disk is arranged at the outer end of the displacement disk, and a pressure sensor is arranged on the side of the fixed disk close to the displacement disk, a detection rod is sleeved on the inner side of the displacement disk, and a pressure-sensitive head is installed on the side of the detection rod close to the wheel hub, a docking seat is arranged at the outer end of the detection rod, and a first reset spring is arranged between the docking seat and the displacement disk.

[0007] Furthermore, the docking assembly includes a displacement seat, a screw slide, a docking plate, an insertion head, a through groove and a ball plate. The displacement seat is provided with a screw slide inside, and the docking plate is provided at the top of the displacement seat. The docking plate is provided with an insertion head on the side close to the wheel hub, and a through groove is provided on the inner side of the docking plate, and a ball plate is provided on the inner side of the docking plate.

[0008] Furthermore, the displacement seat is integrated with the docking plate, and the bidirectional lead screw rotates so that the lead screw slide drives the displacement seat to move.

[0009] Furthermore, the inner contour size of the docking plate is consistent with the outer contour size of the wheel hub, and the ball bearing plate fits the outer edge of the wheel hub.

[0010] Furthermore, the docking plate and the insertion head are integrated, and the outer contour size of the insertion head is consistent with the size of the central hole of the wheel hub.

[0011] Furthermore, the detection rod is elastically connected to the first return spring via a docking seat, and the detection rod passes through the through slot.

[0012] Furthermore, the number of the detection rods is consistent with the number of the wheel hub positioning holes, and the outer contour dimensions of the detection rods are consistent with the standard dimensions of the wheel hub positioning holes.

[0013] Furthermore, a positioning assembly is disposed on the front and rear sides of the test bench, and the positioning assembly includes a second fixed seat, a second electrically-controlled push rod, a pushing seat, a second return spring, a mounting head, a tension rope, a tension sensor, a second motor and a fitting wheel. A second electrically-controlled push rod is disposed on the outer end of the second fixed seat, and a pushing seat is disposed on the output end of the second electrically-controlled push rod. A mounting head is disposed on the outer end of the pushing seat, and a second return spring is disposed between the mounting head and the pushing seat. A tension rope is disposed between the mounting head and the pushing seat, and a tension sensor is disposed at the middle end of the tension rope. A second motor is disposed on the outer end of the mounting head, and a fitting wheel is connected to the output end of the mounting head.

[0014] Furthermore, the pushing seat is elastically connected to the mounting head via a second return spring, and the mounting head and the center axis of the wheel hub are at the same height.

[0015] Furthermore, the second motor drives the fitting wheel to rotate, and the fitting wheel fits with the wheel hub.

[0016] The present invention provides an adjustable electric vehicle wheel hub hole position detection and positioning device, which has the following beneficial effects:.

[0017] 1. After the wheel hub of the present invention is fixed, the first electrically controlled push rod retracts, which can drive the displacement plate to move in the direction of the wheel hub. At this time, the detection rod and the wheel hub positioning hole are in a staggered state, which makes the detection rod not move, and at this time, the displacement plate can stretch the first return spring of the docking seat to extend during the displacement process. After the first electrically controlled push rod is retracted, the second motor works to rotate the fitting wheel. Because the fitting wheel is fitted with the wheel hub, the wheel hub can rotate inside the fitting plate. A ball plate is provided at the fitting position of the fitting plate and the wheel hub, which can reduce the friction when the wheel hub rotates. After the rotation, the wheel hub can rotate to The position where the locating hole and the detection rod overlap, at this time, if the size of the wheel hub locating hole meets the standard, the detection rod will extend into the inside of the wheel hub locating hole due to the elastic reset of the first reset spring, and at this time the detection rod will be released from the fit with the pressure sensor due to the displacement. Through the above operations, the staff only needs to observe whether the value of the pressure sensor changes to detect the aperture size of the wheel hub locating hole. In addition, the position spacing between the detection rods is the same as the spacing between the wheel hub locating holes. Through this design, the equipment can detect the aperture and position spacing of the wheel hub locating holes at one time, which improves the efficiency of the wheel hub hole position detection.

[0018] 2. The first electric push rod of the present invention drives the displacement plate to continue to move toward the direction of the wheel hub, which enables the detection rod to slide in the wheel hub positioning hole. If there is no size error inside the wheel hub positioning hole, the detection rods on both sides of the equipment will contact inside the positioning hole. After the two sets of detection rods contact, the two sets of pressure-sensitive heads at their top ends can fit together. The pressure-sensitive heads are buried in the middle end of the detection rods. The pressure-sensitive heads can only be triggered when the two sets of detection rods contact. Through this design, the staff only needs to observe whether the pressure-sensitive heads sense pressure to determine whether there is a size error inside the wheel hub positioning hole. In addition, if the wheel hub positioning hole has no size error, the detection rods on both sides of the equipment will contact inside the positioning hole. When there is a dimensional error inside the hub positioning hole, the detection rod will be stuck inside the hub positioning hole when it is displaced. At this time, when the displacement disk is displaced, the detection rod will not be displaced due to the stretching of the first return spring. This can avoid the hard displacement causing the detection rod to bend or damaged. After the first return spring is stretched, the detection rod will contact the pressure sensor again. Through this design, when the staff observes that the pressure sensitive head does not sense pressure, they can judge whether the pressure sensor senses pressure to assist in determining whether there is a dimensional deviation inside the hub positioning hole. This can reduce detection errors caused by damage or failure of the pressure sensitive head.

[0019] 3. The present invention works through the second electric control push rod, which can make the pushing seat drive the installation head to move in the direction of the wheel hub, so that the fitting wheel can fit with the outer edge of the wheel hub, and a second return spring is arranged between the pushing seat and the installation head. The second return spring can deform after the fitting wheel fits with the wheel hub to realize the retraction of the installation head in the pushing seat, which can avoid the fitting wheel squeezing the wheel hub and causing damage due to excessive displacement force. During the rotation of the fitting wheel, if there is a surface dimensional accuracy error of the wheel hub, the fitting wheel will be displaced due to the elastic reset or compression of the second return spring. After the fitting wheel is displaced, the tension of the tension rope will change, which will change the value of the tension sensor. Through this design, the staff can determine whether the wheel hub has a large dimensional accuracy error by judging the sensing value of the tension sensor, and this test item can be detected at the same time as the above wheel hub hole detection, which can improve the overall functionality of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall three-dimensional structure of an adjustable electric vehicle wheel hub hole detection and positioning device of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of a wheel hub assembly completion of an adjustable electric vehicle wheel hub hole position detection and positioning device of the present invention;

[0022] Figure 3 This is a schematic diagram of the docking assembly structure of an adjustable electric vehicle wheel hub hole position detection and positioning device of the present invention;

[0023] Figure 4 A schematic diagram of the hub structure of an adjustable electric vehicle hub hole position detection and positioning device of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of a detection component of an adjustable electric vehicle wheel hub hole detection and positioning device of the present invention;

[0025] Figure 6 The present invention is an adjustable electric vehicle wheel hub hole detection and positioning device Figure 5 The enlarged structural diagram at A in the middle;

[0026] Figure 7 It is a schematic diagram of the overall cross-sectional structure of an adjustable electric vehicle wheel hub hole position detection and positioning device of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of a detection rod of an adjustable electric vehicle wheel hub hole detection and positioning device of the present invention;

[0028] Fig. 9 The present invention is a schematic diagram of the structure of an adjustment component of an adjustable electric vehicle wheel hub hole detection and positioning device.

[0029] In the figure: 1. test bench; 2. first fixed seat; 3. first motor; 4. bidirectional lead screw; 5. docking assembly; 501. displacement seat; 502. lead screw slide; 503. docking plate; 504. insertion head; 505. through slot; 506. ball plate; 6. wheel hub; 7. first electric control push rod; 8. detection assembly; 801. displacement plate; 802. fixed plate; 803. pressure sensor; 804. detection rod; 805. pressure sensitive head; 806. docking seat; 807. first reset spring; 9. adjustment assembly; 901. second fixed seat; 902. second electric control push rod; 903. push seat; 904. second reset spring; 905. installation head; 906. tension rope; 907. tension sensor; 908. second motor; 909. fitting wheel. DETAILED DESCRIPTION

[0030] See also Figures 1 to 9 The present invention provides a technical solution: an adjustable electric vehicle wheel hub hole detection and positioning device, comprising a test bench 1, a docking assembly 5 and a detection assembly 8, first fixed seats 2 are arranged on both sides of the top of the test bench 1, and a first motor 3 is arranged on the outer end of the first fixed seat 2, a bidirectional lead screw 4 is arranged at the output end of the first motor 3, and a docking assembly 5 is arranged at the outer end of the bidirectional lead screw 4, a wheel hub 6 is arranged inside the docking assembly 5, and a first electric control push rod 7 is arranged on the side of the docking assembly 5 away from the wheel hub 6, and a detection assembly 8 is arranged at the output end of the first electric control push rod 7, and the detection assembly 8 includes a position A displacement plate 801, a fixed plate 802, a pressure sensor 803, a detection rod 804, a pressure sensitive head 805, a docking seat 806 and a first return spring 807. The fixed plate 802 is arranged on the outer end of the displacement plate 801, and the pressure sensor 803 is arranged on the side of the fixed plate 802 close to the displacement plate 801. The detection rod 804 is sleeved on the inner side of the displacement plate 801, and the pressure sensitive head 805 is installed on the side of the detection rod 804 close to the wheel hub 6. The docking seat 806 is arranged on the outer end of the detection rod 804, and a first return spring 807 is arranged between the docking seat 806 and the displacement plate 801.

[0031] See also Figures 1 to 9The docking assembly 5 includes a displacement seat 501, a screw slide 502, a docking plate 503, an insertion head 504, a through slot 505 and a ball plate 506. The displacement seat 501 is provided with a screw slide 502, and the top of the displacement seat 501 is provided with a docking plate 503. The docking plate 503 is provided with an insertion head 504 on the side close to the wheel hub 6, and a through slot 505 is provided on the inner side of the docking plate 503, and a ball plate 506 is provided on the inner side of the docking plate 503. The displacement seat 501 and the docking plate 503 are integrated, and the bidirectional screw 4 rotates to make the screw slide 50 2 drives the displacement seat 501 to move, the inner contour size of the docking plate 503 is consistent with the outer contour size of the wheel hub 6, and the ball plate 506 is in contact with the outer edge of the wheel hub 6, the docking plate 503 and the insertion head 504 are integrated, and the outer contour size of the insertion head 504 is consistent with the size of the central hole position of the wheel hub 6, the detection rod 804 is elastically connected to the first return spring 807 through the docking seat 806, and the detection rod 804 passes through the through slot 505, the number of the detection rods 804 is consistent with the number of the positioning holes of the wheel hub 6, and the outer contour size of the detection rod 804 is consistent with the size of the positioning holes of the wheel hub 6 The test bench 1 has the same standard size. The front and rear sides of the test bench 1 are provided with a positioning assembly 9, which includes a second fixed seat 901, a second electric-controlled push rod 902, a pushing seat 903, a second reset spring 904, a mounting head 905, a tension rope 906, a tension sensor 907, a second motor 908 and a fitting wheel 909. The outer end of the second fixed seat 901 is provided with a second electric-controlled push rod 902, and the output end of the second electric-controlled push rod 902 is provided with a pushing seat 903. The outer end of the pushing seat 903 is provided with a mounting head 905, and the mounting head 905 and the pushing seat 903 are connected. A second return spring 904 is arranged between the mounting head 905 and the pushing seat 903, a tension rope 906 is arranged between the mounting head 905 and the pushing seat 903, and a tension sensor 907 is arranged at the middle end of the tension rope 906, a second motor 908 is arranged at the outer end of the mounting head 905, and a fitting wheel 909 is connected to the output end of the mounting head 905, the pushing seat 903 is elastically connected to the mounting head 905 through the second return spring 904, and the mounting head 905 and the central axis of the wheel hub 6 are at the same height position, the second motor 908 drives the fitting wheel 909 to rotate, and the fitting wheel 909 fits with the wheel hub 6;

[0032] The specific operation is as follows: the staff uses the mechanical claw to move the wheel hub 6 that needs to be inspected for hole position to the position between the two sets of docking plates 503. At this time, the first motor 3 drives the bidirectional screw 4 to rotate, which can make the screw slide 502 drive the displacement seat 501 to move on the top of the test bench 1, which can make the two sets of docking plates 503 move closer. The inner contour size of the docking plate 503 is consistent with the outer contour size of the wheel hub 6, and the size of the insertion head 504 is consistent with the size of the center hole of the contour 6, so that the docking plate 503 can wrap the wheel hub 6, and the wheel hub 6 is fixed by the insertion head 504 and the center hole support of the wheel hub 6. After the wheel hub 6 is fixed, the second electric control push rod 902 works, which can make the push seat 903 drive the installation head 905 to move in the direction of the wheel hub 6. The first push rod 7 is used to push the first push rod 804 and the second push rod 805 to push the first push rod 805. The second push rod 804 is used to push the first push rod 804 and the second push rod 805 to push the first push rod 805. After the control push rod 7 is retracted, the second motor 908 works to rotate the fitting wheel 909. Since the fitting wheel 909 fits with the wheel hub 6, the wheel hub 6 can rotate inside the docking plate 503. A ball plate 506 is provided at the fitting position between the docking plate 503 and the wheel hub 6, which can reduce the friction when the wheel hub 6 rotates. After the wheel hub 6 rotates, it can rotate to the position where the positioning hole and the detection rod 804 coincide with each other. At this time, if the size of the positioning hole of the wheel hub 6 meets the standard, the detection rod 804 will extend into the inner side of the positioning hole of the wheel hub 6 due to the elastic reset of the first reset spring 807. At this time, the detection rod 804 will be released from the fitting of the pressure sensor 803 due to the displacement. Through the above operations, the staff only needs to observe whether the value of the pressure sensor 803 changes to check the wheel hub. 6 positioning holes are detected. In addition, the position spacing between the detection rods 804 is the same as the spacing between the positioning holes of the hub 6. Through this design, the device can detect the aperture and position spacing of the positioning holes of the hub 6 at one time, which improves the hole position detection efficiency of the hub 6. After the detection of the aperture and hole position of the hub 6 is completed, the first electric control push rod 7 drives the displacement disk 801 to continue to move toward the direction of the hub 6, which allows the detection rod 804 to slide in the hub positioning hole. If there is no size error inside the positioning hole of the hub 6, the detection rods 804 on both sides of the device will contact inside the positioning hole. After the two groups of detection rods 804 contact, the two groups of pressure-sensitive heads 805 at their tops can fit together. The pressure-sensitive heads 805 are buried in the middle end of the detection rods 804.The pressure-sensitive head 805 can only be triggered when the two sets of detection rods 804 are in contact. Through this design, the staff only needs to observe whether the pressure-sensitive head 805 senses pressure to determine whether there is a dimensional error inside the positioning hole of the wheel hub 6. In addition, if there is a dimensional error inside the positioning hole of the wheel hub 6, the detection rod 804 will be stuck inside the positioning hole of the wheel hub 6 when it is displaced. At this time, when the displacement disk 801 is displaced, the detection rod 804 will not be displaced due to the stretching of the first return spring 807, which can avoid the detection rod 804 from bending or damage caused by hard displacement. After the first return spring 807 is stretched, the detection rod 804 will contact the pressure sensor 803 again. Through this design, when the staff observes that the pressure-sensitive head 805 does not sense pressure, they can judge by 3 Whether to sense pressure to assist in determining whether there is a dimensional deviation inside the positioning hole of the wheel hub 6, which can reduce the detection error caused by damage or failure of the pressure sensitive head 805. During the rotation of the fitting wheel 909, if there is a surface dimensional accuracy error of the wheel hub 6, the fitting wheel 909 will be displaced due to the elastic reset or compression of the second reset spring 904. After the fitting wheel 909 is displaced, the tension of the tension rope 906 will change, which will change the value of the tension sensor 907. Through this design, the staff can determine whether there is a large dimensional accuracy error of the wheel hub 6 by judging the sensing value of the tension sensor 907, and this test item can be detected at the same time as the above wheel hub 6 hole detection, which can improve the overall functionality of the equipment. ,

[0033] In summary, when using the adjustable electric vehicle wheel hub hole position detection and positioning device, the staff first uses the mechanical claw to move the wheel hub 6 that needs to be detected to the position between the two groups of docking plates 503. At this time, the first motor 3 drives the bidirectional screw 4 to rotate, which can make the screw slide 502 drive the displacement seat 501 to move on the top of the test bench 1, which can make the two groups of docking plates 503 move closer. The inner contour size of the docking plate 503 is consistent with the outer contour size of the wheel hub 6, and the size of the insertion head 504 is consistent with the size of the center hole of the contour 6, so that the docking plate 503 can wrap the wheel hub 6, and the wheel hub 6 is fixed by the insertion head 504 and the center hole support of the wheel hub 6;

[0034] Then, after the hub 6 is fixed, the second electrically controlled push rod 902 works, so that the push seat 903 drives the mounting head 905 to move in the direction of the hub 6, so that the fitting wheel 909 can fit with the outer edge of the hub 6, and a second return spring 904 is arranged between the push seat 903 and the mounting head 905. The second return spring 904 can deform after the fitting wheel 909 fits with the hub 6 to realize the inward retraction of the mounting head 905 in the push seat 903, which can avoid excessive displacement force causing the fitting wheel 909 to squeeze the hub 6 and cause damage;

[0035] Then the first electrically controlled push rod 7 retracts, which can drive the displacement plate 801 to move in the direction of the wheel hub 6. At this time, the detection rod 804 and the positioning hole of the wheel hub 6 are in a staggered state, which makes the detection rod 804 not move. At this time, the displacement plate 801 can make the docking seat 806 stretch the first return spring 807 to extend during the displacement process. After the first electrically controlled push rod 7 retracts, the second motor 908 works to make the fitting wheel 909 rotate. Because the fitting wheel 909 fits with the wheel hub 6, the wheel hub 6 can rotate inside the docking plate 503. The fitting place between the docking plate 503 and the wheel hub 6 is provided with a ball plate 506, which can reduce the friction when the wheel hub 6 rotates. After the wheel hub 6 rotates, It can be rotated to the position where the positioning hole and the detection rod 804 overlap. At this time, if the size of the wheel hub 6 positioning hole meets the standard, the detection rod 804 will extend into the inner side of the wheel hub 6 positioning hole due to the elastic reset of the first reset spring 807, and at this time, the detection rod 804 will be released from the fit with the pressure sensor 803 due to the displacement. Through the above operation, the staff only needs to observe whether the value of the pressure sensor 803 changes to detect the aperture size of the wheel hub 6 positioning hole. In addition, the position spacing between the detection rods 804 is the same as the spacing between the wheel hub 6 positioning holes. Through this design, the equipment can detect the aperture and position spacing of the wheel hub 6 positioning holes at one time, which improves the hole position detection efficiency of the wheel hub 6.

[0036] Subsequently, after the detection of the diameter and hole position of the wheel hub 6 is completed, the first electrically-controlled push rod 7 drives the displacement disk 801 to continue to move in the direction of the wheel hub 6, which enables the detection rod 804 to slide in the wheel hub positioning hole. If there is no dimensional error inside the wheel hub 6 positioning hole, the detection rods 804 on both sides of the equipment will contact inside the positioning hole. After the two sets of detection rods 804 contact, the two sets of pressure-sensitive heads 805 at their tops can fit together. The pressure-sensitive heads 805 are buried in the middle end of the detection rods 804. The pressure-sensitive heads 805 can only be triggered when the two sets of detection rods 804 contact. Through this design, the staff only needs to observe whether the pressure-sensitive heads 805 sense pressure to determine whether there is a dimensional error inside the wheel hub 6 positioning hole. In addition, if there is a size error inside the hub 6 positioning hole, the detection rod 804 will be stuck inside the hub 6 positioning hole when it is displaced. At this time, when the displacement plate 801 is displaced, the detection rod 804 will not be displaced due to the stretching of the first return spring 807. This can avoid the detection rod 804 from bending or being damaged due to the hard displacement. After the first return spring 807 is stretched, the detection rod 804 will contact the pressure sensor 803 again. Through this design, when the staff observes that the pressure-sensitive head 805 does not sense pressure, it can be determined whether the pressure sensor 803 senses pressure to assist in determining whether there is a size deviation inside the hub 6 positioning hole. This can reduce the detection error caused by damage or failure of the pressure-sensitive head 805.

[0037] Finally, when the fitting wheel 909 is rotating, if there is a surface dimensional accuracy error in the hub 6, the fitting wheel 909 will be displaced due to the elastic resetting or compression of the second resetting spring 904. After the fitting wheel 909 is displaced, the tension of the tension rope 906 will change, which will in turn change the value of the tension sensor 907. Through this design, the staff can determine whether the hub 6 has a large dimensional accuracy error by judging the sensing value of the tension sensor 907, and this test item can be detected at the same time as the above hub 6 hole position detection, which can improve the overall functionality of the equipment.

[0038] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An adjustable electric vehicle wheel hub hole detection and positioning device, characterized in that: The invention comprises a test bench (1), a docking assembly (5) and a detection assembly (8), wherein first fixing seats (2) are arranged on both sides of the top of the test bench (1), and a first motor (3) is arranged on the outer end of the first fixing seat (2), a bidirectional lead screw (4) is arranged at the output end of the first motor (3), and a docking assembly (5) is arranged at the outer end of the bidirectional lead screw (4), a wheel hub (6) is arranged inside the docking assembly (5), and a first electric control push rod (7) is arranged on the side of the docking assembly (5) away from the wheel hub (6), and a detection assembly (8) is arranged on the output end of the first electric control push rod (7), wherein the detection assembly (8) comprises a displacement disk (801), a fixing disk (802), a pressure sensor (803), a detection rod (804), a pressure sensitive head (805), a docking seat (806) and a first reset spring (807), a fixing disk (802) is arranged on the outer end of the displacement disk (801), and a fixing disk (802) is arranged on the side of the fixing disk (802) close to the displacement disk (801). A pressure sensor (803) is arranged, a detection rod (804) is sleeved on the inner side of the displacement disk (801), and a pressure sensitive head (805) is installed on the side of the detection rod (804) close to the wheel hub (6), a docking seat (806) is arranged on the outer end of the detection rod (804), and a first return spring (807) is arranged between the docking seat (806) and the displacement disk (801), and the docking assembly (5) comprises a displacement seat (501), a lead screw slide seat (502), a docking A plate (503), an insertion head (504), a through groove (505) and a ball plate (506); a lead screw slide seat (502) is arranged inside the displacement seat (501), and a docking plate (503) is arranged on the top of the displacement seat (501); an insertion head (504) is arranged on a side of the docking plate (503) close to the wheel hub (6), a through groove (505) is provided on the inner side of the docking plate (503), and a ball plate (506) is arranged on the inner side of the docking plate (503).

2. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 1, characterized in that: The displacement seat (501) and the docking plate (503) are integrated, and the bidirectional lead screw (4) rotates to cause the lead screw slide seat (502) to drive the displacement seat (501) to move.

3. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 2, characterized in that: The inner contour size of the docking plate (503) is consistent with the outer contour size of the wheel hub (6), and the ball bearing plate (506) fits the outer edge of the wheel hub (6).

4. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 3, characterized in that: The docking plate (503) and the insertion head (504) are integrated, and the outer contour size of the insertion head (504) is consistent with the size of the central hole of the wheel hub (6).

5. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 4, characterized in that: The detection rod (804) is elastically connected to the first return spring (807) via the docking seat (806), and the detection rod (804) passes through the through slot (505).

6. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 5, characterized in that: The number of the detection rods (804) is consistent with the number of the positioning holes of the wheel hub (6), and the outer contour dimensions of the detection rods (804) are consistent with the standard dimensions of the positioning holes of the wheel hub (6).

7. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 1, characterized in that: The test bench (1) is provided with a positioning assembly (9) on both the front and rear sides. The positioning assembly (9) comprises a second fixed seat (901), a second electrically controlled push rod (902), a pushing seat (903), a second return spring (904), a mounting head (905), a tension rope (906), a tension sensor (907), a second motor (908) and a fitting wheel (909). The second electrically controlled push rod (902) is provided at the outer end of the second fixed seat (901), and a push rod (902) is provided at the output end. A movable seat (903), a mounting head (905) is arranged at the outer end of the pushing seat (903), and a second return spring (904) is arranged between the mounting head (905) and the pushing seat (903), a tension rope (906) is arranged between the mounting head (905) and the pushing seat (903), and a tension sensor (907) is arranged at the middle end of the tension rope (906), a second motor (908) is arranged at the outer end of the mounting head (905), and the output end of the mounting head (905) is connected to a fitting wheel (909).

8. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 7, characterized in that: The pushing seat (903) is elastically connected to the mounting head (905) via a second return spring (904), and the mounting head (905) and the center axis of the wheel hub (6) are at the same height.

9. The adjustable electric vehicle wheel hub hole detection and positioning device according to claim 8, characterized in that: The second motor (908) drives the fitting wheel (909) to rotate, and the fitting wheel (909) fits with the wheel hub (6).

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