A wheel hub pressure test bench

Abstract

The present invention discloses a wheel hub pressure test bench, which belongs to the technical field of electric vehicles. It comprises: a crossbeam; a thrust assembly fixed on the lower side of the crossbeam, and the moving end of the thrust assembly is arranged downward; a lifting seat fixed on the moving end of the thrust assembly; a left support rod and a right support rod are vertically slidably installed on the lifting seat; a ball joint assembly is installed at the lower end of the left support rod and the right support rod, and a mounting hole is provided on the ball joint assembly; a power box is fixed on the lifting seat, and is used to drive the left support rod and the right support rod to slide in the same speed and in the opposite direction; one end of the connecting piece is fixedly connected to the end of the rotating shaft of the wheel hub, and the other end is installed in the mounting hole on the ball joint assembly. The present invention can provide stable support and precise inclination angle control for the wheel hub pressure test, apply controllable loads, simulate dynamic inclination angle changes, complete the pressure test at one time, and improve the test efficiency; it can realize the rapid installation of the wheel hub, allow angle adjustment, adapt to slight deformation, and improve the test safety.

Description

Technical Field

[0001] The invention relates to the technical field of electric vehicle production, and in particular to a wheel hub pressure test bench. Background Art

[0002] With the rapid development of the electric vehicle industry, the wheel hub, as an important component of the vehicle, has a direct impact on the vehicle's driving safety and stability through its performance and quality. During vehicle driving, the wheel hub not only has to withstand the vertical load from the road surface, but also has to withstand dynamic inclination changes caused by steering, bumps, etc. Therefore, pressure testing of the wheel hub, especially testing its performance under dynamic inclination changes, is a key link in ensuring the quality of the wheel hub, which can effectively avoid the occurrence of factory repairs.

[0003] Traditional wheel hub pressure test benches usually use a fixed support structure to simulate the stress of the wheel hub on the road by applying a vertical load. However, this test method cannot simulate the performance of the wheel hub under dynamic inclination changes, resulting in limited accuracy of the test results. In addition, in traditional test benches, the wheel hub is generally installed in a direct fixed manner, which is not convenient for disassembly and assembly, nor for adjusting test parameters. When it is necessary to control the load size and inclination changes, manual operation is often required, which is not only cumbersome, but also difficult to ensure the stability and consistency of the test. Summary of the invention

[0004] In view of the above-mentioned technical deficiencies, the present invention provides a wheel hub pressure test bench for completing factory testing of the wheel hub.

[0005] The present invention adopts the following technical solution: a wheel hub pressure test bench, comprising:

[0006] beam;

[0007] A thrust assembly is fixed to the lower side of the crossbeam, with the moving end of the thrust assembly arranged downward;

[0008] A lifting seat, fixed to the moving end of the thrust assembly;

[0009] The left support rod and the right support rod are vertically slidably mounted on the lifting seat; the lower ends of the left support rod and the right support rod are both mounted with ball joint assemblies, and the ball joint assemblies have mounting holes;

[0010] A power box, fixed on the lifting seat, is used to drive the left support rod and the right support rod to slide in opposite directions at the same speed;

[0011] The connecting piece has one end fixedly connected to the end of the rotating shaft of the wheel hub, and the other end is installed in the mounting hole on the ball joint assembly.

[0012] It is further that: the lifting seat includes a pair of parallel arranged transverse columns, and the two ends of the two transverse columns are fixedly connected by plate ribs; the two ends of the transverse columns are respectively provided with vertical sliding holes that pass through the transverse columns, and two relatively arranged wear-resistant plates are installed in the sliding holes; the opposite surfaces of the two wear-resistant plates are provided with sliding grooves, and the left support rod and the right support rod are slidably installed in the corresponding wear-resistant plate sliding grooves.

[0013] The power box comprises:

[0014] Two racks are respectively fixed on opposite surfaces of the left support rod and the right support rod;

[0015] The main gear is rotatably mounted in the middle of the left support rod and the right support rod;

[0016] Two transmission gear sets are symmetrically arranged on both sides of the main gear; the transmission gear sets are meshed with the main gear and the racks on the corresponding sides;

[0017] The power assembly is used to drive the main gear to rotate.

[0018] The transmission gear set includes an intermediate gear meshing with the main gear, the intermediate gear is meshingly connected with an upper gear and a lower gear symmetrically arranged up and down, and the upper gear and the lower gear are respectively meshing with the racks on the corresponding sides.

[0019] The power assembly comprises a motor and a worm fixedly connected to the output shaft of the motor; a turbine meshing with the worm is fixed on the rotating shaft of the intermediate gear.

[0020] The ball joint assembly comprises:

[0021] A hinge seat is fixed to the lower ends of the corresponding left support rod and right support rod; a spherical groove with two ends open is formed in the hinge seat;

[0022] The ball head is installed in the spherical groove on the hinge seat; the ball head is provided with the mounting hole, and the mounting hole passes through the ball head;

[0023] A limit pin is fixed on the hinge seat; an arc-shaped slide groove is provided on the ball head, and one end of the limit pin is slidably installed in the arc-shaped slide groove;

[0024] The elastic component is fixed at one end of the mounting hole away from the connecting piece and is used to tighten the end of the connecting piece inserted into the mounting hole.

[0025] The elastic component comprises:

[0026] A guide cylinder, one end of which is open, and the open end of the guide cylinder is fixed in the mounting hole of the ball head;

[0027] A piston, slidably mounted in the guide cylinder;

[0028] A retaining ring, embedded on the inner wall of the guide cylinder, used to limit the piston from sliding out of the guide cylinder;

[0029] A spring is installed on a side of the piston away from the ball head and is used to push the piston toward a side close to the ball head;

[0030] A push rod is fixed on one side of the piston close to the ball head; a push block for resisting the connecting piece is fixed on one end of the push rod close to the ball head.

[0031] The connecting part includes a sleeve with an internal thread, and the sleeve is connected to the end of the rotating shaft of the wheel hub by a thread; a positioning key is fixed on the sleeve, and the inner wall of the ball head mounting hole is provided with a keyway that cooperates with the positioning key, and the sleeve is inserted into the mounting hole; the sleeve is provided with an external thread, and a limiting nut is installed on the external thread section of the sleeve.

[0032] The thrust assembly comprises two symmetrically arranged oil cylinders, which are connected between the crossbeam and the lifting seat.

[0033] The beneficial effects of the present invention are:

[0034] The power box can ensure that the left and right support rods slide in opposite directions at the same speed, providing stable support and precise inclination angle control for the wheel hub pressure test, simulating the performance of the wheel hub under dynamic inclination angle changes, and improving the accuracy of the test; the power box uses the motor and worm gear as the power source, has good self-locking performance, and transmits power to the left and right support rods on both sides through the gear and rack transmission system. The left and right support rods have double gear contact points, and the power transmission is more stable;

[0035] The thrust assembly and lifting seat provide controllable load for the hub pressure test. Together with the power box’s adjustment of the hub inclination, the hub pressure test can be completed in one go, improving test efficiency.

[0036] The ball joint assembly and the connector are used to achieve quick installation of the wheel hub, and allow the connector to adjust the angle within a certain range. By cooperating with the power box to complete the inclination control of the wheel hub, it can also adapt to the slight deformation that may occur in the wheel hub during the pressure process; during the test, the elastic component on one side of the ball joint assembly can ensure the tight connection between the connector and the ball joint assembly. Combined with the limit nut on the connector, it can prevent the wheel hub from falling off or loosening during the test, thereby ensuring the safety of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 The present invention is a stereoscopic diagram of a wheel hub pressure test bench.

[0039] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0040] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0041] Figure 4 This is a front view of a wheel hub pressure test bench according to the present invention.

[0042] Figure 5 for Figure 4 Enlarged view of point C in the middle.

[0043] Figure 6 It is a schematic diagram of another embodiment of a wheel hub pressure test bench of the present invention.

[0044] Description of reference numerals: 1, beam; 11, slide rail;

[0045] 2. Thrust assembly; 21. Oil cylinder; 22. Extension rod;

[0046] 3. Lifting seat; 31. Horizontal column; 32. Plate reinforcement; 33. Sliding hole; 34. Wear-resistant plate;

[0047] 4. Left support rod;

[0048] 5. Right support rod;

[0049] 6. Power box; 61. Rack; 62. Main gear;

[0050] 63, transmission gear set; 631, intermediate gear; 632, upper gear; 633, lower gear;

[0051] 64, power assembly; 641, motor; 642, worm; 643, turbine;

[0052] 7. Ball joint assembly; 71. Hinge seat; 72. Limit pin;

[0053] 73, ball head; 731, mounting hole; 732, arc-shaped slide groove; 733, keyway;

[0054] 74, elastic component; 741, guide cylinder; 742, piston; 743, retaining ring; 744, spring; 745, push rod; 746, push block;

[0055] 8. Connecting piece; 81. Sleeve; 82. Positioning key; 83. Limiting nut;

[0056] 9. Wheel hub. DETAILED DESCRIPTION

[0057] 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.

[0058] Embodiment 1:

[0059] like Figures 1 to 4 As shown, the present invention provides a wheel hub pressure test bench, which can adjust the inclination angle and load of the wheel hub under the test state. The crossbeam 1 is a fixed part, which provides support for the entire device. The crossbeam 1 is connected to the lifting seat 3 through the thrust assembly 2. The lifting seat 3 is equipped with a left support rod 4, a right support rod 5 and a power box 6, and the power box 6 can control the left support rod 4 and the right support rod 5 to slide in opposite directions at the same speed. Ball joint assemblies 7 are installed at the lower ends of the left support rod 4 and the right support rod 5. During the test, connectors 8 are installed at both ends of the rotating shaft of the wheel hub 9, and the connectors 8 are installed on the corresponding ball joint assemblies 7. The inclination angle of the wheel hub 9 can be adjusted by driving the left support rod 4 and the right support rod 5 to slide in opposite directions at the same speed through the power box 6, and the load applied to the wheel hub 9 can be controlled by the thrust assembly 2.

[0060] like Figure 2 and Figure 4 As shown, the lifting seat 3 includes a pair of parallel horizontal columns 31, and the two ends of the two horizontal columns 31 are fixedly connected by plate ribs 32, forming a square frame structure as a whole. The thrust assembly 2 mainly includes two symmetrically arranged oil cylinders 21, and the piston rods of the oil cylinders 21 are arranged vertically downward. The piston rod is connected to an extension rod 22, and the extension rod 22 passes through the upper horizontal column 31 and is connected to the lower horizontal column 31.

[0061] The left support rod 4 and the right support rod 5 are slidably connected with the lifting seat 3. The installation of the left support rod 4 is taken as an example: the two ends of the horizontal column 31 are respectively provided with vertical sliding holes 33 that penetrate the horizontal column 31, and two wear-resistant plates 34 arranged oppositely are installed in the sliding holes 33. The wear-resistant plates 34 are fixedly connected to the horizontal column 31 by bolts, and the opposite surfaces of the two wear-resistant plates 34 are provided with sliding grooves. The left support rod 4 is inserted into the sliding holes 33 of the upper and lower horizontal columns 31, and the two side surfaces of the left support rod 4 are correspondingly slidably installed in the sliding grooves of the wear-resistant plates 34 on both sides.

[0062] like Figure 2 and Figure 4 As shown, the power box 6 includes four side plates fixed on the horizontal column 31, and the four side plates cooperate with the upper and lower horizontal columns 31 to form a closed box. The main gear 62 is rotatably mounted on the side plates of the power box 6, and is located in the middle of the left support rod 4 and the right support rod 5. Two transmission gear sets 63 are symmetrically arranged on both sides of the main gear 62, and racks 61 are fixed on the opposite surfaces of the left support rod 4 and the right support rod 5.

[0063] Take the transmission gear set 63 on the left support rod 4 as an example: the transmission gear set 63 includes an intermediate gear 631 meshing with the main gear 62, and the intermediate gear 631 is rotatably mounted on the side plate of the power box 6; the intermediate gear 631 is meshed with an upper gear 632 and a lower gear 633 arranged symmetrically up and down, and the upper gear 632 and the lower gear 633 have the same structure and are meshed with the rack 61. When the main gear 62 rotates, the power is transmitted to the rack 61 on the corresponding side through the transmission gear sets 63 on both sides, thereby controlling the left support rod 4 and the right support rod 5 to move in opposite directions at the same speed. Both the left and right support rods adopt double gear contact transmission, and the power transmission is more stable, which can reduce the influence of gear clearance on transmission accuracy.

[0064] The main gear 62 is driven by a power assembly 64. The power assembly 64 includes a motor 641 fixed on the upper horizontal column 31, and the output shaft of the motor 641 is fixedly connected to a worm 642. The two ends of the worm 642 are rotatably connected to the upper and lower horizontal columns 31 through bearings, and the upper end of the worm 642 passes through the upper horizontal column 31. A turbine 643 is fixed on the rotating shaft of the intermediate gear 631, and the turbine 643 and the worm 642 are meshed with each other. The rotation of the worm 642 is controlled by the forward and reverse rotation of the motor 641, and then the power is transmitted to the main gear 62, and finally the lifting and lowering adjustment of the left and right support rods is realized.

[0065] Embodiment 2:

[0066] Based on the above embodiment 1, Figures 1 to 5 As shown, the ball joint assembly 7 and the connector 8 are designed to achieve quick disassembly of the wheel hub 9 and to facilitate angle adjustment of the wheel hub 9 .

[0067] Combination Figure 3 and Figure 5 The ball joint assembly 7 includes a hinge seat 71 fixed to the lower ends of the left support rod 4 and the right support rod 5. The hinge seat 71 is provided with a spherical groove with both ends open. The ball head 73 is mounted in the spherical groove of the hinge seat 71. The ball head 73 is provided with a mounting hole 731 penetrating the ball head 73. The limit pin 72 is fixed to the hinge seat 71. The ball head 73 is provided with an arc-shaped sliding groove 732. One end of the limit pin 72 is slidably mounted in the arc-shaped sliding groove 732. The position of the ball head 73 is limited by the limit pin 72.

[0068] The elastic component 74 includes a guide cylinder 741 fixed to the end of the mounting hole 731 away from the connecting member 8. One end of the guide cylinder 741 is open, and the open end of the guide cylinder 741 is fixed in the mounting hole 731 of the ball head 73 by threaded connection. The piston 742 is slidably installed in the guide cylinder 741 and is limited by a retaining ring 743 embedded on the inner wall of the guide cylinder 741. A spring 744 is provided on the side of the piston 742 away from the ball head 73, and the spring 744 is used to push the piston 742 to the side close to the ball head 73. A push rod 745 is fixed on the side of the piston 742 close to the ball head 73, and a push block 746 for resisting the connecting member 8 is fixed at the end of the push rod 745.

[0069] The connector 8 includes a sleeve 81, and an internal thread is provided at one end of the sleeve 81 away from the wheel hub 9, and an external thread is provided at one end of the sleeve 81 close to the wheel hub 9. When in use, the sleeve 81 is connected to the thread at the end of the rotating shaft of the wheel hub 9. A positioning key 82 is fixed on the sleeve 81, and a key groove 733 that cooperates with the positioning key 82 is provided on the inner wall of the mounting hole 731 of the ball head 73. After the sleeve 81 is inserted into the mounting hole 731, the positioning key 82 and the key groove 733 form a match. A limiting nut 83 is installed on the external thread section of the sleeve 81. After the sleeve 81 is inserted into the mounting hole 731, the limiting nut 83 is rotated to press against the ball head 73 to limit the wheel hub 9.

[0070] Embodiment three:

[0071] Based on the above embodiment 2, combined with Figure 6 As shown, slide rails 11 fixed relative to the crossbeam 1 are arranged on both sides of the lifting seat 3, and the plate ribs 32 on both sides of the lifting seat 3 are slidably connected with the slide rails 11. The slide rails 11 guide the lifting seat 3 to improve the stability of the entire device when a load is applied.

[0072] Working principle:

[0073] Install the two sleeves 81 at the ends of the rotating shaft of the wheel hub 9 respectively, and rotate the limiting nut 83 to the side close to the wheel hub 9; insert the sleeve 81 into the mounting hole 731 of the ball head 73 on one side, and apply a certain pressure to squeeze the spring 744 in the elastic component 74, so that the sleeve 81 extends into the mounting hole 731 of the ball head 73 on one side by a certain distance, ensuring that the sleeve 81 at the other end of the rotating shaft of the wheel hub 9 can be smoothly inserted into the mounting hole 731 of the ball head 73 on the opposite side; after the sleeves 81 at both ends are installed, the limiting nut 83 is rotated to be close to the ball head 73 to limit the wheel hub 9 and complete the installation of the wheel hub 9;

[0074] The oil cylinder 21 in the thrust assembly 2 extends out, so that the wheel hub 9 is pressed against the road simulator, and the wheel hub 9 is started to start the test; during the test, the load of the wheel hub 9 can be adjusted by changing the oil pressure of the oil cylinder 21, and the inclination angle of the wheel hub 9 can be adjusted by controlling the lifting and lowering of the left support rod 4 and the right support rod 5 on both sides through the power box 6, so as to complete the pressure test of the wheel hub in different conditions at one time and improve the test efficiency.

[0075] It can be seen from the above embodiments that the present invention uses a power box to ensure that the left and right support rods slide in opposite directions at the same speed, provide stable support and precise inclination control for the wheel hub pressure test, simulate dynamic inclination changes, and improve test accuracy. The thrust assembly and the lifting seat provide controllable loads, cooperate with the power box, complete the pressure test in one go, and improve test efficiency. The ball joint assembly and the connector enable quick installation of the wheel hub, allow angle adjustment, adapt to slight deformation, and ensure test safety through elastic components and limit nuts.

[0076] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A wheel hub pressure test bench, characterized in that: include: Beam (1); A thrust assembly (2) is fixed to the lower side of the crossbeam (1), and the moving end of the thrust assembly (2) is arranged downward; A lifting seat (3) fixed on the moving end of the thrust assembly (2); The left support rod (4) and the right support rod (5) are vertically slidably mounted on the lifting seat (3); a ball joint assembly (7) is mounted on the lower end of each of the left support rod (4) and the right support rod (5), and a mounting hole (731) is provided on the ball joint assembly (7); A power box (6) is fixed on the lifting seat (3) and is used to drive the left support rod (4) and the right support rod (5) to slide in opposite directions at the same speed; A connecting member (8), one end of which is fixedly connected to the end of the rotating shaft of the wheel hub (9), and the other end of which is mounted in a mounting hole (731) on the ball joint assembly (7); The power box (6) comprises: Two racks (61) are respectively fixed on opposite surfaces of the left support rod (4) and the right support rod (5); A main gear (62) is rotatably mounted between the left support rod (4) and the right support rod (5); Two transmission gear sets (63) are symmetrically arranged on both sides of the main gear (62); the transmission gear sets (63) are meshed with the main gear (62) and the racks (61) on the corresponding sides; A power assembly (64), used for driving the main gear (62) to rotate; The ball joint assembly (7) comprises: A hinge seat (71) is fixed to the lower ends of the corresponding left support rod (4) and right support rod (5); a spherical groove with open ends is formed in the hinge seat (71); The ball head (73) is mounted in the spherical groove on the hinge seat (71); the ball head (73) is provided with the mounting hole (731), and the mounting hole (731) passes through the ball head (73); A limit pin (72) is fixed on the hinge seat (71); an arc-shaped sliding groove (732) is provided on the ball head (73), and one end of the limit pin (72) is slidably installed in the arc-shaped sliding groove (732); The elastic component (74) is fixed to an end of the mounting hole (731) away from the connecting piece (8) and is used to tighten the end of the connecting piece (8) inserted into the mounting hole (731).

2. The wheel hub pressure test bench according to claim 1, characterized in that: The lifting seat (3) comprises a pair of parallelly arranged transverse columns (31), the two ends of the two transverse columns (31) being fixedly connected via plate ribs (32); the two ends of the transverse columns (31) are respectively provided with vertical sliding holes (33) penetrating the transverse columns (31), and two oppositely arranged wear-resistant plates (34) are installed in the sliding holes (33); the opposite surfaces of the two wear-resistant plates (34) are provided with sliding grooves, and the left support rod (4) and the right support rod (5) are slidably installed in the corresponding sliding grooves of the wear-resistant plates (34).

3. The wheel hub pressure test bench according to claim 1, characterized in that: The transmission gear set (63) comprises an intermediate gear (631) meshing with the main gear (62); the intermediate gear (631) is meshingly connected with an upper gear (632) and a lower gear (633) symmetrically arranged up and down; the upper gear (632) and the lower gear (633) are respectively meshing with the rack (61) on the corresponding side.

4. The wheel hub pressure test bench according to claim 3, characterized in that: The power assembly (64) comprises a motor (641) and a worm (642) fixedly connected to an output shaft of the motor (641); a turbine (643) meshing with the worm (642) is fixed on the rotating shaft of the intermediate gear (631).

5. The wheel hub pressure test bench according to claim 1, characterized in that: The elastic component (74) comprises: A guide cylinder (741), one end of the guide cylinder (741) is open, and the open end of the guide cylinder (741) is fixed in the mounting hole (731) of the ball head (73); A piston (742) is slidably mounted in the guide cylinder (741); A retaining ring (743) is embedded in the inner wall of the guide cylinder (741) and is used to prevent the piston (742) from sliding out of the guide cylinder (741); A spring (744) is installed on a side of the piston (742) away from the ball head (73) and is used to push the piston (742) toward a side close to the ball head (73); The push rod (745) is fixed to a side of the piston (742) close to the ball head (73); a push block (746) for resisting the connecting member (8) is fixed to one end of the push rod (745) close to the ball head (73).

6. The wheel hub pressure test bench according to claim 1, characterized in that: The connecting member (8) comprises a sleeve (81) having an internal thread, the sleeve (81) being connected to the end of the rotating shaft of the wheel hub (9) via a thread; a positioning key (82) is fixed to the sleeve (81), a key groove (733) cooperating with the positioning key (82) is formed on the inner wall of the mounting hole (731) of the ball head (73), and the sleeve (81) is inserted into the mounting hole (731); the sleeve (81) has an external thread, and a limit nut (83) is installed on the external thread section of the sleeve (81).

7. The wheel hub pressure test bench according to claim 1, characterized in that: The thrust assembly (2) comprises two symmetrically arranged oil cylinders (21), and the oil cylinders (21) are connected between the crossbeam (1) and the lifting seat (3).

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