Steering loading system for quarter suspension fatigue testing machine

Abstract

The invention discloses a steering loading system for a quarter suspension fatigue testing machine, which comprises a steering loading unit, a steering gear mounting seat and a steering gear mounted on the steering gear mounting seat, and is characterized in that the bottom end of the steering loading unit is connected with a universal coupling; the steering gear comprises a steering gear support arranged on the steering gear mounting seat, a gear transmission assembly is mounted on the steering gear support and comprises a gear shaft and a rack shaft which are connected in a meshed mode, the universal coupler is connected with the gear shaft, the two ends of the rack shaft are connected with clamps, and the clamps are connected with the universal coupler. The clamp is provided with a suspension to be tested, and the steering loading test of the two suspensions is realized at the same time through the driving of the steering loading unit. According to the steering loading system for the quarter suspension fatigue testing machine, steering loading testing can be carried out on two suspensions at the same time, the testing efficiency is remarkably improved, and the testing cost is reduced.

Description

Technical Field

[0001] The invention relates to a quarter suspension fatigue testing machine, in particular to a steering loading system used for the quarter suspension fatigue testing machine. Background Art

[0002] In the modern automobile manufacturing industry, the performance of the automobile suspension system has a direct impact on the vehicle's driving stability, comfort and safety. With the development of technology and the improvement of consumer demand, the testing standards for automobile suspension systems have become increasingly stringent, especially in terms of durability and dynamic response. In order to accurately evaluate and optimize the suspension design, high-precision test equipment has become an indispensable key tool. One of them is the quarter suspension tester, which is specially designed for multi-degree-of-freedom durability and dynamic characteristics testing of the quarter model of a passenger car. By simulating the stress conditions of the vehicle suspension under real road conditions, it provides engineers with valuable test data.

[0003] Although the existing quarter suspension test machine can effectively simulate the impact of road bumps on the vehicle body and the stress state of the suspension system, it still has limitations in simulating the impact of wheel steering on the loading of suspension components such as springs and shock absorbers. In addition, the steering loading system in the current existing technology can only perform steering loading tests on a single suspension, with low test efficiency and high test costs. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the steering loading system of the current quarter suspension fatigue testing machine, the present invention provides a steering loading system for a quarter suspension fatigue testing machine, which can perform steering loading tests on two suspensions at the same time, significantly improving the test efficiency, reducing the test cost, and extending the service life.

[0005] To achieve the above object, the embodiments of the present invention adopt the following technical solutions:

[0006] A steering loading system for a quarter suspension fatigue testing machine comprises a steering loading unit, a steering gear mounting seat and a steering gear mounted on the steering gear mounting seat, wherein the bottom end of the steering loading unit is connected to a universal coupling, the steering gear comprises a steering gear support arranged on the steering gear mounting seat, a gear transmission assembly is mounted on the steering gear support, the gear transmission assembly comprises a meshing gear shaft and a rack shaft, the universal coupling is connected to the gear shaft, both ends of the rack shaft are connected to a fixture, a suspension to be tested is mounted on the fixture, and steering loading tests are performed on two suspensions simultaneously through the rotation drive of the steering loading unit.

[0007] According to one aspect of the present invention, the gear transmission assembly also includes a rack seat mounted on the steering gear support, the rack shaft is mounted inside the rack seat, the rack seat is sleeved with a gear seat, and the gear shaft is mounted inside the gear seat.

[0008] According to one aspect of the present invention, the steering gear further comprises an elastic supporting device, which is arranged inside the gear seat and is used to support the rack shaft to prevent the rack shaft from deformation.

[0009] According to one aspect of the present invention, the elastic support device includes a top block arranged inside the gear seat and overlapping the rack shaft, a pressure block is arranged on the other side of the top block, an elastic component sleeved on the pressure block, a pressure ring overlapped with the elastic component and sleeved on the other end of the pressure block, an adjustment bolt arranged on the other side of the pressure ring and a locking bolt installed on the other side of the adjustment bolt.

[0010] According to one aspect of the present invention, rack end covers are fixedly installed at both ends of the rack seat, bearing covers are fixedly installed on the gear seat and at both axial ends of the gear shaft, and clamping nuts are located on both sides of the gear seat and sleeved on the rack seat.

[0011] According to one aspect of the present invention, the steering loading unit includes a support column, the bottom end of the support column is connected to a reducer mounting plate through a steering support rod, a reducer is arranged on the reducer mounting plate, a servo motor is connected to the top of the reducer, a half coupling is connected to the bottom end of the reducer, the half coupling is connected to an output shaft, and the output shaft is connected to the universal coupling.

[0012] According to one aspect of the present invention, a scale is fixedly mounted on one side of the steering gear mounting seat, and a pointer is mounted at the bottom end of the steering gear and close to the scale.

[0013] According to one aspect of the present invention, a steering gear adjusting device is provided on the steering gear, and the steering gear adjusting device is used to adjust the position of the steering gear.

[0014] According to one aspect of the present invention, the steering gear adjustment device includes a nut installed at the bottom end of the steering gear, a screw rod installed on the nut, and a bearing seat installed on one end of the screw rod, and the bearing seat is fixedly installed on the steering gear mounting seat.

[0015] According to one aspect of the present invention, an adjustable bearing cover is sleeved and mounted on the screw rod, and the adjustable bearing cover is fixedly connected to the bearing seat.

[0016] The advantages of the implementation of the present invention are as follows: by setting the elastic support device and the steering gear support inside the gear transmission assembly, the deformation problem of the large-span rack is solved, and the bending stiffness of the rack is significantly improved; by the design of the elastic component, the wear and deformation of the rack support device during long-term operation is effectively compensated; by the setting of the steering gear adjustment device, the position of the steering gear is easily adjusted, and the steering transmission device is adjusted to the appropriate position with the help of pointer positioning, saving a lot of debugging time; by the design of the ruler and the pointer, the position of the steering gear can be accurately adjusted, so that the data in the experimental test is more accurate; by abandoning the sealing gasket, rubber material, lubricating oil, etc. in the steering gear of the actual vehicle, the steering gear can be adjusted to the appropriate position. Components and materials with poor applicability under limited environments enable the steering gear to have the ability to operate under extreme ambient temperatures, such as low temperature of -40°C and high temperature of 120°C; through the arrangement of the steering loading unit, the universal coupling and the steering gear, the steering loading test can be performed on the two suspensions at the same time, which significantly improves the test efficiency, reduces the test cost, and thus comprehensively enhances the overall test performance of the quarter suspension fatigue testing machine; the steering loading system for the quarter suspension fatigue testing machine of the present invention can perform steering loading tests on the two suspensions at the same time, which significantly improves the test efficiency, reduces the test cost, and prolongs the service life, thereby comprehensively enhancing the overall test performance of the quarter suspension fatigue testing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments 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.

[0018] Figure 1 It is a three-dimensional structural schematic diagram of a steering loading system for a quarter suspension fatigue testing machine according to the present invention;

[0019] Figure 2 It is a structural schematic diagram of a steering loading system for a quarter suspension fatigue testing machine according to the present invention;

[0020] Figure 3 It is a cross-sectional schematic diagram of the steering gear 3 of the present invention;

[0021] Figure 4 It is a cross-sectional schematic diagram of a steering loading system for a quarter suspension fatigue testing machine according to the present invention;

[0022] Numbers in the figure:

[0023] 1. Steering loading unit; 11. Support column; 12. Steering support rod; 13. Servo motor; 14. Reducer; 15. Reducer mounting plate; 16. Half coupling; 17. Output shaft; 2. Universal coupling; 3. Steering gear; 31. Gear transmission assembly; 311. Rack seat; 312. Rack shaft; 313. Gear shaft; 314. Gear seat; 315. Clamping nut; 316. Lower bearing cover; 317. Upper bearing Cover; 318, rack end cover; 32, steering gear support; 33, elastic support device; 331, top block; 332, pressure block; 333, elastic component; 334, pressure ring; 335, adjustment bolt; 336, locking bolt; 4, steering gear adjustment device; 41, nut; 42, adjustment bearing cover; 43, bearing seat; 44, screw rod; 5, steering gear mounting seat; 6, pointer; 7, ruler; 8, clamp; 9, reaction frame. DETAILED DESCRIPTION

[0024] 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.

[0025] In the description of the present invention, unless otherwise specified, the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "top", "bottom" and the like indicate directions or positional relationships based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] Preferred embodiment 1

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a steering loading system for a quarter suspension fatigue tester is generally installed on a quarter suspension fatigue tester, the quarter suspension fatigue tester is provided with two columns, the top of the columns is provided with a cross beam, the steering loading system is installed on the cross beam, the steering loading system includes a steering loading unit 1, a steering gear mounting seat 5, a steering gear 3 is installed on the steering gear mounting seat 5, the steering loading unit 1 includes a supporting column 11, the top of the supporting column 11 is fixedly installed on the cross beam, and the bottom of the supporting column 11 is fixedly installed on the cross beam. A steering support rod 12 is connected, and the bottom end of the steering support rod 12 is connected to a reducer mounting plate 15, and a reducer 14 is arranged on the reducer mounting plate 15. A servo motor 13 is connected to the top of the reducer 14, and the servo motor 13 is equipped with an encoder for feeding back the actual position and speed of the motor, so that the control system of the quarter suspension fatigue testing machine can accurately control the position and speed of the motor. The lower end of the reducer 14 is connected to a half coupling 16, and the half coupling 16 is connected to an output shaft 17, and the output shaft 17 is connected to the steering gear 3 through a universal coupling 2. The steering gear 3 includes a steering gear support 32 arranged on the steering gear mounting seat 5, and a gear transmission assembly 31 is installed on the steering gear support 32. The gear transmission assembly 31 includes a gear shaft 313 and a rack shaft 312 that are meshed and connected. The universal joint 2 is connected to the gear shaft 313, and both ends of the rack shaft 312 are connected to a fixture 8. The suspension to be tested is installed on the fixture 8, and the fixture is installed on the reaction frame 9; the steering loading test of the two suspensions is realized at the same time by the drive of the steering loading unit 1. In detail, the servo motor 13 rotates, and the reducer 14 converts the high-speed rotation of the servo motor into a low-speed and high-torque rotation. The output shaft 17 of the reducer 14 drives the universal joint 2 to rotate, thereby rotating the gear shaft 313, driving the rack shaft to move in the left and right directions, thereby realizing the steering loading test of the two suspensions.

[0028] Advantages of this embodiment: The gear transmission assembly is used to realize the conversion from rotary motion to linear motion. The steering loading unit, the universal coupling, and the steering gear are used to perform steering loading tests on two suspensions at the same time, which significantly improves the test efficiency, reduces the test cost, and prolongs the service life, thereby comprehensively enhancing the overall test performance of the quarter suspension fatigue tester.

[0029] Preferred implementation 2

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a steering loading system for a quarter suspension fatigue tester is generally installed on a quarter suspension fatigue tester, the quarter suspension fatigue tester is provided with two columns, the top of the columns is provided with a crossbeam, the steering loading system is installed on the crossbeam, the steering loading system includes a steering loading unit 1, a steering gear mounting seat 5, a steering gear 3 is installed on the steering gear mounting seat 5, the steering loading unit 1 includes a supporting column 11, the supporting column 11 is fixedly installed on the crossbeam, and the bottom end of the supporting column 11 is connected by A steering support rod 12 is connected, and a reducer mounting plate 15 is connected to the bottom end of the steering support rod 12. A reducer 14 is arranged on the reducer mounting plate 15. A servo motor 13 is connected to the top of the reducer 14. The servo motor 13 is equipped with an encoder for feeding back the actual position and speed of the motor, so that the control system of the quarter suspension fatigue testing machine can accurately control the position and speed of the motor. A half coupling 16 is connected to the lower end of the reducer 14, and the half coupling 16 is connected to an output shaft 17. The output shaft 17 is connected to the steering gear 3 through a universal coupling 2. The steering gear 3 includes a steering gear support 32 arranged on the steering gear mounting seat 5, and a gear transmission assembly 31 is installed on the steering gear support 32. The gear transmission assembly 31 includes a gear shaft 313 and a rack shaft 312 that are meshed and connected. The universal joint 2 is connected to the gear shaft 313, and both ends of the rack shaft 312 are connected to a fixture 8. The suspension to be tested is installed on the fixture 8, and the fixture is installed on the reaction frame 9; the steering loading test of the two suspensions is realized at the same time by the drive of the steering loading unit 1. In detail, the servo motor 13 rotates, and the reducer 14 converts the high-speed rotation of the servo motor into a low-speed and high-torque rotation. The output shaft 17 of the reducer 14 drives the universal joint 2 to rotate, thereby rotating the gear shaft 313 and driving the rack shaft 312 to move in the left and right directions, thereby realizing the steering loading test of the two suspensions.

[0031] In practical applications, the gear transmission assembly 31 also includes a rack seat 311 installed on the steering gear support 32, the rack seat 311 is set to be cylindrical, the rack shaft 312 is installed inside the rack seat 311, the rack shaft 312 has teeth in the middle and cylindrical shafts at both ends, and the entire rack shaft 312 completely penetrates the rack seat 311; a gear seat 314 is sleeved and installed on the rack seat 311, and the gear shaft 313 is installed inside the gear seat 314, preferably The gear seat 314 is arranged at the center of the rack seat 311, two steering gear supports 32 are arranged and are symmetrically sleeved on the rack seat 311, rack end covers 318 are fixedly installed at both ends of the rack seat 311, lower bearing covers 316 and upper bearing covers 317 are fixedly installed on the gear seat 314 and at both ends of the axial direction of the gear shaft 313, and clamping nuts 315 are located on both sides of the gear seat 314 and sleeved on the rack seat 311. The arrangement of the rack end covers 318 and the bearing covers is conducive to preventing impurities such as dust and moisture from entering the interior of the gear, thereby improving the service life of the gear transmission assembly 31.

[0032] In practical applications, in order to improve the service life of the gear transmission assembly 31, the steering gear 3 also includes an elastic support device 33, which is arranged inside the gear transmission assembly 31 to prevent the rack shaft 312 from deforming; the elastic support device 33 includes a top block 331 arranged inside the rack seat 311 and overlapping the rack shaft 312, and a pressure block 332 is arranged on the other side of the top block 331, and an elastic component 333 is sleeved on the pressure block 332, one end of the elastic component 333 is overlapped on the pressure block 332, and the other end of the elastic component 333 is overlapped with a pressure ring 334, which is sleeved on the pressure block 332, and an adjusting bolt 335 is arranged on the other end of the pressure ring 334, and the adjusting bolt 335 is arranged inside the gear seat 314, and a locking bolt 336 is installed on the other end of the adjusting bolt 335, and the locking bolt 336 is arranged inside the gear seat 314. The elastic support device 33 is used to support the large-span rack to prevent its deformation. With the use of the elastic support device 33, the deformation problem of the large-span rack is solved and the bending stiffness of the rack is significantly improved. Through the design of the elastic component 333, the wear and deformation of the rack support device caused by long-term operation can be effectively compensated.

[0033] The advantages of this embodiment are as follows: through the setting of the gear transmission assembly, the conversion from rotational motion to linear motion is achieved; through the setting of the elastic support device and the steering gear support inside the gear transmission assembly, the deformation problem of the large-span rack is solved, and the bending stiffness of the rack is significantly improved; through the design of the elastic component, the wear and deformation of the rack support device during long-term operation is effectively compensated; through the setting of the steering loading unit, the universal coupling and the steering gear, the steering loading test can be performed on two suspensions at the same time, which significantly improves the test efficiency, reduces the test cost, and extends the service life, thereby comprehensively enhancing the overall test performance of the quarter suspension fatigue testing machine.

[0034] Preferred embodiment 3

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, a steering loading system for a quarter suspension fatigue tester is generally installed on a quarter suspension fatigue tester, the quarter suspension fatigue tester is provided with two columns, the top of the columns is provided with a crossbeam, the steering loading system is installed on the crossbeam, the steering loading system includes a steering loading unit 1, a steering gear mounting seat 5, a steering gear 3 is installed on the steering gear mounting seat 5, the steering loading unit 1 includes a supporting column 11, the supporting column 11 is fixedly installed on the crossbeam, and the bottom end of the supporting column 11 is connected by A steering support rod 12 is connected, and a reducer mounting plate 15 is connected to the bottom end of the steering support rod 12. A reducer 14 is arranged on the reducer mounting plate 15. A servo motor 13 is connected to the top of the reducer 14. The servo motor 13 is equipped with an encoder for feeding back the actual position and speed of the motor, so that the control system of the quarter suspension fatigue testing machine can accurately control the position and speed of the motor. A half coupling 16 is connected to the lower end of the reducer 14, and the half coupling 16 is connected to an output shaft 17. The output shaft 17 is connected to the steering gear 3 through a universal coupling 2. The steering gear 3 includes a steering gear support 32 arranged on the steering gear mounting seat 5, and a gear transmission assembly 31 is installed on the steering gear support 32. The gear transmission assembly 31 includes a gear shaft 313 and a rack shaft 312 that are meshed and connected. The universal joint 2 is connected to the gear shaft 313, and both ends of the rack shaft 312 are connected to a fixture 8. The suspension to be tested is installed on the fixture 8, and the fixture is installed on the reaction frame 9; the steering loading test of the two suspensions is realized at the same time by the drive of the steering loading unit 1. In detail, the servo motor 13 rotates, and the reducer 14 converts the high-speed rotation of the servo motor into a low-speed and high-torque rotation. The output shaft 17 of the reducer 14 drives the universal joint 2 to rotate, thereby rotating the gear shaft 313 and driving the rack shaft 312 to move in the left and right directions, thereby realizing the steering loading test of the two suspensions.

[0036] In practical applications, the gear transmission assembly 31 also includes a rack seat 311 installed on the steering gear support 32, the rack seat 311 is set to be cylindrical, the rack shaft 312 is installed inside the rack seat 311, the rack shaft 312 has teeth in the middle and cylindrical shafts at both ends, and the entire rack shaft 312 completely penetrates the rack seat 311; a gear seat 314 is sleeved and installed on the rack seat 311, and the gear shaft 313 is installed inside the gear seat 314, preferably The gear seat 314 is arranged at the center of the rack seat 311, two steering gear supports 32 are arranged and are symmetrically sleeved on the rack seat 311, rack end covers 318 are fixedly installed at both ends of the rack seat 311, lower bearing covers 316 and upper bearing covers 317 are fixedly installed on the gear seat 314 and at both ends of the axial direction of the gear shaft 313, and clamping nuts 315 are located on both sides of the gear seat 314 and sleeved on the rack seat 311. The arrangement of the rack end covers 318 and the bearing covers is conducive to preventing impurities such as dust and moisture from entering the interior of the gear, thereby improving the service life of the gear transmission assembly 31.

[0037] In practical applications, in order to improve the service life of the gear transmission assembly 31, the steering gear 3 also includes an elastic support device 33, which is arranged inside the gear transmission assembly 31 to prevent the rack shaft 312 from deforming; the elastic support device 33 includes a top block 331 arranged inside the rack seat 311 and overlapping the rack shaft 312, and a pressure block 332 is arranged on the other side of the top block 331, and an elastic component 333 is sleeved on the pressure block 332, one end of the elastic component 333 is overlapped on the pressure block 332, and the other end of the elastic component 333 is overlapped with a pressure ring 334, which is sleeved on the pressure block 332, and an adjusting bolt 335 is arranged on the other end of the pressure ring 334, and the adjusting bolt 335 is arranged inside the gear seat 314, and a locking bolt 336 is installed on the other end of the adjusting bolt 335, and the locking bolt 336 is arranged inside the gear seat 314. The elastic support device 33 is used to support the large-span rack to prevent its deformation. With the use of the elastic support device 33, the deformation problem of the large-span rack is solved and the bending stiffness of the rack is significantly improved. Through the design of the elastic component 333, the wear and deformation of the rack support device caused by long-term operation can be effectively compensated.

[0038] In practical applications, a scale 7 is fixedly installed on one side of the steering gear mounting seat 5, and a pointer 6 is installed at the bottom of the steering gear 3 near the scale 7; the steering gear mounting seat 5 is installed inside the reaction frame 9. Preferably, it is set at the central position of the reaction frame 9. The steering gear mounting seat 5 includes a base and a support plate. The support plate is arranged on the base. Preferably, the support plate is in a "U" shape, that is, the two sides of the support plate bulge and the middle is concave. The two steering gear supports 32 are respectively arranged on the protruding parts on both sides of the support plate; the base is provided with mounting holes to facilitate the installation of the base inside the reaction frame 9; the scale 7 is arranged on the inner side of one side of the protruding part of the support plate, and the pointer 6 is arranged at the bottom of the steering gear support 32 on one side of the scale 7.

[0039] In practical applications, a steering gear adjusting device 4 is arranged at the bottom end of the steering gear. The steering gear adjusting device 4 is used to adjust the position of the steering gear 3; the steering gear adjusting device 4 includes a nut 41 installed at the bottom end of the steering gear 3. Preferably, the nut 41 is installed at the bottom end of the gear seat 314. A lead screw 44 is installed through the nut 41, and a bearing seat 43 is sleeved and installed at one end of the lead screw 44. The bearing seat 43 is fixedly installed on the steering gear mounting seat 5. Preferably, the bearing seat 43 is installed at the front end of the support plate; an adjusting bearing cover 42 is sleeved and installed on the lead screw 44, and the adjusting bearing cover 42 is fixedly connected to the bearing seat 43; by driving the lead screw 44 to rotate, the steering gear 3 is driven to move in the front-back direction of the support plate. The position of the steering gear 3 is determined by the pointer 6 at the bottom end of the steering 3 pointing to the position of the scale 7. The steering gear 3 is driven to move back and forth on the support plate by the steering gear adjusting device 4, and the position information of the steering gear 3 is determined by the position indicated by the pointer 6. When the pointer 6 indicates 0 on the scale of the scale 7, that is, the steering gear 3 corresponds to the central position of the reaction frame 9. Through the settings of the scale 7, the pointer 6 and the steering gear adjusting device 4, when the fatigue testing machine is performing tests, the steering gear 3 can be accurately adjusted to the required position, improving the accuracy of the simulated steering system, simplifying the operation process, and at the same time improving the accuracy and speed of position adjustment.

[0040] The advantages of this embodiment are as follows: through the setting of the gear transmission assembly, the conversion from rotational motion to linear motion is realized; through the setting of the elastic support device and the steering gear support inside the gear transmission assembly, the deformation problem of the large-span rack is solved, and the bending stiffness of the rack is significantly improved; through the design of the elastic component, the wear and deformation of the rack support device during long-term operation is effectively compensated; through the setting of the steering gear adjustment device, the position of the steering gear is convenient to adjust, and the steering transmission device is adjusted to the appropriate position with the help of pointer positioning, saving a lot of debugging time; through the design of the ruler and the pointer, the position of the steering transmission device can be accurately adjusted, so that the data in the experimental test is more accurate, the debugging time before the test is reduced, and the test efficiency is improved; through the setting of the steering loading unit, the universal coupling, and the steering gear, the steering loading test can be performed on the two suspensions at the same time, which significantly improves the test efficiency, reduces the test cost, and prolongs the service life, thereby comprehensively enhancing the overall test performance of the quarter suspension fatigue testing machine.

[0041] The steering gear designed by the present invention discards the components and materials such as sealing gaskets, rubber materials, and lubricating oil in the steering gear of a real vehicle, which have poor applicability in extreme environments. Therefore, the steering gear of the present invention has the ability to operate in extreme environmental temperatures, such as low temperature of -40°C and high temperature of 120°C.

[0042] The advantages of the implementation of the present invention are as follows: by setting the elastic support device and the steering gear support inside the gear transmission assembly, the deformation problem of the large-span rack is solved, and the bending stiffness of the rack is significantly improved; by the design of the elastic component, the wear and deformation of the rack support device caused by long-term operation is effectively compensated; by the setting of the steering gear adjustment device, it is convenient to adjust the position of the steering gear, and with the help of pointer positioning, it is ensured that the steering transmission device is adjusted to the appropriate position, saving a lot of debugging time and improving test efficiency; by the design of the ruler and the pointer, the position of the steering transmission device can be accurately adjusted, so that the data in the experimental test is more accurate; by abandoning the sealing gasket, rubber material, and lubricant in the steering gear of the actual vehicle, the steering gear can be adjusted to the appropriate position. Oil and other components and materials with poor applicability in extreme environments enable the steering gear to operate at extreme ambient temperatures, such as low temperature of -40°C and high temperature of 120°C; through the arrangement of the steering loading unit, the universal coupling and the steering gear, the steering loading test can be performed on the two suspensions at the same time, which significantly improves the test efficiency, reduces the test cost, and thus comprehensively enhances the overall test performance of the quarter suspension fatigue testing machine; the steering loading system for the quarter suspension fatigue testing machine of the present invention can perform steering loading tests on the two suspensions at the same time, which significantly improves the test efficiency, reduces the test cost, and prolongs the service life, thereby comprehensively enhancing the overall test performance of the quarter suspension fatigue testing machine.

[0043] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A steering loading system for a quarter suspension fatigue testing machine, comprising a steering loading unit (1), a steering gear mounting seat (5) and a steering gear (3) mounted on the steering gear mounting seat (5), characterized in that: The bottom end of the steering loading unit (1) is connected to a universal coupling (2); the steering gear (3) comprises a steering gear support (32) arranged on the steering gear mounting seat (5); a gear transmission assembly (31) is mounted on the steering gear support (32); the gear transmission assembly (31) comprises a gear shaft (313) and a rack shaft (312) in meshing connection; the universal coupling (2) is connected to the gear shaft (313); both ends of the rack shaft (312) are connected to a fixture (8); a suspension to be tested is mounted on the fixture (8); and steering loading tests are performed on two suspensions simultaneously by rotationally driving the steering loading unit (1).

2. The steering loading system for a quarter suspension fatigue testing machine according to claim 1, characterized in that: The gear transmission assembly (31) also includes a rack seat (311) mounted on the steering gear support (32), the rack shaft (312) being mounted inside the rack seat (311), the rack seat (311) being sleeved with a gear seat (314), and the gear shaft (313) being mounted inside the gear seat (314).

3. The steering loading system for a quarter suspension fatigue testing machine according to claim 2, characterized in that: The steering gear (3) further comprises an elastic support device (33), wherein the elastic support device (33) is arranged inside the gear seat (314) and is used to support the rack shaft (312) to prevent the rack shaft from deforming.

4. The steering loading system for a quarter suspension fatigue testing machine according to claim 3, characterized in that: The elastic support device (33) includes a top block (331) arranged inside the gear seat (314) and overlapped with the rack shaft (312), a pressure block (332) is arranged on the other side of the top block (331), an elastic component (333) sleeved on the pressure block (332), a pressure ring (334) overlapped with the elastic component (333) and sleeved on the other end of the pressure block (332), an adjustment bolt (335) arranged on the other side of the pressure ring (334) and a locking bolt (336) installed on the other side of the adjustment bolt (335).

5. The steering loading system for a quarter suspension fatigue testing machine according to claim 2, characterized in that: Rack end covers (318) are fixedly mounted on both ends of the rack seat (311), bearing covers (316, 317) are fixedly mounted on the gear seat (314) and at both axial ends of the gear shaft (313), and clamping nuts (315) are located on both sides of the gear seat (314) and sleeved on the rack seat (311).

6. The steering loading system for a quarter suspension fatigue testing machine according to claim 1, characterized in that: The steering loading unit (1) comprises a support column (11), the bottom end of the support column (11) is connected to a reducer mounting plate (15) through a steering support rod (12), a reducer (14) is arranged on the reducer mounting plate (15), the top end of the reducer (14) is connected to a servo motor (13), the bottom end of the reducer (14) is connected to a half coupling (16), the half coupling (16) is connected to an output shaft (17), and the output shaft (17) is connected to the universal coupling (2).

7. The steering loading system for a quarter suspension fatigue testing machine according to claim 1, characterized in that: A scale (7) is fixedly mounted on one side of the steering gear mounting seat (5), and a pointer (6) is mounted at the bottom end of the steering gear (3) and close to the scale (7).

8. The steering loading system for a quarter suspension fatigue testing machine according to any one of claims 1 to 7, characterized in that: The steering gear (3) is provided with a steering gear adjusting device (4), and the steering gear adjusting device (4) is used to adjust the position of the steering gear (3).

9. The steering loading system for a quarter suspension fatigue testing machine according to claim 8, characterized in that: The steering gear adjustment device (4) comprises a nut (41) mounted on the bottom end of the steering gear (3), a screw rod (44) passing through the nut (41), and a bearing seat (43) sleeved on one end of the screw rod (44); the bearing seat (43) is fixedly mounted on the steering gear mounting seat (5).

10. The steering loading system for a quarter suspension fatigue testing machine according to claim 9, characterized in that: An adjustable bearing cover (42) is sleeved and mounted on the screw rod (44), and the adjustable bearing cover (42) is fixedly connected to the bearing seat (43).

Images