Fatigue testing device for automobile steering system

Abstract

The utility model relates to an automobile steering system fatigue testing device, which relates to the technical field of steering system testing and comprises a testing table, a first clamp is adjustably mounted on the testing table, an upper steering shaft of a steering system is detachably mounted on the first clamp, and a fatigue testing motor is fixedly mounted on the first clamp. The fatigue test motor is connected with the end part of the upper steering shaft through a connecting piece; two second clamps are adjustably installed on the table top of the test table, the two ends of the lower steering shaft are detachably installed on the two second clamps respectively, and swing arm simulation mechanisms are installed on the second clamps respectively. The usability of the automobile steering system fatigue testing device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of steering system test technology, in particular to a kind of automobile steering system fatigue test device. BACKGROUND

[0002] At present, with the continuous development of intelligent driving technology of automobile, electric power steering system as an important part of intelligent driving car, for the design and development of intelligent driving car, sufficient performance test and verification to EPS system are indispensable, it not only needs to be able to provide auxiliary torque for steering system, more needs to be able to meet the steering torque request of intelligent driving controller under different working conditions. In the process of automobile manufacturing, it needs to verify the fatigue durability performance of steering system and verify the product design limit life by means of fatigue test device.

[0003] In the prior art, the common steering system fatigue test device mainly includes a test table, a first clamp and two second clamps for fixing an upper steering shaft and a lower steering shaft of a steering system are installed on the table top of the test table, a fatigue test motor is installed on the first clamp, the fatigue test motor is connected with the upper steering shaft through a connecting piece, and the output torque of the fatigue test motor can simulate the action of the steering system rotating driven by the steering wheel, and the two ends of the lower steering shaft are detachably installed on the connecting seats in the two second clamps through screws.

[0004] However, in the use process of the existing steering system fatigue test device, the installation position of the clamp needs to be adjusted according to the size of the electric power steering system to be tested, and the common steering system fatigue test device cannot adjust the first clamp and the second clamp, so there is room for improvement that cannot adapt to the structure of different models of electric power steering system. CONTENT OF THE INVENTION

[0005] In order to improve the usability of the automobile steering system fatigue test device and improve the fatigue test effect, the present application provides an automobile steering system fatigue test device.

[0006] The automobile steering system fatigue test device provided by the present application adopts the following technical scheme:

[0007] An automobile steering system fatigue test device, comprising a test table, a first clamp is adjustably installed on the test table, an upper steering shaft of a steering system is detachably installed on the first clamp, a fatigue test motor is fixedly installed on the first clamp, and the fatigue test motor is connected with the end of the upper steering shaft through a connecting piece;

[0008] Two second clamps are adjustably mounted on the table top of the test bench, and the lower steering shafts are respectively detachably mounted on the two second clamps, and the swing arm simulation mechanism is respectively mounted on the second clamps.

[0009] By adopting the above technical scheme, in the process of testing the automobile steering system, the operator can fix the upper steering shaft and the lower steering shaft of the steering system through the first clamp and the second clamp, the fatigue test motor is connected with the upper steering shaft, the swing action of the simulation turntable is simulated, and the fatigue test of the steering system is performed. The electric power assisted steering system can be driven by the swing arm simulation mechanism to reciprocate at a given frequency, simulating the movement scenario of the electric power assisted steering system during the movement of the vehicle body. Since the first clamp and the second clamp are adjustably arranged, during actual installation, the operator can adjust the positions of the first clamp and the second clamp according to the size and model of the electric power assisted steering system to be tested, thereby effectively improving the usability of the automobile steering system fatigue test device.

[0010] Preferably, a first base is fixedly mounted on the test bench, a first mounting seat is slidably mounted on the first base, and the first clamp is mounted on the first mounting seat.

[0011] A first lead screw is rotatably mounted on the first base, a first sliding table is threadedly connected to the first lead screw, the first sliding table is fixedly connected to the bottom of the first mounting seat, and a first rocker is fixedly connected to the first lead screw.

[0012] By adopting the above technical scheme, the operator can adjust the position of the first clamp according to the size of the steering system to be tested through the first lead screw, thereby improving the usability of the fatigue test device.

[0013] Preferably, the swing arm simulation mechanism comprises a servo motor, and a cylinder body of the servo motor is fixedly mounted on the second clamp.

[0014] An installation plate is fixedly connected in the second clamp, a driving shaft end of the servo motor is connected with a coupling rod through a coupling, an end of the coupling rod is connected with a connecting seat through a coupling, and the two ends of the lower steering shaft are respectively detachably mounted on the two connecting seats.

[0015] By adopting the above technical scheme, the servo motor drives the two connecting seats to reciprocate at a set frequency, which can synchronously drive the ends of the lower steering shaft mounted between the two connecting seats to reciprocate, thereby simulating the running state of the electric power assisted steering system during the running of the vehicle.

[0016] Preferably, two second bases are slidably connected on the table top of the test bench, and the two second clamps are respectively fixedly mounted on the two second bases.

[0017] Two second lead screws are rotatably installed on the test table, two second sliding tables are threadedly connected to the second lead screws respectively, the two second sliding tables are fixedly installed at the bottom of the two second bases respectively, and second swing arms are fixedly connected to the ends of the two second lead screws respectively.

[0018] By adopting the above technical scheme, the positions of the second clamps can be adjusted according to the size of the tested steering system through the second lead screws, and the usability of the fatigue test device is further improved.

[0019] Preferably, a second mounting seat is adjustably installed on the test table, and a third clamp for mounting a column assembly is fixedly installed on the second mounting seat.

[0020] By adopting the above technical scheme, when the electric power steering system to be tested is a column type electric power steering system, the column assembly can be clamped by the third clamp on the second mounting seat, so that the fatigue test device is applicable to test different types of electric power steering systems, and the usability of the fatigue test device is further improved.

[0021] Preferably, a third base is fixedly installed on the test table, and the second mounting seat is fixedly installed on the third base.

[0022] A third lead screw is rotatably installed on the third base, a third sliding table is threadedly connected to the third lead screw, the third sliding table is fixedly connected to the bottom of the second mounting seat, and a third swing arm is fixedly installed at the end of the third lead screw.

[0023] By adopting the above technical scheme, the positions of the second mounting seat and the third clamp can be adjusted by rotating the third swing arm according to the size of the column type electric power steering system to be tested, and the usability of the fatigue test device is further improved.

[0024] In summary, the automobile steering system fatigue test device has at least one of the following beneficial technical effects:

[0025] 1. The electric power steering system can be driven to reciprocate at a given frequency by the swing arm simulation mechanism, simulating the movement scenario of the electric power steering system during the movement of the vehicle body.

[0026] 2. Since the first clamp and the second clamp are adjustably arranged, the positions of the first clamp and the second clamp can be adjusted according to the size and model of the electric power steering system to be tested during actual installation, and the usability of the automobile steering system fatigue test device can be effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1This is a schematic diagram illustrating the overall structure of the fatigue testing device in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram illustrating the detailed structure of the second fixture in an embodiment of this application.

[0029] Figure 3 This is a schematic diagram illustrating the installation position of the servo motor in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Test bench; 11. First base; 111. First mounting base; 112. First lead screw; 113. First rocker arm; 12. Second base; 13. Second lead screw; 14. Second rocker arm; 15. Second mounting base; 16. Third base; 161. Third lead screw; 163. Third rocker arm; 2. First clamp; 21. Fatigue testing motor; 3. Second clamp; 31. Connecting seat; 33. Mounting plate; 4. Swing arm simulation mechanism; 41. Servo motor; 6. Third clamp. Detailed Implementation

[0031] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0032] Example

[0033] This application discloses a fatigue testing device for an automotive steering system. (Refer to...) Figure 1 and Figure 2 It mainly includes a test bench 1, on which a first fixture 2 is adjustablely installed. The upper steering shaft of the steering system is detachably installed on the first fixture 2. A fatigue testing motor 21 is fixedly installed on the first fixture 2. The fatigue testing motor 21 is connected to the end of the upper steering shaft through a connector.

[0034] Two second clamps 3 are adjustablely mounted on the test bench 1. The two ends of the lower steering shaft are respectively detachably mounted on the two second clamps 3. A swing arm simulation mechanism 4 is installed on each of the second clamps 3.

[0035] During the testing of the automotive steering system, the operator can fix the upper and lower steering shafts of the steering system using the first clamp 2 and the second clamp 3. The fatigue testing motor is connected to the upper steering shaft to simulate the rocking motion of the turntable and perform fatigue testing on the steering system.

[0036] The swing arm simulation mechanism 4 can drive the electric power steering system to swing back and forth at a given frequency, simulating the motion scenario of the electric power steering system during vehicle movement.

[0037] It should be noted that in this embodiment, the servo motor 41 drives its drive shaft to reciprocate at a set frequency, which can synchronously drive the connecting seat 31 to reciprocate so as to drive the lower steering shafts at both ends of the electric power steering system to swing back and forth.

[0038] Since both the first clamp 2 and the second clamp 3 are adjustable, during the actual installation process, the operator can adjust the position of the first clamp 2 and the second clamp 3 according to the size and model of the electric power steering system to be tested, which can effectively improve the usability of the automotive steering system fatigue testing device.

[0039] Reference Figure 1 and Figure 2 A first base 11 is fixedly installed on the test bench 1, and a first mounting seat 111 is slidably installed on the first base 11. A first clamp 2 is installed on the first mounting seat 111. A first lead screw 112 is rotatably installed on the first base 11. A first slide is threadedly connected to the first lead screw 112. The first slide is fixedly connected to the bottom of the first mounting seat 111. A first rocker arm 113 is fixedly connected to the first lead screw 112.

[0040] The first lead screw 112 allows the operator to easily adjust the position of the first clamp 2 according to the dimensions of the steering system to be tested, thereby improving the usability of the fatigue testing device.

[0041] Reference Figure 1 , Figure 2 as well as Figure 3 The swing arm simulation mechanism 4 uses a servo motor 41. The cylinder of the servo motor 41 is fixedly mounted on the second clamp 3. The second clamp 3 is fixedly connected to a mounting plate 33. The drive shaft end of the servo motor 41 is connected to a coupling rod through a coupling. The end of the coupling rod is connected to a connecting seat 31 through a coupling. The two ends of the lower steering shaft are detachably mounted on the two connecting seats 31 respectively.

[0042] The servo motor drives the two connecting seats to swing back and forth at a set frequency, which can synchronously drive the end of the lower steering shaft installed between the two connecting seats to swing back and forth, simulating the operating state of the electric power steering system during vehicle operation.

[0043] Reference Figure 1 Two second bases 12 are slidably connected to the test platform 1, and two second clamps 3 are fixedly installed on the two second bases 12 respectively. Two second lead screws 13 are rotatably installed on the test platform 1, and two second slides are threadedly connected to the two second lead screws 13 respectively. The two second slides are fixedly installed at the bottom of the two second bases 12 respectively, and the ends of the two second lead screws 13 are fixedly connected to the second rocker arms 14 respectively.

[0044] The second clamp 3 can be adjusted in position by the second lead screw 13 according to the size of the tested steering system, further improving the usability of the fatigue test device.

[0045] With reference to Figure 1 The second mount 15 is adjustably mounted on the test bench 1, and the third clamp 6 for mounting the column assembly is fixedly mounted on the second mount 15.

[0046] When the electric power assisted steering system to be tested is a column type electric power assisted steering system, the column assembly can be clamped by the third clamp 6 on the second mount 15, so that the fatigue test device is applicable to test different types of electric power assisted steering systems, further improving the usability of the fatigue test device.

[0047] With reference to Figure 1 The third base 16 is fixedly mounted on the test bench 1, and the second mount 15 is fixedly mounted on the third base 16. The third lead screw 161 is rotatably mounted on the third base 16, and the third slide is threadedly connected to the third lead screw 161. The third slide is fixedly connected to the bottom of the second mount 15, and the third rocker arm 163 is fixedly mounted at the end of the third lead screw 161.

[0048] The position of the second mount 15 and the third clamp 6 can be adjusted by rotating the third rocker arm 163 according to the size of the column type electric power assisted steering system to be tested, further improving the usability of the fatigue test device.

[0049] The implementation principle of the fatigue test device for the automobile steering system is that, in the process of testing the automobile steering system, the upper steering shaft and the lower steering shaft of the steering system can be fixed by the first clamp 2 and the second clamp 3. The fatigue test motor is connected to the upper steering shaft to simulate the swing action of the turntable and perform fatigue test on the steering system. The electric power assisted steering system can be driven to reciprocate at a given frequency by the swing arm simulation mechanism 4, simulating the movement scenario of the electric power assisted steering system during the movement of the vehicle body. Since the first clamp 2 and the second clamp 3 are adjustably arranged, the positions of the first clamp 2 and the second clamp 3 can be adjusted according to the size and model of the electric power assisted steering system to be tested in the actual installation process, effectively improving the usability of the fatigue test device for the automobile steering system.

[0050] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application. Any equivalent changes made according to the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An automobile steering system fatigue test device characterized by comprising: Including test platform (1), first clamp (2) is adjustably installed on the test platform (1), the upper steering shaft of the steering system is detachably installed on the first clamp (2), the fatigue test motor (21) is fixedly installed on the first clamp (2), and the fatigue test motor (21) is connected with the end of the upper steering shaft through a connecting piece; Two second clamps (3) are adjustably installed on the table top of the test platform (1), and the two ends of the lower steering shaft are detachably installed on the two second clamps (3) respectively, and the swing arm simulation mechanism (4) is installed on the second clamp (3) respectively.

2. The fatigue test device for a vehicle steering system according to claim 1, wherein A first base (11) is fixedly installed on the test platform (1), a first mounting seat (111) is slidably installed on the first base (11), and the first clamp (2) is installed on the first mounting seat (111); A first lead screw (112) is rotatably installed on the first base (11), a first sliding table is threadedly connected on the first lead screw (112), the first sliding table is fixedly connected with the bottom of the first mounting seat (111), and a first rocker (113) is fixedly connected with the first lead screw (112).

3. The fatigue test apparatus for a vehicle steering system according to claim 1, wherein The swing arm simulation mechanism (4) comprises a servo motor (41), and the cylinder of the servo motor (41) is fixedly installed on the second clamp (3). An installation plate (33) is fixedly connected in the second clamp (3), the driving shaft end of the servo motor (41) is connected with a shaft connecting rod through a shaft coupling, the end of the shaft connecting rod is connected with a connecting seat (31) through a shaft coupling, and the two ends of the lower steering shaft are detachably installed on the two connecting seats (31) respectively.

4. The fatigue test apparatus for a vehicle steering system according to claim 3, characterized by Two second bases (12) are slidably connected on the table top of the test platform (1), and the two second clamps (3) are fixedly installed on the two second bases (12) respectively. Two second lead screws (13) are rotatably installed on the test platform (1), a second sliding table is threadedly connected on each of the two second lead screws (13), the two second sliding tables are fixedly installed on the bottom of the two second bases (12) respectively, and a second rocker (14) is fixedly connected with the end of each of the two second lead screws (13).

5. The fatigue test apparatus for a vehicle steering system according to claim 1, characterized by A second mounting seat (15) is adjustably installed on the test platform (1), and a third clamp (6) for installing a pipe column assembly is fixedly installed on the second mounting seat (15).

6. The fatigue test apparatus for a vehicle steering system according to claim 5, wherein A third base (16) is fixedly installed on the test platform (1), and the second mounting seat (15) is fixedly installed on the third base (16); A third lead screw (161) is rotatably installed on the third base (16), a third sliding table is threadedly connected on the third lead screw (161), the third sliding table is fixedly connected with the bottom of the second mounting seat (15), and a third rocker (163) is fixedly installed on the end of the third lead screw (161).

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