Performance test equipment for automobile electric power steering

Abstract

The present application discloses a performance test equipment for an automotive electric power steering gear, which belongs to the technical field of commutator testing. It includes a test platform; a test box, which is arranged at the top of the test platform, and the electric power steering gear to be tested is placed in the test box, and at least one side of the test box is connected to an air intake pipe to introduce gas with a temperature suitable for the test environment into the test box; a power mechanism, which is arranged on one side of at least one reversing shaft of the electric power steering gear, and the test mechanism includes a driving shaft driven by the corresponding reversing shaft, and a torque sensor is arranged on one side of the driving shaft. The present application transports low-temperature gas or high-temperature gas into the test box through the air intake pipe, so that the equipment can test the electric power steering gear at different temperatures, and achieves the technical effect of simulating different temperature environments to test the service life of the commutator.

Description

Technical Field

[0001] The present application relates to the technical field of commutator testing, and more specifically, to performance testing equipment for an automotive electric power steering device. Background Art

[0002] The performance test of automotive electric power steering covers many aspects, including but not limited to fatigue endurance test, performance test, environmental test, electrical performance test, EMC test, green environmental protection test and chemical regulatory compliance services.

[0003] In the related technology, accurate detection of electric power steering is achieved. For example, the patent with the prior art publication number CN117782645A provides a performance test equipment for automobile electric power steering. The device realizes the reciprocating movement between the ball head and the resistance loading assembly by utilizing the reciprocating movement of the damping rod and the pressure stabilizer in the liquid reservoir, and uses hydraulic oil to reduce the friction loss between the damping rod, the pressure stabilizer and the liquid reservoir, thereby improving the accuracy of the test results of the electric power steering. The first through hole on the pressure stabilizer is used to provide a channel for the hydraulic oil in the liquid reservoir. During the test of the electric power steering, the hydraulic oil shuttles back and forth in the first through hole to form resistance, and the size of the resistance and the swing angle of the flexible damping member can form a fixed resistance curve, thereby avoiding the problem that a fixed resistance curve cannot be formed between the ball head and the swing arm in the prior art, thereby further improving the accuracy of the test results of the electric power steering.

[0004] Although the above-mentioned existing technical solutions can achieve the effect of accurately testing the automobile electric power steering through the cooperation of the damping element and the voltage stabilizer, the test equipment is relatively open as a whole, and it is difficult to simulate the use of the commutator at different temperatures, and it is impossible to test the operating temperature range and service life of the commutator. Summary of the invention

[0005] The purpose of this application is to provide performance testing equipment for an automotive electric power steering device, which solves the technical problem that the service life of the commutator cannot be tested under different temperature environments, and achieves the technical effect of simulating different temperature environments to test the service life of the commutator.

[0006] The present application provides a performance test equipment for an automotive electric power steering device, including:

[0007] Test platform, providing a working surface for performance testing;

[0008] A test box is arranged on the top of the test platform, and the electric power steering gear to be tested is placed in the test box. At least one side of the test box is connected to an air intake pipe to introduce gas with a temperature suitable for the test environment into the test box;

[0009] A power mechanism is configured to provide power for a performance test of the electric power steering gear, wherein a power output end of the power mechanism is connected to a torsion shaft of the electric power steering gear;

[0010] The testing mechanism is arranged on one side of at least one reversing shaft of the electric power steering device, and the testing mechanism comprises a driving shaft driven by the corresponding reversing shaft, and a torque sensor is arranged on one side of the driving shaft.

[0011] Preferably, the power mechanism comprises:

[0012] A driving motor is arranged on one side of the electric power steering gear to be tested;

[0013] A transmission shaft connected to the output shaft end of the driving motor;

[0014] A sleeve, a sliding sleeve, is arranged on the outside of the transmission shaft, and the sleeve and the transmission shaft can rotate synchronously;

[0015] The universal joint is connected to the end of the shaft sleeve away from the transmission shaft, and the universal joint is connected to the torque shaft of the electric power steering device to be tested.

[0016] Preferably, the testing mechanism further comprises a driving plate, and the driving plate is connected to one side of the corresponding reversing shaft through a connecting member;

[0017] Wherein, the connecting piece can make the reversing shaft and the driving plate move synchronously;

[0018] The driving shaft is arranged on one side of the driving plate so that the driving shaft can be driven to rotate when the driving plate moves.

[0019] Preferably, the driving plate is a driving toothed plate connected to one side of the reversing shaft;

[0020] The driving shaft is a driving gear meshed with one side of the driving synchronous gear plate.

[0021] Preferably, the testing mechanism further comprises:

[0022] A connecting pipe is arranged on the outer side of the corresponding torque sensor;

[0023] A resistance member is connected to one side of the driving shaft, and the resistance member can change the rotation resistance of the driving shaft to adjust the test resistance of the reversing shaft.

[0024] Preferably, the resistance member comprises:

[0025] A resistance rod is connected to one side of the driving shaft, and the resistance rod is arranged in the connecting pipe;

[0026] The moving block is sleeved on the outside of the resistance rod. The moving block is configured in a connecting tube, and the connecting tube is filled with a resistance medium. Under different test resistances, the moving block is subject to different resistances when it is driven by the resistance rod to move.

[0027] Preferably, the resistance member further comprises:

[0028] Valve pipes are arranged at both ends of the connecting pipe, and the valve pipes are connected with the connecting pipes through medium channels opened at the ends of the connecting pipes;

[0029] The valve core is arranged in the valve tube, one end of the valve core is connected to an elastic member, and the valve core can be pressed against the medium channel under the action of the elastic member; and when the moving block moves toward one side, it can push the resistance medium on the side, so that the resistance medium pushes the valve core to move;

[0030] The driving block is arranged on a side of the elastic member away from the valve core, and the driving block can be driven to move in the corresponding valve tube.

[0031] Preferably, the resistance member further comprises:

[0032] The delivery pipe is connected and arranged at the top end of the corresponding valve pipe. When the valve core contacts the medium channel, the connection between the delivery pipe and the valve pipe can be cut off. During testing, the resistance medium pushes the valve core to move so that the delivery pipe is connected with the valve core.

[0033] Preferably, the test mechanism is configured with two groups, and the two groups of test mechanisms correspond to the two reversing shafts of the electric power steering respectively;

[0034] The testing organization also includes:

[0035] A first rod body, connected to one side of the corresponding driving plate, and the first rod body moves with the driving plate during testing;

[0036] A second rod body connected to one side of the first rod body, and the second rod body is fixed relative to the test platform during testing;

[0037] The distance measuring component is arranged at the end of the first rod body / the second rod body, and the distance measuring component can detect the moving distance of the first rod body relative to the second rod body.

[0038] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0039] (1) The present application delivers low-temperature gas or high-temperature gas to the test box through an air intake pipe, so that the equipment can test the electric power steering gear at different temperatures, thereby solving the problem that the service life of the commutator cannot be tested under different temperature environments, thereby achieving the technical effect of simulating different temperature environments to test the service life of the commutator;

[0040] (2) The present application provides a connecting piece between the reversing shaft and the driving plate for connection, so that when the reversing shaft moves back and forth, there is no rotation or sliding between the connecting piece and the driving plate and the reversing shaft, which can better reduce the friction between the equipment structures and improve the use effect of the equipment;

[0041] (3) This application realizes the basic function of the device to detect the output power of the electric power steering gear by arranging a driving shaft on the outer side of the driving plate, so that the torque sensor detects the output power of the electric power steering gear by detecting the torque of the driving shaft, thereby ensuring the use effect of the device;

[0042] (4) The present application provides a positioning mechanism at the bottom of the electric power steering gear, so as to position and install the electric power steering gear, detect whether the two sides of the electric power steering gear are symmetrical, and control the power-assisted motor to fine-tune the two ends of the electric power steering gear through the test host, so that the electric power steering gear can be easily and symmetrically installed on the car in the future, thereby increasing the practicality of the device;

[0043] (5) The present application provides an electric push rod on the outside of the valve core. By squeezing the elastic member through the electric push rod, the resistance of the valve core to the connecting pipe can be changed, thereby changing the resistance provided by the device when detecting the electric power steering gear, thereby improving the practicality of the device and improving the use effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the overall structure of the performance testing equipment of the electric power steering device for an automobile disclosed in the embodiment of the present application;

[0045] Figure 2 It is a structural schematic diagram of a test platform in a performance test equipment for an automotive electric power steering device disclosed in an embodiment of the present application;

[0046] Figure 3 It is a schematic diagram of the assembly structure of each mechanism in the performance testing equipment of the automotive electric power steering device disclosed in the embodiment of the present application;

[0047] Figure 4 It is a structural schematic diagram of a test box in the performance test equipment of an automotive electric power steering device disclosed in an embodiment of the present application;

[0048] Figure 5 It is a structural schematic diagram of a power mechanism in a performance testing equipment for an automotive electric power steering device disclosed in an embodiment of the present application;

[0049] Figure 6 It is a structural schematic diagram of a positioning mechanism and a testing mechanism in a performance testing equipment for an automotive electric power steering device disclosed in an embodiment of the present application;

[0050] Figure 7 It is a schematic diagram of the assembly structure of the positioning mechanism and the test platform in the performance test equipment of the automotive electric power steering device disclosed in the embodiment of the present application;

[0051] Figure 8 It is a structural schematic diagram of a testing mechanism in a performance testing equipment for an automotive electric power steering device disclosed in an embodiment of the present application;

[0052] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure of the middle part A;

[0053] Fig.10 It is a structural schematic diagram of a resistance rod in a performance testing equipment for an automotive electric power steering device disclosed in an embodiment of the present application;

[0054] Fig.11 A schematic diagram of the internal structure of a resistance member in a performance testing device for an automotive electric power steering device disclosed in an embodiment of the present application;

[0055] Fig.12 It is a schematic structural diagram of an electric power steering device in a performance testing equipment for an electric power steering device for an automobile disclosed in an embodiment of the present application.

[0056] Description of the numbers in the figure:

[0057] 100, electric power steering gear; 1001, torque shaft; 1002, reversing shaft; 1003, connector; 1004, data cable A; 1005, male plug; 1006, mounting plate; 1007, power motor;

[0058] 1. Test platform; 11. Slideway; 12. Slide column;

[0059] 2. Test box; 21. First air inlet pipe; 22. Second air inlet pipe; 23. Protective cover; 231. Through port; 24. Protective door panel; 25. Baffle; 26. Support plate;

[0060] 3. Power mechanism; 31. Drive motor; 32. Transmission shaft; 33. Bushing; 34. Sealing plate A; 35. Universal joint; 36. Data cable C; 37. Test host; 38. Data cable B; 39. Female plug; 310. Rotating plate;

[0061] 4. Positioning mechanism; 41. Positioning block; 42. Sliding block; 43. Synchronous gear plate; 44. Synchronous gear; 45. Sealing plate B; 451. Sliding port;

[0062] 5. Testing mechanism; 51. Driving plate; 511. First rod body; 512. Second rod body; 513. Distance measuring member; 52. Driving shaft; 53. Torque sensor; 531. Resistance rod; 5311. Threaded connection block; 5312. Moving block; 5313. Limit rod; 54. Connecting pipe; 55. Valve core; 551. Valve pipe; 56. Elastic member; 57. Driving block; 58. Electric push rod; 59. Delivery pipe; 510. Oil tank. DETAILED DESCRIPTION

[0063] The present application is further described in detail below in conjunction with the accompanying drawings.

[0064] Reference Figure 1 , Figure 3 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 and Fig.12 The embodiment of the present application discloses performance testing equipment for an automobile electric power steering device, including a test platform 1, a test box 2 is arranged on the top of the test platform 1, an electric power steering device 100 is arranged inside the test box 2, a torsion shaft 1001 is arranged on the top of the electric power steering device 100, two reversing shafts 1002 are arranged on the outside of the electric power steering device 100, and an intake pipe is arranged on the outside of the test box 2, and the intake pipe is used to inject gas of a predetermined test environment temperature into the test box 2 under test; in a specific scheme of the present application, a first intake pipe 21 and a second intake pipe 22 are arranged on the outside of the test box 2, and the first intake pipe 21 and the second intake pipe 22 are respectively used to transport low-temperature gas and high-temperature gas to the inside of the test box 2.

[0065] In a specific scheme, a protective cover 23 is provided on the top of the test box 2, and a power mechanism 3 is provided inside the protective cover 23. The power mechanism 3 includes a universal joint 35, and the universal joint 35 is detachably arranged on the outside of the torsion shaft 1001; a positioning mechanism 4 is also provided inside the test box 2 for positioning and installing the electric power steering gear 100; two test mechanisms 5 are symmetrically arranged on the top of the test platform 1, and the two test mechanisms 5 are both located on the outside of the test platform 1.

[0066] The two test mechanisms 5 each include a driving plate 51, the ends of the two driving plates 51 are horizontally arranged with the reversing shaft 1002 through a connecting piece 1003, and the tops of the two driving plates 51 are each provided with a driving shaft 52, and when the driving plates 51 are moved by the reversing shaft 1002, the driving shaft 52 can be driven to rotate, and a torque sensor 53 is provided on one side of the two driving shafts 52 for detecting the power output by the electric power steering device 100;

[0067] The torsion shaft 1001 is clamped with the universal joint 35 so that the power mechanism 3 can drive the torsion shaft 1001 to rotate and provide power for the test. The two driving plates 51 are respectively connected to the corresponding reversing shafts 1002 through the two connecting members 1003. When the reversing shaft 1002 moves back and forth, there is no rotation or sliding between the connecting member 1003 and the driving plate 51 and the reversing shaft 1002, which can better reduce the friction between the equipment structures and reduce wear. The bottom of the electric power steering device 100 is connected through the positioning mechanism 4 to complete the positioning and installation of the equipment. The equipment is tested through the power input of the power mechanism 3. During the test, test gases of different temperatures are input into the test box 2 through the first air intake pipe 21 or the second air intake pipe 22 to change the temperature of the equipment during the test. The driving plate 51 is connected to the reversing shaft 1002 so that the driving plate 51 drives the driving shaft 52 to rotate. The torque of the driving shaft 52 is tested by the torque sensor 53 to detect the power output of the electric power steering device 100 and complete the test function of the equipment.

[0068] The above technical solution can adjust the temperature inside the test box 2 during the test through the air intake pipe, which solves the technical problem that the commutator service life cannot be tested under different temperature environments, and achieves the technical effect of simulating different temperature environments to test the commutator service life.

[0069] Reference Figure 3 , Figure 5 and Fig.12 The power mechanism 3 also includes a driving motor 31, which is rotatably arranged inside the protective cover 23 through a rotating plate 310. A transmission shaft 32 is fixedly arranged at the output end of the driving motor 31, and a shaft sleeve 33 is sleeved at the bottom of the transmission shaft 32. The bottom of the shaft sleeve 33 is connected to the torque shaft 1001 through a universal joint 35.

[0070] When the universal joint 35 is connected to the torsion shaft 1001, the universal joint 35 can rotate, which is convenient for the installation of the electric power steering device 100. At the same time, the driving motor 31 is arranged to rotate inside the rotating plate 310 and the protective cover 23, so that the equipment can be better installed.

[0071] Reference Figure 1 , Figure 4 and Figure 5 A sealing plate A34 is fixedly arranged on the outer side of the shaft sleeve 33 , and a through opening 231 is opened at the bottom of the protective cover 23 .

[0072] The through opening 231 can be sealed by the sealing plate A34 to prevent hot air or cold air inside the test box 2 from entering the protective cover 23 through the through opening 231 and affecting the normal operation of the drive motor 31 .

[0073] Reference Figure 3 , Figure 5 and Fig.12A data cable C36 is provided on the outside of the driving motor 31, one end of the data cable C36 is connected to the test host 37, a data cable B38 is provided on the bottom of the test host 37, one end of the data cable B38 is provided with a female plug 39, a power-assist motor 1007 is provided on the top of the electric power steering gear 100, a male plug 1005 is provided on one side of the power-assist motor 1007 through the data cable A1004, and the female plug 39 matches the male plug 1005.

[0074] The test host 37 controls the operation of the drive motor 31 through the data line C36, and the test host 37 can transmit the control signal to the power-assisting motor 1007 through the male plug 1005 and the data line A1004 through the data line B38 and the female plug 39, thereby ensuring that the test host 37 controls the operation of the drive motor 31 and the power-assisting motor 1007.

[0075] Reference Figure 2 , Figure 3 , Figure 6 and Figure 7 The positioning mechanism 4 includes two positioning blocks 41. A mounting plate 1006 is provided at the bottom of the electric power steering gear 100. The two positioning blocks 41 are installed with the electric power steering gear 100 through the mounting plate 1006. Slide blocks 42 are fixedly provided at the bottom of the two positioning blocks 41. Two slide grooves 11 matching the slide blocks 42 are provided at the top of the test platform 1. Synchronous gear plates 43 are fixedly provided at the bottom of the two slide blocks 42. Synchronous gear plates 43 are provided at the sides close to each other with synchronous gears 44 meshing with each other.

[0076] When one of the positioning blocks 41 moves, it can drive the slider 42 connected to it to move, thereby driving the synchronous gear plate 43 to move. When the synchronous gear plate 43 moves, it can drive the synchronous gear 44 to rotate, thereby driving the other synchronous gear plate 43 to move, so that the other synchronous gear plate 43 drives the slider 42 and the positioning block 41 connected to it to move, so that the positions of the two positioning blocks 41 are always symmetrically set, ensuring that the electric power steering gear 100 is in a symmetrical state at both ends when the equipment is installed with the electric power steering gear 100.

[0077] Reference Figure 3 , Figure 6 and Figure 7 The outer sides of the two synchronous gear plates 43 are slidably provided with sealing plates B45, the tops of the two sealing plates B45 are provided with sliding openings 451, and the bottom of the test platform 1 is fixedly provided with two sliding columns 12 matching the sliding openings 451.

[0078] When the two synchronous tooth plates 43 move, they can drive the sealing plate B45 to move. The sealing plate B45 moves along the direction of the sliding port 451 through the limit of the sliding column 12. When the synchronous tooth plates 43 move, the sealing plate B45 can seal the two sliding columns 12 to prevent the cold air or hot air inside the test box 2 from escaping.

[0079] Reference Figure 3 , Figure 8 , Fig. 9 and Fig.10 A first rod 511 is fixedly disposed at the bottom of the two driving plates 51, a second rod 512 is slidably disposed on the outer sides of the two first rods 511, and a distance measuring member 513 is disposed on one side of the two first rods 511 or the two second rods 512.

[0080] By moving the two driving plates 51, the two first rods 511 can be driven to move relative to the corresponding second rods 512. The two distance measuring components 513 respectively detect the distances moved by the two first rods 511 relative to the corresponding second rods 512. By comparing the values ​​detected by the two distance measuring components 513, it can be determined whether the reversing shafts 1002 at both ends of the electric power steering device 100 are symmetrical, and the power-assisted motor 1007 can be controlled by the test host 37 to fine-tune it to make it symmetrical, which is convenient for the subsequent installation of the electric power steering device 100 on the car.

[0081] Reference Figure 3 , Figure 8 , Fig. 9 and Fig.10 The outer sides of the two torque sensors 53 are both sleeved with connecting tubes 54, and a resistance member is provided on one side of the connecting tube 54, wherein the resistance member is connected to one side of the driving shaft 52, and the resistance member can change the rotational resistance of the driving shaft 52 to adjust the test resistance of the reversing shaft 1002.

[0082] In a specific scenario, Fig. 9 , Fig.10 and Fig.11 As shown, the resistance member includes a resistance rod 531 connected to one side of the driving shaft 52, and the test resistance of the reversing shaft 1002 is adjusted by adjusting the rotational resistance of the resistance rod 531; wherein, a moving block 5312 is arranged on the outer side of the resistance rod 531, and when the resistance rod 531 rotates, it can drive the movement of the moving block 5312, wherein the moving block 5312 divides the connecting tube 54 into two parts, and the two parts are both filled with resistance medium, and under different test resistances, the moving block 5312 encounters different resistances when moving.

[0083] Among them, the resistance rod 531 can be a one-way screw, and the moving block 5312 is configured on the outside of the one-way screw through a threaded connecting block 5311. When the one-way screw rotates, it can drive the moving block 5312 to move in the connecting tube 54; the resistance medium can be a gas or oil filled in the connecting tube 54.

[0084] In the above technical solution, the moving resistance of the moving block 5312 can be adjusted by injecting different resistance media into the connecting tube 54, thereby adjusting the rotational resistance of the one-way screw.

[0085] In a specific scenario, again Fig.11 As shown, the resistance member also includes valve tubes 551 arranged at both ends of the connecting tube, and the valve tube 551 is connected to the connecting tube 54 through a medium channel opened on the end side of the connecting tube 54; a valve core 55 is arranged in the valve tube 551, and one end of the valve core 55 is connected to an elastic member 56, and the valve core 55 can be in contact with the medium channel under the action of the elastic member 56; and when the moving block 5312 moves toward one side, it can push the resistance medium on that side, so that the resistance medium pushes the valve core 55 to move; a driving block 57 is also arranged on the side of the elastic member 56 away from the valve core 55, and the driving block 57 can be driven to move in the corresponding valve tube 551.

[0086] In the above technical solution, by arranging the valve tube 551 and the valve core 55 on both sides of the connecting tube 54, the moving resistance of the moving block 5312 can be indirectly adjusted by adjusting the moving resistance of the valve core 55; by adjusting the position of the driving block 57 in the corresponding valve tube 551, the elastic member 56 is deformed to different degrees, so as to facilitate the adjustment of the moving resistance of the valve core 55.

[0087] In the above technical solution, the movement resistance of the valve core 55 is increased by moving the driving block 57 toward the valve core 55 side, and different positions of the driving block 57 represent different test resistances. If under this resistance, the moving block 5312 can move driven by the resistance rod 531 to cause the valve core 55 to move slightly, it means that the torque reaches the preset value, and the preset torque value corresponds to the maximum output of the electric power steering.

[0088] The movement of the driving block 57 can be driven by a threaded rod arranged on one side thereof, or can be driven by an electric push rod 58 arranged on one side thereof.

[0089] Based on the above explanation, the driving block 57 is used to test whether the driving shaft 52 can reach the preset torque value at different positions in the valve tube 551, but the movement of the valve core 55 cannot be observed intuitively. If the moving block 5312 continues to move after the valve core 55 moves, it means that the electric power steering is working at a super-maximum output at this time.

[0090] In a better solution, the resistance member also includes a delivery pipe 59 connected to the top end of the corresponding valve pipe 551, which can cut off the connection between the delivery pipe 59 and the valve pipe 551 when the valve core 55 hits the medium channel; during testing, the resistance medium pushes the valve core 55 to move, so that the delivery pipe 59 is connected to the valve core 55.

[0091] In the above technical solution, when the valve core 55 moves, it indicates that the driving shaft 52 can reach the preset torque value, and the test requirements are met at this time. In order to prevent the electric power steering device from continuing to work in a manner exceeding the maximum output, after the valve core 55 moves, the delivery pipe 59 is connected to the corresponding valve pipe 551, so that the resistance medium can be output through the delivery pipe 59. On the one hand, it can prevent the increase in the moving resistance of the moving block 5312 from causing damage to the electric power steering device. On the other hand, the resistance medium of the oil body can be visually observed to escape from the delivery pipe 59 to visually determine whether the test requirements have been met.

[0092] It is understandable that when the resistance medium is oil, the other end of the delivery pipe 59 is connected to an oil tank 510 , which can carry the oil escaping from the delivery pipe 59 and also provide resistance medium for the connecting pipe 54 .

[0093] It should also be noted that in the above technical solution, when the moving block 5312 is directed toward one side (such as Fig.11 When the block 5312 moves on the other side (such as the M side), the resistance medium (such as oil) can push the valve core 55 to move, and then the resistance medium escapes from the delivery pipe 59 corresponding to this side. In order to ensure that the test equipment can continue to test the performance of the electric power steering device 100, the other side (such as the M side) of the moving block 5312 is moved. Fig.11 The resistance medium is injected into the connecting pipe 54 through the delivery pipe 59 corresponding to the N side of the valve core. Since the valve core 55 corresponding to the other side is in contact with the medium channel at this time, in order to ensure that the resistance medium can be smoothly injected into the connecting pipe, an injection hole for the delivery pipe 59 to connect the medium channel can be opened on the valve core, and a one-way valve is arranged in the injection hole to ensure that the injection hole can only enter the medium channel through the delivery pipe 59 and cannot move in the opposite direction; in addition, the position of the valve core on the corresponding side (N side) can also be adjusted by the driving block 57. For example, in the embodiment in which the driving block 57 is driven by the electric push rod 58, the valve core is no longer in contact with the medium channel through the electric push rod 58, so that the resistance medium can enter the connecting pipe 54 on the corresponding side through the delivery pipe 59.

[0094] In another embodiment, a limiting rod 5313 is provided on the inner side of the threaded connection block 5311 , and both ends of the limiting rod 5313 are respectively fixed to the inside of the corresponding connecting pipe 54 ; the limiting rod 5313 can limit the corresponding threaded connection block 5311 .

[0095] Reference Figure 1 and Figure 3 A protective door plate 24 is rotatably provided on the outer side of the test box 2, and a baffle 25 is provided on the outer side of the protective cover 23 to prevent the power mechanism 3 inside the protective cover 23 from being damaged.

[0096] The protective door plate 24 can provide a protective effect for the electric power steering device 100 during detection, and can seal the test box 2 during detection to prevent cold air or hot air from escaping. The baffle 25 is used to protect the power mechanism 3.

[0097] Reference Figure 3 and Figure 4 A support plate 26 is fixedly provided inside the test box 2 for placing the data cable A1004 and the male plug 1005.

[0098] The data line A1004 and the male plug 1005 can be supported by the support plate 26, so as to prevent the data line A1004 from being too long and being difficult to place inside the test box 2, thereby improving the use effect of the equipment.

[0099] In summary, when the performance testing equipment for the electric power steering gear of an automobile disclosed in the embodiment of the present application is used, the torsion shaft 1001 is clamped with the universal joint 35. When the universal joint 35 is connected to the torsion shaft 1001, the universal joint 35 can rotate, which is convenient for the installation of the electric power steering gear 100. At the same time, the driving motor 31 is arranged to rotate internally with the rotating plate 310 and the protective cover 23, so that the equipment can be better installed. The power mechanism 3 can drive the torsion shaft 1001 to rotate to provide power for the test. The two driving plates 51 are respectively connected to the corresponding reversing shafts 1002 through two connecting members 1003. When the reversing shaft 1002 moves back and forth, there is no rotation or sliding between the connecting member 1003 and the driving plate 51 and the reversing shaft 1002, which can better reduce the friction between the equipment structures and reduce wear.

[0100] The bottom of the electric power steering gear 100 is connected through the positioning mechanism 4 to complete the positioning and installation of the equipment, and the equipment is tested through the power input of the power mechanism 3. During the test, low-temperature gas or high-temperature gas is input into the test box 2 through the first intake pipe 21 or the second intake pipe 22 to change the temperature of the equipment during testing. The driving plate 51 is connected to the reversing shaft 1002 so that the driving plate 51 drives the driving shaft 52 to rotate. The torque of the driving shaft 52 is tested through the torque sensor 53 to detect the power output of the electric power steering gear 100, thereby completing the testing function of the equipment.

[0101] By squeezing the elastic member 56 by the electric push rod 58, the resistance of the valve core 55 to the connecting pipe 54 can be changed, which is convenient for changing the resistance of the test. The equipment can change the temperature inside the test box 2 during the test, which solves the technical problem that the service life of the commutator cannot be tested under different temperature environments, and achieves the technical effect of simulating different temperature environments to test the service life of the commutator.

Claims

1. Performance test equipment for automobile electric power steering, characterized in that: include: A test platform (1) provides a working surface for performance testing; A test box (2) is arranged on the top of the test platform (1), the electric power steering gear (100) to be tested is placed in the test box (2), and at least one side of the test box (2) is connected to an air intake pipe for introducing gas at a temperature suitable for the test environment into the test box (2); A power mechanism (3) is configured to provide power for a performance test of an electric power steering gear (100), wherein a power output end of the power mechanism (3) is connected to a torque shaft (1001) of the electric power steering gear (100); A testing mechanism (5) is arranged on one side of at least one reversing shaft (1002) of an electric power steering device (100), the testing mechanism (5) comprising: A driving shaft (52) driven by a corresponding reversing shaft (1002), wherein a torque sensor (53) is disposed on one side of the driving shaft (52); A driving plate (51), wherein the driving plate (51) is connected to one side of a corresponding reversing shaft (1002) via a connecting member (1003); wherein the connecting member (1003) enables the reversing shaft (1002) and the driving plate (51) to move synchronously; and the driving shaft (52) is transmission-disposed on one side of the driving plate (51), so that when the driving plate (51) moves, the driving shaft (52) can be driven to rotate; A connecting pipe (54) is arranged on the outer side of the corresponding torque sensor (53); a resistance member connected to one side of the driving shaft (52), the resistance member being capable of changing the rotational resistance of the driving shaft (52) to adjust the test resistance of the reversing shaft (1002); Wherein, the resistance element comprises: A resistance rod (531) is connected to one side of the driving shaft (52), and the resistance rod (531) is disposed in the connecting tube (54); The moving block (5312) is sleeved on the outside of the resistance rod (531), the moving block (5312) is arranged in the connecting tube (54), and the connecting tube (54) is filled with a resistance medium. Under different test resistances, the moving block (5312) is subjected to different resistances when being driven by the resistance rod (531) to move; Valve pipes (551) are arranged at both ends of the connecting pipe (54), and the valve pipe (551) is connected to the connecting pipe (54) through a medium channel opened at the end side of the connecting pipe (54); The valve core (55) is arranged in the valve tube (551), and one end of the valve core (55) is connected to an elastic member (56). The valve core (55) can be pressed against the medium channel under the action of the elastic member (56); and when the moving block (5312) moves toward one side, it can push the resistance medium on that side, so that the resistance medium pushes the valve core (55) to move; The driving block (57) is arranged on a side of the elastic member (56) away from the valve core (55), and the driving block (57) is driven to move in the corresponding valve tube (551).

2. The performance testing equipment for the electric power steering device of an automobile according to claim 1, characterized in that: The power mechanism (3) comprises: A drive motor (31) is arranged on one side of the electric power steering device (100) to be tested; A transmission shaft (32) connected to an output shaft end of the drive motor (31); A shaft sleeve (33), a sliding sleeve arranged on the outside of the transmission shaft (32), the shaft sleeve (33) and the transmission shaft (32) being capable of rotating synchronously; The universal joint (35) is connected to one end of the shaft sleeve (33) away from the transmission shaft (32), and the universal joint (35) is connected to the torque shaft (1001) of the electric power steering device (100) to be tested.

3. The performance testing equipment for an automotive electric power steering device according to claim 1, characterized in that: The driving plate (51) is a driving toothed plate connected to one side of the reversing shaft (1002); The driving shaft (52) is a driving gear meshed with one side of the driving synchronous gear plate (43).

4. The performance testing equipment for an automotive electric power steering device according to claim 1, characterized in that: The resistance member also includes: The delivery pipe (59) is arranged at the top end of the corresponding valve pipe (551) and can cut off the connection between the delivery pipe (59) and the valve pipe (551) when the valve core (55) contacts the medium channel; during testing, the resistance medium pushes the valve core (55) to move so that the delivery pipe (59) and the valve core (55) are connected.

5. The performance testing equipment for the electric power steering device of an automobile according to claim 1, characterized in that: The test mechanism (5) is configured in two groups, and the two groups of the test mechanism (5) respectively correspond to the two reversing shafts (1002) of the electric power steering device (100); The testing mechanism (5) further comprises: A first rod body (511) connected to one side of a corresponding driving plate (51), wherein the first rod body (511) moves along with the driving plate (51) during testing; A second rod body (512) connected to one side of the first rod body (511), and the second rod body (512) is fixed relative to the test platform (1) during testing; The distance measuring component (513) is arranged at the end of the first rod body (511) / the second rod body (512), and the distance measuring component (513) is capable of detecting the moving distance of the first rod body (511) relative to the second rod body (512).

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