Steering gear performance test system and test method

Abstract

The present invention discloses a steering gear performance test system and a test method thereof, which relates to the field of automobile steering technology, and includes a vibrator, a tie rod assembly, a steering gear and a data processor, wherein: one end of the tie rod assembly is connected to the vibrator, and the other end of the tie rod assembly is connected to the output end of the steering gear, and a tension pressure sensor is provided on the tie rod assembly; an angle torque sensor is provided at the input end of the steering gear; the steering gear has a first oil chamber and a second oil chamber, the first oil chamber is provided with a first pressure sensor, and the second oil chamber is provided with a second pressure sensor; the tension pressure sensor, the angle torque sensor, the first pressure sensor, and the second pressure sensor are all connected to the data processor. The present invention reflects the road feel performance of the steering gear by comprehensive analysis from multiple aspects such as axial force data, pressure data of the first oil chamber, pressure data of the second oil chamber, and angle torque data, and the test is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of automobile steering, and in particular to a steering gear performance testing system and a testing method thereof. Background Art

[0002] As users' requirements for vehicle comfort are getting higher and higher, vehicle manufacturers' requirements for the performance of various components are also getting higher and higher. In order to adapt to market demand, the main engine manufacturers and supporting manufacturers have continued to improve their products. For hydraulic steering gears, the user's steering road feel is very important. Therefore, any hydraulic power steering gear should be tested for road feel performance before leaving the factory. Only when the road feel performance meets the standard can it be shipped and sold. There is no test device specifically used to test the road feel performance of various types of hydraulic power steering gears in the prior art. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] In response to the technical problem that the road feel performance of the steering gear needs to be tested, the present invention provides a steering gear performance testing system and a testing method thereof, which reflects the road feel performance of the steering gear through a comprehensive analysis of axial force data, pressure data of the first oil chamber, pressure data of the second oil chamber, and angle torque data, making the test more accurate.

[0005] 2. Technical solution

[0006] To solve the above problems, the technical solution provided by the present invention is: a steering gear performance testing system, comprising a vibrator, a tie rod assembly, a steering gear and a data processor, wherein: one end of the tie rod assembly is connected to the vibrator, and the other end of the tie rod assembly is connected to the output end of the steering gear, and the tie rod assembly is provided with a tension pressure sensor; the input end of the steering gear is provided with an inertia disk, and the inertia disk is provided with an angle torque sensor; the steering gear has a first oil chamber and a second oil chamber, the first oil chamber is provided with a first pressure sensor, and the second oil chamber is provided with a second pressure sensor; the tension pressure sensor, the angle torque sensor, the first pressure sensor, and the second pressure sensor are all connected to the data processor.

[0007] Optionally, the tie rod assembly includes a first tie rod and a second tie rod, one end of the first tie rod is connected to the vibrator, the other end of the first tie rod is hinged to the second tie rod, and the second tie rod is hinged to the output end of the steering gear.

[0008] Optionally, a limiting rod is provided between the first pull rod and the vibrator, the first pull rod passes through the limiting rod and is hinged to the second pull rod, and the first pull rod passes through the limiting rod and moves in the horizontal direction.

[0009] Optionally, the steering gear includes a housing, an input shaft, a rotary valve assembly and a rocker shaft, one end of the input shaft is connected to the rotary valve assembly, and the other end of the input shaft is used to connect to the steering wheel, the angle torque sensor is installed on the input shaft, one end of the rocker shaft is meshed with the rotary valve assembly, and the other end of the rocker shaft is hinged to the second tie rod, the rotary valve assembly is partially installed in the housing, and the rotary valve assembly installed in the housing divides the housing into the first oil chamber and the second oil chamber.

[0010] Optionally, the rotary valve assembly includes a valve sleeve, a steering screw and a steering nut, the steering screw and the steering nut are both arranged inside the shell, the valve sleeve cooperates with the steering screw, the steering nut is sleeved on the steering screw and the steering nut abuts against the shell, the steering nut divides the shell into the first oil chamber and the second oil chamber, one end of the input shaft is connected to the steering screw, and the other end of the input shaft is used to connect the steering wheel, one end of the rocker arm shaft is meshed with the steering nut, and the other end of the rocker arm shaft is connected to the second pull rod.

[0011] Optionally, the limiting rod is provided with a through hole for the first pull rod to pass through, and the connection between the vibrator and the first pull rod is on the same horizontal line as the through hole.

[0012] Optionally, the steering gear is connected to an oil supply system, which includes an oil tank and an oil pump. One end of the oil tank is connected to the rotary valve assembly, and the other end of the oil tank is connected to the oil pump, and the oil pump is connected to the rotary valve assembly.

[0013] Optionally, a spherical cavity is provided at one end of the first pull rod facing the second pull rod, a ball pin matching the spherical cavity is provided at one end of the second pull rod, a spherical cavity is provided at the other end of the second pull rod, and a ball pin is provided at the output end of the diverter.

[0014] Optionally, the data processor is connected to a data display.

[0015] The present invention also discloses a testing method of the steering gear performance testing system mentioned above, comprising the following steps:

[0016] (1) Start the vibrator, which outputs dual-frequency waves;

[0017] (2) a tension and pressure sensor disposed on the tie rod assembly collects the axial force of the tie rod assembly and transmits the axial force data to a data processor;

[0018] (3) a first pressure sensor disposed in the first oil chamber of the steering gear collects pressure data of the first oil chamber and transmits the pressure data of the first oil chamber to the data processor, and a second pressure sensor disposed in the second oil chamber of the steering gear collects pressure data of the second oil chamber and transmits the pressure data of the second oil chamber to the data processor;

[0019] (4) An angle torque sensor disposed on the inertia disk collects angle torque data of the steering gear input end and transmits the angle torque data to a data processor;

[0020] (5) The data processor analyzes the axial force data, the pressure data of the first oil chamber, the pressure data of the second oil chamber, and the angular torque data, and displays the analysis results in the form of a chart on a data display.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0023] (1) The steering gear performance test system proposed in the embodiment of the present application, the data processor reflects the performance of the steering gear by analyzing the axial force data, the pressure data of the first oil chamber, the pressure data of the second oil chamber, and the angle torque data, so as to guide the production and testing of the steering gear. Under the same axial force, the smaller the pressure data of the first oil chamber and the second oil chamber, the smaller the force that the reaction force from the tire finally acts on the steering wheel, and the smaller the angle and torque data. When the whole vehicle passes over a bumpy road, the steering wheel hitting phenomenon is not obvious, indicating that the steering gear performance is better, otherwise it indicates that the steering gear performance is poor. In addition, the smaller the difference between the pressure data of the first oil chamber and the pressure data of the second oil chamber, the better the steering gear performance. The oil pressure values ​​of the first oil chamber and the second oil chamber are consistent, and the vehicle will not deviate. The present invention reflects the road feel performance of the steering gear from a comprehensive analysis of the axial force data, the pressure data of the first oil chamber, the pressure data of the second oil chamber, and the angle torque data, so that the test is more accurate.

[0024] (2) In the steering gear performance test system proposed in the embodiment of the present application, the first tie rod is connected to the vibrator to output axial force to the steering gear, and the second tie rod is hinged to the first tie rod and the output end of the steering gear respectively to ensure that the second tie rod can be transmitted freely, thereby more realistically simulating the force condition at the output end of the steering gear when the wheel is vibrated. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of the structure of a steering gear performance testing system proposed in an embodiment of the present invention.

[0026] Figure 2 A structural diagram of a steering gear of a steering gear performance testing system proposed in an embodiment of the present invention.

[0027] Figure 3 A schematic diagram of a vibrator output waveform of a steering gear performance test system provided in an embodiment of the present invention.

[0028] Figure 4A schematic diagram of the oil pressure of the first oil chamber and the oil pressure of the second oil chamber of the steering gear performance testing system proposed in an embodiment of the present invention.

[0029] Figure 5 A schematic diagram of the angle torque at the input end of a steering gear of a steering gear performance testing system proposed in an embodiment of the present invention.

[0030] The marks in the accompanying drawings are: 1. vibrator; 2. tie rod assembly; 21. first tie rod; 22. second tie rod; 221. ball pin; 23. limit rod; 3. steering gear; 31. housing; 32. input shaft; 33. rocker shaft; 34. valve sleeve; 35. steering screw; 36. steering nut; 37. first oil chamber; 38. second oil chamber; 4. data processor; 5. inertia disk; 6. first pressure sensor; 7. second pressure sensor; 8. oil supply system; 81. oil tank; 82. oil pump; 9. data display. DETAILED DESCRIPTION

[0031] In order to further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.

[0032] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the relevant inventions, rather than to limit the invention. It should also be noted that, for the convenience of description, only the parts related to the invention are shown in the accompanying drawings. The words "first", "second", etc. described in the present invention are set for the convenience of describing the technical solution of the present invention, and have no specific limiting effect. They are all general references and do not constitute a limiting effect on the technical solution of the present invention. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. In the description of the present invention, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection between the insides of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Multiple technical solutions in the same embodiment, and multiple technical solutions in different embodiments, can be arranged and combined to form new technical solutions without contradictions or conflicts, all of which are within the scope of protection required by the present invention.

[0033] Example 1

[0034] Combined with Figure 1-5 The steering gear performance test system of this embodiment includes a vibrator 1, a tie rod assembly 2, a steering gear 3 and a data processor 4, wherein: one end of the tie rod assembly 2 is connected to the vibrator 1, and the other end of the tie rod assembly 2 is connected to the output end of the steering gear 3, and the tie rod assembly 2 is provided with a tension pressure sensor; the input end of the steering gear 3 is provided with an inertia disk 5, and the inertia disk 5 is provided with an angle torque sensor; the steering gear 3 has a first oil chamber 37 and a second oil chamber 38, the first oil chamber 37 is provided with a first pressure sensor 6, and the second oil chamber 38 is provided with a second pressure sensor 7; the tension pressure sensor, the angle torque sensor, the first pressure sensor 6, and the second pressure sensor 7 are all connected to the data processor 4. The vibrator 1 generates vibration to simulate road conditions. The vibrator of this embodiment has a dual-frequency wave output function, such as Figure 3As shown, the low-frequency wave is accompanied by a high-frequency wave, that is, it swings and vibrates at the same time. The frequencies and amplitudes of the two waveforms can be set as needed. The vibration is transmitted to the steering gear 3 by the pull rod. The tension pressure sensor on the pull rod assembly 2 transmits the collected axial force data to the data processor 4. The steering gear 3 generates pressure under the excitation of the vibrator 1. The first pressure sensor 6 set in the first oil chamber 37 and the second pressure sensor 7 set in the second oil chamber 38 respectively transmit the collected pressure data to the data processor 4. At the same time, the angular torque sensor at the input end of the steering gear 3 transmits the measured angular torque data to the data processor 4. The data processor 4 analyzes the axial force data, the pressure data of the first oil chamber 37, the pressure data of the second oil chamber 38 and the angular torque data To reflect the performance of the steering gear 3, so as to guide the production and test of the steering gear 3. The inertia disk 5 is used to simulate the steering wheel, which is equivalent to applying a load to the steering gear input shaft, and more effectively tests the performance of the steering gear. Under the same axial force, the smaller the pressure data of the first oil chamber 37 and the second oil chamber 38, the smaller the force of the reaction force from the tire that finally acts on the steering wheel, and the smaller the angle and torque data. When the whole vehicle passes over a bumpy road, the steering wheel hitting phenomenon is not obvious, indicating that the performance of the steering gear 3 is better, otherwise it means that the performance of the steering gear 3 is poor. In addition, the smaller the difference between the pressure data of the first oil chamber 37 and the pressure data of the second oil chamber 38, the better the performance of the steering gear 3. The oil pressure values ​​of the first oil chamber 37 and the second oil chamber 38 are consistent, and the vehicle will not be deviated. The present invention comprehensively analyzes the axial force data, the pressure data of the first oil chamber 37, the pressure data of the second oil chamber 38, and the angle torque data to reflect the road feel performance of the steering gear 3, and the test is more accurate.

[0035] Example 2

[0036] Combined with Figure 1-5 Compared with the technical solution of Example 1, the steering gear performance test system of this embodiment can be improved as follows: the tie rod assembly 2 includes a first tie rod 21 and a second tie rod 22, one end of the first tie rod 21 is connected to the vibrator 1, the other end of the first tie rod 21 is hinged to the second tie rod 22, and the second tie rod 22 is hinged to the output end of the steering gear 3. The first tie rod 21 is connected to the vibrator 1 to output axial force to the steering gear 3, and the second tie rod 22 is hinged to the first tie rod 21 and the output end of the steering gear 3 respectively, to ensure that the second tie rod 22 is freely transmitted, and more realistically simulate the force condition of the output end of the steering gear 3 when the wheel is vibrated.

[0037] Example 3

[0038] Combined with Figure 1-5Compared with the technical solution of embodiment 1 or 2, the steering gear performance test system of this embodiment can be improved as follows: a limit rod 23 is provided between the first tie rod 21 and the vibrator 1, the first tie rod 21 passes through the limit rod 23 and is hinged to the second tie rod 22, and the first tie rod 21 passes through the limit rod 23 and moves in the horizontal direction. The limit rod 23 limits the first tie rod 21, ensuring that the first tie rod 21 can move horizontally and axially smoothly under the action of the vibrator 1, and preventing the first tie rod 21 from radially deviating.

[0039] Example 4

[0040] Combined with Figure 1-5 Compared with any one of the technical solutions in Examples 1-3, the steering gear performance test system of this embodiment can be improved as follows: the steering gear 3 includes a housing 31, an input shaft 32, a rotary valve assembly and a rocker shaft 33, one end of the input shaft 32 is connected to the rotary valve assembly, and the other end of the input shaft 32 is used to connect the steering wheel, the angle torque sensor is installed on the input shaft 32, one end of the rocker shaft 33 is meshed with the rotary valve assembly, and the other end of the rocker shaft 33 is hinged to the second tie rod 22, the rotary valve assembly is partially installed in the housing 31, and the rotary valve assembly installed in the housing 31 divides the housing 31 into the first oil chamber 37 and the second oil chamber 38.

[0041] Example 5

[0042] Combined with Figure 1-5 Compared with any one of the technical solutions in Examples 1-4, the steering gear performance test system of this embodiment can be improved as follows: the rotary valve assembly includes a valve sleeve 34, a steering screw 35 and a steering nut 36, the steering screw 35 and the steering nut 36 are both arranged inside the housing 31, the valve sleeve 34 cooperates with the steering screw 35, the steering nut 36 is sleeved on the steering screw 35 and the steering nut 36 abuts against the housing 31, the steering nut 36 divides the housing 31 into the first oil chamber 37 and the second oil chamber 38, one end of the input shaft 32 is connected to the steering screw 35, and the other end of the input shaft 32 is used to connect the steering wheel, one end of the rocker arm shaft 33 is meshed with the steering nut 36, and the other end of the rocker arm shaft 33 is connected to the second tie rod 22. The valve sleeve 34 is provided with an oil inlet, through which oil is supplied to the first oil chamber 37 and the second oil chamber 38. The oil pressure difference between the first oil chamber 37 and the second oil chamber 38 is utilized to make the steering nut 36 move axially along the steering screw 35, so that the steering nut 36 drives the rocker shaft 33 to swing, thereby realizing wheel steering. The steering gear 3 performance test system of the present invention utilizes the vibrator 1 to simulate the situation where the wheel is subjected to ground vibration, and comprehensively analyzes the axial force data, the pressure data of the first oil chamber 37, the pressure data of the second oil chamber 38, and the angle torque data to reflect the performance of the steering gear 3, so that the test is more accurate.

[0043] Example 6

[0044] Combined with Figure 1-5 Compared with any one of the technical solutions in Examples 1-5, the steering gear performance test system of this embodiment can be improved as follows: the limit rod 23 is provided with a through hole for the first rod 21 to pass through, and the connection between the vibrator 1 and the first rod 21 is on the same horizontal line as the through hole. Ensure that the first rod 21 can move horizontally and axially smoothly under the action of the limit rod 23, and prevent the first rod 21 from radially deviating

[0045] Example 7

[0046] Combined with Figure 1-5 Compared with any one of the technical solutions in Examples 1-6, the steering gear performance test system of this embodiment can be improved as follows: the steering gear 3 is connected to an oil supply system 8, and the oil supply system 8 includes an oil tank 81 and an oil pump 82. One end of the oil tank 81 is connected to the valve sleeve 34 in the rotary valve assembly, and the other end of the oil tank 81 is connected to the oil pump 82, and the oil pump 82 is connected to the valve sleeve 34 in the rotary valve assembly. The hydraulic oil in the oil tank 81 is pumped into the valve sleeve 34 after being pressurized by the hydraulic pump, and is sent to the corresponding first oil chamber 37 or second oil chamber 38 through the valve sleeve 34 when the wheel turns left or right, providing steering power.

[0047] Example 8

[0048] Combined with Figure 1-5 Compared with any one of the technical solutions in Examples 1-7, the steering gear performance test system of this embodiment can be improved as follows: a spherical cavity is provided at one end of the first tie rod 21 facing the second tie rod 22, a ball pin 221 matching the spherical cavity is provided at one end of the second tie rod 22, a spherical cavity is provided at the other end of the second tie rod 22, and a ball pin 221 is provided at the output end of the steering gear 3, i.e., the rocker shaft 33. The cooperation between the ball pin 221 and the spherical cavity ensures that the second tie rod 22 can be transmitted freely, and more realistically simulates the situation that the output end of the steering gear 3 is subjected to force when the wheel is vibrated.

[0049] Example 9

[0050] Combined with Figure 1-5 , the steering gear performance test system of this embodiment, compared with any one of the technical solutions of embodiments 1-8, can be improved as follows: the data processor 4 is connected to a data display 9. The data processor 4 analyzes the axial force data, the pressure data of the first oil chamber 37, the pressure data of the second oil chamber 38, and the angle torque data, and displays the analysis results in the form of a chart on the data display 9, which is more intuitive.

[0051] Example 10

[0052] Combined with Figure 1-5A method for testing the steering gear performance test system according to any one of the above embodiments comprises the following steps:

[0053] (1) Start the vibrator 1, and the vibrator outputs a dual-frequency wave;

[0054] (2) The tension and pressure sensor disposed on the tie rod assembly 2 collects the axial force of the tie rod assembly 2 and transmits the axial force data to the data processor 4;

[0055] (3) The first pressure sensor 6 disposed in the first oil chamber 37 of the steering gear 3 collects pressure data of the first oil chamber 37 and transmits the pressure data of the first oil chamber 37 to the data processor 4, and the second pressure sensor 7 disposed in the second oil chamber 38 of the steering gear 3 collects pressure data of the second oil chamber 38 and transmits the pressure data of the second oil chamber 38 to the data processor 4;

[0056] (4) An angle torque sensor disposed on the inertia disk 5 collects angle torque data from the input end of the steering gear 3 and transmits the angle torque data to the data processor 4;

[0057] (5) The data processor 4 analyzes the axial force data, the pressure data of the first oil chamber 37 , the pressure data of the second oil chamber 38 , and the angular torque data, and displays the analysis results in the form of a chart on the data display 9 .

[0058] The vibrator has dual-frequency wave output function, such as Figure 3 As shown, the low-frequency wave is accompanied by a high-frequency wave, that is, it swings and vibrates at the same time, and the frequency and amplitude of the two waveforms can be set as needed. The data processor 4 reflects the performance of the steering gear 3 by analyzing the axial force data, the pressure data of the first oil chamber 37, the pressure data of the second oil chamber 38, and the angle torque data, so as to guide the production and testing of the steering gear 3. Under the same axial force, the smaller the pressure data of the first oil chamber 37 and the second oil chamber 38, the smaller the force of the reaction force from the tire that finally acts on the steering wheel, and the smaller the angle and torque data. When the whole vehicle passes over a bumpy road, the steering wheel hitting phenomenon is not obvious, indicating that the performance of the steering gear 3 is better, otherwise it means that the performance of the steering gear 3 is poor. In addition, the smaller the difference between the pressure data of the first oil chamber 37 and the pressure data of the second oil chamber 38, the better the performance of the steering gear 3. The oil pressure values ​​of the first oil chamber 37 and the second oil chamber 38 are consistent, and the vehicle will not deviate. The present invention comprehensively analyzes the axial force data, the pressure data of the first oil chamber 37, the pressure data of the second oil chamber 38, and the angle torque data to reflect the road feel performance of the steering gear 3, and the test is more accurate. The data processor 4 analyzes the axial force data, the pressure data of the first oil chamber 37, the pressure data of the second oil chamber 38, and the angle torque data, and displays the analysis results in the form of charts on the data display 9, which is more intuitive.

[0059] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A steering gear performance test system, characterized in that: It includes a vibrator, a tie rod assembly, a steering gear and a data processor, wherein: One end of the pull rod assembly is connected to the vibrator, and the other end of the pull rod assembly is connected to the output end of the steering gear. A tension pressure sensor is provided on the pull rod assembly; An inertia disk is provided at the input end of the steering gear, and an angle torque sensor is provided on the inertia disk; The steering gear comprises a first oil chamber and a second oil chamber, the first oil chamber is provided with a first pressure sensor, and the second oil chamber is provided with a second pressure sensor; The tension and pressure sensor, the angle torque sensor, the first pressure sensor, and the second pressure sensor are all connected to the data processor; The tie rod assembly comprises a first tie rod and a second tie rod, one end of the first tie rod is connected to the vibrator, the other end of the first tie rod is hinged to the second tie rod, and the second tie rod is hinged to the output end of the steering gear; The steering gear comprises a housing, an input shaft, a rotary valve assembly and a rocker shaft, one end of the input shaft is connected to the rotary valve assembly, and the other end of the input shaft is used to connect the steering wheel, the angle torque sensor is installed on the input shaft, one end of the rocker shaft is meshed with the rotary valve assembly, and the other end of the rocker shaft is hinged to the second tie rod, the rotary valve assembly is partially installed in the housing, and the rotary valve assembly installed in the housing divides the housing into the first oil chamber and the second oil chamber; The rotary valve assembly includes a valve sleeve, a steering screw and a steering nut. The steering screw and the steering nut are both arranged inside the shell. The valve sleeve cooperates with the steering screw. The steering nut is sleeved on the steering screw and the steering nut abuts against the shell. The steering nut divides the shell into the first oil chamber and the second oil chamber. One end of the input shaft is connected to the steering screw, and the other end of the input shaft is used to connect the steering wheel. One end of the rocker arm shaft is meshed with the steering nut, and the other end of the rocker arm shaft is connected to the second pull rod.

2. The steering gear performance test system according to claim 1, characterized in that: A limiting rod is arranged between the first pull rod and the vibrator, the first pull rod passes through the limiting rod and is hinged to the second pull rod, and the first pull rod passes through the limiting rod and moves in the horizontal direction.

3. The steering gear performance testing system according to claim 2, characterized in that: The limiting rod is provided with a through hole for the first pull rod to pass through, and the connection between the vibrator and the first pull rod is on the same horizontal line as the through hole.

4. The steering gear performance testing system according to claim 1, characterized in that: The steering gear is connected to an oil supply system, which includes an oil tank and an oil pump. One end of the oil tank is connected to the rotary valve assembly, and the other end of the oil tank is connected to the oil pump, and the oil pump is connected to the rotary valve assembly.

5. The steering gear performance testing system according to claim 1, characterized in that: A spherical cavity is provided at one end of the first pull rod facing the second pull rod, a ball pin matching the spherical cavity is provided at one end of the second pull rod, a spherical cavity is provided at the other end of the second pull rod, and a ball pin is provided at the output end of the steering gear.

6. The steering gear performance testing system according to claim 1, characterized in that: The data processor is connected to a data display.

7. A testing method for the steering gear performance testing system according to claim 6, characterized in that: The steps include: (1) Start the vibrator, which outputs dual-frequency waves; (2) A tension and pressure sensor disposed on the tie rod assembly collects the axial force of the tie rod assembly and transmits the axial force data to a data processor; (3) a first pressure sensor disposed in the first oil chamber of the steering gear collects pressure data of the first oil chamber and transmits the pressure data of the first oil chamber to the data processor, and a second pressure sensor disposed in the second oil chamber of the steering gear collects pressure data of the second oil chamber and transmits the pressure data of the second oil chamber to the data processor; (4) An angle torque sensor disposed on the inertia disk collects angle torque data at the input end of the steering gear and transmits the angle torque data to a data processor; (5) The data processor analyzes the axial force data, the pressure data of the first oil chamber, the pressure data of the second oil chamber, and the angular torque data, and displays the analysis results in the form of a chart on a data display.

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