Steering shaft sliding force testing method and testing equipment

Abstract

The present invention relates to the technical field of vehicle component detection, and in particular, to a steering shaft slip force test method and test equipment. The steering shaft slip force test method comprises: the steering shaft to be detected comprises a first shaft segment and a second shaft segment which are connected to each other and coaxially arranged, and the second shaft segment can slide in an axial direction relative to the first shaft segment; after fixing the first shaft segment, applying a set torque to the steering shaft to be detected, driving the second shaft segment to move in an axial direction relative to the first shaft segment; and detecting the slip force value and the curve of the change with the moving distance during the movement of the second shaft segment. In this way, the problem of detecting the operating parameters of the vehicle steering shaft in a simulated real situation is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle component detection, and in particular to a steering shaft slip force testing method and testing equipment. Background Art

[0002] In the field of automobile steering gear manufacturing; after the automobile steering gear is manufactured, it is necessary to test the axial sliding force, angular sliding force, center height of assembly, assembly hole position of the bracket and handle assembly position of the workpiece; currently, the above-mentioned inspection items of the workpiece are all carried out and completed separately.

[0003] However, in actual vehicle driving, especially for engineering vehicles, they often have to face poor road conditions. During the driving process, the steering wheel of the vehicle will move up and down with the changes in the road surface, which will stretch the axle fork and cause the steering shaft to move up and down. If steering is required at this time, the driver will turn the steering wheel, and then the torque relative to the central axis will be applied on the basis of the up and down movement of the steering shaft. The test of this situation is more in line with the actual operation of the driver. However, the existing detection schemes do not perform the above-mentioned tests, and each unidirectional test cannot reflect the numerical relationship between multiple parameters in actual situations, which lacks reference value for actual driving conditions and scheme design. Summary of the invention

[0004] In order to solve the problem of detecting the operating parameters of a vehicle steering shaft under simulated real conditions, the present invention provides a steering shaft sliding force testing method and a testing device.

[0005] The first aspect of the present invention discloses a steering shaft slip force testing method, comprising: the steering shaft to be tested comprises a first shaft segment and a second shaft segment which are connected to each other and coaxially arranged, and the second shaft segment can slide in an axial direction relative to the first shaft segment; the steering shaft slip force testing method comprises: after fixing the first shaft segment, applying a set torque to the steering shaft to be tested, driving the second shaft segment to move in an axial direction relative to the first shaft segment; and detecting the slip force value and the curve of the change with the moving distance during the movement of the second shaft segment.

[0006] In some embodiments, the second shaft segment includes a second shaft end distal from the first shaft segment, and the torque is applied to the second shaft end.

[0007] In some embodiments, the second shaft segment is driven at a first set speed to move at a constant speed relative to the first shaft segment.

[0008] In some embodiments, in the process of driving the second shaft segment to move relative to the first shaft segment, the second shaft segment is first driven close to the first shaft segment, and then driven away from the first shaft segment.

[0009] In some embodiments, the first shaft segment includes a first shaft end for fixing. After the first shaft segment is fixed, the height of the first shaft end is lower than the height of the second shaft end and has a set angle with the horizontal direction.

[0010] In some embodiments, the set angle is 40°-50°.

[0011] The second aspect of the present application also provides a steering shaft slip force testing device, which is used for the steering shaft slip force testing method in the technical solution, including: a support plate, a shaft end fixing device, a torque device, a sliding device and a testing device; the shaft end fixing device, the torque device, the sliding device and the testing device are all arranged on the support plate; the shaft end fixing device is used to connect with the first shaft segment and limit the movement of the first shaft segment; the torque device is connected to either the first shaft segment or the second shaft segment, and can drive the first shaft segment and the second shaft segment to undergo relative twisting according to a set torque; the sliding device includes a first driver, the first driver includes a fixed end and a first moving end, the first moving end is connected to the second shaft segment and is used to drive the second shaft segment to move in an axial direction; the testing device includes a distance sensor and a slip force sensor, the distance sensor is used to measure the moving distance of the second shaft segment, the slip force sensor is connected to the driver, and the slip force sensor is used to measure the value of the slip force used when the driver drives the second shaft segment to move.

[0012] In some embodiments, the testing device further includes a torque sensor, which is connected to the torque device and is used to measure the torque value applied by the torque device.

[0013] In some embodiments, the sliding device also includes a first connecting member, which is fixedly connected to the shaft end of the second shaft segment; the torque device includes a torsion arm and a force-applying assembly, the torsion arm is fixedly connected to the first connecting member, the torsion arm includes a torsion end away from the first connecting member, the force-applying assembly is connected to the torsion end, and can drive the torsion end to rotate around the axis of the steering shaft to be detected.

[0014] In some embodiments, the force-applying assembly includes a clamping clamp and a second driver, the clamping clamp is hinged to the torsion end, the second driver is connected to the clamping clamp, and the second driver can drive the clamping clamp to move in a vertical direction.

[0015] In some embodiments, the torque device also includes a first slide and a first slider matching the first slide, the first slide has the same axial direction as the steering shaft to be detected, the clamping clamp and the second driver are both arranged on the first slider, and when the second shaft segment moves, the second shaft segment drives the first slider to slide along the extension direction of the first slide through the torsion arm.

[0016] In some embodiments, the sliding device further includes a second slideway and a second slider matching the second slideway, and the moving end is connected to the second shaft segment via the second slider.

[0017] In some embodiments, the steering shaft sliding force testing equipment also includes a tilt adjustment device, which includes a third slide, a third slider and a height adjustment assembly. The bottom of the first end of the support plate is connected to the third slider. The extension direction of the third slide is consistent with the extension direction of the steering shaft to be tested. The height adjustment assembly includes a third driver. The third driver includes a second movable end. The second movable end is connected to the second end of the support plate and can drive the second end of the support plate to move in a vertical direction.

[0018] In order to solve the problem of detecting the operating parameters of the vehicle steering shaft under simulated real conditions, the present invention has the following advantages:

[0019] In the above technical solution, one end of the steering shaft is first fixed and then a set torque is applied thereto, thereby simulating the driver's operation of the steering wheel. At the same time, the second shaft section is driven to move in the axial direction relative to the first shaft section, thereby simulating the situation when driving on a bumpy road section, in which the steering wheel moves up and down and drives the steering shaft to move. In the process of driving the second shaft section to move, the change in the driving force that drives the second shaft section to move and the moving distance are detected, thereby obtaining the value of the slip force under the set torque and a curve of its change with the moving distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic structural diagram of a steering shaft sliding force testing device according to an embodiment is shown;

[0021] Figure 2 A schematic diagram of the side structure of a steering shaft sliding force testing device according to an embodiment is shown;

[0022] Figure 3 Shows Figure 1 The partial enlarged structure diagram of the middle A part;

[0023] Figure 4 Shows Figure 1 A partial enlarged structural diagram of the middle B part;

[0024] Figure 5 A schematic diagram of the rear oblique view of a steering shaft sliding force testing device according to an embodiment is shown;

[0025] Figure 6 Shows Figure 5 A partial enlarged structural diagram of part C in the middle.

[0026] Figure markings: 10-steering shaft to be tested; 11-first shaft section; 12-second shaft section; 20-support plate; 30-shaft end fixing device; 31-fixing member; 32-second connecting member; 40-torque device; 421-clamping pliers; 422-second driver; 431-first slideway; 432-first slider; 50-sliding device; 51-first driver; 511-fixed end; 512-first movable end; 62-first connecting member; 531-second slideway; 532-second slider; 61-six-axis sensor; 70-tilt adjustment device; 71-third slideway; 72-third slider; 731-third driver; 7311-second movable end; 7312-screw; 74-light rod. DETAILED DESCRIPTION

[0027] The present disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0028] As used herein, the term "including" and its variants are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "one embodiment" and "an embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal" and the like is based on the orientation or position relationship shown in the accompanying drawings. These terms are mainly for better describing the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to being used to indicate an orientation or position relationship, some of the above terms may also be used to indicate other meanings, such as the term "upper" may also be used to indicate a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances. In addition, the terms "install", "set", "provided with", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0029] The first aspect of the present invention discloses a steering shaft sliding force testing method, referring to Figure 1 As shown, the steering shaft 10 to be tested includes a first shaft segment 11 and a second shaft segment 12 which are connected to each other and coaxially arranged, and the second shaft segment 12 can slide in the axial direction relative to the first shaft segment 11; the steering shaft sliding force testing method includes: after fixing the first shaft segment 11, after applying a set torque to the steering shaft 10 to be tested, driving the second shaft segment 12 to move in the axial direction relative to the first shaft segment 11; and detecting the value of the sliding force and the curve of the change with the moving distance during the movement of the second shaft segment 12.

[0030] In the above technical solution, one end of the steering shaft is first fixed and then a set torque is applied thereto, thereby simulating the driver's operation of the steering wheel. At the same time, the second shaft section 12 is driven to move in the axial direction relative to the first shaft section 11, thereby simulating the situation when driving on a bumpy road section, in which the steering wheel moves up and down and drives the steering shaft to move. In the process of driving the second shaft section 12 to move, the change in the driving force driving the second shaft section 12 to move and the moving distance are detected, thereby obtaining the value of the slip force under the set torque and a curve of its change with the moving distance.

[0031] Among them, fixing the first shaft section 11 refers to fixing its position to prevent it from being displaced when it is subjected to an external force that is not actively applied to it. If it is not fixed, when the second shaft section 12 is driven to move, the second shaft section 12 will drive the first shaft section 11 to be displaced, and then the detection of the sliding force will be ineffective. Specifically, the fixing method can be implemented in a variety of ways. For example, the end of the second shaft section 12 is connected to a structure that can match it to fix it. The first shaft section 11 can also be directly fixed to a fixed bracket, support plate 20, etc. by a single-point or multi-point connection method. Preferably, while ensuring the effectiveness of the fixation and connection, a detachable connection method can be used to facilitate the disassembly of the steering shaft 10 to be detected. For example, screw connection, pin connection, etc. can be used. If rotation is required, hinge connection, etc. can also be used.

[0032] There are many ways to apply the set torque to the steering shaft 10 to be tested. For example, the first shaft section 11 or the second shaft section 12 can be driven to rotate around the central axis. When the first shaft section 11 is fixed, its position relative to the second shaft section 12 can be kept unchanged and the whole shaft section 11 can be driven to rotate, thereby applying the set torque. If the second shaft section 12 is driven, since the second shaft section 12 is not fixed, a more flexible driving method can be adopted. For example, the second shaft section 12 can be driven away from the end of the first shaft section 11 to rotate it, or a force can be applied to any position of the second shaft section 12, as long as it can be driven to rotate and reach the set torque.

[0033] For the detection and recording of the change in the distance when the second shaft section 12 moves relative to the first shaft section 11, a reference mark such as a ruler capable of measuring the distance can be set at a position aligned with the moving direction of the second shaft section 12. When the second shaft section 12 moves, the current value of the slip force can be detected and recorded according to the moving distance it reaches, thereby obtaining the value of the slip force and the curve of the change with the moving distance; for the convenience of measurement, a sensor connected to a processing device can also be used as an implementation method. The processing device can be a computer or other equipment, and the sensor can be controlled to collect data according to a set frequency, etc. The detection of the slip force can be detected and obtained by detecting the driving force that drives the second shaft section 12 to move. Physical property detection equipment such as a dynamometer can be used, and equipment such as an electrical sensor can also be used.

[0034] In order to more accurately simulate the operation and feeling of the driver, the second shaft section 12 includes a second shaft end away from the first shaft section 11, and the torque is applied to the second shaft end.

[0035] In actual situations, the second shaft end of the second shaft section 12 is used to connect to the steering wheel, that is, the operating position where the driver actually applies the rotational torque. Therefore, applying a torsional force here can more accurately simulate the actual force condition of the steering shaft.

[0036] As an implementation mode, the second shaft section 12 is driven at a first set speed to move at a constant speed relative to the first shaft section 11. In this embodiment, since the driver feels the change of the sliding force during actual operation, the movement process is actually a passive effect caused by the bumpy road surface, not the force actively applied by the driver. Therefore, in order to simulate the actual feeling of the driver, the second shaft section 12 is driven at a constant speed to detect the change of the sliding force under different moving distances, so as to understand the value of the sliding force felt by the driver under different bumpy conditions.

[0037] As another implementation, in the process of driving the second shaft section 12 to move relative to the first shaft section 11, the second shaft section 12 is first driven close to the first shaft section 11, and then the second shaft section 12 is driven away from the first shaft section 11. In this embodiment, in order to make the test result more accurate, the steering shaft to be tested should be set to a relatively consistent state before the test, so the initial state of the steering shaft to be tested can be set to a stretched state, and it is first pushed to be compressed and then pushed to be stretched to complete the test.

[0038] The steering shaft is not actually in a horizontal state when installed on the vehicle, that is, it is tilted upward in the process of extending from the first shaft end to the second shaft end. Therefore, the first shaft section 11 includes a first shaft end for fixing. After the first shaft section 11 is fixed, the height of the first shaft end is lower than the height of the second shaft end and has a set angle with the horizontal direction.

[0039] The specific setting angle can be adjusted accordingly according to the experimental requirements and vehicle model changes. The steering wheel position of the vehicles currently in actual use is usually adjustable to accommodate drivers of different body shapes, which results in the steering axis and the horizontal direction angle not being a fixed value. Therefore, corresponding settings can be made according to the test objectives to simulate the real situation.

[0040] As a specific implementation, the angle is set to 40°-50°.

[0041] The second aspect of the present invention also provides a steering shaft sliding force testing device, such as Figure 1-Figure 4 As shown,

[0042] The steering shaft sliding force testing method used in the above technical solution includes: a support plate 20, a shaft end fixing device 30, a torque device 40, a sliding device 50 and a testing device; the shaft end fixing device 30, the torque device 40, the sliding device 50 and the testing device are all arranged on the support plate 20; the shaft end fixing device 30 is used to connect with the first shaft segment 11 and limit the movement of the first shaft segment 11; the torque device 40 is connected to either the first shaft segment 11 or the second shaft segment 12, and can drive the first shaft segment 11 to move with the second shaft segment 12 according to the set torque. The second shaft segment 12 undergoes relative twisting; the sliding device 50 includes a first driver 51, the first driver 51 includes a fixed end 511 and a first movable end 512, the first movable end 512 is connected to the second shaft segment 12 and is used to drive the second shaft segment 12 to move in the axial direction; the testing device includes a distance sensor and a sliding force sensor, the distance sensor is used to measure the moving distance of the second shaft segment 12, the sliding force sensor is connected to the driver, and the sliding force sensor is used to measure the value of the sliding force used when the driver drives the second shaft segment 12 to move.

[0043] Among them, the support plate 20 is used to provide support for other components and connect them as a whole. It can be a simple plate-like structure. In some embodiments, a structure that plays a similar role, such as a fixed frame, can also be used. The shaft end fixing device 30 may include a fixing member 31 for connecting to the support plate 20 and a second connecting member 32 for connecting to the first shaft end of the first shaft segment 11. Specifically, the first shaft end is usually used to connect to the transmission system of the vehicle, so a structure for connection has been set. The second connecting member 32 can match the connecting structure set on the first shaft end, and is connected by pin connection, screw connection, hinge connection, etc., and is convenient for disassembly and assembly. As another embodiment, the shaft end fixing device 30 may also include a limit groove that matches the shape of the first shaft segment 11, and the movement of the first shaft segment 11 is limited by the limit groove. By connecting any one of the first shaft section 11 and the second shaft section 12, it can be driven to rotate, and the first shaft section 11 and the second shaft section 12 can be driven to rotate relative to each other according to the set torque. Specifically, the first shaft section 11 and the second shaft section 12 can also be driven to rotate in opposite directions at the same time, which can also achieve the same effect. However, driving them separately will make the equipment complicated, resulting in increased cost and troublesome installation. Therefore, it is preferred to choose to drive any one of the first shaft section 11 and the second shaft section 12. Specifically, the driving method can directly drive them to rotate, or the force can be converted to the steering shaft by means of a structure such as a rotating arm connected to the first shaft section 11 or the second shaft section 12. The sliding device 50 is used to drive the second shaft section 12 to move along the central axis relative to the first shaft section 11. The value of the sliding force and its curve of change with the moving distance can be detected by detecting the driving force of the second shaft section 12. The testing device includes a distance sensor and a sliding force sensor. The distance sensor can be a simple pull-rope type sensor or an optical sensor such as infrared, laser, etc. The sliding force sensor is used to detect the magnitude of the driving force of the second shaft segment 12. Since the force is mutual, the sliding force is actually the resistance that needs to be overcome when driving the second shaft segment 12 to move relative to the first shaft segment 11. Therefore, the sliding force can be detected by detecting the magnitude of the driving force.

[0044] In order to intuitively obtain the magnitude of the applied torque, the testing device further includes a torque sensor, which is connected to the torque device 40 and is used to measure the torque value applied by the torque device 40 .

[0045] Specifically, Figure 4 As shown, a six-axis sensor 61 is used, and the six-axis sensor 61 is arranged at the position where the first drive component is connected to the steering shaft. The sensor can simultaneously measure the torque and the force pulling the second shaft section 12 to move, that is, it includes a sliding force sensor and a torque sensor at the same time, thereby simplifying the structural setting of the sensor.

[0046] As a specific implementation method, Figure 4 As shown, the sliding device 50 also includes a first connecting member 62, which is fixedly connected to the axial end of the second shaft segment 12; the torque device 40 includes a torsion arm and a force-applying assembly, the torsion arm is fixedly connected to the first connecting member 62, the torsion arm includes a torsion end away from the first connecting member 62, the force-applying assembly is connected to the torsion end, and can drive the torsion end to rotate around the axis of the steering shaft 10 to be detected.

[0047] By using the setting of the torsion arm, the linear motion is converted into arc rotation by driving the torsion end of the torsion arm to move, thereby applying a torsion force to the second shaft segment 12. In addition, since the length of the torsion arm is known, the magnitude of the applied torque can be easily calculated. The torsion arm can be driven by human power or mechanical power, for example, a screw rod and a fixed nut can be used to drive it. When the screw rod is rotated, the screw rod can drive the torsion arm to rotate, so as to achieve the purpose of applying torque.

[0048] In order to simplify the experimental operation and improve the experimental efficiency, Figure 4 As shown, the force-applying assembly includes a clamp 421 and a second driver 422. The clamp 421 is hinged to the torsion end, and the second driver 422 is connected to the clamp 421. The second driver 422 can drive the clamp 421 to move in the vertical direction. The second driver 422 can be a motor, a pneumatic cylinder, a hydraulic cylinder, etc. The clamp 421 can be clamped on the outer surface of the torsion arm. Alternatively, the clamp 421 can also be a simple sheet structure, which contacts the force point of the torsion arm and directly drives the torsion arm to rotate in the opposite direction.

[0049] Since the torque loading state needs to be maintained during the experiment, when the torque device 40 is connected to the second shaft segment 12, it is required that the torque device 40 can move along with the second shaft segment 12. Figure 4 As shown, the torque device 40 also includes a first slide 431 and a first slider 432 matching the first slide 431. The first slide 431 has the same axial direction as the steering shaft 10 to be detected. The clamping clamp 421 and the second driver are both arranged on the first slider 432. When the second shaft segment 12 moves, the second shaft segment 12 drives the first slider 432 to slide along the extension direction of the first slide 431 through the torsion arm.

[0050] The provision of the first slideway 431 and the first slider 432 not only enables the torque device 40 to move with the second shaft segment 12, but also enables it to remain stable during the movement, thereby preventing the torque applied thereto from fluctuating due to the movement and affecting the test.

[0051] At the same time, in the present invention, since it is necessary to drive the second shaft section 12 to move in a straight line while applying torque to the steering shaft, the additional torque applied to the driving component driving the second shaft section 12 will affect its working performance and even shorten its service life. To solve this problem, Figure 1 , Figure 4 As shown, the sliding device 50 also includes a second slideway 531 and a second slider 532 matching the second slideway 531 , and the moving end is connected to the second shaft section 12 via the second slider 532 .

[0052] The matching effect of the second slideway 531 and the second slider 532 can share the force on the drive assembly when the second shaft segment 12 is twisted. It can be understood that the position where the second shaft segment 12 is connected to the second slider 532 can rotate around the central axis, thereby preventing the force from being transmitted to the moving end when the torque is applied to the second shaft segment 12.

[0053] In addition, in order to adjust the extension direction of the steering axis during the experiment, so as to more accurately simulate the driver's operating experience in actual situations, such as Figure 3 , Figure 5 , Figure 6 As shown, the steering shaft sliding force detection equipment also includes a tilt adjustment device 70, the tilt adjustment device 70 includes a third slide 71, a third slider 72 and a height adjustment assembly, the bottom of the first end of the support plate 20 is connected to the third slider 72, the extension direction of the third slide 71 is consistent with the extension direction of the steering shaft 10 to be detected, the height adjustment assembly includes a third driver 731, the third driver 731 includes a second movable end 7311, the second movable end 7311 is connected to the second end of the support plate 20, and can drive the second end of the support plate 20 to move in the vertical direction.

[0054] The third driver 731 can be a telescopic rod, a motor, etc., and in order to maintain stability during the experiment, Figure 5-6 As shown, the third driver 731 adopts a screw drive method, which enables the screw nut on the screw 7312, that is, the second movable end 7311, to stably stay at any position on the screw 7312, and because the experimental equipment has a certain weight, the screw drive device has a good load-bearing capacity. In addition, the height adjustment component can also include a light rod 74 in the figure, which plays a guiding role. Since the first end of the steering shaft will be driven to move during the process of adjusting the height of the second end of the steering shaft, the third slide 71 and the third slider 72 are set to enable the support plate 20 to move along a predetermined trajectory without deviation.

[0055] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present disclosure, and in actual applications, various changes may be made thereto in form and detail without departing from the scope of the present disclosure.

Claims

1. A steering shaft sliding force testing method, characterized in that: The steering shaft to be tested comprises a first shaft segment and a second shaft segment which are connected to each other and arranged coaxially, and the second shaft segment can slide in the axial direction relative to the first shaft segment; The steering shaft sliding force testing method comprises: After fixing the first shaft segment, applying a set torque to the steering shaft to be tested, and driving the second shaft segment to move in an axial direction relative to the first shaft segment; and detecting the value of the sliding force and the curve of the sliding force changing with the moving distance during the movement of the second shaft segment; The second shaft segment includes a second shaft end distal to the first shaft segment, and the torque is applied to the second shaft end; The first shaft section includes a first shaft end portion for fixing. After the first shaft section is fixed, the height of the first shaft end portion is lower than the height of the second shaft end portion and has a set angle with the horizontal direction.

2. A steering shaft sliding force testing method according to claim 1, characterized in that: The second shaft section is driven to move relative to the first shaft section at a constant speed at a first set speed.

3. A steering shaft sliding force testing method according to claim 2, characterized in that: In the process of driving the second shaft segment to move relative to the first shaft segment, the second shaft segment is first driven to approach the first shaft segment, and then driven to move away from the first shaft segment.

4. A steering shaft sliding force testing method according to claim 1, characterized in that: The setting angle is 40°-50°.

5. A steering shaft sliding force testing device, characterized in that: The steering shaft sliding force testing method used in any one of claims 1 to 4 above comprises: a support plate, a shaft end fixing device, a torque device, a sliding device and a testing device; The shaft end fixing device, the torque device, the sliding device and the testing device are all arranged on the supporting plate; The shaft end fixing device is used to connect with the first shaft segment and limit the movement of the first shaft segment; The torque device is connected to any one of the first shaft segment or the second shaft segment, and can drive the first shaft segment and the second shaft segment to rotate relative to each other according to a set torque; The sliding device comprises a first driver, the first driver comprises a fixed end and a first movable end, the first movable end is connected to the second shaft segment and is used to drive the second shaft segment to move in an axial direction; The testing device includes a distance sensor and a sliding force sensor. The distance sensor is used to measure the moving distance of the second shaft segment. The sliding force sensor is connected to the driver and is used to measure the value of the sliding force used by the driver to drive the second shaft segment to move.

6. The steering shaft sliding force testing device according to claim 5, characterized in that: The testing device further comprises a torque sensor, which is connected to the torque device and is used to measure the torque value applied by the torque device.

7. The steering shaft sliding force testing device according to claim 5, characterized in that: The sliding device further comprises a first connecting member, wherein the first connecting member is fixedly connected to the shaft end of the second shaft segment; The torque device includes a torsion arm and a force-applying assembly, wherein the torsion arm is fixedly connected to the first connecting member, the torsion arm includes a torsion end away from the first connecting member, the force-applying assembly is connected to the torsion end and can drive the torsion end to rotate around the axis of the steering shaft to be detected.

8. The steering shaft sliding force testing device according to claim 7, characterized in that: The force-applying assembly includes a clamp and a second driver, wherein the clamp is hinged to the torsion end, and the second driver is connected to the clamp, and the second driver can drive the clamp to move in a vertical direction.

9. The steering shaft sliding force testing device according to claim 8, characterized in that: The torque device also includes a first slide and a first slider matching the first slide, the first slide has the same axial direction as the steering shaft to be detected, the clamping clamp and the second driver are both arranged on the first slider, and when the second shaft segment moves, the second shaft segment drives the first slider to slide along the extension direction of the first slide through the torsion arm.

10. The steering shaft sliding force testing device according to claim 5, characterized in that: The sliding device also includes a second slideway and a second slider matched with the second slideway, and the moving end is connected to the second shaft section via the second slider.

11. The steering shaft sliding force testing device according to claim 5, characterized in that: It also includes a tilt adjustment device, which includes a third slide, a third slider and a height adjustment assembly, the bottom of the first end of the support plate is connected to the third slider, and the extension direction of the third slide is consistent with the extension direction of the steering shaft to be detected; The height adjustment assembly includes a third driver, and the third driver includes a second moving end, and the second moving end is connected to the second end of the support plate and can drive the second end of the support plate to move in a vertical direction.

Images