A test method for a multifunction test bench for a steering wheel system

Abstract

The application discloses a test method of a multifunctional test table for a rudder wheel system, wherein the comprehensive test table is integrally composed of a loading unit, a friction test unit, a comprehensive performance test unit and an outer frame. The loading unit comprises a lifting motor, a worm gear screw lifter, a first tensile and compressive force sensor, a suspension system, a T-shaped sliding block and an adapter plate; the friction test unit comprises a gear reduction motor, a first coupling, a ball screw, a second tensile and compressive force sensor, a heavy-load linear guide rail, a protective cover, a heavy-load sliding block, a material block, a first limiter, a deep groove ball bearing and a bearing seat; the comprehensive performance test unit comprises a magnetic powder brake, a torque sensor, a metal-to-metal grinding wheel, a second coupling, a third coupling and a transmission shaft; and the outer frame comprises a bottom support frame, an upper side moving frame, a linear guide rail, a sliding block, a screw rod, a hand wheel and a second limiter.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of test devices, it is a kind of multifunctional test platform for rudder wheel system. BACKGROUND

[0002] With the improvement of modern industrial intelligent degree, AGV rudder wheel system has stepped onto the stage of era.But there is no special test platform for the performance of rudder wheel system on the market at present, the similar loading test platform cannot test the actual friction coefficient of rudder wheel, and cannot carry out research test such as obstacle crossing and ditch crossing, and has certain limitation, the multifunctional test platform integrates multiple functions that can bottom up the performance of rudder wheel, and increases suspension system, improves loading stability. SUMMARY

[0003] The utility model aims at providing a kind of multifunctional test platform for rudder wheel system, the test platform can carry out rudder wheel tire rolling friction coefficient test, rudder wheel tire sliding friction coefficient test, rudder wheel system obstacle crossing test, rudder wheel system ditch crossing test etc. on the basis of realizing the function of rudder wheel system routine loading test.

[0004] The technical solution for realizing the purpose of the utility model: a kind of multifunctional test platform for rudder wheel system, by loading unit, friction test unit, comprehensive performance test unit and outer frame are formed.Loaded unit includes lifting motor, worm screw lifter, first tension and compression force sensor, suspension system, T-shaped slider, adapter plate;Friction test unit includes gear reduction motor, first coupling, ball screw, second tension and compression force sensor, heavy load linear guide, protective cover, heavy load slider, material block, first limiter, deep groove ball bearing, bearing seat;Comprehensive performance test unit includes magnetic powder brake, torque sensor, metal pair of grinding wheels, second coupling, third coupling, transmission shaft;Outer frame includes bottom support frame, upper side moving frame, linear guide, slider, screw rod, hand wheel, second limiter.

[0005] In loaded unit, lifting motor cooperates worm screw lifter to exert loading force to simulate wheel pressure, and bottom is connected to suspension system, so that loading is more stable, and bottom can be connected to the rudder wheel system to be measured.

[0006] In friction test unit, gear reduction motor cooperates ball screw and linear guide to provide horizontal tension, and heavy load slider is pushed to move relative to rudder wheel tire.

[0007] In comprehensive performance test unit, magnetic powder brake provides load torque, and metal pair of grinding wheels are connected by transmission shaft, and rudder wheel can provide load when driving metal pair of grinding wheels to rotate.

[0008] The loading unit is integrally installed in the upper moving frame, and the rotating hand wheel can move on the friction test unit and the comprehensive performance test unit as a whole through the linear guide rail and the ball screw, so that the integration of various test functions is realized.

[0009] Compared with the prior art, the present application has the following advantages: (1) more test functions can be realized, including friction coefficient measurement, obstacle and ditch crossing test, and service life test; (2) the functions are compatible and highly integrated, the loading unit is integrally installed, and the integral movement can meet the needs of different test functions; (3) the loading stability is good, the tensile and compressive force sensors can feed back the loading force in real time, the loading force change is controlled, and the suspension system is provided, so that the loading is more stable; and (4) the rudder wheel is more convenient to install, the rudder wheel adapter plate is connected with a T-shaped block, and the T-shaped block can be directly slid into the T-shaped slot in the suspension bottom plate during installation. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a front view of the multifunctional test bench;

[0011] Figure 2 is a left view of the multifunctional test bench;

[0012] Figure 3 is a right view of the multifunctional test bench;

[0013] Figure 4 is a top view of the multifunctional test bench;

[0014] Figure 5 is a perspective view of the multifunctional test bench. DETAILED DESCRIPTION

[0015] Embodiment 1

[0016] In combination, Figures 1-5 The present embodiment provides a multifunctional test bench for a rudder wheel system, the test bench comprising a loading unit, a friction test unit and a comprehensive performance test unit, wherein the loading unit is located at the upper part of the test bench, and a rudder wheel to be tested is fixed in the loading unit through a worm screw elevator; the friction test unit and the comprehensive performance test unit are arranged side by side below the loading unit, and the loading unit moves above the friction test unit and the comprehensive performance test unit through a guide rail device.

[0017] The friction test unit is provided with a heavy load sliding block 14, a gear reduction motor and a linear guide rail, a horizontal pulling force is provided through the gear reduction motor in cooperation with the ball screw and the linear guide rail, and the heavy load sliding block is pushed to move relative to the rudder wheel tire;

[0018] The comprehensive performance test unit is provided with a metal pair of grinding wheels 18 and a magnetic powder brake 16, the magnetic powder brake 16 is connected with the metal pair of grinding wheels through a transmission shaft, the rudder wheel drives the metal pair of grinding wheels to rotate, and the metal pair of grinding wheels is provided with a load, a reverse brake torque is applied, and the comprehensive performance of the rudder wheel is tested.

[0019] As shown in Figure 1 The loading unit is a frame structure, including an upper moving frame 23, a lifting motor 1, a worm screw lifter 2, a coupling nut 3, a suspension system 5, a T-shaped sliding block 6 and an adapter plate 7.

[0020] The worm screw lifter 2 is arranged in the upper moving frame 23, the output shaft of the lifting motor 1 is connected with the worm screw lifter 2, the coupling nut 3 is sleeved on the middle shaft of the worm screw lifter 2, and the bottom end of the coupling nut 3 is pressed on the top plate of the suspension system 5; the bottom plate of the suspension system 5 is connected with the adapter plate 7 through the T-shaped sliding block 6, the rudder wheel system to be tested is mounted below the adapter plate 7, the adapter plate 7 is in the shape of a cylindrical boss, and one side of the boss has a fan-shaped opening.

[0021] In the loading unit, the lifting motor 1 and the worm screw lifter 2 are both installed at the top end of the upper moving frame 23, the output shaft of the lifting motor 1 is connected with the worm screw lifter 2, the bottom end of the coupling nut 3 is connected with the first tensile and compressive force sensor 4 and then is pressed on the top plate of the suspension system 5, the bottom plate of the suspension system 5 is connected with the adapter plate 7 through the T-shaped sliding block 6, and the rudder wheel system to be tested can be installed. In the suspension system 5, the top plate is connected with the bottom plate through the bottom thread of the optical shaft, a linear bearing is arranged between the optical shaft and the top plate, mounting strips are connected to the two sides of the top plate and the bottom plate, rectangular springs are mounted between the mounting strips, guide rods pass through the two sides of the mounting strips, linear bearings are arranged between the guide rods and the mounting strips, and the two ends of the guide rods are fixed to the upper moving frame 23 through shaft fixing seats.

[0022] As shown in Figure 3 and Figure 5 The suspension system 5 includes a top plate 501, a bottom plate 502, rectangular springs 503, linear bearings 504, an optical shaft 505, mounting strips 506, guide rods 507 and shaft fixing seats 508; the top plate 501 and the bottom plate 502 are arranged in parallel, the top plate 501 is connected with the bottom plate 502 through the optical shaft 505, and a linear bearing 504 is arranged between the optical shaft 505 and the top plate 501; mounting strips 506 are arranged on the two sides of the top plate 501 and the bottom plate 502, the mounting strips 506 also have a top-bottom corresponding structure, and rectangular springs 503 are arranged between the top mounting strips and the bottom mounting strips; the top plate 501 is in the shape of H, has a circular opening in the middle and is used for passing through the optical shaft 505. The bottom plate 502 is also in the shape of H, has a threaded opening in the middle and is used for connecting the optical shaft 505, and has a T-shaped slot at the bottom and is used for mounting the T-shaped sliding block 6.

[0023] The guide rod 507 passes through both sides of the mounting strip 506, penetrating the top and bottom mounting strips. A linear bearing 504 is provided at the connection between the guide rod 507 and the mounting strip 506. Both ends of the guide rod 507 are fixed to the upper movable frame 23 by shaft fixing seats 508.

[0024] In order to control the amount of pressure applied to the steering wheel, the loading unit is also equipped with a first tension / compression sensor 4, which is installed at the bottom of the connecting nut 3.

[0025] like Figure 3 As shown, the friction testing unit is located on one side of the bottom support frame 22. The friction testing unit includes a gear reducer motor 8, a first coupling 9, a ball screw 10, and a heavy-duty linear guide rail 12. The gear reducer motor 8 is mounted on the bottom support frame 22, and its output shaft is connected to the ball screw 10 via the first coupling 9. The optical shafts at both ends of the ball screw 10 are mounted on the bearing seat 30 via deep groove ball bearings 29. A screw nut 1001 is provided on the ball screw 10, and the screw nut 1001 is connected to the heavy-duty slider 14. The heavy-duty slider 14 is set on the heavy-duty linear guide rail 12 on the bottom support frame 22. As a preferred embodiment of this application, the heavy-duty linear guide rail 12 is provided with protective covers 13 on both sides and first limiters 28 at both ends for stroke limitation.

[0026] In order to control the magnitude of the thrust applied to the steering wheel, the friction test unit also includes a second tension / compression sensor 11, which is connected to the lead screw nut 1001 and located between the lead screw nut 1001 and the heavy-duty slider 14.

[0027] like Figure 2 As shown, the overall performance testing unit is located on the other side of the bottom support frame 22. The overall performance testing unit is equipped with a magnetic powder brake 16, a torque sensor 17, and a metal grinding wheel 18. The magnetic powder brake 16, torque sensor 17, and metal grinding wheel 18 are coaxially mounted and fixed at both ends to the bottom support frame 22. The magnetic powder brake 16 and the torque sensor 17 are connected by a second coupling 20, and the torque sensor 17 and the metal grinding wheel 18 are connected by a third coupling 19 and a drive shaft 21.

[0028] Furthermore, the surface of the metal grinding wheel 18 is provided with a removable barrier strip 1801.

[0029] In the friction test unit, the gear reduction motor 8 is installed on the bottom support frame 22, the output shaft is connected with the ball screw 10 through the first coupling 9, the optical axis at both ends of the ball screw 10 is installed on the bearing seat 30 through the deep groove ball bearing 29, the screw nut 1001 is connected with the heavy load slider 14 after connecting the second tensile and compressive force sensor 11, and the heavy load slider 14 is arranged on the heavy load linear guide rail 12 installed on the bottom support frame 22. The center of the heavy load slider 14 is provided with a through hole for passing through the ball screw 10, and the top surface can be provided with a material block 15 for testing the friction coefficient.

[0030] In the comprehensive performance test unit, the magnetic powder brake 16, the torque sensor 17 and the metal pair grinding wheel 18 are all installed on the bottom support frame 22, the magnetic powder brake 16 and the torque sensor 17 are connected through the second coupling 20, the torque sensor 17 and the metal pair grinding wheel 18 are connected through the third coupling 19 and the transmission shaft 21, and the test unit can be used to apply a reverse braking torque.

[0031] As shown in Figure 4 The upper moving frame 23 and the bottom support frame 22 are provided with a linear guide rail 24, a slider 25 and a screw rod 26, and the upper moving frame 23 is moved along the bottom support frame 22 by rotating the hand wheel 27, and the linear guide rail 24 is provided with a second limiter 31 at both ends for protection.

[0032] The multifunctional test bench for the steering wheel system provided in the embodiment can perform comprehensive performance tests and friction coefficient tests and other basic tests.

[0033] The comprehensive performance test refers to that the test bench can provide a rated pressure loading condition for the steering wheel. Specifically, the loading unit is moved above the comprehensive performance test unit by rotating the hand wheel 27, the slider 25 of the upper moving frame 23 is locked on the linear guide rail 24 by a screw, after the steering wheel to be tested is installed on the adapter plate 7 and the T-shaped slider 6, the T-shaped slider 6 is slid into the T-shaped groove of the bottom plate of the suspension system 5. The lifting motor 1 controls the worm screw lifter 2 to press the steering wheel on the metal pair grinding wheel 18 through the suspension system 5, the magnetic powder brake 16 applies a load torque according to needs, and the steering wheel driver controls the steering wheel to complete relevant operation tests under the pressure loading condition according to needs.

[0034] Embodiment 2

[0035] Based on the multifunctional test bench for the steering wheel system, the embodiment provides a method for testing the steering wheel system, and the testing method comprises the following steps: rotating the hand wheel 27 to move the loading unit above the friction test unit, locking the slider 25 of the upper moving frame 23 on the linear guide rail 24 by a screw; after the steering wheel to be tested is installed on the adapter plate 7 and the T-shaped slider 6, the T-shaped slider 6 is slid into the T-shaped groove of the bottom plate of the suspension system 5.

[0036] The lifting motor 1 controls the worm screw 26 to lift the rudder through the suspension system 5 and press it on the friction test unit, and the ball screw 10 is driven by the gear reduction motor 8 to move the material block 15.

[0037] During the test, the tensile and compressive force sensors for measuring the loading force and friction force feed data to the control system in real time, the lifting motor 1 is controlled according to the loading force requirement to ensure the stability of the loading force, and the friction coefficient value is calculated according to the test data of the two tensile and compressive force sensors after the test is completed.

[0038] The friction coefficient test refers to the rudder tire friction coefficient test, the rudder system obstacle test and the rudder system ditch test on the test bench. The specific method is as follows: the loading unit is moved above the friction test unit by rotating the hand wheel 27, the slider 25 of the upper moving frame 23 is locked on the linear guide rail 24 by screws, the rudder to be tested is installed on the adapter plate 7 and the T-shaped slider 6, and then the T-shaped slider is slid into the T-shaped groove of the bottom plate of the suspension system 5. The lifting motor 1 controls the worm screw 26 to lift the rudder through the suspension system 5 and press it on the friction test unit, and the ball screw 10 is driven by the gear reduction motor 8 to move the material block 15, during the test, the tensile and compressive force sensors for measuring the loading force and friction force feed data to the control system in real time, the lifting motor 1 is controlled according to the loading force requirement to ensure the stability of the loading force, and the friction coefficient value is calculated according to the test data of the two tensile and compressive force sensors after the test is completed. When the obstacle and ditch tests are performed, the material block 15 is only replaced by an obstacle block and a steel plate with a groove.

[0039] Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Those skilled in the art can make various modifications and improvements without departing from the spirit and scope of the present application. Therefore, the protection scope of the present application shall be subject to the scope defined by the claims.

Claims

1. A test method for a multi-functional test bench for steering wheel systems, characterized in that, The test bench includes a loading unit, a friction test unit, and a comprehensive performance test unit. The loading unit is located at the top of the test bench and the steering wheel to be tested is fixed therein by a worm gear screw jack. The friction test unit and the comprehensive performance test unit are arranged side by side below the loading unit, and the loading unit moves above the friction test unit and the comprehensive performance test unit by a guide rail device. The friction test unit is equipped with a heavy-duty slider (14), a gear reduction motor and a linear guide rail. The gear reduction motor, in conjunction with the ball screw and the linear guide rail, provides horizontal tension to push the heavy-duty slider to move relative to the steering wheel tire. The friction test unit is located on one side of the bottom support frame (22). The friction test unit is equipped with a gear reducer motor (8), a first coupling (9), a ball screw (10), and a heavy-duty linear guide rail (12). The gear reducer motor (8) is mounted on the bottom support frame (22). The output shaft is connected to the ball screw (10) through the first coupling (9). The optical shafts at both ends of the ball screw (10) are mounted on the bearing seat (30) through deep groove ball bearings (29). The ball screw (10) is equipped with a screw nut (1001). The screw nut (1001) is connected to the heavy-duty slider (14). The heavy-duty slider (14) is set on the heavy-duty linear guide rail (12) on the bottom support frame (22). The center of the heavy-duty slider (14) has a through hole for the ball screw (10) to pass through. The top surface of the heavy-duty slider (14) is equipped with a material block (15) for friction coefficient testing. The loading unit is a frame structure, including an upper movable frame (23), a lifting motor (1), a worm gear screw jack (2), a connecting nut (3), a suspension system (5), a T-shaped slider (6), and a transition plate (7); A worm gear screw jack (2) is provided inside the upper movable frame (23). The output shaft of the lifting motor (1) is connected to the worm gear screw jack (2). The connecting nut (3) is fitted on the central shaft of the worm gear screw jack (2). The bottom end of the connecting nut (3) is pressed against the top plate of the suspension system (5). The bottom plate of the suspension system (5) is connected to the adapter plate (7) through a T-shaped slider (6). The steering wheel system to be tested is installed below the adapter plate (7). The comprehensive performance testing unit is equipped with a metal grinding wheel (18) and a magnetic powder brake (16). The magnetic powder brake (16) is connected to the metal grinding wheel through a transmission shaft. When the steering wheel drives the metal grinding wheel to rotate, it provides a load and applies a reverse braking torque to test the comprehensive performance of the steering wheel. The overall performance testing unit is located on the other side of the bottom support frame (22). The overall performance testing unit is equipped with a magnetic powder brake (16), a torque sensor (17), and a metal grinding wheel (18). The magnetic powder brake (16), torque sensor (17), and metal grinding wheel (18) are coaxially installed and fixed at both ends to the bottom support frame (22). The magnetic powder brake (16) and the torque sensor (17) are connected by a second coupling (20), and the torque sensor (17) and the metal grinding wheel (18) are connected by a third coupling (19) and a drive shaft (21). A linear guide rail (24), a slider (25), and a lead screw (26) are provided between the upper moving frame (23) and the bottom support frame (22). The upper moving frame (23) can be moved along the bottom support frame (22) by rotating the handwheel (27). The linear guide rail (24) is provided with second limiters (31) at both ends for protection. The test method includes: rotating the handwheel (27) to move the loading unit above the friction test unit, locking the slider (25) of the upper moving frame (23) to the linear guide rail (24) with screws; installing the adapter plate (7) and T-shaped slider (6) on the steering wheel to be tested, and then sliding it into the T-shaped groove of the suspension system (5) base plate; The lifting motor (1) controls the worm gear screw jack (2) to press the steering wheel onto the friction test unit through the suspension system (5), and drives the material block (15) to move through the gear reduction motor (8) and ball screw (10); During the test, the tension and compression sensors used to measure the loading force and friction force feed the data back to the control system in real time. The lifting motor (1) is controlled according to the loading force requirements to ensure the stability of the loading force. After the test is completed, the friction coefficient value is calculated based on the test data of the two tension and compression sensors.

2. The testing method for the multifunctional test bench for steering wheel systems according to claim 1, characterized in that, The suspension system (5) includes a top plate (501), a bottom plate (502), a rectangular spring (503), a linear bearing (504), a light shaft (505), a mounting strip (506), a guide rod (507), and a shaft fixing seat (508); wherein, the top plate (501) and the bottom plate (502) are arranged in parallel, the top plate (501) is connected to the bottom plate (502) through the light shaft (505), and a linear bearing (504) is provided between the light shaft (505) and the top plate (501); the top plate (501) Mounting strips (506) are provided on both sides of the base plate (502). The mounting strips (506) also have a top-bottom corresponding structure. A rectangular spring (503) is provided between the top mounting strip and the bottom mounting strip. The guide rod (507) passes through both sides of the mounting strip (506) and passes through the top mounting strip and the bottom mounting strip. A linear bearing (504) is provided at the connection between the guide rod (507) and the mounting strip (506). The two ends of the guide rod (507) are fixed to the upper movable frame (23) through the shaft fixing seat (508).

3. The testing method for the multifunctional test bench for steering wheel systems according to claim 1, characterized in that, The loading unit is also provided with a first tension and compression sensor (4), which is installed at the bottom of the connecting nut (3).

4. The testing method for the multifunctional test bench for steering wheel systems according to claim 1, characterized in that, The friction testing unit also includes a second tension / compression sensor (11), which is connected to the lead screw nut (1001) and located between the lead screw nut (1001) and the heavy-duty slider (14).

5. The testing method for the multifunctional test bench for steering wheel systems according to claim 1, characterized in that, The surface of the metal grinding wheel (18) is provided with a removable barrier strip (1801).

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