Steering wheel testing device based on hydraulic loading

Abstract

The invention discloses a steering wheel testing device based on hydraulic loading, which comprises a fixed pile, a hydraulic loading arm assembly is arranged on the surface of the fixed pile, the hydraulic loading arm assembly comprises a rotary sleeve seat and a pin shaft, and the rotary sleeve seat is sleeved on the surface of the fixed pile. The to-be-tested steering wheel is loaded through the loading hydraulic cylinder, the actual load condition of the steering wheel is simulated, loading is carried out through the loading hydraulic cylinder, traditional balancing weight loading is replaced, the occupied size is small, the storage space of a balancing weight does not need to be reserved, the load is flexibly set according to different test working conditions, and the test efficiency is improved. The balancing weight does not need to be manually placed and taken down, manpower is saved, the steering wheel is subjected to operation testing around the fixing pile, the occupied testing space is small, the device can limit the operation range of the steering wheel, the testing safety is improved, manual guarding is not needed, the steering wheel walks on the ground, the actual working condition can be truly reflected, and the testing result is more accurate.

Description

Technical Field

[0001] The invention relates to the technical field of AGVs, and in particular to a steering wheel testing device based on hydraulic loading. Background Art

[0002] AGV is a transport vehicle equipped with electromagnetic or optical automatic guidance devices, which can travel along the specified guidance path and has safety protection and various transfer functions. In industrial applications, it does not require a driver and uses rechargeable batteries as its power source. AGV is increasingly widely used in various industries. The steering wheel, as the most commonly used driving wheel form of AGV, has also been vigorously developed. Its performance testing has become increasingly important. At present, the industry's steering wheel load test is not perfect, especially the steering wheel test in heavy-load scenarios, which requires a large load and site for testing;

[0003] During the prototype vehicle load test, all the wheels required for the entire vehicle need to be manufactured and assembled into a complete vehicle, and then the load test is carried out through a counterweight. This method requires a large investment, a large site for the operation of the AGV vehicle, and a large number of counterweight loads. In addition, the single-wheel roller test bench has a steering wheel walking on the roller, which cannot simulate the actual resistance situation. Summary of the invention

[0004] The purpose of the present invention is to provide a steering wheel testing device based on hydraulic loading, which has the advantage of more accurate test results and solves the problem that during the load test of a prototype vehicle, all the wheels required for the entire vehicle need to be manufactured and assembled into a complete vehicle, and then a load test is performed through a counterweight. This method requires a large investment, a large site for the operation of the AGV vehicle, and a large number of counterweight loads. In addition, the single-wheel roller test bench has the steering wheel walking on the roller and cannot simulate the actual resistance situation.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: a steering wheel testing device based on hydraulic loading, comprising a fixed pile, a surface of the fixed pile is provided with a hydraulic loading arm assembly, the hydraulic loading arm assembly comprises a swivel sleeve seat and a pin shaft, the swivel sleeve seat is sleeved on the surface of the fixed pile, the upper end and the lower end of one side of the swivel sleeve seat are fixedly connected with ear seats, and the upper ear seat and the lower ear seat are respectively movably connected with a loading hydraulic cylinder and a loading swing arm, the loading hydraulic cylinder, the loading swing arm and the ear seat are movably connected through the pin shaft, the other end of the loading hydraulic cylinder is movably connected to the loading swing arm through the pin shaft, the other end of the loading swing arm is provided with a steering wheel connecting assembly, a steering wheel is provided below the steering wheel connecting assembly, and the steering wheel connecting assembly comprises a steering wheel mounting plate.

[0006] Preferably, the hydraulic loading arm assembly also includes an electric control box and a hydraulic compartment arranged on both sides of the loading swing arm, and a guide sleeve arranged at the right end of the loading swing arm.

[0007] Preferably, the steering wheel connecting assembly also includes a guide shaft arranged above the steering wheel mounting plate, the guide shaft passes through a guide sleeve, the top end of the guide shaft is threadedly connected to a shaft end retaining ring via a screw, and a pressure sensor is arranged between the steering wheel mounting plate and the loading swing arm.

[0008] Preferably, the top of the fixing pile is threadedly connected with a gland via a screw, and a plane thrust bearing is provided on the surface of the fixing pile and between the gland and the rotary sleeve seat.

[0009] The test steps are as follows:

[0010] A. Install the steering wheel and connect the relevant control lines and power lines of the steering wheel;

[0011] B. Start the loading hydraulic cylinder and load the load to the set value;

[0012] C. Start the steering wheel, and let it rotate around the fixed pile under the set load to simulate the loading test.

[0013] D. Record the steering wheel running time, real-time load, running current, rubber wheel wear, noise and other data.

[0014] E. Analyze data and form a test report.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention loads the steering wheel to be tested by a loading hydraulic cylinder to simulate the actual load condition of the steering wheel. The loading is performed by the loading hydraulic cylinder, which replaces the traditional loading of the counterweight block. The volume occupied is small and there is no need to reserve storage space for the counterweight block. The load is flexibly set according to different test conditions. There is no need to manually put on and remove the counterweight block, which saves manpower. The steering wheel is tested for running around a fixed pile, and the occupied test space is small. The device can limit the running range of the steering wheel, which improves the safety of the test. No manual supervision is required. The steering wheel moves on the ground, which can truly reflect the actual working condition and the test result is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the structure of the hydraulic loading arm assembly of the present invention;

[0019] Figure 3 It is a side view structural schematic diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the steering wheel connection assembly of the present invention;

[0021] Figure 5 This is the schematic diagram of the hydraulic loading system.

[0022] In the figure: 1. fixed pile; 2. hydraulic loading arm assembly; 21. swivel sleeve seat; 22. loading hydraulic cylinder; 23. loading swing arm; 24. electric control box; 25. hydraulic warehouse; 26. pin shaft; 27. guide sleeve; 3. plane thrust bearing; 4. pressure cover; 5. steering wheel connection assembly; 51. steering wheel mounting plate; 52. guide shaft; 53. shaft end retaining ring; 54. pressure sensor; 6. steering wheel. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figure 1-4 As shown, it is the first embodiment of the present invention, which provides a steering wheel testing device based on hydraulic loading, including a fixed pile 1, a hydraulic loading arm assembly 2 is arranged on the surface of the fixed pile 1, and the hydraulic loading arm assembly 2 includes a swivel sleeve seat 21 and a pin shaft 26. The swivel sleeve seat 21 is sleeved on the surface of the fixed pile 1, and the upper end and the lower end of one side of the swivel sleeve seat 21 are fixedly connected with ear seats, and the upper ear seat and the lower ear seat are respectively movably connected with a loading hydraulic cylinder 22 and a loading swing arm 23, the loading hydraulic cylinder 22, the loading swing arm 23 and the ear seat are movably connected through the pin shaft 26, the other end of the loading hydraulic cylinder 22 is movably connected to the loading swing arm 23 through the pin shaft 26, the other end of the loading swing arm 23 is provided with a steering wheel connecting assembly 5, a steering wheel 6 is arranged below the steering wheel connecting assembly 5, and the steering wheel connecting assembly 5 includes a steering wheel mounting plate 51.

[0026] like Figure 1-4As shown, the steering wheel 6 to be tested is connected to the steering wheel mounting plate 51 by screws, and when the loading hydraulic cylinder 22 is extended or retracted, the loading swing arm 23 is driven to swing around the pin shaft 26, thereby adding or subtracting the load to the steering wheel 6 arranged at the end of the loading swing arm 23. The loading is performed by the loading hydraulic cylinder 22, which replaces the traditional counterweight loading, occupies a small volume, and does not require a storage space for the counterweight. The load is flexibly set according to different test conditions, and there is no need to manually put on and remove the counterweight, which saves manpower. The steering wheel 6 is tested for running around the fixed pile 1, and the test space occupied is small. The device can limit the running range of the steering wheel 6, improves the safety of the test, and does not require manual supervision. The steering wheel 6 walks on the ground, which can truly reflect the actual working conditions and the test results are more accurate.

[0027] Example 2

[0028] Reference Figure 1-2 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0029] In this embodiment, the hydraulic loading arm assembly 2 further includes an electric control box 24 and a hydraulic compartment 25 disposed on both sides of the loading swing arm 23 , and a guide sleeve 27 disposed on the right end of the loading swing arm 23 .

[0030] The top of the fixing pile 1 is connected with a pressure cap 4 via a screw thread, and a plane thrust bearing 3 is arranged on the surface of the fixing pile 1 and between the pressure cap 4 and the rotary sleeve seat 21 .

[0031] like Figure 1-2 As shown, the electric control box 24 is arranged on one side of the loading swing arm 23 for placing batteries and electric control components, and the hydraulic compartment 25 is arranged on the other side of the loading swing arm 23 for placing the hydraulic station.

[0032] When the hydraulic loading arm assembly 2 rotates around the fixed pile 1 , the planar thrust bearing 3 is used to reduce the friction resistance between the hydraulic loading arm assembly 2 and the gland 4 .

[0033] Example 3

[0034] Reference Figure 3-4 , which is the third embodiment of the present invention, and this embodiment is based on the previous two embodiments.

[0035] In this embodiment, the steering wheel connecting assembly 5 also includes a guide shaft 52 arranged above the steering wheel mounting plate 51, the guide shaft 52 passes through the guide sleeve 27, the top end of the guide shaft 52 is threadedly connected to a shaft end retaining ring 53 through a screw, and a pressure sensor 54 is arranged between the steering wheel mounting plate 51 and the loading swing arm 23.

[0036] like Figure 3-4As shown, the pressure sensor 54 is used to measure the load size above the steering wheel 6 in real time and provide servo feedback for the hydraulic system, thereby achieving precise control of the load.

[0037] Reference Figure 5 Through the feedback of the pressure sensor 54 and the precise control of the proportional relief valve, a hydraulic servo control system is formed, which can accurately adjust the loading pressure. The coil Y20 is controlled by the pressure feedback value of the pressure sensor 54, and the working pressure of the proportional relief valve is adjusted by controlling the coil Y20, so that the loading hydraulic cylinder 22 can output different thrusts, so that the load borne by the steering wheel 6 reaches the set value.

[0038] When in use, the steering wheel 6 to be tested is connected to the steering wheel mounting plate 51 through screws. When the loading hydraulic cylinder 22 is extended and retracted, the loading swing arm 23 is driven to swing around the pin shaft 26, thereby adding or subtracting load to the steering wheel 6 arranged at the end of the loading swing arm 23. The electric control box 24 is arranged on one side of the loading swing arm 23 for placing batteries and electronic control components. The hydraulic compartment 25 is arranged on the other side of the loading swing arm 23 for placing the hydraulic station. When the hydraulic loading arm assembly 2 rotates around the fixed pile 1, the plane thrust bearing 3 is used to reduce the friction between the hydraulic loading arm assembly 2 and the pressure cover 4. The friction resistance between the piles is reduced and loading is performed through the loading hydraulic cylinder 22, which replaces the traditional counterweight loading. It occupies a small volume and does not need to reserve storage space for the counterweight. The load can be flexibly set according to different test conditions. There is no need to manually put on and take off the counterweight, which saves manpower. The steering wheel 6 is tested for running around the fixed pile 1, and the test space occupied is small. The device can limit the running range of the steering wheel 6, improves the safety of the test, and does not require manual supervision. The steering wheel 6 walks on the ground, which can truly reflect the actual working conditions and the test results are more accurate.

[0039] The standard parts used in this application document can all be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented through simple programming by technicians in this field, which is common knowledge in the field. This application is mainly used to protect mechanical devices, so this application no longer explains the control method and circuit connection in detail.

[0040] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A steering wheel testing device based on hydraulic loading, comprising a fixed pile (1), characterized in that: A hydraulic loading arm assembly (2) is arranged on the surface of the fixed pile (1), and the hydraulic loading arm assembly (2) comprises a swivel sleeve seat (21) and a pin shaft (26). The swivel sleeve seat (21) is sleeved on the surface of the fixed pile (1). The upper end and the lower end of one side of the swivel sleeve seat (21) are fixedly connected to ear seats, and the upper ear seat and the lower ear seat are respectively movably connected to a loading hydraulic cylinder (22) and a loading swing arm (23). The loading hydraulic cylinder (22), the loading swing arm (23) and the ear seat are movably connected via a pin shaft (26). The other end of the loading hydraulic cylinder (22) and the loading swing arm (23) are movably connected via a pin shaft (26). The other end of the loading swing arm (23) is arranged with a steering wheel connection assembly (5), and a steering wheel (6) is arranged below the steering wheel connection assembly (5). The steering wheel connection assembly (5) comprises a steering wheel mounting plate (51).

2. A steering wheel testing device based on hydraulic loading according to claim 1, characterized in that: The hydraulic loading arm assembly (2) further comprises an electric control box (24) and a hydraulic compartment (25) arranged on both sides of the loading swing arm (23), and a guide sleeve (27) arranged at the right end of the loading swing arm (23).

3. A steering wheel testing device based on hydraulic loading according to claim 1, characterized in that: The steering wheel connection assembly (5) also includes a guide shaft (52) arranged above the steering wheel mounting plate (51), the guide shaft (52) passes through the guide sleeve (27), the top end of the guide shaft (52) is connected to a shaft end retaining ring (53) through a screw thread, and a pressure sensor (54) is arranged between the steering wheel mounting plate (51) and the loading swing arm (23).

4. A steering wheel testing device based on hydraulic loading according to claim 1, characterized in that: The top of the fixing pile (1) is connected to a gland (4) via a screw thread, and a plane thrust bearing (3) is provided on the surface of the fixing pile (1) and between the gland (4) and the rotary sleeve seat (21).

5. A steering wheel testing device based on hydraulic loading according to any one of claims 1 to 4, characterized in that: The test steps are as follows: A. Install the steering wheel (6) and connect the relevant control lines and power lines of the steering wheel (6); B. Start the loading hydraulic cylinder (22) and load the load to a set value; C. Start the steering wheel (6), and the steering wheel (6) rotates around the fixed pile (1) under the condition of carrying a set load, so as to simulate the loading test. D. Record the running time, real-time load, running current, wear of the rubber-coated wheel, noise and other data of the steering wheel (6). E. Analyze data and form a test report.

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