Universal chassis adjusting mechanism applied to steering abnormal sound test bench

Abstract

The utility model relates to the field of automobile testing, and discloses a universal chassis adjusting mechanism applied to a steering abnormal sound test bench, which comprises a base, two sides of the base are oppositely connected with sliding seats in a sliding manner, and the base is detachably connected with a mounting seat used for mounting a steering assembly between the sliding seats on the two sides. The mounting seat can adjust the height of the steering assembly on the base, the sliding seat is vertically and rotatably provided with a rotating shaft, the rotating shaft is vertically and movably connected with a swing arm assembly used for being connected with the steering assembly, and the sliding seat is provided with a motor used for driving the rotating shaft to rotate. The mounting base adjusts the height of the steering assembly on the test bench, the sliding base is connected with the two ends of the steering assembly through the rotating shaft and the swing arm assembly, so that the steering assembly is fixed to the test bench, the sliding base adjusts the distance between the steering assembly and the test bench, and the mounting base can adjust the height, front-back and left-right positions of the steering assembly on the test bench. Therefore, the installation positions of the steering system under different working conditions are accurately simulated.

Description

Technical Field

[0001] This utility model relates to the field of automotive testing, specifically to a universal chassis adjustment mechanism applied to a steering noise test bench. Background Technology

[0002] Noise testing of the power steering system is an important part of the performance evaluation of the electric power steering (EPS) system in automobiles. The bottom of the power steering assembly is equipped with a mounting position for connecting to the testing device. The purpose is to ensure that the noise level of the steering system meets the standard requirements under different operating conditions, thereby improving the driving experience and vehicle safety.

[0003] In real-world road conditions, the position of the steering system changes with the chassis height, which can cause abnormal noises in the vehicle's steering system. Therefore, before vehicle manufacturing, the steering system needs to be fixed on a noise test bench. By applying excitation, the operation of the steering system under different working conditions can be simulated to reproduce the noise problem, analyze and find solutions and optimization methods. However, existing test benches usually use fixed supports or simple height adjustment mechanisms, which are difficult to accurately simulate the installation position of the steering system under different working conditions, thus affecting the accuracy and reliability of the test results. To comprehensively simulate the noise level of the steering system under different working conditions, the bench testing process should have the ability to adjust the steering shaft in multiple directions (front-back, left-right, and up-down) to match the steering gear posture under different chassis heights, ensuring the accuracy and representativeness of the test results. Utility Model Content

[0004] The present invention aims to provide a universal chassis adjustment mechanism for use in a steering noise test bench, so as to solve the problem that the test bench in the prior art is difficult to accurately simulate the installation position of the steering system under different working conditions.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a universal chassis adjustment mechanism for a steering noise test bench, comprising a base, sliding seats slidably connected to both sides of the base, a mounting seat for mounting a steering assembly detachably connected between the two sliding seats, the mounting seat adjusting the height of the steering assembly on the base, a rotating shaft vertically rotatably mounted on the sliding seat, a swing arm assembly for connecting to the steering assembly being movably connected up and down on the rotating shaft, and a motor for driving the rotating shaft to rotate on the sliding seat.

[0006] The beneficial effects of this solution are as follows: the mounting base securely connects the steering assembly and adjusts its height and lateral position on the test bench. The sliding base connects both ends of the steering assembly via a pivot and a swing arm assembly, thus fixing the steering assembly on the test bench. The sliding bases on both sides can slide, and the distance between them can be adjusted according to the different lengths of the steering assembly. The mounting base can adjust the height, forward / backward, and lateral positions of the steering assembly on the test bench, thereby accurately simulating the installation position of the steering system under different working conditions. Compared with existing technologies, it can fully simulate the impact of chassis height changes on the installation position of the steering system and its abnormal noises. Under limited technology, it minimizes the deviation between test results and actual working conditions. The multi-degree-of-freedom adjustment capability can evaluate the noise characteristics of the steering system under different postures and can identify all problems of the steering system in the laboratory to the greatest extent possible, so as to make targeted improvements to the steering system.

[0007] Furthermore, a number of sliders are fixed at the bottom of the mounting base, and a number of first grooves are provided on the base for the sliders of the mounting base to be inserted. The mounting base is vertically slidably provided with a mounting block, and a tooling is detachably connected to the top of the mounting block. The tooling is used to connect with the mounting position of the steering assembly.

[0008] The beneficial effects of this solution are as follows: the tooling can be detachably connected to the mounting block. Different sizes and models of tooling are required to match the steering assemblies of different vehicle models. Therefore, the detachable tooling setting can achieve the purpose of testing various steering assemblies.

[0009] Furthermore, the mounting block is also fixedly provided with several sliders, and the mounting base is vertically provided with several second sliding grooves for the sliders of the mounting block to be embedded in, and the tooling bolts are connected to the top of the mounting block.

[0010] Furthermore, the first slide groove and the slider at the bottom of the mounting base are set at equal intervals, and the spacing is equal.

[0011] Furthermore, the swing arm assembly includes a bushing for connection with the pivot and a swing arm detachably connected to the bushing. The bushing is fitted onto the pivot and has a connecting groove for the swing arm to be inserted. The bushing and the swing arm are also fixedly connected by bolts.

[0012] The beneficial effect of this solution is that by setting up the swing arm assembly, the axial force of the pivot shaft can be transformed into a pulling force on both ends of the steering assembly.

[0013] Furthermore, the rocker arm is provided with a connection hole, through which a load assembly is connected. The end of the load assembly away from the rocker arm is used to connect to the steering assembly.

[0014] Furthermore, the load assembly includes a connecting rod for connecting to the steering assembly and a connector for connecting to the rocker arm. The connecting rod has a connecting sleeve at its end near the steering assembly for the end of the steering assembly to be fitted into. The connector is bolted to the rocker arm.

[0015] The beneficial effects of this solution are: the connection between the end of the steering assembly and the connecting cylinder allows for micro-adjustment according to the required length, which enhances the adaptability of the test bench.

[0016] Furthermore, a cylinder is installed on the base, and the cylinder's lifting rod is connected to the sliding seat. The cylinder is used to drive the sliding seat to slide on the base.

[0017] Furthermore, an adjusting element is provided between the bushing and the rotating shaft to adjust the friction between them.

[0018] The beneficial effects of this solution are as follows: After the height of the steering assembly is adjusted, different pulling forces are required at both ends of the assembly according to different actual conditions. These forces can be horizontal or inclined. The adjustment is made as needed to make the friction between the adjusting parts and the bushing unequal, thereby further adapting to the ideal position of the bushing. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the steering assembly installed in an embodiment of the present invention;

[0020] Figure 2 This is a partial structural diagram of the connection between the mounting base and the base at embodiment A of this utility model;

[0021] Figure 3 This is a partial structural diagram of the swing arm assembly at point B of this utility model, which is connected to the steering assembly via a load assembly. Detailed Implementation

[0022] The following detailed description illustrates the specific implementation method:

[0023] The reference numerals in the accompanying drawings include: base 1, first slide groove 11, cylinder 12, sliding seat 2, rotating shaft 21, motor 22, mounting seat 3, mounting block 31, tooling 32, second slide groove 33, load assembly 4, connecting rod 41, connecting cylinder 411, connecting piece 42, swing arm assembly 5, bushing 51, connecting groove 511, shrink sleeve 512, swing rod 52, and connecting hole 521.

[0024] Example

[0025] A general-purpose chassis adjustment mechanism applied to a steering noise test bench, such as Figure 1-3As shown, the system includes a base 1, with sliding seats 2 slidably connected to both sides of the top of the base 1. A guide plate is fixedly welded to the top of the base 1, with both sides of the guide plate protruding from the sides of the base 1. Guide wheels corresponding to the protruding guide plates are provided on both sides of the sliding seats 2, and the guide wheels are tangent to the bottom of the guide plates. Cylinders 12 are also fixedly installed at both ends of the base 1. The ends of the telescopic rods of the cylinders 12 are fixedly connected to the sliding seats 2. The cylinders 12 extend and retract, and through the telescopic rods, drive the sliding seats 2 to slide on the upper surface of the base 1. By setting rollers, the friction between the sliding seats 2 and the base 1 can be effectively reduced. Fixed holes are arranged at equal intervals at both ends of the base 1 and the sliding seats 2. Bolts are connected to the fixed holes of the sliding seats 2, and the bolts penetrate the sliding seats 2 and connect to the fixed holes of the base 1, thereby fixing the sliding seats 2 to the base 1.

[0026] like Figure 1-3 As shown, a connecting frame is fixedly welded to the sliding seat 2. A cavity is formed between the bottom end of the connecting frame and the bottom end of the sliding seat 2. A rotating shaft 21 is rotatably connected inside the cavity. A motor 22 is fixedly installed at the top of the connecting frame. The output end of the motor 22 is coaxially connected to the rotating shaft 21. The motor 22 is used to drive the rotating shaft 21 to rotate. A swing arm assembly 5 is sleeved on the rotating shaft 21. The swing arm assembly 5 includes a bushing 51 sleeved on the outer ring of the rotating shaft 21. An adjusting element is sleeved between the bushing 51 and the rotating shaft 21. The adjusting element is preferably a tightening sleeve 512. A vertical opening is formed on the tightening sleeve 512. The sleeve has several threaded holes, all of which are connected to bolts. All bolts are connected to the expansion sleeve 512, which can cause the expansion sleeve 512 to expand and tighten. This causes the inner ring of the expansion sleeve 512 to abut against the rotating shaft 21 and the outer ring to abut against the bushing 51, thus achieving an interference fit between the bushing 51 and the rotating shaft 21. The bushing 51 has a connecting groove 511 perpendicular to the axial direction of the rotating shaft 21. A rocker arm 52 is embedded in the connecting groove 511. The rocker arm 52 is fixedly connected to the bushing 51 by bolts. The rocker arm 52 has a connecting hole 521, which vertically penetrates the rocker arm 52.

[0027] like Figure 1-3As shown, the base 1 has several equally spaced first grooves 11 on the left and right sides of the middle. A mounting seat 3 is slidably connected in the first groove 11. The number of mounting seats 3 is at least one. In this scheme, the number of mounting seats 3 is set to two that are exactly the same. A slider corresponding to the first groove 11 is fixed at the bottom of the mounting seat 3. The sliders are equally spaced and embedded in the first groove 11. The mounting seat 3 is also threaded with bolts. The bolts are used to press against the base 1 to fix the mounting seat 3 to the base 1. The mounting seat 3 is vertically slidably connected with a mounting block 31. The mounting seat 3 has several second grooves 33 vertically. The mounting block 31 is also fixed with a slider. The slider is embedded in the second groove 33. The second groove 33 and the slider on the mounting block 31 are equally spaced and have equal spacing. The mounting block 31 is horizontally connected with bolts. The bolts press against the vertical surface of the mounting seat 3 to fix the mounting block 31 to the mounting seat 3. The top of the mounting block 31 is horizontally set. The top of the mounting block 31 is bolted with a tooling 32 for connecting with the mounting position of the steering assembly.

[0028] The swing arm 52 is fixedly connected to the load assembly 4 through the connection hole 521. The load assembly 4 includes a connecting rod 41 and a connector 42 fixedly welded together. The connector 42 also has a threaded hole. The connector 42 and the swing arm 52 are fixedly connected by nuts and bolts. The end of the connecting rod 41 away from the connector 42 has a connecting cylinder 411. The connecting cylinder 411 is a threaded cylinder. The connecting rod 41 is connected to the end of the steering assembly through the threaded cylinder. When the length of the steering assembly is greater than the length reserved on the test bench, it can be finely adjusted through the connection between the threaded cylinder and the steering assembly, thus improving the adaptability of the test bench.

[0029] Its working principle is as follows: Before the experiment begins, the virtual map or real-world map data to be tested is imported into the test bench, and the control system and motor 22 are connected. The control system is used to control the motor 22 to output a specific rotational load according to the actual situation. The mounting position of the assembly to be tested and the tooling 32 are bolted together. According to the actual needs, the mounting seat 3 is selected to be inserted into the corresponding first slide groove 11, and the position of the mounting seat 3 on the base 1 is fixed by tightening the bolts on the mounting seat 3 against the base 1. The swing arm assembly 5 and the steering assembly are connected through the load assembly 4. The positions of the sliding seats 2 on both sides and the position of the tension sleeve 512 are adjusted in advance according to the actual situation. After the mounting seat 3 adjusts the height of the steering assembly through the mounting block 31, the vertical position of the tension sleeve 512 can be adjusted according to the actual situation. When it is necessary to provide an inclined load to the steering assembly, the position of the tension sleeve 512 is not adjusted. When it is necessary to provide a horizontal load, the height of the tension sleeve 512 needs to be adjusted.

[0030] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A universal chassis adjustment mechanism for a steering misalignment test stand, characterized in that: The system includes a base, with sliding seats slidably connected to both sides of the base. A mounting seat for mounting the steering assembly is detachably connected between the two sliding seats. The mounting seat can adjust the height of the steering assembly on the base. A rotating shaft is vertically rotatable on the sliding seat. A swing arm assembly for connecting to the steering assembly is movably connected to the rotating shaft. A motor for driving the rotating shaft is installed on the sliding seat.

2. The universal chassis adjustment mechanism of claim 1, wherein: The bottom of the mounting base is fixed with several sliders, and the base is provided with several first grooves for the sliders of the mounting base to be inserted. The mounting base is vertically slidably provided with a mounting block, and the top of the mounting block is detachably connected with a tooling, which is used to connect with the mounting position of the steering assembly.

3. The universal chassis adjustment mechanism of claim 2, wherein: The mounting block is also fixedly equipped with several sliders, and the mounting base is vertically provided with several second sliding grooves for the sliders of the mounting block to be embedded in. The tooling bolts are connected to the top of the mounting block.

4. The universal chassis adjustment mechanism of claim 2, wherein: The first slide groove and the slider at the bottom of the mounting base are set at equal intervals.

5. The universal chassis adjustment mechanism of claim 1, wherein: The swing arm assembly includes a bushing for connection with a pivot and a swing arm detachably connected to the bushing. The bushing is fitted onto the pivot and has a connecting groove for the swing arm to be inserted. The bushing and the swing arm are also fixedly connected by bolts.

6. The universal chassis adjustment mechanism of claim 5, wherein: The rocker arm is provided with a connection hole, through which a load assembly is connected. The end of the load assembly away from the rocker arm is used to connect to the steering assembly.

7. The universal chassis adjustment mechanism of claim 6, wherein: The load assembly includes a connecting rod for connecting to the steering assembly and a connector for connecting to the rocker arm. The connecting rod has a connecting sleeve near the end of the steering assembly for the end of the steering assembly to be fitted. The connector is bolted to the rocker arm.

8. The universal chassis adjustment mechanism of claim 1, wherein: A cylinder is installed on the base, and the cylinder's lifting rod is connected to the sliding seat. The cylinder is used to drive the sliding seat to slide on the base.

9. The universal chassis adjustment mechanism of claim 5, wherein: An adjusting element is provided between the bushing and the shaft to adjust the friction between them.

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