A test bench for abnormal noise of a steering assist system

Abstract

The application provides a noise test bench for a steering assist system, comprising a base, a steering gear fixing mechanism and a column driving mechanism; the column driving mechanism comprises a first base, a first lifting assembly and a driving assembly, the driving assembly comprises a first mounting block, a first rotating piece and a steering motor, the first mounting block is in transmission connection with the first lifting assembly, and the steering motor is provided with a connecting end; the steering gear fixing mechanism comprises a fixing table and two locking assemblies arranged at the two ends of the fixing table in the x direction, the locking assembly comprises a mounting seat and a locking device connected with the mounting seat, and the locking device has a locking end head which can move in the x direction. The column driving mechanism of the application is provided with a lifting assembly and a driving assembly, can adjust the height position angle of the driving assembly, is connected with the steering column from multiple directions and angles, makes the installation and fixation of the steering system assembly more convenient, and can be applied to various types of steering systems.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle detection, in particular to a noise test bench for a steering assist system. BACKGROUND

[0002] Vehicle noise is widely regarded as one of the important factors affecting vehicle comfort, especially as the market share of electric vehicles increases significantly year by year, the background noise is greatly reduced compared with fuel vehicles, at this time the noise during vehicle operation is more easily perceived, the noise level of the steering system is extremely important as a chassis system component that directly feedbacks to the driver and passengers.

[0003] The assembly structure of the steering system includes a steering gear, steering tie rods connected to both ends of the steering gear, and a steering column connected to the middle of the steering tie rods through the assist system. In the overall vehicle structure, the steering tie rods are connected to the steering mechanism of the vehicle, and the steering column is connected to the steering wheel. The steering instruction applied by the steering wheel during steering is acted on the assist system through the steering column, and the operation of the steering tie rod is controlled by the assist system. The entire steering process involves the movement of multiple components, so noise occurrence is common. For the assist system, in the general detection method, the noise during the power operation process is directly detected. This method cannot comprehensively simulate the actual working state of the assist system. The patent document with application number CN201510954467.4 discloses a noise detection bench for electric power steering column, which is connected to the steering column through a servo motor with a rotating shaft. The servo motor drives the steering column to rotate to simulate the steering operation in the simulation process, thereby better simulating the running state of the assist system in the actual driving steering process. However, in the technical solution, the servo motor can only be connected to the steering column in a fixed straight line, which requires a higher orientation of the steering column and brings inconvenience to the fixed installation of the steering system. In addition, due to the structural differences between different brands of steering systems, the above detection bench cannot well adapt to these differentiated structures, resulting in insufficient flexibility in use. SUMMARY

[0004] In order to solve the above problems, the present application provides a noise test bench for a steering system, which can simulate and test the running steering of a vehicle to detect the noise condition of the steering assist system, and its structure is flexible and can be applied to various types of steering systems.

[0005] In order to achieve the above purpose, the present application provides the following technical solutions:

[0006] The application discloses a noise test bench for a steering assist system, which comprises a base, a steering gear fixing mechanism and a column driving mechanism; the column driving mechanism comprises a first base, a first lifting assembly and a driving assembly; the driving assembly comprises a first mounting block, a first rotating piece and a steering motor; the first mounting block is in transmission connection with the first lifting assembly and can move in the z direction; the first rotating piece comprises a first part fixedly connected with the first mounting block and a second part fixedly connected with the steering motor; the first part and the second part can rotate relative to each other; and the steering motor is provided with a connecting end.

[0007] The column driving mechanism of the application is provided with a lifting assembly and a driving assembly; the lifting assembly can drive the driving assembly to move in the z direction, so that the height position of the driving assembly is adjusted to correspond to the end position of the steering column; the driving assembly is connected with the first base block through the rotating piece; the rotating piece enables the driving assembly to rotate along a plane; during the rotating process, the connecting end of the steering motor can change the angle thereof, so as to correspond to the orientation of the steering column, and the steering column is smoothly connected with the connecting end; compared with the prior art, the application can be connected with the steering column from multiple directions and angles, the installation and fixation of the steering system assembly are more convenient, and the application can be applied to various types of steering systems.

[0008] Further, the upper side of the base is provided with a first mounting guide rail extending in the x direction; the first base is in sliding fit with the first mounting guide rail.

[0009] Further, the first base comprises a first bottom plate and a first mounting frame; the first bottom plate is in sliding fit with the first mounting guide rail; the upper side of the first bottom plate is provided with a first adjusting guide rail extending in the y direction; and the first mounting frame is in sliding fit with the first adjusting guide rail.

[0010] Further, the first base further comprises a sliding seat in sliding fit with the first adjusting guide rail and a second rotating piece rotatable along the x-y plane; the upper and lower sides of the second rotating piece are connected with the first mounting frame and the sliding seat respectively.

[0011] Further, the noise test bench further comprises a column fixing mechanism; the column fixing mechanism comprises a second base, a second lifting assembly and a fixing assembly; the fixing assembly comprises a second mounting block and a mounting base plate; the second mounting block is in transmission connection with the second lifting assembly and can move in the z direction; and the mounting base plate is connected with the second mounting block; and the second base is in sliding fit with the first mounting guide rail.

[0012] Further, the fixing assembly further comprises a third rotating piece; the two sides of the third rotating piece are connected with the second mounting block and the mounting base plate respectively.

[0013] Further, the second base comprises a second bottom plate and a second mounting frame, the second bottom plate is in sliding fit with the first mounting rail, and a second adjusting rail extending in the y direction is arranged on the upper side of the second bottom plate, and the second mounting frame is in sliding fit with the second adjusting rail.

[0014] Further, the fixing table comprises a lower mounting plate, an upper mounting plate and a support connecting piece, the lower mounting plate is fixedly connected with the base, a first guide part extending in the y direction is arranged on the upper side of the lower mounting plate, and the upper end of the support connecting piece is fixedly connected with the upper mounting plate, and the lower end is provided with a first matching part corresponding to the first guide part.

[0015] Further, the fixing table further comprises two fine adjustment mounting pieces, the fine adjustment mounting piece comprises an adjusting block and a fixed base piece, a second guide part extending in the x direction is arranged on the upper side of the fixing table, the adjusting block is provided with a second matching part corresponding to the second guide part, a third guide part extending in the y direction is arranged on the upper side of the adjusting block, and the fixed base piece is provided with a third matching part corresponding to the third guide part, and the fixed base piece is provided with a fixed base hole opening upward.

[0016] Further, the two sides of the fixing table are provided with second mounting rails, and the mounting seat is in sliding fit with the third mounting rail.

[0017] The application can achieve the following beneficial effects:

[0018] 1. The pipe column driving mechanism is provided with a lifting assembly and a driving assembly, the lifting assembly can drive the driving assembly to move in the z direction, so as to adjust the height position of the driving assembly, so that it corresponds to the end position of the steering column, the driving assembly is connected with the first base block through a rotating piece, the rotating piece enables the driving assembly to rotate in a plane, and the connecting end head of the steering motor can change its angle during the rotating process, so as to correspond to the orientation of the steering column, so that the steering column and the connecting end head are successfully connected, compared with the prior art, the application can be connected with the steering column from multiple directions and angles, so that the installation and fixation of the steering system assembly are more convenient, and the application can be applied to various types of steering systems.

[0019] 2. In some embodiments of the application, the pipe column driving mechanism is matched with the first mounting rail and is fixed with the base through a screw, the pipe column driving mechanism can be translated in the x direction after the screw is removed, so as to facilitate the alignment with the steering column, in a further embodiment, the mounting frame of the first base is matched with the adjusting rail extending in the y direction on the upper side of the first bottom plate, so that the first base can be translated in the y direction, which further facilitates the position adjustment of the connecting end head in the x-y plane, and in a further embodiment, the first base is further provided with a second rotating piece which can rotate in the x-y plane, so that the angle adjustment range of the connecting end head is further expanded, so as to meet the connection requirements in most cases.

[0020] 3、Some embodiments of the present application are also provided with a steering column fixing mechanism, which can assist the connection of the end head and the steering column, and also provide installation and positioning for the steering column in the subsequent abnormal sound test, to facilitate the steering operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of the abnormal sound test bench for the steering assist system in the embodiment;

[0022] Figure 2 Structure diagram of the fixed bench;

[0023] Figure 3 Structure diagram of the steering column driving mechanism;

[0024] Figure 4 Structure diagram of the steering column fixing mechanism;

[0025] In the figure, 1 is a base, 11 is a first installation guide rail, 12 is a second installation guide rail, 2 is a steering gear fixing mechanism, 21 is a fixed bench, 211 is a lower installation plate, 212 is an upper installation plate, 213 is a support connecting piece, 214 is an adjusting block, 215 is a fixed base piece, 2151 is a fixed base hole, 22 is a locking assembly, 221 is a mounting seat, 222 is a locking end head, 3 is a steering column driving mechanism, 31 is a first base, 311 is a first bottom plate, 3111 is a first adjusting guide rail, 312 is a first mounting frame, 313 is a second rotating piece, 314 is a sliding seat, 32 is a first lifting assembly, 321 is a first lifting motor, 322 is a first lifting guide rail, 33 is a driving assembly, 331 is a first mounting block, 332 is a first rotating piece, 333 is a steering motor, 4 is a steering column fixing mechanism, 41 is a second base, 411 is a second bottom plate, 4111 is a second adjusting guide rail, 412 is a second mounting frame, 42 is a second lifting assembly, 421 is a second lifting motor, 422 is a second lifting guide rail, 43 is a fixing assembly, 431 is a second mounting block, 432 is a mounting base plate, 433 is a third rotating piece. DETAILED DESCRIPTION

[0026] The technical solutions of the present application will be described clearly and completely below in combination with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. EMBODIMENT

[0027] The embodiments of the first aspect of the present application provide an abnormal sound test bench for a steering assist system, which is described with reference to Figures 1-4The device comprises a base 1, a steering gear fixing mechanism 2 and a column driving mechanism 3, the steering gear fixing mechanism and the column driving mechanism are connected with the upper side of the base, and the column driving mechanism is arranged at the y-direction side of the steering gear fixing mechanism; the steering gear fixing mechanism 2 comprises a fixing table 21 for placing and fixing the steering gear and two locking assemblies 22 for abutting and fixing the steering pull rod at the end of the steering gear, the locking assemblies are arranged at the two ends of the fixing table in the x-direction, and each locking assembly comprises a mounting seat 221 connected with the base and a locking device connected with the mounting seat, the locking device has a locking end head 222 movable in the x-direction; the column driving mechanism comprises a first base 31, a first lifting assembly 32 and a driving assembly 33, the lower end of the first base 31 is connected with the base, the first lifting assembly 32 comprises a first lifting motor 321 and a first lifting guide rail 322, the first lifting guide rail is arranged in the z-direction, and the first lifting motor can exert a driving force in the z-direction, the driving assembly 33 comprises a first mounting block 331, a first rotating part 332 and a steering motor 333, the first mounting block 331 is in sliding fit with the first lifting guide rail and is in transmission connection with the first lifting motor, so that the first mounting block can move in the z-direction under the control of the first lifting motor, the first rotating part comprises a first part and a second part in movable fit with each other, the first part and the second part can rotate relative to each other, the first part and the second part of the first rotating part are fixedly connected with the first mounting block and the steering motor respectively, so that the steering motor can rotate relative to the first mounting block, and the steering motor is connected with a butt joint 334 for butt joint with the steering column, and the butt joint can change the angle of the butt joint relative to the base with the rotation of the first rotating part.

[0028] The working principle of the embodiment is as follows: first, the steering gear of the steering system assembly is fixedly connected with the fixing table 21, and the two locking assemblies 22 are abutted and fixed with the steering pull rod at the end of the steering gear, then the column driving mechanism is adjusted, the butt joint 334 is fixedly connected with the end of the steering column extended from the middle of the steering gear, that is, the installation and fixation of the steering system assembly are completed, after the fixation is completed, the operation of the steering motor is controlled, the rotation of the steering pull rod is driven, and then the instruction is applied to the steering gear through the power assisting mechanism, so that the operation mode of the steering system assembly in the actual operation of the vehicle is simulated, different steering situations of the vehicle can be simulated by changing the operation mode of the steering motor, and the abnormal sound detection is realized.

[0029] In a further embodiment, the upper side 1 of the base is provided with a first mounting guide rail 11, and the lower end of the first base 31 is in sliding fit with the first mounting guide rail, so that the column driving mechanism can change the installation position thereof in the x-direction, so as to better connect with the steering column.

[0030] In a further embodiment, with reference to Figure 3The first base is composed of a first bottom plate 311, a first mounting frame 312, a second rotating piece 313 and a sliding seat 314. The first bottom plate is in sliding fit with the first mounting rail. The upper side of the first bottom plate is provided with a first adjusting rail 3111. The sliding seat is in sliding fit with the first adjusting rail, so that the sliding seat can change its mounting position in the y direction. The upper and lower sides of the second rotating piece are connected with the first mounting frame and the sliding seat respectively. The first mounting frame can rotate relative to the sliding seat, so as to change the orientation of the adapter, thereby greatly widening the angle adjusting range of the adapter and meeting the connection requirement of the steering column as much as possible.

[0031] In further embodiments, with reference to Figure 2 The fixed table comprises a lower mounting plate 211, an upper mounting plate 212, a support connecting piece 213, two adjusting blocks 214 and two fixed base pieces 215. The lower mounting plate 211 is fixedly connected with the base. The upper side of the lower mounting plate forms a first guide part extending in the y direction. The lower end of the support connecting piece forms a first matching part corresponding to the first guide part. The upper and lower ends of the support connecting piece are connected with the upper mounting plate and the lower mounting plate respectively. The upper side of the upper mounting plate forms a second guide part extending in the x direction. The lower side of the adjusting block forms a second matching part corresponding to the second guide part, and the upper side forms a third guide part extending in the y direction. The lower side of the adjusting block is connected with the upper mounting plate. The lower end of the fixed base piece forms a third matching part corresponding to the third guide part, and the upper end forms a fixed base hole 2151 opening in the z direction. The lower end of the fixed base piece is connected with the adjusting block. The steering gear usually has some connecting holes for screw fixation. The steering gear can be fixedly connected with the fixed base piece through the matching of the fixed base hole. Since the multiple guide matching structures are arranged in the embodiment, the two fixed base pieces can easily find the corresponding connecting holes of the steering gear, so as to realize the fixed connection of the steering gear.

[0032] In further embodiments, the base further comprises a second mounting rail 12 arranged at the positions of the x direction ends of the fixed table. The locking assembly is in sliding fit with the second mounting rail through the mounting seat, so that the locking assembly can change its mounting position in the x direction, so as to solve the problem that the stroke upper limit of the locking end 222 is insufficient to be fixedly abutted with the steering tie rod in some cases.

[0033] In order to ensure the normal operation of the steering assembly system, in further embodiments, with reference to Figure 1 and Figure 4, the abnormal sound test bench further comprises a pipe column fixing mechanism 4, the pipe column fixing mechanism comprises a second base 41, a second lifting assembly 42 and a fixing assembly 43, the second base comprises a second bottom plate 411 and a second mounting frame 412, the second bottom plate is in sliding fit with the first mounting rail, the upper side of the second bottom plate forms a second adjusting rail 4111 extending in the y direction, the lower end of the second mounting frame is in movable fit with the second adjusting rail, so that the fixing assembly can be adjusted in position in the y direction, the second lifting mechanism comprises a second lifting motor and a second lifting rail, the fixing assembly comprises a second mounting block 431, a mounting base plate 432 and a third rotating piece 433, the second mounting block is in sliding connection with the second lifting rail and can be lifted in the z direction under the drive of the second lifting motor, the two sides of the third rotating piece are fixedly connected with the second mounting block and the mounting base plate respectively, so that the mounting base plate can be rotated relative to the second mounting block, so as to find a suitable angle to fix the steering column.

[0034] In some other embodiments, the first lifting mechanism 321 and the second lifting mechanism 421 can also adopt other mechanical structures with lifting function, for example, a z-directional lead screw can be arranged, the first mounting block or the second mounting block is connected with the lead screw, and when the lifting motor drives the lead screw to rotate, the first mounting block or the second mounting block can move up and down along the lead screw, so as to realize the lifting function.

[0035] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced, any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A rattle test bench for a steering assist system, characterized by: The base, the steering fixed mechanism and the pipe column driving mechanism, the pipe column driving mechanism includes the first base, the first lifting assembly and the driving assembly, the driving assembly includes the first mounting block, the first rotating piece and the steering motor, the first mounting block is transmission connection with the first lifting assembly and can be translated in z direction, the first rotating piece includes the first part fixedly connected with the first mounting block and the second part fixedly connected with the steering motor, the first part and the second part can be relatively rotated, the steering motor is equipped with the connecting end, the steering fixed mechanism includes the fixed table and the two locking assemblies arranged in the x direction both ends of the fixed table, the locking assembly includes the mounting seat and the locking device connected with the mounting seat, the locking device has the locking end head that can move in x direction, the first base includes the first bottom plate and the first mounting frame, the first bottom plate is in sliding fit with the first mounting guide rail, the first bottom plate upper side is equipped with the first adjusting guide rail extending in y direction, the first mounting frame is in sliding fit with the first adjusting guide rail, the first base further includes the sliding seat in sliding fit with the first adjusting guide rail and the second rotating piece rotatable along x-y plane, the second rotating piece's upper and lower sides are with the first mounting frame and the sliding seat respectively, further include the pipe column fixed mechanism, the pipe column fixed mechanism includes the second base, the second lifting assembly and the fixed assembly, the fixed assembly includes the second mounting block and the mounting base plate, the second mounting block is transmission connection with the second lifting assembly and can be translated in z direction, the mounting base plate is connected with the second mounting block, the second base is in sliding fit with the first mounting guide rail.

2. The abnormal noise test bench for a steering assist system according to claim 1, characterized in that: The first mounting guide rail extending in x direction is arranged on the upper side of the base, and the first base is in sliding fit with the first mounting guide rail.

3. The abnormal noise test bench for a steering assist system according to claim 2, characterized in that: The fixed assembly further includes the third rotating piece, and the two sides of the third rotating piece are connected with the second mounting block and the mounting base plate respectively.

4. The abnormal noise test bench for a steering assist system according to claim 2, characterized in that: The second base includes the second bottom plate and the second mounting frame, the second bottom plate is in sliding fit with the first mounting guide rail, the upper side of the second bottom plate is equipped with the second adjusting guide rail extending in y direction, and the second mounting frame is in sliding fit with the second adjusting guide rail.

5. The abnormal noise test bench for a steering assist system according to claim 1, characterized in that: The fixed table includes the lower mounting plate, the upper mounting plate and the support connecting piece, the lower mounting plate is fixedly connected with the base, and the upper side of the lower mounting plate is provided with the first guide part extending in y direction, the upper end of the support connecting piece is fixedly connected with the upper mounting plate, and the lower end is provided with the first matching part corresponding to the first guide part.

6. The abnormal noise test bench for a steering assist system according to claim 5, characterized in that: The fixed table further includes two fine adjustment mounting pieces, the fine adjustment mounting piece includes the adjusting block and the fixed base piece, the upper side of the fixed table is provided with the second guide part extending in x direction, and the adjusting block is provided with the second matching part corresponding to the second guide part, the upper side of the adjusting block is provided with the third guide part extending in y direction, and the fixed base piece is provided with the third matching part corresponding to the third guide part, and the fixed base piece is provided with the fixed base hole opening upward.

7. The abnormal noise test bench for a steering assist system according to claim 2, characterized in that: The second mounting guide rail is arranged on the two sides of the fixed table, and the mounting seat is in sliding fit with the third mounting guide rail.

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