Abnormal sound test bench for power-assisted steering system

Abstract

The invention provides an abnormal sound test bench for a power-assisted steering system. The abnormal sound test bench comprises a base, a steering gear fixing mechanism and a tubular column driving mechanism, the tubular column driving mechanism comprises a first base part, 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 x-direction ends of the fixing table, each locking assembly comprises a mounting base and a locking device connected with the mounting base, and each locking device is provided with a locking end capable of moving in the x direction. The tubular column driving mechanism is provided with the lifting assembly and the driving assembly, the height position angle of the driving assembly can be adjusted, the tubular column driving mechanism is connected with the steering tubular column from multiple directions and angles, a steering system assembly is more convenient to install and fix, and the tubular column driving mechanism can be suitable for various different types of steering systems.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle detection, and in particular to an abnormal noise test bench for a power steering system. Background Art

[0002] Vehicle abnormal noise is widely regarded as one of the important factors affecting vehicle comfort. In particular, as the market share of electric vehicles increases significantly year by year, their background noise is greatly reduced compared to fuel vehicles. At this time, abnormal noise during vehicle operation is easier to perceive. The steering system is a chassis system component that directly provides dynamic feedback to the driver and passengers, and its noise level is extremely important.

[0003] The assembly structure of the steering system includes a steering gear, a steering rod connected to both ends of the steering gear, and a steering column connected to the middle of the steering rod through a power-assist system. In the vehicle structure, the steering rod is connected to the vehicle's steering mechanism, and the steering column is connected to the steering wheel. During the steering process, the steering command applied by the steering wheel acts on the power-assist system through the steering column, and the operation of the steering rod is controlled by the power-assist system. The entire steering process involves the movement of multiple components, so abnormal noises are common. For the power-assist system, the general detection method is to directly detect abnormal noises during its power-on operation, which cannot fully simulate the actual working state of the power-assist system. The patent document with application number CN201510954467.4 discloses an electric power steering column noise detection platform, which is connected to the steering column through a servo motor with a rotating shaft. The servo motor drives the steering column to rotate, simulating the steering operation in the process, thereby better simulating the operating state of the power assistance system in the actual driving steering process. However, in this technical solution, the servo motor can only be connected to the steering column on a fixed straight path, which makes the orientation requirements of the steering column high, brings inconvenience to the fixed installation of the steering system, and because there may be structural differences between steering systems of different brands, the above-mentioned detection platform cannot adapt well to these differentiated structures, which makes its use flexibility insufficient. Summary of the invention

[0004] In order to solve the above problems, the present invention provides an abnormal noise test bench for a steering system, which can simulate the steering operation of a vehicle to detect the abnormal noise condition of the steering power system, and its structure is relatively flexible and can be applied to a variety of different models of steering systems.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A noise test bench for a power steering 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 member and a steering motor, the first mounting block is transmission-connected to the first lifting assembly and can translate in the z direction, the first rotating member comprises a first component fixedly connected to the first mounting block and a second component fixedly connected to the steering motor, the first component and the second component can rotate relative to each other, and the steering motor is provided with a connecting end; the steering gear fixing mechanism comprises a fixing platform and two locking assemblies arranged at both ends of the fixing platform in the x direction, the locking assembly comprises a mounting seat and a locking device connected to the mounting seat, and the locking device has a locking end that can move in the x direction.

[0006] The column driving mechanism of the present invention is provided with a lifting assembly and a driving assembly. The lifting assembly can drive the driving assembly to move in the z direction, thereby adjusting the height position of the driving assembly to correspond to the end position of the steering column. The driving assembly is connected to the first base block through a rotating member. The rotating member enables the driving assembly to rotate along a plane. During the rotation, the connecting end of the steering motor can change its angle to correspond to the orientation of the steering column, so that the steering column and the connecting end can be smoothly docked. Compared with the prior art, the present invention can be connected to the steering column from multiple orientations and angles, making the installation and fixation of the steering system assembly more convenient, and can be applicable to a variety of different types of steering systems.

[0007] Furthermore, a first mounting rail extending in the x direction is provided on the upper side of the base, and the first base is slidably matched with the first mounting rail.

[0008] Furthermore, the first base includes a first bottom plate and a first mounting frame, the first bottom plate is slidably matched with the first mounting guide rail, a first adjustment guide rail extending in the y direction is provided on the upper side of the first bottom plate, and the first mounting frame is slidably matched with the first adjustment guide rail.

[0009] Furthermore, the first base also includes a sliding seat slidably matched with the first adjustment rail and a second rotating member rotatable along the xy plane, and the upper and lower sides of the second rotating member are respectively connected to the first mounting frame and the sliding seat.

[0010] Furthermore, the abnormal sound test bench also includes a pipe column fixing mechanism, which includes a second base, a second lifting assembly and a fixing assembly, and the fixing assembly includes a second mounting block and a mounting base plate, the second mounting block is transmission-connected to the second lifting assembly and can translate in the z direction, and the mounting base plate is connected to the second mounting block; the second base is slidably matched with the first mounting guide rail.

[0011] Furthermore, the fixing assembly also includes a third rotating member, and two sides of the third rotating member are respectively connected to the second mounting block and the mounting base plate.

[0012] Furthermore, the second base includes a second bottom plate and a second mounting frame, the second bottom plate is slidably matched with the first mounting guide rail, a second adjustment guide rail extending in the y direction is provided on the upper side of the second bottom plate, and the second mounting frame is slidably matched with the second adjustment guide rail.

[0013] Furthermore, the fixed platform includes a lower mounting plate, an upper mounting plate and a supporting connecting member, the lower mounting plate is fixedly connected to the base, the upper side of the lower mounting plate is provided with a first guide portion extending in the y direction, the upper end of the supporting connecting member is fixedly connected to the upper mounting plate, and the lower end is provided with a first matching portion corresponding to the first guide portion.

[0014] Furthermore, the fixed platform also includes two fine-tuning mounting parts, and the fine-tuning mounting parts include an adjustment block and a fixed base member. The upper side of the fixed platform is provided with a second guide portion extending in the x direction, and the adjustment block is provided with a second matching portion corresponding to the second guide portion; the upper side of the adjustment block is provided with a third guide portion extending in the y direction, and the fixed base member is provided with a third matching portion corresponding to the third guide portion; the fixed base member is provided with a fixed base hole opening upward.

[0015] Furthermore, second mounting rails are provided on both sides of the fixing platform, and the mounting seat is slidably matched with third mounting rails.

[0016] The application of the present invention can achieve the following beneficial effects: 1. The column driving mechanism of the present invention is provided with a lifting assembly and a driving assembly. The lifting assembly can drive the driving assembly to move in the z direction, thereby adjusting the height position of the driving assembly to correspond to the end position of the steering column. The driving assembly is connected to the first base block through a rotating member. The rotating member enables the driving assembly to rotate along a plane. During the rotation, the connecting end of the steering motor can change its angle to correspond to the orientation of the steering column, so that the steering column and the connecting end can be smoothly docked. Compared with the prior art, the present invention can be connected to the steering column from multiple directions and angles, making the installation and fixation of the steering system assembly more convenient, and can be applicable to a variety of different types of steering systems.

[0017] 2. In some embodiments of the present invention, the column drive mechanism cooperates with the first mounting rail and is fixed to the base by screws. After the screws are removed, the column drive mechanism can translate along the x-direction to facilitate alignment with the steering column. In a further embodiment, the mounting frame of the first base cooperates with the adjustment rail arranged in the y-direction on the upper side of the first bottom plate, so that the first base can translate along the y-direction, further facilitating the position adjustment of the connecting end in the xy plane. In a further embodiment, the first base is also provided with a second rotating member that can rotate along the xy plane, so that the docking end further expands the angle adjustment range, thereby meeting the docking requirements in most cases.

[0018] 3. In some embodiments of the present invention, a column fixing mechanism is also provided, which can assist in the docking of the connecting end with the steering column, and also provide installation positioning for the steering column in subsequent abnormal noise tests to facilitate steering operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the abnormal noise test bench for the power steering system in the embodiment; Figure 2 It is a structural schematic diagram of the fixed platform; Figure 3 is a structural schematic diagram of a pipe string driving mechanism; Figure 4 is a structural schematic diagram of a pipe string fixing mechanism; In the figure, 1-base, 11-first mounting rail, 12-second mounting rail, 2-steering gear fixing mechanism, 21-fixed platform, 211-lower mounting plate, 212-upper mounting plate, 213-support connecting member, 214-adjusting block, 215-fixed base member, 2151-fixed base hole, 22-locking assembly, 221-mounting seat, 222-locking end, 3-pipe column driving mechanism, 31-first base, 311-first bottom plate, 3111-first adjusting rail, 312-first mounting frame, 313-second rotating member, 314-sliding Moving seat, 32-first lifting assembly, 321-first lifting motor, 322-first lifting guide rail, 33-driving assembly, 331-first mounting block, 332-first rotating member, 333-steering motor, 4-pipe column fixing mechanism, 41-second base, 411-second bottom plate, 4111-second adjusting guide rail, 412-second mounting frame, 42-second lifting assembly, 421-second lifting motor, 422-second lifting guide rail, 43-fixing assembly, 431-second mounting block, 432-mounting substrate, 433-third rotating member. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. 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. Example

[0021] The embodiment of the first aspect of the present invention provides an abnormal noise test bench for a power steering system, referring to Figures 1 to 4, which includes 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 both connected to the upper side of the base, and the column driving mechanism is arranged on the y-direction side of the steering gear fixing mechanism; the steering gear fixing mechanism 2 includes a fixing platform 21 for placing and fixing the steering gear and two locking components 22 for abutting and fixing the steering rod at the end of the steering gear, the locking components are arranged at both ends of the fixing platform in the x-direction, the locking components include a mounting seat 221 connected to the base and a locking device connected to the mounting seat, the locking device has a locking end 222 that can move along the x-direction; the column driving mechanism includes a first base 31, a first lifting component 32 and a driving component 33, the lower end of the first base 31 is connected to the base, the first lifting component 32 includes a first lifting motor 321 and a first lifting guide Rail 322, the first lifting guide rail is arranged in z direction, the first lifting motor can apply z direction driving force, the driving assembly 33 includes a first mounting block 331, a first rotating member 332 and a steering motor 333, the first mounting block 331 is slidably matched with the first lifting guide rail and is transmission connected with the first lifting motor, so that the first mounting block can move in z direction under the control of the first lifting motor, the first rotating member includes a first component and a second component that are movably matched with each other, the first component and the second component can rotate relative to each other, the first component and the second component of the first rotating member 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 docking joint 334 for docking with the steering column, and the docking joint can change its angle relative to the base as the first rotating member rotates.

[0022] The working principle of this embodiment is as follows: first, the steering gear of the steering system assembly is fixedly connected to the fixed platform 21, and fixed to the steering rod at the end of the steering gear through two locking components 22, and then the column driving mechanism is adjusted to fix the docking joint 334 to the end of the steering column extending from the middle of the steering gear, thus completing the installation and fixation of the steering system assembly. After the fixation is completed, the rotation of the steering rod can be driven by controlling the operation of the steering motor, and then the steering gear is given instructions through the power-assisting mechanism, thereby simulating the operation mode of the steering system assembly under actual vehicle operation. By changing the operation mode of the steering motor, different steering situations of the vehicle can be simulated, thereby realizing abnormal noise detection.

[0023] In a further embodiment, the upper side surface 1 of the base is provided with a first mounting rail 11, and the lower end of the first base 31 is slidably matched with the first mounting rail, so that the column drive mechanism can change its installation position along the x direction to better connect with the steering column.

[0024] In a further embodiment, reference Figure 3The first base is composed of a first bottom plate 311, a first mounting frame 312, a second rotating member 313, and a sliding seat 314. The first bottom plate is slidably matched with the first mounting guide rail. The upper side of the first bottom plate is provided with a first adjustment guide rail 3111. The sliding seat is slidably matched with the first adjustment guide rail, so that the sliding seat can change its own installation position in the y direction. The upper and lower sides of the second rotating member are respectively connected to the first mounting frame and the sliding seat. The first mounting frame can rotate relative to the sliding seat, thereby changing the orientation of the docking joint, thereby greatly widening the angle adjustment range of the docking joint to meet the connection requirements of the steering column as much as possible.

[0025] In a further embodiment, reference Figure 2 The fixed platform includes a lower mounting plate 211, an upper mounting plate 212, a supporting connector 213, two adjusting blocks 214 and two fixed base members 215. The lower mounting plate 211 is fixedly connected to the base. The upper side of the lower mounting plate forms a first guide portion extending in the y direction. The lower end of the supporting connector forms a first matching portion corresponding to the first guide portion. The upper and lower ends of the supporting connector are respectively connected to the upper mounting plate and the lower mounting plate. The upper side of the upper mounting plate forms a second guide portion extending in the x direction. The lower side of the adjusting block forms a second matching portion corresponding to the second guide portion. The lower side of the adjusting block is connected to the upper mounting plate, the lower end of the fixed base component forms a third matching portion corresponding to the third guide portion, and the upper end forms a fixed base hole 2151 opening in the z direction, the lower end of the fixed base component is connected to the adjusting block, the steering gear usually has some connecting holes for screw fixing, and the steering gear can be fixedly connected to the fixed base component by matching with the fixed base holes. Since a multiple guide matching structure is provided in this embodiment, the two fixed base components can easily find the corresponding connecting holes of the steering gear to realize the fixed connection of the steering gear.

[0026] In a further embodiment, the base also includes a second mounting rail 12 arranged at both ends of the fixed platform in the x direction, and the locking assembly slides with the second mounting rail through a mounting seat, so that the locking assembly can change its own installation position along the x direction to solve the problem that the upper limit of the travel of the locking end 222 is not sufficient to fix and abut with the steering rod in some cases.

[0027] In order to ensure the normal operation of the steering assembly system, in a further embodiment, reference is made to Figure 1 and Figure 4The abnormal noise test bench also includes a column fixing mechanism 4, which includes a second base 41, a second lifting assembly 42 and a fixing assembly 43. The second base includes a second bottom plate 411 and a second mounting bracket 412. The second bottom plate slidably cooperates with the first mounting guide rail. The upper side of the second bottom plate forms a second adjustment guide rail 4111 extending in the y direction. The lower end of the second mounting bracket movably cooperates with the second adjustment guide rail so that the fixing assembly can adjust its position in the y direction. The second lifting mechanism includes a second lifting motor and a second lifting guide rail. The fixing assembly includes a second mounting block 431, a mounting base plate 432 and a third rotating member 433. The second mounting block is slidably connected to the second lifting guide rail and can be lifted and lowered in the z direction under the drive of the second lifting motor. The two sides of the third rotating member are respectively fixedly connected to the second mounting block and the mounting base plate, so that the mounting base plate can rotate relative to the second mounting block, so as to find a suitable angle to fix the steering column.

[0028] In some other embodiments, the first lifting mechanism 321 and the second lifting mechanism 421 may also adopt other mechanical structures that also have the lifting function. For example, a z-axis screw rod may be provided to connect the first mounting block or the second mounting block to the screw rod. When the lifting motor drives the screw rod to rotate, the first mounting block or the second mounting block can move up and down along the screw rod to realize the lifting function.

[0029] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An abnormal noise test bench for a power steering system, characterized in that: It includes a base, a steering gear fixing mechanism and a column driving mechanism; the column driving mechanism includes a first base, a first lifting assembly and a driving assembly, the driving assembly includes a first mounting block, a first rotating member and a steering motor, the first mounting block is transmission-connected to the first lifting assembly and can translate in the z direction, the first rotating member includes a first component fixedly connected to the first mounting block and a second component fixedly connected to the steering motor, the first component and the second component can rotate relative to each other, and the steering motor is provided with a connecting end; the steering gear fixing mechanism includes a fixed platform and two locking assemblies arranged at both ends of the fixed platform in the x direction, the locking assembly includes a mounting seat and a locking device connected to the mounting seat, and the locking device has a locking end that can move in the x direction.

2. The abnormal noise test bench for a power steering system according to claim 1, characterized in that: A first mounting guide rail extending in the x direction is disposed on the upper side of the base, and the first base portion is slidably matched with the first mounting guide rail.

3. The abnormal noise test bench for a power steering system according to claim 1, characterized in that: The first base comprises a first bottom plate and a first mounting frame, the first bottom plate is slidably matched with a first mounting guide rail, a first adjustment guide rail extending in the y direction is provided on the upper side of the first bottom plate, and the first mounting frame is slidably matched with the first adjustment guide rail.

4. The abnormal noise test bench for a power steering system according to claim 3, characterized in that: The first base also includes a sliding seat slidably matched with the first adjustment guide rail and a second rotating member rotatable along the xy plane, and the upper and lower sides of the second rotating member are respectively connected to the first mounting frame and the sliding seat.

5. The abnormal noise test bench for a power steering system according to claim 2, characterized in that: It also includes a pipe column fixing mechanism, which includes a second base, a second lifting assembly and a fixing assembly. The fixing assembly includes a second mounting block and a mounting base plate. The second mounting block is transmission-connected to the second lifting assembly and can translate in the z direction. The mounting base plate is connected to the second mounting block. The second base is slidably matched with the first mounting guide rail.

6. The abnormal noise test bench for a power steering system according to claim 5, characterized in that: The fixing assembly further comprises a third rotating member, two sides of which are respectively connected to the second mounting block and the mounting base plate.

7. The abnormal noise test bench for a power steering system according to claim 5, characterized in that: The second base includes a second bottom plate and a second mounting frame, the second bottom plate is slidably matched with the first mounting guide rail, a second adjustment guide rail extending in the y direction is provided on the upper side of the second bottom plate, and the second mounting frame is slidably matched with the second adjustment guide rail.

8. The abnormal noise test bench for power steering system according to claim 1, characterized in that: The fixed platform includes a lower mounting plate, an upper mounting plate and a supporting connecting member, the lower mounting plate is fixedly connected to the base, the upper side of the lower mounting plate is provided with a first guide portion extending in the y direction, the upper end of the supporting connecting member is fixedly connected to the upper mounting plate, and the lower end is provided with a first matching portion corresponding to the first guide portion.

9. The abnormal noise test bench for power steering system according to claim 8, characterized in that: The fixed platform also includes two fine-tuning mounting parts, and the fine-tuning mounting parts include an adjustment block and a fixed base member. The upper side of the fixed platform is provided with a second guide portion extending in the x direction, and the adjustment block is provided with a second matching portion corresponding to the second guide portion; the upper side of the adjustment block is provided with a third guide portion extending in the y direction, and the fixed base member is provided with a third matching portion corresponding to the third guide portion; the fixed base member is provided with a fixed base hole opening upward.

10. The abnormal noise test bench for power steering system according to claim 2, characterized in that: The second mounting rails are arranged on both sides of the fixing platform, and the mounting seat is slidably matched with the third mounting rails.

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