Modal test bench and modal test device

Abstract

The application discloses a modal test bench and a modal test device. The modal test bench is used for modal test of a multi-working-condition steering system. The steering system comprises a mounting seat, a steering shaft connected with the mounting seat, and a universal joint arranged at the lower end of the steering shaft. The modal test bench comprises a mounting frame and an adjusting assembly. The adjusting assembly comprises a first adjusting part and a second adjusting part which are arranged in intervals from top to bottom. The first adjusting part and the second adjusting part are both slidably mounted on the mounting frame in the up-down direction, and the first adjusting part is rotatably mounted on the mounting frame in the left-right direction. The first adjusting part is used for being connected with the mounting seat, and the second adjusting part is used for being hingedly connected with the universal joint. Since the distance between the first adjusting part and the second adjusting part is adjustable, and the first adjusting part can rotate, the modal test bench can be used for fixing steering systems with different lengths and different angles between the mounting seat and the steering shaft, the universality is improved, the cost is reduced, and the operation is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile, in particular to a modal test bench and a modal test device. BACKGROUND

[0002] The steering system of the automobile mainly focuses on the inherent frequency of the front and rear swing and the left and right swing to improve the idle vibration of the steering system, and the idle frequency often has an important relationship with the first-order inherent frequency of the steering column. Therefore, after the early design sample is completed, the modal test needs to be performed on the steering system to verify whether the steering meets the standard. When performing the modal test, the steering system is usually fixed by a test bench. The universality of the existing modal test bench is low, and it can usually only be fixed for one kind of steering system. SUMMARY

[0003] The main purpose of the present application is to provide a modal test bench and a modal test device, which aims to improve the universality of the modal test bench.

[0004] To achieve the above purpose, the modal test bench provided by the present application is used for the modal test of the steering system under multiple working conditions. The steering system includes a mounting seat, a steering shaft connected with the mounting seat, and a universal joint arranged at the lower end of the steering shaft. The modal test bench includes:

[0005] a mounting frame; and

[0006] an adjusting assembly including a first adjusting part and a second adjusting part arranged in a spaced manner from top to bottom. The first adjusting part and the second adjusting part are both slidably installed on the mounting frame in the up-down direction, and the first adjusting part is rotatably installed on the mounting frame in the left-right direction. The first adjusting part is used to be connected with the mounting seat, and the second adjusting part is used to be hingedly connected with the universal joint.

[0007] Optionally, the mounting frame includes two vertical columns arranged in a spaced manner in the left-right direction. The first adjusting part is arranged in the left-right direction. The two ends of the first adjusting part and the two vertical columns are both provided with a movable structure. The movable structure includes a first slot arranged on the vertical column and extending in the up-down direction, and a mounting cylinder arranged on the end of the first adjusting part and matched with the first slot. The mounting cylinder is rotatably installed on the first slot in the up-down direction.

[0008] The middle part of the first adjusting part is further provided with a mounting part, the mounting part comprises a mounting plate, a bearing plate and an adjusting piece, the mounting plate is used for mounting on the middle part of the first adjusting part, the bearing plate is arranged on the side of the mounting plate away from the first adjusting part, and is arranged opposite to and spaced from the mounting plate in the up-down direction, the bearing plate is used for mounting the mounting seat, and the adjusting piece is arranged between the mounting plate and the bearing plate, and is used for adjusting the distance between the mounting plate and the bearing plate.

[0009] Optionally, the adjusting assembly further comprises a first locking mechanism, the first locking mechanism comprises two first locking parts arranged on the mounting cylinder, the two first locking parts are arranged on the two sides of the first strip-shaped hole in the left-right direction respectively, at least one of the two first locking parts is arranged as a first movable locking part, the first movable locking part is movably mounted on the mounting cylinder, so that the distance between the two first locking parts is reduced to clamp the corresponding column or the distance between the two first locking parts is increased to release the corresponding column; and / or,

[0010] The second adjusting part extends in the left-right direction, and sliding structures are arranged between the two ends of the second adjusting part and the columns, the sliding structures comprise second strip-shaped holes arranged on the columns and extending in the up-down direction and sliding parts arranged on the ends of the second adjusting part and matched with the strip-shaped holes, and the sliding parts are slidably mounted in the second strip-shaped holes in the up-down direction; and / or,

[0011] The mounting plate is provided with a through hole, the bearing plate is provided with a first threaded hole corresponding to the through hole, and the adjusting piece comprises a threaded stud, a threaded section of the threaded stud passes through the through hole and the first threaded hole in sequence and is threadedly connected with the first threaded hole.

[0012] Optionally, the side wall surface of the mounting cylinder is provided with external threads, the first movable locking part is arranged in a ring shape, the inner side wall of the first movable locking part is provided with internal threads matched with the external threads, and the first movable locking part is threadedly connected with the mounting cylinder; and / or,

[0013] The second adjusting part comprises an adjusting rod and a connecting piece, the adjusting rod extends in the left-right direction, the two ends of the adjusting rod are connected with the two sliding parts respectively, the connecting piece is arranged at the middle position of the adjusting rod, one end of the connecting piece is connected with the adjusting rod, and the other end of the connecting piece is used for being connected with the universal joint; and / or,

[0014] The sliding part is arranged in a cylindrical shape and can be rotatably mounted in the second strip-shaped hole along its own axis.

[0015] Optionally, the adjusting assembly further comprises a second locking mechanism, the second locking mechanism comprises two second locking parts arranged on the sliding part, the two second locking parts are arranged on the two sides of the second bar-shaped hole along the left-right direction, at least one of the two second locking parts is arranged as a second movable locking part, the second movable locking part is movably arranged on the sliding part, so that the distance between the two second locking parts is reduced to clamp the corresponding column or the distance between the two second locking parts is increased to release the corresponding column.

[0016] Optionally, the side wall surface of the sliding part is provided with external threads;

[0017] The second movable locking part is arranged in a ring shape, and the inner side wall of the second movable locking part is provided with internal threads matched with the external threads, and the second movable locking part is threadedly connected with the sliding part.

[0018] Optionally, the mounting frame further comprises a base, and the base is used for being fixed to a ground to be tested;

[0019] Among the two columns, at least one column is arranged as a movable column, and the movable column is slidably arranged on the base along the left-right direction, so that the distance between the two columns is adjustable.

[0020] Optionally, a guide structure is arranged between the base and the movable column, the guide structure comprises a sliding groove extending along the left-right direction and a boss matched with the sliding groove, one of the sliding groove and the boss is arranged on the base, and the other is arranged on the movable column.

[0021] Optionally, a second threaded hole is formed in the inner wall surface of the sliding groove;

[0022] The modal test bench further comprises a threaded part, the threaded part is inserted into the second threaded hole and is threadedly connected with the second threaded hole, so that the end portion of the threaded part can be moved to abut against the boss.

[0023] To achieve the above-mentioned purpose, the modal test device provided by the application comprises the modal test bench as described above, the modal test bench is used for modal test of multiple working conditions of a steering system, the steering system comprises a mounting seat, a steering shaft connected with the mounting seat, and a universal joint arranged at the lower end of the steering shaft, and the modal test bench comprises:

[0024] a mounting frame; and

[0025] The adjusting assembly comprises a first adjusting part and a second adjusting part arranged in an up-down direction, the first adjusting part and the second adjusting part are slidably installed on the mounting frame in the up-down direction, and the first adjusting part is rotatably installed on the mounting frame in a left-right direction, wherein the first adjusting part is connected with the mounting seat, and the second adjusting part is hingedly connected with the universal joint.

[0026] In the modal test bench, when the modal test of the steering system is needed, the mounting seat is installed on the first adjusting part, and then the second adjusting part is adjusted according to the specific situation of the steering shaft, for example, when the length of the steering shaft is relatively long, the second adjusting part is moved downward, so that the position of the second adjusting part is close to the lower end of the steering shaft, the angle of the universal joint at the lower end of the steering shaft is adjusted, and then the universal joint is connected with the second adjusting part, when the length of the steering shaft is relatively short, the second adjusting part is moved upward, so that the position of the second adjusting part is close to the lower end of the steering shaft, the angle of the universal joint at the lower end of the steering shaft is adjusted, and then the universal joint is connected with the second adjusting part, of course, when the angle of the universal joint cannot be adjusted to make the universal joint align with the second adjusting part, the first adjusting part can be rotated to adjust the angle of the mounting seat, so that the steering system is fixed through the modal test bench, thereby facilitating the subsequent modal test, since the distance between the first adjusting part and the second adjusting part is adjustable, and the first adjusting part can be rotated, the modal test bench can be applied to the fixation of steering systems with different lengths and different angles between the mounting seat and the steering shaft, the universality is improved, the cost is reduced, and the operation is convenient. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0028] Figure 1 The structural schematic diagram of an embodiment of the modal test bench provided by the present application;

[0029] Figure 2 For Figure 1 The front view schematic diagram of the modal test bench;

[0030] Figure 3 For Figure 1 The left view schematic diagram of the modal test bench.

[0031] Explanation of reference numerals:

[0032]

[0033]

[0034] The objectives, functional features and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present application.

[0036] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0037] In addition, if the embodiments of the present application involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes A solution, or B solution, or A and B solutions. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0038] The steering system of the automobile mainly focuses on the inherent frequency of front and rear swings and left and right swings to improve the idle vibration of the steering system, and the idle frequency often has an important relationship with the first-order inherent frequency of the steering column. Therefore, after the early design sample is completed, a modal test needs to be performed on the steering system to verify whether the steering meets the standard. When performing the modal test, the steering system is usually fixed by a test bench, and the universality of the existing modal test bench is low, and the steering system can usually be fixed only for one kind.

[0039] The present application provides a modal test bench and a modal test device, wherein, Figures 1 to 3The structural schematic diagram of the embodiment of the modal test bench provided by the present application.

[0040] Please refer to Figures 1 to 3 , the modal test bench 100 is used for the modal test of the multi-working condition of the steering system, the steering system includes a mounting seat 10, a steering shaft 20 connected with the mounting seat 10, and a universal joint 30 arranged at the lower end of the steering shaft, the modal test bench 100 includes a mounting frame and an adjusting assembly, the adjusting assembly includes a first adjusting part 21 and a second adjusting part 22 arranged in a spaced manner from top to bottom, the first adjusting part 21 and the second adjusting part 22 are both slidably installed on the mounting frame in the up-down direction, and the first adjusting part 21 is rotatably installed on the mounting frame in the left-right direction, wherein the first adjusting part 21 is used for being connected with the mounting seat 10, and the second adjusting part 22 is used for being hingedly connected with the universal joint 30.

[0041] In the above-mentioned modal test bench 100, when the modal test of the steering system is needed, the mounting seat 10 is first installed on the first adjusting part 21, then the second adjusting part 22 is adjusted according to the specific situation of the steering shaft 20, for example, when the length of the steering shaft 20 is relatively long, the first adjusting part and / or the second adjusting part 22 are moved downward, so that the position of the second adjusting part 22 is close to the lower end of the steering shaft 20, the angle of the universal joint 30 at the lower end of the steering shaft 20 is adjusted, and then the universal joint 30 is connected with the second adjusting part 22, when the length of the steering shaft 20 is relatively short, the second adjusting part 22 is moved upward, so that the position of the second adjusting part 22 is close to the lower end of the steering shaft 20, the angle of the universal joint 30 at the lower end of the steering shaft 20 is adjusted, and then the universal joint 30 is connected with the second adjusting part 22, of course, when the angle of the universal joint 30 still cannot be adjusted to make the universal joint 30 align with the second adjusting part 22, the first adjusting part 21 can also be rotated to adjust the angle of the mounting seat 10, so that the steering system is fixed through the modal test bench 100, thereby facilitating the subsequent modal test, since the distance between the first adjusting part 21 and the second adjusting part 22 is adjustable, and the first adjusting part 21 is rotatable, the modal test bench 100 can be applied to the fixation of the steering system with different lengths and different angles between the mounting seat 10 and the steering shaft 20, the universality is improved, the cost is reduced, and the operation is convenient.

[0042] It should be noted that in the same steering system, the steering shaft 20 will stretch and contract during driving along with the bumps of the road surface, and the relative position between the steering system and the steering end of the direction machine and the mounting seat also changes, these changes will affect the modal of the steering system, so the modal test bench 100 is suitable for these changes, thereby facilitating the subsequent modal test to obtain results closer to the actual working condition.

[0043] Specifically, referring to Figure 1 , the mounting frame comprises two upright columns 11 arranged in the left-right direction, the first adjusting part 21 is arranged in the left-right direction, and the two ends of the first adjusting part 21 are provided with movable structures 3 between the two upright columns 11, the movable structure 3 comprises a first slot 31 arranged on the upright column 11 and extending in the up-down direction, and a mounting cylinder 32 arranged on the end of the first adjusting part 21 and matched with the first slot 31, the mounting cylinder 32 is rotatable along its own axis and slidably mounted in the first slot 31 in the up-down direction, so that the first adjusting part 21 can slide in the up-down direction and rotate along the left-right axis through the movable structure 3, thereby achieving the height and angle adjustment of the mounting seat 10, which is simple to operate and has good effect.

[0044] In order to reduce the weight of the modal test bench 100, the upright column 11 is hollow in the up-down direction, which reduces the weight to a certain extent and facilitates the machining of the first slot.

[0045] Further, the adjusting assembly further comprises a first locking mechanism, the first locking mechanism comprises two first locking parts 231 arranged on the mounting cylinder 32, the two first locking parts 231 are arranged on the two sides of the first slot 31 in the left-right direction respectively, at least one of the two first locking parts 231 is arranged as a first movable locking part 231a, the first movable locking part 231a is movably mounted on the mounting cylinder 32, so that the distance between the two first locking parts 231 is reduced to clamp the corresponding upright column 11, the friction between the first locking part 231 and the upright column 11 is increased, the position of the first adjusting part 21 is fixed after the position adjustment, or the distance between the two first locking parts 231 is increased to release the corresponding upright column 11, the friction between the first locking part 231 and the upright column 11 is reduced, the up-down sliding of the first adjusting part 21 or the rotation along the left-right axis is facilitated, and the operation is simple.

[0046] Specifically, the side wall surface of the mounting cylinder 32 is provided with external threads, the first movable locking part 231a is arranged in a ring shape, the inner side wall of the first movable locking part 231a is provided with internal threads matched with the external threads, the first movable locking part 231a is threadedly connected with the mounting cylinder 32, the first movable locking part 231a is moved along the axial direction of the mounting cylinder 32 by screwing the first movable locking part 231a, so that the distance between the two first locking parts 231 is adjustable, the operation is simple, and the self-locking ability is achieved.

[0047] Specifically, referring to Figure 1 The middle part of the first adjusting part 21 is further provided with a mounting part 4, which includes a mounting plate 41, a bearing plate 42, and an adjusting part 43. The mounting plate 41 is used to be mounted on the middle part of the first adjusting part 21. The bearing plate 42 is arranged on the side of the mounting plate 41 away from the first adjusting part 21 and is arranged opposite to and spaced from the mounting plate 41 in the up-down direction. The bearing plate 42 is used to mount the mounting seat 10. The adjusting part 43 is arranged between the mounting plate 41 and the bearing plate 42. The distance between the mounting plate 41 and the bearing plate 42 is adjusted by the adjusting part 43. To some extent, the angle of the mounting seat 10 along the left-right axis can be finely adjusted. In cooperation with the adjustment of the angle of the mounting seat 10 by rotating the first adjusting part 21, the angle adjustment is accurate and the effect is good.

[0048] The type of the adjusting part 43 for adjusting the distance between the mounting plate 41 and the bearing plate 42 is various, for example, the adjusting part 43 can be a pneumatic cylinder, a hydraulic cylinder, a ball screw, an electric push rod, etc. Specifically, in the embodiment of the present application, a through hole is arranged on the mounting plate 41. A first threaded hole is arranged on the bearing plate 42 corresponding to the through hole. The adjusting part 43 includes a threaded section of a stud. The threaded section of the stud passes through the through hole and the first threaded hole in sequence and is threadedly connected with the first threaded hole. By rotating the stud, the bearing plate 42 is driven to approach or move away from the mounting plate 41. The structure is simple and the effect is good.

[0049] Specifically, the second adjusting part 22 is arranged to extend in the left-right direction. A sliding structure 5 is arranged between the two ends of the second adjusting part 22 and the stand column 11. The sliding structure 5 includes a second strip-shaped hole 51 arranged on the stand column 11 and extending in the up-down direction and a sliding part 52 arranged on the end of the second adjusting part 22 and matched with the second strip-shaped hole 51. The sliding part 52 can be slidably arranged in the second strip-shaped hole 51 in the up-down direction. In this way, the second adjusting part 22 can approach or move away from the first adjusting part 21 in the up-down direction through the sliding structure 5. The structure is simple and easy to operate.

[0050] Specifically, the second adjusting part 22 includes an adjusting rod 221 and a connecting part 222. The adjusting rod 221 is arranged to extend in the left-right direction. The two ends of the adjusting rod 221 are respectively connected with two sliding parts 52. The connecting part 222 is arranged at the middle position of the adjusting rod 221. One end of the connecting part 222 is connected with the adjusting rod 221. The other end of the connecting part 222 is connected with the universal joint 30, thereby fixing the lower end of the steering shaft 20. The structure is simple and easy to install.

[0051] It should be noted that the connection between the connecting piece 222 and the adjusting rod 221 can be achieved in various ways, such as welding, hinging, clamping, etc., and the connection between the connecting piece 222 and the universal joint 30 can be achieved in various ways, such as through spline fitting, through threaded connection, etc. The present application does not limit the connection between the connecting piece 222 and the adjusting rod 221 and the connection between the connecting piece 222 and the universal joint 30.

[0052] In order to be able to assemble various structures of the steering system, the connecting piece 222 and the adjusting rod 221 are detachably connected. In this way, the connecting piece 222 that is suitable for the universal joint 30 of the steering system can be replaced as needed, thereby saving cost and being simple to operate.

[0053] In order to facilitate the connection between the second adjusting part 22 and the universal joint 30 at the lower end of the steering shaft 20, the sliding part 52 is cylindrically arranged and rotatably mounted on the second strip-shaped hole 51 along its own axis. In this way, the angle of the second adjusting part 22 can be rotated to relatively position the structure on the second adjusting part 22 for cooperating with the universal joint 30, so that the installation is convenient and the operation is simple.

[0054] It should be noted that the first strip-shaped hole 31 and the second strip-shaped hole 51 can be two separate holes. In the present application, the first strip-shaped hole 31 and the second strip-shaped hole 51 are connected. In this way, the processing is convenient.

[0055] Specifically, the adjusting assembly further comprises a second locking mechanism, the second locking mechanism comprises two second locking parts 241 arranged on the sliding part 52, the two second locking parts 241 are arranged on the left and right sides of the second strip-shaped hole 51 respectively, at least one of the two second locking parts 241 is arranged as a second movable locking part 241a, the second movable locking part 241a is movably mounted on the sliding part 52, so that the distance between the two second locking parts 241 is reduced to clamp the corresponding stand 11, the friction between the second locking part 241 and the stand 11 is increased, the position of the second adjusting part 22 is fixed after the position adjustment of the second adjusting part 22, or the distance between the two second locking parts 241 is increased to release the corresponding stand 11, the friction between the second locking part 241 and the stand 11 is reduced, the second adjusting part 22 is facilitated to slide up and down, the structure is simple and easy to operate.

[0056] Specifically, the side wall surface of the sliding part 52 is provided with external threads, the second movable locking part 241a is annularly arranged, the inner side wall of the second movable locking part 241a is provided with internal threads matched with the external threads, the second movable locking part 241a is threadedly connected with the sliding part 52, the second movable locking part 241a is moved along the axial direction of the sliding part 52 by screwing the second movable locking part 241a, so that the distance between the two second locking parts 241 is adjustable, the operation is simple, and the self-locking capability is achieved.

[0057] With reference to Figure 1 , the mounting frame further comprises a base 12 for being fixed to the ground to be tested, at least one of the two upright columns 11 is arranged as a movable upright column 11a which is slidably mounted to the base 12 in the left-right direction, so that the distance between the two upright columns 11 is adjustable, in this way, different lengths of the first adjusting part 21 and the second adjusting part 22 can be replaced as needed, and the versatility and applicability of the modal test bench 100 are improved.

[0058] It should be noted that, in order to facilitate the fixation of the base 12 to the ground to be tested, with reference to Figure 1 , the base comprises rectangular holes b distributed at four corners, and screws are inserted through the rectangular holes b to fix the base 12 to the ground, so that the structure is simple and easy to operate.

[0059] Further, in order to enable the movable upright column 11a to move accurately, a guide structure is arranged between the base 12 and the movable upright column 11a, the guide structure comprises a sliding groove 61 extending in the left-right direction and a boss 62 matched with the sliding groove 61, one of the sliding groove 61 and the boss 62 is arranged on the base 12, and the other is arranged on the movable upright column 11a, in this way, the boss 62 and the sliding groove 61 are matched to enable the movable upright column 11a to move accurately in the left-right direction, and the movement of the movable upright column 11a is prevented from being dislocated, so that the first adjusting part 21 and the second adjusting part 22 are not damaged, and the subsequent test structure is not affected.

[0060] In order to limit the continuous movement of the movable upright column 11a after the movable upright column 11a is moved into position, a second threaded hole 611 is arranged in the inner wall surface of the sliding groove 61, and the modal test bench 100 further comprises a screwing piece 7 which is inserted into and threadedly connected with the second threaded hole 611, so that the end of the screwing piece 7 can be moved to abut against the boss 62, in this way, the friction of the movable upright column 11a is increased, and the continuous movement of the movable upright column 11a is avoided, and the effect is good.

[0061] In order to facilitate the carrying of the modal test bench 100, the side of the base 12 is also formed with a slot 8 for insertion cooperation with the prongs of a forklift to facilitate transportation and simple operation.

[0062] It should be noted that there are various ways to form the slot, for example, the slot 8 is directly formed on the side of the base 12, and the slot 8 can also be formed by providing a square groove structure a on the base 12, and the square groove structure a is provided with a slot 8, and the specific application is not limited.

[0063] Referring to Figure 1 , the modal test bench 100 further comprises two reinforcing structures corresponding to the two upright columns 11, each of the reinforcing structures comprises two reinforcing plates 9, the two reinforcing plates 9 are arranged along the front and back of the two sides of the upright column 11, each of the reinforcing plates 9 is arranged along the up and down, one end of each of the reinforcing plates 9 is connected with the base 12, and the other end of the reinforcing plate 9 is connected with the side of the corresponding upright column 11. In this way, the lateral rigidity of the upright column 11 is increased, the structure is more stable, and the upright column 11 is prevented from shaking.

[0064] The application also provides a modal test device, and specifically, in the embodiment of the application, the modal test device adopts the modal test bench as described above, and the automobile adopts all the technical solutions of the above embodiment, and therefore has the technical effects brought by the technical solutions of the above embodiment, which will not be repeated here.

[0065] Specifically, when the modal test device is carried out by the above modal test bench, the steering system is matched with the modal test bench: first, the mounting seat 10 of the steering system is mounted to the bearing plate 42, the angle of the bearing plate 42 is adjusted by rotating the first adjusting part 21, the distance between the bearing plate 42 and the mounting plate 41 is adjusted, and the angle adjustment is realized; then the position of the second adjusting part is adjusted, the lower end of the steering system with the universal joint 30 is matched with the connecting piece 222, and the test device can obtain the test results of different states according to the test requirements.

[0066] Through the above main adjustable structure, when subsequent tests are carried out, for different steering system structures, only part of the tooling needs to be designed, and the test device can be quickly built, the cost of increasing each time of re-designing the tooling is reduced. The test working conditions of various column lengths of the steering system are met, and different lengths after the column is stretched can be simulated; the test working conditions of various angles between the upper and lower sections of the steering column can be simulated; through the variable mode, the limiting size of the test tooling is changed, and the processing cost of the test tooling is reduced.

[0067] The above merely provides the preferred embodiments of the present application, and is not intended to limit the patent scope of the present application. Any equivalent structure variations made according to the contents of the present application specification and drawings, or direct / indirect application in other related technical fields shall be included in the patent protection scope of the present application.

Claims

1. A modal test bench for multi-condition modal test of a steering system, the steering system comprising a mounting base, a steering shaft connected to the mounting base, and a universal joint provided at a lower end of the steering shaft, characterized in that, The modal test bench comprises: a mounting frame; and an adjusting assembly comprising a first adjusting part and a second adjusting part arranged in sequence from top to bottom, the first adjusting part and the second adjusting part are both slidably mounted on the mounting frame in the up-down direction, and the first adjusting part is rotatably mounted on the mounting frame in the left-right direction, wherein the first adjusting part is used to be connected with the mounting seat, and the second adjusting part is used to be hingedly connected with the universal joint; a middle part of the first adjusting part is further provided with a mounting part, the mounting part comprises a mounting plate, a bearing plate and an adjusting piece, the mounting plate is used to be mounted on the middle part of the first adjusting part, the bearing plate is arranged on a side of the mounting plate away from the first adjusting part, and is arranged in sequence from top to bottom and spaced apart from the mounting plate, the bearing plate is used to mount the mounting seat, and the adjusting piece is arranged between the mounting plate and the bearing plate to adjust the distance between the mounting plate and the bearing plate; the mounting frame comprises two vertical columns arranged in sequence in the left-right direction, the first adjusting part is arranged in the left-right direction, and the two ends of the first adjusting part and the two vertical columns are both provided with a movable structure, the movable structure comprises a first slot arranged on the vertical column and extending in the up-down direction, and a mounting cylinder arranged on the end of the first adjusting part and matched with the first slot, the mounting cylinder is rotatably mounted in the first slot in the up-down direction; the mounting frame further comprises a base, and the base is used to be fixed on the ground to be tested; at least one of the two vertical columns is arranged as a movable vertical column, and the movable vertical column is slidably mounted on the base in the left-right direction, so that the distance between the two vertical columns is adjustable.

2. The modal test bench of claim 1, wherein, the adjusting assembly further comprises a first locking mechanism, the first locking mechanism comprises two first locking parts arranged on the mounting cylinder, the two first locking parts are arranged on both sides of the first slot in the left-right direction respectively, at least one of the two first locking parts is arranged as a first movable locking part, the first movable locking part is movably mounted on the mounting cylinder, so that the distance between the two first locking parts is reduced to clamp the corresponding vertical column, or the distance between the two first locking parts is increased to release the corresponding vertical column; and / or the second adjusting part is arranged in the left-right direction, and the two ends of the second adjusting part and the vertical column are provided with a sliding structure, the sliding structure comprises a second slot arranged on the vertical column and extending in the up-down direction, and a sliding part arranged on the end of the second adjusting part and matched with the slot, the sliding part is slidably mounted in the second slot in the up-down direction; and / or a through hole is arranged on the mounting plate, a first threaded hole is arranged on the bearing plate corresponding to the through hole, and a threaded section of a stud passes through the through hole and the first threaded hole in sequence and is threadedly connected with the first threaded hole.

3. The modal test bench of claim 2, wherein, The side wall surface of the mounting cylinder is provided with external threads, the first movable locking part is annularly arranged, the inner side wall of the first movable locking part is provided with internal threads matched with the external threads, and the first movable locking part is threadedly connected with the mounting cylinder; and / or, The second adjusting part comprises an adjusting rod and a connecting piece, the adjusting rod extends along the left-right direction, two ends of the adjusting rod are respectively connected with the two sliding parts, the connecting piece is arranged at the middle position of the adjusting rod, one end of the connecting piece is connected with the adjusting rod, and the other end of the connecting piece is used for being connected with the universal joint; and / or, The sliding part is cylindrically arranged and can be rotatably mounted on the second strip-shaped hole along its own axis.

4. The modal test bench of claim 3, wherein, The adjusting assembly further comprises a second locking mechanism, the second locking mechanism comprises two second locking parts arranged on the sliding part, the two second locking parts are respectively arranged on the two sides of the second strip-shaped hole along the left-right direction, at least one of the two second locking parts is arranged as a second movable locking part, and the second movable locking part is movably mounted on the sliding part, so that the distance between the two second locking parts is reduced to clamp the corresponding stand or the distance between the two second locking parts is increased to release the corresponding stand.

5. The modal test bench of claim 4, wherein, The side wall surface of the sliding part is provided with external threads; The second movable locking part is annularly arranged, the inner side wall of the second movable locking part is provided with internal threads matched with the external threads, and the second movable locking part is threadedly connected with the sliding part.

6. The modal test bench of claim 1, wherein, A guide structure is arranged between the base and the movable stand, the guide structure comprises a sliding groove extending along the left-right direction and a boss matched with the sliding groove, one of the sliding groove and the boss is arranged on the base, and the other is arranged on the movable stand.

7. The modal test bench of claim 6, wherein A second threaded hole is arranged through the inner wall surface of the sliding groove; The modal test bench further comprises a threaded connecting piece, the threaded connecting piece is inserted into the second threaded hole and is threadedly connected with the second threaded hole, so that the end of the threaded connecting piece can move to abut against the boss.

8. A modal testing apparatus, characterized by, The modal test bench comprises the modal test bench according to any one of claims 1 to 7. The modal test bench comprises the modal test bench according to any one of claims 1 to 7.

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