Three-degree-of-freedom endurance test tool for rubber bushing

Abstract

The utility model relates to a three-degree-of-freedom endurance test tool for a rubber bushing. The three-degree-of-freedom endurance test tool comprises a swing action linear actuator limiting auxiliary tool, a radial action linear actuator limiting auxiliary tool, a rotation action load assembly and a press-fitting tool for simulating a bushing sleeve, the press-fitting tool for simulating the bushing and the sleeve is vertically connected with the swing action linear actuator limiting auxiliary tool through a bearing; the press-fitting tool for simulating the bushing and the sleeve is connected with the radial action linear actuator limiting auxiliary tool through a bearing, the rotation action load assemblies are clamped on the two sides of the press-fitting tool for simulating the bushing and the sleeve so that the bushing can be fixed in the axial direction, and the test tool is used for testing torsion, swing angle and radial synchronous three-degree-of-freedom loading of a rubber bushing product. The condition of multi-degree-of-freedom linkage loading under the actual road condition is simulated through the bench test of the automobile damping product, and the accuracy of the bench test of the rubber bushing product is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a three-degree-of-freedom durability test fixture for a rubber bushing. Background Art

[0002] As the test bench test continues to evolve from basic to complex, the basic single-degree-of-freedom loading test, or even the two-degree-of-freedom loading test, can no longer meet the requirements of rubber bushing durability testing.

[0003] Therefore, there is an urgent need in this field for a three-way rubber bushing durability test fixture for conducting multi-degree-of-freedom tests, including a fixture structure for torsion, swing angle, and radial synchronization tests. Utility Model Content

[0004] Aiming at the technical problem that the single-degree-of-freedom or two-degree-of-freedom loading test in the existing technology can no longer meet the requirements of the rubber bushing durability test, a three-degree-of-freedom durability test tool for rubber bushing is proposed.

[0005] The technical solution of the utility model is: a three-degree-of-freedom durability test tool for a rubber bushing, comprising a limit auxiliary tool for a swing-action linear actuator, a limit auxiliary tool for a radial-action linear actuator, a rotational load assembly, and a press-fit tool for simulating a bushing sleeve;

[0006] The swing-action linear actuator limit auxiliary fixture, the radial-action linear actuator limit auxiliary fixture, and the rotation-action load assembly are set on the experimental platform;

[0007] A press-fitting tool for simulating the bushing sleeve is provided with a through hole, a bushing mounting portion for sleeve-fitting the bushing is provided inside the through hole, radial bushing connecting ends are provided at the top and bottom of the press-fitting tool for simulating the bushing sleeve, the line connecting the center points of the two radial bushing connecting ends is perpendicular to the central axis of the through hole, a swing arm is provided on one side of the press-fitting tool for simulating the bushing sleeve, the central axis of the swing arm is perpendicular to the central axis of the through hole, and a swing arm connecting end is provided at the end of the swing arm away from the through hole;

[0008] The swing arm connection end is vertically connected to the swing-action linear actuator limit auxiliary tooling bearing; the radial connection end of the bushing is connected to the radial-action linear actuator limit auxiliary tooling bearing, and the rotating load component fixes the bushing on both sides of the through hole in the axial direction.

[0009] Preferably, the swing-action linear actuator limiting auxiliary tooling includes a first linear motion shaft mounting seat and a first linear motion shaft. The first linear motion shaft mounting seat is arranged on the experimental platform, and the first linear motion shaft can be adjusted in height up and down on the first linear motion shaft mounting seat.

[0010] Preferably, the first linear motion shaft includes a first linear motion shaft driven end, and the first linear motion shaft driven end is vertically connected to the swing arm connection end bearing.

[0011] Preferably, the radially acting linear actuator limiting auxiliary tooling includes a second linear motion shaft mounting seat and a second linear motion shaft. The second linear motion shaft mounting seat is arranged on the experimental platform, and the second linear motion shaft can be adjusted in height up and down on the second linear motion shaft mounting seat.

[0012] Preferably, the second linear motion shaft includes a second linear motion shaft driven end, and the second linear motion shaft driven end is connected to a bearing of a radial connection end of the bushing.

[0013] Preferably, the rotational load component includes a connecting clamping tool, with connecting arms provided at both ends of the connecting clamping tool, and clamping arms provided between the connecting arms, and the clamping arms are arranged on the connecting clamping tool so that the distance between them can be adjusted.

[0014] Preferably, the rotational load assembly also includes a first cylindrical ball bearing fixture and a second cylindrical ball bearing fixture, the first cylindrical ball bearing fixture and the second cylindrical ball bearing fixture are arranged on the experimental platform, the connecting arm is connected to the first cylindrical ball bearing fixture, and the other connecting arm away from one end of the first cylindrical ball bearing fixture is connected to the second cylindrical ball bearing fixture.

[0015] Preferably, the connecting arm is provided with a first transmission mounting hole; the clamping arm is provided with a second transmission mounting hole, and the center of the through hole, the center of the first transmission mounting hole, the center of the second transmission mounting hole, and the center of the bearing center holes of the first cylindrical ball bearing tooling and the second cylindrical ball bearing tooling are on the same horizontal line.

[0016] Preferably, the rotational load assembly further comprises a torsional actuator auxiliary tooling, which is arranged on the experimental platform and on a side of the second cylindrical ball bearing tooling away from the first cylindrical ball bearing tooling.

[0017] Preferably, the center line of the bottom of the torsion actuator auxiliary tooling is on the same horizontal line as the center lines of the bottoms of the first cylindrical ball bearing tooling and the second cylindrical ball bearing tooling.

[0018] The beneficial effects of the present invention are as follows: the present invention provides a three-degree-of-freedom durability test tool for a rubber bushing; it enables a bench test of a shock-absorbing product for an automobile to simulate multi-degree-of-freedom linkage loading under actual road conditions, thereby greatly improving the accuracy of the bench test of the rubber bushing product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1This is an overall schematic diagram of a three-degree-of-freedom durability test tool for a rubber bushing according to the present invention;

[0020] Figure 2 This is a schematic diagram of the press-fitting tooling for simulating a bushing and casing of the utility model;

[0021] Figure 3 This is a schematic diagram of the limiting auxiliary tooling for the linear actuator of the utility model;

[0022] Figure 4 This is a schematic diagram of the cylindrical ball bearing tooling of the utility model;

[0023] Figure 5 This is a schematic diagram of the connection and clamping tooling of the utility model;

[0024] In the figures, the component names corresponding to the reference numerals are as follows:

[0025] 1. Auxiliary tooling for limiting the swing-action linear actuator; 11. Mounting seat for the first linear motion shaft; 12. The first linear motion shaft; 121. The driven end of the first linear motion shaft; 2. Auxiliary tooling for limiting the radial-action linear actuator; 21. Mounting seat for the second linear motion shaft; 22. The second linear motion shaft; 221. The driven end of the second linear motion shaft; 3. The rotational load component; 31. The first cylindrical ball bearing tooling; 32. The second cylindrical ball bearing tooling; 33. The connecting clamping tooling; 331. The connecting arm; 3331. The first transmission mounting hole; 332. The clamping arm; 3332. The second transmission mounting hole; 34. The auxiliary tooling for the torsional actuator; 4. The press-fitting tooling for simulating the bushing sleeve; 41. The swing arm; 411. The swing arm connecting end; 42. The radial connecting end of the bushing; 43. The through hole; 44. The bushing mounting part. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0027] refer to Figure 1 、 2 As shown, the utility model provides a three-degree-of-freedom durability test tool for a rubber bushing, comprising a swing-action linear actuator limit auxiliary tool 1, a radial-action linear actuator limit auxiliary tool 2, a rotational load component 3, and a press-fit tool 4 for simulating a bushing sleeve;

[0028] The swing-action linear actuator limit auxiliary fixture 1, the radial-action linear actuator limit auxiliary fixture 2, and the rotational load assembly 3 are mounted on the experimental platform by bolts;

[0029] A through hole 43 is provided on the press-fitting fixture 4 for simulating the bushing sleeve, and a bushing mounting portion 44 for sleeve-fitting the bushing is provided inside the through hole 43. Bushing radial connecting ends 42 are provided at the top and bottom of the press-fitting fixture 4 for simulating the bushing sleeve, respectively. The line connecting the center points of the two bushing radial connecting ends 42 is perpendicular to the central axis of the through hole 43. A swing arm 41 is installed on one side of the press-fitting fixture 4 for simulating the bushing sleeve by means of bolts. The central axis of the swing arm 41 is perpendicular to the central axis of the through hole 43. A swing arm connecting end 411 is provided at the end of the swing arm 41 away from the through hole 43.

[0030] The swing arm connection end 411 is vertically connected to the swing-action linear actuator limit auxiliary tooling 1 via a fisheye bearing; the bushing radial connection end 42 is connected to the radial-action linear actuator limit auxiliary tooling 2 via a connecting fisheye bearing, and the rotational load assembly 3 is clamped on both sides of the through hole 43 to fix the bushing in the axial direction;

[0031] Specific, reference Figure 3 As shown, the swing-action linear actuator limiting auxiliary tooling 1 includes a first linear motion shaft mounting base 11 and a first linear motion shaft 12. The first linear motion shaft mounting base 11 is mounted on the experimental platform by bolts, and the first linear motion shaft 12 is mounted on the first linear motion shaft mounting base 11 by bolts, and the vertical height can be freely adjusted; the first linear motion shaft 12 includes a first linear motion shaft driven end 121, which can be a fisheye bearing. The first linear motion shaft driven end 121 is vertically connected to the swing arm connecting end 411;

[0032] The radially acting linear actuator limiting auxiliary tooling 2 includes a second linear motion shaft mounting seat 21 and a second linear motion shaft 22. The second linear motion shaft mounting seat 21 is also mounted on the experimental platform by bolts. The second linear motion shaft 22 is also mounted on the second linear motion shaft mounting seat 21 by bolts and can be freely adjusted in height. The second linear motion shaft 22 includes a second linear motion shaft driven end 221, which can be a fisheye bearing. The second linear motion shaft driven end 221 is connected to the radial connection end 42 of the bushing.

[0033] Two sets of linear actuator limit auxiliary fixtures have the advantage of freely adjustable height to accommodate samples of different sizes and types, which require different heights of the equipment axis vertical to the ground. The linear motion axes of the two sets of linear actuator limit auxiliary fixtures have the advantage of limiting and guiding the equipment's linear motion, eliminating excess degrees of freedom and reducing damage caused by lateral friction of the equipment.

[0034] refer to Figure 4 、 5As shown, the rotational load assembly 3 includes a first cylindrical ball bearing fixture 31, a second cylindrical ball bearing fixture 32, a connecting clamping fixture 33 and a torsional actuator auxiliary fixture 34; the first cylindrical ball bearing fixture 31, the second cylindrical ball bearing fixture 32, and the torsional actuator auxiliary fixture 34 are mounted on the experimental platform by bolts, and the bearings of the first cylindrical ball bearing fixture 31 and the second cylindrical ball bearing fixture 32 can be fisheye bearings, which realize offset angle correction; the first cylindrical ball bearing fixture 31, the second cylindrical ball bearing fixture 32 and the torsional actuator auxiliary fixture 34 are mounted on the experimental platform by bolts;

[0035] The connecting and clamping fixture 33 has connecting arms 331 at both ends, and two clamping arms 332 are provided on the inner side of the connecting arms 331. The clamping arms 332 are mounted on the connecting and clamping fixture 33 by bolts. The distance between the two clamping arms 332 can be adjusted to accommodate bushings of different lengths.

[0036] The connecting arm 331 is connected to the first cylindrical ball bearing fixture 31 by a bolt, and the other connecting arm 331 away from one end of the first cylindrical ball bearing fixture 31 is connected to the second cylindrical ball bearing fixture 32 by a bolt; the connecting arm 331 is provided with a first actuator mounting hole 3331; the clamping arm 332 is provided with a second actuator mounting hole 3332, and the center of the through hole 43, the center of the first actuator mounting hole 3331, the center of the second actuator mounting hole 3332, and the center of the bearing center holes of the first cylindrical ball bearing fixture 31 and the second cylindrical ball bearing fixture 32 are on the same horizontal line;

[0037] The torsion actuator auxiliary fixture 34 is arranged on a side of the second cylindrical ball bearing fixture 32 away from the first cylindrical ball bearing fixture 31, and the center line of the bottom of the torsion actuator auxiliary fixture 34 is on the same horizontal line as the center lines of the bottoms of the first cylindrical ball bearing fixture 31 and the second cylindrical ball bearing fixture 32;

[0038] The tooling 34 is an auxiliary tooling for the torsion actuator, which is used to connect and fix the torsion actuator so that the torsion actuator, the first cylindrical ball bearing tooling 31 and the second cylindrical ball bearing tooling 32 are installed in a concentric position.

[0039] The first cylindrical ball bearing fixture 31 and the second cylindrical ball bearing fixture 32 are used to limit and guide the device to rotate around the axis, eliminating the movement of redundant degrees of freedom and reducing damage caused by lateral friction of the device;

[0040] The function of the connecting clamping fixture 33 is to be applicable to bushings with different inner tube lengths, thus achieving universality;

[0041] The specific working method is as follows: first build the first cylindrical ball bearing fixture 31 and the second cylindrical ball bearing fixture 32, install them on the test platform with bolts, and wait for the next step;

[0042] Then move the two linear actuator limit auxiliary toolings to the corresponding linear cylinder positions to fix the linear cylinder and adjust the front and rear positions. The "two sets of linear actuator limit auxiliary toolings" can also freely adjust the up and down heights.

[0043] Press the rubber bushing into the bushing mounting portion 43 of the press-fitting tool 4 that simulates the bushing sleeve in advance. At the same time, both ends of the bushing are installed between the clamping arms 332. Furthermore, the driven end 121 of the first linear motion shaft is connected to the swing arm connecting end 41, and the driven end 221 of the second linear motion shaft is connected to the bushing radial connecting end 42.

[0044] Use bolts that meet the test force to connect to the fisheye bearings, and tighten the bolts in the test requirements to the specified torque requirements;

[0045] After all parts are connected, the linear motion displacement of the linear cylinder of the swing-action linear actuator limit auxiliary fixture 1 is converted into the corresponding angle as the swing angle test parameter; the linear cylinder of the swing-action linear actuator limit auxiliary fixture 1 converts the linear displacement motion mode into a swing mode around the axis through a swing arm method, and loads the sample with a load in the swing angle direction; the cylinder of the radial linear actuator limit auxiliary fixture 2 loads the sample with a radial load; the cylinder of the rotational load component 3 applies a rotational load around the axis to the sample;

[0046] Check the connection of each part, tightening requirements, input and edit of test parameters, pre-set protection parameters of the equipment, start the equipment and begin the test.

[0047] The beneficial effects are: realizing the bench test of automobile shock absorption products to simulate the multi-degree-of-freedom linkage loading under actual road conditions, greatly improving the accuracy of the bench test of rubber bushing products.

[0048] It should be noted that the orientations or positional relationships indicated by the above-mentioned terms "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. "Multiple" means two or more. "Installation", "connected", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be considered as the scope of protection of the present invention. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the present invention, which are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A three-degree-of-freedom durability test fixture for a rubber bushing, characterized in that: It comprises a swing-action linear actuator limiting auxiliary tooling (1), a radial-action linear actuator limiting auxiliary tooling (2), a rotation-action load component (3) and a press-fit tooling (4) for simulating a bushing sleeve; The swing-action linear actuator limiting auxiliary tooling (1), the radial-action linear actuator limiting auxiliary tooling (2), and the rotation-action load assembly (3) are arranged on the experimental platform; The press-fitting fixture (4) for simulating the bushing sleeve is provided with a through hole (43), a bushing mounting portion (44) for sleeve-connecting the bushing is provided inside the through hole (43), bushing radial connecting ends (42) are provided at the top and bottom of the press-fitting fixture (4) for simulating the bushing sleeve, respectively, a line connecting the center points of the two bushing radial connecting ends (42) is perpendicular to the center axis of the through hole (43), a swing arm (41) is provided on one side of the press-fitting fixture (4) for simulating the bushing sleeve, the center axis of the swing arm (41) is perpendicular to the center axis of the through hole (43), and a swing arm connecting end (411) is provided at one end of the swing arm (41) away from the through hole (43); The swing arm connection end (411) is vertically connected to the bearing of the swing-action linear actuator limiting auxiliary tooling (1); the bushing radial connection end (42) is connected to the bearing of the radial-action linear actuator limiting auxiliary tooling (2), and the rotational load component (3) fixes the bushing on both sides of the through hole (43) in the axial direction.

2. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 1, characterized in that: The swing-action linear actuator limiting auxiliary tooling (1) comprises a first linear motion shaft mounting seat (11) and a first linear motion shaft (12); the first linear motion shaft mounting seat (11) is arranged on an experimental platform; and the first linear motion shaft (12) is arranged on the first linear motion shaft mounting seat (11) in a manner that allows the first linear motion shaft (12) to be adjusted in height up and down.

3. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 2, characterized in that: The first linear motion shaft (12) comprises a first linear motion shaft driven end (121), and the first linear motion shaft driven end (121) is vertically connected to the swing arm connection end (411) by a bearing.

4. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 1, characterized in that: The radially acting linear actuator limiting auxiliary tooling (2) comprises a second linear motion shaft mounting seat (21) and a second linear motion shaft (22); the second linear motion shaft mounting seat (21) is arranged on the experimental platform; and the second linear motion shaft (22) is arranged on the second linear motion shaft mounting seat (21) so as to be able to adjust the height up and down.

5. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 4, characterized in that: The second linear motion shaft (22) includes a second linear motion shaft driven end (221), and the second linear motion shaft driven end (221) is bearing-connected to the radial connection end (42) of the bushing.

6. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 1, characterized in that: The rotational load assembly (3) comprises a connecting clamping tool (33), wherein connecting arms (331) are respectively provided at both ends of the connecting clamping tool (33), a clamping arm (332) is provided between the connecting arms (331), and the clamping arms (332) are arranged on the connecting clamping tool (33) so that the distance between them can be adjusted.

7. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 6, characterized in that: The rotational load assembly (3) further comprises a first cylindrical ball bearing fixture (31) and a second cylindrical ball bearing fixture (32), wherein the first cylindrical ball bearing fixture (31) and the second cylindrical ball bearing fixture (32) are arranged on an experimental platform, the connecting arm (331) is connected to the first cylindrical ball bearing fixture (31), and another connecting arm (331) away from one end of the first cylindrical ball bearing fixture (31) is connected to the second cylindrical ball bearing fixture (32).

8. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 7, characterized in that: The connecting arm (331) is provided with a first transmission mounting hole (3331); the clamping arm (332) is provided with a second transmission mounting hole (3332); the center of the through hole (43), the center of the first transmission mounting hole (3331), the center of the second transmission mounting hole (3332), and the centers of the bearing center holes of the first cylindrical ball bearing fixture (31) and the second cylindrical ball bearing fixture (32) are on the same horizontal line.

9. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 7, characterized in that: The rotational load assembly (3) further comprises a torsion actuator auxiliary tooling (34), which is arranged on the experimental platform and is arranged on a side of the second cylindrical ball bearing tooling (32) away from the first cylindrical ball bearing tooling (31).

10. The three-degree-of-freedom durability test fixture for rubber bushings according to claim 9, characterized in that: The center line of the bottom of the torsion actuator auxiliary tooling (34) is on the same horizontal line as the center lines of the bottoms of the first cylindrical ball bearing tooling (31) and the second cylindrical ball bearing tooling (32).

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