CN-122016202-A - Bidirectional loading air spring stiffness testing device

CN122016202ACN 122016202 ACN122016202 ACN 122016202ACN-122016202-A

Abstract

The invention discloses a bidirectional loading air spring stiffness testing device, which relates to the technical field of air spring stiffness testing, and comprises a foundation platform, a detection mechanism and an upright post, wherein the detection mechanism is arranged on the rear side of the top of the foundation platform, the upright post is arranged on the front side of the top of the foundation platform, the detection mechanism comprises a bottom plate, a first electric telescopic rod is arranged on the top of the bottom plate, a connecting cover is arranged at the top output end of the first electric telescopic rod, a connecting plate is arranged on the rear side of the connecting cover, and the pressure area is changed, so that stiffness values under different contact areas are calculated, and the stiffness abrupt change characteristics of an air spring when sudden hard impact and load are suddenly compressed, the cooperative stress response of a rubber bag body and an internal limiting structure, and the deformation resistance and breakage resistance under extreme extrusion working conditions are captured, so that the gap of the conventional test for insufficient coverage of an uncertainty impact load in a complex road condition and a natural environment is filled.

Inventors

YANG BO
Liu Shuangchen
QIANG XIAOHUI
LIU JIANCHENG
WANG SHENGHE
HUANG ZEYU

Assignees

青岛航天瑞莱海检科技有限公司
天津航天瑞莱科技有限公司
北京强度环境研究所

Dates

Publication Date: 20260512
Application Date: 20260123

Claims (10)

1. The bidirectional loading air spring stiffness testing device is characterized by comprising a foundation platform (1), a detection mechanism (2) and an upright post (33), wherein the detection mechanism (2) is arranged on the rear side of the top of the foundation platform (1), and the upright post (33) is arranged on the front side of the top of the foundation platform (1); The detection mechanism (2) comprises a bottom plate (201), first electric telescopic rod (202) is installed at the top of bottom plate (201), connecting cover (203) are installed at the top output of first electric telescopic rod (202), connecting plate (204) are installed to the rear side of connecting cover (203), second electric telescopic rod (205) are installed to the top inboard of connecting plate (204), connecting rod (211) are installed in the other end outside of second electric telescopic rod (205) the inboard of connecting cover (203), connecting rod (211) are installed to the output of second electric telescopic rod (205), connecting rod (211) the other end runs through connecting cover (203) and install pressure sensor (210), interior pole (209) are installed to the opposite side of pressure sensor (210), the outside sliding connection of interior pole (209) has an outer telescopic tube (208), two slide plates (207) are installed in the outside of outer telescopic tube (208).
2. The device for testing the stiffness of the air spring loaded in two directions according to claim 1, wherein a sliding groove (206) is slidably connected to the outer side of the sliding plate (207), the sliding groove (206) is arranged on the front side of the connecting cover (203), a first thread ring (212) is arranged on the outer side of the connecting rod (211), a first thread cylinder (213) is sleeved on the outer side of the connecting rod (211), the first thread cylinder (213) is in threaded connection with the connecting rod (211) through the first thread ring (212), a second thread ring (214) is arranged on the outer side of the first thread cylinder (213), a second thread cylinder (215) is sleeved on the outer side of the second thread ring (214), the second thread cylinder (215) is in threaded connection with the first thread cylinder (213) through the second thread ring (214), and a laser distance sensor (216) is arranged at the bottom of the extension cylinder (208).
3. The device for testing the stiffness of the air spring loaded in two directions is characterized in that the number of the upright posts (33) is four, two primary cross beams (3) are arranged at the tops of the upright posts (33), two secondary cross beams (4) are arranged at the tops of the primary cross beams (3), a vertical adapter plate (31) is arranged at the bottom of the secondary cross beams (4), a vertical actuator (29) is arranged at the bottom of the vertical adapter plate (31), a vertical pre-stressing ring (5) is arranged at the bottom output end of the vertical actuator (29), and a first distance sensor (6) is arranged at the bottom of the vertical pre-stressing ring (5).
4. The device for testing the stiffness of the air spring loaded bidirectionally according to claim 3, wherein the bottom of the first distance sensor (6) is provided with a hinged double ear (7), the inner side of the hinged double ear (7) is rotationally connected with a pin roll (8), and the outer side of the pin roll (8) is rotationally connected with a hinged single ear (9).
5. The device for testing the stiffness of the air spring loaded bidirectionally according to claim 4, wherein an upper shearing resistant platform (14) is arranged at the bottom of the hinged single lug (9), a plurality of triangular plates (10) are arranged around the top of the upper shearing resistant platform (14), and vertical linear sliding blocks (11) are arranged on the outer sides of the triangular plates (10).
6. The device for testing the stiffness of the air spring loaded bidirectionally according to claim 5, wherein the inner sides of the plurality of vertical linear sliding blocks (11) are respectively and slidably connected with a vertical linear guide rail (12), the outer sides of the plurality of vertical linear guide rails (12) are respectively provided with a vertical adapter plate (13), and the outer sides of the plurality of vertical adapter plates (13) are arranged on the inner sides of the corresponding upright posts (33).
7. The device for testing the stiffness of the air spring loaded in two directions according to claim 6, wherein an upper cover plate (15) is arranged at the bottom of the upper shearing-resistant platform (14), an air spring piece (16) is arranged at the bottom of the upper cover plate (15), a lower foot plate (17) is arranged at the bottom of the air spring piece (16), a first pressurizing opening (34) is communicated with the outer top of the air spring piece (16), an air pressure sensor (36) is arranged at the inner side of the first pressurizing opening (34), a communication fixing frame (37) is arranged at the outer side of the air pressure sensor (36), the communication fixing frame (37) is arranged at the inner side of the first pressurizing opening (34), and a second pressurizing opening (35) is communicated with the outer bottom of the air spring piece (16).
8. The device for testing the stiffness of the air spring loaded bidirectionally according to claim 7, wherein a lower shear platform (18) is arranged at the bottom of the lower foot plate (17), a plurality of transverse linear sliding blocks (19) are arranged at the bottom of the lower shear platform (18), two transverse linear guide rails (20) are connected to the inner sides of the bottoms of the transverse linear sliding blocks (19) in a sliding mode, and a lower sliding rail platform (21) is arranged at the bottom of the transverse linear guide rails (20).
9. The device for testing the stiffness of the air spring loaded bidirectionally according to claim 8, wherein a vertical force sensor (22) is arranged at the bottom of the sliding rail lower platform (21), a bottom fixing plate (23) is arranged at the bottom of the vertical force sensor (22), the bottom fixing plate (23) is arranged at the top of the foundation platform (1), the bottom fixing plate (23) is positioned at the middle positions of a plurality of upright posts (33), a transverse adapter seat (24) is arranged at the outer side of the lower shear-resistant platform (18), and a transverse extension rod (26) is arranged at the other side of the transverse adapter seat (24).
10. The device for testing the stiffness of the air spring loaded in two directions according to claim 9, wherein a transverse force sensor (25) is arranged at the other end of the transverse extension rod (26), a second distance sensor (38) is arranged at the outer side of the transverse extension rod (26), a transverse pre-stressing ring (32) is arranged at the other side of the transverse force sensor (25), a transverse actuator (30) is arranged at the other side of the transverse pre-stressing ring (32), a transverse adapter plate (27) is arranged at the other end of the transverse actuator (30), a triangular fixed support (28) is arranged at the other side of the transverse adapter plate (27), and the triangular fixed support (28) is arranged at the top of the foundation platform (1).

Description

Bidirectional loading air spring stiffness testing device Technical Field The invention relates to the technical field of air spring stiffness testing, in particular to a bidirectional loading air spring stiffness testing device. Background The air spring commonly called as an air bag is an elastic element which uses compressed air as an elastic medium, is generally composed of a rubber bag body and a metal cover plate, has the main functions of realizing vibration isolation and support, has remarkable nonlinear characteristics compared with the traditional metal spiral spring, has the most outstanding advantages of variable rigidity and height self-adjusting capability, can effectively isolate high-frequency vibration and absorb impact, and is widely applied to the vibration and noise reduction fields of commercial vehicle suspension systems, rail transit and precision industrial equipment. The bidirectional loading air spring stiffness testing device is mainly used for simulating a complex stress state of an air spring under actual working conditions, and a core framework of the bidirectional loading air spring stiffness testing device generally comprises a multichannel coordinated loading system, namely a high-precision actuator is vertically arranged for applying main static load or dynamic excitation, and an auxiliary actuator is horizontally arranged for simulating lateral force or coupling load of vertical and lateral directions in vehicle running. The device integrates a force sensor and a high-precision displacement sensor, respectively acquires force value change and deformation data in the loading process in real time, and realizes synchronous or asynchronous loading in the vertical and horizontal directions by matching with a closed-loop control system, so that the dynamic and static stiffness characteristics of the air spring under the combined working conditions of stretching, compression and shearing can be accurately measured, and key data support is provided for evaluating the supporting performance and stability of the air spring under complex road conditions. However, the existing bidirectional loading air spring stiffness testing device has the following defects: The current bidirectional loading air spring stiffness testing device on the market mainly adopts an electrohydraulic servo multichannel coordinated loading technology, and simulates the compression, stretching and shearing composite stress state of an air spring under the actual working condition through the cooperative cooperation of a vertical actuator and a horizontal actuator, so that high-precision three-dimensional mechanical data support is provided for the stability design of a vehicle suspension system, but when the air spring is actually used, an off-road vehicle with part of the air spring is usually used for off-road running, and therefore the air spring is easy to collide and squeeze due to the uncertainty brought by road conditions and natural environment. The present invention therefore proposes a bi-directional loaded air spring rate testing device to address the problems set forth above. Disclosure of Invention The invention aims to provide a bidirectional loading air spring stiffness testing device, when in detection, a vertical actuator drives a pre-stress ring and a sensor to press down, a hinging structure is matched with a shear-resistant platform to slide along a vertical guide rail, stable deflection prevention in the pressing process is ensured, after vertical detection, a transverse actuator is started to push the lower shear-resistant platform to drive the bottom of an air spring to deviate so as to detect bending stiffness, then an electric telescopic rod is utilized to move a pressing mechanism to a corresponding position, an inner rod is pushed to locally press the surface of the air spring, stiffness is obtained by combining pressure with a laser distance sensor, finally, a thread cylinder is adjusted to push an outer telescopic cylinder to move forward, the pressed area is changed, so that stiffness values under different contact areas are calculated, and the stiffness abrupt change characteristics of the air spring under abrupt hard impact and abrupt compression of load, the cooperative stress response of a rubber bag body and an inner limiting structure, and the deformation resistance and breakage resistance under extreme extrusion working conditions are effectively captured, so that the conventional test is insufficient in covering the uncertainty impact load in complex road conditions and natural environment. The technical scheme is that the bidirectional loading air spring stiffness testing device comprises a foundation platform, a detection mechanism and a stand column, wherein the detection mechanism is arranged on the rear side of the top of the foundation platform, and the stand column is arranged on the front side of the top of the foundation platform; The detection mechanism comprises