Fatigue resistance test device for suspension rubber sleeve of commercial vehicle cab
By designing a multi-directional fatigue testing device, the multi-directional mechanical environment of the rubber bushing in the whole vehicle is simulated, which solves the problem that the existing bench verification method cannot truly simulate the fatigue of the rubber bushing, and improves the durability and verification accuracy of the rubber bushing.
Patent Information
- Application Number
- CN202520409896.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing bench testing methods for suspension assemblies cannot effectively simulate the fatigue performance of rubber bushings under real-world conditions, leading to easy tearing of the rubber bushings during vehicle use and affecting the shock absorption function.
A fatigue testing device for the suspension rubber sleeve of a commercial vehicle cab was designed. Through the Z-axis and X-axis slides on the fixture base plate, the load application mechanism and the torque application mechanism, the device simulates the multi-directional fatigue test of the rubber sleeve during the operation of the whole vehicle, including vertical and horizontal tension and compression and torsional forces.
This improves the accuracy of rubber bushing fatigue testing, making it closer to the working conditions of a complete vehicle, thereby enhancing the accuracy of verification and product quality, and ensuring the durability of the rubber bushing.
Smart Images
Figure CN223910687U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the field of endurance test device, especially a commercial vehicle cab suspension rubber sleeve's endurance test device. BACKGROUND
[0002] The commercial vehicle cab suspension mainly bears the functions of supporting, damping, vibration isolation and maintaining the stability of the cab, thereby ensuring the safety, smoothness and comfort of the cab. The rubber sleeve inside the suspension swing arm is the core part of damping. It can be said that the service life of the cab suspension rubber sleeve directly affects the service life of the whole vehicle cab damping. Therefore, the fatigue test of the suspension rubber sleeve is particularly critical.
[0003] At present, the verification of the fatigue of the cab suspension rubber sleeve depends on the bench verification of the suspension assembly. The verification method is as follows: the sample is installed on the test bench according to the real vehicle state, and the sample is ensured to be in the initial state without stress. Then ±30mm is respectively applied to the rubber sleeve of the left and right turnover arms, the frequency is 1Hz, and the fatigue test is at least 100000 times. The sample state change is monitored during the test process. There is no rupture and deformation affecting the function of the sample during and after the test. The bench verification of the existing suspension assembly is more inclined to the strength and stiffness detection of the stabilizer bar, swing arm and other metal parts, ignoring the effective verification of the rubber sleeve inside the swing arm, resulting in that the metal parts are intact during the whole vehicle road test, but the rubber sleeve inside the swing arm is torn, causing the damping function of the whole cab suspension to be lost. SUMMARY
[0004] The utility model provides a commercial vehicle cab suspension rubber sleeve's endurance test device, and the purpose is to solve the technical problem that the existing test bench cannot simulate the real working condition.
[0005] In order to solve the above technical problem, the technical scheme of the utility model is: the commercial vehicle cab suspension rubber sleeve's endurance test device, including clamp base plate, its characterized in that: the clamp base plate is equipped with Z direction floating seat, the supporting surface of Z direction floating seat is equipped with X direction sliding seat, X direction sliding seat is used for fixing rubber sleeve test piece, one side of X direction sliding seat is equipped with X direction load applying mechanism, the top of X direction sliding seat is equipped with Z direction load applying mechanism, the other side of X direction sliding seat is equipped with test piece torsion applying mechanism;The test piece on X direction sliding seat can simultaneously bear the tension and compression force of Z direction and X direction and the torsion action force around the center hole.
[0006] The structure of the Z direction floating seat is further limited, which comprises an adapter base plate, a plurality of guide holes are distributed on the adapter plate, a sliding sleeve is arranged in the guide hole, a guide sliding column is arranged in the sliding sleeve, a limiting nut is arranged at the upper end of the guide sliding column, a compression spring is arranged on the lower end of the guide sliding column, and the lower end of the guide sliding column is fixedly connected with the clamp base plate.
[0007] Further, the X-direction sliding seat comprises a fixed block, a test piece fixing cavity is arranged in the fixed block, a lower guide block is arranged on the bottom surface of the fixed block, a lower sliding seat is arranged on the lower guide block, the lower sliding seat is fixedly connected with the adapter bottom plate in the Z-direction floating seat, the sliding direction of the lower sliding seat is the X direction, a left guide block is arranged on the left side surface of the fixed block, and an upper guide block is arranged on the top surface of the fixed block.
[0008] Further, the X-direction load applying mechanism comprises an X-direction oil cylinder, an X-direction inner fixed block and a left sliding seat, the X-direction inner fixed block is fixedly connected with the working end of the X-direction oil cylinder, the other end of the X-direction inner fixed block is fixedly connected with the left sliding seat, the left sliding seat is slidably connected with the left guide block, and the sliding direction of the left sliding seat is the Z direction.
[0009] Further, the Z-direction load applying mechanism comprises a Z-direction oil cylinder, an adapter plate, a Z-direction inner fixed block, an upper sliding seat, a support, a sliding cylinder and a sliding shaft, the working end of the Z-direction oil cylinder is connected with the Z-direction inner fixed block through the adapter plate, the Z-direction inner fixed block is fixedly connected with the upper sliding seat, the upper sliding seat is slidably connected with the upper guide block, the sliding direction of the upper sliding seat is the X direction, the sliding cylinder is fixedly connected with the support, the sliding shaft is slidably connected with the sliding cylinder, and the top end of the sliding shaft is fixedly connected with the other end of the adapter plate.
[0010] Further, the test piece torsion applying mechanism comprises a column, a rotating shaft, a fish eye bearing, an adapter and a torsion oil cylinder, the columns are arranged on the jig bottom plate, the column is used for supporting the rotating shaft, one end of the rotating shaft is fixedly connected with the fish eye bearing, the eccentric part of the fish eye bearing is connected with the adapter through a rotating pin, and the other end of the adapter is fixedly connected with the working end of the torsion oil cylinder.
[0011] Further, the rotating shaft comprises a main shaft and an auxiliary shaft, a positioning hole of the auxiliary shaft is arranged on the end surface of the main shaft, and the positioning end of the auxiliary shaft is fixedly connected with the main shaft through a screw; the main shaft is used for transmission connection, and the auxiliary shaft is used for connecting the test piece.
[0012] Beneficial effects: the endurance test device designed by the utility model is to take the rubber sleeve as a test main body and carry out more close to the whole vehicle multidirectional fatigue test, so that the whole vehicle working condition is more close, the accuracy of verification is improved, a more direct and quick guidance direction is provided for quality improvement of products, and the utility model is suitable for wide promotion. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic diagram of the utility model.
[0014] Figure 2 It is a local enlarged view of the utility model.
[0015] Figure 3 is a perspective view of the utility model.
[0016] Figure 4 is the structure diagram of the rotating shaft in the utility model. DETAILED DESCRIPTION
[0017] As Figure 1 shown, the commercial vehicle cab suspension rubber sleeve endurance test device, including clamp base plate 1, clamp base plate is equipped with Z direction floating seat 2, the support surface of Z direction floating seat is equipped with X direction sliding seat 3, X direction sliding seat is used for fixing rubber sleeve test piece 4, one side of X direction sliding seat is equipped with X direction load applying mechanism 5, the upper of X direction sliding seat is equipped with Z direction load applying mechanism 6, the other side of X direction sliding seat is equipped with test piece torsion applying mechanism 7;In the actual operation of whole vehicle, as the rubber sleeve of cab suspension, it is actually subjected to the tension and pressure from up and down, front and back direction and the torsion action around the center hole simultaneously;And if using the existing suspension assembly bench verification method, only the unidirectional force from up and down direction acts on the rubber sleeve, the most real working condition cannot be simulated;The test piece on X direction sliding seat can simultaneously bear the tension and pressure of Z direction (up and down), X direction (front and back) and the torsion force around the center hole, and the floating structure makes the simulation effect closer to the actual operation working condition of whole vehicle, so as to achieve the verification purpose consistent with the working condition of whole vehicle;
[0018] As Figure 2 and Figure 3 shown, the structure of Z direction floating seat 2 includes adapter base plate 21, a plurality of guide holes are distributed on the adapter base plate, a sliding sleeve 22 is arranged in the guide hole, a guide slide column 23 is arranged in the sliding sleeve, a limiting nut 24 is arranged at the upper end of the guide slide column, a compression spring 25 is arranged on the lower end of the guide slide column, and the lower end of the guide slide column is fixedly connected with the clamp base plate;The floating structure plays the role of buffering and auxiliary return, and this structure is simple, low in manufacturing cost and long in service life;
[0019] As Figure 2 shown, the structure of X direction sliding seat 3 includes fixed block 31, a test piece fixing cavity is arranged in the fixed block, a lower guide block 32 is arranged on the bottom surface of the fixed block, a lower sliding seat 33 is arranged on the lower guide block, the lower sliding seat is fixedly connected with the adapter base plate 21 in Z direction floating seat, the sliding direction of the lower sliding seat is X direction, a left guide block 34 is arranged on the left side surface of the fixed block, and an upper guide block 35 is arranged on the top surface of the fixed block;
[0020] As Figure 2 and Figure 3As shown, the structure of the X-direction load application mechanism 5 includes an X-direction cylinder 51, an X-direction inner fixing block 52, and a left slide block 53. The X-direction inner fixing block is fixed to the working end of the X-direction cylinder, and the other end of the X-direction inner fixing block is fixedly connected to the left slide block. The left slide block is slidably connected to the left guide block, and the sliding direction of the left slide block is Z-direction.
[0021] like Figure 2 and Figure 3 As shown, the structure of the Z-direction load application mechanism 6 includes a Z-direction cylinder 61, a transition plate 62, a Z-direction inner fixed block 63, an upper slide 64, a bracket 65, a slide cylinder 66, and a slide shaft 67. The working end of the Z-direction cylinder is connected to the Z-direction inner fixed block via the transition plate. The Z-direction inner fixed block is fixedly connected to the upper slide. The upper slide is slidably connected to the upper guide block. The sliding direction of the upper slide is X-direction. The slide cylinder is fixed to the bracket. The slide shaft is slidably connected to the slide cylinder. The top end of the slide shaft is fixedly connected to the other end of the transition plate. The advantages of this structure are: 1) The inner fixed block facilitates connection and improves working stability; 2) The guide mechanism formed by the slide shaft and slide cylinder can improve the sliding connection accuracy between the upper slide and the upper guide block.
[0022] like Figure 2 and Figure 3 As shown, the structure of the test piece torque application mechanism 7 includes a column 71, a rotating shaft 72, a fisheye bearing 73, an adapter 74, and a torque cylinder 75. The column is arranged on the base plate of the fixture and supports the rotating shaft. One end of the rotating shaft is fixedly connected to the fisheye bearing. The eccentric part of the fisheye bearing is connected to the adapter through a pivot pin. The other end of the adapter is fixedly connected to the working end of the torque cylinder. This structure is simple, has low manufacturing cost, long service life, and is conducive to improving the stability of operation.
[0023] like Figure 4 As shown, the rotating shaft 72 consists of a main shaft 721 and a secondary shaft 722. The end face of the main shaft is provided with a secondary shaft positioning hole, and the positioning end of the secondary shaft is fixedly connected to the main shaft by a screw 723. The main shaft is used for transmission connection, and the secondary shaft is used for connecting the test piece. This structure facilitates the installation and removal of the secondary shaft, thereby facilitating the connection of the test piece.
[0024] The clamp base plate and bracket are fixed on the base plate, and the X-axis cylinder, Z-axis cylinder and torque cylinder are fixed to the base plate through cylinder seats.
[0025] The fixed connections described in this manual refer to fastener connections or welding, etc.
[0026] The utility model discloses a test piece fixing cavity is pressed to the fixed block to rubber sleeve, the auxiliary shaft is passed from the center hole of test piece rubber sleeve, and the auxiliary shaft is matched with the clearance of rubber sleeve, then the fixed block is placed on the lower slide seat, the positioning end of auxiliary shaft is fixedly connected with the main shaft through screw, and the other end of auxiliary shaft is installed detachable stand, realizes stable support, starts X direction oil cylinder, Z direction oil cylinder, makes the upper slide seat and the upper guide block sliding connection, and the left slide seat and the left guide block sliding connection, when testing, simultaneously starts X direction oil cylinder, Z direction oil cylinder and torsion oil cylinder, and the torsion oil cylinder drives the main shaft to make small angle reciprocating rotation through fish eye bearing and adapter, makes rubber sleeve produce deformation.
[0027] Test condition setting: 1) X direction oil cylinder with the position of 0 force value as midpoint, and setting the amplitude of forward and backward as 4.5mm; 2) Z direction oil cylinder with the position of 0 force value as midpoint, and setting the amplitude of downward and upward as 3.3mm; 3) torsion oil cylinder with the position of 0 force value as midpoint, and setting the amplitude of forward and backward as 5.24mm.
Claims
1. A durability test device for a cab suspension rubber bushing of a commercial vehicle, comprising a jig base plate, characterized in that: The Z-direction floating seat is arranged on the clamp base plate, a supporting surface of the Z-direction floating seat is provided with an X-direction sliding seat, the X-direction sliding seat is used for fixing a rubber sleeve test piece, one side of the X-direction sliding seat is provided with an X-direction load applying mechanism, an upper portion of the X-direction sliding seat is provided with a Z-direction load applying mechanism, and the other side of the X-direction sliding seat is provided with a test piece torsion applying mechanism; the test piece on the X-direction sliding seat can simultaneously bear Z-direction and X-direction tensile and compressive forces and torsional action force around the center hole.
2. The durability test device for a cab suspension rubber bushing of a commercial vehicle according to claim 1, characterized in that: The Z-direction floating seat comprises an adapter base plate, a plurality of guide holes are distributed on the adapter base plate, a sliding sleeve is arranged in the guide hole, a guide sliding column is arranged in the sliding sleeve, a limiting nut is arranged at the upper end of the guide sliding column, a compression spring is arranged on the lower end of the guide sliding column, and the lower end of the guide sliding column is fixedly connected with the clamp base plate.
3. The durability test device for a cab suspension rubber bushing of a commercial vehicle according to claim 1 or 2, characterized in that: The X-direction sliding seat comprises a fixed block, a test piece fixing cavity is arranged in the fixed block, a lower guide block is arranged on the bottom surface of the fixed block, an upper guide block is arranged on the top surface of the fixed block, and a left guide block is arranged on the left side surface of the fixed block.
4. The device for durability test of the rubber suspension sleeve of the cab of a commercial vehicle according to claim 3, characterized in that: The X-direction load applying mechanism comprises an X-direction oil cylinder, an X-direction inner fixed block and a left sliding seat, the X-direction inner fixed block is fixedly connected with the working end of the X-direction oil cylinder, the other end of the X-direction inner fixed block is fixedly connected with the left sliding seat, the left sliding seat is slidably connected with the left guide block, and the sliding direction of the left sliding seat is the Z-direction.
5. The durability test device for a cab suspension rubber bushing of a commercial vehicle according to claim 1 or 2 or 4, characterized in that: The Z-direction load applying mechanism comprises a Z-direction oil cylinder, an adapter plate, a Z-direction inner fixed block, an upper sliding seat, a bracket, a sliding cylinder and a sliding shaft, the working end of the Z-direction oil cylinder is connected with the Z-direction inner fixed block through the adapter plate, the Z-direction inner fixed block is fixedly connected with the upper sliding seat, the upper sliding seat is slidably connected with the upper guide block, the sliding direction of the upper sliding seat is the X-direction, the sliding cylinder is fixedly connected with the bracket, the sliding shaft is slidably connected with the sliding cylinder, and the top end of the sliding shaft is fixedly connected with the other end of the adapter plate.
6. The device for durability test of the rubber suspension bushing of the cab of a commercial vehicle according to claim 5, characterized in that: The test piece torsion applying mechanism comprises a stand, a rotating shaft, a fish eye bearing, an adapter and a torsion oil cylinder, the stands are arranged on the clamp base plate, the stand is used for supporting the rotating shaft, one end of the rotating shaft is fixedly connected with the fish eye bearing, the eccentric part of the fish eye bearing is connected with the adapter through a rotating pin, and the other end of the adapter is fixedly connected with the working end of the torsion oil cylinder.
7. The device for durability testing of a rubber suspension bushing of a cab of a commercial vehicle according to claim 6, characterized in that The rotating shaft comprises a main shaft and a secondary shaft, a secondary shaft positioning hole is arranged on the end surface of the main shaft, and the positioning end of the secondary shaft is fixedly connected with the main shaft through a screw; the main shaft is used for transmission connection, and the secondary shaft is used for connecting the test piece.