Rubber node composite working condition fatigue test device

Abstract

The utility model relates to a rubber node composite working condition fatigue test device, which comprises a vertical loading oil cylinder arranged on a test platform through a rack, the device is characterized in that a horizontal loading oil cylinder is fixed on the test platform through a horizontal oil cylinder bracket, a vertical loading module is arranged below the vertical loading oil cylinder in the rack through a supporting plate, and the upper end of the vertical loading module is connected with the output end of the vertical loading oil cylinder; a fatigue test tool is arranged on the test platform and comprises a single-shaft linear sliding table, a lower supporting plate is supported on a sliding plate of the single-shaft linear sliding table, a transmission plate is installed on the lower supporting plate in a sliding mode, and a supporting disc is arranged on the transmission plate and fixed through a pressing plate. A connecting seat is fixed on one side of the transmission plate and is connected with the output end of the horizontal loading oil cylinder; the fatigue test tool is further provided with two sets of clamps which are connected with each other through the vertically-arranged screws. The device can apply radial, deflection and torsion loads to the rubber node at the same time, and radial, deflection and torsion composite working condition tests of the rubber node are achieved.

Description

Technical Field

[0001] The utility model relates to a test device, in particular to a fatigue test device for rubber nodes under combined working conditions. Technical Background

[0002] The rubber node is installed on the bogie of a rail transit train, and can transmit the longitudinal traction force and braking force between the bogie and the car body, and provide the deflection deformation caused by traction, braking and the train turning, as well as the relative rotational movement between the car body and the rear addition caused by the rotation of the bogie. Therefore, the radial fatigue, deflection fatigue and torsional fatigue properties of the rubber node are crucial to the product itself. Therefore, before mass supply, it is necessary to test the fatigue performance of the product to ensure that the performance of the product meets the requirements.

[0003] The utility model patent with the publication number of CN218098706U discloses a fatigue test loading device for rubber nodes, including a frame. Two oil cylinders are arranged in parallel at the upper end of the frame. On the platform below the frame, a pair of clamping blocks are symmetrically supported by a shaft seat and a short shaft respectively below the first oil cylinder; Mandrel sleeves are sleeved at both ends of the rubber node; A cross beam is connected to the lower end of the first oil cylinder through a first connecting shaft. A pair of clamping plates are respectively connected to both ends of the cross beam through flat pin shafts. Two sets of rolling bearings are respectively arranged between each pair of clamping plates. The outer end of the mandrel sleeve is connected to the clamping plate through a flat pin; Two limiting baffles are symmetrically arranged on the platform on both sides of a pair of clamping blocks. The lower parts of the clamping plates are respectively inserted into the corresponding limiting baffles, and the outer edges of the rolling bearings are abutted against the inner walls of the limiting baffles; A transmission shaft is arranged on the platform. One end of the transmission shaft is connected to the corresponding clamping block through a short shaft, and the other end is movably connected to the second oil cylinder through a crank-link mechanism.

[0004] The above device can apply a radial load to the rubber node clamped between a pair of clamping blocks through the expansion and contraction of the first oil cylinder, and can apply a deflection load to the rubber node to be tested through the expansion and contraction of the second oil cylinder, so as to realize the simultaneous action of the radial load and the deflection load on the product itself. However, it cannot realize the combined working condition loading of radial, deflection and torsion on the rubber node, and there is still a certain difference from the actual operating condition of the rubber node, resulting in a certain deviation in the product test results.

[0005] At the same time, due to the limited stroke of the crank-link mechanism, the deflection of the rubber node under some working conditions cannot be realized; moreover, when a large-angle deflection movement is required, due to the movement track of the crank-link mechanism, there will be a certain angle offset of the cylinder rod of the oil cylinder connected to it, which will cause damage to the cylinder rod and affect the service life of the second oil cylinder. Summary of the Utility Model

[0006] The technical problem to be solved by the present utility model is to provide a fatigue test device for a rubber joint under a combined working condition, which can simultaneously apply radial, deflection and torsional loads to the rubber joint to realize the radial, deflection and torsional combined working condition test of the rubber joint.

[0007] To solve the above problems, the present utility model adopts the following technical solutions:

[0008] A fatigue test device for a rubber joint under a combined working condition, including a test platform, on which a frame is fixed. A vertical loading oil cylinder is arranged vertically on the cross beam at the upper end of the frame. The special feature is that a horizontal oil cylinder support is fixed on the test platform on one side of the frame, and a horizontally arranged horizontal loading oil cylinder is fixed on the horizontal oil cylinder support. The axis of the horizontal loading oil cylinder is perpendicular to and intersects with the axis of the vertical loading oil cylinder, and is used to apply deflection and torsional loads to the rubber joint.

[0009] Inside the frame, a vertical loading module is installed below the vertical loading oil cylinder through a support plate. The upper end of the vertical loading module is connected to the output end of the vertical loading oil cylinder, and is used to transmit the radial load applied by the vertical loading oil cylinder to the rubber joint.

[0010] On the test platform, a fatigue test tooling is arranged directly below the vertical loading module, and is used to place the rubber joint to be tested.

[0011] The fatigue test tooling includes a single-axis linear slide arranged on the test platform. A lower support plate is supported on the slide plate of the single-axis linear slide through a disc. On the upper surface of the lower support plate, a transmission plate is installed through two groups of linear sliding components. A support disc is arranged on the transmission plate and fixed by a pressing plate, and is used to support the rubber joint to be tested. A connecting seat is fixed on one side of the transmission plate and is connected to the output end of the horizontal loading oil cylinder.

[0012] The fatigue test tooling also has two groups of clamps. The axes of the two groups of clamps are vertically arranged up and down, and the two groups of clamps are connected to each other by a vertically arranged screw rod to facilitate the installation of the upper and lower rubber joints.

[0013] As a further preference, the vertical loading module includes a guide block. A transmission shaft is slidably installed on the guide block through a linear bearing. The upper end of the transmission shaft is connected to the output end of the vertical loading oil cylinder. A pressing disc is fixedly connected to the lower end of the transmission shaft and is used to press both ends of the mandrel of the rubber joint located above.

[0014] As a further preference, there are two support plates, and both ends are respectively fixed to the inner side of the frame, and the guide block is fixed between the two support plates.

[0015] As a further preference, the single-axis linear slide includes a bottom plate, on which a slide plate is slidably mounted through a slideway. A bolt adjusting assembly is provided on the bottom plate in front of the slide plate, and one end of the bolt of the bolt adjusting assembly is connected to the slide plate. Strip-shaped long holes are respectively provided on both sides of the bottom plate to facilitate fixing on the test platform.

[0016] As a further preference, a circular groove is provided on the bottom surface of the lower supporting plate and sleeved on the upper end of the disc through clearance fit.

[0017] As a further preference, the linear sliding assembly includes a sliding shaft, and both ends of the sliding shaft are respectively fixed on the lower supporting plate through rolling bearings and bearing seats. A sliding seat is mounted on the sliding shaft through a linear bearing, and the sliding seat is fixed on the bottom surface of the transmission plate.

[0018] As a further preference, a conical groove is provided at the center of the upper surface of the transmission plate, and a conical boss is provided on the bottom surface of the support disc and inserted into the conical groove through clearance fit. A stepped central hole is provided on the pressing plate and sleeved on the support disc through clearance fit. The periphery of the pressing plate is connected to the transmission plate through bolts to facilitate pressing the support disc.

[0019] As a further preference, two columns are symmetrically provided on the upper surface of the support disc to facilitate supporting and fixing the rubber node located below.

[0020] As a further preference, two pressing blocks are symmetrically fixed under the pressing disc to facilitate pressing on both ends of the mandrel of the rubber node located above.

[0021] The beneficial effects of the present utility model are as follows:

[0022] 1. By vertically providing a vertical loading oil cylinder on the cross beam at the upper end of the frame, and connecting the upper end of the vertical loading module to the output end of the vertical loading oil cylinder, a radial load can be applied to the rubber node to be tested. Since the transmission plate is installed on the upper surface of the lower supporting plate through two groups of linear sliding assemblies, a support disc is provided on the upper surface of the transmission plate and fixed through a pressing plate for supporting the rubber node to be tested. A connecting seat is fixed on one side of the transmission plate and connected to the output end of the horizontal loading oil cylinder. Therefore, after the support disc rotates by an angle, by driving the transmission plate to reciprocate through the horizontal loading oil cylinder, a deflection and torsional load can be applied to the rubber node to be tested, so as to simultaneously apply radial, deflection and torsional loads to the product itself, better restoring the actual operating conditions of the product and making the test results of this test more instructive.

[0023] 2. Through the vertical loading module and the linear bearings in the linear sliding assembly, the offsets of the vertical loading oil cylinder and the horizontal loading oil cylinder during the loading process can be offset. Secondly, different placement methods can also play a role in fixing the loading direction, making the test results more real and protecting the oil cylinders.

[0024] 3. Two groups of jigs that are vertically arranged up and down and connected to each other by vertically arranged screws clamp the upper and lower two rubber nodes, which can better restore the actual operating conditions of the product and make the test results more accurate. By connecting the two groups of jigs with vertically arranged screws, it can be adjusted according to the requirements of the center distance of different rubber nodes, so that this test equipment can cover most rubber nodes and meet the actual installation requirements.

[0025] 4. Through the single-axis linear slide on the test platform, the basic origin when the horizontal loading oil cylinder drives the transmission plate to reciprocate can be adjusted. Description of the Drawings

[0026] Figure 1 is the installation schematic diagram of the present utility model.

[0027] Figure 2 is Figure 1 the left view of

[0028] Figure 3 is Figure 1 the three-dimensional structure diagram of

[0029] Figure 4 is the installation schematic diagram of the fatigue test tooling of the present utility model and the vertical loading module.

[0030] Figure 5 is Figure 4 the A-A sectional view of

[0031] Figure 6 is Figure 4 the three-dimensional structure diagram of

[0032] In the figure: test platform 1, single-axis linear slide 2, bottom plate 201, slideway 202, slide plate 203, nut 204, adjusting bolt 205, frame 3, vertical loading module 4, guide block 401, transmission shaft 402, pressure plate 403, pressing block 404, support plate 5, jig 6, screw 7, support disc 8, pressing plate 9, transmission plate 10, linear sliding assembly 11, sliding shaft 1101, bearing seat 1102, sliding seat 1103, lower support plate 12, vertical loading oil cylinder 13, horizontal oil cylinder bracket 14, horizontal loading oil cylinder 15, connecting seat 16, rubber node 17, cushion block 18, disc 19. Detailed Implementation Manner

[0033] Such as Figures 1 to 6As shown in the figure, a fatigue test device for a rubber joint under complex working conditions according to the present utility model includes a test platform 1. A plurality of T-shaped grooves are evenly distributed on the test platform 1 to facilitate the fixation of other components above. A gantry frame 3 is fixed on the test platform 1 by bolts. A vertical loading oil cylinder 13 is installed vertically on the cross beam at the upper end of the frame 3. A vertical loading module 4 is installed under the vertical loading oil cylinder 13 in the frame 3 through a support plate 5. The upper end of the vertical loading module 4 is connected to the output end of the vertical loading oil cylinder 13, and is used to transmit the radial load applied by the vertical loading oil cylinder 13 to the rubber joint.

[0034] The vertical loading module 4 includes a guiding block 401. A transmission shaft 402 is slidably installed on the guiding block 401 through a linear bearing. The upper end of the transmission shaft 402 is connected to the output end of the vertical loading oil cylinder 13. A pressure plate 403 is fixedly connected to the lower end of the transmission shaft 402. Two pressure blocks 404 are symmetrically fixed under the pressure plate 403 by bolts to facilitate pressing on both ends of the core shaft of the rubber joint 17 located above. The support plates 5 are two, and both ends are respectively fixed to the inner side of the frame 3. The guiding block 401 is fixed between the two support plates 5 by bolts.

[0035] A vertically arranged horizontal oil cylinder bracket 14 is fixed on the test platform 1 on one side of the frame 3 by bolts. A longitudinal chute is provided on the horizontal oil cylinder bracket 14, and a horizontally arranged horizontal loading oil cylinder 15 is fixed in the longitudinal chute. The horizontal loading oil cylinder 15 intersects perpendicularly with the axis of the vertical loading oil cylinder 13, and is used to apply deflection and torsional loads to the rubber joint.

[0036] A fatigue test tooling is provided directly below the vertical loading module 4 on the test platform 1, and is used to fixedly place the rubber joint to be tested.

[0037] The fatigue test tooling includes a single-axis linear slide 2 provided on the test platform 1. A disc 19 is fixed on the slide plate of the single-axis linear slide 2, and a lower support plate 12 is supported by the disc 19. A transmission plate 10 is installed on the upper surface of the lower support plate 12 through two groups of linear sliding components 11. A support disc 8 is provided on the transmission plate 10 and fixed by a pressure plate 9, and is used to support the rubber joint to be tested. A connecting seat 16 is fixed on one side of the transmission plate 10 and is connected to the output end of the horizontal loading oil cylinder 15 by bolts. A circular groove is provided on the bottom surface of the lower support plate 12 and is sleeved on the upper end of the disc 19 by clearance fit.

[0038] The fatigue test tooling also includes two groups of clamps 6. The axes of the two groups of clamps 6 are vertically arranged up and down, and the two groups of clamps 6 are connected to each other by a vertically arranged screw rod 7 to facilitate the installation of the upper and lower rubber joints 17. Each group of clamps 6 is formed by connecting two clamping blocks arranged symmetrically up and down by bolts.

[0039] The single-axis linear slide 2 includes a bottom plate 201, on which a slideway 202 is provided, and the slide plate 203 is slidably mounted through the slideway. A bolt adjustment assembly is provided on the front side of the slide plate 203 on the bottom plate 201. The nut 204 of the bolt adjustment assembly is fixed on the bottom plate, and one end of the adjustment bolt 205 of the bolt adjustment assembly is connected to the slide plate 203; strip-shaped long holes are respectively provided on both sides of the bottom plate 201 for facilitating fixation on the test platform 1.

[0040] The linear sliding assembly 11 includes a sliding shaft 1101. Both ends of the sliding shaft 1101 are fixed on the lower support plate 12 through rolling bearings and bearing seats 1102. A sliding seat 1103 is mounted on the sliding shaft 1101 through a linear bearing, and the sliding seat 1103 is fixed to the bottom surface of the transmission plate 10.

[0041] A conical groove is provided at the center on the upper surface of the transmission plate 10. A conical boss is provided on the bottom surface of the support disk 8 and is inserted into the conical groove through clearance fit; a stepped central hole is provided on the pressure plate 9 and is sleeved on the support disk 8 through clearance fit. The periphery of the pressure plate 9 is connected to the transmission plate 10 through bolts for facilitating pressing the support disk 8.

[0042] Two columns 801 are symmetrically fixed on the upper surface of the support disk 8 for facilitating the support and fixation of the rubber joints located below.

[0043] During the fatigue test, the operation process is as follows:

[0044] 1. Install the two samples to be tested in the two groups of fixtures 6 respectively. Connect the two ends of the rubber joint located above to the two pressing blocks under the pressing disk 403 through bolts. Connect the two ends of the rubber joint located below to the two columns on the upper surface of the support disk 8 through bolts. The two groups of fixtures 6 are connected to each other through a screw rod.

[0045] 2. Rotate the support disk 8 clockwise by an angle (for example, 35°). After reaching the required angle, lock the pressure plate 9 and the transmission plate 10 through bolts to fix the support disk 8 on the transmission plate 10.

[0046] 3. Rotate the single-axis linear slide 2 clockwise by an angle on the test platform 1, and this angle is the same as the rotation angle of the support disk 8. Rotate the adjustment bolt of the single-axis linear slide 2, drive the fatigue test tooling to generate a lateral displacement through the slide plate of the single-axis linear slide 2, move to the displacement dimension required for the test, and make the sample to be tested at the action origin of the horizontal loading oil cylinder 15; then fix the single-axis linear slide 2 on the test platform 1 by using a cushion block 18 and bolts through the lower support plate 12.

[0047] 4. Control the vertical loading cylinder 13 and the horizontal loading cylinder 15 to start simultaneously. Apply a radial load to the two samples to be tested through the vertical loading cylinder 13, and apply deflection and torsional loads to the rubber node located below through the horizontal loading cylinder 15; continue until the required test duration is reached. Then, the rubber node located below can be removed, visually inspected for appearance, and the static radial stiffness before and after the test can be measured using an electronic universal testing machine, so as to determine whether the fatigue performance of the rubber node product meets the requirements.

[0048] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present invention is not limited to the specific details and the illustrated examples here.

Claims

1. A fatigue test device for a rubber joint under complex working conditions, comprising a test platform, on which a frame is fixed, and a vertical loading oil cylinder is arranged vertically on the cross beam at the upper end of the frame; characterized in that: On the test platform, a horizontal oil cylinder bracket is fixed on one side of the frame. A horizontally arranged horizontal loading oil cylinder is fixed on the horizontal oil cylinder bracket. The axis of the horizontal loading oil cylinder is perpendicular to and intersects with the axis of the vertical loading oil cylinder, and is used to apply deflection and torsional loads to the rubber joint. Inside the frame, a vertical loading module is installed below the vertical loading oil cylinder through a support plate. The upper end of the vertical loading module is connected to the output end of the vertical loading oil cylinder, and is used to transmit the radial load applied by the vertical loading oil cylinder to the rubber joint. On the test platform, a fatigue test tooling is provided directly below the vertical loading module, and is used to place the rubber joint to be tested. The fatigue test tooling includes a uniaxial linear slide installed on the test platform. A lower support plate is supported on the slide plate of the uniaxial linear slide through a disc. A transmission plate is installed on the upper surface of the lower support plate through two groups of linear sliding components. A support disc is provided on the upper surface of the transmission plate and fixed by a pressure plate, and is used to support the rubber joint to be tested. A connecting seat is fixed on one side of the transmission plate and connected to the output end of the horizontal loading oil cylinder. The fatigue test tooling is also provided with two groups of clamps. The axes of the two groups of clamps are vertically arranged up and down, and the two groups of clamps are connected to each other by a vertically arranged screw rod to facilitate the installation of the upper and lower rubber joints.

2. The fatigue test device for a rubber joint under complex working conditions according to claim 1, characterized in that: The vertical loading module includes a guide block. A transmission shaft is slidably installed on the guide block through a linear bearing. The upper end of the transmission shaft is connected to the output end of the vertical loading oil cylinder. A pressure plate is fixedly connected to the lower end of the transmission shaft and is used to press on both ends of the mandrel of the rubber joint located above.

3. The fatigue test device for rubber joints under complex working conditions according to claim 2, characterized in that: There are two support plates, and both ends are respectively fixed to the inner side of the frame. The guide block is fixed between the two support plates.

4. A rubber joint composite working condition fatigue test device according to claim 1, characterized in that: The uniaxial linear slide includes a bottom plate. A slide plate is slidably installed on the bottom plate through a slideway. A bolt adjustment component is provided on the bottom plate in front of the slide plate. One end of the bolt of the bolt adjustment component is connected to the slide plate. Strip-shaped long holes are respectively provided on both sides of the bottom plate to facilitate fixing on the test platform.

5. A rubber node composite working condition fatigue test device according to claim 1 or 4, characterized in that: A circular groove is provided on the bottom surface of the lower support plate and is sleeved on the upper end of the disc through a clearance fit.

6. The fatigue test device for rubber joints under complex working conditions according to claim 5, characterized in that: The linear sliding component includes a sliding shaft. Both ends of the sliding shaft are respectively fixed to the lower support plate through rolling bearings and bearing seats. A sliding seat is installed on the sliding shaft through a linear bearing, and the sliding seat is fixed to the bottom surface of the transmission plate.

7. A rubber node composite working condition fatigue test device according to claim 1 or 6, characterized in that: A conical groove is provided at the center of the upper surface of the transmission plate. A conical boss is provided on the bottom surface of the support disc and is inserted into the conical groove through a clearance fit. A stepped central hole is provided on the pressure plate and is sleeved on the support disc through a clearance fit. The periphery of the pressure plate is connected to the transmission plate by bolts to facilitate pressing the support disc.

8. A rubber joint composite working condition fatigue test device according to claim 7, characterized in that: Two columns are symmetrically provided on the upper surface of the support disc to facilitate supporting and fixing the rubber joint located below.

9. The rubber node composite working condition fatigue test device according to claim 2, characterized in that: Two pressure blocks are symmetrically fixed below the pressure plate to facilitate pressing on both ends of the mandrel of the rubber joint located above.

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