Torsional fatigue test bench for rubber sleeve

Abstract

The invention discloses a rubber sleeve torsional fatigue test bench, and relates to the technical field of rubber sleeves, and the rubber sleeve torsional fatigue test bench comprises a host, the top of the host is provided with a moving assembly, the moving end of the moving assembly is provided with a moving frame, one side, facing the host, in the moving frame is provided with a connecting rod, and the outer side of the bottom of the connecting rod is sleeved with a supporting frame; a pipe clamp A is arranged on the side, away from the moving assembly, of the supporting frame, a driving rotating shaft is arranged on the surface of the main machine, a limiting block is arranged at the top of the driving rotating shaft, a sliding groove is formed in the top of the limiting block, the limiting block is slidably connected with a connecting frame, and a pipe clamp B is arranged on the surface of the connecting frame. The tensile deformation force concentration after the rubber sleeve is fixed is avoided through the fixing assembly, meanwhile, the connecting frame can move along the sliding groove in the mode that the sliding groove in the surface of the limiting block is connected with the connecting frame, an operator can complete staggering of the supporting frame and the connecting frame to generate torsional pendulum without disassembling and assembling the fixing assembly, and the operation steps are simplified.

Description

Technical Field

[0001] The invention relates to the technical field of rubber sleeves, in particular to a rubber sleeve torsional fatigue test bench. Background Art

[0002] In order to evaluate the durability and actual service life of the rubber sleeve, a torsional fatigue testing machine can be used to test the fatigue performance of the rubber sleeve under torsional stress.

[0003] Most of the existing testing machines fix the rubber sleeve by adding a supporting rubber sleeve, and then connect the clamp to the main machine. After adjusting the position of the clamp, the main machine drives the clamp to rotate back and forth, thereby driving the rubber sleeve to twist repeatedly. In actual use, if only the clamp is used, the rubber sleeve may be unevenly deformed when it is clamped by the clamp after placement. The deformation force of the rubber sleeve is relatively concentrated at the clamping position of the rubber sleeve and the clamp, which will cause inaccurate test data and misleading data during the test, affecting the actual test data. At the same time, in actual use scenarios, if the rubber sleeve is twisted, there may be position offsets at both ends. In order to replicate this usage scenario, the relative positions of the two ends of the rubber sleeve will be changed. The existing methods of changing the relative positions of the two ends of the rubber sleeve are mostly through the connection position of the rubber sleeve and the clamp or changing the installation position of the clamp. In either case, the clamp needs to be repeatedly disassembled and assembled, and the overall operation is relatively cumbersome. In addition, if the clamp and the rubber sleeve are separated, it may directly affect the accuracy of the test data. Summary of the Invention

[0004] In response to the above problems, the purpose of the present invention is to provide a rubber sleeve torsional fatigue test bench to solve the problem that the connection method between the sleeve and the fixing device causes the sleeve itself to deform, thereby affecting the final result of the torsional fatigue test. It also solves the problem that the operator needs to disassemble and assemble the fixture when the sleeve is in a torsional state during the torsion process, resulting in a decrease in the accuracy of the final test data.

[0005] The technical solution of the present invention is as follows: a rubber sleeve torsional fatigue test bench includes a main unit with a power device installed inside, a mobile assembly is installed on the top of the main unit, a mobile frame is installed on the mobile end of the mobile assembly, a connecting rod is installed on the side of the mobile frame facing the main unit, a support frame is installed on the outer sleeve of the bottom of the connecting rod, and a pipe clamp A is installed on the side of the support frame away from the mobile assembly; An active rotating shaft is provided on one side of the main machine corresponding to the connecting rod, a limiting block is provided on the top of the active rotating shaft, a sliding groove is provided on the top of the limiting block, and the limiting block is slidably connected to the connecting frame through the sliding groove. A pipe clamp B is provided on the side of the connecting frame away from the moving component, and both pipe clamps A and pipe clamp B clamp fixed components. The two fixed components are arranged facing each other, and a control bolt extending into the sliding groove is inserted on the surface of the limiting block, and the control bolt is threadedly connected to the connecting frame.

[0006] Furthermore, the fixing assembly is composed of an inner column with a shoulder at one end and an outer tube sleeved on the outside of the inner column, wherein a gap is left between the inner column and the outer tube, annular protrusions and threads are respectively provided at both ends of the inner wall of the outer tube, and a smooth chamfer adapted to the annular protrusion is provided on the edge of the other end of the inner column. The inner column and the outer tube are connected by threads, and the rubber sleeve can be sleeved on the outside of the inner column, and then the outer tube is used to connect the inner column with threads to clamp the sleeve wall between the inner column and the outer tube. At the same time, the annular protrusion on the inner wall of the outer tube squeezes the rubber sleeve when it approaches the inner column, thereby strengthening the position fixing effect of the rubber sleeve and making the rubber sleeve remain in a tubular state after being fixed, thereby avoiding uneven deformation of the rubber sleeve when subjected to tension.

[0007] Furthermore, the connecting frame is L-shaped as a whole, wherein the horizontal part of the L-shaped connecting frame is in contact with the limiting block, a protrusion adapted to the slide groove is provided at the bottom of the horizontal part of the connecting frame, and a pipe clamp B is provided on the surface of the vertical part of the connecting frame.

[0008] Furthermore, the slide groove is a groove that passes through the limiting block at the top and on the side close to the moving component, has a bottom diameter larger than the top opening diameter, and has a rectangular cross-section. The protrusion at the bottom of the connecting frame is adapted to the slide groove to ensure that the connection between the connecting frame and the limiting block is stable and the connecting frame will not fall outward in the vertical direction.

[0009] Furthermore, the control bolt is divided into a control part and a connecting part, wherein the connecting part is a circular rod-shaped structure that is laterally inserted into the slide groove along the surface of the limiting block, the surface of the connecting part located inside the slide groove is provided with a thread, and the surface of the connecting part located outside the slide groove is provided with a control part, and the control part is a columnar block structure with friction lines on the cylindrical surface, which ensures that the control bolt will not leave the limiting block when rotating, and at the same time, the control bolt can drive the connecting frame to move when rotating.

[0010] Furthermore, the moving assembly includes an outer frame connected to the main frame and a chain plate exposed to the outside, and a gap is left between the chain plate and the supporting frame and the connecting frame to ensure that the supporting frame and the connecting frame have enough space to rotate.

[0011] Furthermore, a locking bolt abutting the connecting rod is provided on the surface of the support frame, and the support frame is connected to the connecting rod through the locking bolt, so that the connection between the support frame and the connecting rod can be loosened to facilitate the operator to adjust the installation angle of the support frame on the surface of the connecting rod.

[0012] Furthermore, the driving shaft is connected to a power device in the host machine.

[0013] The beneficial effects of the present invention are as follows: 1. The present invention forms a structure through the inner column and the outer tube to clamp and fix the rubber sleeve without squeezing the rubber sleeve, thereby avoiding dispersion of the deformation force applied to the rubber sleeve when it is stretched after being fixed, and avoiding excessive concentration of the deformed part of the rubber sleeve, which leads to inaccurate test results of the torsional fatigue test.

[0014] 2. The present invention also utilizes the sliding groove on the surface of the limiting block to connect with the connecting frame, so that the connecting frame can move along the sliding groove, so that the supporting frame is staggered with the connecting frame in the horizontal direction. When the active rotating shaft rotates, it drives the connecting frame and the supporting frame to generate a torsional swing motion, which does not require the operator to disassemble and assemble the fixed components, thereby simplifying the operating steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 A schematic diagram of the connecting frame and the supporting frame of the present invention; Figure 3 is a schematic diagram of a fixing assembly of the present invention; Figure 4 A schematic diagram of a support frame of the present invention; Figure 5 It is a schematic diagram of the connecting frame of the present invention; Figure 6 It is a schematic diagram of the exploded structure of the connecting frame of the present invention.

[0016] Figure numerals: 1. Main unit; 2. Moving assembly; 3. Moving frame; 4. Connecting rod; 5. Support frame; 6. Pipe clamp A; 7. Fixed assembly; 8. Active rotating shaft; 9. Limiting block; 10. Slide groove; 11. Connecting frame; 12. Pipe clamp B; 13. Control bolt; 71. Inner column; 72. Outer tube; 73. Annular protrusion. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0018] Example 1, as Figure 1-6 As shown, the rubber sleeve torsional fatigue test bench includes a main unit 1 with a power device arranged inside, a moving component 2 arranged on the top of the main unit 1, a moving frame 3 arranged on the moving end of the moving component 2, a connecting rod 4 arranged on the side of the moving frame 3 facing the main unit 1, and an outer sleeve provided with a support frame 5 at the bottom of the connecting rod 4. The surface of the support frame 5 is provided with a locking bolt abutting the connecting rod 4. The support frame 5 is connected to the connecting rod 4 by the locking bolt, so that the connection between the support frame 5 and the connecting rod 4 can be loosened to facilitate the operator to adjust the installation angle of the support frame 5 on the surface of the connecting rod 4, and the support frame 5 is away from the pipe clamp A6 on the side of the moving component 2.

[0019] The main machine 1 is provided with an active shaft 8 on one side of the connecting rod 4, and the active shaft 8 is connected to the power equipment in the main machine 1. A limiting block 9 is provided on the top of the limiting block 9, and a slide 10 is provided on the top of the limiting block 9. The limiting block 9 is slidably connected to the connecting frame 11 through the slide 10. The moving component 2 includes an outer frame connected to the main machine 1 and a chain plate exposed to the outside. There is a gap between the chain plate and the support frame 5 and the connecting frame 11 to ensure that the support frame 5 and the connecting frame 11 have enough space to rotate. The slide 10 is the top and the side close to the moving component 2 that passes through the limiting block 9, and the bottom diameter is larger than the top The groove has an opening diameter and a rectangular cross-section. The protrusion at the bottom of the connecting frame 11 is adapted to the slide 10 to ensure that the connection between the connecting frame 11 and the limiting block 9 is stable, and the connecting frame 11 will not fall out in the vertical direction. A pipe clamp B12 is provided on the side of the connecting frame 11 away from the moving component 2. The connecting frame 11 is L-shaped as a whole, wherein the horizontal part of the L-shaped connecting frame 11 is fitted with the limiting block 9, and a protrusion adapted to the slide 10 is provided at the bottom of the horizontal part of the connecting frame 11. A pipe clamp B12 is provided on the surface of the vertical part of the connecting frame 11, and the fixed component 7 is clamped in the pipe clamp A6 and the pipe clamp B12.

[0020] When locking sill 75 , clamping part 72 is locked, and locking sill 77 is positioned at the top of locking sill 77 in the hinge part 71 of being closed by hinge sill 75, and locking sill 77. When locking sill 75 is locked, clamping part 72 is located in the chest of closure 72 of being closed. The two fixing components 7 are arranged facing each other, and a control bolt 13 extending into the slide groove 10 is inserted on the surface of the limiting block 9. The control bolt 13 is divided into a control part and a connecting part, wherein the connecting part is a circular rod-shaped structure inserted into the slide groove 10 laterally along the surface of the limiting block 9, and the surface of the connecting part located in the slide groove 10 is provided with a thread, and the surface of the connecting part located outside the slide groove 10 is provided with a control part. The control part is a columnar block structure with friction lines on the cylindrical surface, which ensures that the control bolt 13 will not leave the limiting block 9 when rotating. At the same time, the control bolt 13 can drive the connecting frame 11 to move when rotating, and the control bolt 13 is threadedly connected to the connecting frame 11.

[0021] The working principle of the present invention is as follows: first, the operator loosens the pipe clamp A6 and the pipe clamp B12, takes out the fixing assembly 7 clamped in the pipe clamp A6 and the pipe clamp B12, and then separates the fixing assembly 7 to separate the outer tube 72 from the inner column 71. Then, the operator first inserts the inner column 71 into the rubber sleeve, and then uses the outer tube 72 to cover the outside of the rubber sleeve, and moves the outer tube 72 along the rubber sleeve to make the outer tube 72 close to the inner column 71. During the approaching process, the rubber sleeve enters the gap between the outer tube 72 and the inner column 71, and then rotates the outer tube 72. During the process of the outer tube 72 being screwed into the inner column 71 through the thread, the annular protrusion 73 on the inner wall squeezes the rubber sleeve close to the surface of the inner column 71. When the outer tube 72 completes the connection with the inner column 71, the rubber sleeve is clamped and fixed. At this time, the rubber sleeve still maintains its own shape and will not be deformed by the fixing method, affecting subsequent tests.

[0022] Then, the fixing assembly 7 is installed again through the pipe clamps A6 and B12. The operator can adjust the distance between the two fixing assemblies 7 by adjusting the position of the movable frame 3 in the movable assembly 2, thereby adjusting the tension on the rubber sleeve. Then, the power equipment in the main machine 1 drives the active rotating shaft 8 to rotate cyclically. During the rotation, the connecting frame 11 is driven to rotate along with it through the limiting block 9, so that the fixing assembly 7 in the pipe clamp B12 twists the rubber sleeve.

[0023] When torsion swing is required, the operator can rotate the control bolt 13 to move the connecting frame 11 threadedly connected to the control bolt 13 along the slide groove 10, thereby changing the relative positions of the two fixing components 7, so that the connecting frame 11 can rotate and perform arc motion with the active rotating shaft 8 to torsion swing, avoiding the operator from repeatedly disassembling and assembling the fixing structure of the rubber sleeve and simplifying the operating steps.

[0024] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0025] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. The rubber sleeve torsional fatigue test bench includes a main unit with a power device inside and a moving component on the top of the main unit, and is characterized by: The movable end of the movable assembly is provided with a movable frame, and a connecting rod is provided on the side of the movable frame facing the main machine, and a support frame is provided at the bottom of the connecting rod. A pipe clamp A is provided on the side of the support frame away from the movable assembly; an active rotating shaft is provided on the side of the main machine corresponding to the connecting rod, and a limiting block is provided on the top of the active rotating shaft. A sliding groove is provided on the top of the limiting block, and the limiting block is slidably connected to the connecting frame through the sliding groove. A pipe clamp B is provided on the side of the connecting frame away from the movable assembly, and fixed components are clamped in the pipe clamps A and B. The two fixed components are arranged facing each other, and a control bolt extending into the sliding groove is inserted on the surface of the limiting block, and the control bolt is threadedly connected to the connecting frame.

2. The rubber sleeve torsional fatigue test bench according to claim 1 is characterized in that: The fixing assembly consists of an inner column with a shoulder at one end and an outer tube sleeved on the inner column, wherein a gap is left between the inner column and the outer tube, an annular protrusion and a thread are respectively provided at both ends of the inner wall of the outer tube, and a smooth chamfer adapted to the annular protrusion is provided on the edge of the other end of the inner column, and the inner column and the outer tube are connected by threads.

3. The rubber sleeve torsional fatigue test bench according to claim 1 is characterized in that: The connecting frame is L-shaped as a whole, wherein the horizontal part of the L-shaped connecting frame is in contact with the limiting block, a protrusion adapted to the slide groove is provided at the bottom of the horizontal part of the connecting frame, and a pipe clamp B is provided on the surface of the vertical part of the connecting frame.

4. The rubber sleeve torsional fatigue test bench according to claim 3 is characterized in that: The slide groove is a groove that passes through the limiting block at the top and the side close to the moving component, has a bottom diameter larger than the top opening diameter, and has a rectangular cross section. The protrusion at the bottom of the connecting frame is adapted to the slide groove.

5. The rubber sleeve torsional fatigue test bench according to claim 4 is characterized in that: The control bolt is divided into a control part and a connecting part, wherein the connecting part is a circular rod-shaped structure that is laterally inserted into the slide groove along the surface of the limiting block. The surface of the connecting part located inside the slide groove is provided with a thread, and the part of the connecting part located outside the slide groove is provided with a control part. The control part is a cylindrical block structure with friction lines on the cylindrical surface.

6. The rubber sleeve torsional fatigue test bench according to claim 1 is characterized in that: The moving assembly includes an outer frame connected to the main frame and a chain plate exposed to the outside, and a gap is left between the chain plate and the supporting frame and the connecting frame.

7. The rubber sleeve torsional fatigue test bench according to claim 1 is characterized in that: The surface of the support frame is provided with a locking bolt that abuts against the connecting rod, and the support frame is connected to the connecting rod through the locking bolt.

8. The rubber sleeve torsional fatigue test bench according to claim 1 is characterized in that: The active rotating shaft is connected to a power device in the main engine.

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