A rubber wear resistance testing device

Abstract

The present invention relates to the technical field of rubber testing equipment, and specifically discloses a rubber wear resistance testing device, comprising a main structure, a friction structure and a fixed structure; the friction structure is fixedly arranged on the main structure, the main structure can drive the friction structure to rise and fall, sandpaper can be detachably installed on the friction structure, and the friction structure can change the shape of the sandpaper, the fixed structure is fixedly arranged on the main structure and is located below the friction structure, the fixed structure can contact the sandpaper on the friction structure, and the fixed structure is used to fix the rubber. The present invention integrates multiple testing functions into one, and can complete multiple types of plane, arc, rotation and other wear resistance tests without additional replacement of equipment components, significantly reducing the testing cost and improving the testing efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of rubber testing equipment, in particular to a rubber wear resistance performance testing device. Background Art

[0002] In the field of rubber testing equipment, existing equipment typically only achieves fixed friction between a sandpaper surface and rubber, failing to simulate the complex bending and arc-shaped contact conditions rubber may face in real-world applications. Consequently, test results fail to fully reflect the rubber's wear resistance under multiple angles and shapes. Traditional devices lack precise pressure detection and feedback mechanisms, making it difficult to conduct wear tests under varying loads and failing to meet the demand for precise control of pressure parameters in scientific research and production. Summary of the Invention

[0003] The purpose of the present invention is to provide a rubber wear resistance testing device to solve the problems existing in the prior art of existing rubber wear resistance testing equipment, such as single friction form, rough pressure control, limited fixing method, and insufficient structural flexibility. Therefore, a wear resistance testing device is provided that can realize dynamic adjustment of the shape of sandpaper and rubber test pieces, precise pressure monitoring, multi-form fixation of rubber and multi-angle testing, so as to comprehensively improve the accuracy and applicability of rubber wear resistance testing.

[0004] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a rubber wear resistance testing device, comprising a main structure, a friction structure and a fixed structure; the friction structure is fixedly arranged on the main structure, the main structure can drive the friction structure to rise and fall, sandpaper can be detachably installed on the friction structure, and the friction structure can change the shape of the sandpaper, the fixed structure is fixedly arranged on the main structure and is located below the friction structure, the fixed structure can contact the sandpaper on the friction structure, and the fixed structure is used to fix the rubber.

[0005] Preferably, the friction structure includes a fixing unit, a pair of first supporting units and a plurality of second supporting units; the fixing unit is fixedly arranged on the main structure, a pair of the first supporting units are symmetrically arranged in the middle of the fixing unit, and a plurality of the second supporting units are equidistantly arranged on the left and right sides of the first supporting unit, and the plurality of the second supporting units have the same structure as the first supporting unit, wherein the fixing unit is used to fix the sandpaper and apply force to both ends of the sandpaper, the first supporting unit is used to stabilize the middle of the sandpaper in the fixing unit, and the second supporting unit is used to limit both ends of the sandpaper, so that the sandpaper can be stably bent and flattened along the arc.

[0006] Preferably, the fixing unit includes a spring plate, two pairs of screws, a pair of pressure plates, two pairs of clamping arms, two pairs of second hydraulic cylinders and two pairs of first flip seats; the spring plate is rectangular, and the lower walls at both ends of the spring plate are symmetrically provided with pressure grooves, the spring plate can be bent, one end of the two pairs of screws are movably screwed on the upper wall of the spring plate near the four corners, the two pairs of screws are respectively connected to the pressure grooves, a pair of pressure plates are respectively movably embedded in the pressure grooves, and the pressure plates are respectively movably connected to the screws, and the screws can rotate on the pressure plates, one end of the two pairs of clamping arms are respectively fixedly provided on the left and right ends of the spring plate and respectively correspond to the four corners, the telescopic ends of the two pairs of the second hydraulic cylinders are respectively movably connected to the other end of the clamping arms, the two pairs of the first flip seats are respectively movably clamped on the second hydraulic cylinders, and the first flip seats are respectively fixed on the main structure.

[0007] Preferably, the first support unit includes a spring frame, a force-bearing rod, a pressure detector, a first spring and a third hydraulic cylinder; the spring frame is a rectangular frame, one end of the force-bearing rod is movable through the middle of the lower wall of the spring frame, and the other end of the force-bearing rod is fixedly connected to the upper wall of the spring plate, the pressure detector is fixedly arranged in the middle of the upper wall of the spring frame, the first spring is fixedly arranged between one end of the force-bearing rod and the pressure detector, the telescopic end of the third hydraulic cylinder is fixedly arranged on the upper wall of the spring frame, and the other end of the third hydraulic cylinder is fixedly arranged on the main structure.

[0008] Preferably, the third hydraulic cylinder in the first supporting unit is fixedly connected to the spring frame, and the third hydraulic cylinder in the second supporting unit is movably connected to the spring frame.

[0009] Preferably, as a preferred solution, further, the fixing structure includes a rotating unit and a pair of clamping units; the rotating unit is fixedly arranged on the base, and the pair of clamping units are symmetrically arranged on the rotating unit, and the clamping units are respectively located on the front and rear sides of the spring plate, the rotating unit is used to drive the clamping unit to rotate, and the clamping unit is used to fix the rubber.

[0010] The driving mechanism that the cam is connected with the motor is that the cam interlockingly connects the motor and the control mechanism, and the transmission mechanism is that the cam interlockingly connects the motor and the control mechanism, and the transmission mechanism is that the cam interlockingly connects the motor and the control mechanism, and the transmission mechanism is that the cam interlockingly connects the motor and the control mechanism.

[0011] Preferably, the clamping unit includes a first clamping frame, a second clamping frame, a pair of racks, a second motor and a gear; both ends of the first clamping frame are movable through one of the pairs of lifting slots at both ends of the rotating frame and are located above the rotating frame, the middle part of the first clamping frame is a semicircular structure, and the first clamping frame can be buckled on the arch platform, the two ends of the second clamping frame are movable through the other pair of lifting slots at both ends of the rotating frame, the second clamping frame is located below the rotating frame, and the second clamping frame is staggered with the first clamping frame, a pair of the racks are respectively arranged on one end of the first clamping frame and one end of the second clamping frame, and the racks are staggered relative to each other, the second motor is fixedly embedded in the side wall of one end of the rotating frame and is located between the racks, the gear is fixedly sleeved on the driving end of the second motor, and the gears are respectively engaged with the racks.

[0012] Preferably, the height at which the first clamping frame and the second clamping frame are connected is smaller than the height of the rotating frame.

[0013] The present invention proposes a device for testing the wear resistance of rubber. Compared with traditional friction testing equipment, the present invention has the following beneficial effects:

[0014] 1. Multi-morphological friction simulation: The sandpaper shape is adjustable. The fixed unit (spring plate, second hydraulic cylinder) and the supporting unit (first supporting unit and second supporting unit) in the friction structure work together to enable the sandpaper to quickly switch between three shapes: flat, downward convex arc, and upward convex arc. For example, the flat shape is suitable for flat friction tests (such as rubber floor wear resistance testing); the downward convex arc can simulate the wear of rubber when it is compressed and bent (such as tire shoulder bending conditions); and the upward convex arc can adapt to the fitting friction of arched rubber surfaces (such as seal curved surface wear testing). The rotating unit (first motor, rotating shaft) in the fixed structure can drive the rubber to rotate, and combined with the translation or shape change of the sandpaper, multi-angle dynamic wear simulation (such as tire rolling friction scenarios) can be achieved.

[0015] 2. Precise pressure detection and control: The first support unit has a built-in pressure detector and the first spring, which can monitor the pressure applied by the sandpaper on the rubber in real time. The limit height of the support unit is adjusted by the third hydraulic cylinder, and the deformation of the spring plate is coordinated to achieve precise friction testing under different loads, providing quantitative data support for material performance analysis.

[0016] 3. Adapt to diverse testing requirements: The clamping unit drives the first and second clamping frames to move synchronously in opposite directions through a rack and pinion mechanism, which can achieve:

[0017] Flat clamping: The rubber is fixed to the fixed table plane through the second clamping frame, which is suitable for flat specimens;

[0018] Arc clamping: With the detachable arch table, the rubber is fixed into an arc shape through the first clamping frame to simulate the actual deformation state (such as the curvature of the tire tread).

[0019] Quick-switch design: The arched table is connected to the fixed table via a sliding slot, allowing for quick disassembly or repositioning. Combined with the rotating frame's bearing structure, this significantly improves test mode switching efficiency.

[0020] 4. Stable and reliable structure: The combination of the bidirectional slide rail and the first hydraulic cylinder realizes the smooth lifting and translation of the friction structure. The power rod reduces the impact of lateral movement on the hydraulic cylinder, ensuring the position accuracy during the friction process. The support unit is linked with the force rod and the spring frame to make the sandpaper evenly stressed during deformation, avoiding test deviation caused by local stress concentration and improving the repeatability of the results.

[0021] In summary, the present invention integrates multiple testing functions into one, and can complete various types of wear resistance testing such as plane, arc, and rotation without the need to replace additional equipment components, thereby significantly reducing testing costs and improving testing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the assembly structure of the present invention;

[0023] Figure 2 for Figure 1 Schematic diagram of the local structure in;

[0024] Figure 3 This is a schematic diagram of the split structure of the main structure of the present invention;

[0025] Figure 4 This is a schematic diagram of the assembly structure of the friction structure of the present invention;

[0026] Figure 5 This is a schematic diagram of the split structure of the fixed structure of the present invention;

[0027] Figure 6 This is a schematic diagram of the fixed structure assembly structure of the present invention;

[0028] Figure 7 for Figure 4 A local enlarged structural diagram in FIG.

[0029] Figure 8 for Figure 5 Schematic diagram of the local enlarged structure at point B in the figure.

[0030] In the figure: 1. main structure, 11. base, 12. bidirectional slide rail, 13. main mounting plate, 14. first hydraulic cylinder, 15. load-bearing plate, 16. power rod, 2. fixing unit, 21. spring plate, 22. screw, 23. pressure plate, 24. clamping arm, 25. second hydraulic cylinder, 26. first flip seat, 3. first supporting unit, 31. spring frame, 32. force rod, 33. pressure detector, 34. first spring, 35. third hydraulic cylinder, 4. second supporting unit, 5. rotating unit, 51. rotating frame, 52. first motor, 53. rotating shaft, 54. fixed table, 55. arched table, 6. clamping unit, 61. first clamping frame, 62. second clamping frame, 63. rack, 64. second motor, 65. gear, 7. lifting slot, 8. sliding slot, 9. plug leg. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] See also Figures 1-8 The present invention provides a technical solution: a rubber wear resistance testing device, comprising a main structure 1, a friction structure and a fixed structure; the friction structure is fixedly arranged on the main structure 1, and the main structure 1 can drive the friction structure to rise and fall, and sandpaper can be detachably installed on the friction structure, and the friction structure can change the shape of the sandpaper, for example: flat, bent, the fixed structure is fixedly arranged on the main structure 1 and is located below the friction structure, the fixed structure can contact with the sandpaper on the friction structure, and the fixed structure is used to fix the rubber.

[0033] As a preferred solution, further, the main structure 1 includes a base 11, a two-way slide rail 12, a main mounting plate 13, a pair of first hydraulic cylinders 14, a bearing plate 15 and a pair of power rods 16; the lifting end of the two-way slide rail 12 is fixedly arranged at the middle of the upper wall of the right end of the base 11, and the translation end of the two-way slide rail 12 is located above the base 11 and parallel, the main mounting plate 13 is fixedly arranged on the translation end of the two-way slide rail 12, a pair of first hydraulic cylinders 14 are symmetrically arranged at the middle of the lower wall of the left and right ends of the main mounting plate 13, both ends of the bearing plate 15 are fixedly arranged on the telescopic end of the first hydraulic cylinder 14, one end of a pair of power rods 16 are symmetrically arranged on the upper wall of the bearing plate 15, and the other end of the power rods 16 are movable through the main mounting plate 13; supported by the base 11, the main mounting plate 13 is driven to move up and down and left and right by the two-way slide rail 12, and the bearing plate 15 is driven to move up and down by the first hydraulic cylinder 14.

[0034] More specifically, the base 11 provides overall support, and the bidirectional slide rail 12 can drive the main mounting plate 13 to achieve vertical lifting and horizontal left and right movement, thereby adjusting the position of the friction structure (such as sandpaper) in three-dimensional space; the first hydraulic cylinder 14 drives the supporting plate 15 to rise and fall through telescopic action, accurately controlling the contact distance between the friction structure and the fixed structure below; the power rod 16 passes through the main mounting plate 13 to form a sliding guide structure, which offsets the lateral displacement force during the movement of the supporting plate 15, reduces the lateral load borne by the first hydraulic cylinder 14, and improves the stability and precision of the friction structure during movement.

[0035] As a preferred solution, further, the friction structure includes a fixed unit 2, a pair of first support units 3 and several second support units 4, the fixed unit 2 is fixedly arranged on the lower wall of the supporting plate 15, a pair of first support units 3 are symmetrically arranged in the middle of the fixed unit 2, and several second support units 4 are equidistantly arranged on the left and right sides of the first support unit 3, and several second support units 4 have the same structure as the first support unit 3, wherein the third hydraulic cylinder 35 in the first support unit 3 is fixedly connected to the spring frame 31, and the third hydraulic cylinder 35 in the second support unit 4 is movably connected to the spring frame 31, wherein the fixed unit 2 is used to fix the sandpaper and apply force to both ends of the sandpaper, the first support unit 3 is used to stabilize the middle of the sandpaper in the fixed unit 2, and the second support unit 4 is used to limit the two ends of the sandpaper, so that the sandpaper can be stably bent and flattened along the arc.

[0036] More specifically, through the coordinated action of the fixing unit 2 and the first support unit 3 and the second support unit 4, the sandpaper shape (flat and bent) can be flexibly switched to meet the wear resistance test requirements under different working conditions; the first support unit 3 and the second support unit 4 are connected by the third hydraulic cylinder 35 in a differentiated design (fixed connection or movable connection) to achieve a mechanical balance between stable support in the middle of the sandpaper and flexible limitation at both ends, ensuring that the sandpaper is uniformly stressed and the curvature is controllable when deformed, thereby improving the test accuracy and reliability.

[0037] As a preferred solution, further, the fixing unit 2 includes a spring plate 21, two pairs of screws 22, a pair of pressure plates 23, two pairs of clamping arms 24, two pairs of second hydraulic cylinders 25 and two pairs of first flip seats 26; the spring plate 21 is rectangular, and the lower walls of the left and right ends of the spring plate 21 are symmetrically provided with pressure grooves, the spring plate 21 can be bent, one end of the two pairs of screws 22 are movably screwed to the upper wall of the spring plate 21 and close to the four corners, the two pairs of screws 22 are respectively connected to the pressure grooves, a pair of pressure plates 23 are respectively movably embedded in the pressure grooves, and the pressure plates 23 are respectively movably connected to the screws 22, and the screws 22 can The spring plate 21 can be rotated on the pressure plate 23. One end of the two pairs of clamping arms 24 is respectively fixedly arranged on the left and right ends of the spring plate 21 and respectively close to the four corners. The telescopic ends of the two pairs of second hydraulic cylinders 25 are respectively movably connected to the other end of the clamping arms 24. The two pairs of first flip seats 26 are respectively movably mounted on the second hydraulic cylinders 25, and the first flip seats 26 are respectively fixedly arranged on the lower wall of the bearing plate 15. Through the bendability of the spring plate 21, the spring plate 21 is relatively bent with the help of the second hydraulic cylinder 25, and the pressure plate 23 is driven to move by the screw 22. With the help of the pressure plate 23, the two ends of the sandpaper can be compacted and fixed.

[0038] More specifically, by rotating the screw 22, the pressure plate 23 is driven to move in the pressure groove, so that the two ends of the sandpaper can be pressed and fixed in the pressure groove of the lower wall of the spring plate 21, so that the sandpaper can be quickly clamped and disassembled; the second hydraulic cylinder 25 drives the left and right ends of the spring plate 21 to bend upward or downward synchronously through the telescopic action with the help of the clamping arm 24, and at the same time the first flip seat 26 provides a rotating fulcrum for the second hydraulic cylinder 25, so that the spring plate 21 can flexibly change the curvature; it provides a variety of friction surface shape options for rubber wear resistance testing, and improves the applicability and flexibility of the detection device.

[0039] As a preferred solution, further, the first support unit 3 includes a spring frame 31, a force rod 32, a pressure detector 33, a first spring 34 and a third hydraulic cylinder 35; the spring frame 31 is a rectangular frame, one end of the force rod 32 is movable through the middle of the lower wall of the spring frame 31, and the other end of the force rod 32 is fixedly connected to the upper wall of the spring plate 21, the pressure detector 33 is fixedly arranged in the middle of the inner upper wall of the spring frame 31, the first spring 34 is fixedly arranged between one end of the force rod 32 and the pressure detector 33, the telescopic end of the third hydraulic cylinder 35 is fixedly arranged on the upper wall of the spring frame 31, and the other end of the third hydraulic cylinder 35 is fixedly arranged on the lower wall of the bearing plate 15; the height of the spring frame 31 and the force rod 32 is adjusted by the telescopic third hydraulic cylinder 35, and different height limits are set for different positions of the spring plate 21, so that the spring plate 21 is bent into an arc of a certain diameter, and the pressure applied by the spring plate 21 relative to the rubber is detected by the pressure detector 33.

[0040] More specifically, the vertical height of the spring frame 31 and the force-bearing rod 32 can be adjusted through the telescopic action of the third hydraulic cylinder 35, thereby forming limit supports of different heights for the corresponding positions of the spring plate 21; when the spring plate 21 is driven to bend by the second hydraulic cylinder 25, the force-bearing rod 32 moves synchronously with the spring plate 21 and compresses the first spring 34, and the elastic force of the first spring 34 is transmitted to the pressure detector 33 through the force-bearing rod 32, so that the spring plate 21 is stably bent into an arc of a specific diameter; the pressure detector 33 monitors the compressive force of the first spring 34 in real time, and converts it into the force applied by the spring plate 21 on the rubber sample, thereby realizing the quantitative detection and feedback control of the pressure parameters during the friction process, and providing data support for wear resistance testing.

[0041] As a preferred solution, further, the fixed structure includes a rotating unit 5 and a pair of clamping units 6. The rotating unit 5 is fixedly arranged on the base 11, and the pair of clamping units 6 are symmetrically arranged on the rotating unit 5, and the clamping units 6 are respectively located on the front and rear sides of the spring plate 21. The rotating unit 5 is used to drive the clamping unit 6 to rotate, and the clamping unit 6 is used to fix the rubber.

[0042] As a preferred solution, further, the rotating unit 5 includes a rotating frame 51, a first motor 52, a rotating shaft 53, a fixed platform 54 and an arched platform 55; the rotating frame 51 is concave, and bearings are embedded in both ends of the rotating frame 51. The rotating frame 51 is fixedly arranged on the upper wall of the base 11 and is located in the middle of the rear end. The first motor 52 is fixedly arranged on the rotating frame 51 and the driving end of the first motor 52 corresponds to the center of the bearing. One end of the rotating shaft 53 is fixedly passed through the middle of the bearing at both ends of the rotating frame 51, and one end of the rotating shaft 53 is connected to the driving end of the first motor 52. The other end of the rotating shaft 53 is located at the front side of the rotating frame 51. The fixed platform 54 is I-shaped and has four ends. The middle part of the fixed platform 54 is fixedly set on the other end of the rotating shaft 53 and the fixed platform 54 is located opposite to the spring plate 21. A pair of lifting grooves 7 are symmetrically opened on the side walls of the four bottom ends of the fixed platform 54. A pair of penetrating sliding grooves 8 are opened in parallel in the middle of the upper wall of the fixed platform 54. A pair of plug legs 9 that fit into the sliding grooves 8 are symmetrically set on the lower wall of the arched platform 55. The arched platform 55 is detachably placed on the upper wall of the fixed platform 54 through a socket, and the plug legs 9 are inserted into the sliding grooves 8; the rotating shaft 53 is driven to rotate on the rotating frame 51 by the first motor 52, so that the fixed platform 54 is rotated to change the surface or rotate. The rubber can be changed in shape through the arched platform 55 for various tests.

[0043] More specifically, the first motor 52 drives the rotating shaft 53 to rotate in the bearing of the rotating frame 51, driving the fixed platform 54 to rotate synchronously, thereby realizing the surface changing or continuous rotation of the rubber sample on the fixed platform 54, simulating a dynamic wear scenario, and the arched platform 55 is detachably mounted on the fixed platform 54 through the cooperation of the plug legs 9 and the sliding groove 8. Its arc-shaped structure can fix the rubber sample in an arched deformation state, which is suitable for curved surface wear resistance testing; the lifting groove 7 of the fixed platform 54 provides a sliding guide for the clamping unit 6, which is convenient for coordinating with the spatial position of the friction structure, realizing the expansion of the rotation test and shape fixation function of the rubber sample, supporting multi-angle wear detection of flat samples, and simulating the bending conditions of rubber in actual applications, significantly improving the adaptability of the detection device to complex working conditions.

[0044] As a preferred solution, further, the clamping unit 6 includes a first clamping frame 61, a second clamping frame 62, a pair of racks 63, a second motor 64 and a gear 65; the two ends of the first clamping frame 61 are movable through one of the pairs of lifting slots 7 at the two ends of the rotating frame 51, and are located above the rotating frame 51, the middle part of the first clamping frame 61 is a semicircular structure, and the first clamping frame 61 can be buckled on the arched platform 55, the two ends of the second clamping frame 62 are movable through the other pair of lifting slots 7 at the two ends of the rotating frame 51, the second clamping frame 62 is located below the rotating frame 51, and the second clamping frame 62 corresponds to the first clamping frame 61 in an alternating manner, and a pair of gears are provided. The racks 63 are respectively arranged on one end of the first clamping frame 61 and one end of the second clamping frame 62, and the racks 63 are staggered and opposite to each other. The second motor 64 is fixedly embedded in the side wall of one end of the rotating frame 51 and is located between the racks 63. The gear 65 is fixedly sleeved on the driving end of the second motor 64, and the gears 65 are respectively engaged with the racks 63; the second motor 64 drives the gear 65 to rotate, thereby realizing the staggered movement of the two racks 63, and then drives the first clamping frame 61 and the second clamping frame 62 that are staggered and oppositely arranged to move in the opposite direction or relative to each other, thereby realizing synchronous control of the clamping of the first clamping frame 61 and the second clamping frame 62.

[0045] More specifically, when the second motor 64 drives the gear 65 to rotate, the gear 65 drives the two racks 63 to move in opposite directions through the meshing relationship, and then drives the staggered first clamp 61 and the second clamp 62 to move synchronously in opposite directions. The relative movement of the first clamp 61 and the second clamp 62, the semicircular structure in the middle of the first clamp 61, is suitable for arc fixation, or the second clamp 62 supports the rubber sample on the fixed table 54, which is suitable for flat fixation; multi-angle wear resistance testing of samples of different shapes is realized, thereby improving detection efficiency and applicability.

[0046] As a preferred solution, further, the height at which the first clamping frame 61 and the second clamping frame 62 are connected is smaller than the height of the rotating frame 51 , so as to meet the rotation requirement of the fixing platform 54 .

[0047] The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process. The specific work is as follows.

[0048] With the base 11 in the main structure 1 stably placed and the device powered on, the test rubber pad can be installed on the wall of the fixed platform 54 in the rotating unit 5 according to the test requirements, and the first clamping frame 61 in the clamping unit 6 can be selected to compact and fix the two ends or the second clamping frame 62 can be selected to compact and fix the two ends; the rotating unit 5 can drive the rubber to rotate the side wall, and the main structure 1 can drive the sandpaper in the fixed unit 2 to move, and different tests can be performed by changing the shape of the sandpaper with the help of the fixed unit 2;

[0049] Installation of sandpaper: Insert the two ends of the existing sandpaper between the pressing plate 23 and the spring plate 21, and rotate the screw 22 to move the pressing plate 23 closer to the spring plate 21 to clamp the two ends of the sandpaper for fixation;

[0050] 1. For example: friction test of rubber pads: by placing the rubber pad on the lower wall of the fixed platform 54, and driving the second motor 64 in the clamping unit 6 to drive the gear 65 to rotate, the rack 63 is staggered, and then the first clamping frame 61 and the second clamping frame 62 are driven to move relative to each other in the lifting slot 7, and the rubber pad is clamped on the fixed platform 54 by the second clamping frame 62; then by driving the first motor 52 in the rotating unit 5, the rotating shaft 53 is driven to rotate on the rotating frame 51, and the direction of the fixed platform 54 is adjusted to promote The rubber pad is horizontally facing upwards, and at this time the first clamping frame 61 and the arched platform 55 are located below the fixed platform 54; the bidirectional slide rail 12 can be driven to drive the main mounting plate 13 to move up and down, or the first hydraulic cylinder 14 on the main mounting plate 13 can be extended to drive the bearing plate 15 to descend to a certain height, so that the sandpaper on the lower wall of the spring plate 21 in the fixed unit 2 is lowered to contact the rubber pad; the sandpaper is installed by passing the two ends of the sandpaper through between the pressure plate 23 and the spring plate 21, and rotating the screw 22 to embed the pressure plate 23 into the pressure groove to fix the sandpaper.

[0051] Test effect: by laying the rubber pad flat, the sandpaper laid on the lower wall of the spring plate 21 can be lowered to contact the rubber pad to apply plane force, and then the sandpaper is driven to move left and right with the help of the two-way slide rail 12 to perform a friction test. During the left and right movement, the force applied by the power rod 16 is used to reduce the lateral force applied to the first hydraulic cylinder 14 by the left and right movement, thereby providing protection; by extending and retracting the first support unit 3, the second support unit 4 and the second hydraulic cylinder 25 in the fixed unit 2, the contact pressure between the spring plate 21 and the rubber pad in the horizontal state is adjusted, and the pressure will pass through the spring frame 31 through the force rod 32 to compress the first spring 34, and then with the help of the second hydraulic cylinder 25 in the second support unit 3 A spring 34 buffers the pressure applied to the pressure detector 33 for detection, thereby realizing friction testing under different pressures; through the contraction of the first hydraulic cylinder 14 in the fixing unit 2, the left and right ends of the spring plate 21 are driven to bend upward with the help of the clamping arm 24, and the second hydraulic cylinder 25 will be flipped to a certain angle with the help of the first flip seat 26; and the third hydraulic cylinder 35 in the first supporting unit 3 and the second supporting unit 4 located on the upper wall of the spring plate 21 telescopically adjusts the limit height of the spring plate 21 at different positions, so that the spring plate 21 is subjected to force to form an arch on the lower wall, and then the contact force test is performed on the flat rubber pad through the arched sandpaper.

[0052] For example, the rubber pad is fixed to the arched platform 55 provided in the sliding groove 8 by the plug leg 9 through the first clamping frame 61, and the rubber pad is fixed into an arched shape by means of the arched platform 55, causing the rubber pad to deform. Then, similar to the above operation, the arched rubber pad wall surface can be tested by moving the sandpaper in a flat state, and the reverse arched contact test can be achieved by forming the sandpaper into a downwardly convex arc wall surface. The spring plate 21 can be changed to an upwardly convex arc, and the sandpaper can be buckled onto the arched rubber pad to fit the changed sandpaper. Then, the rubber pad can be driven to rotate by the first motor 52 to achieve a friction test.

[0053] When the shape of the sandpaper needs to be changed, for example, to be turned into a downward convex arc, the second hydraulic cylinder 25 is activated to retract, and the clamping arms 24 at the telescopic ends of the second hydraulic cylinder 25 drive the two ends of the spring plate 21 to flip upward. When the two ends of the spring plate 21 flip upward and tilt upward, the first supporting unit 3 and the second supporting unit 4 are provided in the middle of the upper wall of the spring plate 21, so that multiple locations form fulcrums, and the spring frame 31 in the first supporting unit 3 located in the middle cannot flip with the third hydraulic cylinder 35, while the spring frame 31 in the second supporting unit 4 located near the two ends of the spring plate 21 can flip relative to the third hydraulic cylinder 35 at a certain angle.

[0054] Therefore, by controlling the extension and contraction of the third hydraulic cylinder 35 in the first supporting unit 3 in the middle, the vertical middle fulcrum is changed. By adjusting the third hydraulic cylinder 35 in the second supporting unit 4, when the fulcrum is adjusted, the flip angles of the two ends of the spring plate 21 change more than that of the middle part. Therefore, the corresponding spring frame 31 and the third hydraulic cylinder 35 will flip to a certain angle to match the flipping.

[0055] Then, the support height of the first supporting unit 3 and the second supporting unit 4 is changed, thereby limiting the bending of the spring plate 21, causing the spring plate 21 to form a downward convex arc, thereby driving the sandpaper to change from its original horizontal state;

[0056] Based on the same principle, reverse driving can realize the upward bulge of the spring plate 21 to form an arched state, and the sandpaper will also form an arched state, which can be buckled on the arched rubber for testing;

[0057] The sandpaper is horizontal and flatly laid to apply friction. The second hydraulic cylinder 25 is used to keep both ends of the spring plate 21 horizontal. At the same time, the support heights of the first support unit 3 and the second support unit 4 are controlled to be the same as the second hydraulic cylinder 25, so that the spring plate 21 can be limited to a horizontal position.

[0058] The fixed state of the rubber to be tested is determined by fixing the rubber on the arched platform 55 installed on the upper wall of the fixed platform 54 according to the test requirements, so that the rubber is clamped in an arched shape. If the fixed platform 54 is rotated 180 degrees, the arched platform 55 is located below the fixed platform 54, and the upper wall of the fixed platform 54 is now a horizontal wall, so the flat rubber test can be performed.

[0059] To sum up, through the linkage between the fixed unit 2 and the first support unit 3 and the second support unit 4, the sandpaper can be switched between three forms: flat, downward convex arc, and upward convex arc, covering multi-form wear resistance tests such as plane, bending, and extrusion; the first support unit 3 and the second support unit 4 have built-in pressure detectors 33 and first springs 34, which provide real-time feedback on friction pressure, and combine with the third hydraulic cylinder 35 to adjust the limit height to achieve quantitative testing under different loads; the clamping unit 6 supports flat and arc clamping, and the rotating unit 5 drives the rubber part to rotate in a circle, simulating dynamic wear scenarios in actual use and improving the comprehensiveness of the test; the power rod 16 enhances the moving stability of the main structure 1, and the detachable arch platform 55 and the sliding groove 8 are designed to realize rapid switching of test modes.

[0060] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A rubber wear resistance testing device, characterized in that: The invention comprises a main structure (1), a friction structure and a fixed structure; the friction structure is fixedly arranged on the main structure (1), the main structure (1) can drive the friction structure to rise and fall, the sandpaper can be detachably mounted on the friction structure, and the friction structure can change the shape of the sandpaper, the fixed structure is fixedly arranged on the main structure (1) and is located below the friction structure, the fixed structure can contact the sandpaper on the friction structure, and the fixed structure is used to fix the rubber; The friction structure comprises a fixing unit (2), a pair of first support units (3), and a plurality of second support units (4); The fixing unit (2) is fixedly arranged on the main structure (1), a pair of the first support units (3) are symmetrically arranged in the middle of the fixing unit (2), and a plurality of the second support units (4) are equidistantly arranged on the left and right sides of the first support unit (3), and the plurality of the second support units (4) have the same structure as the first support unit (3), wherein the fixing unit (2) is used to fix the sandpaper and apply force to both ends of the sandpaper, the first support unit (3) is used to stabilize the middle of the sandpaper in the fixing unit (2), and the second support unit (4) is used to limit the two ends of the sandpaper, so that the sandpaper can be stably bent and flattened along the arc; The fixing unit (2) comprises a spring plate (21), two pairs of screw rods (22), a pair of pressure plates (23), two pairs of clamping arms (24), two pairs of second hydraulic cylinders (25) and two pairs of first turning seats (26); The spring plate (21) is rectangular, and the lower walls of the left and right ends of the spring plate (21) are symmetrically provided with pressure grooves, and the spring plate (21) can be bent. One end of the two pairs of screw rods (22) are movably screwed to the upper wall of the spring plate (21) and close to the four corners, and the two pairs of screw rods (22) are respectively connected to the pressure grooves. A pair of pressure plates (23) are respectively movably embedded in the pressure grooves, and the pressure plates (23) are respectively movably connected to the screw rods (22). The screw rods (22) can rotate on the pressure plates (23). One end of the two pairs of clamping arms (24) are respectively fixedly provided at the left and right ends of the spring plate (21) and close to the four corners respectively. The telescopic ends of the two pairs of second hydraulic cylinders (25) are respectively movably connected to the other end of the clamping arms (24). The two pairs of first flip seats (26) are respectively movably clamped on the second hydraulic cylinders (25), and the first flip seats (26) are respectively fixedly provided on the main structure (1); The first support unit (3) comprises a spring frame (31), a force-bearing rod (32), a pressure detector (33), a first spring (34) and a third hydraulic cylinder (35); The spring frame (31) is a rectangular frame, one end of the force-bearing rod (32) is movable through the middle of the lower wall of the spring frame (31), and the other end of the force-bearing rod (32) is fixedly connected to the upper wall of the spring plate (21), the pressure detector (33) is fixedly arranged in the middle of the inner upper wall of the spring frame (31), the first spring (34) is fixedly arranged between one end of the force-bearing rod (32) and the pressure detector (33), the telescopic end of the third hydraulic cylinder (35) is fixedly arranged on the upper wall of the spring frame (31), and the other end of the third hydraulic cylinder (35) is fixedly arranged on the main structure (1); The third hydraulic cylinder (35) in the first support unit (3) is fixedly connected to the spring frame (31), and the third hydraulic cylinder (35) in the second support unit (4) is movably connected to the spring frame (31).

2. A rubber wear resistance testing device according to claim 1, characterized in that: The fixing structure comprises a rotating unit (5) and a pair of clamping units (6); The rotating unit (5) is fixedly arranged on the main structure (1), and a pair of the clamping units (6) are symmetrically arranged on the rotating unit (5), and the clamping units (6) are respectively located on the front and rear sides of the spring plate (21). The rotating unit (5) is used to drive the clamping unit (6) to rotate, and the clamping unit (6) is used to fix the rubber.

3. A rubber wear resistance testing device according to claim 2, characterized in that: The rotating unit (5) includes a rotating frame (51), a first motor (52), a rotating shaft (53), a fixed platform (54), and an arched platform (55); The rotating frame (51) is concave, and bearings are embedded at both ends of the rotating frame (51). The rotating frame (51) is fixedly arranged on the main structure (1). The first motor (52) is fixedly arranged on the rotating frame (51), and the driving end of the first motor (52) corresponds to the center of the bearing. One end of the rotating shaft (53) is fixedly passed through the middle of the bearings at both ends of the rotating frame (51), and one end of the rotating shaft (53) is connected to the driving end of the first motor (52). The other end of the rotating shaft (53) is located at the front side of the rotating frame (51). The fixed platform (54) is I-shaped, and the fixed platform (54) has There are four ends, the middle of the fixed platform (54) is fixedly arranged on the other end of the rotating shaft (53) and the fixed platform (54) is located opposite to the spring plate (21), the four bottom side walls of the fixed platform (54) are symmetrically provided with a pair of lifting grooves (7), the middle of the upper wall of the fixed platform (54) is parallelly provided with a pair of penetrating sliding grooves (8), the lower wall of the arched platform (55) is symmetrically provided with a pair of plug legs (9) that fit with the sliding grooves (8), the arched platform (55) is detachably placed on the upper wall of the fixed platform (54) through a socket, and the plug legs (9) are inserted into the sliding grooves (8).

4. A rubber wear resistance testing device according to claim 3, characterized in that: The clamping unit (6) comprises a first clamping frame (61), a second clamping frame (62), a pair of racks (63), a second motor (64) and a gear (65); The two ends of the first clamping frame (61) are movable through one of the pairs of lifting slots (7) at the two ends of the rotating frame (51) and are located above the rotating frame (51). The middle part of the first clamping frame (61) is a semicircular structure, and the first clamping frame (61) can be buckled on the arched platform (55). The two ends of the second clamping frame (62) are movable through the other pair of lifting slots (7) at the two ends of the rotating frame (51). The second clamping frame (62) is located below the rotating frame (51), and the second clamping frame (62) is located below the rotating frame (51). The rack (62) corresponds to the first clamping frame (61) in an interlaced manner, a pair of the racks (63) are respectively arranged on one end of the first clamping frame (61) and one end of the second clamping frame (62), and the racks (63) are interlaced and opposite to each other, the second motor (64) is fixedly embedded in the side wall of one end of the rotating frame (51) and is located between the racks (63), the gear (65) is fixedly sleeved on the driving end of the second motor (64), and the gears (65) are respectively engaged with the racks (63).

5. A rubber wear resistance testing device according to claim 4, characterized in that: The height at which the first clamping frame (61) and the second clamping frame (62) are connected is less than the height of the rotating frame (51).

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