Rubber track test tool and test method

Abstract

The invention belongs to the technical field of mechanical detection, and relates to a rubber track test tool and a test method. The test tool comprises a force application device, a driving part and a fixed connection part. The force application device comprises an adjustable force application rod and a vibration excitation table connecting part; the driving part comprises a pair of driving wheel gear rings, a rubber track section and a rotating shaft part; the rotating shaft part comprises a rotating shaft, a pair of shaft head large nuts, a bearing rotating body, a pair of large discs, a pair of supporting bodies and a pair of sleeve gaskets; the fixed connection part comprises a pair of fixing frames, a bottom plate, a pair of base fixing blocks, an end connector, a middle connector and a connector part. According to the invention, the rubber track section is wound on the driving wheel gear ring and is engaged with the gear ring, and the whole body is installed on the test tool, so that the limitation of single horizontal tension caused by only applying tension to two ends in a traditional segmented rubber track section tension strength test is overcome, the reliability of the segmented rubber track strength test is improved, and the test efficiency is improved. And the real vehicle carrying condition can be reflected more truly.

Description

Technical Field

[0001] This invention belongs to the field of mechanical testing technology and relates to a testing fixture and method for rubber tracks. Background Technology

[0002] Segmented rubber tracks offer advantages such as light weight, easy replacement, low noise, and low power consumption, making them widely used in low-speed agricultural tracked vehicles and engineering tracked vehicles. Medium and heavy-duty military rubber tracks are currently under research and development. During the design and development process of rubber tracks, to improve the reliability and durability of real-vehicle testing, ensure the safety of testing personnel, and reduce unnecessary production costs, bench tests must be conducted in advance to test their basic functions, obtain key technical indicators, and make targeted improvements to the technical solutions based on the performance and results of the prototypes during the tests, providing reliable data for subsequent design refinement.

[0003] Currently, the track tension testing fixture in patent CN 104048827 A tests a complete track ring. In patent CN104048827 A, for example... Figure 1 As shown, the testing method in this patent requires a complete track ring for tension testing. This method involves a large footprint, complex operation, and high testing costs. Currently, there are no publicly disclosed patents for testing the traction force on a rubber track at the drive wheel tooth ring.

[0004] To address the testing requirements of segmented rubber track bench tests, a segmented rubber track strength testing fixture needs to be designed to simulate the actual vehicle mounting conditions. This fixture applies the driving force experienced by the drive wheel at the corresponding vehicle speed to each segmented rubber track and its drive wheel ring, making the stress conditions on the rubber track during testing closer to the actual vehicle testing state. The testing process is convenient and controllable, resulting in more efficient and reliable data acquisition and significantly reduced testing costs. Summary of the Invention

[0005] The purpose of this invention is to provide a combined segmented rubber track strength testing fixture structure and testing method for medium and heavy tracked vehicles. Unlike the full-ring track tension testing fixture, this fixture can perform wrapping tensile strength, durability, and tensile strength tests on a single segment of rubber track. The rubber track segment is wrapped around the drive wheel gear ring, with the rubber track end connector meshing with the gear ring, and the entire assembly is installed on the fixture of this invention. This overcomes the limitation of traditional segmented rubber track tensile strength tests, which only apply tension to both ends, resulting in a single horizontal tensile force. It improves the reliability of segmented rubber track strength testing, more realistically reflects the actual vehicle mounting conditions, and thus provides reliable test data for related designs.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This invention proposes a rubber track testing fixture, comprising a force application device, a drive section, and a fixed connection section; the force application device includes an adjustable force application rod (1) and a vibration table connecting component (2); the drive section includes a pair of drive wheel gear rings (3), a rubber track section (4), and a rotating shaft component (5), wherein the rotating shaft component includes: a rotating shaft (12), a pair of shaft head nuts (13), a bearing rotating body (14), a pair of large discs (15), a pair of support bodies (16), and a pair of sleeve washers (17); the fixed connection section includes a pair of fixing frames (6), a base plate (7), a pair of base fixing blocks (8), an end connector (9), a middle connector (10), and a connector section (11); A pair of fixing brackets (6) are installed opposite each other on the base plate (7); a pair of base fixing blocks (8) are fixed on the base plate (7) and located in front of the pair of fixing brackets (6); The rotating shaft (12) passes through the bearing rotating body (14), the central through hole of the shaft head nut (13) in sequence, and passes through the central holes of the sleeve washer (17), the drive gear ring (3), and the rotating shaft component (5) at both ends. Then it is installed on a pair of fixed brackets (6) through the bushing. A large disc (15) with a large diameter step protrusion arc surface is installed and fixed in the groove of the inner wall of a support (16), and a pair of supports (16) are installed and fixed in the two grooves on the outer cylindrical surface of the bearing rotating body (14); a drive gear ring (3) is fixedly installed on the outer side of each large disc (15) by a pin. The rubber track (4) is attached to the drive wheel ring (3). The end of the rubber track (4) near the ground is connected to the two base fixing blocks (8) through the end connector (9), the middle connector (10), and the pin, thus fixing this end; the other end of the rubber track (4) is fixed to the two drive wheel rings (3) through the connector part (11) and the pin. The adjustable force rod 1 has two through holes at its end. The end is connected and fixed by pins to the large disc (15), support body (16), and drive gear ring (3) located on both sides of it. The rod body has equidistant bolt holes and is connected and fixed to the vibration table connection component (2) by bolts.

[0007] Furthermore, the large disc (15) has symmetrical holes drilled around its center. A ring of through holes around the outer edge of the large disc is connected and fixed to the drive gear ring (3) by pins. Four positioning holes are symmetrically designed on the large disc (15) to match the position and size of the through holes on the ring inside the support body (16).

[0008] Furthermore, the support (16) is a ring structure formed by bolting together four identical quarter-circle structures.

[0009] Furthermore, the interior of the quarter circle structure is designed with a quarter circle ring perpendicular to the quarter circle arc. A through hole is drilled on the quarter circle ring to match the round hole of the large disc (15) and it is connected and fixed with a pin.

[0010] Furthermore, the arc surface of the larger diameter step protrusion of the large disc (15) is installed and fixed in the groove of the inner wall of the quarter circle structure in the support body (16). The quarter circle of the support body (16) is installed and fixed in the two grooves of the outer cylindrical surface of the bearing rotating body (14). The four quarter circle structures of the support body (16) are installed and fixed in this way after the large disc (15) is installed and fixed in the two grooves of the outer cylindrical surface of the bearing rotating body (14). The four quarter circle structures are fixed with bolts to form a complete ring.

[0011] Furthermore, the connector part (11) is made up of four identical cross-shaped connecting blocks connected by pins. One end of the connecting block adopts an arc design, and its arc end has a through hole, which is used to connect and fix with the end connector of the rubber track (4) by pin. The two ends of the connecting block perpendicular to the arc end are respectively provided with two through holes perpendicular to the through hole on the arc end, which are used to connect and fix the two connecting blocks by pins. The through hole on the arc end of the other connecting block is fixed by pins to the round hole of the large disc (15).

[0012] Furthermore, the bearing is placed inside the bearing rotating body (14), and a stepped cylindrical solid with a small diameter is provided inside to prevent the bearing from moving axially. The two end faces of the cylinder are provided with equally spaced threaded holes that are connected to the threaded holes of the sleeve washer (17) by bolts. The outer cylindrical surface of the bearing rotating body (14) is provided with two grooves.

[0013] Furthermore, a through hole is provided at the center of the sleeve gasket (17), and a protruding stepped circular surface is provided on the outer side of the center of the sleeve gasket (17) to further prevent relative displacement between the bearing rotating body (14) and the sleeve gasket (17).

[0014] The present invention also provides a rubber track test method. One end of the rubber track section (4) is connected to two base fixing blocks (8) via an end connector (9), a middle connector (10), and a pin. The other end is fixed to two drive wheel gear rings (3) via a connector part (11) and a pin. When the excitation head applies force through the adjustable force rod (1), the rubber track section (4) rotates around the drive wheel gear rings (3). The track end connector effectively meshes with the drive wheel gear rings (3), simulating the track stress situation during actual vehicle driving. The corresponding force value is repeatedly applied at the excitation head to conduct a durability test of the rubber track.

[0015] Furthermore, a spring is connected to the other end of the rubber track, and a tension of a corresponding frequency is applied to the spring to conduct a durability test.

[0016] Beneficial effects of the present invention 1. The advantage of this invention is that the meshing state of the drive wheel gear ring (3) and the rubber track section (4) in this test fixture is the same as the meshing state of the drive wheel gear ring and the track section when the actual vehicle is driving, so its test results are more reliable and authoritative.

[0017] 2. Adjustable force bar (1) is equipped with multiple equidistant bolts, which can conveniently and quickly adjust different applied force values ​​while ensuring reliable use, so as to intuitively observe the force changes of the rubber track section (4).

[0018] 3. Durability test: This test bench structure can conduct durability tests on the rubber track section. By adjusting the pressure value and frequency applied by the test bench, or by connecting a spring to the other end of the rubber track and applying a tension force of a corresponding frequency at the spring, the stress on the rubber track at the drive wheel at different vehicle speeds can be simulated.

[0019] 4. Tensile strength test: This test bench structure can perform tensile strength tests on rubber track sections. The end of the track section closest to the ground is fixed. By adjusting the force applied by the test bench, the tensile strength test of the rubber track can be completed. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a prior art device; Figure 2 , Figure 3 This is a schematic diagram of the structure of the rubber track testing fixture of the present invention; Figure 4 This is an exploded schematic diagram of the rubber track testing fixture of the present invention; Figure 5 This is a schematic diagram of the large circular disk; Figure 6 This is a schematic diagram of an adjustable force-applying rod; Figure 7 This is a schematic diagram of the support structure; Figure 8 This is a schematic diagram of the connecting block; Figure 9 This is a schematic diagram of the rotating body of the bearing; Figure 10 This is a schematic diagram of a sleeve gasket; Figure 11 This is a simplified schematic diagram of the experimental process. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings.

[0022] This modular segmented rubber track connection structure mainly consists of end connectors, limiting rings, and center connectors.

[0023] The track pins in two adjacent rubber track sections are connected by two end connectors and one middle connector, connecting several track sections into a ring-shaped assembly that meets the circumference requirements of the whole vehicle, forming a ring-shaped rubber track. The end coupler plays a crucial role in preventing the track from falling off when the vehicle is turning or tilting. It is an integral closed-loop structure, with a circular ring-shaped limiting ring used to restrict the axial movement of the track pin.

[0024] The coupling is a split structure. The upper and lower parts of the coupling are tightened with bolts to hold the track pins and transmit track traction force.

[0025] A schematic diagram of the rubber track testing fixture is attached. Figure 2 , Figure 3 As shown, the overall structure is symmetrical and mainly consists of a force-applying device, a driving part, and a fixed connection part.

[0026] The force application device mainly includes: an adjustable force application rod (1) and a vibration table connecting component (2).

[0027] The drive section mainly includes: a pair of drive wheel gear rings (3), a rubber track section (4), and a shaft component (5), wherein the shaft component includes: a rotating shaft (12), a pair of shaft head nuts (13), a bearing rotating body (14), a pair of large discs (15), a pair of support bodies (16), and a pair of sleeve washers (17).

[0028] The fixed connection part mainly includes: a pair of fixed brackets (6), a base plate (7), a base fixing block (8), an end connector (9), a middle connector (10), and a connector part (11).

[0029] like Figure 5 As shown, the large disc (15) has symmetrical holes drilled around its center, as follows: Figure 5 As shown, a ring of through holes around the outer edge of the large disc is connected and fixed to the drive gear ring (3) by a pin, and the drive gear ring (3) is fixed to the outside of the large disc (15). Four positioning holes are symmetrically designed on the large disc (15), which match the position and size of the through holes on the ring inside the support body (16).

[0030] The support (16) is a ring-shaped structure formed by bolting together four identical quarter-circle structures, such as... Figure 7 As shown, the internal design of the quarter circle structure is a quarter circle ring perpendicular to the quarter circle arc. A through hole is drilled on the quarter circle ring to match the round hole of the large disc (15) and is connected and fixed with a pin.

[0031] The connector part (11) is composed of four identical cross-shaped connecting blocks connected by pins, such as... Figure 8As shown, one end of the connecting block adopts an arc design, and its arc end has a through hole, which is used to connect and fix with the end connector of the rubber track (4) by a pin. The two ends of the connecting block perpendicular to the arc end are respectively provided with two through holes perpendicular to the through hole on the arc end, which are used to connect and fix the two connecting blocks by a pin. The through hole on the arc end of the other connecting block is fixed by a pin to the round hole of the large disc (15).

[0032] The rotating shaft (12), the shaft head nut (13), and the bearing rotating body (14) are all fixed at the central axis of the support body (16).

[0033] The bearing rotating body (14) is attached. Figure 9 As shown, a bearing is placed inside, and a stepped cylindrical solid with a small diameter is provided inside to prevent the bearing from moving axially. The two end faces of the cylinder are provided with equally spaced threaded holes that are connected to the threaded holes of the sleeve washer (17) by bolts. The outer cylindrical surface of the bearing rotating body (14) is provided with two grooves.

[0034] Sleeve gasket (17) as attached Figure 10 As shown, a through hole is provided at its center. The outer side of the center of the sleeve gasket (17) is provided with a protruding stepped circular surface to further prevent relative displacement between the bearing rotating body (14) and the sleeve gasket (17).

[0035] The rotating shaft (12) passes through the central through hole of the bearing rotating body (14) and the large nut (13) in sequence. After passing through the central hole of the sleeve washer (17), the drive gear ring (3), and the rotating shaft component (5) at both ends, it is installed on a pair of fixed brackets (6) through the bushing.

[0036] Among them, such as Figure 4 , Figure 7 As shown, the support body (16) has a limiting groove on a quarter arc, the large disc (15) has two arc steps of different diameters on its outer periphery, and the bearing rotating body (14) has two grooves on its outer cylindrical surface.

[0037] A pair of fixing brackets (6) are installed opposite each other on the base plate (7), and the lower end of the fixing brackets (6) is fixed to the base plate (7) by bolts.

[0038] The arc surface of the larger diameter step protrusion of the large disc (15) is installed and fixed in the groove of the inner wall of the quarter circle structure in the support body (16). The quarter circle of the support body (16) is installed and fixed in the two grooves of the outer cylindrical surface of the bearing rotating body (14). The four quarter circle structures of the support body (16) are installed and fixed in this way, and then installed and fixed in the two grooves of the outer cylindrical surface of the bearing rotating body (14). The four quarter circle structures are fixed with bolts to form a complete ring.

[0039] Each large disc (15) has a drive gear ring (3) fixedly mounted on its outer side by a pin.

[0040] A pair of base fixing blocks (8) are fixed on the base plate (7) in front of a pair of fixing frames (6), and the rubber track (4) is attached to the drive wheel ring gear (3). The end of the rubber track (4) closest to the ground is connected to the two base fixing blocks (8) through the end connector (9), the middle connector (10), and the pin, thus fixing this end. The other end of the rubber track (4) is fixed to the two drive wheel ring gears (3) through the connector part (11) and the pin.

[0041] Adjustable force bar (1) such as Figure 6 As shown, the end part is provided with two through holes, and the end part is connected and fixed by pins to the large disc (15) and the support body (16) located on both sides respectively; the rod body is provided with equidistant bolt holes, and is connected and fixed to the vibration table connecting part (2) by bolts.

[0042] During the test, the force value required for this test is adjusted by the different force values ​​on the display screen corresponding to the up-and-down movement of the exciter head at the hydraulic exciter table. Its up-and-down movement causes the adjustable force rod (1) to swing, thereby driving the drive wheel gear ring (3) to rotate through the rotating shaft component (5), and thus the force condition of the rubber track section (4) can be observed.

[0043] The rubber track test method of the present invention is as follows: the rubber track section (4) is connected to two base fixing blocks (8) at one end near the ground through the end connector (9), the middle connector (10), and the pin, and the other end is fixed to two drive wheel gear rings (3) through the connector part (11) and the pin. When the excitation head applies force through the adjustable force rod (1), the rubber track section (4) rotates around the drive wheel gear ring (3), and the track end connector effectively meshes with the drive wheel gear ring (3) to simulate the track stress situation during actual vehicle driving.

[0044] In this test method, the adjustable force bar (1) is provided with multiple equidistant bolt holes. By calculation, different applied force values ​​are adjusted, and then connected to the vibration table connection component (2) by bolts, so as to meet the test requirements of different force value changes.

[0045] The corresponding force value is repeatedly applied at the excitation head to meet the durability test of the rubber track.

[0046] Another method for using this fixture is to fix the force value shown at the vibration table, connect a spring to the other end of the rubber track, and apply a tension force of the corresponding frequency to the spring, such as... Figure 11 As shown, durability tests can also be performed.

[0047] By adjusting the adjustable force bar (1), a corresponding force is applied at the excitation head to meet the tensile strength test of the rubber track.

Claims

1. A testing fixture for rubber tracks, characterized in that, It includes a force application device, a drive section, and a fixed connection section; the force application device includes an adjustable force application rod (1) and a vibration table connection component (2); the drive section includes a pair of drive wheel gear rings (3), a rubber track section (4), and a rotating shaft component (5), wherein the rotating shaft component includes: a rotating shaft (12), a pair of shaft head nuts (13), a bearing rotating body (14), a pair of large discs (15), a pair of support bodies (16), and a pair of sleeve washers (17); the fixed connection section includes a pair of fixing frames (6), a base plate (7), a pair of base fixing blocks (8), an end connector (9), a middle connector (10), and a connector section (11); A pair of fixing brackets (6) are installed opposite each other on the base plate (7); a pair of base fixing blocks (8) are fixed on the base plate (7) and located in front of the pair of fixing brackets (6); The rotating shaft (12) passes through the bearing rotating body (14), the central through hole of the shaft head nut (13) in sequence, and passes through the central holes of the sleeve washer (17), the drive gear ring (3), and the rotating shaft component (5) at both ends. Then it is installed on a pair of fixed brackets (6) through the bushing. A large disc (15) with a large diameter step protrusion arc surface is installed and fixed in the groove of the inner wall of a support (16), and a pair of supports (16) are installed and fixed in the two grooves on the outer cylindrical surface of the bearing rotating body (14); a drive gear ring (3) is fixedly installed on the outer side of each large disc (15) by a pin. The rubber track (4) is attached to the drive wheel ring (3). The end of the rubber track (4) near the ground is connected to the two base fixing blocks (8) through the end connector (9), the middle connector (10), and the pin, thus fixing this end; the other end of the rubber track (4) is fixed to the two drive wheel rings (3) through the connector part (11) and the pin. The adjustable force rod 1 has two through holes at its end. The end is connected and fixed by pins to the large disc (15), support body (16), and drive gear ring (3) located on both sides of it. The rod body has equidistant bolt holes and is connected and fixed to the vibration table connection component (2) by bolts.

2. The rubber track testing fixture as described in claim 1, characterized in that, The large disc (15) has symmetrical holes drilled around its center. A ring of through holes around the outer edge of the large disc is connected and fixed to the drive gear ring (3) by pins. Four positioning holes are symmetrically designed on the large disc (15) to match the position and size of the through holes on the ring inside the support body (16).

3. The rubber track testing fixture as described in claim 1, characterized in that, The support (16) is a ring structure made up of four identical quarter-circle structures connected by bolts.

4. The rubber track testing fixture as described in claim 3, characterized in that, The internal design of the quarter circle structure is a quarter circle ring perpendicular to the quarter circle arc. A through hole is drilled on the quarter circle ring to match the round hole of the large disc (15) and it is connected and fixed with a pin.

5. The rubber track testing fixture as described in claim 4, characterized in that, The arc surface of the larger diameter step protrusion of the large disc (15) is installed and fixed in the groove of the inner wall of the quarter circle structure in the support body (16). The quarter circle of the support body (16) is installed and fixed in the two grooves of the outer cylindrical surface of the bearing rotating body (14). The four quarter circle structures of the support body (16) are installed and fixed in this way, and then installed and fixed in the two grooves of the outer cylindrical surface of the bearing rotating body (14). The four quarter circle structures are fixed with bolts to form a complete ring.

6. The rubber track testing fixture as described in claim 1, characterized in that, The connector part (11) is made up of four identical cross-shaped connecting blocks connected by pins. One end of the connecting block adopts an arc design, and its arc end has a through hole, which is used to connect and fix with the end connector of the rubber track (4) by pin. The two ends of the connecting block perpendicular to the arc end are respectively provided with two through holes perpendicular to the through hole on the arc end, which are used to connect and fix the two connecting blocks by pin. The through hole on the arc end of the other connecting block is fixed by pin and the round hole of the large disc (15).

7. The rubber track testing fixture as described in claim 1, characterized in that, The bearing is placed inside the bearing rotating body (14). The interior has a stepped cylindrical solid with a small diameter to prevent the bearing from moving axially. The two end faces of the cylinder have equally spaced threaded holes that are connected to the threaded holes of the sleeve washer (17) by bolts. The outer cylindrical surface of the bearing rotating body (14) has two grooves.

8. The rubber track testing fixture as described in claim 1, characterized in that, The sleeve gasket (17) has a through hole at its center and a protruding stepped circular surface on the outer side of the center of the sleeve gasket (17) to further prevent relative displacement between the bearing rotating body (14) and the sleeve gasket (17).

9. A test method for rubber tracks, characterized in that, The rubber track section (4) is connected to two base fixing blocks (8) at one end near the ground via an end connector (9), a middle connector (10), and a pin. The other end is fixed to two drive wheel gear rings (3) via a connector part (11) and a pin. When the exciter applies force through the adjustable force rod (1), the rubber track section (4) rotates around the drive wheel gear rings (3). The track end connector effectively meshes with the drive wheel gear rings (3), simulating the track stress during actual vehicle operation. The corresponding force value is repeatedly applied at the exciter to conduct a durability test of the rubber track.

10. The rubber track testing method as described in claim 9, characterized in that, A spring is connected to the other end of the rubber track, and a tension of a corresponding frequency is applied to the spring to conduct a durability test.

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