A tooling for testing the durability of a motorcycle fuel tank lock disc

Abstract

This invention relates to the field of testing equipment technology, specifically a durability testing fixture for motorcycle fuel tank lock discs. It includes a mounting frame, a testing box, a fixed base, and a lock disc body. The testing box has an oil port, and a pressure sensor is installed inside. A proximity switch is installed at the farthest point of the lock tongue's sliding distance. A pressurizing assembly is provided on the testing box, and a piston rod is mounted on the pressurizing assembly. A motor is mounted on the mounting frame, and a push rod is slidably connected to the mounting frame. The motor drives the push rod to push the lock disc body towards the oil port. The piston rod applies gas pressure to the testing box using the rotational force of the lock disc body, and the pressure sensor detects the gas pressure inside the testing box. This avoids the problem of inconsistent testing pressure leading to inaccurate test data in motorcycle fuel tank lock disc sealing performance testing, ensuring the reliability of the test data from this motorcycle fuel tank lock disc durability testing fixture.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, specifically to a tooling for testing the durability of a motorcycle fuel tank lock disc. Background Technology

[0002] The motorcycle fuel tank lock disc durability testing fixture is a device used to perform durability tests on motorcycle fuel tank lock discs. It mainly consists of mechanical structures, control and testing systems, etc. It can simulate various working conditions of motorcycle fuel tank lock discs in actual use and evaluate the performance and reliability of the lock discs. After repeated opening and closing, the sealing performance of the motorcycle fuel tank cap deteriorates, and conventional motorcycle fuel tank lock disc sealing performance testing suffers from low testing efficiency.

[0003] To address the aforementioned problems, existing technologies have proposed several solutions. For example, patent application CN202123374378.2 discloses a motorcycle fuel tank cap durability testing device. This solution includes a fuel tank mounting base, with the fuel tank fixed on the mounting base. A linear cylinder is also mounted on the mounting base, and a rotary cylinder is located at the piston rod end of the linear cylinder. The drive end of the rotary cylinder is connected to a fuel tank cap fixing plate, and this end passes through the fuel tank cap fixing plate via an open coupling and is connected to the fuel tank cap. The fuel tank cap is positioned corresponding to the fuel tank. The linear cylinder and the rotary cylinder are connected to a control system via an air circuit. The control system controls the rotary cylinder to drive the open coupling to insert a key into the fuel tank cap to unlock / lock the cap, controls the linear cylinder to drive the cap to open / close, and reads the drive data. While this solution solves the problem of low testing efficiency, when testing the sealing performance of the fuel tank lock disc, the applied testing pressure cannot be consistent each time, easily leading to inaccurate test data. Summary of the Invention

[0004] The purpose of this invention is to provide a tooling for testing the durability of motorcycle fuel tank lock discs, so as to solve the problem of low testing efficiency in existing motorcycle fuel tank lock disc sealing performance testing tests, and at the same time solve the problem of inaccurate test data caused by inconsistent testing pressure in the testing test.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A durability testing fixture for a motorcycle fuel tank lock disc includes a mounting frame, a testing box, a fixed base, and a lock disc body. The testing box is mounted on the mounting frame and has a fuel inlet. The fixed base is mounted on the testing box and is coaxial with the fuel inlet. The lock disc body is rotatably connected to the fixed base. The lock disc body includes a lock body, a sealing ring, a sealing spring, a latch, and a locking spring. The sealing ring and the sealing spring are slidably fitted onto the lock body coaxially. The latch is slidably connected to the lock body, and the sliding direction of the latch is perpendicular to the axis of the lock body. The locking spring is installed between the latch and the lock body. A pressure sensor is installed inside the testing box. A proximity switch is installed at the farthest point of the latch's sliding distance. A pressure application assembly is provided on the testing box, and a piston rod is provided on the pressure application assembly. The two ends of the piston rod are connected to the lock disc body and the testing box, respectively. A motor is mounted on the mounting frame. A sliding push rod is connected, and the motor drives the push rod to push the lock disc body to swing towards the oil port. The lock disc body swings towards the oil port until it is flush with the fixed base. During this process, the sealing ring contacts the oil port and is tightly connected to the oil port through pressure applied by the sealing spring. At the same time, the locking spring drives the locking tongue to pop out and embed into the test chamber. During the swing of the lock disc body towards the oil port, the piston rod uses the rotational force of the lock disc body to apply gas pressure to the test chamber. After the locking tongue pops out and moves to its farthest end, the proximity switch is turned on. At this time, the pressure sensor detects the gas pressure in the test chamber. This avoids the problem of low detection efficiency in existing motorcycle fuel tank lock disc sealing performance testing tests, and solves the problem of inaccurate test data caused by inconsistent detection pressure in the test. This ensures the detection efficiency of the motorcycle fuel tank lock disc durability testing fixture and the reliability of the test data.

[0007] Preferably, the pressurizing assembly includes a piston cylinder and a cup. The piston cylinder is mounted on a detection box, which contains an air storage chamber. The piston cylinder contains a pressurizing chamber, the lower end of which communicates with the air storage chamber. The piston rod is slidably connected within the piston cylinder. The cup is mounted on the lower end face of the piston rod and is frustoconical with its larger end facing downwards. When the lock disc body swings towards the oil port, the cup moves downwards, compressing the air in the pressurizing chamber and transferring it to the air storage chamber, thus increasing the air pressure in the air storage chamber. The high-pressure gas acts on the lock disc body (such as sealing rings, locking tongues, etc.), simulating actual operation. In high-pressure environments (such as pressure fluctuations inside the fuel tank), the design of the large end of the rubber cup facing downwards allows its outer circumference to fit tightly against the inner wall of the piston cylinder when under pressure. The elastic deformation of the rubber material fills the gaps, preventing gas leakage from the contact surface between the piston cylinder and the piston rod. At the same time, the rubber cup, as an elastic medium, can convert the rigid thrust of the piston rod into a uniform air pressure load, preventing the lock disc body from bearing local impact loads, reducing abnormal wear or damage during the test, ensuring the reliability of the test data of the motorcycle fuel tank lock disc durability testing fixture, and ensuring the testing accuracy and durability of the motorcycle fuel tank lock disc durability testing fixture.

[0008] Preferably, the detection box further includes a detection chamber connected to the detection oil port. A trigger switch is installed between the detection chamber and the air storage chamber. The trigger switch has a trigger groove, and a trigger block is slidably connected within the trigger groove. A trigger spring is installed within the trigger groove, with its two ends connected to the trigger block and the inner wall of the trigger groove, respectively. The end of the trigger block away from the trigger spring contacts the locking tongue. Both the trigger switch and the trigger block have trigger channels. When the locking tongue is extended, the trigger channel on the trigger block is coaxial with the trigger channel on the trigger switch, and its two ends are connected to the detection chamber and the air storage chamber, respectively. When the locking tongue is not extended (the locking disc is in a locked state), the trigger block... The device remains in its original position under the action of the trigger spring, with the trigger channel misaligned, isolating the detection chamber from the air storage chamber. When the lock disc body swings to be flush with the fixed base, the locking tongue slides outward and inserts into the oil port. At the same time, the locking tongue pushes the trigger block and compresses the trigger spring. The trigger block slides to a position coaxial with the trigger channel, connecting the detection chamber and the air storage chamber through the trigger channel. At this time, the air pressure in the air storage chamber can be transmitted to the detection chamber through the trigger channel, preventing the gas in the air storage chamber from entering the detection chamber prematurely when the sealing ring is not in close contact with the oil port, and flowing out through the gap between the oil port and the sealing ring, which would cause the pressure in the detection chamber to decrease during testing. This ensures the detection accuracy and reliability of the motorcycle fuel tank lock disc durability testing fixture.

[0009] Preferably, the side of the piston cup that contacts the inner wall of the piston cylinder is provided with a sealing surface, and the angle between the sealing surface and the inner wall of the piston cylinder is in the range of 15° to 30°. When the piston rod descends and compresses the gas, the gas pressure is transmitted to the sealing surface through the piston cup. Under the action of the angle, a radial expansion force (F1) is generated, which makes the piston cup fit tightly against the inner wall of the piston cylinder and enhances the sealing effect. If the angle of the sealing surface is too large (e.g., >30°), the contact area between the edge of the piston cup and the cylinder wall increases, the friction increases, and the rubber material wears rapidly during high-frequency reciprocating motion, or even tears (especially when there are small protrusions on the cylinder wall). If the angle is too small (e.g., <15°), the edge may crack due to stress concentration, shortening the life of the piston cup. This ensures the sealing reliability and durability of the motorcycle fuel tank lock disc durability testing fixture.

[0010] Preferably, a support ring is coaxially provided on the sealing surface, and the outer wall of the support ring is slidably connected to the inner wall of the piston cylinder. A spring ring is provided inside the support ring. When the piston rod drives the piston cup to reciprocate, the support ring bears the radial load (such as gas pressure and friction), avoiding the piston cup from bearing shear force alone and reducing the deformation stress of the rubber material. The spring ring (such as a metal spring or a rubber elastic ring) is installed inside the support ring to provide continuous radial preload. This avoids the problem that the sealing surface of the piston cup has to bear the gas pressure and friction independently when there is no support ring, which is prone to edge folding and tearing due to excessive deformation. By sharing the load, the support ring reduces the radial stress on the piston cup by about 40%, avoiding cracks in the rubber material due to fatigue, and ensuring the sealing accuracy and reliability of the motorcycle fuel tank lock disc durability testing fixture.

[0011] Preferably, a valve body is installed between the pressurizing chamber and the air storage chamber. The central axis of the valve body is parallel to the central axis of the piston cylinder. The inner wall of the valve body is conical, with the larger end of the cone facing upwards. A valve ball and a buffer spring are provided inside the valve body. The valve ball contacts the inner wall of the valve body, and the two ends of the buffer spring are connected to the upper end of the valve ball and the upper end of the valve body, respectively. Traditional flat valves (such as ball valves and flat valves) are prone to leakage during the pressure holding stage due to impurities (such as metal fragments and oil condensate) or gaps caused by valve ball wear because the sealing surface is flat. Furthermore, the conical valve body, in conjunction with the buffer spring, absorbs the impact energy generated by the valve ball itself when the motorcycle fuel tank lock disc durability testing fixture simulates vibration. This prevents the gas pressure in the air storage chamber from leaking towards the pressurizing chamber, thus avoiding the problem of pressure reduction in the testing chamber during testing. This ensures the testing accuracy and reliability of the motorcycle fuel tank lock disc durability testing fixture.

[0012] Preferably, a cam is mounted on the motor shaft, and a slide plate is mounted on the lower end face of the push rod. The slide plate is arc-shaped, and the cam is in rolling connection with the lower end face of the slide plate. The motor drives the cam to rotate, and the cam pushes the slide plate, which in turn drives the push rod to move. After the lock disc body completes closure, the motor continues to drive the cam to rotate. At this time, the cam will drive the motor to vibrate. The vibration of the cam simulates the pulse load that the lock disc bears when the motorcycle passes over a bumpy road. This avoids the problem of inconsistent test results with real-world usage scenarios caused by a single testing environment, and ensures the reliability of the test data from the motorcycle fuel tank lock disc durability testing fixture.

[0013] Preferably, a permanent magnet is installed on the upper surface of the slide plate, and the mounting frame is made of magnetic material. When the push rod pushes the lock disc body to swing to the position flush with the fixed base, the permanent magnet drives the slide plate to move towards the mounting frame and fit against the mounting frame. At this time, the cam will disengage from the lower surface of the slide plate, avoiding excessive friction between the cam and the slide plate when the motor drives the cam to rotate at high speed, which would cause wear between the slide plate and the cam. This ensures the service life of the motorcycle fuel tank lock disc durability testing fixture.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. This invention features a pressurizing assembly on the testing chamber, with a piston rod on the assembly. The two ends of the piston rod are connected to the lock disc body and the testing chamber, respectively. As the lock disc body swings towards the oil port, the piston rod applies gas pressure to the testing chamber using the rotational force of the lock disc body. The gas pressure inside the testing chamber is detected by a pressure sensor. This avoids the problem of inaccurate test data due to inconsistent test pressure in motorcycle fuel tank lock disc sealing performance testing, and ensures the reliability of the test data from the motorcycle fuel tank lock disc durability testing fixture.

[0016] 2. This invention installs a trigger switch between the detection chamber and the air storage chamber. When the lock disc body swings to be flush with the fixed base, the lock tongue pushes the trigger block and compresses the trigger spring. The trigger block slides to the coaxial position of the trigger channel, and the detection chamber and the air storage chamber are connected through the trigger channel. At this time, the air pressure in the air storage chamber can be transmitted to the detection chamber through the trigger channel. This avoids the problem that when the sealing ring is not in close contact with the oil port, the gas in the air storage chamber will flow out through the gap between the oil port and the sealing ring, which would cause the pressure in the detection chamber to drop during the test. This ensures the detection accuracy and reliability of the motorcycle fuel tank lock disc durability testing fixture.

[0017] 3. This invention features a cam mounted on the motor shaft and a sliding plate mounted on the lower end of the push rod. The motor drives the cam to rotate, which in turn pushes the sliding plate to move the push rod. After the lock disc body completes closure, the motor continues to drive the cam to rotate. At this time, the cam will cause the motor to vibrate. The vibration of the cam simulates the pulse load that the lock disc experiences when a motorcycle travels over bumpy roads. This avoids the problem of inconsistent test results with real-world usage scenarios caused by a single testing environment, thus ensuring the reliability of the test data from the motorcycle fuel tank lock disc durability testing fixture. Attached Figure Description

[0018] Figure 1 This is a front axonometric view of the motorcycle fuel tank lock disc durability testing fixture of the present invention;

[0019] Figure 2 This is a rear sectional view of the motorcycle fuel tank lock disc durability testing fixture of the present invention.

[0020] Figure 3 This is a left sectional view of the motorcycle fuel tank lock disc durability testing fixture of the present invention;

[0021] Figure 4 For the present invention Figure 3 Sectional view at point AA;

[0022] Figure 5 This is an exploded view of the motorcycle fuel tank lock disc durability testing fixture of the present invention.

[0023] In the diagram: 1. Mounting bracket; 201. Detection box; 202. Oil port; 203. Air storage chamber; 204. Detection chamber; 3. Fixed base; 4. Locking disc body; 501. Pressure sensor; 502. Proximity switch; 503. Motor; 504. Push rod; 505. Cam; 506. Slide plate; 507. Permanent magnet; 601. Piston cylinder; 602. Piston rod; 603. Leather cup; 604. Pressurization chamber; 605. Trigger switch; 606. Trigger groove; 607. Trigger block; 608. Trigger spring; 609. Trigger channel; 701. Sealing surface; 702. Support ring; 703. Spring ring; 801. Valve body; 802. Valve ball; 803. Buffer spring. Detailed Implementation

[0024] Please see Figures 1 to 5 This invention provides a tooling for testing the durability of a motorcycle fuel tank lock disc, the technical solution of which is as follows:

[0025] A durability testing fixture for motorcycle fuel tank lock discs; please refer to [link / reference]. Figures 1 to 5The system includes a mounting bracket 1, a testing box 201, a fixed base 3, and a lock disc body 4. The testing box 201 is mounted on the mounting bracket 1 and has an oil port 202. The fixed base 3 is mounted on the testing box 201 and is coaxial with the oil port 202. The lock disc body 4 is rotatably connected to the fixed base 3 and includes a lock body, a sealing ring, a sealing spring, a latch, and a locking spring. The sealing ring and the sealing spring are slidably fitted onto the lock body coaxially. The latch is slidably connected to the lock body, and the sliding direction of the latch is perpendicular to the axis of the lock body. The locking spring is installed between the latch and the lock body. A pressure sensor 501 is installed inside the testing box 201, and a proximity switch 502 is installed at the farthest point of the latch sliding distance. The testing box 201 is equipped with a pressure assembly. The pressurization assembly includes a piston cylinder 601, a piston rod 602, and a piston cup 603. The piston cylinder 601 is mounted on a detection box 201, which contains a gas storage chamber 203. The piston cylinder 601 also contains a pressurization chamber 604, the lower end of which communicates with the gas storage chamber 203. A valve body 801 is installed between the pressurization chamber 604 and the gas storage chamber 203. The central axis of the valve body 801 is parallel to the central axis of the piston cylinder 601. The inner wall of the valve body 801 is conical, with the larger end of the cone facing upwards. A valve ball 802 and a buffer spring 803 are located inside the valve body 801. The valve ball 802 contacts the inner wall of the valve body 801, and the two ends of the buffer spring 803 are connected to the upper ends of the valve ball 802 and the upper ends of the valve body 801, respectively. The piston rod 602 is slidably connected to the piston cylinder 601. Inside, a piston cup 603 is installed on the lower end face of the piston rod 602. The piston cup 603 is frustoconical with its larger end facing downwards. A sealing surface 701 is provided on the side of the piston cup 603 that contacts the inner wall of the piston cylinder 601. The angle between the sealing surface 701 and the inner wall of the piston cylinder 601 is 20°. A support ring 702 is coaxially provided on the sealing surface 701. The outer wall of the support ring 702 is slidably connected to the inner wall of the piston cylinder 601. A spring ring 703 is provided inside the support ring 702. A detection chamber 204 is also provided inside the detection box 201. The detection chamber 204 is connected to the detection oil port 202. A trigger switch 605 is installed between the detection chamber 204 and the air storage chamber 203. A trigger groove 606 is provided on the trigger switch 605. A trigger block 6 is slidably connected in the trigger groove 606. 07. A trigger spring 608 is installed in the trigger groove 606. The two ends of the trigger spring 608 are connected to the trigger block 607 and the inner wall of the trigger groove 606, respectively. The end of the trigger block 607 away from the trigger spring 608 contacts the lock tongue. Both the trigger switch 605 and the trigger block 607 have trigger channels 609. When the lock tongue is pushed out, the trigger channel 609 on the trigger block 607 is coaxial with the trigger channel 609 on the trigger switch 605. The two ends of the trigger channel 609 are connected to the detection chamber 204 and the air storage chamber 203, respectively. The two ends of the piston rod 602 are connected to the lock disc body 4 and the detection box 201, respectively. A motor 503 is installed on the mounting bracket 1. A push rod 504 is slidably connected to the mounting bracket 1. A cam 505 is installed on the rotating shaft of the motor 503.A sliding plate 506 is mounted on the lower end face of the push rod 504. The sliding plate 506 is arc-shaped, and the cam 505 is in rolling connection with the lower end face of the sliding plate 506. A permanent magnet 507 is mounted on the upper end face of the sliding plate 506, and the mounting bracket 1 is made of magnetic material. During the swinging motion of the lock disc body 4 towards the oil port 202, the piston rod 602 applies gas pressure to the test chamber 201 using the rotational force of the lock disc body 4. After the lock tongue pops out and moves to its farthest point, the proximity switch 502 is activated. At this time, the pressure sensor 501 detects the gas pressure in the test chamber 201, avoiding the problem of inaccurate test data due to inconsistent test pressure in the motorcycle fuel tank lock disc sealing performance test, and ensuring the reliability of the test data of the motorcycle fuel tank lock disc durability test fixture.

[0026] When working, please refer to Figures 1 to 5 After the motor 503 starts, it drives the cam 505 to rotate. The cam 505 uses its own contour to push the lower end face of the arc-shaped slide plate 506, causing the push rod 504 to move towards the lock disc body 4 and push the lock disc body 4. At this time, the lock disc body 4 is pressed and rotates along the connection between the lock disc body 4 and the fixed base 3. During the rotation of the lock disc body 4, the piston rod 602 is pressed and drives the diaphragm 603 to slide downward in the piston cylinder 601. The diaphragm 603 compresses the gas in the pressurizing chamber 604. At this time, the high-pressure gas in the pressurizing chamber 604 pushes the valve ball 802 and compresses the buffer spring 803, so that the valve body 801 connects the pressurizing chamber 604 and the air storage chamber 203 and pushes the high-pressure gas into the air storage chamber 203. During the swing of the lock disc body 4, the lock tongue oil receiving port The reaction force of the inner wall of 202 compresses and overcomes the resistance of the locking spring, causing it to contract. When the lock disc body 4 swings to be flush with the fixed base 3, the lock tongue loses the restraint of the inner wall of the oil port 202, pushes out away from the lock body and embeds itself at the connection between the detection box 201 and the oil port 202. At this time, the ejected lock tongue pushes the trigger block 607 and compresses the trigger spring 608. The trigger block 607 slides to a position coaxial with the trigger channel 609. The detection chamber 204 and the air storage chamber 203 are connected through the trigger channel 609. At this time, the air pressure in the air storage chamber 203 can be transmitted to the detection chamber 204 through the trigger channel 609. At the same time, when the lock tongue is ejected and moves to the farthest end, the proximity switch 502 is turned on. At this time, the pressure sensor 501 detects the gas pressure in the detection box 201.

[0027] It is worth noting that when the push rod 504 pushes the lock disc body 4 to swing to the position flush with the fixed base 3, the permanent magnet 507 drives the slide plate 506 to move towards the mounting bracket 1 and fit against the mounting bracket 1, so that the cam 505 disengages from the lower end surface of the slide plate 506. Furthermore, the motor 503 drives the cam 505 to rotate at high speed and generate vibration. The vibration of the cam 505 simulates the pulse load borne by the lock disc when a motorcycle passes over a bumpy road.

[0028] The specific embodiment of the present invention has been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the embodiments described above. For those skilled in the art, various changes, modifications, substitutions, and variations made to these embodiments without departing from the principles and ideas of the present invention should still fall within the protection scope of the present invention.

Claims

1. A fixture for testing the durability of a motorcycle fuel tank lock disc, characterized in that, The system includes a mounting bracket (1), a testing box (201), a fixed base (3), and a lock disc body (4). The testing box (201) is mounted on the mounting bracket (1) and has an oil port (202). The fixed base (3) is mounted on the testing box (201) and is coaxial with the oil port (202). The lock disc body (4) is rotatably connected to the fixed base (3). The lock disc body (4) includes a lock body, a sealing ring, a sealing spring, a lock tongue, and a locking spring. The sealing ring and the sealing spring are slidably mounted on the lock body. The lock tongue is slidably connected to the lock body, and the sliding direction of the lock tongue is perpendicular to the axis of the lock body. The locking spring is installed between the lock tongue and the lock body. A pressure sensor (501) is installed in the detection box (201). A proximity switch (502) is installed at the farthest end of the sliding distance of the lock tongue. A pressurizing assembly is provided on the detection box (201). A piston rod (602) is provided on the pressurizing assembly. The two ends of the piston rod (602) are respectively connected to the lock disc body (4) and the detection box (201). A motor (503) is installed on the mounting bracket (1). A push rod (504) is slidably connected on the mounting bracket (1). The motor (503) drives the push rod (504) to push the lock disc body (4) to swing towards the oil port (202). The pressurizing assembly includes a piston cylinder (601) and a cup (603). The piston cylinder (601) is mounted on a detection box (201). The detection box (201) has a gas storage chamber (203) inside. The piston cylinder (601) has a pressurizing chamber (604) inside. The lower end of the pressurizing chamber (604) is connected to the gas storage chamber (203). The piston rod (602) is slidably connected inside the piston cylinder (601). The cup (603) is mounted on the lower end face of the piston rod (602). The cup (603) is frustoconical in shape, and the larger end of the cup (603) faces downward. The detection box (201) is also provided with a detection chamber (204), which is connected to the detection oil port (202). A trigger switch (605) is installed between the detection chamber (204) and the gas storage chamber (203). A trigger groove (606) is provided on the trigger switch (605). A trigger block (607) is slidably connected in the trigger groove (606). A trigger spring (608) is installed in the trigger groove (606). The two ends of the trigger spring (608) are respectively connected to the trigger block. (607) is connected to the inner wall of the trigger groove (606). The end of the trigger block (607) away from the trigger spring (608) is in contact with the lock tongue. The trigger switch (605) and the trigger block (607) are both provided with trigger channels (609). When the lock tongue is pushed out, the trigger channel (609) on the trigger block (607) and the trigger channel (609) on the trigger switch (605) are coaxial. The two ends of the trigger channel (609) are respectively connected to the detection chamber (204) and the air storage chamber (203).

2. The motorcycle fuel tank lock disc durability testing fixture according to claim 1, characterized in that: The side of the diaphragm (603) that contacts the inner wall of the piston cylinder (601) is provided with a sealing surface (701), and the angle between the sealing surface (701) and the inner wall of the piston cylinder (601) is in the range of 15° to 30°.

3. The motorcycle fuel tank lock disc durability testing fixture according to claim 2, characterized in that: A support ring (702) is coaxially provided on the sealing surface (701). The outer wall of the support ring (702) is slidably connected to the inner wall of the piston cylinder (601). A spring ring (703) is provided inside the support ring (702).

4. The motorcycle fuel tank lock disc durability testing fixture according to claim 1, characterized in that: A valve body (801) is installed between the pressurization chamber (604) and the gas storage chamber (203). The central axis of the valve body (801) is parallel to the central axis of the piston cylinder (601). The inner wall of the valve body (801) is conical, with the larger end of the cone facing upward. A valve ball (802) and a buffer spring (803) are provided inside the valve body (801). The valve ball (802) is in contact with the inner wall of the valve body (801). The two ends of the buffer spring (803) are connected to the upper end of the valve ball (802) and the upper end of the valve body (801), respectively.

5. The motorcycle fuel tank lock disc durability testing fixture according to claim 1, characterized in that: A cam (505) is mounted on the shaft of the motor (503), and a slide plate (506) is mounted on the lower end face of the push rod (504). The slide plate (506) is arc-shaped, and the cam (505) is in rolling connection with the lower end face of the slide plate (506).

6. The motorcycle fuel tank lock disc durability testing fixture according to claim 5, characterized in that: A permanent magnet (507) is installed on the upper surface of the slide plate (506), and the mounting frame (1) is made of magnetic material.

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