Crawler track link impact test equipment
By designing a track link impact testing device and utilizing a combination of various components, accurate testing of track links under dynamic impact conditions was achieved. This solved the problem that existing testing methods could not accurately predict impact conditions, thus improving the accuracy of the test and the safety of the equipment.
Patent Information
- Application Number
- CN202423228625.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-26
AI Technical Summary
In the existing technology, the static testing method of track links cannot accurately predict their performance under dynamic impact conditions. The simple impact test has large errors and is difficult to simulate the stress state under real service scenarios, making it difficult to prevent defective products.
An impact testing device for track links was designed, comprising a base plate, a test frame, a support frame, a shaped mounting plate, a pushing component, a toggle component, a linkage mechanism, an adjustment mechanism, a sliding mechanism, and an impact mechanism. Through the combination of a two-stage electric push rod, a first slider, a circular fixed block, a shaft frame, an auxiliary rod, a first spring, a sliding block, a threaded hole, a shaped frame, and screws, kinetic energy transmission and impact force adjustment are achieved.
It enables precise testing of track links under dynamic impact conditions, improving the accuracy and reliability of testing and ensuring the safety and efficiency of equipment.
Smart Images

Figure CN223538493U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of track link testing technology, specifically a track link impact testing device. Background Technology
[0002] In modern industry and the military, tracked machinery plays a crucial role. From bustling construction sites to harsh military combat environments, tracked equipment such as excavators, bulldozers, and tanks are ubiquitous. As a core component of the locomotive system of these machines, the quality and performance of the track links directly affect the reliability, safety, and service life of the entire machine.
[0003] Traditional testing methods in current technology mostly focus on static parameter measurement, such as basic items like dimensional accuracy and hardness testing. However, static testing alone cannot accurately predict the performance of track links under dynamic impact conditions. Some simple impact tests only use simple tools to manually simulate low-frequency, low-energy impacts, resulting in large data errors and unreliable test results. They are unable to simulate the stress state of track links in real service scenarios. Through long-term use and observation, it has been found that rigorous impact testing of tracks can effectively prevent the production of defective products.
[0004] Therefore, this utility model provides a track link impact testing device. Utility Model Content
[0005] To overcome the shortcomings of existing technologies and solve at least one of the problems mentioned in the background art, a track link impact testing device is proposed.
[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A track link impact testing device of this utility model includes a base plate, a test frame, a first support frame, a first baffle, a shaped mounting plate, a pushing component, a shifting component, a linkage mechanism, an adjustment mechanism, a sliding mechanism, and an impact mechanism. The top of the base plate is fixedly installed with the test frame. Two sets of the first support frame are provided, and the two sets of the first support frame are threadedly connected to the top of the base plate. One set of the first support frame has its end away from the base plate threadedly connected to the shaped mounting plate, and the other set of the first support frame has its end away from the base plate threadedly connected to the first baffle. The first baffle is movably installed with the shaped mounting plate. An impact mechanism is provided on the side of the shaped mounting plate near the first baffle. The impact mechanism is used to perform impact testing on the track link. A linkage mechanism is provided on the side of the shaped mounting plate near the first baffle. The linkage mechanism can provide kinetic energy to the impact mechanism so that it can impact. A sliding mechanism is provided on the side of the shaped mounting plate near the first baffle. The sliding mechanism, in cooperation with the actuating component, enables the linkage mechanism to store force. The actuating component is located on the side of the irregularly shaped mounting plate near the first baffle. This actuating component, through snap-fit, allows the linkage mechanism to move. A pushing component is located on the side of the irregularly shaped mounting plate near the first baffle. This pushing component pulls the actuating component to move it in an orderly manner. An adjusting mechanism is located on the side of the irregularly shaped mounting plate near the first baffle. This adjusting mechanism, in cooperation with the linkage mechanism, allows the stored force of the linkage mechanism to be released. The pushing component includes a second support frame and a dual-stage electric push rod. The second support frame is threadedly connected to the side of the irregularly shaped mounting plate near the first baffle. The dual-stage electric push rod is movably mounted on the inner wall of the second support frame. The second support frame provides stable support for the dual-stage electric push rod, ensuring that it does not wobble during use. The dual-stage electric push rod, through its two-stage extension and retraction, allows the first slider to move up and down, thereby driving the sliding block to move together.
[0007] Preferably, the actuating assembly includes a first slider and a circular fixing block. The first slider is slidably mounted on the side of the irregularly shaped mounting plate near the first baffle. One side of the first slider is rotatably mounted to the output end of the dual-stage electric push rod via a rotating shaft. The circular fixing block is fixedly mounted on one side of the first slider. In this design, the first slider allows the circular fixing block to move smoothly. At the same time, the special structure of the irregularly shaped mounting plate itself provides a more stable working space for the movement of the first slider. The circular fixing block can drive the sliding block through the drive of the first slider, ensuring the effective transmission of power to the first slider.
[0008] Preferably, the linkage mechanism includes a shaft frame, an auxiliary rod, a first spring, and a sliding block. The shaft frame is fixedly installed on the side of the irregular mounting plate near the first baffle. The shaft frame is located on one side of the second support frame. The side of the shaft frame near the first slider is fixedly installed with the auxiliary rod. One end of the first spring is fixedly installed with the shaft frame. The first spring is located on the surface of the auxiliary rod. The end of the first spring away from the shaft frame is fixedly installed with the sliding block. The sliding block is slidably installed on the side of the irregular mounting plate near the first baffle. In this scheme, the shaft frame can provide stable support for the auxiliary rod and the first spring, ensuring their safe use. The auxiliary rod can provide a guiding function for the first spring, preventing it from twisting when squeezed. The combined use of the first spring and the sliding block can cause the first spring to move upward through the drive of the first slider and the circular fixed block, thus compressing the first spring and storing force.
[0009] Preferably, the adjustment mechanism includes threaded holes, a shaped bracket, and screws. Several sets of threaded holes are provided, and these sets of threaded holes are longitudinally arranged on one side of the shaped mounting plate. The shaped bracket is threadedly connected to the shaped mounting plate by screws. In this design, the threaded holes provide different installation positions for the shaped bracket, ensuring the adjustability of the impact device. The combined use of the shaped bracket and screws allows for adjustment of the impact force by adjusting the height of the shaped bracket, thus improving the practicality of the device.
[0010] Preferably, the sliding mechanism includes a sliding rod, a second spring, a protrusion, and a sliding block. The sliding block has a rectangular slot on the side near the circular fixed block. The sliding rod extends through the inner wall of the sliding block and is movably connected to it. One end of the second spring is fixedly installed to the sliding block, and the second spring is located on the surface of the sliding rod. The other end of the second spring is movably installed to the protrusion. The side of the protrusion near the second spring is fixedly installed to the sliding rod. The sliding block is fixedly installed on one side of the protrusion. In this design, the sliding rod allows the protrusion to retract more effectively, ensuring it does not shift when compressed. The second spring allows the compressed protrusion to quickly reset, ensuring the overall operational stability of the equipment. The cooperation between the protrusion and the sliding block allows the sliding block to move while contacting the circular fixed block. Simultaneously, when the protrusion is in contact with the inclined surface of the irregular frame, the protrusion is pressed inward by the irregular frame until it detaches from the circular fixed block, ultimately releasing the stored force of the first spring.
[0011] Preferably, the impact mechanism includes an impact rod, a limiting ring, and a circular stop. The impact rod is fixedly installed on the side of the sliding block away from the axle frame. The limiting ring is fixedly installed on the surface of the impact rod. The circular stop is fixedly installed on the side of the irregular mounting plate near the first baffle. The circular stop is located below the limiting ring. In this design, the impact rod can impact the track through the rapid descent of the sliding block, ensuring that the equipment can be tested normally and stably. The combined use of the limiting ring and the circular stop can block the rapidly descending impact rod, preventing it from rushing out of the designated position and causing injury. This ensures the safety of the equipment while also improving the overall efficiency.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. The track link impact testing device of this utility model, through the arrangement of a second support frame, a dual-stage electric push rod, a first slider, and a circular fixed block, enables the second support frame to provide stable support for the dual-stage electric push rod, ensuring that the dual-stage electric push rod will not wobble during use. The dual-stage electric push rod can move the first slider up and down through its two-stage extension and retraction, thereby driving the sliding block to move together. The first slider enables the circular fixed block to move smoothly. At the same time, the special structure of the irregular mounting plate itself provides a more stable working space for the movement of the first slider. The circular fixed block can drive the sliding block through the drive of the first slider, ensuring the effective transmission of power of the first slider.
[0014] 2. The track link impact testing device of this utility model, through the arrangement of a shaft frame, auxiliary rod, first spring, sliding block, threaded hole, irregular frame and screw, enables the shaft frame to provide stable support for the auxiliary rod and the first spring, ensuring their safe use. The auxiliary rod provides a guiding function for the first spring, preventing it from twisting when compressed. The cooperation between the first spring and the sliding block enables the first slider to move upward through the drive of the circular fixed block, causing the first spring to be compressed and store force. The opening of the threaded hole provides a different height installation position for the irregular frame, ensuring the adjustability of the impact device. The cooperation between the irregular frame and the screw allows the impact force to be adjusted by adjusting the height of the irregular frame, improving the practicality of the device. Attached Figure Description
[0015] The present invention will be further described below with reference to the accompanying drawings.
[0016] Figure 1 This is a front perspective view of the present invention;
[0017] Figure 2 This is a half-sectional view of the interior of the irregularly shaped mounting plate in this utility model;
[0018] Figure 3 This is a schematic diagram of the internal structure of the irregularly shaped mounting plate in this utility model;
[0019] Figure 4 This is a utility model Figure 3 Enlarged view of a portion of point A in the middle;
[0020] Figure 5 This is a utility model Figure 2 Enlarged view of a section at point B in the middle;
[0021] Figure 6 This is a schematic diagram of the irregularly shaped mounting plate structure in this utility model.
[0022] Legend:
[0023] 1. Base plate; 2. Test frame; 3. First support frame; 4. First baffle; 5. Irregularly shaped mounting plate; 6. Pushing assembly; 601. Second support frame; 602. Two-stage electric push rod; 7. Actuating assembly; 701. First slider; 702. Circular fixing block; 8. Linkage mechanism; 801. Shaft frame; 802. Auxiliary rod; 803. First spring; 804. Sliding block; 9. Adjustment mechanism; 901. Threaded hole; 902. Irregularly shaped frame; 903. Screw; 10. Sliding mechanism; 1001. Slide rod; 1002. Second spring; 1003. Protrusion; 1004. Sliding block; 11. Impact mechanism; 1101. Impact rod; 1102. Limiting ring; 1103. Circular stop block. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0025] Specific implementation examples are given below.
[0026] like Figures 1 to 6As shown in the embodiment of this utility model, a track link impact testing device includes a base plate 1, a test frame 2, a first support frame 3, a first baffle 4, a shaped mounting plate 5, a pushing assembly 6, a toggle assembly 7, a linkage mechanism 8, an adjustment mechanism 9, a sliding mechanism 10, and an impact mechanism 11. The top of the base plate 1 is fixedly installed with the test frame 2. Two sets of first support frames 3 are provided, and the two sets of first support frames 3 are threadedly connected to the top of the base plate 1. One set of first support frames 3, with its end away from the base plate 1, is threadedly connected to the shaped mounting plate 5, and the other set of first support frames 3, with its end away from the base plate 1, is threadedly connected to the first baffle 4. The first baffle 4 and the shaped mounting plate 5 are movably installed, with the shaped mounting plate 5 close to the first baffle 4. An impact mechanism 11 is provided on one side of plate 4. The impact mechanism 11 is used to perform impact tests on the track link. A linkage mechanism 8 is provided on the side of the irregular mounting plate 5 near the first baffle 4. The linkage mechanism 8 can provide kinetic energy to the impact mechanism 11 so that it can impact. The linkage mechanism 8 includes a shaft frame 801, an auxiliary rod 802, a first spring 803, and a sliding block 804. The shaft frame 801 is fixedly installed on the side of the irregular mounting plate 5 near the first baffle 4. The shaft frame 801 is located on one side of the second support frame 601. The side of the shaft frame 801 near the first slider 701 is fixedly installed with the auxiliary rod 802. One end of the first spring 803 is fixedly installed with the shaft frame 801. The first spring 803 is located on the auxiliary rod 802. 2. On the surface, the end of the first spring 803 away from the shaft bracket 801 is fixedly installed with the sliding block 804. The sliding block 804 is slidably installed on the side of the irregular mounting plate 5 near the first baffle 4. A sliding mechanism 10 is provided on the side of the irregular mounting plate 5 near the first baffle 4. The sliding mechanism 10 can enable the linkage mechanism 8 to store force through cooperation with the actuating component 7. An actuating component 7 is provided on the side of the irregular mounting plate 5 near the first baffle 4. The actuating component 7 can enable the linkage mechanism 8 to move through a snap-fit connection. The actuating component 7 includes a first slider 701 and a circular fixing block 702. The first slider 701 is slidably installed on the side of the irregular mounting plate 5 near the first baffle 4. One side of the first slider 701 is connected to the actuating component 702. The rotating shaft and the output end of the dual-stage electric push rod 602 are rotatably mounted. The circular fixing block 702 is fixedly mounted on one side of the first slider 701. The irregular mounting plate 5 is provided with a pushing component 6 on the side near the first baffle 4. The pushing component 6 can pull and move the actuating component 7 to make it move in an orderly manner. The irregular mounting plate 5 is provided with an adjustment mechanism 9 on the side near the first baffle 4. The adjustment mechanism 9 can cooperate with the linkage mechanism 8 to release the force stored in the linkage mechanism 8. The pushing component 6 includes a second support frame 601 and a dual-stage electric push rod 602. The second support frame 601 is threadedly connected to the side of the irregular mounting plate 5 near the first baffle 4. The dual-stage electric push rod 602 is movably mounted on the inner wall of the second support frame 601.
[0027] like Figures 1 to 6As shown, the second support frame 601 provides stable support for the dual-stage electric actuator 602, ensuring that the dual-stage electric actuator 602 will not wobble during use. The dual-stage electric actuator 602 can move the first slider 701 up and down through its two-stage extension and retraction, thereby driving the sliding block 804 to move together. The first slider 701 allows the circular fixed block 702 to move smoothly. At the same time, the special structure of the irregularly shaped mounting plate 5 provides a more stable working space for the movement of the first slider 701. The circular fixed block 702 can move smoothly through... The drive of the first slider 701 enables the sliding block 804 to move, ensuring the effective transmission of power to the first slider 701. The shaft frame 801 provides stable support for the auxiliary rod 802 and the first spring 803, ensuring their safe use. The auxiliary rod 802 provides a guide for the first spring 803, preventing it from twisting when squeezed. The combined use of the first spring 803 and the sliding block 804 enables the first slider 701 to move upward through the drive of the circular fixed block 702, causing the first spring 803 to be compressed and store power.
[0028] like Figures 1 to 6 As shown, the adjustment mechanism 9 includes threaded holes 901, a shaped bracket 902, and screws 903. Several sets of threaded holes 901 are longitudinally arranged on one side of the shaped mounting plate 5. The shaped bracket 902 is threadedly connected to the shaped mounting plate 5 by screws 903. The sliding mechanism 10 includes a slide rod 1001, a second spring 1002, a protrusion 1003, and a sliding block 1004. A rectangular slot is provided on the side of the sliding block 804 near the circular fixing block 702. The slide rod 1001 extends through the inner wall of the sliding block 804 and is movably inserted into it. One end of the second spring 1002 is fixedly installed to the sliding block 804. 2 is located on the surface of the slide bar 1001. The other end of the second spring 1002 is movably installed with the protrusion 1003. The side of the protrusion 1003 near the second spring 1002 is fixedly installed with the slide bar 1001. The sliding block 1004 is fixedly installed on one side of the protrusion 1003. The impact mechanism 11 includes an impact rod 1101, a limiting ring 1102 and a circular stop 1103. The impact rod 1101 is fixedly installed on the side of the sliding block 804 away from the shaft frame 801. The limiting ring 1102 is fixedly installed on the surface of the impact rod 1101. The circular stop 1103 is fixedly installed on the side of the irregular mounting plate 5 near the first baffle 4. The circular stop 1103 is located below the limiting ring 1102.
[0029] like Figures 1 to 6As shown, the threaded hole 901 provides different height installation positions for the irregular frame 902, ensuring the adjustability of the impact device. The use of the irregular frame 902 in conjunction with the screw 903 allows for adjustment of the impact force by adjusting the height of the irregular frame 902, improving the practicality of the device. The sliding rod 1001 allows the protrusion 1003 to retract more effectively, ensuring that it does not shift when squeezed. The second spring 1002 allows the squeezed protrusion 1003 to quickly return to its original position, ensuring the overall operational stability of the device. The use of the protrusion 1003 in conjunction with the sliding block 1004 allows for better interaction with the circular fixing block 70. 2. Upon contact, the sliding block 804 moves. Simultaneously, when the protrusion 1003 and the irregular frame 902 are in contact at an angle, the protrusion 1003 is squeezed inward by the irregular frame 902 until it detaches from the circular fixing block 702, thus releasing the stored force of the first spring 803. The impact bar 1101 can impact the track through the rapid descent of the sliding block 804, ensuring that the equipment can be tested normally and stably. The cooperation between the limit ring 1102 and the circular stop 1103 can block the rapidly descending impact bar 1101, preventing it from rushing out of the designated position and causing injury. This ensures the safety of the equipment while also improving the overall efficiency of use.
[0030] Working principle: When using this utility model, first place the base plate 1 in a position convenient for the user to operate. Then, the user places the track to be tested into the test frame 2 and activates the dual-stage electric push rod 602 to retract it. When the dual-stage electric push rod 602 retracts, the first slider 701 is pulled upward by the dual-stage electric push rod 602. When the first slider 701 moves, the circular fixing block 702 will contact the protrusion 1003, causing the sliding block 804 to move upward synchronously with the first slider 701. When the protrusion 1003 moves to a certain extent, it will press the second spring 1002 inward by the same slope as the irregular frame 902. When the protrusion 1003 retracts to a certain extent, it will disengage from the circular fixing block 702. After the protrusion 1003 disengages from the circular fixing block 702, it will be quickly moved downward by the elastic force of the first spring 803 until the impact rod 1101 hits the track. When the impact rod 1101 hits downward, the circular stop block 1103 will pass through the limiting ring. 1102 blocks the impact rod 1101, preventing it from being thrown out due to inertia. While the sliding block 804 slides downward, the second spring 1002 pushes the protrusion 1003 to one side to reset it. Then, the dual-stage electric push rod 602 pushes the first slider 701 downward again. When the circular fixing block 702 moves to the protrusion 1003, it squeezes the protrusion 1003 inward again until the circular fixing block 702 moves to the lower side of the protrusion 1003 and the second spring 1002 resets the protrusion 1003. This process is repeated to achieve the impact test on the track. When it is necessary to test the track with different forces, the user can remove the first support frame 3 and the first baffle 4 in sequence, then unscrew the screw 903 to remove the irregular frame 902, and finally install the irregular frame 902 at a suitable height. The lower the irregular frame 902 is, the smaller the hammering force. Therefore, it can be used to test different types of tracks, making this utility model highly compatible.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A track link impact testing device, comprising a base plate (1), a test frame (2), a first support frame (3), a first baffle (4), a shaped mounting plate (5), a pushing assembly (6), a turning assembly (7), a linkage mechanism (8), an adjustment mechanism (9), a sliding mechanism (10), and an impact mechanism (11); characterized in that: The top of the base plate (1) is fixedly installed with the test frame (2). Two sets of the first support frame (3) are provided, and the two sets of the first support frame (3) are threadedly connected to the top of the base plate (1). One set of the first support frame (3) is threadedly connected to the irregular mounting plate (5) at the end away from the base plate (1), and the other set of the first support frame (3) is threadedly connected to the first baffle (4) at the end away from the base plate (1). The first baffle (4) is movably installed with the irregular mounting plate (5). An impact mechanism (11) is provided on the side of the irregular mounting plate (5) near the first baffle (4). The impact mechanism (11) is used to perform impact tests on the track link. A linkage mechanism (8) is provided on the side of the irregular mounting plate (5) near the first baffle (4). The linkage mechanism (8) can provide kinetic energy to the impact mechanism (11) to make It is capable of impact. The irregular mounting plate (5) is provided with a sliding mechanism (10) on the side near the first baffle (4). The sliding mechanism (10) can enable the linkage mechanism (8) to store force by cooperating with the actuating component (7). The irregular mounting plate (5) is provided with a actuating component (7) on the side near the first baffle (4). The actuating component (7) can enable the linkage mechanism (8) to move by snapping. The irregular mounting plate (5) is provided with a pushing component (6) on the side near the first baffle (4). The pushing component (6) can pull the actuating component (7) to make it move in an orderly manner. The irregular mounting plate (5) is provided with an adjusting mechanism (9) on the side near the first baffle (4). The adjusting mechanism (9) can cooperate with the linkage mechanism (8) to release the force stored by the linkage mechanism (8).
2. The track link impact testing equipment according to claim 1, characterized in that: The pushing assembly (6) includes a second support frame (601) and a dual-stage electric push rod (602); the second support frame (601) is threadedly connected to the side of the irregular mounting plate (5) near the first baffle (4), and the dual-stage electric push rod (602) is movably installed on the inner wall of the second support frame (601).
3. The track link impact testing equipment according to claim 2, characterized in that: The actuating assembly (7) includes a first slider (701) and a circular fixing block (702); the first slider (701) is slidably mounted on the side of the irregular mounting plate (5) near the first baffle (4), and one side of the first slider (701) is rotatably mounted to the output end of the dual-stage electric push rod (602) via a rotating shaft, and the circular fixing block (702) is fixedly mounted on one side of the first slider (701).
4. The track link impact testing equipment according to claim 3, characterized in that: The linkage mechanism (8) includes a shaft frame (801), an auxiliary rod (802), a first spring (803), and a sliding block (804). The shaft frame (801) is fixedly installed on the side of the irregular mounting plate (5) near the first baffle (4). The shaft frame (801) is located on the side of the second support frame (601). The side of the shaft frame (801) near the first slider (701) is fixedly installed with the auxiliary rod (802). One end of the first spring (803) is fixedly installed with the shaft frame (801). The first spring (803) is located on the surface of the auxiliary rod (802). The end of the first spring (803) away from the shaft frame (801) is fixedly installed with the sliding block (804). The sliding block (804) is slidably installed on the side of the irregular mounting plate (5) near the first baffle (4).
5. The track link impact testing equipment according to claim 4, characterized in that: The adjustment mechanism (9) includes a threaded hole (901), a shaped bracket (902), and a screw (903); the threaded hole (901) is provided in several groups, and the several groups of threaded holes (901) are longitudinally provided on one side of the shaped mounting plate (5); the shaped bracket (902) is threadedly connected to the shaped mounting plate (5) by the screw (903).
6. The track link impact testing equipment according to claim 5, characterized in that: The sliding mechanism (10) includes a slide rod (1001), a second spring (1002), a protrusion (1003), and a sliding block (1004). The sliding block (804) has a rectangular slot on one side near the circular fixed block (702). The slide rod (1001) extends through to the inner wall of the sliding block (804). The slide rod (1001) is movably inserted into the sliding block (804). One end of the second spring (1002) is fixedly installed with the sliding block (804). The second spring (1002) is located on the surface of the slide rod (1001). The other end of the second spring (1002) is movably installed with the protrusion (1003). The protrusion (1003) is fixedly installed with the slide rod (1001) on one side near the second spring (1002). The sliding block (1004) is fixedly installed on one side of the protrusion (1003).
7. The track link impact testing equipment according to claim 6, characterized in that: The impact mechanism (11) includes an impact rod (1101), a limiting ring (1102), and a circular stop (1103); the impact rod (1101) is fixedly installed on the side of the sliding block (804) away from the shaft frame (801), the limiting ring (1102) is fixedly installed on the surface of the impact rod (1101), and the circular stop (1103) is fixedly installed on the side of the irregular mounting plate (5) near the first baffle (4), and the circular stop (1103) is located below the limiting ring (1102).