Anti-impact tread surface sweeper

Abstract

This utility model provides an anti-impact tread cleaner. A connecting seat is hinged to a piston rod, and a buffer sleeve is installed in the hinge hole. The piston rod has a mounting hole, into which a spring rod is inserted. The spring rod has a spring seat at its front end and is installed in a mounting hole on the rear cylinder head at its rear end. A return spring is sleeved on the spring rod, with its front end abutting against the spring seat on the piston rod and its rear end abutting against a gasket installed in the piston rod mounting hole. Each tooth of the rack has a trapezoidal cross-section, with the angle of the force-bearing surface on both sides being 73° to 77°. The angle of the side of the limiting pin that mates with the force-bearing surface is the same as the angle of the force-bearing surface. An exhaust hole is provided near the connecting seat at the end of the piston rod, and a first filter screen is provided on the exhaust hole. An air inlet is provided on the rear cylinder head, and a second filter screen is installed in the air inlet. This design prevents the rack from deforming upon abnormal impact, allowing the tread cleaner to operate normally. The filter screen can be reused after replacement, and the overall buffer sleeve increases the deflection angle of the connecting seat connected to the grinding wheel.

Description

Technical Field

[0001] This utility model belongs to the field of rail transit technology, and in particular relates to a tread cleaner for mitigating and suppressing wear and vibration between wheels and tracks. Background Technology

[0002] As the operating speed of high-speed trains increases, the wear and vibration conditions between the wheels and the tracks intensify, leading to non-circular wear of the wheels (polygonal wheels), which in turn causes abnormal vibration, noise, and the risk of loosening, detachment, and cracking of bogie components.

[0003] The existing tread sweeper rack is thin and lacks material strength. Furthermore, the angle between the rack and the limit pin is not suitable. When subjected to abnormal impact, the rack is prone to deformation, causing the tread sweeper to malfunction. The filter screen is made of resin and is placed directly into the piston rod mounting hole, making it easy to fall off. It cannot be reused and is difficult to clean after clogging, resulting in a prolonged piston rod reset time. The buffer sleeve at the hinge between the grinding disc connecting seat and the piston rod is a separate type, causing uneven wear of the grinding disc and other major problems. Utility Model Content

[0004] This invention aims to alleviate or suppress the formation of polygonal wheel shapes, further improving the operational quality and safety reliability of high-speed trains. The tread cleaner can function normally when subjected to an accidental impact.

[0005] To achieve the aforementioned utility model objectives, this utility model provides a tread sweeper, comprising a housing, a grinding element, a piston rod, a connecting seat, a rack and pinion clearance adjustment device, a large dust cover, and a front cylinder head and a rear cylinder head connected to both ends of the housing. The grinding element is connected to the piston rod via the connecting seat. An inner cylinder is located within the housing, and the piston rod extends through the front cylinder head into the inner cylinder and can reciprocate axially. The rack and pinion clearance adjustment device includes a rack and a corresponding limiting pin. A rack is positioned in a groove on the upper part of the piston rod, allowing it to slide axially along the groove. The connecting seat is hinged to the piston rod, and a buffer sleeve is installed in the hinge hole. The piston rod has a mounting hole, into which a spring rod is inserted. The spring rod has a spring seat at its front end and is mounted in a mounting hole on the rear cylinder head. A spring is fitted onto a spring rod, with the front end of the return spring abutting against a spring seat on the piston rod and the rear end abutting against a washer installed in the piston rod mounting hole. Each tooth of the rack has a trapezoidal cross-section, with the angle of the force-bearing surface on both sides being 73°–77°. The angle of the side of the limiting pin that mates with the force-bearing surface is the same as the angle of the force-bearing surface. A first groove is provided at the front end of the front cylinder head, and a second groove is provided between the piston rod end and the connecting seat. The large dust cover is secured between the first and second grooves. An exhaust port is provided near the connecting seat end of the piston rod, and four layers of stainless steel first filter screens are provided on the exhaust port. An air intake port for gas entering the inner cylinder is provided on the rear cylinder head, and a second filter screen is installed in the air intake port.

[0006] Furthermore, the first filter screen has 20-30 mesh outer filter screens on both sides for coarse filtration and support, and multiple layers of 40-50 mesh inner filter screens in the middle. The first filter screen is vertically installed inside the piston rod exhaust hole, and the outer side of the first filter screen is threadedly connected to the exhaust hole.

[0007] Furthermore, the inner layer of the buffer sleeve is a stainless steel tube, the outer layer is a rubber layer, the middle section of the outer side of the stainless steel tube is a convex arc-shaped section, and the rubber layer and the arc-shaped section are vulcanized together.

[0008] Positive effects: By changing the angle of the rack's force-bearing surface, deformation of the rack is prevented when subjected to abnormal impacts, allowing the tread sweeper to operate; the first filter screen is made of stainless steel with a multi-layer stainless steel tube structure, allowing the modified filter screen to be reused and easy to clean, and is connected to the piston rod via threads, making it less prone to falling off; the overall buffer sleeve has a reduced volume of outer rubber, allowing for a larger deflection angle of the connecting seat for the grinding wheel, reducing uneven wear of the grinding wheel, and the improvement is low-cost and has a wide range of applications. Attached Figure Description

[0009] Figure 1 This is a front view of the tread sweeper;

[0010] Figure 2 This is a top view of the tread sweeper:

[0011] Figure 3 This is a diagram showing the fit between the limit pin and the rack;

[0012] Figure 4 This is a schematic diagram of the first filter screen;

[0013] Figure 5 yes Figure 4 A schematic diagram of the AA cross-section;

[0014] Figure 6 This is a schematic diagram of the buffer sleeve structure;

[0015] Figure 7 This is a side view of the buffer sleeve;

[0016] In the diagram, 1. Housing; 2. Rack; 3. Limiting pin; 4. Rack clearance adjustment device; 5. Front cylinder head; 6. Piston rod; 7. Connecting seat; 8. Grinding wheel; 9. First filter screen; 10. Spring seat; 11. Return spring; 12. Washer; 13. Retaining ring; 14. Rear cylinder head; 15. First slot; 16. Large dust cover; 17. Bolt; 18. Disc spring; 19. Expansion sleeve; 20. Retaining ring; 21. Buffer sleeve; 22. First washer; 23. Second washer; 24. Connecting nut; 25. Cotter pin; 26. Spring rod; 27. Second slot; 28. Inner cylinder; 29. ​​Second filter screen. Detailed Implementation

[0017] Combination Figure 1 and Figure 2 This utility model of a treadmill cleaner includes a housing 1, a grinding element 8, a piston rod 6, a connecting seat 7, a rack and pinion clearance adjustment device 4, a large dust cover 16, and a front cylinder cover 5 and a rear cylinder cover 14 connected to both ends of the housing. The grinding element 8 is connected to the piston rod 6 through the connecting seat 7. The housing contains an inner cylinder 28, and the piston rod 6 extends into the inner cylinder 28 through the front cylinder cover 5 and can reciprocate axially. The rack and pinion clearance adjustment device 4 includes a rack and a limiting pin 3 that cooperates with it. A rack 2 is provided in a sliding groove on the upper part of the piston rod 6, and the rack 2 can slide axially along the sliding groove. The connecting seat 5 is hinged to the piston rod 4. A buffer sleeve 21 is installed inside the hinge hole. The piston rod 4 has a mounting hole, and the spring pull rod 26 is inserted into the mounting hole. Its front end has a spring seat 10, and its rear end is installed in the mounting hole on the rear cylinder head. The return spring 11 is fitted onto the spring pull rod 26. The front end of the return spring 11 abuts against the spring seat 10 on the piston rod, and the rear end abuts against the gasket 12 installed in the piston rod mounting hole. The cross-sectional shape of each tooth of the rack 2 is trapezoidal, and the angle of the force-bearing surface on the two sides is 73° to 77°. The angle of the side of the limiting pin that mates with the force-bearing surface is the same as the angle of the force-bearing surface, so that they can form surface contact. The angle of the force-bearing surface is 73° to 77° so that the tread sweeper can disengage in time when subjected to abnormal impact, preventing the rack from deforming. The front cylinder head has a first slot 15 at its front end, and a second slot 27 between the piston rod end and the connecting seat. The large dust cover 16 is secured between the first slot 15 and the second slot 27. An exhaust port is located near the connecting seat end of the piston rod, and four layers of stainless steel first filter screens 9 are installed on the exhaust port. The rear cylinder head has an intake port for gas entering the inner cylinder, and a second filter screen 29 is installed in the intake port. The second filter screen 29 is used to filter the gas entering the inner cylinder.

[0018] The first filter screen 9 has 20-30 mesh outer filter screens 901 on both sides for coarse filtration and support, and two (or more) layers of 40-50 mesh inner filter screens 902 in the middle. The first filter screen is vertically installed inside the piston rod exhaust hole, and the outer side of the first filter screen is threaded to the exhaust hole. The first filter screen is reusable and easy to clean, and its threaded connection to the piston rod prevents it from easily falling off. The first filter screen is used to filter the gas entering the front end when the piston rod moves.

[0019] The inner layer of the buffer sleeve 21 is a stainless steel tube 211, and the outer layer is a rubber layer 212. The middle section of the outer side of the stainless steel tube is a convex arc-shaped section 213. The rubber layer and the arc-shaped section 213 are vulcanized together. The arc-shaped section 213 can increase the vulcanization bonding area, and the volume of the rubber on the outer side of the buffer sleeve is reduced, so that the deflection angle of the connecting seat 7 connecting the grinding tool 8 is increased.

[0020] The piston rod 6 has its hinged end inserted into the connecting seat 7. A buffer sleeve 21 is installed at the hinged end. A bolt passes through the connecting seat 7 and the buffer sleeve 21, and is then secured to the outside by a connecting nut. The connecting nut has a cotter pin 25. A retaining ring 20 and a tension sleeve 19 are provided between the upper part of the buffer sleeve 21 and the inner wall of the connecting seat 7. A disc spring 18 is provided outside the tension sleeve 19. A first washer 22 and a second washer 23 are provided between the lower part of the buffer sleeve 21 and the inner wall of the connecting seat 7.

[0021] The action process is as follows:

[0022] Extension process: Compressed air is introduced into the air passage of the rear cover 14, and then into the air chamber. The gas pushes the piston rod 6 forward, and the piston rod 6 extends to press the mounting base along with the grinding wheel tread onto the wheel tread for cleaning. At this time, the return spring 11 is compressed, and the piston rod 6 drives the rack 2 to move forward. As wear increases, the distance the piston rod 6 moves forward increases, and the lower end of the limit pin 3 engages with the teeth on the rack 2 successively.

[0023] Retraction process: After depressurization, under the action of the return spring 11, the piston rod 6 moves backward. The retraction of the piston rod 6 drives the connecting seat 7 and the grinding wheel 8 away from the wheel. At this time, the lower end of the limit pin 3 forms a self-locking mechanism with the left oblique tooth surface of the rack 2, preventing the rack from moving to the left with the piston rod. When the right end of the slide groove on the piston rod abuts against the right end of the rack, the piston rod 6 stops moving, thereby controlling the retraction and reset distance of the piston rod, keeping the distance between the connecting seat 7 of the grinding wheel 8 and the wheel at a certain distance, achieving the purpose of flexibly adjusting the clearance.

Claims

1. A tread cleaner comprising a housing (1), an abrasive (8), a piston rod (6), a connecting seat (7), a rack gap adjusting device (4), a large dust cover (16), and a front cylinder cover (5) and a rear cylinder cover (14) connected to both ends of the housing, the abrasive (8) being connected to the piston rod (6) through the connecting seat (7), the housing having an inner cylinder (28), the piston rod (6) extending into the inner cylinder (28) through the front cylinder cover (5) and being axially reciprocable, the rack gap adjusting device (4) comprising a rack and a limiting pin (3) cooperating with the rack, a rack (2) being arranged in a sliding groove in the upper part of the piston rod (6), the rack (2) being axially slidable along the sliding groove, characterized in that, The connecting seat (7) is hinged to the piston rod (6), and a buffer sleeve (21) is installed in the hinge hole. The piston rod (6) has a mounting hole, and the spring pull rod (26) is inserted into the mounting hole. Its front end has a spring seat (10), and its rear end is installed in the mounting hole on the rear cylinder head. The return spring (11) is sleeved on the spring pull rod (26). The front end of the return spring (11) abuts against the spring seat (10) on the piston rod (6), and the rear end abuts against the gasket (12) installed in the mounting hole of the piston rod (6). The cross-sectional shape of each tooth of the rack (2) is trapezoidal, and the angle of the force-bearing surface on the two sides is 73° to 77°. The angle of the side of the limiting pin (3) that cooperates with the force-bearing surface is the same as the angle of the force-bearing surface; the front cylinder head (5) is provided with a first slot (15) at the front end, and a second slot (27) is provided between the end of the piston rod (6) and the connecting seat (7). The large dust cover (16) is stuck between the first slot (15) and the second slot (27). The end of the piston rod (6) near the end of the connecting seat (7) is provided with an exhaust hole, and four layers of stainless steel first filter screen (9) are provided on the air hole; the rear cylinder head (14) is provided with an air inlet for the gas to enter the inner cylinder, and a second filter screen (29) is installed in the air inlet.

2. A tread cleaner as claimed in claim 1 wherein: The first filter screen (9) has 20-30 mesh outer filter screens (901) on both sides for coarse filtration and support, and multiple layers of 40-50 mesh inner filter screens (902) in the middle. The first filter screen is vertically installed inside the piston rod exhaust hole, and the outer side of the first filter screen is threaded to the exhaust hole.

3. A tread cleaner as claimed in claim 1 wherein: The inner layer of the buffer sleeve is a stainless steel tube (211), and the outer layer is a rubber layer (212). The middle section of the outer side of the stainless steel tube (211) is a convex arc-shaped section (213). The rubber layer (212) and the arc-shaped section (213) are vulcanized together.

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