A tread cleaning device having a gap adjustment device

Abstract

This application provides a tread cleaning device with a clearance adjustment mechanism, belonging to the field of rail vehicle equipment technology. The tread cleaning device includes a grinding block, a brake shoe support, a cylinder with a cylinder body and piston rod, a toothed component, and a clearance adjustment mechanism. The clearance adjustment mechanism includes: a movable pin having a first through hole extending along a first direction; a vertical guide movably connected to the movable pin and capable of applying downward pressure to press the movable pin against the toothed component; a horizontal guide having a size smaller than the first through hole and configured to pass through the first through hole along the first direction, allowing the movable pin to reciprocate along the horizontal guide; and a clearance adjustment chamber for accommodating the movable pin, the vertical guide, and the horizontal guide. The tread cleaning device of this application has a simple structure, smooth movement, and high product reliability.

Description

Technical Field

[0001] This application belongs to the field of rail vehicle equipment technology, and relates to the cleaning of wheel treads of rail vehicles, and particularly to a tread cleaning device with a clearance adjustment device. Background Technology

[0002] Tread cleaning devices are typically installed on rail vehicles corresponding to their wheels. They controllably utilize abrasive blocks (or "grinding tools") mounted on them to exert friction on the wheel treads, thereby cleaning the tread surface. This friction helps maintain relatively good adhesion between the wheel and the rail, preventing wheel slippage or coasting during starting, deceleration, or braking. Therefore, tread cleaning devices are one of the important components installed on rail vehicles.

[0003] In traditional tread cleaning devices, as the cylinder continuously drives the abrasive block against the wheel tread, the thickness of the abrasive block gradually decreases, leading to an increase in the gap between the abrasive block and the wheel tread. To maintain a relatively constant gap between the abrasive block and the wheel tread, or within a predetermined range, tread cleaning devices disclosed in Chinese Patent Application No. 200720046476.4 ("Tread Cleaning Device Gap Adjustment Device") and Chinese Patent Application No. CN201910957987.9 ("A Tread Cleaning Device with Gap Adjustment Device") incorporate a gap adjustment device using toothed components to actively adjust the gap between the abrasive block and the wheel tread. Further optimization of such gap adjustment schemes is desired to improve the gap adjustment process. Summary of the Invention

[0004] In order to effectively solve or at least alleviate some of the problems or deficiencies in existing tread cleaning devices, this application provides an improved tread cleaning device.

[0005] According to one aspect of this application, a tread cleaning device is provided, comprising: a grinding block; a brake shoe holder for mounting the grinding block; a cylinder for driving the grinding block to act against the wheel tread in opposite directions, the cylinder including a cylinder body and a piston rod; a toothed member disposed on the piston rod along a first direction; and a clearance adjustment device disposed on the cylinder body along a second direction, the clearance adjustment device comprising: a movable pin having a first through hole extending along the first direction; a vertical guide movably connected to the movable pin and capable of applying downward pressure to press the movable pin against the toothed member; a horizontal guide having a size smaller than the first through hole and configured to pass through the first through hole along the first direction, such that the movable pin can reciprocate along the horizontal guide; and a clearance adjustment chamber for accommodating the movable pin, the vertical guide, and the horizontal guide.

[0006] According to another embodiment or any of the above embodiments of the tread cleaning device, the movable pin further has a blind mounting hole arranged along a second direction, the blind mounting hole communicating with the first through hole; the vertical guide has a second through hole arranged along a first direction; wherein, the first end of the vertical guide is fixedly installed in the gap adjustment chamber, and the second end of the vertical guide is movably installed in the blind mounting hole along the second direction; and the horizontal guide passes through the first through hole and the second through hole and is disposed in the gap adjustment chamber, so that both the movable pin and the vertical guide can reciprocate along the horizontal guide.

[0007] The tread cleaning device according to another embodiment or any of the above embodiments of this application further includes: a vertical return spring disposed between the first end of the vertical guide member and the open end of the movable pin having the mounting blind hole; the vertical return spring elastically applies downward pressure to press the movable pin against the toothed member to engage with the toothed member.

[0008] According to another embodiment or any of the above embodiments of the tread cleaning device, the movable pin further has a blind mounting hole arranged along a second direction, and the blind mounting hole communicates with the first through hole; the vertical guide is configured as a pin return spring; wherein, the pin return spring is disposed below the horizontal guide and in the blind mounting hole.

[0009] According to another embodiment or any of the above embodiments of the tread cleaning device, a friction block is further provided in the mounting blind hole, and the friction block is located between the horizontal guide and the pin return spring.

[0010] According to another embodiment or any of the above embodiments of the tread cleaning device, the first end of the horizontal guide is fixed to the front inner wall of the gap adjustment chamber, and the second end of the horizontal guide is fixed to the rear inner wall of the gap adjustment chamber.

[0011] According to another embodiment or any of the above embodiments of the tread cleaning device, the horizontal guide is configured as a guide bolt, which is screwed from the rear inner wall of the gap adjustment chamber to the front inner wall of the gap adjustment chamber through the bolt hole on the gap adjustment device.

[0012] According to another embodiment or any of the above embodiments of the tread cleaning device, a horizontal return spring is provided between the second end of the horizontal guide and the movable pin; wherein, when the movable pin is disengaged from the toothed member, the horizontal return spring presses the movable pin against the front inner wall of the clearance adjustment chamber; or, when the movable pin is engaged with the toothed member, the horizontal return spring causes the movable pin to press against the toothed member in a first direction.

[0013] According to another embodiment or any of the above embodiments of the tread cleaning device, a spring pad is provided at the contact position between the horizontal return spring and the movable pin.

[0014] The tread cleaning device according to another embodiment or any of the above embodiments of the present application further includes: a manual reset device configured to disengage the movable pin from the toothed member by external force.

[0015] According to another embodiment or any of the above embodiments of the tread cleaning device, the manual reset device includes: a reset rod that is configured to extend through the first through hole above the horizontal guide member, and a gap reset pin connected to the reset rod and pressing the reset rod against the horizontal guide member by an elastic element; wherein the gap reset pin drives the reset rod to move to disengage the movable pin from the toothed member by an external force overcoming the pressure applied by the elastic element.

[0016] According to another embodiment or any of the above embodiments of the tread cleaning device, the gap reset pin has a first end extending into the gap adjustment chamber and a second end extending out of the gap adjustment chamber; wherein, the first end of the gap reset pin is connected to the reset rod, and a dust cover is provided between the second end of the gap reset pin and the outer wall of the gap adjustment chamber.

[0017] The tread cleaning device according to another embodiment or any of the above embodiments of the present application further includes: an elastic pin disposed through the second end of the gap reset pin.

[0018] According to another embodiment or any of the above embodiments of the tread cleaning device, the manual reset device includes: a reset pivot pin, which pivotally passes through the gap adjustment device and extends into the gap adjustment chamber; the reset pivot pin presses against the movable pin during forward pivoting, causing it to overcome the downward pressure exerted by the vertical guide on the movable pin and move upward to disengage from the toothed member; and releases the pressing action on the movable pin during reverse pivoting.

[0019] According to another embodiment or any of the above embodiments of the tread cleaning device, the toothed member has a first toothed surface and a second toothed surface for forming each tooth; the end of the movable pin for engaging with the toothed member has a first pined surface and a second pined surface.

[0020] The meshing angle between the first toothed surface and the first pin inclined surface can guide the toothed member and the movable pin to move forward relative to each other along the first direction; and the meshing angle between the second toothed surface and the second pin inclined surface can restrict the toothed member and the movable pin to move backward relative to each other along the first direction.

[0021] According to another embodiment or any of the above embodiments of the tread cleaning device, during the forward movement of the piston rod, after the movable pin moves forward to contact the front inner wall of the gap adjustment chamber, the first pin slope of the movable pin overcomes the downward pressure provided by the vertical guide under the force transmitted by the first tooth slope of the toothed member and slides between the teeth of the toothed member; and during the backward movement of the piston rod, after the movable pin moves backward to contact the rear inner wall of the gap adjustment chamber, the second pin slope of the movable pin is restricted by the second tooth slope of the toothed member so as to prevent the piston rod from continuing to move backward.

[0022] According to another embodiment or any of the above embodiments of the tread cleaning device, the gap adjustment device includes a gap adjustment device body protruding from the cylinder body; and a mounting end cover; the mounting end cover closes the gap adjustment device body to form the gap adjustment chamber.

[0023] The tread cleaning device of this application embodiment has one or more of the following effects:

[0024] First, the way the movable pin inside the gap adjustment device cooperates with the horizontal guide allows it to achieve the gap adjustment function within the set range more smoothly in the horizontal dimension, avoiding any jamming in the movement process that could cause abnormal operation of the tread cleaning device, resulting in good product reliability.

[0025] Second, the way the movable pin in the clearance adjustment device cooperates with the vertical guide allows it to move more smoothly in the vertical dimension, thereby promoting the transition between the movable pin and the toothed component in the sliding state and the meshing state.

[0026] Third, the toothed components (such as racks) are fixed on the piston rod, so they do not need to move back and forth relative to the piston rod. Even in harsh working conditions, the toothed components will not bend or jam, which improves the reliability of the tread cleaning device and reduces the maintenance of the tread cleaning device.

[0027] Fourth, the gap adjustment device of the tread cleaning device in this application embodiment has a simple structure, is easy to disassemble, and is convenient to maintain;

[0028] Fifth, it facilitates the setting of manual relief components, making relief operations convenient and easy, saving time and effort.

[0029] The above features and operations of this application will become more apparent from the following description and accompanying drawings. Attached Figure Description

[0030] The above and other objects and advantages of this application will become more fully clear from the following detailed description taken in conjunction with the accompanying drawings, wherein the same or similar elements are denoted by the same reference numerals.

[0031] Figure 1 This is a partial cross-sectional view from the front view of a tread cleaning device according to an embodiment of this application.

[0032] Figure 2 This is a front-view cross-sectional view of a gap adjustment device according to an embodiment of this application, wherein the piston rod is in the retracted position.

[0033] Figure 3 This is a front-view cross-sectional view of a gap adjustment device according to an embodiment of this application, wherein the piston rod is in the extended position.

[0034] Figure 4 This is a cross-sectional view from the front view of a gap adjustment device according to an embodiment of this application, wherein the movable pin and the toothed member are in a skipped tooth state.

[0035] Figure 5 This is a cross-sectional view from the front view of a gap adjustment device according to an embodiment of this application, wherein the movable pin is in a manually reset state.

[0036] Figure 6 This is a front-view cross-sectional view of a gap adjustment device according to another embodiment of this application, wherein the piston rod is in the retracted position.

[0037] Figure 7 This is a front-view cross-sectional view of a gap adjustment device according to another embodiment of this application, wherein the piston rod is in the extended position.

[0038] Figure 8 This is a cross-sectional view from the front view of a gap adjustment device according to another embodiment of this application, wherein the movable pin and the toothed member are in a skipped tooth state.

[0039] Figure 9 This is a cross-sectional view from the front view of a gap adjustment device according to another embodiment of this application, wherein the movable pin is in a manually reset state.

[0040] Figure 10 This is a perspective view of the movable pin of a gap adjustment device according to yet another embodiment of this application.

[0041] Figure 11 This is a schematic diagram illustrating the working process of the tread cleaning device according to this application, wherein the piston rod is in the retracted position.

[0042] Figure 12 This is a schematic diagram illustrating the working process of the tread cleaning device according to this application, wherein the piston rod is in the extended position.

[0043] Figure 13 This is a schematic diagram of the working process of the tread cleaning device according to this application, wherein the movable pin and the toothed component are in a skipped tooth state.

[0044] Figure 14 This is a schematic diagram illustrating the working process of the tread cleaning device according to this application, wherein the piston rod is in the retraction process. Detailed Implementation

[0045] The invention will now be described more fully with reference to the accompanying drawings, which illustrate exemplary embodiments thereof. However, the invention may be implemented in various forms and should not be construed as being limited to the embodiments given herein. The foregoing embodiments are intended to make the disclosure herein complete and comprehensive, thereby providing a more thorough and accurate understanding of the scope of the invention.

[0046] Terms such as “comprising” and “including” indicate that, in addition to the components that are directly and explicitly stated in the specification and claims, the technical solution of the present invention does not exclude the presence of other components that are not directly or explicitly stated.

[0047] For ease of explanation, Figures 1 to 14The document defines the corresponding x and y directions, where the direction of the piston rod of the tread cleaning device is defined as the x-direction, and the y-direction is perpendicular to the x-direction. For clarity, the positive x-direction points towards the front end of the tread cleaning device, and correspondingly, the negative x-direction points towards the rear end. Furthermore, the following section will focus on... Figures 1 to 14 In the description, directional terms such as "front" and "back" are defined relative to the x-direction, while directional terms such as "up" and "down" are defined relative to the y-direction. It is important to understand that these directional definitions are used for describing and clarifying relative positions, and they can change accordingly depending on the installation orientation of the tread cleaning device, etc.

[0048] like Figure 1 As shown, a tread cleaning device according to one embodiment of this application can be installed on the wheel of a rail vehicle according to one embodiment of this application. The tread cleaning device 100 has an abrasive block 110, the working surface of which faces the wheel tread. When the tread cleaning device 100 is activated to perform tread cleaning, the abrasive block 110 acts on the wheel tread and generates friction, thereby allowing the wheel to maintain a relatively good adhesion to the track. The specific structure and / or material of the abrasive block 110 are not limiting.

[0049] Continue as Figure 1 As shown, the tread cleaning device 100 also includes a brake shoe support 120, a cylinder 130, etc.; the grinding block 110 is mounted on the brake shoe support 120, and its specific mounting method is not limited. The brake shoe support 120 can be connected to the piston rod 132 of the cylinder 130 through a connecting part (such as a brake shoe support connecting device), for example, the front end of the piston rod 132 is connected to the connecting part through shock-absorbing rubber and a disc spring. In this way, vibration impact can be effectively dampened and uneven wear of the grinding block 110 can be prevented. Therefore, the cylinder 130 can drive the grinding block 110 to act against the wheel tread surface through the connecting part, the brake shoe support 120, etc.

[0050] In one embodiment, the cylinder 130 mainly includes a cylinder body 131 and a piston rod 132, and may also include a guide rod, a return spring, a sealing component, a rear cylinder head, and other components. The intake pressure inside the cylinder body 131 can be controlled, so that the cylinder 130 can controllably output power to make the grinding block 110 act on the wheel tread. The piston rod 132 is located inside the cylinder body 131 and on the central axis of the cylinder body 131 in the x-direction. Under the push of the intake pressure, the piston rod 132 can move as follows: Figure 1The piston rod 132 moves back and forth in the x-direction as shown. When the piston rod 132 moves forward, the cylinder 130 pushes the grinding block 110 towards the wheel tread, reducing the gap between the working surface of the grinding block 110 and the wheel tread until it contacts the wheel tread. When the piston rod 132 moves backward, the grinding block 110 can return to its original position, and the gap between its working surface and the wheel tread is restored. The stroke range of the piston rod 132 mainly determines the size of the gap between the working surface of the grinding block 110 and the wheel tread.

[0051] Considering that the gap size of the grinding block 110 may change during use due to wear of the working surface (for example, as the working surface of the grinding block 110 wears, the gap between its working surface and the wheel tread increases after the grinding block 110 is reset), a gap adjustment device 200 is correspondingly provided on the tread cleaning device 100 to automatically and dynamically adjust the stroke range of the piston rod 132. In this way, the gap size between the working surface of the grinding block 110 and the wheel tread can be adjusted to be relatively consistent, so that the grinding block 110 can contact the wheel tread better or more accurately.

[0052] like Figures 1 to 9 As shown, this type of tread cleaning device also includes a toothed member 140 and a gap adjustment device 200 for achieving gap adjustment. The toothed member 140 is disposed on the piston rod 132 along a first direction X. Specifically, the toothed member 140 can be, for example, a rack, which includes multiple teeth and inter-tooth grooves disposed between the teeth. Each tooth 141 includes a first toothed surface 141a and a second toothed surface 141b, so as to respectively engage with the movable pin 210 to achieve the effect of promoting or hindering movement.

[0053] In one embodiment, the toothed member 151 may be fixedly mounted on the piston rod 132 of the cylinder 130 so that their movements are completely synchronized. Specifically, the toothed member 151 may be detachably fixed to the piston rod 132 by bolts, or it may be integrally machined with the piston rod 132. It will be understood that the way the toothed member 151 is fixed relative to the piston rod 132 is not limiting. In some cases, the toothed member 151 may be regarded as part of the gap adjustment device 150 or a component specifically provided relative to the gap adjustment device 150. In other cases, the toothed member 151 may also be regarded as part of the piston rod 132.

[0054] A clearance adjustment device 200, corresponding to the toothed member 140, is disposed on the cylinder body 131 along the second direction Y. This clearance adjustment device 200 has the following components to cooperate with the toothed member 151 to achieve clearance adjustment. Specifically, it is integrally formed as a clearance adjustment chamber 240, which houses components such as a movable pin 210, a vertical guide 220, and a horizontal guide 230. The movable pin 210 is a component used to engage or disengage with the toothed member 140 to achieve synchronous or asynchronous movement between the two. The vertical guide 220 is movably connected to the movable pin 210 and can apply downward pressure to press the movable pin 210 against the toothed member 140. Therefore, if an external force causes the movable pin 210 to overcome the downward pressure of the vertical guide 220, the movable pin 210 can also disengage from the toothed member 140. In addition, the movable pin 210 also has a first through hole 212 that extends through the first direction X; the horizontal guide 23 has a smaller size than the first through hole 212 so that it is configured to pass through the first through hole 212 along the first direction X, and so that the movable pin 210 can reciprocate along the horizontal guide 230.

[0055] The movable pin 210 has a first pin bevel 211a and a second pin bevel 211b at its end 211 for engaging with the toothed member 140, so as to respectively cooperate with the toothed member 140 to achieve the effect of promoting or hindering movement. Specifically, the engagement angle between the first tooth bevel 141a and the first pin bevel 211a can guide the toothed member 140 and the movable pin 210 to move forward relative to each other along the first direction X; and the engagement angle between the second tooth bevel 141b and the second pin bevel 211b can restrict the toothed member 140 and the movable pin 210 to move backward relative to each other along the first direction X.

[0056] More specifically, during the forward movement of the piston rod 132, after the movable pin 210 moves forward to the front inner wall of the contact gap adjustment chamber 240, the first pin bevel 211a of the movable pin 210 overcomes the downward pressure provided by the vertical guide 220 under the force transmitted by the first tooth bevel 141a of the toothed member 140, and slides between the teeth 141 of the toothed member 140. This achieves asynchronous movement between the movable pin 210 and the toothed member 140, which can further extend its gap adjustment stroke. Furthermore, during the backward movement of the piston rod 132, after the movable pin 210 moves backward to the rear inner wall of the contact gap adjustment chamber 240, the second pin bevel 211b of the movable pin 210 is restricted by the second tooth bevel 141b of the toothed member 140, thereby ensuring synchronous movement of the two and preventing the piston rod 132 from continuing to move backward.

[0057] The engagement between the movable pin and the horizontal guide in this arrangement allows for smoother horizontal adjustment within a set range, preventing any jamming that could lead to pin breakage, bending, or detachment. This ensures high product reliability and provides greater pin freedom of movement, offering a larger clearance adjustment margin. Furthermore, the engagement between the movable pin and the vertical guide allows for smoother vertical movement, facilitating the transition between sliding and engaging states between the movable pin and the toothed component. Since the toothed component (e.g., a rack) is fixed to the piston rod, it does not require back-and-forth movement relative to the piston rod. Even with high cylinder drive torque and harsh operating conditions, the toothed component is unlikely to bend or jam, improving the reliability of the tread cleaning device and reducing maintenance. Moreover, the clearance adjustment device in this embodiment has a simple structure, is easy to disassemble, and is convenient to maintain.

[0058] The following description, in conjunction with the different embodiments shown in the accompanying drawings, describes the specific structure or further modifications of the clearance adjustment device for each tread cleaning device, in order to further improve its product performance, reliability, or for other improvements.

[0059] See appendix Figures 2 to 5 In one embodiment shown, the specific construction of the movable pin, horizontal guide, and vertical guide has been designed and modified. Specifically, the movable pin 210 also has a blind mounting hole 213 disposed along the second direction Y, so as to accommodate the pin return spring 223 serving as the vertical guide 220. Furthermore, the blind mounting hole 213 communicates with the first through hole 212 so that the horizontal guide 230 can still pass through the movable pin 210. At this time, the pin return spring 223 located below the horizontal guide 230 will abut against the horizontal guide 230 and the end of the blind mounting hole 213, thereby applying downward pressure to the movable pin 210 relative to the horizontal guide 230, so that it remains engaged with the toothed member.

[0060] Based on this, a friction block 224 can also be provided in the blind hole 213. The friction block 224 is located between the horizontal guide 230 and the pin return spring 223, thereby providing more stable support for the pin return spring 223 and preventing it from sliding.

[0061] For the horizontal guide 230, its first end 230a can be fixed to the front inner wall of the gap adjustment chamber 240, and its second end 230b can be fixed to the rear inner wall of the gap adjustment chamber 240, so that it is a fixed component in the entire gap adjustment device, and allows the movable pin 210 or even the vertical guide to move about it, so as to provide a stable and extended gap adjustment space.

[0062] Furthermore, the tread cleaning device 10 of this embodiment also has a manual release function. Therefore, a manual reset device 250 is also provided, which is configured to disengage the movable pin 210 from the toothed member 140 by external force. See the appendix for details. Figures 2 to 5 The manual reset device 250 includes a reset rod 251 and a gap reset pin 252. The reset rod 251 is configured to extend above the horizontal guide 230 and through the first through hole 212. The gap reset pin 252 is connected to the reset rod 251 so that it is pressed against the horizontal guide 230 by an elastic element 253. In cases where manual gap adjustment is required, an external force can be applied to the gap reset pin 252 to overcome the pressure applied by the elastic element 253, thereby driving the reset rod 251 to move until the movable pin 210 disengages from the toothed member 140.

[0063] Based on this, to facilitate the application of external force, either manually or mechanically, to the gap reset pin 252, it can be configured to have a first end 252a extending into the gap adjustment chamber 240 and a second end 252b extending out of the gap adjustment chamber 240. The first end 252a of the gap reset pin 252 is connected to the reset rod 251, allowing maintenance personnel to manually or mechanically operate the exposed second end 252b of the gap reset pin 252 to actuate the components within the gap adjustment chamber 240. Simultaneously, to prevent dust from entering the device and causing damage, a dust cover 254 can be installed between the second end 252b of the gap reset pin 252 and the outer wall of the gap adjustment chamber 240. Optionally, a flexible pin 255 can also be installed through the second end 252b of the gap reset pin 252 to allow maintenance personnel to better hold and operate the component.

[0064] Furthermore, to facilitate the assembly of the various components within the clearance adjustment device 200, the clearance adjustment device 200 itself can be designed as a split structure. For example, the clearance adjustment device 200 can be configured to include a clearance adjustment device body 200a protruding from the cylinder body 131 and a mounting end cover 200b, such that the mounting end cover 200b closes the clearance adjustment device body 200a to form a clearance adjustment chamber 240.

[0065] See appendix for further details. Figures 2 to 5 During the clearance adjustment process, the movable pin 210 is initially positioned at the first end 230a of the horizontal guide 230, i.e., in contact with or near the rear inner wall of the clearance adjustment chamber 240. As the piston rod 132 extends, it drives the toothed member 140 forward. The teeth 141 of the toothed member 140 then drive the movable pin 210 forward until it contacts or nears the front inner wall of the clearance adjustment chamber 240. If there is still a clearance between the wheel and the piston rod 132 at this point, although the movable pin 210 cannot move forward further, as the piston rod 132 is driven forward, the toothed member 140 on it will push the movable pin 210 upward to pass over the teeth. This allows the piston rod 132 and the toothed member 140 to continue moving forward until the grinding wheel at the end of the piston rod 132 is in close contact with the wheel. Because the forward movement of the gap adjustment is variable, even if the grinding block 110 wears and becomes thinner, it can still fully act on the wheel tread surface. Only the forward movement stroke of the piston rod 132 needs to be increased accordingly. After the grinding action is completed, it needs to be reset so that the working surface of the grinding block 110 maintains a certain gap with the wheel tread surface. At this time, the piston rod 132 is driven to move the toothed member 140 backward. The teeth 141 of the toothed member 140 also move the movable pin 210 backward until it contacts or approaches the rear inner wall of the gap adjustment chamber 240. At this time, because there is a relatively stable meshing relationship between the side teeth 141 and the movable pin 210, the side teeth 141 cannot move upward and pass over the teeth. Thus, the reduction in the return stroke caused by locking can basically offset the thinning of the grinding block 110, and after reset, the working surface of the grinding block 110 maintains a basically fixed gap range with the wheel tread surface.

[0066] See appendix Figures 6 to 10 In another embodiment shown, the figures also depict designs and modifications to the specific structures of the movable pin, horizontal guide, and vertical guide. Specifically, the movable pin 210 also has a blind mounting hole 213 disposed along the second direction Y, for inserting the vertical guide 220 therein. Furthermore, the blind mounting hole 213 communicates with the first through hole 212, allowing the horizontal guide 230 to still pass through the movable pin 210. The first end 220a of the vertical guide 220 is fixedly mounted within the clearance adjustment chamber 240, and the second end 220b of the vertical guide 220 is movably mounted along the second direction Y within the blind mounting hole 213, with a second through hole 221 extending along the first direction X. In this arrangement, the horizontal guide 230 can pass through both the first through hole 212 and the second through hole 221 within the clearance adjustment chamber 240, allowing both the movable pin 210 and the vertical guide 220 to reciprocate along the horizontal guide 230.

[0067] Regarding the vertical guide 220, in order to promote its vertical movement and return to its original position, a vertical return spring 222 can be provided between the first end 220a of the vertical guide 220 and the open end of the movable pin 210 where the mounting blind hole 213 is provided. The return spring 222 can elastically apply downward pressure to press the movable pin 210 against the toothed member 140.

[0068] Regarding the horizontal guide 230, as a specific installation method, its first end 230a can be fixed to the front inner wall of the gap adjustment chamber 240, and its second end 230b can be fixed to the rear inner wall of the gap adjustment chamber 240, thereby ensuring that it exists as a stable horizontal motion guide rail within the gap adjustment chamber 240. Specifically, as a specific structural form, the horizontal guide 230 can be configured as a guide bolt 231, which is screwed from the rear inner wall of the gap adjustment chamber 240 to the front inner wall of the gap adjustment chamber 240 through the bolt hole on the gap adjustment device 200. This method facilitates the machining and assembly of the part.

[0069] Furthermore, a horizontal return spring 232 can be provided between the second end 230b of the horizontal guide member 230 and the movable pin 210. When the movable pin 210 disengages from the toothed member 140, the horizontal return spring 232 presses the movable pin 210 against the front inner wall of the clearance adjustment chamber 240, placing the movable pin in its initial position. When the movable pin 210 engages with the toothed member 140, the horizontal return spring 232 causes the movable pin 210 to press against the toothed member 140 along the first direction X, thus facilitating close contact and engagement between the two. Additionally, a spring washer can be provided at the contact point between the horizontal return spring 232 and the movable pin 210 to promote close contact and smooth transmission of elastic force.

[0070] Furthermore, the tread cleaning device 10 of this embodiment also has a manual release function. Therefore, a manual reset device 250 is also provided, which is configured to disengage the movable pin 210 from the toothed member 140 by external force. See the appendix for details. Figures 6 to 10 The manual reset device 250 includes a reset pivot pin 256 that pivotally passes through the clearance adjustment device 200 and extends into the clearance adjustment chamber 240. In the event of a few application scenarios requiring manual clearance adjustment, the reset pivot pin 256 can be rotated forward, pressing against the movable pin 210 during the forward pivoting process. This causes the movable pin 210 to overcome the downward pressure exerted by the vertical guide 220 on the movable pin 210 and move upward to disengage from the toothed member 140. The pressing action on the movable pin 210 can be released by reversing its pivoting action.

[0071] Furthermore, to facilitate the assembly of the various components within the clearance adjustment device 200, the clearance adjustment device 200 itself can be designed as a split structure. For example, the clearance adjustment device 200 can be configured to include a clearance adjustment device body 200a protruding from the cylinder body 131 and a mounting end cover 200b, such that the mounting end cover 200b closes the clearance adjustment device body 200a to form a clearance adjustment chamber 240.

[0072] The following will be combined with the appendix Figures 11 to 14 This section outlines the practical application of this tread cleaning device in rail vehicles. During the operation of rail vehicles, it is necessary to periodically clean the treads of their wheels 300 to prevent dust and impurities from affecting the working condition of the wheels. When performing tread cleaning, firstly, a cylinder pushes the piston rod 132 and the brake shoe support and grinding pad located at the front end of the piston rod 132 towards the wheel 300. During this process, the piston rod 132 engages with the movable pin 210 via the toothed member 140, causing the movable pin 210 and piston rod 132 to move along the horizontal guide member 230 in association. This continues until the movable pin 210 moves forward to the front inner wall of the contact gap adjustment chamber 240, at which point the movable pin 210 slides relative to the toothed member 140. This achieves asynchronous movement between the movable pin 210 and the toothed member 140, meaning the movable pin 210 remains at the position of the front inner wall of the contact gap adjustment chamber 240, while the piston rod 132 and toothed member 140 continue to approach the wheel 300 until they contact the wheel, and then the wheel tread cleaning operation begins. After cleaning is completed, to prevent interference from the tread cleaning device during wheel movement, it should be retracted to maintain a certain gap with the wheel. At this point, the piston rod can be reversed. Correspondingly, when the movable pin 210 moves along the horizontal guide 230 in association with the piston rod 132, until the movable pin 210 moves rearward to the rear inner wall of the contact gap adjustment chamber 240, the movable pin 210 is restricted by the toothed member 140 and can no longer move asynchronously with it. Therefore, it can prevent the piston rod 132 from continuing to move rearward.

[0073] The above examples primarily illustrate the tread cleaning device of the present invention. Although only some embodiments of the present invention have been described, those skilled in the art should understand that the present invention can be implemented in many other forms without departing from its spirit and scope. Therefore, the examples and embodiments shown are to be considered illustrative rather than restrictive, and the present invention may cover various modifications and substitutions without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A tread surface cleaning device, comprising: Grinding block (110); Brake shoe holder (120), which is used to mount the grinding block (110); A cylinder (130) is used to drive the grinding blocks (110) to act against the wheel tread in opposite directions. The cylinder (130) includes a cylinder body (131) and a piston rod (132). A toothed member (140) is disposed on the piston rod (132) along a first direction (X); and A clearance adjustment device (200) is disposed on the cylinder body (131) along a second direction (Y), the clearance adjustment device (200) comprising: The movable pin (210) has a first through hole (212) disposed through a first direction (X); A vertical guide (220) is movably connected to the movable pin (210) and is capable of applying downward pressure to press the movable pin (210) against the toothed member (140); A horizontal guide (230) having a smaller size than the first through hole (212) is configured to pass through the first through hole (212) in a first direction (X), such that the movable pin (210) can reciprocate along the horizontal guide (230); and A clearance adjustment chamber (240) is provided for accommodating the movable pin (210), the vertical guide (220), and the horizontal guide (230).

2. The tread cleaning device according to claim 1, characterized in that, The movable pin (210) also has a mounting blind hole (213) disposed along the second direction (Y), the mounting blind hole (213) communicating with the first through hole (212); The vertical guide (220) has a second through hole (221) that extends through the first direction (X); The first end (220a) of the vertical guide (220) is fixedly installed in the gap adjustment chamber (240), and the second end (220b) of the vertical guide (220) is movably installed in the mounting blind hole (213) along the second direction (Y); and the horizontal guide (230) passes through the first through hole (212) and the second through hole (221) and is disposed in the gap adjustment chamber (240), so that the movable pin (210) and the vertical guide (220) can reciprocate along the horizontal guide (230).

3. The tread cleaning device according to claim 2, characterized in that, Also includes: A vertical return spring (222) is disposed between the first end (220a) of the vertical guide (220) and the open end of the movable pin (210) having the mounting blind hole (213); the vertical return spring (222) elastically applies downward pressure to press the movable pin (210) against the toothed member (140).

4. The tread cleaning device according to claim 1, characterized in that, The movable pin (210) also has a mounting blind hole (213) disposed along the second direction (Y), and the mounting blind hole (213) communicates with the first through hole (212); The vertical guide (220) is configured as a pin return spring (223); The pin reset spring (223) is disposed below the horizontal guide (230) and inside the mounting blind hole (213).

5. The tread cleaning device according to claim 4, characterized in that, A friction block (224) is also provided in the mounting blind hole (213), and the friction block (224) is located between the horizontal guide (230) and the pin return spring (223).

6. The tread cleaning device according to any one of claims 2 to 5, characterized in that, The first end (230a) of the horizontal guide (230) is fixed to the front inner wall of the gap adjustment chamber (240), and the second end (230b) of the horizontal guide (230) is fixed to the rear inner wall of the gap adjustment chamber (240).

7. The tread cleaning device according to claim 6, characterized in that, The horizontal guide (230) is configured as a guide bolt (231) which is screwed from the rear inner wall of the gap adjustment chamber (240) to the front inner wall of the gap adjustment chamber (240) via a bolt hole on the gap adjustment device (200).

8. The tread cleaning device according to claim 6, characterized in that, A horizontal return spring (232) is provided between the second end (230b) of the horizontal guide (230) and the movable pin (210); wherein, when the movable pin (210) is disengaged from the toothed member (140), the horizontal return spring (232) presses the movable pin (210) against the front inner wall of the gap adjustment chamber (240); or, when the movable pin (210) is engaged with the toothed member (140), the horizontal return spring (232) causes the movable pin (210) to press against the toothed member (140) in the first direction (X).

9. The tread cleaning device according to claim 8, characterized in that, A spring pad is provided at the contact position between the horizontal return spring (232) and the movable pin (210).

10. The tread cleaning device according to any one of claims 1 to 5, characterized in that, Also includes: A manual reset device (250) is configured to disengage the movable pin (210) from the toothed member (140) by overcoming external force.

11. The tread cleaning device according to claim 10, characterized in that, The manual reset device (250) includes: A reset lever (251) is configured to extend above the horizontal guide (230) through the first through-hole (212), and A gap reset pin (252) is connected to the reset rod (251) and a spring element (253) presses the reset rod (251) against the horizontal guide (230). The gap reset pin (252) drives the reset rod (251) to move by overcoming the pressure applied by the elastic element (253) with external force, so that the movable pin (210) is disengaged from the toothed member (140).

12. The tread cleaning device according to claim 11, characterized in that, The gap reset pin (252) has a first end (252a) extending into the gap adjustment chamber (240) and a second end (252b) extending out of the gap adjustment chamber (240); wherein the first end (252a) of the gap reset pin (252) is connected to the reset rod (251), and a dust cover (254) is provided between the second end (252b) of the gap reset pin (252) and the outer wall of the gap adjustment chamber (240).

13. The tread cleaning device according to claim 12, characterized in that, Also includes: A resilient pin (255) is provided, which passes through the second end (252b) of the gap reset pin (252).

14. The tread cleaning device according to claim 10, characterized in that, The manual reset device (250) includes: a reset pivot pin (256) which pivotally passes through the gap adjustment device (200) and extends into the gap adjustment chamber (240); the reset pivot pin (256) presses against the movable pin (210) during forward pivoting, causing it to overcome the downward pressure exerted on the movable pin (210) by the vertical guide (220) and move upward to disengage from the toothed member (140); and releases the pressing action on the movable pin (210) during reverse pivoting.

15. The tread cleaning device according to any one of claims 1 to 5, characterized in that, The toothed member (140) has a first tooth bevel (141a) and a second tooth bevel (141b) for forming each tooth (141). The end (211) of the movable pin (210) for engaging with the toothed member (140) has a first pin bevel (211a) and a second pin bevel (211b). The meshing angle between the first toothed surface (141a) and the first pin surface (211a) can guide the toothed member (140) and the movable pin (210) to move forward relative to each other along the first direction (X); and the meshing angle between the second toothed surface (141b) and the second pin surface (211b) can restrict the toothed member (140) and the movable pin (210) to move backward relative to each other along the first direction (X).

16. The tread cleaning device according to claim 15, characterized in that, During the forward movement of the piston rod (132), the movable pin (210) moves forward to contact the front inner wall of the gap adjustment chamber (240). The first pin bevel (211a) of the movable pin (210) overcomes the downward pressure provided by the vertical guide (220) under the force transmitted by the first tooth bevel (141a) of the toothed member (140) and slides between the teeth (141) of the toothed member (140). as well as During the rearward movement of the piston rod (132), after the movable pin (210) moves rearward to contact the rear inner wall of the gap adjustment chamber (240), the second pin bevel (211b) of the movable pin (210) is restricted by the second tooth bevel (141b) of the toothed member (140) to prevent the piston rod (132) from continuing to move rearward.

17. The tread cleaning device according to any one of claims 1 to 5, characterized in that, The clearance adjustment device (200) includes a clearance adjustment device body (200a) protruding from the cylinder body (131); and a mounting end cap (200b); the mounting end cap (200b) closes the clearance adjustment device body (200a) to form the clearance adjustment chamber (240).

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