阅读说明：本技术 一种具有间隙调整装置的踏面清扫器 (Tread sweeper with gap adjusting device ) 是由 苟青炳 徐昊 陈逊 万梦 王子晨 于 2019-10-10 设计创作，主要内容包括：本发明提供一种具有间隙调整装置的踏面清扫器,属于轨道车辆装备技术领域。踏面清扫器,包括：研磨块、闸瓦托、气缸和设置在=气缸的气缸体上的间隙调整装置；并且还包括：固定设置在所述气缸的活塞杆上的齿状构件；所述间隙调整装置包括：活动插销,其插销头能够啮合于所述齿状构件；插销座,其被限位于气缸体的间隙调整装置安装孔中；以及弹性构件,其用于向所述插销座施加朝向所述齿状构件的下压力；其中,活动插销的上端被套装在插销座的沿活塞杆的运动方向而设置的导向槽中并且能够跟随其啮合的齿状构件在间隙调整装置安装孔内沿导向槽前后移动。本发明的踏面清扫器结构简单、可靠性好,不会发生齿状构件弯曲、卡滞等问题。(The invention provides a tread sweeper with a gap adjusting device, and belongs to the technical field of railway vehicle equipment. Tread sweeper, comprising: the brake shoe comprises a grinding block, a brake shoe holder, a cylinder and a gap adjusting device arranged on a cylinder body with = cylinder; and further comprising: a toothed member fixedly disposed on a piston rod of the cylinder; the gap adjusting device includes: a movable bolt, the head of which can be engaged with the dentate component; a pin seat which is limited in the clearance adjusting device mounting hole of the cylinder body; and a resilient member for applying a downward force to the latch socket towards the toothed member; the upper end of the movable bolt is sleeved in a guide groove of the bolt seat, which is arranged along the movement direction of the piston rod, and can move back and forth along the guide groove in the clearance adjusting device mounting hole along with a toothed member meshed with the guide groove. The tread sweeper has simple structure and good reliability, and can not cause the problems of bending, clamping stagnation and the like of the tooth-shaped component.)

1. A tread sweeper (10) comprising:

a grinding block (110) for grinding the workpiece,

a brake head (120) for mounting the grinding block (110),

a cylinder (130) for driving the grinding blocks (110) towards each other on the tread of the wheel, and

a gap adjusting device (150) provided on a cylinder block (131) of the cylinder (130);

characterized in that said tread sweeper (10) further comprises: a toothed member (151) fixedly disposed on a piston rod (132) of the cylinder (130);

the gap adjusting device (150) includes:

a movable latch (152) whose latch head (1521) can engage with the toothed member (151);

a plug seat (153) which is limited in a clearance adjusting device mounting hole (139) of the cylinder block (131); and

a resilient member (158) for applying a downward pressure to the latch seat (153) towards the toothed member (151);

wherein the upper end of the movable pin (152) is fitted in a guide groove (1533) of the pin holder (153) provided in the moving direction of the piston rod (132) and the toothed member (151) engaged therewith is movable back and forth along the guide groove (1533) within the gap-adjusting-device fitting hole (139).

2. The tread sweeper (10) according to claim 1, wherein the toothed member (151) is removably fixedly mounted to the piston rod (132) by a toothed member fixing component (1519) or is integrally provided with the piston rod (132).

3. The tread sweeper (10) as set forth in claim 2 wherein a groove is provided on said piston rod (132) opposite said movable latch (152) and said toothed member (151) is secured in said groove.

4. The tread sweeper (10) as set forth in claim 1, wherein said latch seat (153) is configured as a non-rotating component relative to said slack adjuster mounting hole (139).

5. The tread sweeper (10) as recited in claim 4, wherein said latch housing (153) is generally double U-shaped with a stop side (1534) substantially parallel to the direction of movement of said piston rod (132).

6. The tread sweeper (10) as set forth in claim 1 wherein said guide slot (1533) is a T-slot and the upper end of said movable latch (152) is correspondingly configured as a T-joint.

7. The tread sweeper (10) of claim 1, wherein the rod front side (1525) and the rod rear side (1526) of the movable latch (152) are configured to be in surface contact with opposing portions of the inner sidewall of the slack adjuster mount hole (139), respectively.

8. The tread sweeper (10) as set forth in claim 7 wherein during forward movement of said piston rod (132), said movable latch (152) moves forward against an inside wall of one side of said lash adjuster mount hole (139), said movable latch (152) overcoming said downward force and sliding between splines (1512) of said toothed member (151) under force transmitted by the tooth faces of said toothed member (151);

during the backward movement of the piston rod (132), after the movable bolt (152) moves backward to abut against the inner side wall of the other side of the gap adjusting device mounting hole (139), the movable bolt (152) is locked in the corresponding tooth groove (1512) of the tooth-shaped member (151) so as to prevent the piston rod (132) from further moving backward.

9. The tread sweeper (10) as claimed in claim 8, wherein the angle (β 1) of the left engagement face (1523) of the pin head (1521) of the movable pin (152) to the vertical is smaller than the angle (α 1) of the right tooth face (1513) of the tooth (1511) of the toothed member (151) to the vertical; an included angle (beta 2) of a right meshing surface (1524) of a bolt head (1521) of the movable bolt (152) relative to the vertical direction is larger than an included angle (alpha 2) of a left tooth surface (1514) of the tooth (1511) of the toothed component (151) relative to the vertical direction.

10. The tread sweeper (10) as claimed in claim 9, wherein the angle (β 1) of the left engagement face (1523) of the latch head (1521) of the movable latch (152) relative to the vertical is equal to about 15 °, and the angle (α 1) of the right tooth face (1513) of the tooth (1511) of the toothed member (151) relative to the vertical is equal to about 45 °;

an included angle (beta 2) of a right engaging surface (1524) of a plug head (1521) of the movable plug (152) relative to the vertical direction is equal to about 45 degrees, and an included angle (alpha 2) of a left tooth surface (1514) of the tooth (1511) of the toothed member (151) relative to the vertical direction is equal to about 25 degrees.

11. The tread sweeper (10) of claim 1, wherein the tread sweeper (10) further comprises:

a manual release means (154) for disengaging said movable latch (152) from said toothed member (151) by an external force overcoming said depression force; and

a fixing bolt (155) for mounting an inner end of the manual release part (154) between an upper surface (1531) of the latch base (153) and the elastic member (158).

12. The tread sweeper (10) as set forth in claim 11 wherein said retaining bolt (155) passes through an inner end of said manual override member (154) and is threadably secured at its lower end to a locating mounting hole (1532) of said latch block (153);

the lower end of the elastic member (158) abuts against the upper surface of the inner end of the manual release part (154).

13. The tread sweeper (10) of claim 11, wherein the outer end of the manual mitigation member (154) extends from a sidewall of the slack adjuster mounting hole (139).

14. The tread sweeper (10) of claim 11, wherein the gap adjustment device (150) further comprises: a plug cover (159) fixedly installed at an upper end of the gap adjusting means mounting hole (139) and covering the gap adjusting means mounting hole (139);

wherein an upper end of the elastic member (158) abuts against the latch cover (159).

Technical Field

The invention belongs to the technical field of railway vehicle equipment, relates to wheel tread cleaning of a railway vehicle, and particularly relates to a tread cleaner with a gap adjusting device.

Background

Tread sweepers are typically mounted on a rail vehicle in response to the wheels of the rail vehicle and controllably frictionally engage the wheel treads with abrasive blocks (or "grinders") mounted thereon to produce a tread sweeping effect on the vehicle treads. The friction effect can keep a relatively good adhesion state between the wheels and the track, and is beneficial to avoiding the problem that the rail vehicle idles or slides due to insufficient adhesion force between the wheels and the track in the starting, decelerating or braking process. Therefore, tread sweepers are one of the important parts installed in railway vehicles.

In a conventional tread sweeper, as the cylinder is constantly driving the grinding blocks to act on the wheel treads, the thickness of the grinding blocks can be gradually reduced, resulting in an increase in the clearance distance between the grinding blocks and the wheel treads. In order to keep the gap distance between the grinding block and the wheel tread substantially constant or within a predetermined range of values, the tread sweeper disclosed in chinese patent application No. 200720046476.4 entitled "tread sweeper gap adjusting device", chinese patent application No. 200720046475, X entitled "tread sweeper", and chinese patent application No. 201821315907.7 entitled "a high speed motor train unit tread sweeper" and the like is provided with a gap adjusting device using a toothed member to actively adjust the gap between the grinding block and the wheel tread.

In the existing gap adjusting device, a rack slides in a piston rod, and a bolt head is meshed with teeth of the rack to generate relative motion and lock the rack to adjust the gap.

Disclosure of Invention

In order to effectively solve or at least alleviate the problems or the defects of the existing tread sweeper, the invention provides a novel tread sweeper.

According to an aspect of the present invention, there is provided a tread sweeper, comprising:

the grinding block is used for grinding the materials,

a brake head for mounting the abrasive segments,

a cylinder for driving the grinding blocks to act oppositely on the tread of the wheel, an

A gap adjusting device provided on a cylinder block of the cylinder;

the tread sweeper further comprises: a toothed member fixedly disposed on a piston rod of the cylinder;

further, the gap adjusting apparatus includes:

a movable bolt, the head of which can be engaged with the dentate component;

a pin seat which is limited in the clearance adjusting device mounting hole of the cylinder body; and

a resilient member for applying a downward force to the latch socket towards the toothed member;

the upper end of the movable bolt is sleeved in a guide groove of the bolt seat, which is arranged along the movement direction of the piston rod, and the toothed component which can be engaged with the movable bolt along the guide groove moves back and forth in the clearance adjusting device mounting hole.

According to the tread sweeper of one embodiment of the present invention, the toothed member is detachably and fixedly mounted on the piston rod by a toothed member fixing part or is provided integrally with the piston rod.

In a tread sweeper according to a further embodiment or any of the preceding embodiments, the piston rod is provided with a groove facing the movable bolt, and the toothed member is fixed in the groove.

In a further embodiment or any of the preceding embodiments, the pin block is configured as a non-rotating component with respect to the gap adjuster mounting hole.

According to another embodiment of the invention or any embodiment of the invention, the pin seat is a double-U shape and has a limit side surface which is basically parallel to the movement direction of the piston rod.

In accordance with yet another embodiment of the present invention or any of the above embodiments, the guide slot is a T-slot and the upper end of the movable bolt is correspondingly configured as a T-joint.

In the tread sweeper according to the still another or any of the above embodiments, the movable latch has a rod front side and a rod rear side configured to be in surface contact with portions of the inner side wall of the gap adjuster mounting hole that abut against each other.

In a tread sweeper according to a further embodiment or any one of the above embodiments, the movable bolt is moved forward to abut against an inner side wall of one side of the gap adjustment device mounting hole during the forward movement of the piston rod, and the movable bolt overcomes the downward force and slides between tooth grooves of the tooth member under the acting force transmitted by the tooth surface of the tooth member;

in the process of the backward movement of the piston rod, after the movable bolt moves backward to abut against the inner side wall of the other side of the gap adjusting device mounting hole, the movable bolt is locked in the corresponding tooth groove of the toothed component so as to prevent the piston rod from moving backward.

According to the tread sweeper of the further embodiment or any embodiment, the included angle of the left meshing surface of the bolt head of the movable bolt relative to the vertical direction is smaller than the included angle of the right tooth surface of the tooth-shaped component relative to the vertical direction; the included angle of the right meshing surface of the bolt head of the movable bolt relative to the vertical direction is larger than the included angle of the left tooth surface of the tooth of the toothed component relative to the vertical direction.

A tread sweeper according to another or any of the preceding embodiments, wherein the angle of the left engagement surface of the pin head of the movable pin relative to the vertical is equal to about 15 °, and the angle of the right tooth surface of the tooth of the toothed member relative to the vertical is equal to about 45 °;

the right engaging surface of the head of the movable bolt has an angle equal to about 45 ° with respect to the vertical, and the left flank of the teeth of the toothed element has an angle equal to about 25 ° with respect to the vertical.

A tread sweeper according to another embodiment of the present invention or any of the embodiments above, wherein the tread sweeper further comprises:

a manual release means for disengaging the movable bolt from the toothed member by an external force overcoming the depression force; and

a fixing bolt for mounting an inner end of the manual release part between an upper surface of the latch base and the elastic member.

According to the tread sweeper of the embodiment or any embodiment of the invention, the inner end of the fixing bolt and the lower end of the fixing bolt are fastened with the positioning installation hole of the bolt seat in a threaded mode;

the lower end of the elastic component is abutted against the upper surface of the inner end of the manual relieving part.

In a further embodiment or any of the preceding embodiments, the tread sweeper further comprises a manual release member having an outer end extending from a sidewall of the slack adjuster mounting hole.

According to yet another embodiment of the invention or any of the above embodiments, the tread sweeper, wherein the clearance adjustment device further comprises: a plug pin cover fixedly installed at an upper end of the gap adjusting device installation hole and covering the gap adjusting device installation hole; wherein, the upper end of the elastic component is propped against the bolt cover.

The tread sweeper of the embodiment of the invention has one or more of the following effects:

firstly, the toothed member (such as a rack) is fixed on the piston rod and does not need to move back and forth relative to the piston rod, so that the toothed member basically has no problems of bending, clamping stagnation and the like even if the driving torque of a cylinder is large and the working condition environment is poor, the working reliability of the tread sweeper is improved, and the maintenance work of the tread sweeper is reduced;

secondly, the movable bolt can slide back and forth in the guide groove of the bolt seat, so that the clearance adjusting function can be automatically realized, and the problems of breakage, bending, falling off and the like of the bolt can be prevented;

thirdly, the gap adjusting device of the tread sweeper provided by the embodiment of the invention has a simple structure, is easy to disassemble and is convenient to maintain;

fourthly, conveniently set up manual part of alleviating, it is convenient easy to alleviate the operation and become, labour saving and time saving and easy operation.

The above features and operation of the present invention will become more apparent from the following description and the accompanying drawings.

Drawings

The above and other objects and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like or similar elements are designated by like reference numerals.

FIG. 1 is a front view of a tread sweeper showing a partial cross-sectional view of a corresponding slack adjuster, according to one embodiment of the present invention.

FIG. 2 is a top view of a tread sweeper according to one embodiment of the present invention.

FIG. 3 is a right side view of a tread sweeper according to one embodiment of the present invention.

FIG. 4 is a partial cross-sectional view of a tread sweeper clearance adjustment apparatus according to one embodiment of the present invention.

FIG. 5 is a perspective view of a pin block of the gap adjustment apparatus of the tread sweeper according to one embodiment of the present invention.

Fig. 6 is an enlarged view of the engagement state between the movable plug and the toothed member of the gap adjusting apparatus of the embodiment shown in fig. 4.

Description of reference numerals:

10. a tread sweeper, 110, a grinding block, 120 and a brake head,

130. a cylinder, 131, a cylinder block, 132, a piston rod,

139. a gap adjusting device mounting hole 150, a gap adjusting device,

151. tooth-like members, 1511, teeth, 1512, tooth slots,

1513. right tooth surface, 1514, left tooth surface, 1519, tooth member holding part,

152. a movable bolt 1521, a bolt head 1523 and a left engaging surface,

1524. 1525, front side surface of the rod part, 1526 and back side surface of the rod part,

153. a pin seat 1531, a pin seat upper surface 1532, a positioning mounting hole,

1533. guide slots, 1534, limit sides, 154, manual relief features,

155. fixing bolt 158, elastic member 159, latch cover.

Detailed Description

The present invention now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. This invention may, however, be embodied in different forms and should not be construed as limited to the embodiments set forth herein. The embodiments described above are intended to be illustrative of the full and complete disclosure of this invention, and thus, to provide a more complete and accurate understanding of the scope of the invention.

Terms such as "comprising" and "comprises" mean that, in addition to having components which are directly and explicitly stated in the description and claims, the solution of the invention does not exclude other components which are not directly or explicitly stated.

For convenience of illustration, the x-direction, y-direction, and z-direction are defined in fig. 1-6, where the direction in which the piston rod of the tread sweeper is located is defined as the x-direction, the direction in which the tread sweeper is high is defined as the z-direction, and the y-direction is perpendicular to the x-direction and the z-direction. For ease and clarity of description, the positive direction of the x-direction is directed toward the front end of the tread sweeper and, correspondingly, the negative direction of the x-direction is directed toward the rear end of the tread sweeper. Also, in the following description with respect to fig. 1-6, azimuthal terms such as "front" and "rear" are defined with respect to the x-direction, azimuthal terms such as "left" and "right" are defined with respect to the y-direction, and azimuthal terms such as "up" and "down" are defined with respect to the z-direction. It should be understood that these directional definitions are for relative positional description and clarification, and may vary accordingly depending on changes in the mounting orientation of the tread sweeper, etc.

As shown in fig. 1, a tread surface cleaner 10 according to an embodiment of the present invention may be installed corresponding to a wheel of a railway vehicle according to an embodiment of the present invention, and the tread surface cleaner 10 includes a grinding block 110, and when the tread surface cleaner 10 is triggered to perform a tread surface cleaning operation, the grinding block 110 acts on the tread surface of the wheel to generate friction with the tread surface of the wheel, so that a relatively good adhesion state between the wheel and the rail can be maintained. The specific configuration and/or materials, etc. of the abrasive segments 110 are not limiting.

Continuing with FIGS. 1 and 2, tread sweeper 10 further includes brake head 120, air cylinder 130, etc.; the abrasive segments 110 are mounted on the brake head 120 in a manner that is not intended to be limiting. The brake head 120 may be connected to the piston rod 132 of the cylinder 130 by a connecting portion (e.g., a brake head connecting device), etc., and for example, the front end of the piston rod 132 is connected to the connecting portion by a vibration-proof rubber or a disc spring, so that the impact of vibration can be effectively attenuated and the grinding block 110 can be prevented from being worn eccentrically. Therefore, the air cylinder 130 can drive the grinding blocks 110 via the connecting portion, the brake head 120, and the like to be opposed to each other to be frictionally applied to the wheel tread.

In one embodiment, the cylinder 130 mainly includes a cylinder block 131, a piston rod 132, and may further include a guide rod, a return spring, a sealing member, a rear cylinder cover, and the like. The intake pressure inside the cylinder block 131 can be controlled so that the cylinder 130 can controllably output power that causes the grinding block 110 to act on the tread of the wheel. The piston rod 132 is located inside the cylinder block 131 and on the central axis of the cylinder block 131 in the x direction, and under the pushing of the intake pressure, the piston rod 132 can move back and forth in the x direction as shown in fig. 1 and 2; when the piston rod 132 moves forwards, the air cylinder 130 pushes the grinding block 110 and the like to move opposite to the wheel tread, and the gap between the working surface of the grinding block 110 and the wheel tread is reduced until the grinding block contacts the wheel tread; during the backward return movement of piston rod 132, grinding block 110 can be repositioned and the gap between its working surface and the wheel tread restored. The range of travel of piston rod 132 will, among other things, primarily determine the amount of clearance of the working surface of grinding block 110 relative to the wheel tread.

Considering that the size of the gap of the grinding block 110 changes during the use process due to, for example, the wear of the working surface (for example, as the wear of the working surface of the grinding block 110 increases, the size of the gap between the working surface and the wheel tread of the grinding block 110 is reset), the tread sweeper 10 is correspondingly provided with the gap adjusting device 150 to automatically and dynamically adjust the stroke range of the piston rod 132, so that the size of the gap between the working surface of the grinding block 110 and the wheel tread can be adjusted to be relatively consistent, and the grinding block 110 can be better or more accurately contacted with the wheel tread.

As shown in fig. 1 and 2, in a direction perpendicular to the central axis of the cylinder 130 (e.g., in the z direction), the cylinder block 121 is partially upwardly convex and open, thereby forming a gap-adjusting device mounting hole 139, and the gap-adjusting device mounting hole 139 may be substantially cylindrical, in particular, with its central axis substantially perpendicular to the xy plane, and of course, substantially perpendicular to the piston rod 132; the lash adjuster mounting hole 139 is used to positionally mount the lash adjuster 150. The gap adjusting means 150 mainly includes a movable latch 152, a latch base 153, and an elastic member 158 (e.g., a spring), the movable latch 152 being movably positioned on the latch base 153, the elastic member 158 being arranged in a substantially z-direction and applying a downward pressing force to the latch base 153.

Corresponding to the movable latch 152 of the gap adjusting device 150, as shown in fig. 1 to 6, the piston rod 132 is provided with a toothed member 151, and the toothed member 151 may be, for example, a rack, and has a plurality of teeth 1511 arranged in parallel in the substantially y-direction, and a tooth space 1512 is formed between the teeth 1511 arranged adjacently in front and behind; a latch head 1521 at the lower end of the movable latch 152 can be tooth-engaged with the toothed member 151, for example, the latch head 1521 can be engaged in the tooth grooves 1512 of the toothed member 151 under the downward pressure provided by the elastic member 158.

In an embodiment, the toothed member 151 is fixedly arranged on the piston rod 132 of the cylinder 130, such that the toothed member 151 can move completely synchronously with the piston rod 132 in the x-direction. Specifically, the toothed member 151 may be detachably fixed to the piston rod 132 by a toothed member fixing part 1519 (e.g., a bolt), or may be provided integrally with the piston rod 132, for example, it may be integrally formed with the piston rod 132. It will be appreciated that the fixed arrangement of the toothed member 151 relative to the piston rod 132 is not limiting, and that the toothed member 151 may in some cases be considered as part of the gap adjustment device 150 or a component specifically arranged relative to the gap adjustment device 150, and that in some cases the toothed member 151 may also be considered as part of the piston rod 132.

Specifically, a groove (not shown in the figure) facing the movable latch 152 is also provided on the piston rod 132, and a toothed member 151 (e.g., a rack) is fixed in the groove in the x direction. The groove may be formed by slotting on the circumferential surface of the piston rod 132, which is arranged in the front-rear direction of the piston rod 132. The length of the toothed member 151 may specifically be set in advance based on the stroke or the like of the piston rod 132.

In one embodiment, as shown in fig. 3 to 6, the pin base 153 is retained in the gap adjusting means mounting hole 139 of the cylinder block 131, so that the pin base 153 is substantially fixed in the xy plane when the movable pin 152 mounted thereon slides back and forth. The shape of the pin base 153 may be specifically designed according to the internal shape of the lash adjuster mounting hole 139, alternatively, the pin base 153 may be configured as a non-rotatable component with respect to the lash adjuster mounting hole 139, i.e., the pin base 153 may be rotatable within the lash adjuster mounting hole 139, such that the pin base 153 and the movable pin 152 mounted thereon are prevented from rotating in the xy-plane with respect to the toothed member 151 during operation; of course, latch socket 153 also cannot move in the x-direction or in the y-direction when restrained.

Specifically, pin seat 153 shown in fig. 5 is generally double U-shaped and has a limiting side 1534 substantially parallel to the xz plane, and two limiting sides 1534 form a substantially double U-shaped configuration with curved sides at both ends. When the pin seat 153 is seated in the gap adjustment device mounting hole 139, the limiting side 1534 and the planar inner side of the gap adjustment device mounting hole 139 that is correspondingly contacted therewith may prevent the pin seat 153 from rotating relative to the gap adjustment device mounting hole 139.

As further shown in fig. 3 to 5, the upper end of the movable pin 152 is fitted in the guide groove 1533 of the pin holder 153 provided in the x direction, and the movable pin 152 can move back and forth along the guide groove 1533 in the gap adjuster mounting hole 139 following the toothed member 151 with which it is engaged, so that the pin 152 becomes the movable pin. The guide groove 153 of the bolt seat 153 is specifically a T-shaped groove, and the upper end of the movable bolt 152 is correspondingly configured as a T-shaped joint which can be sleeved in the T-shaped groove and slide back and forth in the T-shaped groove, so that the sliding reliability is good, the guide is accurate, and the movable bolt is not easily damaged by impact.

As shown in fig. 3 to 5, the rod of the movable latch 152 may be relatively thick and may collide or abut against the inner sidewall of the gap adjusting device mounting hole 139 during the forward and backward movement, so that the moment borne by the movable latch 152 is greatly reduced, and the impact on the movable latch 152 during the operation is also greatly reduced. The front side surface 1525 of the rod part of the movable bolt 152 is designed to be matched with the shape of the inner side wall of the part of the gap adjusting device mounting hole 139, which is abutted or butted against the front side surface 1525 of the rod part of the movable bolt 152, so that good surface contact is formed between the front side surface 1525 of the rod part of the movable bolt 152 and the inner side wall of the part of the gap adjusting device mounting hole 139 when the front side surface and the inner side wall are abutted or butted against each other; similarly, the rear side 1526 of the rod portion of the movable latch 152 is designed to match the shape of the inner sidewall of the portion of the gap adjusting device mounting hole 139 that the movable latch 152 collides or abuts against, so that the rear side 1526 of the rod portion of the movable latch 152 and the inner sidewall of the portion of the gap adjusting device mounting hole 139 form a good surface contact when the movable latch and the gap adjusting device mounting hole collide or abut against each other. In this way, the impact between the movable plug 152 and the gap adjusting device mounting hole 139 is reduced, and the movable plug 152 has a longer service life and better reliability.

It should be noted that although the latch base 153 is retained in the lash adjuster mounting hole 139, the latch base 153 is able to move upward within the lash adjuster mounting hole 139, for example, under the upward force transmitted by the movable latch 152, when the downward force applied by the resilient member 158 is removed or overcome.

In one embodiment, during the forward movement of the piston rod 132, after the movable latch 152 is driven by the tooth-shaped member 151 to move forward to abut against the inner sidewall of one side of the gap-adjusting device mounting hole 139, the movable latch 152 slides between the tooth grooves 1512 of the tooth-shaped member 151 against the downward force applied by the elastic member 158 under the action force transmitted by the tooth surface of the tooth-shaped member 151; that is, during the forward movement, after abutting against the inner sidewall of one side of the lash adjuster mounting hole 139, the movable latch 152 is not locked with the toothed member 151, so that the piston rod 132 can continue to move forward, allowing the grinding block 110 to sufficiently act on the wheel tread surface even if the grinding block 110 is worn and becomes thinner. Thus, as the grinding block 110 continues to wear, the forward stroke of the piston rod 132 is lengthened.

At the end of the grinding process, which requires a reset to keep the working surface of the grinding block 110 clear of the wheel tread, the piston rod 132 will be driven backwards. In the process of moving the piston rod 132 backward, after the movable latch 152 is driven by the toothed member 151 to move backward to abut against the inner sidewall of the other side of the gap adjusting device mounting hole 139, the movable latch 152 is locked in a certain tooth groove 1512 of the locking toothed member 151 so as to prevent the piston rod 132 from moving further backward; that is, during the backward movement, after abutting against the inner side wall of the other side of the gap adjuster mounting hole 139, the movable latch 152 is locked with the toothed member 151, so that the piston rod 132 cannot be moved further backward, and the stroke of retracting the piston rod 132 is maintained at a substantially constant value even if the forward movement stroke of the piston rod 132 is lengthened due to wear of the grinding block 110 or the like. In this way, the reduction in the retraction stroke due to locking may substantially offset the reduced size of the grinding block 110, and the working surface of the grinding block 110 remains at a substantially fixed clearance range from the wheel tread after repositioning.

To achieve sliding relative to the movable latch 152 when the toothed member 151 moves forward but locking relative to the movable latch 152 when moving forward, the latch head 1521 and the teeth 1511 may be shaped to engage with each other. In one embodiment, as shown in fig. 6, an included angle β 1 of the left engaging surface 1523 of the latch head 1521 of the movable latch 152 with respect to the z direction is smaller than an included angle α 1 of the right tooth surface 1513 of the tooth 1511 of the tooth-shaped member 151 with respect to the z direction; the angle β 2 of the right engagement surface 1524 of the latch head 1521 of the movable latch 152 relative to the z-direction is greater than the angle α 2 of the left flank 1514 of the teeth 1511 of the toothed member 151 relative to the z-direction, illustratively, the angle β 1 is equal to, but not limited to, about 15 °, the angle α 1 is equal to, but not limited to, about 45 °, the angle β 2 is equal to, but not limited to, about 45 °, and the angle α 2 is equal to, but not limited to, about 25 °.

As shown in fig. 3 to 5, the tread surface sweeper 10 according to the embodiment of the present invention further includes a manual release member 154, a fixing bolt 155, and the like; the manual release part 154 is used to release the movable pins 152 from the tooth-shaped members 151 (e.g., the tooth grooves 1512) by an external force (e.g., the force of an operator) against the downward force applied by the elastic members 158, i.e., to decouple the movable pins 152 from each other at the tooth-shaped members 151. The manual release member 154 may specifically have an inner end disposed within the gap adjuster mounting hole 139 and an outer end extending outwardly from the sidewall of the gap adjuster mounting hole 139 in the y-direction, such as a handle, which may greatly facilitate manual operation; the fixing bolt 155 may mount an inner end of the manual release part 154 between the upper surface 1531 of the latch base 153 and the elastic member 158. Specifically, the inner end of the manual release part 154 may have a positioning and mounting hole, the fixing bolt 155 passes through the inner end of the manual release part 154 (e.g., the positioning and mounting hole of the inner end), the lower end of the fixing bolt 155 is screwed into the positioning and mounting hole 1532 of the latch seat 153, the lower end of the elastic member 158 may abut against the upper surface of the inner end of the manual release part 154, the upper end of the elastic member 158 abuts against the latch cover 159, and the downward pressure applied by the elastic member 158 may be transmitted to the latch seat 153 and then to the movable latch 152 through the manual release part 154, so that the manual release part 154 is convenient to mount, and the existence of the manual release part 154 does not affect the function of the lash adjuster 150 during normal operation.

When a manual release operation is required, an external force is manually applied from, for example, a handle at the outer end of the manual release part 154, so that the downward force applied by the elastic member 158 can be overcome and the latch holder 153 and the movable latch 152 can be moved upward together, thereby manually unlocking the movable latch 152 from the toothed member 151. The manual release part 154 makes good use of the lever principle, making the release operation convenient and easy, time-saving and labor-saving, and easy to operate.

Continuing with fig. 1, a latch cover 159 may be fixedly mounted to the upper end of the lash adjuster mounting hole 139 and cover the lash adjuster mounting hole 139.

When the tread sweeper 10 is in use, the piston rod 132 can extend and move forward together with the toothed member 151, the right tooth surface 1513 of the toothed member 151 acts on the pin head 1521 of the movable pin 152 to drive the movable pin 152 to move forward along the guide groove 1533 until the movable pin 152 collides with the inner wall of one side of the gap adjuster mounting hole 139 and is limited, the piston rod 132 continues to extend forward, the right tooth surface 1513 of the toothed member 151 continues to act on the pin head 1521 of the movable pin 152, the movable pin 152 moves upward along the gap adjuster mounting hole 139 toward the upper pin base 153 under the action of the upward component force, and the elastic member 158 is compressed; as the wear of the grinding block 110 increases, the piston rod 132 will continue to extend forward, and the movable latch 152 will slide over the right face 1513 of the first tooth 1511 of the toothed member 151 and then return to engage with another tooth socket 1512 on the toothed member 151 under the action of the elastic member 158; as the stroke of the forward movement of the piston rod 132 is further increased, the latch head 1521 of the movable latch 152 is successively engaged with the tooth grooves 1512 on the toothed member 151. When the piston rod 132 is reset, the piston rod 132 firstly drives the grinding block 110 to move backwards away from the wheel tread, at this time, the bolt head 1521 of the movable bolt 152 and the left tooth surface 1514 of the toothed member 151 form self-locking, the toothed member 151 drives the movable bolt 152 to slide backwards along the guide groove 1533 until the movable bolt 152 collides with the inner wall of the other side of the gap adjusting device mounting hole 139 and is limited, and as the movable bolt 152 and the toothed member 151 are locked in the backward movement direction, the piston rod 132 stops moving backwards, so that the retraction stroke distance of the piston rod 132 is controlled, the distance between the grinding block 110 and the wheel tread can be kept in a fixed range, and the purpose of flexibly adjusting the gap is achieved.

The clearance adjustment principle of tread sweeper 10 of the above embodiment is clearly different from the clearance adjustment principle of tread sweeper disclosed in, for example, the discussed patents in the background, for example, the toothed member 151 in tread sweeper 10 does not slide in the groove (e.g., rack slot) of piston rod 132 but the movable latch 152 can slide back and forth along the guide slot 1533 within the clearance adjustment device mounting hole 139. The applicant notices that in the prior tread sweeper, the clearance adjustment is carried out by adopting a mode that a rack slides in a piston rod, a bolt is fixed, and a bolt head is meshed with teeth of the rack to generate relative movement and lock. Although the gap adjusting mechanism of the existing tread sweeper can keep the distance between a grinding block and a wheel within a certain range, the gap adjustment is relatively inflexible, the phenomena of clamping stagnation and bending of a rack are easy to occur, and a bolt is long and fixed, so that the problems of breakage, bending or falling off and the like are easy to occur under the working condition of high moment.

In the tread sweeper 10 of the embodiment of the invention, on one hand, the toothed member 151 (such as a rack) is fixed on the piston rod 132 and does not need to move back and forth relative to the piston rod 132, so that the toothed member 151 basically has no problems of bending, clamping stagnation and the like even if the driving torque of a cylinder is large and the working condition environment is poor, the working reliability of the tread sweeper 10 is improved, and the maintenance work of the tread sweeper 10 is reduced; on the other hand, the movable bolt 152 can slide back and forth in the guide groove 1533 of the bolt seat 153, which can automatically realize the gap adjustment function and prevent the bolt from breaking, bending, falling off and the like (because the movable bolt 152 is abutted against the inner side wall of the gap adjustment device mounting hole 139 under the high-torque working condition, the torque borne by the movable bolt 152 is greatly reduced). Moreover, the gap adjustment device 150 of the tread sweeper 10 of the embodiment of the invention has the advantages of simple structure, easy disassembly, convenient maintenance and good operation reliability.

The tread sweeper 10 of the embodiment of the invention is also easy to integrate with the manual release part 154, the release operation is convenient and easy, and the gap adjusting function is not influenced.

It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements may be present.

The above examples mainly describe the tread sweeper according to the embodiments of the present invention. Although only some of the embodiments of the present invention have been described, those skilled in the art will appreciate that the present invention may be embodied in many other forms without departing from the spirit and scope thereof, for example, by eliminating the manual mitigation member 154 and the fixing bolt 155, and by having the lower end of the resilient member 158 directly abut the latch housing upper surface 1531 of the latch housing 153. Accordingly, the present examples and embodiments are to be considered as illustrative and not restrictive, and various modifications and substitutions may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.