Limiting bolt mechanism of tread cleaning device for revival high-speed motor train unit

Abstract

The invention relates to the technical field of railway vehicle equipment, in particular to a tread cleaning device limiting bolt mechanism for revival high-speed motor train units, which comprises a shell, a mounting seat is fixedly connected to the bottom of the shell, an end cover is fixedly connected to the right side of the shell, and an inner cylinder is slidably connected to the inside of the shell. The right end of the inner cylinder is fixedly connected with the side face of the end cover, and the left side of the inner cylinder is fixedly connected with a connecting plate. According to the limiting plug pin mechanism of the tread cleaning device for the reviving number high-speed motor train unit, after compressed air enters the end cover, a piston rod and an inner cylinder are pushed to move leftwards, a grinding unit makes contact with a wheel tread for cleaning, a rack on the inner cylinder moves leftwards along with the rack, the inclined face of the rack makes contact with the inclined face of a T-shaped strip, and the T-shaped strip is extruded to be lifted upwards (a compression spring is compressed); along with abrasion of the grinder, the moving distance of the piston is increased, the rack is gradually meshed with the T-shaped strip, abrasion is automatically compensated, and the cleaning effect is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of rail vehicle equipment technology, in particular to a tread cleaning device limiting pin mechanism for Fuxing Hao high-speed train set. BACKGROUND

[0002] In the field of rail vehicles, the tread cleaning device is a key auxiliary component of the high-speed train set braking system. Its core function is to remove impurities such as oil stains and rust on the tread through controllable contact between the grinding sub and the wheel tread, to ensure the stability of the adhesion coefficient between the wheel and the rail, and thus to ensure the braking distance to meet the standard. The limiting pin mechanism, as the "precision controller" of the tread cleaning device, its performance is crucial to the safety of train operation.

[0003] The traditional limiting pin mechanism used in the existing Fuxing Hao train set and other high-speed trains has exposed the following outstanding problems in long-term actual operation, which is difficult to adapt to the operation demand of high speed, high frequency and high reliability.

[0004] The inventor found the following problems in the existing technology in the process of implementing the existing limiting pin mechanism: The pin is in an up-down pull-out structure: it is laborious to pull out, and it will appear stuck after a long time of work.

[0005] The reset limiting is unreliable: after the compressed air is released, the mechanism lacks precise limiting when resetting, which is easy to cause the problem of too large (cleaning failure) or too small (collision damage) gap between the grinding sub and the wheel tread, affecting the safety of train operation.

[0006] In view of this, we propose a limiting pin mechanism for the tread cleaning device of Fuxing Hao high-speed train set. SUMMARY

[0007] The purpose of the present application is to provide a limiting pin mechanism for the tread cleaning device of Fuxing Hao high-speed train set to solve the problems of the pin being in an up-down pull-out structure and the reset limiting being unreliable as mentioned in the background. To achieve the above purpose, the present application provides the following technical scheme: a limiting pin mechanism for the tread cleaning device of Fuxing Hao high-speed train set, comprising a shell, a mounting seat fixedly connected to the bottom of the shell, an end cover fixedly connected to the right side of the shell, an inner cylinder slidingly connected to the inside of the shell, the right end of the inner cylinder being fixedly connected to the side of the end cover, a connecting plate fixedly connected to the left side of the inner cylinder, a fixing mechanism slidingly connected to the left side of the connecting plate, a connecting frame fixedly connected to the top of the shell, a rotating mechanism slidingly connected to the inside of the connecting frame for adjusting the inner cylinder, a protective cover fixedly connected to the left side of the shell, and the side of the protective cover being fixedly connected to the side of the connecting plate.

[0008] Preferably, one end of the piston rod is fixedly connected with the side of the end cover, a long slot is opened at the top of the inner cylinder, a rack is fixedly connected inside the long slot, one end of the piston rod is sleeved with a return spring, the piston rod connects the inner cylinder and the end cover, provides strong structural support and stability, ensures that the inner cylinder remains accurately aligned in a high-pressure or vibrating environment, prevents deviation or deformation.

[0009] Preferably, the rotating mechanism includes a T-shaped sleeve, the T-shaped sleeve is slidingly arranged at the top of the connecting frame, four fixed screws are rotationally connected to the top of the horizontal plate of the T-shaped sleeve, a T-shaped slot is opened at the bottom of the vertical plate of the T-shaped sleeve, a T-shaped strip is slidingly connected to the side of the inner wall of the T-shaped slot, the bottom of the vertical strip of the T-shaped strip is bevelled, the lower side of the vertical strip of the T-shaped strip is slidingly matched with the side of the rack, a compression spring is fixedly connected to the top of the horizontal strip of the T-shaped strip, the T-shaped strip is slidingly matched with the rack, and the bevelled vertical strip of the T-shaped strip realizes smooth transition when engaging and disengaging with the rack, reduces wear and noise, and the compression spring provides continuous pressure to ensure that the T-shaped strip and the rack remain in close contact, improves the reliability and efficiency of transmission, and is suitable for frequently adjusted occasions.

[0010] Preferably, the left side of the vertical strip of the T-shaped strip is fixedly connected with a square frame, a guide slot is opened in the inner part of the square frame, a deflection rod is rotationally connected to the rear side of the connecting frame, the front end of the deflection rod penetrates through the guide slot and is rotationally connected with the front side of the inner wall of the connecting frame, a protrusion is fixedly connected to the side of the deflection rod, the side of the protrusion is slidingly matched with the inner part of the guide slot, a handle is fixedly connected to the rear side of the deflection rod, a torsion spring is fixedly sleeved to the side of the deflection rod, one end of the torsion spring is fixedly connected with the side of the handle, and the other end of the torsion spring is fixedly connected with the side of the square frame. The protrusion slides in the guide slot to control the displacement of the T-shaped strip, realizes accurate position adjustment of the T-shaped strip, the handle facilitates rotation of the deflection rod, the torsion spring provides automatic reset force, the deflection rod quickly returns to the initial position after operation, reduces operation time and labor intensity, and improves the safety and convenience of the equipment.

[0011] Preferably, the fixing mechanism includes a mounting block fixedly connected with the right side of the connecting plate, a C-shaped frame is movably sleeved to the side of the mounting block, a through slot is opened in the side of each vertical plate of the C-shaped frame, two circular grooves are opened in the side of the mounting block, a bolt is movably inserted into the inner part of each through slot, one end of the bolt penetrates through the circular groove, two nuts are fixedly connected to the front side of the front vertical plate of the C-shaped frame, and an abrasive is fixedly connected to the side of the horizontal plate of the C-shaped frame. The abrasive provides efficient grinding or fixing function, enhances the universality and durability of the equipment.

[0012] Preferably, the bolt and nut are threadedly connected, and two through slots are provided on the upper and lower sides of the two through slots on the side of the vertical plate behind the C-shaped frame. An L-shaped strip is slidably connected inside the sliding slot. An L-shaped plate is fixedly connected to the side of the horizontal strip of the two L-shaped strips as a group. The bolt head contacts the side of the vertical plate of the L-shaped plate. The threaded connection of the bolt and nut ensures a firm fastening force and prevents loosening in a vibration environment. When the bolt and nut are tightened, the bolt head can squeeze the L-shaped plate, allowing the L-shaped plate to slide into the inside of the L-shaped slot, thus stably connecting the C-shaped frame and the mounting block.

[0013] Preferably, a tension spring is fixedly connected to the side of the vertical bar of the L-shaped strip. One end of the tension spring is fixedly connected to the side of the moving groove. The tension spring allows the L-shaped plate to be stretched after being pressed by the bolt head. When the bolt releases its contact with the L-shaped plate, the L-shaped plate can be reset by the rebound force of the tension spring.

[0014] Preferably, the connecting plate has a positioning hole on its left side, and the two vertical plates of the C-shaped frame are fixedly connected to the sides with positioning pins that cooperate with the positioning hole. The side of the connecting plate has two L-shaped grooves that cooperate with the L-shaped plate. When the L-shaped plate moves into the L-shaped groove, it is convenient to quickly fix the C-shaped frame and the mounting block. The cooperation of the positioning hole and the positioning pin enables the C-shaped frame and the connecting plate to be quickly and accurately aligned.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: In this invention, after compressed air enters the end cover, it pushes the piston rod and the inner cylinder to move to the left, so that the grinding pad contacts the wheel tread surface for cleaning. The rack on the inner cylinder moves to the left as well, and its inclined surface contacts the inclined surface of the T-shaped strip, squeezing the T-shaped strip upward (compressing the spring). As the grinding pad wears out, the piston moves a greater distance, and the rack and T-shaped strip gradually mesh, automatically compensating for wear and ensuring cleaning effect.

[0016] In this invention, the L-shaped plate is released by rotating two bolts counterclockwise. The spring force causes the L-shaped plate and L-shaped strip to return to their original position, and the L-shaped plate moves from the horizontal slot of the L-shaped groove into the vertical slot, thereby releasing the fixation between the C-shaped frame and the mounting block. The C-shaped frame and grinding tool can be directly removed for replacement without completely disassembling the bolts, which is convenient, quick, and avoids the loss of bolts.

[0017] In this invention, when the compressed air is depressurized, the return spring pushes the piston rod and inner cylinder to reset, disengaging the grinding wheel from the wheel. At this time, the vertical bar of the T-shaped bar engages with the rack, limiting and locking the inner cylinder, controlling the reset distance, and maintaining a certain gap between the grinding wheel and the wheel. For complete reset, rotating the handle moves the deflector rod and protrusion within the guide groove, causing the square frame and T-shaped bar to move upwards, disengaging from the rack, thus achieving rapid reset of the inner cylinder and piston rod. Attached Figure Description

[0018] Figure 1 is a perspective view of the shell of the present application; Figure 2 is a perspective view of the shell of the present application; Figure 3 is a perspective view of the shell of the present application; Figure 4 is a perspective view of the shell of the present application; Figure 5 is a perspective view of the shell of the present application; Figure 6 is a perspective view of the shell of the present application; Figure 7 is a perspective view of the shell of the present application; Figure 8 is a perspective view of the shell of the present application; Figure 9 is a perspective view of the shell of the present application; Figure 10 is a perspective view of the shell of the present application; Figure 11 is a perspective view of the shell of the present application; Figure 10 is an enlarged view of the structure at A in the above figure.

[0019] In the figure: 1, shell; 2, mounting seat; 3, end cover; 4, inner cylinder; 401, piston rod; 402, long slot; 403, rack; 5, connecting plate; 501, positioning hole; 6, fixing mechanism; 601, mounting block; 602, C-shaped frame; 603, through slot; 604, bolt; 605, nut; 606, circular slot; 607, moving slot; 608, L-shaped strip; 609, L-shaped plate; 6010, tension spring; 6011, abrasive; 6012, L-shaped slot; 7, connecting frame; 8, rotating mechanism; 801, T-shaped sleeve; 802, T-shaped slot; 803, T-shaped strip; 804, square frame; 805, guide slot; 806, deflection rod; 807, protrusion; 808, handle; 809, torsion spring; 8010, compression spring; 8011, fixing screw; 9, protective cover. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0021] Please refer toFigures 1 to 11 The application provides a technical solution: a tread cleaning device limiting bolt mechanism for a Fuxing high-speed train set, which comprises a shell 1, a mounting seat 2 fixedly connected to the bottom of the shell 1, an end cover 3 fixedly connected to the right side of the shell 1, an inner cylinder 4 slidingly connected to the inside of the shell 1, the right end of the inner cylinder 4 being fixedly connected to the side of the end cover 3, a connecting plate 5 fixedly connected to the left side of the inner cylinder 4, a fixing mechanism 6 slidingly connected to the left side of the connecting plate 5, a connecting frame 7 fixedly connected to the top of the shell 1, a rotating mechanism 8 slidingly connected to the inside of the connecting frame 7 and used for adjusting the inner cylinder 4, a protective cover 9 fixedly connected to the left side of the shell 1, and one side of the protective cover 9 being fixedly connected to the side of the connecting plate 5.

[0022] Embodiment one

[0023] Please refer to Figures 1 to 11 The embodiment provides a technical solution: The inner cylinder 4 is fixedly connected with a piston rod 401, one end of the piston rod 401 is fixedly connected to the side of the end cover 3, a long groove 402 is formed in the top of the inner cylinder 4, a rack 403 is fixedly connected to the inside of the long groove 402, and one end of the piston rod 401 is sleeved with a return spring; In the embodiment, the piston rod 401 connects the inner cylinder 4 and the end cover 3, provides strong structural support and stability, and ensures that the inner cylinder 4 remains accurately aligned in a high-pressure or vibration environment and prevents deviation or deformation; Embodiment two

[0024] Please refer to Figures 1 to 11 The embodiment provides a technical solution: The rotating mechanism 8 comprises a T-shaped sleeve 801 slidingly arranged at the top of the connecting frame 7, four fixed screws 8011 rotationally connected to the top of the horizontal plate of the T-shaped sleeve 801, a T-shaped groove 802 formed in the bottom of the vertical plate of the T-shaped sleeve 801, a T-shaped strip 803 slidingly connected to the side of the inner wall of the T-shaped groove 802, the bottom of the vertical strip of the T-shaped strip 803 being bevelled, the lower side of the vertical strip of the T-shaped strip 803 being slidingly matched with the side of the rack 403, and the top of the horizontal strip of the T-shaped strip 803 being fixedly connected with a compression spring 8010; The left side of the vertical strip of the T-shaped strip 803 is fixedly connected with a square frame 804, the inside of the square frame 804 is provided with a guide groove 805, a deflection rod 806 is rotationally connected to the rear side of the connecting frame 7, the front end of the deflection rod 806 penetrates through the guide groove 805 and is rotationally connected with the front side of the inner wall of the connecting frame 7, a protruding block 807 is fixedly connected to the side of the deflection rod 806, the side of the protruding block 807 is slidingly matched with the inside of the guide groove 805, a handle 808 is fixedly connected to the rear side of the deflection rod 806, the side of the deflection rod 806 is fixedly sleeved with a torsional spring 809, one end of the torsional spring 809 is fixedly connected with the side of the handle 808, and the other end of the torsional spring 809 is fixedly connected with the side of the square frame 804. In this embodiment, the T-shaped strip 803 is in sliding fit with the rack 403, and the bevel processing realizes smooth transition when engaging and disengaging with the rack 403, reduces wear and noise, the compression spring 8010 provides continuous pressure to ensure that the T-shaped strip 803 and the rack 403 are in close contact, improves the reliability and efficiency of the transmission, and is suitable for frequent adjustment occasions, the protrusion 807 slides in the guide groove 805 to control the displacement of the T-shaped strip 803, realizes accurate position adjustment of the T-shaped strip 803, the handle 808 facilitates rotating the deflection rod 806, and the torsional spring 809 provides automatic reset force, so that the deflection rod 806 quickly returns to the initial position after operation, reduces the operation time and labor intensity, and improves the safety and convenience of the equipment; Embodiment three:

[0025] Please refer to Figures 1 to 11 The embodiment provides a technical scheme: The fixing mechanism 6 comprises a mounting block 601, the mounting block 601 is fixedly connected with the right side of the connecting plate 5, a C-shaped frame 602 is movably sleeved on the side surface of the mounting block 601, two vertical plates of the C-shaped frame 602 are provided with through grooves 603 on the side surfaces, two circular grooves 606 are formed in the side surface of the mounting block 601, a bolt 604 is movably inserted into each of the two through grooves 603, one end of the bolt 604 penetrates through the circular groove 606, two nuts 605 are fixedly connected with the front side of the front vertical plate of the C-shaped frame 602, and a grinding piece 6011 is fixedly connected with the side surface of the horizontal plate of the C-shaped frame 602; The bolt 604 is in threaded connection with the nut 605, and a moving groove 607 is formed in the upper and lower sides of the two through grooves 603 on the side surface of the rear vertical plate of the C-shaped frame 602, an L-shaped strip 608 is slidably connected in the moving groove 607, an L-shaped plate 609 is fixedly connected with the horizontal bar of the two L-shaped strips 608, and the screw head of the bolt 604 is in contact with the side surface of the vertical plate of the L-shaped plate 609; A tension spring 6010 is fixedly connected with the vertical bar of the L-shaped strip 608, and one end of the tension spring 6010 is fixedly connected with the side surface of the moving groove 607; A positioning hole 501 is formed in the left side of the connecting plate 5, positioning pins matched with the positioning hole 501 are fixedly connected with the side surfaces of the two vertical plates of the C-shaped frame 602, and two L-shaped grooves 6012 matched with the L-shaped plate 609 are formed in the side surface of the connecting plate 5; In this embodiment, the grinding sub 6011 provides efficient grinding or fixing functions, enhances the versatility and durability of the device, the threaded connection of the bolt 604 and the nut 605 ensures firm fastening force, prevents loosening in a vibrating environment, when the bolt 604 is tightened with the nut 605, the screw head of the bolt 604 can extrude the L-shaped plate 609, so that the L-shaped plate 609 can be stably connected with the mounting block 601 after sliding into the L-shaped groove 6012, the L-shaped plate 609 can be stretched after being extruded by the screw head of the bolt 604, when the bolt 604 removes the resistance of the L-shaped plate 609, the L-shaped plate 609 can be reset by the elastic force of the tension spring 6010, when the L-shaped plate 609 moves to the inside of the L-shaped groove 6012, the C-shaped frame 602 and the mounting block 601 are fixed quickly and conveniently, and the cooperation of the positioning hole 501 and the positioning pin realizes the quick and accurate alignment of the C-shaped frame 602 and the connecting plate 5; The use method and advantages of the present application are as follows: As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figures 8 to 11 As shown in the figure, first, compressed air enters the inside of the end cover 3, the inner cylinder 4 and the grinding sub 6011 in the piston rod 401 are pushed to the left to extend, so that the side surface of the grinding sub 6011 contacts the wheel tread to clean the wheel tread, at the same time, the rack 403 at the top of the inner cylinder 4 moves to the left, and the inclined surface of the rack 403 contacts the inclined surface of the vertical bar of the T-shaped bar 803, so that the T-shaped bar 803 is automatically lifted upward and the compression spring 8010 is compressed, as the wear increases, the distance of the left movement of the piston rod 401 increases, and the vertical bar of the T-shaped bar 803 is engaged with the rack 403 in succession, so that the wheel tread is quickly cleaned and compensated; By counterclockwise rotating the two bolts 604, the screw head of the bolt 604 releases the locking state of the L-shaped plate 609, the L-shaped plate 609 and the L-shaped bar 608 are reset at the same time by the elastic force of the tension spring 6010, and the horizontal plate of the L-shaped plate 609 moves from the horizontal groove of the L-shaped groove 6012 to the inside of the vertical groove of the L-shaped groove 6012, at this time, the fixed state between the C-shaped frame 602 and the mounting block 601 can be released, the C-shaped frame 602 and the grinding sub 6011 can be directly taken out from the side of the mounting block 601 without directly disassembling the bolt 604, so that the grinding sub 6011 can be quickly replaced, and the possibility of losing the bolt 604 can be prevented; When the compressed air is released, the piston rod 401 and the inner cylinder 4 are reset under the action of the reset spring, and the abrasive 6011 is reset, at this time, the vertical bar of the T-shaped bar 803 moves to the inside of the rack 403, the inner cylinder 4 is self-locked, the reset distance of the inner cylinder 4 and the piston rod 401 is controlled, the abrasive 6011 can keep a certain distance with the wheel, and flexible adjustment is facilitated, meanwhile, when the inner cylinder 4 and the piston rod 401 need to be reset, the handle 808 drives the deflection rod 806 to deflect, and the lug 807 deflects in the guide groove 805, the guide groove 805 is driven by the moving force of the lug 807 to move the square frame 804 and the T-shaped bar 803 upward, the contact state of the vertical bar of the T-shaped bar 803 and the rack 403 is released, and the inner cylinder 4 and the piston rod 401 can be quickly reset.

[0026] The basic principle, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above examples, the above examples and descriptions in the specification are only preferred examples of the present application, and are not used to limit the present application, various changes and improvements of the present application can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A limiting pin mechanism for a tread cleaning device for a Fuxing high-speed train, comprising a housing (1), wherein a mounting base (2) is fixedly connected to the bottom of the housing (1), characterized in that: An end cap (3) is fixedly connected to the right side of the housing (1). An inner cylinder (4) is slidably connected inside the housing (1). The right end of the inner cylinder (4) is fixedly connected to the side of the end cap (3). A connecting plate (5) is fixedly connected to the left side of the inner cylinder (4). A fixing mechanism (6) is slidably connected to the left side of the connecting plate (5). A connecting frame (7) is fixedly connected to the top of the housing (1). A rotating mechanism (8) for adjusting the inner cylinder (4) is slidably connected inside the connecting frame (7). A protective cover (9) is fixedly connected to the left side of the housing (1). One side of the protective cover (9) is fixedly connected to the side of the connecting plate (5).

2. The limiting pin mechanism of the tread cleaning device for Fuxing high-speed train according to claim 1, characterized in that: A piston rod (401) is fixedly connected inside the inner cylinder (4). One end of the piston rod (401) is fixedly connected to the side of the end cover (3). A long groove (402) is opened on the top of the inner cylinder (4). A rack (403) is fixedly connected inside the long groove (402).

3. The limiting pin mechanism of the tread cleaning device for Fuxing high-speed train according to claim 1, characterized in that: The rotating mechanism (8) includes a T-shaped sleeve (801), which is slidably disposed on the top of the connecting frame (7). The top of the horizontal plate of the T-shaped sleeve (801) is rotatably connected with four fixing screws (8011). The bottom of the vertical plate of the T-shaped sleeve (801) is provided with a T-shaped groove (802). The side of the inner wall of the T-shaped groove (802) is slidably connected with a T-shaped strip (803). The bottom of the vertical strip of the T-shaped strip (803) is beveled, and the lower side of the vertical strip of the T-shaped strip (803) is slidably engaged with the side of the rack (403). The top of the horizontal strip of the T-shaped strip (803) is fixedly connected with a compression spring (8010).

4. The limiting pin mechanism of the tread cleaning device for Fuxing high-speed train according to claim 3, characterized in that: A square frame (804) is fixedly connected to the left side of the vertical bar of the T-shaped strip (803). A guide groove (805) is provided inside the square frame (804). A deflection rod (806) is rotatably connected to the rear side of the connecting frame (7). The front end of the deflection rod (806) passes through the guide groove (805) and is rotatably connected to the front side of the inner wall of the connecting frame (7). A protrusion (807) is fixedly connected to the side of the deflection rod (806). The side of the protrusion (807) slides in cooperation with the inside of the guide groove (805). A handle (808) is fixedly connected to the rear side of the deflection rod (806). A torsion spring (809) is fixedly sleeved on the side of the deflection rod (806). One end of the torsion spring (809) is fixedly connected to the side of the handle (808), and the other end of the torsion spring (809) is fixedly connected to the side of the square frame (804).

5. The limiting pin mechanism of the tread cleaning device for Fuxing high-speed train according to claim 1, characterized in that: The fixing mechanism (6) includes a mounting block (601), which is fixedly connected to the right side of the connecting plate (5). A C-shaped frame (602) is movably sleeved on the side of the mounting block (601). The two vertical plates of the C-shaped frame (602) are provided with through grooves (603) on their sides. The mounting block (601) has two circular grooves (606) on its side. The two through grooves (603) are a group of two. Bolts (604) are movably inserted into the inside of each through groove (603). One end of the bolt (604) passes through the circular groove (606). Two nuts (605) are fixedly connected to the front side of the front vertical plate of the C-shaped frame (602). A grinding tool (6011) is fixedly connected to the side of the horizontal plate of the C-shaped frame (602).

6. The limiting pin mechanism of the tread cleaning device for Fuxing high-speed train according to claim 5, characterized in that: The bolt (604) is threadedly connected to the nut (605). The upper and lower sides of the two through slots (603) on the side of the vertical plate behind the C-shaped frame (602) are provided with movable slots (607). The movable slots (607) are slidably connected to the inside of the movable slots (607). The two horizontal bars of the L-shaped bars (608) are fixedly connected to the side of the horizontal bars of the L-shaped bars (608). The bolt head (604) contacts the side of the vertical plate of the L-shaped plate (609).

7. The limiting pin mechanism of the tread cleaning device for Fuxing high-speed train according to claim 6, characterized in that: A tension spring (6010) is fixedly connected to the side of the vertical bar of the L-shaped bar (608), and one end of the tension spring (6010) is fixedly connected to the side of the moving groove (607).

8. The limiting pin mechanism of the tread cleaning device for Fuxing high-speed train according to claim 6, characterized in that: The left side of the connecting plate (5) is provided with a positioning hole (501), and the two vertical plates of the C-shaped frame (602) are fixedly connected with positioning pins that cooperate with the positioning hole (501). The side of the connecting plate (5) is provided with two L-shaped grooves (6012) that cooperate with the L-shaped plate (609).

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