Self-limiting mechanism on track

Abstract

The utility model provides a self-limiting mechanism on a track, which comprises a rotating plate, and the rotating plate has an initial position and can elastically rotate up and down along the initial position; the limiting part facing the steel plate polishing and brushing equipment is arranged on the rotating plate which elastically rotates up and down, and the limiting part is matched with or separated from the roller seat sliding into the steel plate polishing and brushing equipment, so that the roller seat can be freely switched between a sliding state and a fixed state in the steel plate polishing and brushing equipment; the roller seat can efficiently complete replacement of the brush roller in the steel plate polishing and brushing equipment, and the roller replacement efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of metal surface treatment, in particular to a self-limiting mechanism on a track. Background Art

[0002] After the production of steel plates is completed, they will be made into corresponding parts according to different usage requirements. However, before the steel plates are put into the production process, preparation time for processing the steel plates must always be reserved. During this period of time, the steel plates will react with moisture and chemicals in the air, causing the surface material of the steel plates to peel off or rust. In order to remove the rust layer, the existing method is to remove rust by grinding equipment that brushes the surface of the steel plates. This equipment physically grinds the surface of the steel plates by installing brush rollers, which improves the rust removal efficiency of the steel plates and causes less pollution. Therefore, it is recognized by people. However, when grinding, this equipment requires the brush roller to contact the surface of the steel plate. After long-term use, the grinding effect of the brush roller will decrease. Therefore, the old brush roller needs to be placed on the roller changing vehicle and replaced with a new roller.

[0003] A symmetrical track plate is pre-installed inside the existing steel plate grinding and brushing equipment to provide sliding support for the roller seat that slides into the steel plate grinding and brushing equipment. In order to keep the roller seat stable after entering the steel plate grinding and brushing equipment, screws are usually set on the track plate at the entrance of the steel plate grinding and brushing equipment to limit the sliding of the roller seat. When the roller seat slides from the entrance to the inside of the steel plate grinding and brushing equipment, the screws are manually inserted into the screw holes on the track plate to limit the roller seat from sliding out of the steel plate grinding and brushing equipment in the opposite direction. However, such a design has defects.

[0004] When the roller seat enters the steel plate grinding and brushing equipment, in order to receive the brush roller above, it needs to remain fixed on the track. When the roller seat receives the brush roller and needs to drive out of the steel plate grinding and brushing equipment, the roller seat needs to switch from a fixed state to a sliding state. However, the matching and disassembly of the screws and screw holes require a certain amount of operation time, and the state of the roller seat entering or driving out cannot be simply and efficiently controlled, affecting the efficiency of the roller changing vehicle. Summary of the invention

[0005] In order to solve the above-mentioned technical problems, the purpose of the utility model is to provide a self-limiting mechanism on a track, by setting a limiting part facing the steel plate grinding and brushing equipment on a rotating plate that rotates elastically up and down, and utilizing the limiting part to cooperate or separate with a roller seat that slides into the steel plate grinding and brushing equipment, so that the roller seat can freely switch between a sliding state and a fixed state in the steel plate grinding and brushing equipment, so that the roller seat can efficiently complete the replacement of the brush roller inside the steel plate grinding and brushing equipment, thereby improving the efficiency of roller replacement.

[0006] The technical solution of the utility model is achieved in this way:

[0007] A self-limiting mechanism on a track, which is installed between a track plate on a steel plate brushing device and a frame at an entrance of the steel plate brushing device, and can limit a roller seat that slides into the steel plate brushing device along the track plate from the entrance of the steel plate brushing device, the self-limiting mechanism comprises a rotating plate, the rotating plate has an initial position, and can be elastically rotated up and down along the initial position, and one end of the rotating plate facing the steel plate brushing device is configured as a limiting portion that can limit the roller seat from sliding out of the steel plate brushing device;

[0008] When the roller seat slides into the steel plate grinding and brushing equipment, the rotating plate can touch the roller seat and then elastically rotate upward along the initial position, so that the roller seat slides from under the rotating plate to the limiting part. At this time, the rotating plate elastically rotates downward and returns to the initial position, and the limiting part cooperates with the roller seat to limit the roller seat from sliding out of the steel plate grinding and brushing equipment in the opposite direction; when the roller seat slides out of the steel plate grinding and brushing equipment, the rotating plate can elastically rotate upward along the initial position again under the action of external force, so that the limiting part is separated from the roller seat, so as to release the limit on the roller seat, thereby allowing the roller seat to slide out of the steel plate grinding and brushing equipment in the opposite direction.

[0009] Preferably, the limiting part and the track plate are both connected with hook bolts, and a spring is connected between the two hook bolts to provide elastic rotation force for the rotating plate. When the rotating plate is in the initial position, the spring is in a stretched state. When the rotating plate elastically rotates upward along the initial position, the spring is further stretched. When the rotating plate elastically rotates downward and returns to the initial position, the spring contracts downward and returns to the initial stretched state. The spring can control the rotation and reset process of the rotating plate through its own elastic deformation, so that the limiting part and the roller seat can be matched or separated.

[0010] Preferably, a stopper connected to the frame is provided above the end of the rotating plate away from the limiting portion. When the rotating plate is in the initial position, the spring connected to the limiting portion is in a stretched state. At this time, the rotating plate abuts against the stopper above, limiting the end of the rotating plate away from the limiting portion from rotating upward; the stopper abuts against the end of the rotating plate away from the limiting portion, which can balance the tensile elastic force of the spring on the limiting portion in the initial position, so that the rotating plate remains stable in the initial position.

[0011] Preferably, the limiting portion of the rotating plate is provided with a plurality of shift holes arranged along its length direction, and the hook bolt can cooperate with the shift holes at different positions to adjust the elastic tension of the spring and the rotating plate; the shift hole is designed to adjust the tensile elastic force of the spring, thereby changing the degree of cooperation between the limiting portion and the roller seat, so that the cooperation effect between the limiting portion and the roller seat is optimized.

[0012] Preferably, a matching portion is provided on the roller seat, and a limiting plate is connected to the limiting portion. A limiting surface corresponding to the position of the matching portion is provided on the end of the limiting plate facing the steel plate grinding and brushing equipment. When the limiting surface fits with the outer contour of the matching portion, the roller seat can be restricted from sliding out of the steel plate grinding and brushing equipment; when the limiting surface is separated from the roller seat, the limiting plate releases the restriction on the roller seat, thereby allowing the roller seat to slide out of the steel plate grinding and brushing equipment in the opposite direction; through the fitting and separation of the limiting surface and the matching portion, the free switching process of the sliding state and the fixed state of the roller seat is simple and efficient.

[0013] Preferably, a guide slope extending obliquely downward is provided on the end of the limit plate facing away from the steel plate brushing equipment. When the roller seat slides into the steel plate brushing equipment, the guide slope can touch the mating part and drive the rotating plate to rotate elastically upward to guide the roller seat to slide into the steel plate brushing equipment; the guide slope can play a guiding role to avoid collision with the limit plate when the roller seat slides into the limit surface.

[0014] Preferably, the mating part is an annular part connected to the roller seat and capable of circumferential rotation. When the guide bevel touches the mating part, the annular part can roll on the guide bevel by its own circumferential rotation until the mating part fits the outer contour of the limiting surface. The circumferentially rotatable annular part makes the mating between the guide bevel and the mating part smoother.

[0015] Preferably, a handle is connected to one end of the rotating plate away from the limiting portion. When the roller seat slides out of the steel plate grinding and brushing equipment, the handle can be manually pulled downward to make the rotating plate elastically rotate upward again along the initial position, thereby separating the limiting portion from the roller seat to release the limit on the roller seat; the handle is convenient for hand grasping, and the process of separating the limiting portion from the roller seat by pulling the handle can be manually controlled.

[0016] Preferably, the self-limiting mechanism also includes an internal limiting assembly connected to the track plate, wherein the internal limiting assembly is located in the steel plate grinding and brushing equipment and includes a clamping plate and a limiting bolt connected to the clamping plate. When the limiting portion cooperates with the roller seat, the limiting bolt abuts against the roller seat to limit the roller seat from sliding into the steel plate grinding and brushing equipment. The internal limiting assembly can form a two-way limit on the roller seat with the limiting portion to keep the roller seat stable in the steel plate grinding and brushing equipment.

[0017] Preferably, the limit bolt is locked on the clamping plate by a locking nut in a threaded connection manner, and the locking nut can adjust the fitting length between the limit bolt and the clamping plate by its own rotation; the locking nut can fine-tune the distance between the limit bolt and the roller seat by its own rotation, thereby driving the roller seat to slide in the opposite direction to adjust the degree of fitting between the roller seat and the upper limit part of the rotating plate.

[0018] The principle of the utility model using the above technical solution is:

[0019] The utility model firstly provides a self-limiting mechanism on a track, by arranging a limiting part toward a steel plate grinding and brushing device on a rotating plate which rotates elastically up and down, and utilizing the limiting part to cooperate with or separate from a roller seat which slides into the steel plate grinding and brushing device.

[0020] The beneficial effects of the utility model using the above technical solution are:

[0021] When the roller seat enters the steel plate grinding and brushing equipment, it can cooperate with the automatic and limiting parts after touching the rotating plate to realize the reverse sliding limitation of the roller seat itself inside the steel plate grinding and brushing equipment. The whole limiting process is simple and efficient, so that the roller seat can quickly maintain a stable state in the steel plate grinding and brushing equipment, which is convenient for the next roller changing process of the roller seat to proceed smoothly.

[0022] Through the process of elastic upward rotation of the rotating plate, the limiting part and the roller seat can be quickly matched or separated, so that the roller seat can be quickly switched between a sliding state and a fixed state inside the steel plate grinding and brushing equipment. Compared with the design structure of matching screws and screw holes, the process of installing screws is omitted, so that the roller seat can efficiently complete the brush roller replacement inside the steel plate grinding and brushing equipment, thereby improving the efficiency of roller replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the structural schematic diagram of the roll changing vehicle;

[0024] Figure 2 It is a structural schematic diagram of the roll changing vehicle from another perspective;

[0025] Figure 3 This is an enlarged view of the track self-limiting mechanism when the roller-changing vehicle completes the limiting operation;

[0026] Figure 4 This is an enlarged view of the roller changing vehicle in contact with the track self-limiting mechanism;

[0027] Figure 5 It is an enlarged cross-sectional view of the first brush roller bracket and the second brush roller bracket respectively cooperating with the slide rod support;

[0028] Figure 6 is a structural schematic diagram of a first brush roller bracket;

[0029] Figure 7 It is a structural schematic diagram of the self-limiting track;

[0030] Figure 8 It is a structural diagram of the position of the plug post;

[0031] Fig. 9 It is the top view of the roller seat;

[0032] Fig.10 It is a cross-sectional view of the first brush roller bracket and the second brush roller bracket respectively matching with the horizontal sliding rod;

[0033] Fig.11 is a side view of the roller seat;

[0034] Fig.12a It is a schematic diagram of the hooking part and the nut cooperating before the brush roller is separated from the clamping roller mechanism;

[0035] Figure 12b It is a schematic diagram of the hook part and the nut cooperating to drive the brush roller to disengage from the clamping roller mechanism;

[0036] The reference numerals of the drawings are: 1-traveling mechanism, 2-roller seat, 3-self-limiting track, 4-steel plate grinding and brushing equipment, 11-high support frame, 12-low support frame, 13-rotating wheel, 14-handle, 15-lap plate, 16-insertion column, 111-traction handle, 21-base, 22-horizontal slide bar, 23-second brush roller bracket, 24-handle, 25-cylinder, 26-support track, 27-first brush roller bracket, 28-nut, 2 9-roller, 211-slide support, 212-copper sleeve, 213-limiting end cover, 214-buffer pad, 215-sealing ring, 216-expansion sleeve, 217-double locking assembly, 217a-retaining ring, 217b-locking end cover, 218-lightening hole, 219-strip body, 231-threaded connection hole, 232-pad, 233-mounting hole, 241-side bracket, 242-movable avoidance area, 243-matching part, 244-extension part, 251-telescopic rod, 252-adapter, 253-adjusting nut, 271-locking hole, 271a-screw hole, 272-disassembly hole, 273-through hole, 274-insertion hole, 275-connection threaded hole, 276-L-shaped block, 276a-first guide slope, 277-first clamping part, 278-second clamping part, 279-elastic buffer column, 31-track plate, 32-self-limiting component, 3 3-internal limit assembly, 34-external connecting seat, 35-internal connecting seat, 321-dial lever, 322-abutment block, 323-hook bolt, 324-spring, 325-rotating shaft, 326-rotating plate, 327-gear hole, 328-block, 329-limiting surface, 331-card plate, 332-limiting bolt, 333-locking nut, a-rail, bL-type gap, c-jack, d-manual valve, s-guide ramp. Implementation

[0037] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0038] In the description of the present invention, the term "at least one" refers to one or more than one, unless otherwise clearly defined. The terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0039] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0040] The utility model provides specific implementation methods as follows:

[0041] like Figure 1-12b As shown, this embodiment provides a self-limiting mechanism on a track, which is installed between the track plate 31 on the steel plate brush equipment 4 and the frame at the entrance of the steel plate brush equipment 4, and can limit the roller seat 2 that slides into the steel plate brush equipment 4 along the track plate 31 from the entrance of the steel plate brush equipment 4; specifically, the track plate 31 is symmetrically arranged on the frame of the steel plate brush equipment 4 along the front and rear directions, and is used to form a sliding support for the roller seat 2, and the roller seat 2 is set on the roller changing vehicle, and is used to receive the brush roller. The roller seat 2 can slide from the roller changing vehicle to the track plate 31 to receive and replace the brush roller.

[0042] Further, if Figure 3-7 As shown, after the self-limiting mechanism and the track plate 31 are installed, the two front-to-back symmetrical track plates 31 and the self-limiting mechanism installed on the track plate 31 can be regarded as having a self-limiting track 3 for controlling the roller seat 2 in the steel plate grinding and brushing equipment 4, and the self-limiting mechanism includes a self-limiting component 32, and the self-limiting component 32 includes a rotating plate 326, and the rotating plate 326 has an initial position. The rotating plate 326 is in a horizontal state at the initial position, and a rotating shaft 325 connected to the frame is provided in the middle of the rotating plate 326. The rotating shaft 325 is used as a rotating fulcrum, and the rotating plate 326 can be elastically rotated up and down along the initial position, and the end of the rotating plate 326 facing the steel plate grinding and brushing equipment 4 is configured to limit the roller seat 2 from sliding out of the limiting portion of the steel plate grinding and brushing equipment 4.

[0043] Furthermore, the working process of the self-limiting mechanism is as follows: when the roller seat 2 slides into the steel plate grinding and brushing equipment 4, the rotating plate 326 can touch the roller seat 2 and then elastically rotate upward along the initial position, so that the roller seat 2 slides from under the rotating plate 326 to the limiting part. At this time, the rotating plate 326 elastically rotates downward and resets to the initial position, and the limiting part cooperates with the roller seat 2 to limit the roller seat 2 from sliding out of the steel plate grinding and brushing equipment 4 in the opposite direction; when the roller seat 2 slides out of the steel plate grinding and brushing equipment 4, the rotating plate 326 can elastically rotate upward along the initial position again under the action of external force, so that the limiting part is separated from the roller seat 2, so as to release the limit on the roller seat 2, thereby allowing the roller seat 2 to slide out of the steel plate grinding and brushing equipment 4 in the opposite direction.

[0044] Furthermore, a hook bolt 323 is connected to the limit portion and the track plate 31. In order to allow the rotating plate 326 to elastically rotate or reset along the initial position, a spring 324 is connected between the two hook bolts 323 to provide an elastic rotating force for the rotating plate 326. When the rotating plate 326 is in the initial position, the spring 324 is in a stretched state. The spring 324 in the stretched state can provide an elastic pre-tightening force for the rotating plate 326. When the rotating plate 326 elastically rotates upward along the initial position, the spring 324 is further stretched. When the rotating plate 326 elastically rotates downward and resets to the initial position, the spring 324 contracts downward and returns to the initial stretched state. At this time, the spring 324 is in a stretched state and will not fall off the hook bolt 323. The spring 324 can control the rotation and reset process of the rotating plate 326 through its own elastic deformation, so that the limit portion and the roller seat 2 can cooperate or separate. The structure is simple and the design is ingenious.

[0045] Furthermore, when the rotating plate 326 is in the initial position, the spring 324 connected to the limiting portion is in a stretched state. The stretched spring 324 will generate an upward rotational force on the end of the rotating plate 326 away from the limiting portion. In order to allow the rotating plate 326 to be stably maintained in the initial position, a stopper 322 connected to the frame is provided above the end of the rotating plate 326 away from the limiting portion. At this time, the rotating plate 326 abuts against the stopper 322 above, limiting the upward rotation of the end of the rotating plate 326 away from the limiting portion; that is, the stopper 322 abuts against the end of the rotating plate 326 away from the limiting portion, which can balance the tensile elastic force of the spring 322 on the limiting portion in the initial position, so that the rotating plate 326 remains stable in the initial position.

[0046] Furthermore, when the roller seat 2 cooperates with the limiting part, the spring 324 in a stretched state applies a downward elastic pulling force to the rotating plate 326, so that the limiting part and the roller seat 2 can fully cooperate. In order to adjust the elastic pulling force to a reasonable range, a plurality of gear holes 327 arranged along the length direction of the rotating plate 326 are provided on the limiting part of the rotating plate 326. The hook bolt 323 can cooperate with the gear holes 327 at different positions to adjust the elastic pulling force of the spring 324 and the rotating plate 326; the gear hole 327 is designed to adjust the tensile elastic force of the spring 324, thereby changing the degree of cooperation between the limiting part and the roller seat 2, so that the cooperation effect between the limiting part and the roller seat 2 is optimized.

[0047] Furthermore, a mating portion 243 is provided on the roller seat 2, and a limiting plate 328 is connected to the limiting portion. A limiting surface 329 corresponding to the position of the mating portion 243 is provided on the end of the limiting plate 328 facing the steel plate brushing equipment 4. When the mating portion 243 on the roller seat 2 slides to the position of the limiting surface 279, the limiting surface 329 fits with the outer contour of the mating portion 243. At this time, the limiting surface 329 forms a limit on the mating portion 342, limiting the roller seat 2 from sliding out of the steel plate brushing equipment 4; when the limiting surface 329 is separated from the roller seat 2, the limiting plate 328 releases the limit on the roller seat 2, thereby allowing the roller seat 2 to slide out of the steel plate brushing equipment 4 in the opposite direction; through the fitting and separation of the limiting surface 329 and the mating portion 243, the free switching process of the sliding state and the fixed state of the roller seat 2 is simple and efficient.

[0048] Furthermore, in order to prevent the roller seat 2 from colliding with the limit plate 328 when sliding to the limit surface 329, a guide slope s extending obliquely downward is provided on the end of the limit plate 328 facing away from the steel plate brushing equipment 4. When the roller seat 2 slides into the steel plate brushing equipment 4, the guide slope s can touch the matching part 243 and drive the rotating plate 326 to rotate upward elastically to guide the roller seat 2 to slide into the steel plate brushing equipment 4; the guide slope s can play a guiding role, so that the roller seat 2 can avoid colliding with the limit plate 328 when sliding into the limit surface 329.

[0049] Furthermore, in order to make the contact between the matching part 243 and the guide bevel s smoother, the matching part 243 is an annular part connected to the roller seat 2 and can rotate circumferentially. When the guide bevel s touches the matching part 243, the annular part can roll on the guide bevel s through its own circumferential rotation until the matching part 243 fits the outer contour of the limiting surface 329; the circumferentially rotatable annular part makes the matching between the guide bevel s and the matching part 243 smoother, and converts the sliding friction generated by the contact between the matching part 243 and the guide bevel s into rolling friction, thereby reducing the wear between the two.

[0050] Furthermore, when the roller seat 2 needs to slide out of the steel plate grinding and brushing equipment 4 in the opposite direction, external force intervention and control are required. Therefore, a lever 321 is connected to the end of the rotating plate 326 away from the limiting part. When the roller seat 2 slides out of the steel plate grinding and brushing equipment 4, the lever 321 can be manually pulled downward to make the rotating plate 326 elastically rotate upward again along the initial position, thereby separating the limiting part from the roller seat 2 to release the limit on the roller seat 2; the lever 321 is easy to grasp by hand, and the process of separating the limiting part from the roller seat 2 by pulling the lever 321 can be manually controlled.

[0051] Furthermore, when the roller seat 2 that enters the steel plate brushing equipment 4 slides to the specified position, in order to keep the roller seat 2 stable, it is also necessary to limit the roller seat 2 internally. Therefore, the self-limiting mechanism also includes an internal limiting component 33 connected to the track plate 31. The internal limiting component 33 is located in the steel plate brushing equipment 4, and includes a clamping plate 331 and a limiting bolt 332 connected to the clamping plate 331. When the limiting portion cooperates with the roller seat 2, the limiting bolt 332 abuts against the roller seat 2 to limit the roller seat 2 from sliding into the steel plate brushing equipment 4. The internal limiting component 33 can form internal and external bidirectional limitations on the roller seat 2 with the limiting portion, so that the roller seat 2 remains stable in the steel plate brushing equipment 4 to carry out the next roller changing process.

[0052] The locking nut 333 can adjust the fitting length between the limit bolt 332 and the card plate 331 by its own rotation, thereby changing the distance between the limit bolt 332 and the roller seat 2; the locking nut 333 can fine-tune the distance between the limit bolt 332 and the roller seat 2 by its own rotation, thereby driving the roller seat 2 to slide in the opposite direction, so as to adjust the fitting degree between the roller seat 2 and the upper limit part of the rotating plate; that is, when there is a gap between the limit surface 329 on the limit part and the matching part 243, the matching length of the limit bolt 332 and the locking nut 333 can be adjusted, and the roller seat 2 can be reversely pressed, so that the matching part 243 can be more closely contacted with the limit surface 329.

[0053] Furthermore, the roller changing vehicle is usually used to replace the brush rollers inside the steel plate brush grinding equipment 4, which includes a roller seat 2 that can move left and right and a traveling mechanism 1 that can move forward and backward, the roller seat 2 is arranged above the traveling mechanism 1, and can move in the front and rear directions driven by the traveling mechanism 1; the roller seat 2 includes a base 21, the base 21 is a support member of the roller seat 2, the base 21 is a box-type structure with an unclosed top and manufactured through welding, and in order to reduce the weight of the base 21, a through lightening hole 218 is provided on the sealing plate at the bottom of the base 21, so that the structure of the base 21 is lighter.

[0054] Further, if Figure 1-2 As shown, in order to facilitate manual control of the roller seat 2 that moves left and right, a handle 24 is connected to the left end or right end of the base 21, and a roller connecting mechanism is connected to the upper end of the base 21. The handle 24 can drive the base 21 and the roller connecting mechanism to move synchronously along the left and right directions under manual pushing and pulling; specifically, the roller connecting mechanism includes a roller connecting assembly and a driving mechanism, the driving mechanism is connected to the roller connecting assembly, and can drive the roller connecting assembly to slide along the left and right directions by its own telescopic method.

[0055] Furthermore, the roller connecting assembly includes a brush roller bracket assembly and a slide bar assembly that can slide left and right. The brush roller bracket assembly is a receiving part of the brush roller and can move left and right with the slide bar assembly. The slide bar assembly includes a horizontal slide bar 22 that is symmetrically arranged at the upper end of the base 21. The upper end of the base 21 is provided with a slide support assembly that is symmetrical front and back. The slide support assembly includes two slide bar supports 211 that are arranged along the left and right directions; the horizontal slide bar 22 is inserted into the two slide bar supports 211 and can slide along the left and right directions; the slide bar assembly is equivalent to the support guide rail for the left and right movement of the brush roller bracket assembly on the roller seat 2. Compared with the ordinary roller changing vehicle that sets the guide rail at the bottom position of the base, the slide bar assembly in this embodiment is arranged at the bottom position of the base. The rod assembly is arranged at the upper end of the base 21. This is because when the brush roller falls, there may be a front-to-rear position deviation due to the roller error, causing the brush roller to generate an impact force on the brush roller bracket assembly when falling. The impact force can be divided into horizontal and vertical impact forces. If the position of the slide bar assembly is close to the bottom of the base 21, the horizontal impact force will produce a torsional effect on the bottom guide rail, which may easily cause deformation at the joint between the brush roller bracket assembly and the slide bar assembly. Setting the slide bar assembly at the upper end of the base 21 is equivalent to reducing the force arm of the horizontal impact force, thereby protecting the structural strength of the brush roller bracket assembly and the slide bar assembly and improving their service life.

[0056] Furthermore, a brush roller bracket assembly is sleeved on the slide bar assembly, and the brush roller bracket assembly includes a first brush roller bracket 27 and a second brush roller bracket 23 that are aligned left and right; these two brackets are semi-circular ring structures protruding downward, and the first brush roller bracket 27 and the second brush roller bracket 23 remain fixed on the slide bar assembly and can move synchronously in the left and right directions under the action of external force to achieve rapid replacement of the brush roller; in order to make the brush roller bracket assembly have a larger sliding stroke in the left and right directions, the first brush roller bracket 27 and the second brush roller bracket 23 are staggered in sequence with the two slide bar supports 211 in the left and right directions; this is because compared with the brush roller bracket assembly located between the sliding support assemblies, the first brush roller bracket 27 and the second brush roller bracket 23 that are staggered with the sliding support assemblies can not only avoid the brush roller bracket assembly from colliding with the slide bar support 211 when sliding, but also widen the sliding space of the brush roller bracket assembly in the left and right directions, making brush roller replacement more flexible and efficient.

[0057] Further, if Figure 5 As shown, the slide bar support 211 is provided with a bearing hole that penetrates in the left-right direction, and the horizontal slide bar 22 is inserted in the bearing hole. In order to prevent the horizontal slide bar 22 from excessive wear when sliding on the slide bar support 211, a copper sleeve 212 is provided in the bearing hole, and the two ends of the slide bar support 211 are connected with a limit end cover 213 that limits the axial movement of the copper sleeve 212. The soft copper sleeve 212 can separate the slide bar support 211 and the horizontal slide bar 22 that are in contact with each other to avoid contact wear between the two. The service life of the slide bar support 211 and the horizontal slide bar 22 is improved.

[0058] Further, if Figure 5 , Fig.10 As shown, if the axial length of the roller seat 2 is too long, when the brush roller slides axially on the roller seat 2, it is very likely to cause the brush roller to roll over in the left-right direction on the roller seat 2. Therefore, a side bracket 241 is symmetrically connected to the left and right ends of the base 21. The side bracket 241 is a support carrier for the handle 24; the side bracket 241 extends upward from the end of the base 21, and an extension portion 244 is formed on the side bracket 241. The top of the extension portion 244 is at the same height as the top of the slide bar support 211; the slide bar support 211, the side bracket 241 and its own extension portion 244 form a rectangular The horizontal slide bar 22 can slide left and right in the movable avoidance area 242. The driving mechanism spans the movable avoidance area 242 and is overlapped and fixed on the extension part 244 and the top of the slide bar support 211 close to the second brush roller bracket 23, and is connected to the upper end of the second brush roller bracket 23 to drive the brush roller bracket assembly and the horizontal slide bar 22 to move synchronously along the left and right directions. This bridge-structured driving mechanism can not only drive the second brush roller bracket 23 to drive the connecting roller assembly to slide along the left and right directions, but also save the axial space of the roller seat 2, so that the connecting roller assembly has good stability when sliding along the left and right directions on the roller seat 2.

[0059] Furthermore, in order to ensure the sliding speed of the roller assembly in the left and right directions, the driving mechanism is usually a cylinder 25 arranged symmetrically in front and back, and the cylinder 25 includes a telescopic rod 251 that can be telescopically extended left and right. In addition, since the telescopic rod 251 and the second brush roller bracket 23 cannot rotate circumferentially on the roller seat 2, it is difficult to directly connect the telescopic rod 251 with the second brush roller bracket 23 through a thread. Therefore, an adapter 252 is provided between the telescopic rod 251 and the second brush roller bracket 23. The head of the telescopic rod 251 is a threaded structure, and a connecting ear extends from the upper end of the second brush roller bracket 23. A threaded connection hole 231 should be provided, and the adapter 252 is connected to the head of the telescopic rod 251 and the threaded connection hole 231 on the second brush roller bracket 23 respectively by a threaded connection method; the telescopic rod 251 and the second brush roller bracket 23 are connected together, and the adapter 252 makes up for the distance between the telescopic rod of the cylinder 25 and the second brush roller bracket 23, so that the cylinder 25 can be connected to the second brush roller bracket 23. The threaded connection method also makes it easy for the adapter 252 to adjust the distance between the adapter 252 and the second brush roller bracket 23 or the telescopic rod 251 through its own circumferential rotation.

[0060] Furthermore, the adapter 252 and the telescopic rod 251 are connected and adjusted by means of an adjusting nut 253. The adjusting nut 253 can not only lock the adapter 252 and the telescopic rod 251, but also change the matching length between the adjusting nut 253 and the telescopic rod 251 by rotating the adjusting nut 253, and adjust the matching length between the adapter 252, the telescopic rod 251 and the threaded connection hole 231, so as to achieve the best connection effect between the second brush roller bracket 23 and the telescopic rod 251.

[0061] Further, if Figure 6 , Fig.11 As shown, the inner walls of the first brush roller bracket 27 and the second brush roller bracket 23 are symmetrically provided with buffer structures for reducing the impact of the brush rollers. The buffer structure includes symmetrically arranged and non-through insertion holes 274 on the inner walls of the first brush roller bracket 27 or the second brush roller bracket 23. The insertion holes 274 are provided with elastic buffer columns 279 protruding from the inner walls. In order to prevent the elastic buffer columns 279 from escaping from the insertion holes 274, the elastic buffer columns 279 and the insertion holes 274 are interference fit. When the brush roller falls onto the first brush roller bracket 27 and the second brush roller bracket 23, the part of the elastic buffer columns 279 protruding from the inner walls contacts the brush roller and generates elastic deformation, thereby buffering the impact force generated by the brush roller on the brush roller bracket assembly.

[0062] Furthermore, the elastic buffer column 279 may be over-deformed after multiple uses, and the elastic buffer column 279 needs to be replaced. In order to facilitate the removal of the elastic buffer column 279, a disassembly hole 272 concentric with the insertion hole 274 is provided at the insertion hole 274. The diameter of the disassembly hole 272 is smaller than the insertion hole 274, so that the elastic buffer column 279 will not fall out of the disassembly hole 272; and the disassembly hole 272 is connected with the outer wall of the first brush roller bracket 27 or the second brush roller bracket 23. When the elastic buffer column 279 needs to be replaced, a screwdriver or other columnar member can be inserted into the disassembly hole 272 to push the elastic buffer column 279 out of the insertion hole 274, and then a new elastic buffer column 279 can be disassembled into the insertion hole 274. The replacement of the elastic buffer column 279 is completed.

[0063] Furthermore, since the brush roller bracket assembly has to withstand multiple impacts of the brush roller when used multiple times, the brush roller bracket assembly may have structural problems such as deformation or cracking. Therefore, considering the replacement and maintenance of the brush roller bracket assembly, the first brush roller bracket 27 and the second brush roller bracket 23 are not welded to the horizontal slide bar 22, but are locked and fixed to the horizontal slide bar 22; specifically, the head and tail ends of the semicircular first brush roller bracket 27 and the second brush roller bracket 23 extend outward on the horizontal plane to form two front-to-back symmetrical mounting parts, and a through hole 273 is provided on the mounting part, and the axis of the through hole 273 extends in the left-right direction, and the horizontal slide bar 22 is simultaneously inserted in the first brush roller bracket 27 and the second brush roller bracket 23 in the left-right direction. The roller bracket 27 and the second brush roller bracket 23 are in the through hole 273 on the same side, and the outer diameter of the horizontal slide bar 22 matches the diameter of the through hole 273, so that the horizontal slide bar 22 limits the radial jumping of the first brush roller bracket 27 and the second brush roller bracket 23 in the horizontal slide bar 22 while passing through the first brush roller bracket 27 and the second brush roller bracket 23; at this time, the brush roller bracket assembly can slide in the left and right directions on the horizontal slide bar 22 to adjust the distance between the first brush roller bracket 27 and the second brush roller bracket 23 until the distance between the two matches the length of the brush roller to be replaced, and the first brush roller bracket 27 and the second brush roller bracket 23 can be locked and fixed in the axial direction.

[0064] Further, if Figure 5-6 As shown, the upper ends of the first brush roller bracket 27 and the second brush roller bracket 23 are symmetrically provided with threaded connection holes 275 along the front-to-back direction, and the threaded connection holes 275 are connected to the corresponding positions of the L-shaped clamping blocks 276. The L-shaped clamping blocks 276 are limiters of the brush rollers. Considering that they will be impacted by the brush rollers during multiple roller changes and are prone to deformation, the L-shaped clamping blocks 276 are also detachably connected to the brush roller bracket assembly. Specifically, the L-shaped clamping blocks 276 include two mutually perpendicular legs extending on a horizontal plane, and the upper ends of the legs have a first guide formed by chamfering. Inclined surface 276a, when the brush roller falls, the first guiding inclined surface 276a can contact the axial end of the brush roller to form a guiding effect, so that the axial end of the brush roller is stuck in the encirclement of the L-shaped block 276; the two legs extend out in the front-to-back and left-to-right directions respectively, and the multiple legs on the first brush roller bracket 27 and the second brush roller bracket 23 form limiting points in four directions of the front-to-back and left-to-right directions on the brush roller support assembly, thereby forming limitations in the front-to-back and left-to-right directions for the brush roller that falls on the brush roller bracket assembly, preventing the brush roller from moving on the brush roller bracket assembly, and ensuring the stability of the brush roller.

[0065] Furthermore, considering the replacement and maintenance of the brush roller bracket assembly, the first brush roller bracket 27 and the second brush roller bracket 23 are not welded to the horizontal slide bar 22, but are locked on the horizontal slide bar 22 by different locking methods and structures, so that the brush roller bracket assembly can be connected to the horizontal slide bar 22 as a whole and can move synchronously in the left and right directions under the action of external force; specifically, the first brush roller bracket 27 is provided with an L-shaped gap b that runs through in the left and right directions; the L-shaped gap b is connected to the through hole 273; the L-shaped gap b divides the first brush roller bracket 27 into a first clamping portion that can move closer or farther away from each other up and down The first clamping part 277 and the second clamping part 278, the first clamping part 277 is provided with a locking hole 271 which passes through from top to bottom, and the second clamping part 278 is correspondingly provided with a screw hole 271a, the screw passes through the locking hole 271 and is screwed into the screw hole 271a, so that the first clamping part 277 and the second clamping part 278 are close to each other to clamp the horizontal sliding bar 22, so that the first brush roller bracket 27 is kept locked and fixed on the horizontal sliding bar 22; by adjusting the locking degree of the screw, the clamping force between the first clamping part 277 and the second clamping part 278 can be adjusted to control the locking degree between the first brush roller bracket 27 and the horizontal sliding bar 22.

[0066] Furthermore, since the connecting ear at the upper end of the second brush roller bracket 23 is connected to the telescopic rod 251 of the driving mechanism, the connecting ear occupies the top space of the second brush roller bracket 23, and the second brush roller bracket 23 is no longer fixed by a clamping structure. Specifically, the second brush roller bracket 23 includes an insertion portion that cooperates with the horizontal slide bar 22, and the insertion portion is partially hollowed out to form a mounting hole 233 surrounding the horizontal slide bar 22, and the non-hollowed-out portion forms a sleeve portion tightly surrounding the horizontal slide bar 22; the mounting A tightening sleeve 216 is provided in the hole 233, and the tightening sleeve 216 abuts against the limiting end cover 213 at the opening of the mounting hole 233, so that it remains axially fixed in the mounting hole 233; the tightening sleeve 216 keeps the second brush roller bracket 23 circumferentially locked and fixed on the horizontal slide bar 22; the tightening sleeve 216 contacts the horizontal slide bar 22 and the second brush roller bracket 23 at the same time, which can ensure that the second brush roller bracket 23 is in a locked state on the horizontal slide bar 22, so that the second brush roller bracket 23 is connected to the horizontal slide bar 22 as a whole.

[0067] Furthermore, since the expansion sleeve 216 is in contact with the horizontal slide bar 22 and the second brush roller bracket 23 at the same time, it can ensure the circumferential fixation of the second brush roller bracket 23 on the horizontal slide bar 22 while providing a partial axial locking force. However, after repeated use, the outer wall surface of the expansion sleeve 216 is in an expanded state with the outer wall surfaces of the second brush roller bracket 23 and the horizontal slide bar 22, which is inevitably subject to wear or slight extrusion deformation, thereby affecting the service life of the expansion sleeve 216 and the locking effect of the second brush roller bracket 23. Therefore, a double locking assembly 217 is provided on the outer end surface of the sleeve joint, which is in close contact with the sleeve joint. The double locking assembly 217 includes a retaining ring 217a and a locking end cover 217b. The retaining ring 217 a is axially fixed with the horizontal slide bar 22; the locking end cover 217b is connected to the corresponding end face of the sleeve joint, and the retaining ring 217a is pressed; the double locking component 217 forms an axial locking and fixing on the second brush roller bracket 23 on the horizontal slide bar 22; the double locking component 217 can cooperate with the expansion sleeve 216 to form a double locking in the axial and circumferential directions for the second brush roller bracket 23; and the double locking component 217 can share the remaining axial locking force required by the second brush roller bracket 23 while the expansion sleeve 216 provides part of the axial locking force, so as to avoid the deformation of the expansion sleeve 216 due to excessive expansion force, thereby making the locking effect of the second brush roller bracket 23 more stable.

[0068] Furthermore, the left and right end surfaces of the sliding rod support 211 are connected to buffer pads 214 fixed on the limiting end cover 213, and the buffer pads 214 are elastic rubber pads. When the brush roller bracket assembly slides along the left and right directions and approaches the limiting end cover on the sliding rod support 211, the buffer pads 214 contact the first brush roller bracket 27 or the second brush roller bracket 23 and form a buffer to avoid the brush roller bracket assembly from colliding with the limiting end cover 213.

[0069] Furthermore, a through sealing hole is provided in the middle of the limiting end cover 213 and the locking end cover 217b, and the horizontal sliding rod 22 passes through the sealing hole. A sealing ring 215 is provided in the sealing hole. The sealing ring 215 is usually an oil seal. The sealing ring 215 is located between the horizontal sliding rod 22 and the limiting end cover. When the horizontal sliding rod 22 and the brush roller bracket assembly slide synchronously in the left and right directions, the sealing ring 215 can block the sewage and iron filings from affecting the sealing of the brush roller bracket assembly or the sliding rod support 211, thereby ensuring the smooth sliding of the sliding rod 211.

[0070] Furthermore, support rails 26 are symmetrically provided above the walking mechanism 1 along the front-to-back direction, and rollers 29 are correspondingly provided on the front and rear sides of the base 21. The rollers 29 are always in contact with the support rails 26, and drive the roller seat 2 to move along the left and right directions on the support rails 26 through their own rotation; compared with the guide rail design, the design of the rollers 29 can transform the sliding friction between the roller seat 2 and the support rail 26 into rolling friction, and the friction force generated is smaller, so that the sliding process of the roller seat 2 along the left and right directions can be smoother.

[0071] Further, if Fig.10 As shown, after the brush roller bracket assembly is locked and connected with the horizontal sliding rod 22, it can slide in the left and right directions on the sliding rod support 211 under the action of the driving mechanism. The brush roller bracket assembly, as a receiving assembly for the brush roller, needs to move left and right to complete the alignment process with the brush roller. If the brush roller bracket assembly is in a sliding state on the roller seat 2, a distance will be generated between the brush roller bracket assembly and the sliding rod support 211. This distance can form a force arm. The brush roller's own gravity will rely on this force arm to produce a vertical torsional effect on the sliding rod support 211, which can easily cause the sliding support 211 to deform. Therefore, the sliding rod support 211 in the sliding rod support assembly alone cannot form a stable support for the brush roller in the sliding state. Therefore, front-to-back symmetrical and detachable auxiliary support assemblies are connected between the first brush roller bracket 27, the second brush roller bracket 23 and the base 21. The auxiliary support assembly includes a The strip body 219 at the upper end of the seat 21 and the corresponding pad 232 connected to the bottom of the first brush roller bracket 27 or the second brush roller bracket 23, when the sliding rod assembly drives the brush roller bracket assembly to slide left and right on the sliding rod support 211, the pad 232 and the strip body 219 are always in contact and generate relative sliding, so that the auxiliary support assembly and the sliding support assembly form a double support for the first brush roller bracket 27 and the second brush roller bracket 23; when the roller connecting mechanism receives the brush roller and slides in the left and right directions, the auxiliary support assembly and the sliding support assembly can form four support points on the horizontal sliding rod for the brush roller bracket assembly and the brush roller in the sliding state, so that the brush roller and the brush roller bracket assembly are more stable when sliding, which can effectively protect the brush roller bracket assembly from tipping over when sliding; and the detachable strip body 219 and pad 232 are easy to disassemble and replace, which reduces the maintenance cost of the auxiliary support assembly.

[0072] Furthermore, the material of the strip body 219 is usually nylon, and the material of the pad 232 is copper alloy. This is because the strip body 219 and the pad 232 that slide relative to each other in the left and right directions always generate contact friction, so the strip body 219 and the pad 232 are both made of wear-resistant materials; specifically, the working conditions of the roller seat 2 inside the steel plate brushing equipment 4 are harsh, and lubricating oil cannot be added to reduce the wear of the pad 232. If the strip body 219 and the pad 232 are both made of copper alloy, then the strip body 219 and the pad 232 will wear at the same time, causing an increase in cost. Therefore, when the pad 232 made of copper alloy and the strip body 219 made of nylon are in contact, the surface of the pad 232 is not easy to wear relative to the strip body 219, which plays a protective role for the pad 232; even if the strip body 219 made of nylon is worn, its material cost is relatively low compared to the pad 232 made of copper alloy, and the use cost of the strip body 219 will not increase.

[0073] Specifically, the bottom of the walking mechanism 1 has four rotating wheels 13, and the bottom of the rotating wheel 13 has a steel rail a that matches it. The steel rail a is preset at the side position of the steel plate grinding and brushing equipment 4 along the front and rear directions. The rotating wheel 13 rotates at the upper end of the steel rail a. The steel rail a reduces the friction between the rotating wheel 13 and the ground, so that the walking mechanism 1 and the roller seat 2 can move smoothly along the front and rear directions.

[0074] Further, if Figure 1-2 As shown, the steel plate brush grinding equipment 4 has an upper brush roller and a lower brush roller inside. Therefore, in order to realize the replacement of brush rollers at different positions, the roll changing vehicle has two high support frames 11 and low support frames 12 with different heights arranged side by side front and back, and roller seats 2 that can slide left and right are arranged respectively on these two support frames. In this way, the roll changing vehicle has the function of replacing the upper brush roller and the lower brush roller at the same time through the design of support frames with different heights, thereby improving the efficiency of brush roller replacement.

[0075] Specifically, the steel plate brushing equipment 4 has a self-limiting track 3 corresponding to the position of the roller seat 2, and the self-limiting track 3 is a sliding support for the roller seat 2 in the steel plate brushing equipment 4; the self-limiting track 3 has a self-limiting mechanism for controlling the sliding state of the roller seat 2; when the roller seat 2 slides along the left and right directions to the corresponding position inside the steel plate brushing equipment 4, the self-limiting mechanism can automatically limit the roller seat 2 from continuing to slide in the left and right directions; the self-limiting track 3 can automatically limit the roller seat 2 through the self-limiting mechanism when the roller seat 2 enters the steel plate brushing equipment 4 to change rollers, thereby saving the adjustment time of the limiting mechanism and keeping the roller seat 2 fixed inside the steel plate brush 4 to perform a stable roller changing process.

[0076] Specifically, the handle 24 is provided with a manual valve d connected to the drive mechanism, and the manual valve d is connected to the drive mechanism of the cylinder 25 through an air pipe (not shown in the figure). When the rollers are matched, the telescopic rod 251 of the cylinder 25 can be controlled to be extended and retracted in the left and right directions by pulling the manual valve d, so that the connecting roller assembly and the old brush roller are aligned up and down; the manual valve d at the handle 24 is far away from the inside of the steel plate grinding and brushing equipment 4, and is not easy to contact with the grinding and brushing wastewater or debris in the plate grinding and brushing equipment 4, so that the manual valve d can be smoothly operated by hand during the roller changing process to control the drive mechanism, thereby improving the efficiency of the roller seat matching.

[0077] Furthermore, the left and right ends of the horizontal slide bar 22 are protruded from the roller seat 2. In order to prevent the horizontal slide bar 22 from sliding out of the base 21, the left and right ends are connected with nuts 28; when the driving mechanism drives the connecting roller assembly to slide left and right, so that the left and right ends of the horizontal slide bar 22 are about to slide out of the slide bar support 211 or the brush roller bracket assembly, the nut 28 abuts against the slide bar support 211 or the brush roller bracket assembly to limit the horizontal slide bar 22 from separating from the slide bar support 211 or the brush roller bracket assembly.

[0078] Specifically, if Figure 12a-12b As shown, the clamping roller mechanism includes a sliding bearing seat and a fixed bearing seat for clamping the brush roller. The sliding bearing seat can slide in the left and right directions. The specific structure of the clamping roller mechanism is the prior art. For details, reference may be made to the structural description of the working main beam in the announcement number CN211103286; the difference is that, in the present embodiment, the sliding bearing seat is provided with a hook portion corresponding to the position of the nut 28. When the sliding bearing seat is disengaged from the old brush roller in the left and right directions, the hook portion pulls the nut 28 near the position of the first brush roller bracket 27, so that the horizontal slide bar 22 drives the old brush roller to separate from the fixed bearing seat; the nut 28 near the position of the first brush roller bracket 27 not only limits the horizontal slide bar 22 from sliding out of the roller seat 2, but also is the connecting mechanism of the clamping roller mechanism. By pulling the corresponding nut 28 through the hook portion, the two axial ends of the brush roller can be quickly disengaged from the clamping roller mechanism and fall smoothly on the brush roller bracket assembly.

[0079] Further, if Figure 8 As shown, the front end of the walking mechanism 1 has a traction handle 111 which is easy to grasp by hand. The traction handle 111 is set on the high-position support frame 11, and can drive the walking mechanism 1 and the roller seat 2 to or away from the steel plate grinding and brushing equipment 4 along the front and rear direction under manual push and pull; the traction handle 111 is easy to grasp by hand, so that the walking mechanism 1 can move along the front and rear direction under manual push and pull, and there is no need to set a walking motor on the walking mechanism, which further simplifies the structure of the roller changing vehicle and reduces the cost of the walking mechanism 1.

[0080] Furthermore, the roll-changing vehicle moved to the roll-changing station needs to remain fixed for the next roll-changing operation, so a socket c is provided on the ground at the roll-changing station, and a positioning mechanism is provided at the front end of the walking mechanism 1, and the positioning mechanism is arranged on the high-position support frame 11, which includes a lap plate 15 and a plug column 16 that can be extended up and down, and the lap plate 15 is symmetrically provided with two ends of the plug column 16 along the left and right directions, and the plug column 16 can rotate circumferentially with the vertical axis as the center; a handle 14 is provided on the upper end of the lap plate 15; when the walking mechanism 1 needs to remain fixed, the handle 14 can be moved circumferentially by toggling the handle 14 Rotate until it is separated from the lap plate 15, so that the lower end of the column 16 extends downward and is inserted into the socket c, thereby keeping the walking mechanism 1 fixed; when the walking mechanism 1 needs to move forward and backward, the column 16 is retracted upward by pulling the handle 14, and the handle 14 is moved again to make it rotate in the opposite direction and then overlap the upper end of the lap plate 15, thereby releasing the walking mechanism 1 from the fixed state; when changing the roller, the handle 14 is manually controlled to overlap or separate from the lap plate 15, thereby separating or cooperating with the column 16 and the socket c, thereby realizing manual control of the movement state of the walking mechanism 1 in the forward and backward directions, so that the roller connection process proceeds smoothly.

[0081] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A self-limiting mechanism on a track, the self-limiting mechanism being installed between a track plate (31) on a steel plate brushing device (4) and a frame at an entrance of the steel plate brushing device (4), and being capable of limiting the position of a roller seat (2) sliding along the track plate (31) from the entrance of the steel plate brushing device (4) into the steel plate brushing device (4), characterized in that: The self-limiting mechanism comprises a rotating plate (326), the rotating plate (326) having an initial position and being elastically rotatable up and down along the initial position, and one end of the rotating plate (326) facing the steel plate grinding and brushing device (4) being configured as a limiting portion capable of limiting the roller seat (2) from sliding out of the steel plate grinding and brushing device (4); When the roller seat (2) slides into the steel plate grinding and brushing device (4), the rotating plate (326) can elastically rotate upward along the initial position after contacting the roller seat (2), so that the roller seat (2) slides from below the rotating plate (326) to the limiting portion. At this time, the rotating plate (326) elastically rotates downward and returns to the initial position, and the limiting portion cooperates with the roller seat (2) to limit the roller seat (2) from sliding out of the steel plate grinding and brushing device (4) in the reverse direction. When the roller seat (2) slides out of the steel plate grinding and brushing device (4), the rotating plate (326) can elastically rotate upward along the initial position again under the action of an external force, so that the limiting portion and the roller seat (2) are separated, so as to release the limit on the roller seat (2), thereby allowing the roller seat (2) to slide out of the steel plate grinding and brushing device (4) in the reverse direction.

2. The self-limiting mechanism on a track according to claim 1, characterized in that: The limiting portion and the track plate (31) are both connected with hook bolts (323), and a spring (324) is connected between the two hook bolts (323) to provide elastic rotation force for the rotating plate (326). When the rotating plate (326) is in the initial position, the spring (324) is in a stretched state. When the rotating plate (326) elastically rotates upward along the initial position, the spring (324) is further stretched. When the rotating plate (326) elastically rotates downward and returns to the initial position, the spring (324) contracts downward and returns to the initial stretched state.

3. The self-limiting mechanism on a track according to claim 2, characterized in that: A stopper (322) connected to the frame is provided above one end of the rotating plate (326) away from the limiting portion. When the rotating plate (326) is in the initial position, the spring (324) connected to the limiting portion is in a stretched state. At this time, the rotating plate (326) abuts against the stopper (322) above, limiting the upward rotation of the end of the rotating plate (326) away from the limiting portion.

4. The self-limiting mechanism on a track according to claim 2, characterized in that: The limiting portion of the rotating plate (326) is provided with a plurality of shift holes (327) arranged along its length direction, and the hook bolt (323) can cooperate with the shift holes (327) at different positions to adjust the elastic tension of the spring (324) and the rotating plate (326).

5. The self-limiting mechanism on a track according to claim 1, characterized in that: A matching portion (243) is provided on the roller seat (2), and a limiting plate (328) is connected to the limiting portion. A limiting surface (329) corresponding to the position of the matching portion (243) is provided on one end of the limiting plate (328) facing the steel plate grinding and brushing device (4). When the limiting surface (329) fits the outer contour of the matching portion (243), the roller seat (2) can be limited from sliding out of the steel plate grinding and brushing device (4); when the limiting surface (329) is separated from the roller seat (2), the limiting plate (328) releases the limit on the roller seat (2), thereby allowing the roller seat (2) to slide out of the steel plate grinding and brushing device (4) in the reverse direction.

6. The self-limiting mechanism on a track according to claim 5, characterized in that: A guide slope (s) extending obliquely downward is provided on one end of the limit plate (328) facing away from the steel plate brushing device (4). When the roller seat (2) slides into the steel plate brushing device (4), the guide slope (s) can contact the matching portion (243) and drive the rotating plate (326) to rotate elastically upward to guide the roller seat (2) to slide into the steel plate brushing device (4).

7. The self-limiting mechanism on a track according to claim 6, characterized in that: The matching portion (243) is an annular member connected to the roller seat (2) and capable of circumferential rotation. When the guide inclined surface (s) contacts the matching portion (243), the annular member can roll on the guide inclined surface (s) by its own circumferential rotation until the matching portion (243) fits the outer contour of the limiting surface (329).

8. The self-limiting mechanism on a track according to claim 1, characterized in that: One end of the rotating plate (326) away from the limiting portion is connected to a lever (321). When the roller seat (2) slides out of the steel plate grinding and brushing device (4), the lever (321) can be manually pushed downward to elastically rotate the rotating plate (326) upward again along the initial position, thereby separating the limiting portion from the roller seat (2) to release the limiting of the roller seat (2).

9. The self-limiting mechanism on a track according to claim 1, characterized in that: The self-limiting mechanism further comprises an internal limiting assembly (33) connected to the track plate (31); the internal limiting assembly (33) is located in the steel plate grinding and brushing device (4) and comprises a clamping plate (331) and a limiting bolt (332) connected to the clamping plate (331); when the limiting portion cooperates with the roller seat (2), the limiting bolt (332) abuts against the roller seat (2) to limit the roller seat (2) from sliding into the steel plate grinding and brushing device (4).

10. The self-limiting mechanism on a track according to claim 9, characterized in that: The limiting bolt (332) is locked on the clamping plate (331) by means of a locking nut (333) in a threaded connection manner, and the locking nut (333) can adjust the matching length between the limiting bolt (332) and the clamping plate (331) by rotating itself.

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