A sliding door structure, including a grinding device for the structure and a rail grinding vehicle

Abstract

The present invention discloses a sliding door structure, including a grinding device and a rail grinding vehicle of the structure. The sliding door structure includes: a first and a second limiting portion extending along the working direction and arranged parallel to each other, the first limiting portion being arranged at the top of the grinding device, and the second limiting portion being arranged at the side of the grinding device; a first and a second baffle being respectively installed at the front and rear ends of the first and second limiting portions along the working direction; and a first sliding door and a second sliding door being installed between the first and second baffles along the front and rear directions of the working. The tops of the first and second sliding doors are connected to the first limiting portion by sliding or rolling, and the bottoms of the first and second sliding doors are connected to the second limiting portion by sliding or rolling. A closed structure for the side of the grinding device is formed by the first and second sliding doors and the first and second baffles. The present invention can solve the technical problems of existing door structures, such as the inconvenience of disassembly and maintenance due to the heavy and wide structure, or the limited opening and closing angles of the doors, which restrict the upper space.

Description

Technical Field

[0001] The present invention relates to the technical field of rail engineering machinery, and in particular to a sliding door structure used in a rail grinding vehicle, comprising a grinding device of the structure and the rail grinding vehicle. Background Art

[0002] Rails are exposed to harsh working conditions for extended periods during train operation. Multiple factors, including dynamic forces, the natural environment, and rail quality, often lead to deteriorating rail surface conditions and rail head deformation, resulting in defects such as wave wear, fat edges, spalling, and rail scaling, seriously impacting operational safety. Rail grinding can remove surface irregularities and restore the rail head to its original design requirements, effectively improving the wheel-rail relationship, slowing the development of surface defects, improving rail surface smoothness, and extending rail service life.

[0003] The rail grinding unit is the actuator for the rail grinding operation and a key component of the rail grinding train. The rail grinding process generates a large amount of dust and hot iron chips. To prevent the chips from flying around, the rail grinding unit is typically enclosed within a relatively sealed enclosure using metal components. Immediate maintenance is typically required after rail grinding is completed, requiring the metal components on both sides of the unit to be opened or disassembled. Currently, these components primarily take the following two forms.

[0004] The first type is a fully removable door structure. The top of the door in this structure is attached to the grinding device frame and secured with a latch. The latch holder is mounted on the end baffles, and a movable connection ensures the removability of the side baffles. Therefore, when the grinding device needs maintenance, the side baffles can be directly removed. This design structure has the following disadvantages: the grinding device forms a relatively closed environment due to its external frame, and inspection and maintenance of the internal grinding unit require the removal of both door panels. However, this fully removable door panel structure is heavy and large, requiring considerable effort to remove and lift it to the appropriate placement. However, the working environment at railway grinding and maintenance sites is harsh, and ample space for door panel placement is limited. Therefore, this type of door panel imposes a significant workload and inconvenience on construction personnel.

[0005] The second type is a hinged door structure. The door structure of this type of grinding device is connected to the top frame via a hinge. The door can rotate around the hinge on a fixed axis, allowing it to be opened and closed directly via a door handle. When the door is closed, a locking pin secures it. One end of a hydraulic cylinder is fixed to the end plate, and the other end is connected to the device door. The cylinder's cushioning effect ensures smooth opening and closing of the device door. When internal structures, such as the grinding unit, need to be inspected or maintained during operation, the door can be opened upwards to directly access the grinding device's internal components. This design has the following disadvantages: the hinged door structure rotates around the top to open at a certain angle. Due to its inherent structure and the grinding device's upper structure, the door's opening and closing angle is limited, and the upper space is still restricted. Furthermore, when grinding long tunnels, the door panel cannot be opened for inspection and maintenance. At the same time, hinged door panels are prone to hinge damage and support damage, and the space that can be lifted on the upper part is limited, which cannot form sufficient maintenance space. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a sliding door structure, including a grinding device and a rail grinding vehicle of the structure, so as to solve the technical problems that the existing door structure or structure is bulky and wide, resulting in inconvenience in disassembly and maintenance, or the door opening and closing angle is limited, and the upper space is still restricted.

[0007] In order to achieve the above-mentioned object of the invention, the present invention specifically provides a technical implementation solution of a sliding door structure, which is installed on the side of the rail grinding device and includes:

[0008] A first limiting portion and a second limiting portion extending along the operating direction of the rail grinding vehicle and arranged parallel to each other, the first limiting portion being arranged on the top of the rail grinding device, and the second limiting portion being arranged on the side of the rail grinding device;

[0009] A first baffle and a second baffle are respectively installed at the front and rear ends of the first limiting portion and the second limiting portion along the operating direction of the rail grinding vehicle;

[0010] A first sliding door and a second sliding door are installed between the first baffle and the second baffle along the front-rear direction of the rail grinding vehicle; the tops of the first sliding door and the second sliding door are slidably or rolledly mounted to the first limiting portion; the bottoms of the first sliding door and the second sliding door are slidably or rolledly mounted to the second limiting portion;

[0011] The first sliding door, the second sliding door, the first baffle and the second baffle form a closed structure for the side of the rail grinding device.

[0012] Preferably, the first sliding door includes a first roller and a second roller, the first roller is arranged under the top side of the first sliding door along the operating direction of the rail grinding vehicle, and the second roller is arranged under the bottom side of the first sliding door along the operating direction of the rail grinding vehicle.

[0013] Furthermore, the first limiting portion includes a first chute and a second chute extending along the operating direction of the rail grinding vehicle and arranged vertically side by side. The first chute and the second chute are both U-shaped chute with an upward opening, and the first chute is located above the second chute.

[0014] Preferably, the second sliding door includes a third roller and a fourth roller, the third roller is arranged under the top side of the second sliding door along the operating direction of the rail grinding vehicle, and the fourth roller is arranged under the bottom side of the second sliding door along the operating direction of the rail grinding vehicle.

[0015] Furthermore, the second limiting portion includes a third chute and a fourth chute extending along the operating direction of the rail grinding vehicle and arranged side by side in a transverse direction. The third chute and the fourth chute are both U-shaped chute with an upward opening, and the third chute is located inside the fourth chute.

[0016] Preferably, both side edges of the first sliding door along the operating direction of the rail grinding vehicle are bent inward to form a first hem and a second hem, respectively, and the top edge of the first sliding door is bent to form a third hem in the shape of an inverted "X." The first roller is disposed at the outer bottom of the third hem, the first roller rolling in a first chute, and the second roller rolling in a fourth chute.

[0017] Furthermore, a first groove with an upward opening is formed in the middle portion of the third folded edge along the operating direction of the rail grinding vehicle.

[0018] Preferably, one side edge of the second sliding door along the operating direction of the rail grinding vehicle is bent outward to form a fourth fold, and the other side edge is bent inward to form a fifth fold. The top edge of the second sliding door is bent to form a sixth fold in the shape of an inverted "X". The third roller is disposed at the outer bottom of the sixth fold, the third roller rolls in the second chute, and the fourth roller rolls in the third chute. When the sliding door structure is in an open state, the first sliding door partially or completely covers the exterior of the second sliding door. When the sliding door structure is in a closed state, the first fold covers the exterior of the fourth fold.

[0019] Furthermore, a second groove with an upward opening is formed in the middle portion of the sixth folded edge along the operating direction of the rail grinding vehicle.

[0020] Preferably, the side of the second chute is provided with first notches, the number and position of the first notches correspond to the third roller. When the second sliding door is installed, the first notches are sealed by a first sealing plate.

[0021] Preferably, the side of the third chute is provided with a second notch, the number and position of the second notch corresponding to the fourth roller. When the second sliding door is installed, the second notch is closed by a second sealing plate.

[0022] Furthermore, the first sliding door is provided with a first handle, and the second sliding door is provided with a second handle.

[0023] The present invention further specifically provides a technical implementation solution of a grinding device, including:

[0024] The sliding door structure provided on the side of the grinding device as described above;

[0025] A top cover plate is provided on the top of the polishing device, and a dust collection channel is provided on the upper portion of the top cover plate;

[0026] End baffles provided at the lower portions of the front and rear ends of the top cover along the working direction;

[0027] The lower parts of the sliding door structure and the end baffles are both connected with fire curtains.

[0028] The present invention further specifically provides a technical implementation solution for a rail grinding vehicle, comprising: a vehicle body, and the grinding device as described above installed below the vehicle body.

[0029] By implementing the above-mentioned sliding door structure provided by the present invention, including the technical solution of the grinding device and rail grinding vehicle of the structure, the following beneficial effects are achieved:

[0030] (1) The sliding door structure of the present invention includes a grinding device and a rail grinding vehicle of the structure. The sliding door adopts a double-sided sliding door structure. When in use, the door opening width and position of the sliding door structure can be adjusted according to actual conditions by moving the left and right sliding doors. The operation is simpler and more flexible, avoiding the trouble of disassembling the sliding door structure during general maintenance and repair, and ensuring sufficient maintenance and operation space.

[0031] (2) The sliding door structure of the present invention includes a grinding device and a rail grinding vehicle of the structure. The sliding door adopts an integral structure. When the sliding door structure is opened to one side, there is no door panel blocking the other side, thereby avoiding the limitation of the sliding door structure on space. When the internal structure of the grinding device needs to be repaired and maintained, the sliding door can be directly slid open, making the repair and maintenance work of the grinding vehicle more convenient and quick. At the same time, the sliding door can also be removed as a whole to repair the grinding device.

[0032] (3) The sliding door structure of the present invention includes a grinding device and a rail grinding vehicle of the structure, wherein the first limiting portion of the sliding door includes two sub-slide grooves arranged vertically side by side, and the second limiting portion includes two sub-slide grooves arranged horizontally side by side. The left and right sliding doors are in front and back positions, and the rollers of the two sliding doors slide in their respective independent slide grooves, thereby ensuring that the two sliding doors can slide to either end without interference;

[0033] (4) The sliding door structure of the present invention includes a grinding device and a rail grinding vehicle of the structure. A notch is provided on the sliding groove of the sliding door at a position corresponding to the roller. When the roller is aligned with the notch, the door can be installed or removed. When the sliding door does not need to be installed or removed, the opening of the sliding groove is sealed by a square plate, which can fully ensure the safety of the sliding door during movement.

[0034] (5) The sliding door structure of the present invention includes a grinding device and a rail grinding vehicle of the structure. One of the sliding doors has both sides of the edges along the working direction bent inward to form a first folding edge and a second folding edge respectively. Another sliding door has one side of the edge along the working direction bent outward to form a fourth folding edge, and the other side of the edge is bent inward to form a fifth folding edge. When the sliding door structure is in a closed state, the first folding edge is covered on the outside of the fourth folding edge, thereby fully ensuring the airtightness of the sliding door structure when it is closed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other embodiments can be derived from these drawings without inventive effort.

[0036] Figure 1 This is a structural diagram of a specific embodiment of the sliding door structure of the present invention;

[0037] Figure 2 This is a schematic structural diagram of a specific embodiment of the sliding door structure of the present invention in a partially open state;

[0038] Figure 3 is a structural schematic diagram of a specific embodiment of the sliding door structure of the present invention from another perspective;

[0039] Figure 4 This is a schematic side view of the structure of a first sliding door in a specific embodiment of the sliding door structure of the present invention;

[0040] Figure 5 This is a schematic isometric view of the structure of a first sliding door in a specific embodiment of the sliding door structure of the present invention;

[0041] Figure 6 This is a schematic structural diagram of a first sliding door in a specific embodiment of the sliding door structure of the present invention from another perspective;

[0042] Figure 7 This is a schematic side view of the structure of a second sliding door in a specific embodiment of the sliding door structure of the present invention;

[0043] Figure 8 This is a schematic isometric view of the structure of a second sliding door in a specific embodiment of the sliding door structure of the present invention;

[0044] Figure 9 This is a schematic structural diagram of a second sliding door in a specific embodiment of the sliding door structure of the present invention from another perspective;

[0045] Figure 10 This is a structural diagram of a specific embodiment of the sliding door structure of the present invention with the sliding door removed;

[0046] Figure 11 yes Figure 10 A schematic diagram of the partially enlarged structure of part A;

[0047] Figure 12 yes Figure 10 A schematic diagram of the partially enlarged structure of part B;

[0048] Figure 13 It is a structural schematic diagram of a specific embodiment of the grinding device of the present invention;

[0049] Figure 14 It is a structural schematic diagram of a specific embodiment of the rail grinding vehicle of the present invention;

[0050] In the figure: 1-first sliding door, 2-second sliding door, 3-first limiting portion, 4-second limiting portion, 5-first baffle, 6-second baffle, 10-sliding door structure, 11-first folding edge, 12-second folding edge, 13-third folding edge, 14-first groove, 15-first roller, 16-second roller, 17-first handle, 20-top cover, 21-fourth folding edge, 22-fifth folding edge, 23-sixth folding edge, 24-second groove, 25-third roller, 26-fourth roller, 27-second handle, 30-dust collection channel, 31-first chute, 32-second chute, 33-first notch, 34-first sealing plate, 40-end baffle, 41-third chute, 42-fourth chute, 43-second notch, 44-second sealing plate, 50-fire curtain, 100-grinding device, 200-rail grinding vehicle, 300-vehicle body. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] As attached Figure 1 To the attached Figure 14 As shown, a specific embodiment of the sliding door structure of the present invention, including a grinding device of the structure and a rail grinding vehicle is given. The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0053] Example 1

[0054] As attached Figure 1 、 2 As shown in FIG3 , an embodiment of a sliding door structure is installed on the side of a grinding device 100 . The sliding door structure 10 specifically includes:

[0055] A first stopper 3 and a second stopper 4 are provided parallel to each other and extend along the operating direction of the rail grinding vehicle 200 (as indicated by L in the accompanying drawings). The first stopper 3 is provided on the top of the grinding device 100, and the second stopper 4 is provided on the side of the grinding device 100.

[0056] A first baffle 5 and a second baffle 6 are respectively installed at the front and rear ends of the first limiting portion 3 and the second limiting portion 4 along the operating direction of the rail grinding vehicle 200;

[0057] The first sliding door 1 and the second sliding door 2 are installed between the first baffle 5 and the second baffle 6 along the front-back direction of the rail grinding vehicle 200; the tops of the first sliding door 1 and the second sliding door 2 are slidably or rolledly mounted to the first limit portion 3; the bottoms of the first sliding door 1 and the second sliding door 2 are slidably or rolledly mounted to the second limit portion 4;

[0058] The first sliding door 1 , the second sliding door 2 , the first baffle 5 and the second baffle 6 form a closed structure for the side of the grinding device 100 .

[0059] Traditional hanging door structures require the removal of the doors for inspection and maintenance of internal grinding units, which increases the workload for general maintenance of the grinding device. The sliding door structure 10 described in this embodiment adopts a double-sided sliding door structure and is widely applicable to various types of rail grinding devices. During use, the left or right sliding door is moved by a handle, and the position and width of the sliding door opening are adjusted according to actual conditions. This makes operation simpler and more flexible, saving time and effort, and has strong applicability. At the same time, the first sliding door 1 and the second sliding door 2 can also be removed as a whole when necessary to perform maintenance and repair on the grinding device 100. Traditional hinged door structures rotate the door around the top to open at a certain angle. Due to structural constraints, the door opening and closing angle is limited, and the upper space is still restricted. The sliding door structure 10 described in this embodiment has a first sliding door 1 and a second sliding door 2 that utilize an integral sliding door panel structure. When the sliding door structure 10 is opened to one side, the other side is unobstructed by the door panels (i.e., the first sliding door 1 and the second sliding door 2). This eliminates the space restrictions imposed by the vehicle doors (i.e., the sliding door structure 10). When the internal structure of the grinding device needs to be repaired and maintained, the vehicle doors can be directly opened by sliding the handle, making maintenance work on the grinding cart more convenient and quick. In areas where open door panels are being polished, the door panels can be pushed to one side and secured before polishing, enabling safe and reliable polishing.

[0060] As attached Figure 4 、 5 As shown in FIG6 , the first sliding door 1 further includes a first roller 15 and a second roller 16. The first roller 15 is arranged below the top side of the first sliding door 1 along the working direction of the rail grinding vehicle 200, and the second roller 16 is arranged below the bottom side of the first sliding door 1 along the working direction of the rail grinding vehicle 200. Figure 7 、 8 As shown in Figures 9 and 10, the second sliding door 2 further includes a third roller 25 and a fourth roller 26. The third roller 25 is disposed below the top side of the second sliding door 2 along the operating direction of the rail grinding vehicle 200, and the fourth roller 26 is disposed below the bottom side of the second sliding door 2 along the operating direction of the rail grinding vehicle 200. The first baffle 5 and the second baffle 6 are mounted at both ends of the limiting portion (i.e., the first limiting portion 3 and the second limiting portion 4) to limit the extreme positions of the door panel and ensure that the rollers do not disengage from the limiting portion. After the vehicle door slides to the baffle side, a conventional locking mechanism (e.g., a latch, a lock catch, etc.) can be used to secure the position of the sliding door relative to the baffle. The sliding door structure 10 described in this embodiment adopts a double-sided sliding door structure with rollers. The left or right sliding door can be moved by a handle, and the door opening width and position can be adjusted according to actual conditions. This avoids the trouble of disassembling the vehicle door during general maintenance and repairs, while also ensuring sufficient maintenance space.

[0061] As attached Figure 10 and 11As shown, the first limiting portion 3 further includes a first chute 31 and a second chute 32 extending along the operating direction of the rail grinding vehicle 200 and arranged vertically side by side. The first chute 31 and the second chute 32 are both U-shaped chute openings facing upward, and the first chute 31 is located above the second chute 32. The second limiting portion 4 further includes a third chute 41 and a fourth chute 42 extending along the operating direction of the rail grinding vehicle 200 and arranged horizontally side by side. The third chute 41 and the fourth chute 42 are both U-shaped chute openings facing upward, and the third chute 41 is located on the inner side of the fourth chute 42. The first limiting portion 3 includes two sub-chute openings arranged vertically side by side, and the second limiting portion 4 includes two sub-chute openings arranged horizontally side by side. The left and right sliding doors are in the front and rear positions, and the rollers of the two sliding doors slide in their respective independent chute openings, thereby ensuring that the two sliding doors can slide to either end without interference.

[0062] As attached Figure 6 As shown, both side edges of the first sliding door 1 along the operating direction of the rail grinding vehicle 200 are bent inward to form a first folding edge 11 and a second folding edge 12, respectively. The top edge of the first sliding door 1 is bent to form an inverted "X"-shaped third folding edge 13. The first roller 15 is set at the outer bottom of the third folding edge 13. The first roller 15 rolls in the first chute 31, and the second roller 16 rolls in the fourth chute 42. The middle part of the third folding edge 13 is formed with a first groove 14 with an opening facing upward along the operating direction of the rail grinding vehicle 200. As shown in the attached figure, Figure 5 and 6 As shown, the first sliding door 1 is further provided with a first handle 17 .

[0063] As attached Figure 8 and 9 As shown, one side edge of the second sliding door 2 along the operating direction of the rail grinding vehicle 200 is bent outward to form a fourth fold 21, and the other side is bent inward to form a fifth fold 22. The top edge of the second sliding door 2 is bent to form an inverted "X"-shaped sixth fold 23. The third roller 25 is arranged at the outer bottom of the sixth fold 23, the third roller 25 rolls in the second slide 32, and the fourth roller 26 rolls in the third slide 41. When the sliding door structure 10 is in an open state, the first sliding door 1 is partially or completely covered by the outside of the second sliding door 2. When the sliding door structure 10 is in a closed state, the first fold 11 is covered by the outside of the fourth fold 21. A second groove 24 with an opening facing upward is formed in the middle of the sixth fold 23 along the operating direction of the rail grinding vehicle 200. As shown in the attached Figure 8 As shown, the second sliding door 2 is further provided with a second handle 27 .

[0064] The sliding door structure 10 described in this embodiment utilizes rollers that move within a sliding groove to achieve the structure's sliding function. One sliding door has both edges bent inward along the operating direction, forming a first hem 11 and a second hem 12. The other sliding door has one edge bent outward along the operating direction, forming a fourth hem 21, and the other edge bent inward, forming a fifth hem 22. When the sliding door structure is closed, the first hem 11 wraps around the outside of the fourth hem 21, fully ensuring the airtightness of the sliding door structure when closed.

[0065] As attached Figure 12 As shown, the side of the second slide 32 is provided with a first notch 33, and the number and position of the first notch 33 correspond to the third roller 25. When the second sliding door 2 is installed, the first notch 33 is closed by the first sealing plate 34. The side of the third slide 41 is provided with a second notch 43, and the number and position of the second notch 43 correspond to the fourth roller 26. When the second sliding door 2 is installed, the second notch 43 is closed by the second sealing plate 44. A notch is provided on the slide at a position corresponding to the roller. When the roller and the notch are in the center position, the car door can be installed and disassembled. When there is no need to disassemble the sliding door, the slide opening is sealed by a square plate, which can fully ensure the safety of the sliding door during movement.

[0066] While Example 1 specifically describes and illustrates the sliding door structure 10 of the present invention using a door transverse sliding structure incorporating rollers and slideways as an example, the door transverse sliding structure may also employ other structures capable of achieving a movable pair, such as a guide rail and a sleeve. Furthermore, the sliding door panel structures of the first sliding door 1 and the second sliding door 2 may also be designed in various forms depending on the structure of the polishing device 100.

[0067] Example 2

[0068] As attached Figure 13 As shown, a specific embodiment of a grinding device 100 includes the sliding door structure 10 described in Example 1, wherein the sliding door structure 10 is mounted on the side of the grinding device 100. The grinding device 100 also includes a top cover plate 20, a dust collection channel 30, an end baffle 40, and a fire curtain 50. The dust collection channel 30 is arranged above the top cover plate 20, and dust generated during the grinding process enters the dust collection device through the dust collection channel 30. The end baffles 40 are arranged below the top cover plate 20 at the front and rear ends along the operating direction of the rail grinding vehicle 200. The lower portions of the sliding door structure 10 and the end baffles 40 are connected to the fire curtain 50.

[0069] Example 3

[0070] As attached Figure 14As shown, a specific embodiment of a rail grinding vehicle 200 including the grinding device 100 described in Example 2 is shown, and the grinding device 100 is integrally installed below the vehicle body 300 of the rail grinding vehicle 200.

[0071] By implementing the sliding door structure described in the specific embodiment of the present invention, including the technical solution of the grinding device and rail grinding vehicle of the structure, the following technical effects can be achieved:

[0072] (1) The sliding door structure described in the specific embodiment of the present invention includes a grinding device and a rail grinding vehicle of the structure. The sliding door adopts a double-sided sliding door structure. When in use, the door opening width and position of the sliding door structure can be adjusted according to actual conditions by moving the left and right sliding doors. The operation is simpler and more flexible, avoiding the trouble of disassembling the sliding door structure during general maintenance and repair, and ensuring sufficient maintenance operation space.

[0073] (2) The sliding door structure described in the specific embodiment of the present invention includes a grinding device and a rail grinding vehicle of the structure. The sliding door adopts an integral structure. When the sliding door structure is opened to one side, there is no door panel blocking the other side, thereby avoiding the limitation of the sliding door structure on space. When the internal structure of the grinding device needs to be repaired and maintained, the sliding door can be directly slid open, making the repair and maintenance work of the grinding vehicle more convenient and quick. At the same time, the sliding door can also be removed as a whole to repair the grinding device.

[0074] (3) The sliding door structure described in the specific embodiment of the present invention includes a grinding device and a rail grinding vehicle of the structure, wherein the first limiting portion of the sliding door includes two sub-slide grooves arranged vertically side by side, and the second limiting portion includes two sub-slide grooves arranged horizontally side by side. The left and right sliding doors are in front and back positions, and the rollers of the two sliding doors slide in their respective independent slide grooves, thereby ensuring that the two sliding doors can slide to either end without interference;

[0075] (4) The sliding door structure described in the specific embodiment of the present invention includes a grinding device and a rail grinding vehicle of the structure. A notch is provided on the sliding groove of the sliding door at a position corresponding to the roller. When the roller is aligned with the notch, the door can be installed or removed. When the sliding door does not need to be installed or removed, the opening of the sliding groove is sealed by a square plate, which can fully ensure the safety of the sliding door during movement.

[0076] (5) The sliding door structure described in the specific embodiment of the present invention includes a grinding device and a rail grinding vehicle of the structure. One of the sliding doors has both sides of the edges along the working direction bent inward to form a first folding edge and a second folding edge respectively. Another sliding door has one side of the edge along the working direction bent outward to form a fourth folding edge, and the other side of the edge is bent inward to form a fifth folding edge. When the sliding door structure is in a closed state, the first folding edge is covered on the outside of the fourth folding edge, which fully ensures the airtightness of the sliding door structure when it is closed.

[0077] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0078] The above description is only a preferred embodiment of the present invention and does not constitute any formal limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the spirit and technical solution of the present invention, use the methods and technical contents disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent replacement, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention, still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A sliding door structure, mounted on the side of a grinding device (100), characterized in that: The sliding door structure (10) comprises: A first limiting portion (3) and a second limiting portion (4) extending along the operating direction of the rail grinding vehicle (200) and arranged parallel to each other, the first limiting portion (3) being arranged on the top of the grinding device (100), and the second limiting portion (4) being arranged on the side of the grinding device (100); A first baffle (5) and a second baffle (6) are respectively mounted on the first limiting portion (3) and the second limiting portion (4) at the front and rear ends along the operating direction of the rail grinding vehicle (200); A first sliding door (1) and a second sliding door (2) are installed between the first baffle (5) and the second baffle (6) along the front-rear direction of the rail grinding vehicle (200); the tops of the first sliding door (1) and the second sliding door (2) are slidably or rollably installed to the first limiting portion (3); the bottoms of the first sliding door (1) and the second sliding door (2) are slidably or rollably installed to the second limiting portion (4); A closed structure for the side of the grinding device (100) is formed by the first sliding door (1), the second sliding door (2), the first baffle (5) and the second baffle (6); The first sliding door (1) comprises a first roller (15) and a second roller (16), wherein the first roller (15) is arranged below the top side of the first sliding door (1) along the operating direction of the rail grinding vehicle (200), and the second roller (16) is arranged below the bottom side of the first sliding door (1) along the operating direction of the rail grinding vehicle (200); The first limiting portion (3) includes a first chute (31) and a second chute (32) extending along the operating direction of the rail grinding vehicle (200) and arranged vertically side by side; the first chute (31) and the second chute (32) are both U-shaped chute openings facing upward, and the first chute (31) is located above the second chute (32); The second sliding door (2) includes a third roller (25) and a fourth roller (26), wherein the third roller (25) is arranged below the top side of the second sliding door (2) along the operating direction of the rail grinding vehicle (200), and the fourth roller (26) is arranged below the bottom side of the second sliding door (2) along the operating direction of the rail grinding vehicle (200); The second limiting portion (4) includes a third chute (41) and a fourth chute (42) extending along the operating direction of the rail grinding vehicle (200) and arranged side by side in a transverse direction; the third chute (41) and the fourth chute (42) are both U-shaped chute openings facing upward, and the third chute (41) is located on the inner side of the fourth chute (42); The edges of both sides of the first sliding door (1) along the operating direction of the rail grinding vehicle (200) are bent inward to form a first folding edge (11) and a second folding edge (12), respectively. The top edge of the first sliding door (1) is bent to form a third folding edge (13) in the shape of an inverted "X" (a character for "F"). The first roller (15) is arranged at the outer bottom of the third folding edge (13). The first roller (15) rolls in the first chute (31), and the second roller (16) rolls in the fourth chute (42). A first groove (14) with an upward opening is formed in the middle of the third folded edge (13) along the operating direction of the rail grinding vehicle (200); One side edge of the second sliding door (2) along the operating direction of the rail grinding vehicle (200) is bent outward to form a fourth folding edge (21), and the other side is bent inward to form a fifth folding edge (22), and the top edge of the second sliding door (2) is bent to form an inverted "F"-shaped sixth folding edge (23); the third roller (25) is arranged at the outer bottom of the sixth folding edge (23), the third roller (25) rolls in the second slide groove (32), and the fourth roller (26) rolls in the third slide groove (41); when the sliding door structure (10) is in an open state, the first sliding door (1) is partially or completely covered on the outside of the second sliding door (2); when the sliding door structure (10) is in a closed state, the first folding edge (11) is covered on the outside of the fourth folding edge (21); A second groove (24) with an upward opening is formed in the middle of the sixth folded edge (23) along the operating direction of the rail grinding vehicle (200); A first notch (33) is provided on the side of the second sliding groove (32), and the number and position of the first notch (33) correspond to the third roller (25); when the second sliding door (2) is installed, the first notch (33) is sealed by a first sealing plate (34); A second notch (43) is provided on the side of the third sliding groove (41), and the number and position of the second notch (43) correspond to the fourth roller (26); when the second sliding door (2) is installed, the second notch (43) is closed by a second sealing plate (44).

2. The sliding door structure according to claim 1, characterized in that: The first sliding door (1) is also provided with a first handle (17), and the second sliding door (2) is also provided with a second handle (27).

3. A grinding device, characterized in that: include: A sliding door structure (10) provided on the side of a grinding device (100) as claimed in claim 1 or 2; A top cover plate (20) is provided on the top of the polishing device (100), and a dust collection channel (30) is provided on the upper portion of the top cover plate (20); End baffles (40) provided at the lower portions of the front and rear ends of the top cover plate (20) along the working direction; The lower parts of the sliding door structure (10) and the end baffle (40) are both connected to a fire curtain (50).

4. A rail grinding vehicle, characterized in that: include: A vehicle body (300), and a grinding device (100) installed below the vehicle body (300) as claimed in claim 3.

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