Self-lubricating device for maintenance of large mining equipment

Abstract

The utility model belongs to the technical field of maintenance of mining equipment, and discloses a self-lubricating device for maintenance of large mining equipment, which comprises a cart, a storage box is placed on the upper surface of the cart, a groove is arranged on the upper surface of the cart, and a positioning mechanism for limiting the moving range of the storage box at the upper end of the cart is arranged in the groove of the cart. A lubricating mechanism is arranged on the upper surface of the cart, supporting mechanisms are installed on the front side and the rear side of the cart, and the inner walls of the positioning mechanisms abut against the front side, the rear side, the left side and the right side of the storage box correspondingly by adjusting and starting the positioning mechanisms, so that the positioning mechanisms limit the front-back and left-right moving positions of the storage box at the upper end of the cart; and therefore, the storage box is prevented from moving at the upper end of the trolley as much as possible when a worker pulls the trolley subsequently, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mine equipment maintenance, in particular to a self-lubricating device for maintenance of large-scale mine equipment. Background Art

[0002] With the continuous improvement of science and technology, people have used a variety of materials on the earth to improve people's quality of life. Among them, the use of ores can provide people with essential energy in life. The use of ores first requires mining. At this time, mining equipment is needed to help people mine. Due to the special environment of mines, it is very necessary to regularly maintain and inspect mining equipment during operation, especially in terms of lubrication.

[0003] For example, the utility model with announcement number CN215335718U discloses a self-lubricating device for large-scale mining equipment, including a base and wheels, wherein a plurality of wheels are fixedly connected to the bottom of the base, and a fixing device is installed on the top of the base. The self-lubricating device for large-scale mining equipment is realized by the mutual cooperation among structures such as a box, a rectangular block, a baffle, an arc-shaped block, and a cap. When the baffle enters the groove of the rectangular block, the baffle can press the box tightly and fix it through the rectangular block, thereby making the box more stable. The hydraulic cylinder, a first T-shaped plate, a centrifugal oil pump, a nozzle, a second vertical plate, an arc-shaped connecting rod, and a second slider can be driven by the hydraulic cylinder to rotate the arc-shaped connecting rod through the second slider, and the arc-shaped connecting rod drives the oil outlet pipe of the centrifugal oil pump to move through the second vertical plate, thereby adjusting the position of the nozzle on the oil outlet pipe of the centrifugal oil pump.

[0004] In the process of implementing this application, it was found that the technology has the following problems: the existing large-scale mining equipment self-lubricating device lubricates the equipment by starting the spraying mechanism to spray lubricating oil, but the lubricating oil sprayed by most nozzles easily drips to the ground, resulting in a waste of resources, thereby reducing the practicality of the equipment.

[0005] Therefore, a self-lubricating device for maintenance of large-scale mining equipment is proposed. Utility Model Content

[0006] The purpose of the utility model is to solve the problem that the existing self-lubricating device of large-scale mining equipment lubricates the equipment by starting the spraying mechanism to spray lubricating oil, but the lubricating oil sprayed by most nozzles easily drips to the ground, resulting in a waste of resources. The utility model provides a self-lubricating device for repairing large-scale mining equipment.

[0007] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0008] A self-lubricating device for repairing large-scale mining equipment includes a cart, a storage box is placed on the upper surface of the cart, a groove is provided on the upper surface of the cart, a positioning mechanism is provided inside the groove of the cart to limit the moving range of the storage box at the upper end of the cart, a lubrication assembly is provided on the upper surface of the cart, and support mechanisms are installed on the front and rear sides of the cart.

[0009] The U-shaped fixing plate is mounted on the upper surface of the cart, and the upper surface of the U-shaped fixing plate is provided with a through hole, and the handle is rotatably connected inside the through hole of the U-shaped fixing plate, and the lower surface of the handle is provided with a bevel gear second, and the external teeth of the bevel gear second are meshed and connected with the bevel gear first. The left and right inner walls of the cart groove are provided with through holes, and the two-way threaded rod is rotatably connected to the two sets of through holes of the cart, and the external threads of the two-way threaded rod are connected to two sets of L-shaped fixing rods, and the two sets of L-shaped fixing rods are slidably connected to the inside of the groove of the cart, and the bevel gear first is mounted on the outer surface of the two-way threaded rod, and a limit plate is provided on the adjacent side of the two sets of L-shaped fixing rods, and two sets of card slots are provided on the adjacent side of the two sets of limit plates, and electric telescopic rods are provided inside the two sets of card slots of the two sets of limit plates, and the output ends of the four sets of electric telescopic rods are provided with limit blocks.

[0010] Furthermore, the U-shaped fixing plate is located just above the bevel gear 2 and the bevel gear 1.

[0011] Furthermore, a protective cover is snap-connected to the outer surface of the storage box, and slots are provided on both the front and rear sides of the protective cover.

[0012] Furthermore, the lubrication assembly includes a T-shaped fixing plate, which is installed on the upper surface of the cart, an oil pump is provided on the upper surface of the T-shaped fixing plate, a connecting pipe 1 is provided at the feed end of the oil pump, the feed end of the connecting pipe 1 passes through the upper surface of the storage box and is installed inside the storage box, a connecting pipe 2 is provided at the guide end of the oil pump, a connecting plate is provided on the side of the T-shaped fixing plate away from the protective cover, a side plate is installed on the side of the connecting plate away from the T-shaped fixing plate, a side plate is provided on the upper surface of the side plate, and a side plate is provided on the side of the side plate away from the connecting plate A groove is provided, and through holes are provided on the bottom and top of the inner wall of the side plate groove. Screws are rotatably connected inside the two groups of through holes of the side plate. The output shaft of the motor is installed on the upper surface of the screw. The external thread of the screw is connected to a slider. The sliding path of the slider is inside the groove of the side plate. A sponge is provided on the side of the slider away from the side plate. A through hole is provided on the upper surface of the slider. The end of the connecting pipe 2 away from the oil pump is installed in the through hole of the slider. The side of the guiding end of the connecting pipe 2 away from the protective cover is attached to the side of the sponge close to the protective cover.

[0013] The top of the inner wall of the two groups of L-shaped limiting blocks is respectively abutted against the upper surfaces of the two groups of support plates, and the lower surfaces of the two groups of U-shaped positioning plates are provided with through holes, and the support plates are rotatably connected inside the through holes of the two groups of

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model drives the bevel gear 2 and the bevel gear 1 to trigger the L-shaped fixing rod to rotate by rotating the handle, so that the L-shaped fixing rod drives the two sets of limit plates to move during the rotation, so that the adjacent sides of the two sets of limit plates are respectively abutted against the left and right sides of the storage box, and then the four sets of electric telescopic rods are activated to drive the four sets of limit blocks to move, so that the four sets of limit blocks are respectively abutted against the front and rear sides of the storage box, so that the positioning mechanism limits the front, back, left and right movement of the storage box on the upper end of the trolley, thereby minimizing the movement of the storage box on the upper end of the trolley when the subsequent staff pulls the trolley, thereby improving the stability of the device during the subsequent movement of the upper end on the ground.

[0016] 2. The utility model starts the oil pump to guide the lubricating oil in the storage box along the connecting pipe 1 and the connecting pipe 2 to the inside of the sponge, and then adjusts the position of the mobile sponge by starting the motor, and moves the sponge to abut against one side of the maintenance equipment. By pushing the cart, the lubricating oil accumulated in the sponge after being squeezed adheres to the outer surface of the maintenance equipment, thereby minimizing the lubricating oil from dripping to the ground during the subsequent lubrication of the maintenance equipment by the device, resulting in excessive waste of lubricating oil during the lubrication of the maintenance equipment by the device, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the top surface structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the front structure of the utility model;

[0019] Figure 3 This is a side structural diagram of the limit plate of the utility model;

[0020] Figure 4 This utility model Figure 1 Enlarged view of point A in the middle.

[0021] Figure numerals: 1. cart; 2. storage box; 3. positioning mechanism; 301. bidirectional threaded rod; 302. L-shaped fixing rod; 303. bevel gear 1; 304. U-shaped fixing plate; 305. handle; 306. limit plate; 307. limit block; 308. bevel gear 2; 309. electric telescopic rod; 4. protective cover; 5. lubrication assembly; 501. T-shaped fixing plate; 502. connecting pipe 1; 503. oil pump; 504. connecting plate; 505. connecting pipe 2; 506. side plate; 507. screw; 508. motor; 509. slider; 510. sponge; 6. supporting mechanism; 601. universal wheel; 602. supporting plate; 603. U-shaped positioning plate; 604. hydraulic cylinder; 605. fixing block; 606. L-shaped limit block; 607. U-shaped clamping block. DETAILED DESCRIPTION

[0022] 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 some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings. In addition, the terms "first," "second," etc. are used only to distinguish the descriptions and are not to be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the present invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the present invention.

[0026] like Figures 1 to 4 As shown, a self-lubricating device for repairing large-scale mining equipment includes a cart 1, a storage box 2 is placed on the upper surface of the cart 1, a groove is opened on the upper surface of the cart 1, a positioning mechanism 3 is arranged inside the groove of the cart 1 to limit the moving range of the storage box 2 at the upper end of the cart 1, a lubrication component 5 is arranged on the upper surface of the cart 1, and a supporting mechanism 6 is installed on the front and rear sides of the cart 1; specifically, by adjusting and starting the positioning mechanism 3, the inner wall of the positioning mechanism 3 is respectively abutted against the front, back, left and right sides of the storage box 2, so that the positioning mechanism 3 limits the front, back, left and right moving position of the storage box 2 at the upper end of the cart 1, thereby avoiding as much as possible the movement of the storage box 2 at the upper end of the cart 1 when the subsequent staff pulls the cart 1, thereby improving the practicality of the device.

[0027] like Figures 1 to 3As shown, the positioning mechanism includes a bidirectional threaded rod 301 and a U-shaped fixing plate 304. The U-shaped fixing plate 304 is mounted on the upper surface of the cart 1. A through hole is provided on the upper surface of the U-shaped fixing plate 304. A handle 305 is rotatably connected to the through hole of the U-shaped fixing plate 304. A bevel gear 2 308 is provided on the lower surface of the handle 305. The external teeth of the bevel gear 2 308 are meshed with the bevel gear 1 303. Through holes are provided on the inner walls of the left and right sides of the groove of the cart 1. The bidirectional threaded rod 301 is rotatably connected to the two sets of through holes of the cart 1. The external threads of the bidirectional threaded rod 301 are connected with two groups of L-shaped fixing rods 302. The two groups of L-shaped fixing rods 302 are slidably connected to the grooves of the cart 1. The bevel gear 1 303 is installed on the outer surface of the bidirectional threaded rod 301. The adjacent sides of the two groups of L-shaped fixing rods 302 are provided with limit plates 306. The adjacent sides of the two groups of limit plates 306 are provided with two groups of slots. The two groups of limit plates 306 are provided with electric telescopic rods 309 inside the two groups of slots. The output ends of the four groups of electric telescopic rods 309 are all installed with limit blocks 307.

[0028] Specifically, when the storage box 2 is placed on the upper surface of the cart 1, the handle 305 is turned to drive the bevel gear 2 308 and the bevel gear 1 303 to trigger the L-shaped fixing rod 302 to rotate, so that the L-shaped fixing rod 302 drives the two sets of limit plates 306 to move during the rotation, and the adjacent sides of the two sets of limit plates 306 are respectively abutted against the left and right sides of the storage box 2, and then the four sets of electric telescopic rods 309 are started to drive the four sets of limit blocks 307 to move, and the four sets of limit blocks 307 are respectively abutted against the front and back sides of the storage box 2, so that the positioning mechanism 3 limits the front, back, left and right movement of the storage box 2 at the upper end of the cart 1, thereby minimizing the movement of the storage box 2 at the upper end of the cart 1 when the subsequent staff pulls the cart 1, thereby improving the stability of the device during the subsequent movement on the ground.

[0029] like Figure 1 and Figure 2 As shown, the U-shaped fixing plate 304 is located at the upper end of the bevel gear 2 308 and the bevel gear 1 303; specifically, by the position of the U-shaped fixing plate 304 being located at the upper end of the bevel gear 2 308 and the bevel gear 1 303, the U-shaped fixing plate 304 blocks the bevel gear 2 308 and the bevel gear 1 303, thereby minimizing the risk of subsequent staff members coming into contact with the bevel gear 2 308 and the bevel gear 1 303 during the process of turning the handle 305, thereby preventing the staff members from being injured. Therefore, the safety of the device during use is improved.

[0030] like Figure 1 and Figure 2As shown, the outer surface of the storage box 2 is snapped with a protective cover 4, and slots are provided on the front and rear sides of the protective cover 4; specifically, the protective cover 4 is positioned at the outer end of the storage box 2 so that the protective cover 4 wraps the storage box 2, thereby minimizing the damage to the storage box 2 caused by collision during subsequent movement and use, thereby improving the service life of the storage box 2; the protective cover 4 is provided with slots on the front and rear sides so that subsequent staff can check the lubricating oil reserves inside the storage box 2 through the slots of the protective cover 4, thereby eliminating the need for subsequent staff to use professional tools when checking the lubricating oil reserves in the protective cover 4, thereby shortening the time spent by subsequent staff in checking the lubricating oil reserves inside the storage box 2.

[0031] like Figure 1 and Figure 2 As shown, the lubrication assembly 5 includes a T-shaped fixing plate 501, which is installed on the upper surface of the cart 1. An oil pump 503 is provided on the upper surface of the T-shaped fixing plate 501. A connecting pipe 1 502 is provided at the feed end of the oil pump 503. The feed end of the connecting pipe 1 502 passes through the upper surface of the storage box 2 and is installed inside the storage box 2. A connecting pipe 2 505 is provided at the guide end of the oil pump 503. A connecting plate 504 is provided on the side of the T-shaped fixing plate 501 away from the protective cover 4. A side plate 506 is installed on the side of the connecting plate 504 away from the T-shaped fixing plate 501. The upper surface of the side plate 506 is provided with a side plate 506. The side plate 506 is away from the connecting plate 504. A groove is provided on the side, and through holes are provided on the bottom and top of the inner wall of the groove of the side plate 506. Screws 507 are rotatably connected inside the two groups of through holes of the side plate 506. The output shaft of the motor 508 is installed on the upper surface of the screw 507. The external thread of the screw 507 is connected to a slider 509. The sliding path of the slider 509 is inside the groove of the side plate 506. A sponge 510 is provided on the side of the slider 509 away from the side plate 506. A through hole is provided on the upper surface of the slider 509. One end of the connecting pipe 2 505 away from the oil pump 503 is installed inside the through hole of the slider 509. The side of the guiding end of the connecting pipe 2 505 away from the protective cover 4 is attached to the side of the sponge 510 close to the protective cover 4;

[0032] Specifically, by starting the oil pump 503, the lubricating oil inside the storage box 2 is guided along the connecting pipe 1 502 and the connecting pipe 2 505 to the inside of the sponge 510, and then the position of the mobile sponge 510 is adjusted by starting the motor 508, and the position of the sponge 510 is adjusted to move it to abut against one side of the maintenance equipment, and by pushing the cart 1, the lubricating oil accumulated inside the sponge 510 after being squeezed adheres to the outer surface of the maintenance equipment, thereby minimizing the lubricating oil from dripping to the ground during the subsequent lubrication of the maintenance equipment by the device, resulting in excessive waste of lubricating oil during the lubrication of the maintenance equipment by the device, thereby improving the practicality of the device.

[0033] like Figure 2 and Figure 4 As shown, the two groups of support mechanisms 6 include U-shaped positioning plates 603, and the two groups of U-shaped positioning plates 603 are respectively installed on the front and rear sides of the cart 1. The inner walls of the two groups of U-shaped positioning plates 603 are provided with through holes, and the through holes of the two groups of U-shaped positioning plates 603 are rotatably connected to the support plates 602. The lower surfaces of the two groups of support plates 602 are provided with universal wheels 601, and the lower surfaces of the two groups of universal wheels 601 are kept parallel to the lower surface of the cart 1. The upper surfaces of the two groups of U-shaped positioning plates 603 are provided with grooves, and the grooves of the two groups of U-shaped positioning plates 603 are adjacent. A hydraulic cylinder 604 is installed on one side, and a fixed block 605 is installed on the output end of the two groups of hydraulic cylinders 604. The upper surface of the two groups of fixed blocks 605 is provided with a slot, and the inside of the slots of the two groups of fixed blocks 605 is slidably connected with an L-shaped limit block 606. The top of the inner wall of the two groups of L-shaped limit blocks 606 respectively abuts against the upper surface of the two groups of support plates 602. The lower surface of the two groups of support plates 602 is provided with a U-shaped block 607. The position of the internal groove of the two groups of U-shaped blocks 607 is located on the moving path of the two groups of L-shaped limit blocks 606;

[0034] Specifically, by keeping the lower surfaces of the two sets of universal wheels 601 parallel to the lower surface of the cart 1, the two sets of universal wheels 601 can support the front and rear sides of the cart 1 during use, thereby minimizing the tilting of the cart 1 to the front and rear sides during use, which may cause the cart 1 to overturn, thereby improving the safety of the device during use; by pushing the two sets of L-shaped limit blocks 606, the top of the inner walls of the two sets of L-shaped limit blocks 606 are abutted against the upper surfaces of the two sets of support plates 602, so that the two sets of L-shaped limit blocks 606 can limit the rotation position of the two sets of support plates 602 inside the two sets of U-shaped positioning plates 603, thereby minimizing the collision of the subsequent universal wheels 601 with the two sets of support plates 602 during use, thereby improving the stability of the two sets of support plates 602 during use.

[0035] At the same time, by rotating the two groups of support plates 602, the two groups of U-shaped blocks 607 are driven to move, and the positions of the two groups of U-shaped blocks 607 are adjusted to a position where the upper ends of the two groups of support plates 602 are perpendicular to each other, and then by starting the two groups of hydraulic cylinders 604, the two groups of fixed blocks 605 and the two groups of L-shaped limit blocks 606 are driven to move, and the positions of the two groups of L-shaped limit blocks 606 are adjusted to a position where the two groups of U-shaped limit blocks 607 are parallel, and by pushing the two groups of L-shaped limit blocks 606, the two groups of L-shaped limit blocks 606 are clamped inside the two groups of U-shaped block 607, so that the subsequent two groups of L-shaped limit blocks 606 and the two groups of U-shaped block 607 limit the position of the two groups of support plates 602 after rotation, thereby trying to avoid the subsequent two groups of support mechanisms 6 from being unfolded after folding and storing.

[0036] In summary, by rotating the handle 305, the bevel gear 2 308 and the bevel gear 1 303 are driven to trigger the L-shaped fixing rod 302 to rotate, so that the L-shaped fixing rod 302 drives the two sets of limit plates 306 to move during the rotation, and the adjacent sides of the two sets of limit plates 306 are respectively abutted against the left and right sides of the storage box 2, and then the four sets of electric telescopic rods 309 are started to drive the four sets of limit blocks 307 to move, and the four sets of limit blocks 307 are respectively abutted against the front and back sides of the storage box 2, so that the positioning mechanism 3 limits the front, back, left and right movement of the storage box 2 on the upper end of the cart 1, thereby avoiding as much as possible the subsequent staff from storing in the process of pulling the cart 1. The box 2 moves at the upper end of the cart 1; by starting the oil pump 503, the lubricating oil inside the storage box 2 is guided along the connecting pipe 1 502 and the connecting pipe 2 505 to the inside of the sponge 510, and then the position of the moving sponge 510 is adjusted by starting the motor 508, and the position of the sponge 510 is adjusted and moved to abut against one side of the maintenance equipment, and by pushing the cart 1, the lubricating oil accumulated inside the sponge 510 after being squeezed adheres to the outer surface of the maintenance equipment, thereby minimizing the lubricating oil from dripping to the ground during the subsequent lubrication of the maintenance equipment by the device, resulting in excessive waste of lubricating oil during the lubrication of the maintenance equipment by the device.

[0037] At the same time, by keeping the lower surfaces of the two sets of universal wheels 601 parallel to the lower surface of the cart 1, the two sets of universal wheels 601 can support the front and rear sides of the cart 1 during use, thereby minimizing the cart 1 from tilting to the front and rear sides during use and causing the cart 1 to overturn; by pushing the two sets of L-shaped limit blocks 606, the top of the inner walls of the two sets of L-shaped limit blocks 606 are abutted against the upper surfaces of the two sets of support plates 602, so that the two sets of L-shaped limit blocks 606 can limit the rotation position of the two sets of support plates 602 inside the two sets of U-shaped positioning plates 603, thereby minimizing the rotation of the universal wheels 601 from hitting the two sets of support plates 602 during use.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions merely illustrate the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed for the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating device for maintenance of large-scale mining equipment, comprising a cart (1), characterized in that; A storage box (2) is placed on the upper surface of the cart (1), a groove is provided on the upper surface of the cart (1), a positioning mechanism (3) is provided inside the groove of the cart (1) for limiting the range of movement of the storage box (2) at the upper end of the cart (1), a lubrication component (5) is provided on the upper surface of the cart (1), and support mechanisms (6) are installed on both the front and rear sides of the cart (1); The outer surface of the storage box (2) is connected to a protective cover (4), and the front and rear sides of the protective cover (4) are provided with a card slot. The lubrication component (5) includes a T-shaped fixing plate (501), and the T-shaped fixing plate (501) is installed on the upper surface of the cart (1). The upper surface of the T-shaped fixing plate (501) is provided with an oil pump (503), and the feed end of the oil pump (503) is provided with a connecting pipe (502). The feed end of the connecting pipe (502) is provided with a connecting pipe (502). The material end passes through the upper surface of the storage box (2) and is installed inside the storage box (2). The material guide end of the oil pump (503) is provided with a connecting pipe 2 (505). A connecting plate (504) is provided on the side of the T-shaped fixing plate (501) away from the protective cover (4). A side plate (506) is installed on the side of the connecting plate (504) away from the T-shaped fixing plate (501). A motor (508) is provided on the upper surface of the side plate (506). The side plate (506) is provided with a groove on the side away from the connecting plate (504), and the bottom and top of the inner wall of the groove of the side plate (506) are provided with through holes. The two groups of through holes of the side plate (506) are rotatably connected with screws (507). The output shaft of the motor (508) is installed on the upper surface of the screw (507). The external thread of the screw (507) is connected with a slider (509). The sliding path of the slider (509) is inside the groove of the side plate (506). A sponge (510) is provided on the side of the slider (509) away from the side plate (506). The upper surface of the slider (509) is provided with a through hole. The end of the connecting pipe 2 (505) away from the oil pump (503) is installed inside the through hole of the slider (509), and the side of the guide end of the connecting pipe 2 (505) away from the protective cover (4) is attached to the side of the sponge (510) close to the protective cover (4).

2. A self-lubricating device for maintenance of large-scale mining equipment according to claim 1, characterized in that: The positioning mechanism (3) includes a bidirectional threaded rod (301) and a U-shaped fixing plate (304), wherein the U-shaped fixing plate (304) is mounted on the upper surface of the cart (1), and a through hole is provided on the upper surface of the U-shaped fixing plate (304), wherein a handle (305) is rotatably connected to the through hole of the U-shaped fixing plate (304), and a bevel gear 2 (308) is provided on the lower surface of the handle (305), wherein the external teeth of the bevel gear 2 (308) are meshedly connected to the bevel gear 1 (303), and through holes are provided on the inner walls of the left and right sides of the groove of the cart (1), and the bidirectional threaded rod (301) is rotatably connected to the two sets of through holes of the cart (1). Internally, the external threads of the bidirectional threaded rod (301) are connected to two groups of L-shaped fixed rods (302), and the two groups of L-shaped fixed rods (302) are slidably connected to the inside of the groove of the cart (1). The bevel gear (303) is installed on the outer surface of the bidirectional threaded rod (301). A limit plate (306) is provided on the adjacent side of the two groups of L-shaped fixed rods (302). Two groups of slots are opened on the adjacent side of the two groups of limit plates (306). Electric telescopic rods (309) are provided inside the two groups of slots of the two groups of limit plates (306). The output ends of the four groups of electric telescopic rods (309) are all installed with limit blocks (307).

3. A self-lubricating device for maintenance of large-scale mining equipment according to claim 2, characterized in that: The U-shaped fixing plate (304) is located directly above the bevel gear 2 (308) and the bevel gear 1 (303).

4. A self-lubricating device for maintenance of large-scale mining equipment according to claim 1, characterized in that: The two groups of support mechanisms (6) each include a U-shaped positioning plate (603), and the two groups of U-shaped positioning plates (603) are respectively installed on the front and rear sides of the cart (1), and the inner walls of the two groups of U-shaped positioning plates (603) are provided with through holes, and the through holes of the two groups of U-shaped positioning plates (603) are rotatably connected to the support plates (602), and the lower surfaces of the two groups of support plates (602) are provided with universal wheels (601), and the lower surfaces of the two groups of universal wheels (601) are kept parallel to the lower surface of the cart (1), and the upper surfaces of the two groups of U-shaped positioning plates (603) are provided with grooves, and the grooves of the two groups of U-shaped positioning plates (603) are parallel to each other. A hydraulic cylinder (604) is installed on each adjacent side, and a fixed block (605) is installed on the output end of each of the two groups of hydraulic cylinders (604). A card slot is provided on the upper surface of each of the two groups of fixed blocks (605). L-shaped limit blocks (606) are slidably connected inside the card slots of each of the two groups of fixed blocks (605). The tops of the inner walls of the two groups of L-shaped limit blocks (606) are respectively in contact with the upper surfaces of the two groups of support plates (602). U-shaped card blocks (607) are provided on the lower surfaces of the two groups of support plates (602). The positions of the internal grooves of the two groups of U-shaped card blocks (607) are respectively located on the moving paths of the two groups of L-shaped limit blocks (606).

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