Novel wear-resistant device for movable support of upper frame of lifting appliance

Abstract

The utility model relates to the technical field of lifting appliance upper frames, in particular to a novel anti-wear device for a movable support of a lifting appliance upper frame, which comprises two mounting plates, a fixing plate and a bracket are arranged between the two mounting plates from top to bottom, two sides of the fixing plate are respectively and fixedly connected with corresponding mounting plates, and two sides of the bracket are respectively and fixedly connected with corresponding mounting plates. The electric push rod structure comprises a box body and a push rod, a first through groove is formed in the bottom of the box body, a shifting fork is arranged at the bottom of the push rod, the lower end of the shifting fork penetrates through the first through groove and is connected with the bracket, and an upper wear-resistant part is arranged between the top of the box body and the bottom of the fixing plate. A lower wear-resistant part is arranged between the bottom of the box body and the top of the bracket; and side wear-resistant parts are respectively arranged between two side parts of the box body and the corresponding mounting plates. The utility model has the following beneficial effects: the upper wear-resisting plate and the lower wear-resisting plate are quickly disassembled and assembled, and the replacement efficiency of the wear-resisting plates is improved; lubricating oil can be conveniently added between the wear-resisting plate and the box body, and the friction coefficient is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of upper frames of lifting appliances, in particular to an anti-wear device for a movable support of a new type of upper frame of a lifting appliance. Background Art

[0002] The movable support of the eight-rope lifting appliance upper frame of the container yard gantry crane is a very crucial component on the upper frame of the lifting appliance. The translation and slewing functions of the container lifting appliance need to be realized by the electric push rod pushing the movable support. Since there is always relative movement between the movable support and the electric push rod, reducing the friction coefficient between the two can significantly improve the service life of the electric push rod and the movable support. Therefore, in the prior art, a lower wear-resistant block is often fixed in the groove in the middle of the top surface of the bracket, and side wear-resistant blocks are arranged on both sides of the electric push rod to assist the lower wear-resistant block in working.

[0003] However, since the wear-resistant block is a consumable part, and the groove at the top of the bracket is a closed groove, installing the lower wear-resistant block in the closed groove will cause extremely inconvenient influence on the replacement of the lower wear-resistant block. In this way, if the lower wear-resistant block is severely worn, the entire bracket needs to be removed from the movable support to replace the lower wear-resistant block, and the operation is extremely inconvenient; secondly, there is no effective lubrication structure between the lower wear-resistant block and the electric push rod, which further reduces the service life of the lower wear-resistant block; at the same time, in the prior art, there is no effective anti-wear structure at the top of the electric push rod. In this way, when the upper frame of the lifting appliance is in a slack rope state, the movable support is in a free state accordingly. At this time, the upper part of the movable support contacts the top of the box body of the electric push rod. If the driver operates the translation of the lifting appliance at this moment, it is easy to cause wear between the box body of the electric push rod and the movable support.

[0004] Therefore, the utility model optimizes and improves according to the problems of inconvenient disassembly and assembly of the lower wear-resistant block and poor anti-wear effect in the prior art, and specially proposes a new type of anti-wear device for the movable support of the upper frame of the lifting appliance to better solve the problems in the prior art. Content of the Utility Model

[0005] To solve one of the above technical problems, the technical solution adopted by the present utility model is: a wear-resistant device for the moving support of the upper frame of a new type of lifting tool, which includes two mounting plates arranged at intervals. Inside the space between the two mounting plates, a fixed plate and a bracket are arranged at intervals from top to bottom. Two sides of the fixed plate are respectively fixedly connected to the corresponding mounting plates, and two sides of the bracket are respectively fixedly connected to the corresponding mounting plates. The fixed plate, the bracket and the two mounting plates jointly enclose a channel for the electric push rod structure to pass through. The electric push rod structure includes a box body and a push rod arranged inside along the length direction of the box body. A first through groove is opened at the bottom of the box body along its length direction. A fork is fixedly arranged at the bottom of the push rod. The lower end of the fork passes through the first through groove and is connected to the bracket. An upper wear-resistant part is arranged between the top of the box body and the bottom of the fixed plate, a lower wear-resistant part is arranged between the bottom of the box body and the top of the bracket, and side wear-resistant parts are respectively arranged between the two sides of the box body and the corresponding mounting plates.

[0006] In any of the above solutions, preferably, the bracket includes a support plate. The lower wear-resistant part is arranged on the top of the support plate. A second through groove is opened in the middle of the support plate along its length direction. Connecting plates are respectively arranged on both sides of the second through groove. The upper ends of the two connecting plates are fixedly connected to the bottom of the support plate at intervals. Two through holes are respectively and spacedly opened on each connecting plate. Through holes are respectively opened at the corresponding positions of the two mounting plates. It also includes two first pin shafts, and the two first pin shafts respectively pass through the corresponding through holes on the two mounting plates and the two connecting plates in sequence. The lower end of the fork passes through the second through groove and extends between the two first pin shafts.

[0007] In any of the above solutions, preferably, the lower wear-resistant part includes a lower wear-resistant plate. A clamping groove is opened at the top of the support plate along its length direction. The lower wear-resistant plate is cooperatively arranged in the clamping groove. The top of the lower wear-resistant plate presses against the bottom of the box body. A third through groove is opened in the middle of the lower wear-resistant plate along its length direction. The fork passes through the third through groove. Lower stop blocks are respectively arranged at both ends of the lower wear-resistant plate. The lower ends of the lower stop blocks are respectively fixedly connected to the corresponding ends of the support plate, and the upper ends of the lower stop blocks respectively press against the corresponding ends of the lower wear-resistant plate.

[0008] In any of the above solutions, preferably, a lower oil injection nozzle is fixedly arranged in the middle of the lower end of the connecting plate. A first lower oil injection groove is vertically opened in the middle of the connecting plate. A second lower oil injection groove is opened at the corresponding position of the support plate. A third lower oil injection groove is opened at the corresponding position of the lower wear-resistant plate. The lower oil injection nozzle, the first lower oil injection groove, the second lower oil injection groove and the third lower oil injection groove are sequentially communicated.

[0009] Preferably, in any of the above solutions, the upper wear-resistant member includes an upper wear-resistant plate. The bottom of the upper wear-resistant plate presses against the top of the box body, and the top of the upper wear-resistant plate presses against the bottom of the fixing plate. Upper stop blocks are respectively arranged at both ends of the upper wear-resistant plate, and the upper ends of the upper stop blocks are respectively fixedly connected to the corresponding ends of the fixing plate, and the lower ends of the upper stop blocks respectively press against the corresponding ends of the upper wear-resistant plate.

[0010] Preferably, in any of the above solutions, a plurality of upper oil injection nozzles are fixedly arranged at intervals on the top of the fixing plate. First upper oil injection grooves are respectively opened at corresponding positions of the fixing plate, and second upper oil injection grooves are respectively opened at corresponding positions of the upper wear-resistant plate. The corresponding upper oil injection nozzles, the first upper oil injection grooves and the second upper oil injection grooves are communicated in sequence.

[0011] Preferably, in any of the above solutions, the side wear-resistant member includes a side wear-resistant plate. One side of the side wear-resistant plate presses against the mounting plate, and the other side of the side wear-resistant plate presses against the vertical side wall of the box body. A side oil injection nozzle is fixedly arranged on the outer wall of the mounting plate. A first side oil injection groove is opened at the corresponding position of the mounting plate, and a second side oil injection groove is opened at the corresponding position of the side wear-resistant plate. The side oil injection nozzle, the first side oil injection groove and the second side oil injection groove are communicated in sequence.

[0012] Preferably, in any of the above solutions, two ear plates are respectively fixedly connected at intervals on both sides of the bottom surface of the support plate. Through holes are opened on each of the ear plates. A plurality of through holes are opened at intervals at the corresponding positions of the mounting plate. Two second pin shafts are also included, and the two second pin shafts respectively penetrate through the two mounting plates and the corresponding through holes on the two ear plates in sequence.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. By reasonably designing the bracket structure, the present utility model designs the groove for installing the lower wear-resistant plate at the top of the bracket into an open-type clamping groove, and at the same time, the lower wear-resistant block is fixedly positioned by the lower stop blocks at both ends thereof, so as to prevent the lower wear-resistant plate from disengaging from the bracket due to the movement of the moving support. In this way, when replacing the lower wear-resistant plate, only the head bolt with a hole for fixing the lower stop block needs to be loosened, and the lower wear-resistant plate can be directly pulled out, and there is no need to disassemble the whole bracket, which is more time-saving and labor-saving from the perspective of maintenance.

[0015] 2. The lower wear-resistant plate of the present utility model is designed with an oil injection groove, so that lubricating oil can be added between the lower wear-resistant plate and the box body of the electric push rod through the lower oil injection nozzle, thereby reducing the friction coefficient between the two and improving the service life of the lower wear-resistant block.

[0016] 3. The utility model adds an upper wear-resistant plate on the top of the box body of the electric push rod, and at the same time sets an upper oil injection nozzle to add lubricating oil between the upper wear-resistant plate and the box body, so as to further ensure that the box body structure of the electric push rod will not be damaged. At the same time, the upper wear-resistant plate is fixed and positioned by two upper stop blocks. In this way, only by disassembling and assembling the upper stop blocks, the rapid and convenient assembly process of the upper wear-resistant plate can be realized, greatly improving the maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the specific embodiments of the present utility model, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, similar elements or components are generally identified by similar reference numerals. In the drawings, the elements or components are not necessarily drawn to scale.

[0018] Figure 1 It is a partial cross-sectional view of the wear-resistant device of the present utility model in the front view direction.

[0019] Figure 2 It is a partial cross-sectional view of the wear-resistant device of the present utility model in the side view direction.

[0020] Figure 3 It is a partial connection cross-sectional view of the first rotating shaft of the present utility model in the side view direction.

[0021] Figure 4 It is a cross-sectional view of the bracket of the present utility model in the front view direction.

[0022] Figure 5 It is a cross-sectional view of the bracket of the present utility model in the side view direction.

[0023] Figure 6 It is a top view of the lower wear-resistant plate of the present utility model.

[0024] In the figure, 1. mounting plate; 2. fixing plate; 3. channel; 4. box body; 5. push rod; 6. first through groove; 7. fork; 8. support plate; 9. second through groove; 10. connecting plate; 11. first pin shaft; 12. lower wear-resistant plate; 13. clamping groove; 14. third through groove; 15. lower stop block; 16. lower oil injection nozzle; 17. first lower oil injection groove; 18. second lower oil injection groove; 19. third lower oil injection groove; 20. upper wear-resistant plate; 21. upper oil injection nozzle; 22. first upper oil injection groove; 23. second upper oil injection groove; 24. side wear-resistant plate; 25. side oil injection nozzle; 26. first side oil injection groove; 27. second side oil injection groove; 28. ear plate; 29. second pin shaft; 30. upper stop block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following is a detailed description of the embodiments of the technical solution of the utility model in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the scope of protection of the utility model. Figures 1-6 as shown in .

[0026] A new type of anti-wear device for a movable support on a hanger, comprising two installation plates 1 arranged at intervals, a fixed plate 2 and a bracket are arranged at intervals from top to bottom in the space between the two installation plates 1, the two side portions of the fixed plate 2 are respectively fixedly connected to the corresponding installation plates 1, the two side portions of the bracket are respectively fixedly connected to the corresponding installation plates 1, the fixed plate 2, the bracket and the two installation plates 1 together form a channel 3 through which an electric push rod structure passes, the electric push rod structure comprises a box body 4 and a push rod 5 arranged inside the box body 4 along the length direction, a first through groove 6 is opened at the bottom of the box body 4 along the length direction, a shift fork 7 is fixedly provided at the bottom of the push rod 5, the lower end of the shift fork 7 passes through the first through groove 6 and is connected to the bracket, an upper wear-resistant part is provided between the top of the box body 4 and the bottom of the fixed plate 2, a lower wear-resistant part is provided between the bottom of the box body 4 and the top of the bracket, and side wear-resistant parts are respectively provided between the two side portions of the box body 4 and the installation plates 1 at corresponding positions.

[0027] The two mounting plates 1, the fixed plate 2 and the bracket are an integral structure. The push rod 5 drives the shift fork 7 to move along the first through groove 6, and then the shift fork 7 shifts the bracket to achieve the translation of the mobile support along the length direction of the box body 4. In order to reduce the wear between the mobile support and the box body 4 and improve the service life of the mobile support, corresponding wear-resistant structures are respectively provided on each inner wall of the channel 3, so as to wrap the box body 4, thereby improving the wear resistance of the mobile support. At the same time, the upper and lower wear-resistant parts of the utility model can be directly pulled out from the installation gap without disassembling the overall structure of the mobile support, which can greatly improve the convenience of replacing and repairing the wear-resistant parts.

[0028] A plurality of reinforcing plates are fixedly connected at intervals on the top of the fixed plate 2, and both ends of each reinforcing plate are fixedly connected to the inner wall of the corresponding mounting plate 1. By fixing the reinforcing plates, the connection strength of the movable support can be greatly improved.

[0029] Preferably, in any of the above solutions, the bracket includes a support plate 8, the lower wear-resistant member is disposed on the top of the support plate 8, a second through groove 9 is formed in the middle of the support plate 8 along its length direction, connecting plates 10 are respectively disposed on both sides of the second through groove 9, the upper ends of the two connecting plates 10 are fixedly connected to the bottom of the support plate 8 at intervals, two through holes are respectively formed in each of the connecting plates 10 at intervals, through holes are respectively formed at corresponding positions of each mounting plate 1, and further includes two first pin shafts 11, the two first pin shafts 11 respectively penetrate through the corresponding through holes on the two mounting plates 1 and the two connecting plates 10 in sequence, and the lower end of the fork 7 penetrates through the second through groove 9 and extends between the two first pin shafts 11.

[0030] One end of the first pin shaft 11 abuts against the outer wall of the corresponding mounting plate 1, and the other end is fastened by a slotted nut of M30×3.5 and a matching washer and split pin, so as to realize the installation and positioning of the bracket. The fork 7 passes through the second through groove 9 and extends between the two connecting plates 10 and the two first pin shafts 11. The fork 7 is driven to move by the push rod 5, and then through the cooperation of the fork 7 with the connecting plates 10 and the first pin shafts 11, the overall structure of the movable support is finally realized to move along the box body 4.

[0031] Preferably, in any of the above solutions, the lower wear-resistant member includes a lower wear-resistant plate 12, a clamping groove 13 is formed in the top of the support plate 8 along its length direction, the lower wear-resistant plate 12 is cooperatively disposed in the clamping groove 13, the top of the lower wear-resistant plate 12 abuts against the bottom of the box body 4, a third through groove 14 is formed in the middle of the lower wear-resistant plate 12 along its length direction, the fork 7 penetrates through the third through groove 14, lower stop blocks 15 are respectively disposed at both ends of the lower wear-resistant plate 12, the lower ends of the lower stop blocks 15 are respectively fixedly connected to the corresponding ends of the support plate 8, and the upper ends of the lower stop blocks 15 respectively abut against the corresponding ends of the lower wear-resistant plate 12.

[0032] The clamping groove 13 is arranged through the entire top of the support plate 8. While the lower wear-resistant plate 12 is clamped in the clamping groove 13, it can be drawn out from its end along the length direction of the clamping groove 13, which can improve the assembly speed of the lower wear-resistant plate 12, improve the replacement and maintenance efficiency, and avoid repeatedly disassembling and assembling the bracket structure. In order to ensure the stable setting of the lower wear-resistant plate 12 when the movable support works, lower stop blocks 15 are respectively arranged at both ends thereof. The bottom of the lower stop blocks 15 is fixedly installed on the corresponding ends of the support plate 8 through a number of M8×40 bolts and matching washers, and the top thereof abuts against the ends of the lower wear-resistant plate 12, so as to realize the stop and fixation of the lower wear-resistant plate 12.

[0033] Preferably, in any of the above solutions, a lower oil injection nozzle 16 is fixedly provided in the middle of the lower end of the connecting plate 10. A first lower oil injection groove 17 is vertically formed in the middle of the connecting plate 10. A second lower oil injection groove 18 is formed at the corresponding position of the support plate 8. A third lower oil injection groove 19 is formed at the corresponding position of the lower wear-resistant plate 12. The lower oil injection nozzle 16, the first lower oil injection groove 17, the second lower oil injection groove 18 and the third lower oil injection groove 19 are communicated in sequence.

[0034] The third lower oil injection groove 19 is arranged at the top of the lower wear-resistant plate 12 along the length direction thereof, and a through hole is formed in the middle thereof to communicate with the corresponding second lower oil injection groove 18 below. At the same time, the lower end of the second lower oil injection groove 18 is connected to the upper end of the first lower oil injection groove 17. In this way, the operator can inject oil into the first lower oil injection groove 17 through the lower oil injection nozzle 16, and then the oil liquid enters the third lower oil injection groove 19 through the second lower oil injection groove 18, so as to finally realize the lubrication effect between the lower wear-resistant plate 12 and the bottom of the box body 4.

[0035] Preferably, in any of the above solutions, the upper wear-resistant member includes an upper wear-resistant plate 20. The bottom of the upper wear-resistant plate 20 presses against the top of the box body 4, and the top of the upper wear-resistant plate 20 presses against the bottom of the fixing plate 2. Upper stop blocks 30 are respectively arranged at both ends of the upper wear-resistant plate 20. The upper ends of the upper stop blocks 30 are respectively fixedly connected to the corresponding ends of the fixing plate 2, and the lower ends of the upper stop blocks 30 respectively press against the corresponding ends of the upper wear-resistant plate 20.

[0036] The upper wear-resistant plate 20 can be drawn out from both sides of the movable support, which can also improve the assembly speed of the upper wear-resistant plate 20. At the same time, the upper wear-resistant plate 20 is stopped and positioned by the upper stop blocks 30.

[0037] Preferably, in any of the above solutions, a plurality of upper oil injection nozzles 21 are fixedly arranged at intervals on the top of the fixing plate 2. First upper oil injection grooves 22 are respectively formed at the corresponding positions of the fixing plate 2. Second upper oil injection grooves 23 are respectively formed at the corresponding positions of the upper wear-resistant plate 20. The corresponding upper oil injection nozzles 21, the first upper oil injection grooves 22 and the second upper oil injection grooves 23 are communicated in sequence.

[0038] Through the upper oil injection nozzles 21, lubricating oil liquid can be added into the first upper oil injection grooves 22, and then enter the second upper oil injection grooves 23, and finally lubricate the upper wear-resistant plate 20 and the top of the box body 4.

[0039] Preferably, in any of the above solutions, the side wear-resistant member includes a side wear-resistant plate 24. One side of the side wear-resistant plate 24 abuts against the mounting plate 1, and the other side of the side wear-resistant plate 24 abuts against the vertical side wall of the box body 4. A side oil injection nozzle 25 is fixedly provided on the outer wall of the mounting plate 1. A first side oil injection groove 26 is formed at a corresponding position of the mounting plate 1. A second side oil injection groove 27 is formed at a corresponding position of the side wear-resistant plate 24. The side oil injection nozzle 25, the first side oil injection groove 26, and the second side oil injection groove 27 are communicated in sequence.

[0040] The side wear-resistant plate 24 is fixedly installed at a corresponding position on the inner wall of the mounting plate 1 through several pairs of M6×16 slotted cheese head screws + bolt counterbores. Oil is injected into the first side oil injection groove 26 through the side oil injection nozzle 25, and then the oil is injected into the second side oil injection groove 27 through the first side oil injection groove 26, so as to lubricate the corresponding side walls of the side wear-resistant plate 24 and the box body 4.

[0041] Preferably, in any of the above solutions, two ear plates 28 are respectively and spacedly fixedly connected to both sides of the bottom surface of the support plate 8. Through holes are formed in each of the ear plates 28. A plurality of through holes are spacedly formed at corresponding positions of the mounting plate 1. The two second pin shafts 29 are also included. The two second pin shafts 29 respectively pass through the corresponding through holes on the two mounting plates 1 and the two ear plates 28 in sequence.

[0042] The two ear plates 28 respectively fit and abut against the inner walls of the corresponding mounting plates 1, so as to further position the bracket and prevent the bracket from shaking. One end of the second pin shaft 29 abuts against the outer wall of the corresponding mounting plate 1, and the other end is tightly fixed through an M42×4.5 slotted nut, with the cooperation of a washer and a split pin, so as to finally further install and fix the whole bracket.

[0043] Specific working principle:

[0044] The push rod 5 works to drive the fork 7 to move, and then through the connection of the bracket, the translation movement of the moving support along the box body 4 is realized. In order to reduce the wear between the moving support and the box body 4 and improve the service life of the moving support, wear-resistant members are provided on the inner walls of the channels 3 through which the box body 4 and the push rod 5 pass for the moving support.

[0045] Among them, the lower wear-resistant plate 12 is arranged between the box body 4 and the bracket, and at the same time, the lower wear-resistant plate 12 is limited by two lower stoppers 15 to prevent it from coming out of the moving support. When the lower wear-resistant plate 12 needs to be repaired or replaced, only the lower stoppers 15 need to be removed, and then the lower wear-resistant plate 12 can be conveniently and quickly pulled out from between the box body 4 and the bracket.

[0046] The upper wear-resistant plate 20 is arranged between the box body 4 and the fixing plate 2. Similarly, by means of the two upper stoppers 30, the upper wear-resistant plate 20 can be quickly withdrawn without disassembling the overall structure of the movable support.

[0047] Meanwhile, the lower wear-resistant plate 12 and the upper wear-resistant plate 20 can be lubricated by oil injection through the lower oil injection nozzle 16 and the upper oil injection nozzle 21 respectively, further improving the abrasion resistance of the movable support.

[0048] The foregoing has shown and described 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 by the above embodiments. The above embodiments and the description in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and all these changes and improvements fall within the scope of the present invention claimed.

[0049] Those parts not detailed in the present invention are well-known technologies to those skilled in the art.

Claims

1. A new type of anti-wear device for the movable support of the hanger, characterized by: The invention comprises two installation plates (1) arranged at intervals, a fixing plate (2) and a bracket are arranged at intervals from top to bottom in the space between the two installation plates (1), two side portions of the fixing plate (2) are respectively fixedly connected to the corresponding installation plates (1), and two side portions of the bracket are respectively fixedly connected to the corresponding installation plates (1), and the fixing plate (2), the bracket and the two installation plates (1) together form a channel (3) through which an electric push rod structure passes, and the electric push rod structure comprises a box body (4) and a plurality of holes (3) arranged inside the box body (4) along the length direction thereof. A push rod (5) is provided, a first through slot (6) is provided at the bottom of the box body (4) along its length direction, a shift fork (7) is fixedly provided at the bottom of the push rod (5), the lower end of the shift fork (7) passes through the first through slot (6) and is connected to the bracket, an upper wear-resistant part is provided between the top of the box body (4) and the bottom of the fixing plate (2), a lower wear-resistant part is provided between the bottom of the box body (4) and the top of the bracket, and side wear-resistant parts are respectively provided between the two sides of the box body (4) and the mounting plate (1) at corresponding positions.

2. According to claim 1, the novel anti-wear device for the movable support of the sling is characterized by: The bracket comprises a support plate (8), the lower wear-resistant member is arranged on the top of the support plate (8), a second through slot (9) is provided in the middle of the support plate (8) along its length direction, connecting plates (10) are provided on both sides of the second through slot (9), the upper ends of the two connecting plates (10) are fixedly connected to the bottom of the support plate (8) at intervals, two through holes are provided on each connecting plate (10) at intervals, through holes are provided at corresponding positions of each mounting plate (1), and two first pin shafts (11) are respectively passed through the corresponding through holes on the two mounting plates (1) and the two connecting plates (10), and the lower end of the shift fork (7) passes through the second through slot (9) and extends between the two first pin shafts (11).

3. According to claim 2, the novel anti-wear device for the movable support of the sling is characterized by: The lower wear-resistant part comprises a lower wear-resistant plate (12), a clamping groove (13) is provided at the top of the support plate (8) along the length direction thereof, the lower wear-resistant plate (12) is arranged in the clamping groove (13), the top of the lower wear-resistant plate (12) is pressed against the bottom of the box body (4), a third through groove (14) is provided at the middle of the lower wear-resistant plate (12) along the length direction thereof, the shift fork (7) passes through the third through groove (14), lower stop blocks (15) are respectively provided at both ends of the lower wear-resistant plate (12), the lower ends of the lower stop blocks (15) are respectively fixedly connected to the corresponding ends of the support plate (8), and the upper ends of the lower stop blocks (15) are respectively pressed against the corresponding ends of the lower wear-resistant plate (12).

4. The novel anti-wear device for the movable support of the sling according to claim 3 is characterized by: A lower oiling nozzle (16) is fixedly provided in the middle of the lower end of the connecting plate (10), a first lower oiling groove (17) is vertically opened in the middle of the connecting plate (10), a second lower oiling groove (18) is opened at a corresponding position of the supporting plate (8), and a third lower oiling groove (19) is opened at a corresponding position of the lower wear-resistant plate (12), and the lower oiling nozzle (16), the first lower oiling groove (17), the second lower oiling groove (18) and the third lower oiling groove (19) are sequentially connected.

5. The novel anti-wear device for the movable support of the sling according to claim 4 is characterized by: The upper wear-resistant part comprises an upper wear-resistant plate (20), the bottom of the upper wear-resistant plate (20) is pressed against the top of the box body (4), the top of the upper wear-resistant plate (20) is pressed against the bottom of the fixed plate (2), and upper stop blocks (30) are respectively provided at both ends of the upper wear-resistant plate (20), the upper end of each upper stop block (30) is respectively fixedly connected to the corresponding end of the fixed plate (2), and the lower end of each upper stop block (30) is respectively pressed against the corresponding end of the upper wear-resistant plate (20).

6. The novel anti-wear device for the movable support of the sling according to claim 5 is characterized by: A plurality of upper oil injection nozzles (21) are fixedly arranged at intervals on the top of the fixed plate (2), a first upper oil injection groove (22) is respectively opened at each corresponding position of the fixed plate (2), and a second upper oil injection groove (23) is respectively opened at each corresponding position of the upper wear-resistant plate (20), and the corresponding upper oil injection nozzles (21), the first upper oil injection groove (22) and the second upper oil injection groove (23) are sequentially connected.

7. The novel anti-wear device for the movable support of the sling according to claim 6 is characterized by: The side wear-resistant part comprises a side wear-resistant plate (24), one side of the side wear-resistant plate (24) is pressed against the mounting plate (1), and the other side of the side wear-resistant plate (24) is pressed against the vertical side wall of the box body (4), a side oiling nozzle (25) is fixedly provided on the outer wall of the mounting plate (1), a first side oiling groove (26) is provided at a corresponding position of the mounting plate (1), and a second side oiling groove (27) is provided at a corresponding position of the side wear-resistant plate (24), and the side oiling nozzle (25), the first side oiling groove (26) and the second side oiling groove (27) are sequentially connected.

8. The novel anti-wear device for the movable support of the sling according to claim 7 is characterized by: Two ear plates (28) are fixedly connected at intervals on both sides of the bottom surface of the support plate (8), each ear plate (28) is provided with a through hole, a plurality of through holes are provided at intervals at corresponding positions on the mounting plate (1), and two second pin shafts (29) are also provided, and the two second pin shafts (29) respectively penetrate the corresponding through holes on the two mounting plates (1) and the two ear plates (28) in sequence.

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