Underground hydraulic lifting beam chain anti-stuck device

By using a push mechanism and a swing mechanism to keep the lifting chain vertical, combined with servo motor adjustment, buffering and anti-sway, and lubrication, the problem of the lifting chain tilting and jamming is solved, thus improving the service life and operational stability of the equipment.

CN117864932BActive Publication Date: 2025-11-07HUAIBEI MINING CO LTD +1
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Patent Information

Application Number
CN202410053382.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-01-15
Publication Date
2025-11-07
Estimated Expiration
2044-01-15

AI Technical Summary

Technical Problem

The lifting chains of existing underground hydraulic lifting beams are prone to tilting at large angles when lifting large or small heavy objects, which can cause them to jam and affect the lifting operation.

Method used

The lifting chain is kept vertical by a pushing mechanism and a swinging mechanism. The chain is pushed by a mounting frame and a wheel assembly. A servo motor and a buffer anti-sway mechanism reduce swaying. A brushing mechanism removes rust and a lubrication mechanism provides lubrication.

Benefits of technology

This effectively prevents the lifting chain from jamming during hoisting, extends the service life of the equipment, and ensures smooth chain operation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to the field of hydraulic lifting beam, especially to a mine hydraulic lifting beam chain anti-blocking device.The present application provides a mine hydraulic lifting beam chain anti-blocking device which can avoid the lifting chain from blocking during lifting and improve the service life of the equipment.The mine hydraulic lifting beam chain anti-blocking device comprises two mounting pieces, a first connecting piece, a first guide rail, a second guide rail, a pushing mechanism and a swinging mechanism.The two mounting pieces are symmetrically distributed in front and back, and each mounting piece is connected with a first connecting piece on the lower side.The first connecting pieces are connected with the first guide rail and the second guide rail on the lower side between them.The pushing mechanism is arranged between the first guide rail and the second guide rail, and the swinging mechanism is arranged on the pushing mechanism.The lifting chain is pushed and supported by the mounting frame and the first rotating wheel, so that the upper part of the lifting chain always maintains a vertical state, which can avoid the lifting chain from blocking during lifting and improve the service life of the equipment.
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Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydraulic lifting beams, particularly to a mine hydraulic lifting beam chain anti-locking device. BACKGROUND

[0002] The hydraulic lifting beam is a device for lifting and transporting heavy objects, which uses a hydraulic system to realize lifting and angle adjustment.

[0003] The existing mine hydraulic lifting beam usually needs to hook the lifting hook on the lifting chain with the heavy object, and then control the lifting and angle adjustment of the heavy object through the hydraulic system. However, when the volume of the heavy object is too large or too small, the lifting chain will tilt at a large angle during lifting, which can easily cause the lifting chain to be locked and affect the lifting work.

[0004] Therefore, in view of the above problems, the present application provides a mine hydraulic lifting beam chain anti-locking device which can avoid the lifting chain from being locked during lifting and improve the service life of the device. SUMMARY

[0005] In order to overcome the shortcomings of the existing device that the lifting chain will tilt at a large angle during lifting, which can easily cause the lifting chain to be locked and affect the lifting work, the present application provides a mine hydraulic lifting beam chain anti-locking device which can avoid the lifting chain from being locked during lifting and improve the service life of the device.

[0006] The technical implementation scheme of the present application is as follows: a mine hydraulic lifting beam chain anti-locking device, comprising mounting members, first connecting members, first guide rails, second guide rails, a pushing mechanism and a swinging mechanism, the mounting members are symmetrical in front and back, each mounting member is connected with a first connecting member on the lower side, the first connecting members are connected with the first guide rails and the second guide rails on the lower side, the first guide rails and the second guide rails are provided with a pushing mechanism for pushing the lifting chain to keep the upper part of the lifting chain vertical, and the pushing mechanism is provided with a swinging mechanism for controlling the swinging of the lifting chain during falling.

[0007] More preferably, the pushing mechanism comprises a first sliding frame, a mounting frame, a first fixed seat, a hydraulic cylinder, a U-shaped frame, a first rotating wheel and a driving assembly, a plurality of first sliding frames are slidably connected between the first guide rail and the second guide rail, the mounting frame is connected between the first sliding frames, the first fixed seat is connected to the mounting frame, the hydraulic cylinder is connected to the first fixed seat, the U-shaped frame is connected to the extension end of the hydraulic cylinder, the first rotating wheel is rotatably connected to the U-shaped frame, the driving assembly is connected between the first rotating wheel and the U-shaped frame, under the guidance of the first guide rail and the second guide rail, the first sliding frame drives the mounting frame to move and adjust, the mounting frame is controlled to move to a position opposite to the lifting chain, and the lifting chain is pushed and supported by the mounting frame and the first rotating wheel, so that the upper part of the lifting chain always maintains a vertical state and prevents being stuck during lifting.

[0008] More preferably, the driving assembly comprises a driving motor and a gear box, the driving motor is connected to the front side of the U-shaped frame, and the gear box is connected between the output shaft of the driving motor and the first rotating wheel.

[0009] More preferably, the swinging mechanism comprises a guide frame, a second sliding frame, a second rotating wheel, a first spring, a first connecting frame, a one-way bearing and a rotating piece, the guide frame is connected to the U-shaped frame, the second sliding frame is slidably connected to the guide frame, the first spring is connected between the second sliding frame and the guide frame, the second rotating wheel is rotatably connected to the second sliding frame, the first connecting frame is connected to the rear side of the second sliding frame, the one-way bearing is connected to the first rotating wheel, and the rotating piece is connected to the one-way bearing, so that the lifting chain is located between the first rotating wheel and the second rotating wheel, the first rotating wheel drives the rotating piece to rotate through the one-way bearing, the rotating piece rotates to press the first connecting frame, the first connecting frame moves to drive the second sliding frame and the second rotating wheel to move under the guidance of the guide frame, and the first spring is compressed under stress, so as to push the lifting chain to swing.

[0010] More preferably, it further comprises a position adjusting mechanism capable of automatically controlling the mounting frame to rotate, the position adjusting mechanism comprises a second connecting frame, a servo motor and a third rotating wheel, the second connecting frame is connected to the mounting frame, the servo motor is connected to the upper side of the front and rear parts of the second connecting frame, the third rotating wheel is rotatably connected to the front and rear parts of the second connecting frame, the gear box is connected between the third rotating wheel and the output shaft of the adjacent servo motor, the third rotating wheel is in contact with the first guide rail, the output shaft of the servo motor drives the third rotating wheel to rotate through the gear box, and the third rotating wheel drives the mounting frame to rotate and adjust the position.

[0011] More preferably, it further comprises a buffer damping mechanism capable of damping the swing amplitude of the lifting chain, the buffer damping mechanism comprising a third connecting frame, a sliding rod, a rotating guide frame and a second spring, the first fixed seat is connected with the third connecting frame, the lower part of the third connecting frame is symmetrically connected with the sliding rod in a sliding manner, the rotating guide frame is rotatably connected to the sliding rod, and the rotating guide frame is connected with a plurality of second springs on the third connecting frame, so that the lifting chain is located between the rotating guide frames, and under the action of the second spring, when the lifting chain swings, the sliding rod on the third connecting frame is driven to slide through the rotating guide frame, thereby buffering the lifting chain, and the rotating guide frame rotates on the sliding rod to adapt to the inclination angle of the lifting chain.

[0012] More preferably, it further comprises a brushing mechanism capable of brushing off rust on the lifting chain, the brushing mechanism comprising a second connecting piece and a brush, the second connecting piece is connected to the upper and lower sides of the rotating guide frame, and the brush is connected to the second connecting piece, when the lifting chain is located between the rotating guide frames, the lifting chain moves up and down between the rotating guide frames to generate friction with the brush, thereby brushing off the rust on the lifting chain through the brush.

[0013] More preferably, it further comprises a lubricating mechanism capable of lubricating the lifting chain, the lubricating mechanism comprising a second fixed seat and a spraying pipe, the second fixed seat is connected to the upper side of the middle part of the mounting frame, and the spraying pipe is connected to the second fixed seat, the spraying pipe is connected with an external conveying device, and the lubricating oil is sprayed on the lifting chain through the spraying pipe, thereby lubricating the lifting chain and prolonging the service life of the lifting chain.

[0014] Beneficial effects: 1. The mounting frame and the first rotating wheel are used for pushing and supporting the lifting chain, so that the upper part of the lifting chain always maintains a vertical state, avoiding the lifting chain from being stuck during lifting and improving the service life of the equipment.

[0015] 2. The third rotating wheel is driven to rotate by the output shaft of the servo motor, and the mounting frame is driven to rotate by the third rotating wheel, so that the position of the mounting frame can be automatically adjusted, which is convenient.

[0016] 3. The lifting chain is located between the rotating guide frames, and under the action of the second spring, when the lifting chain swings, the sliding rod on the third connecting frame is driven to slide through the rotating guide frame, so that the lifting chain is buffered, and the swing amplitude of the lifting chain is avoided.

[0017] 4. The lifting chain moves up and down between the rotating guide frames to generate friction with the brush, so that the rust on the lifting chain is brushed off by the brush, and the possibility of the lifting chain being stuck is reduced.

[0018] 5. This invention connects the spray pipe to an external conveying device and sprays lubricating oil onto the lifting chain through the spray pipe, thereby lubricating the lifting chain, increasing its service life, and reducing the possibility of the lifting chain jamming. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the actuating mechanism of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the swing mechanism of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the position adjustment mechanism and lubrication mechanism of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the buffer anti-sway mechanism and the brush removal mechanism of the present invention.

[0025] Reference numerals: 1-Mounting component, 2-First connecting component, 3-First guide rail, 4-Second guide rail, 5-Pushing mechanism, 50-First sliding frame, 51-Mounting frame, 52-First fixed seat, 521-Hydraulic cylinder, 53-U-shaped frame, 54-First rotating wheel, 55-Drive assembly, 6-Swing mechanism, 60-Guide frame, 61-Second sliding frame, 62-Second rotating wheel, 63-First spring, 64-First connecting frame, 65-One-way bearing, 66-Rotating component, 7-Position adjustment mechanism, 70-Second connecting frame, 71-Servo motor, 72-Third rotating wheel, 8-Buffer anti-sway mechanism, 80-Third connecting frame, 81-Sliding rod, 82-Rotating guide frame, 83-Second spring, 9-Brushing mechanism, 90-Second connecting component, 91-Brush bristles, 10-Lubrication mechanism, 101-Second fixed seat, 102-Spray tube. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but this does not limit the scope of protection and application of the present invention.

[0027] A device for preventing jamming of hydraulic lifting beam chains in mines, such as Figure 1 and Figure 2As shown, including the mounting member 1, the first connecting member 2, the first guide rail 3, the second guide rail 4, the push mechanism 5 and the swing mechanism 6, the mounting member 1 has two, front and rear symmetry distribution, the lower side of the mounting member 1 is connected with the first connecting member 2, the lower side of the first connecting member 2 is connected with the first guide rail 3 and the second guide rail 4, the first guide rail 3 and the second guide rail 4 are provided with the push mechanism 5, and the push mechanism 5 is provided with the swing mechanism 6.

[0028] As shown in Figures 1-3 , the push mechanism 5 includes a first sliding frame 50, a mounting frame 51, a first fixed seat 52, a hydraulic cylinder 521, a U-shaped frame 53, a first rotating wheel 54 and a drive assembly 55, the first guide rail 3 and the second guide rail 4 are slidingly connected with two first sliding frames 50, the first sliding frames 50 are connected with the mounting frame 51, the mounting frame 51 is connected with the first fixed seat 52, the first fixed seat 52 is connected with the hydraulic cylinder 521, the telescopic end of the hydraulic cylinder 521 is connected with the U-shaped frame 53, the U-shaped frame 53 is rotatably connected with the first rotating wheel 54, the first rotating wheel 54 and the U-shaped frame 53 are connected with the drive assembly 55, the drive assembly 55 includes a drive motor and a gear box, the drive motor is connected with the first rotating wheel 54 through the gear box.

[0029] As shown in Figure 1 , Figure 2 and Figure 4 , the swing mechanism 6 includes a guide frame 60, a second sliding frame 61, a second rotating wheel 62, a first spring 63, a first connecting frame 64, a one-way bearing 65 and a rotating part 66, the U-shaped frame 53 is connected with the guide frame 60, the guide frame 60 is slidingly connected with the second sliding frame 61, the second sliding frame 61 and the guide frame 60 are connected with the first spring 63, the second sliding frame 61 is rotatably connected with the second rotating wheel 62, the rear side of the second sliding frame 61 is connected with the first connecting frame 64, the first rotating wheel 54 is connected with the one-way bearing 65, and the one-way bearing 65 is connected with the rotating part 66.

[0030] The present application is used, first need to install the present application on the hydraulic lifting beam, after the lifting chain is located between the first rotating wheel 54 and the second rotating wheel 62, then control the driving motor output shaft rotation through the gear box drive the first rotating wheel 54 rotation, the first rotating wheel 54 rotates through the one-way bearing 65 drive rotating piece 66 rotation, rotating piece 66 rotation to the first connecting frame 64 extrusion, under the guidance of the guide frame 60, the first connecting frame 64 moves to drive the second sliding frame 61 and the second rotating wheel 62 to move, the first spring 63 is compressed, rotating piece 66 continues to rotate and the first connecting frame 64 is separated, the first spring 63 rebounds to drive the second sliding frame 61 and the second rotating wheel 62 to move reset, so as to push the lifting chain reciprocating, in turn facilitate the lifting chain to fall, then under the guidance of the first guide rail 3 and the second guide rail 4, push the first sliding frame 50 drive the mounting frame 51 to move adjustment, control the mounting frame 51 moves to the position opposite to the lifting chain, at this time, when the volume of the heavy object is too large or too small, the lifting chain is inclined, the mounting frame 51 and the first rotating wheel 54 can be pushed and supported to the lifting chain, so that the upper part of the lifting chain always maintains vertical state, avoids the lifting process from being stuck, the operation of the mounting frame 51 and the first rotating wheel 54 to the lifting chain is pushed and supported, so that the upper part of the lifting chain always maintains vertical state, which can avoid the lifting chain from being stuck during lifting, and improve the service life of the equipment.

[0031] As Figure 1 , Figure 2 and Figure 5 indicated, it also includes a position adjusting mechanism 7 capable of automatically controlling the rotation of the mounting frame 51, the position adjusting mechanism 7 includes a second connecting frame 70, a servo motor 71 and a third rotating wheel 72, the mounting frame 51 is connected with the second connecting frame 70, the second connecting frame 70 is connected with the servo motor 71 on the upper side of the front and rear two parts, the second connecting frame 70 is rotatably connected with the third rotating wheel 72 on the front and rear two parts, the third rotating wheel 72 is connected with the gear box between the adjacent servo motor 71 output shaft, and the third rotating wheel 72 is in contact with the first guide rail 3.

[0032] When the position adjusting mechanism 7 of the present application is used, the mounting frame 51 can be automatically controlled to rotate, when the position of the mounting frame 51 needs to be adjusted, the servo motor 71 can be started, the servo motor 71 output shaft rotates through the gear box to drive the third rotating wheel 72 to rotate, the third rotating wheel 72 rotates to drive the mounting frame 51 to rotate and adjust the position, after the adjustment work is completed, the servo motor 71 can be turned off, the operation of the servo motor 71 output shaft rotating to drive the third rotating wheel 72 to rotate and the third rotating wheel 72 rotating to drive the mounting frame 51 to rotate can automatically control the position adjustment of the mounting frame 51, which is more convenient.

[0033] AsFigure 1 、 Figure 2 and Figure 6 As shown in

[0034] In use of the buffering and swing-stopping mechanism 8 of the present application, the sway range of the hoisting chain can be slowed down, the hoisting chain is located between the rotating guide frames 82, and under the action of the second springs 83, when the hoisting chain swings, the rotating guide frames 82 drive the sliding rods 81 to slide on the third connecting frames 80, thereby buffering the hoisting chain, and the rotating guide frames 82 rotate on the sliding rods 81 to adapt to the inclination angle of the hoisting chain, which can buffer the hoisting chain and avoid the hoisting chain from swinging too much.

[0035] As shown in Figure 1 、 Figure 2 and Figure 6 It also includes a brushing mechanism 9 that can brush off rust on the hoisting chain, the brushing mechanism 9 includes a second connecting piece 90 and bristles 91, the second connecting piece 90 is connected to the upper and lower sides of the rotating guide frame 82, and the bristles 91 are connected to the second connecting piece 90.

[0036] In use of the brushing mechanism 9 of the present application, rust on the hoisting chain can be brushed off, when the hoisting chain is located between the rotating guide frames 82, the hoisting chain moves up and down between the rotating guide frames 82 to rub against the bristles 91, thereby brushing off rust on the hoisting chain with the bristles 91, which can brush off rust on the hoisting chain with the bristles 91 and reduce the possibility of the hoisting chain being stuck.

[0037] As shown in Figure 1 、 Figure 2 and Figure 5 It also includes a lubricating mechanism 10 that can lubricate the hoisting chain, the lubricating mechanism 10 includes a second fixed seat 101 and a spraying pipe 102, the second fixed seat 101 is connected to the upper side of the middle part of the mounting frame 51, and the spraying pipe 102 is connected to the second fixed seat 101.

[0038] In use of the lubricating mechanism 10 of the present application, the hoisting chain can be lubricated, the spraying pipe 102 is connected with the external conveying equipment, and the lubricating oil is sprayed on the hoisting chain through the spraying pipe 102, so that the hoisting chain is lubricated, and the service life of the hoisting chain is improved. Through the above operation of connecting the spraying pipe 102 with the external conveying equipment and spraying the lubricating oil on the hoisting chain through the spraying pipe 102, the hoisting chain can be lubricated, the service life of the hoisting chain is improved, and the possibility of the hoisting chain being stuck is reduced.

[0039] Although the present application has been described with reference to the example embodiments, it is to be understood that the application is not limited to the disclosed example embodiments. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all the variations and equivalents.

Claims

1. An anti-jamming device for a hydraulic hoisting beam chain under a mine, characterized in that: The utility model relates to a lifting chain automatic verticality maintaining device, including mounting (1), first connecting piece (2), first guide rail (3), second guide rail (4), push mechanism (5) and swing mechanism (6), mounting (1) has two, presents symmetry distribution before and after, the downside of mounting (1) is connected with first connecting piece (2), and the downside between first connecting piece (2) is connected with first guide rail (3) and second guide rail (4), be equipped with the push mechanism (5) for pushing hoisting chain and making its upper part keep vertical state between first guide rail (3) and second guide rail (4), be equipped with the swing mechanism (6) for controlling hoisting chain to swing in the process of falling on push mechanism (5) upper part; ​ Push mechanism (5) including first sliding frame (50), mounting frame (51), first fixed seat (52), hydraulic cylinder (521), U type frame (53), first runner (54) and drive assembly (55), first guide rail (3) and second guide rail (4) between slidingly connected with a plurality of first sliding frame (50), first sliding frame (50) between being connected with mounting frame (51), mounting frame (51) is connected with first fixed seat (52) on, first fixed seat (52) is connected with hydraulic cylinder (521) on, the telescopic end of hydraulic cylinder (521) is connected with U type frame (53), U type frame (53) is rotatably connected with first runner (54) on, first runner (54) is connected with drive assembly (55) between U type frame (53), under the guidance of first guide rail (3) and second guide rail (4), first sliding frame (50) drives mounting frame (51) to move and adjust, control mounting frame (51) moves to the position opposite hoisting chain, push and support hoisting chain through mounting frame (51) and first runner (54), so that the upper part of hoisting chain always keeps vertical state, avoids the occurrence of jam in the process of hoisting.

2. The chain anti-jamming device for hydraulic hoisting beam in a mine according to claim 1, characterized in that: Drive assembly (55) including drive motor and gear box, U type frame (53) front side is connected with drive motor, and the gear box is connected between drive motor output shaft and first runner (54), and drive motor output shaft rotates and drives first runner (54) to rotate through gear box.

3. The chain anti-jamming device for hydraulic hoisting beam in a mine according to claim 2, characterized in that: The swinging mechanism (6) comprises a guide frame (60), a second sliding frame (61), a second rotating wheel (62), a first spring (63), a first connecting frame (64), a one-way bearing (65) and a rotating part (66), the U-shaped frame (53) is connected with the guide frame (60), the guide frame (60) is slidably connected with the second sliding frame (61), the first spring (63) is connected between the second sliding frame (61) and the guide frame (60), the second sliding frame (61) is rotatably connected with the second rotating wheel (62), the rear side of the second sliding frame (61) is connected with the first connecting frame (64), the first rotating wheel (54) is connected with the one-way bearing (65), the one-way bearing (65) is connected with the rotating part (66), so that the lifting chain is located between the first rotating wheel (54) and the second rotating wheel (62), the first rotating wheel (54) rotates to drive the rotating part (66) to rotate through the one-way bearing (65), the rotating part (66) rotates to extrude the first connecting frame (64), under the guidance of the guide frame (60), the first connecting frame (64) moves to drive the second sliding frame (61) and the second rotating wheel (62) to move, and the first spring (63) is compressed under stress, so as to push the lifting chain to swing.

4. The chain anti-jamming device for hydraulic hoisting beam in a mine according to claim 3, characterized in that: It also comprises a position adjusting mechanism (7) capable of automatically controlling the rotation of the mounting frame (51), the position adjusting mechanism (7) comprises a second connecting frame (70), a servo motor (71) and a third rotating wheel (72), the mounting frame (51) is connected with the second connecting frame (70), the second connecting frame (70) is connected with the servo motor (71) on the upper sides of the front and rear two parts, the second connecting frame (70) is rotatably connected with the third rotating wheel (72) on the front and rear two parts, the third rotating wheel (72) is connected with the gear box between the adjacent servo motor (71) output shafts, the third rotating wheel (72) is in contact with the first guide rail (3), the servo motor (71) output shaft rotates to drive the third rotating wheel (72) to rotate through the gear box, and the third rotating wheel (72) rotates to drive the mounting frame (51) to rotate and adjust the position.

5. An anti-jamming device for a hydraulic chain hoisting beam in a mine according to claim 4, characterized in that: It also comprises a buffer damping mechanism (8) capable of slowing down the swinging amplitude of the lifting chain, the buffer damping mechanism (8) comprises a third connecting frame (80), a sliding rod (81), a rotating guide frame (82) and a second spring (83), the first fixed seat (52) is connected with the third connecting frame (80), the third connecting frame (80) is slidably connected with the sliding rod (81) on the left and right symmetrical lower parts, the sliding rod (81) is rotatably connected with the rotating guide frame (82), the rotating guide frame (82) is connected with the third connecting frame (80) on the upper sides of the third connecting frame (80), the lifting chain is located between the rotating guide frames (82), under the action of the second spring (83), when the lifting chain swings, the sliding rod (81) slides on the third connecting frame (80) through the rotating guide frame (82), thereby buffering the lifting chain, and the rotating guide frame (82) rotates on the sliding rod (81) to adapt to the inclination angle of the lifting chain.

6. An anti-jamming device for a hydraulic chain hoist for underground mining as claimed in claim 5, characterized in that: The brush mechanism (9) can brush off the rust on the lifting chain, the brush mechanism (9) comprises a second connecting piece (90) and a brush (91), the second connecting piece (90) is connected to the upper and lower sides of the rotating guide frame (82), and the brush (91) is connected to the second connecting piece (90). When the lifting chain is located between the rotating guide frames (82), the lifting chain moves up and down between the rotating guide frames (82) to generate friction with the brush (91), so that the rust on the lifting chain is brushed off by the brush (91).

7. An anti-jamming device for a hydraulic chain hoist for underground mining as claimed in claim 6, characterized in that: The lubricating mechanism (10) can lubricate the lifting chain, the lubricating mechanism (10) comprises a second fixed seat (101) and a spraying pipe (102), the second fixed seat (101) is connected to the upper middle part of the mounting frame (51), the spraying pipe (102) is connected to the second fixed seat (101), the spraying pipe (102) is connected with external conveying equipment, and the lubricating oil is sprayed on the lifting chain through the spraying pipe (102), so that the lifting chain is lubricated, and the service life of the lifting chain is improved.

Citation Information

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