Crane pre-tightening pulley support with pre-tightening function

Abstract

The utility model discloses a crane pre-tightening pulley support with a pre-tightening function, and relates to the technical field of cranes, the crane pre-tightening pulley support comprises a supporting plate, two circular grooves are formed in the top end of the supporting plate, a transverse plate is fixedly connected to one end of the supporting plate, and a motor is fixedly connected to the top end of the transverse plate; the output end of the motor is fixedly connected with a worm, the outer surface of the worm is in meshed connection with a worm gear, one end of the worm gear is fixedly connected with a two-way threaded rod, the positions, engraved with threads in different directions, of the two-way threaded rod are each sleeved with a vertical plate in a threaded mode, and the top ends of the two vertical plates are jointly in sliding connection with the bottom end of a supporting plate; the bottom ends of the two vertical plates are jointly connected with a bottom plate in a sliding mode, the two vertical plates are jointly movably connected with a rotating rod in a sleeving mode, by arranging a motor, the device can still keep good pre-tightening performance under the condition that the load change is large, and stable operation of a system is ensured.

Description

Technical Field

[0001] This application relates to the field of crane technology, and in particular to a crane preload pulley bracket with a preload function. Background Technology

[0002] Cranes are mechanical devices used to lift and move heavy objects, playing a vital role in modern industry and construction. Early cranes had relatively simple structures and limited functions, with significant limitations on the weight they could lift and the flexibility of their operation. As industry developed, the demand for cranes continued to increase, and their technology also continued to advance. Traditional cranes typically use mechanical transmission, connecting the hook to steel wire ropes, chains, etc., to lift heavy objects. However, this method suffers from problems such as low transmission efficiency, low precision, and high maintenance costs. Therefore, there is an urgent need in the market for a crane pre-tensioning pulley bracket with a pre-tensioning function.

[0003] According to announcement number CN 217947424 U, a crane pre-tensioning pulley bracket is disclosed. This technology discloses "a connecting part and a fixing plate. The lower end of the connecting part is connected to an external crane. The fixing plate includes a left fixing plate and a right fixing plate arranged in parallel opposite directions. The upper end of the left fixing plate is provided with two first short rods in an inverted V shape. The upper end of the right fixing plate is provided with two second short rods that correspond one-to-one with the first short rods. A pin is fixed between each first short rod and its corresponding second short rod. A first shaft hole is opened on the left fixing plate, and a second shaft hole that matches the first shaft hole is opened on the right fixing plate. A rotating shaft is rotatably provided between the first shaft hole and the second shaft hole. The rotating shaft is connected to the external pre-tensioning pulley through an external steel wire rope wound on the rotating shaft, thereby realizing the pre-tensioning of the steel wire rope on the external crane. The cooperation of the rotating shaft and the pin achieves the pre-tensioning and limiting of the steel wire rope, avoiding the occurrence of steel wire rope tangling."

[0004] Regarding the aforementioned technologies, the inventors believe that most existing pulley supports cannot effectively compress the pulleys, and cannot maintain good preload performance when the load is large. Furthermore, most existing preload pulleys only fix the wire rope through the wire rope groove, which makes it easy for the wire rope to fall off when it moves on the pulley surface, and the wire rope is easily damaged.

[0005] Regarding the aforementioned technologies, the inventors believe that a crane pre-tensioning pulley bracket with pre-tensioning function is needed to solve the above problems. Utility Model Content

[0006] The purpose of this application is to provide a crane pretensioning pulley bracket with pretensioning function to improve the problems of not being able to maintain good pretensioning performance and the easy damage to the wire rope.

[0007] The technical solution for a crane pre-tensioning pulley bracket with pre-tensioning function provided in this application is as follows:

[0008] A crane pre-tensioning pulley bracket with pre-tensioning function includes a support plate. Two circular grooves are formed at the top of the support plate, through which a wire rope can be wound around the pulley body. A horizontal plate is fixedly connected to one end of the support plate, and a motor is fixedly connected to the top of the horizontal plate. A worm gear is fixedly connected to the output end of the motor, and a worm wheel is meshed with the outer surface of the worm gear. A bidirectional threaded rod is fixedly connected to one end of the worm wheel. Vertical plates are threadedly sleeved at the points where the threads in different directions are engraved on the bidirectional threaded rod. The tops of the two vertical plates are slidably connected to the bottom end of the support plate, and the bottom ends of the two vertical plates are slidably connected to a base plate. A rotating rod is movably sleeved on the two vertical plates. A bearing is fixedly sleeved on the outer surface of the rotating rod located between the two vertical plates, and the pulley body is fixedly sleeved on the outer surface of the bearing.

[0009] By adopting the above technical solution, the wire rope is passed through one of the circular grooves, then through the fixed groove and through the rope receiving groove to be wound around the pulley body, and then through another circular groove to the drum of the crane. When the crane starts and pulls the heavy object up, the rope can drive the pulley body to rotate. Under the action of the bearing, the pulley body can run more smoothly. When the adjustment device needs to loosen the pulley, the motor is first turned on. The motor can drive the worm to rotate, the worm can drive the worm wheel to rotate, the worm wheel can drive the double-threaded rod to rotate, and the double-threaded rod can drive the two vertical plates to move in opposite directions. When the vertical plates are moved to the appropriate position, the friction between the pulley and the two vertical plates can be effectively reduced.

[0010] Optionally, the outer surface of the pulley body is provided with a rope receiving groove, and a fixing block is fixedly connected to the bottom end of the base plate. The top end of the fixing block is provided with a fixing groove, which can cooperate with the rope receiving groove to fix the wire rope.

[0011] By adopting the above technical solution, the wire rope can be wound around the pulley body through the rope receiving groove, so that the wire rope can drive the pulley to rotate. With the cooperation of the fixing groove and the rope receiving groove, the wire rope can be effectively fixed.

[0012] Optionally, both ends of the rotating rod are fixedly connected to limit plates.

[0013] By adopting the above technical solution, the limiting plate can prevent the limiting plate from disengaging from the bidirectional threaded rod when the two vertical plates move.

[0014] Optionally, two telescopic air rods are fixedly connected to one end of the two vertical plates facing each other.

[0015] By adopting the above technical solution, the telescopic air rod can effectively connect the two vertical plates, making the connection between the two vertical plates more stable.

[0016] Optionally, limit blocks are fixedly connected to both the upper and lower ends of the two vertical plates, and a limit groove is provided at the end of the support plate opposite to the bottom plate to cooperate with the two limit blocks.

[0017] By adopting the above technical solution, the two vertical plates can move more smoothly, reducing the shaking of the device.

[0018] Optionally, the base plate and the support plate are distributed in parallel, and the base plate and the support plate are the same size.

[0019] By adopting the above technical solution, the device can be made more stable during operation.

[0020] Optionally, the inner surface of the rope groove is fixedly coated with an anti-slip coating.

[0021] By adopting the above technical solutions, wire rope slippage can be effectively reduced.

[0022] Optionally, the radius of the rope receiving groove and the fixing groove are the same.

[0023] By adopting the above technical solution, the friction between the wire rope and the fixing groove can be increased while fixing the wire rope.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. By incorporating a motor, which drives the movement of two vertical plates, this application enables the device to maintain good preload performance even under significant load variations, thus ensuring stable system operation.

[0026] 2. By setting a fixing groove, the fixed groove and the wire rope groove can effectively prevent the phenomenon of dragging the steel cable when it moves on the pulley surface, thereby avoiding damage to the steel cable caused by the steel cable falling off. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this application.

[0028] Figure 2 This is a schematic diagram of the vertical plate structure of this application.

[0029] Figure 3 This is a schematic diagram of the pulley body structure of this application.

[0030] In the diagram, 1. Support plate; 2. Circular groove; 3. Vertical plate; 4. Base plate; 5. Motor; 6. Limiting groove; 7. Rotating rod; 8. Horizontal plate; 11. Worm gear; 12. Fixing groove; 13. Fixing block; 14. Telescopic air rod; 15. Anti-slip coating; 16. Limiting block; 17. Bidirectional threaded rod; 18. Worm gear; 19. Limiting plate; 101. Pulley body; 102. Rope groove; 103. Bearing. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1 - Appendix Figure 3 This application will be described in further detail below.

[0032] Example

[0033] A crane pre-tensioning pulley bracket with pre-tensioning function includes a support plate 1, a base plate 4, and two vertical plates 3. The upper part of the support plate 1 has two circular grooves 2 for use with wire ropes. The base plate 4 is parallel to the support plate 1 and has the same size. Limiting blocks 16 are fixedly connected to the upper and lower ends of the two vertical plates 3. The opposite ends of the support plate 1 and the base plate 4 are provided with two limiting grooves 6. The two vertical plates 3 are slidably connected to the upper part of the base plate 4 and the lower part of the support plate 1 through four limiting grooves 6 and four limiting blocks 16. A horizontal plate 8 is welded to one side of the support plate 1. A motor 5 is provided on the upper part of the horizontal plate 8. A worm gear 18 is fixedly connected to the output end of the motor 5. A worm wheel 11 is meshed with the outer surface of the worm gear 18. A bidirectional threaded rod 17 is fixedly connected to one side of the worm wheel 11.

[0034] The threaded rod 17 with threads in different directions is threadedly connected to the two vertical plates 3. The two vertical plates 3 are fixedly connected to two telescopic air rods 14 at opposite ends. The two vertical plates 3 are movably connected to a rotating rod 7. Two limiting plates 19 are respectively provided on both sides of the rotating rod 7. A bearing 103 is fixedly connected to the outside of the rotating rod 7 between the two vertical plates 3. A pulley body 101 is fixedly connected to the outside of the bearing 103.

[0035] The pulley body 101 has a rope groove 102 on its outside. The inside of the rope groove 102 is provided with anti-slip coating 15, so that the wire rope can drive the pulley body 101 to rotate. A fixing block 13 is provided on the upper part of the base plate 4. A fixing groove 12 is provided on the upper part of the fixing block 13. The fixing groove 12 has the same radius as the rope groove 102.

[0036] Working principle: The wire rope is passed through one of the circular grooves 2, then through the fixed groove 12 and through the rope receiving groove 102 to be wound around the pulley body 101, and through the other circular groove 2 to the drum of the crane. When the crane starts and pulls the heavy object up, the rope can drive the pulley body 101 to rotate. Under the action of the bearing 103, the pulley body 101 can run more smoothly. When the adjustment device needs to be loosened to release the pulley, the motor 5 is turned on first. The motor 5 can drive the worm 18 to rotate, the worm 18 can drive the worm wheel 11 to rotate, the worm wheel 11 can drive the double-threaded rod 17 to rotate, and the double-threaded rod 17 can drive the two vertical plates 3 to move in opposite directions. When the vertical plates 3 are moved to the appropriate position, the friction between the pulley body 101 and the two vertical plates 3 can be effectively reduced.

[0037] The wire rope can be wound around the pulley body 101 through the rope receiving groove 102, so that the wire rope can drive the pulley to rotate. With the cooperation of the fixing groove 12 and the rope receiving groove 102, the wire rope can be effectively fixed.

[0038] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A crane pre-tensioning pulley bracket with pre-tensioning function, comprising a support plate (1), characterized in that: The top of the support plate (1) has two circular grooves (2). One end of the support plate (1) is fixedly connected to a horizontal plate (8). The top of the horizontal plate (8) is fixedly connected to a motor (5). The output end of the motor (5) is fixedly connected to a worm gear (18). The outer surface of the worm gear (18) is meshed with a worm wheel (11). One end of the worm wheel (11) is fixedly connected to a bidirectional threaded rod (17). Vertical plates (3) are threadedly sleeved at the threaded locations of the bidirectional threaded rod (17) with different directions of threads. The tops of the two vertical plates (3) are slidably connected to the bottom of the support plate (1). The bottoms of the two vertical plates (3) are slidably connected to a base plate (4). The two vertical plates (3) are movably sleeved with a rotating rod (7). The outer surface of the rotating rod (7) located between the two vertical plates (3) is fixedly sleeved with a bearing (103). The outer surface of the bearing (103) is fixedly sleeved with a pulley body (101).

2. A crane pre-tensioning pulley bracket with pre-tensioning function according to claim 1, characterized in that: The outer surface of the pulley body (101) is provided with a rope groove (102), and a fixing block (13) is fixedly connected to the bottom end of the base plate (4), and a fixing groove (12) is provided at the top end of the fixing block (13).

3. A crane pre-tensioning pulley bracket with pre-tensioning function according to claim 1, characterized in that: Limiting plates (19) are fixedly connected to both ends of the rotating rod (7).

4. A crane pre-tensioning pulley bracket with pre-tensioning function according to claim 1, characterized in that: Two telescopic air rods (14) are fixedly connected to one end of the two vertical plates (3) facing each other.

5. A crane pre-tensioning pulley bracket with pre-tensioning function according to claim 1, characterized in that: Limiting blocks (16) are fixedly connected to both the upper and lower ends of the two vertical plates (3), and limiting grooves (6) are opened at the opposite end of the support plate (1) and the bottom plate (4) to cooperate with the two limiting blocks (16).

6. A crane pre-tensioning pulley bracket with pre-tensioning function according to claim 2, characterized in that: The base plate (4) and the support plate (1) are distributed in parallel, and the base plate (4) and the support plate (1) are the same size.

7. A crane pre-tensioning pulley bracket with pre-tensioning function according to claim 2, characterized in that: The inner surface of the rope groove (102) is fixedly coated with an anti-slip coating (15).

8. A crane pre-tensioning pulley bracket with pre-tensioning function according to claim 2, characterized in that: The radius of the rope-receiving groove (102) is the same as that of the fixing groove (12).

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