Steel wire rope pre-tightening device for crawler crane

Abstract

The utility model provides a steel wire rope pre-tightening device for a crawler crane. The steel wire rope pre-tightening device is provided with a pre-tightening winding drum and an adjusting winding drum, wherein the pre-tightening winding drum is provided with a threaded accommodating groove around the outer surface of the lateral wall which rotates transversely; the adjusting winding drum is provided with an annular accommodating groove along the circumferential direction of the outer surface which rotates vertically; after the pre-tightening winding drum rotates in the direction opposite to the rope inlet direction of the steel wire rope to be pre-tightened, pre-tightening force is applied to the steel wire rope to be pre-tightened, self-stress of the steel wire rope of the winding drum is eliminated, and after the steel wire rope to be pre-tightened enters the rotating direction, the winding drum is adjusted according to the rope inlet direction of the steel wire rope to be pre-tightened so as to adjust and output the pre-tightened steel wire rope. The steel wire rope arranging and winding quality is improved, abrasion between ropes is reduced, the service life of the steel wire rope is prolonged, the safety and efficiency of lifting operation are guaranteed, and the device is simple in structure and convenient to manufacture.

Description

Technical Field

[0001] The utility model belongs to the technical field of steel wire rope pre-tightening in crane hoisting operation, and in particular relates to a steel wire rope pre-tightening device for a crawler crane. Background Art

[0002] A crawler crane is a mobile jib crane equipped with a crawler running device. It consists of a boom, a turntable and other metal structures, a lifting mechanism, a rotating mechanism, a luffing mechanism and a running mechanism. The lifting mechanism and the luffing mechanism use a drum to wind the steel rope, and the lifting device is raised and lowered and the boom is pitched and luffed through a complex pulley set. The lifting motor drives the drum to rotate through a coupling and a hollow shaft of a reducer, so that the wire rope or cable wound on the drum drives the hook device to rise or fall. Before using the lifting mechanism, the wire rope needs to be wound around the drum. The winding method is to control the rotation of the motor connected to the drum to rotate the drum, so that the wire rope is gradually wound around the drum. Under the condition of multi-layer winding, the inner wire rope may become loose, and the loose inner layer will be squeezed or clamped to the groove wall due to the extrusion of the outer layer. In this way, all the wire ropes will be crushed and flattened prematurely due to the "load" of the top layer, greatly shortening the service life of the wire rope. In addition, it is easy to cause the upper wire rope to be pressed into the lower layer, and then cause the wire rope to be tangled. Therefore, a certain correct pre-tightening force is applied to the wire rope when winding the rope to ensure that the wire rope is neatly and tightly wound in the winch, which can avoid the phenomenon of rope clamping, rope tangling, etc., reduce wire rope wear, extend the service life of the wire rope, and avoid safety hazards during lifting.

[0003] Therefore, the present application proposes a wire rope pretensioning device for a crawler crane, which provides a pretensioning force when the wire rope is wound onto a drum, thereby improving the winding quality of the wire rope, reducing rope wear, extending the service life of the wire rope, and ensuring the safety and efficiency of lifting operations. Utility Model Content

[0004] In view of the above-mentioned existing problems, the utility model proposes a wire rope pretensioning device for a crawler crane to solve the problems existing in the above-mentioned prior art, provide pretensioning force when the wire rope is wound onto a drum, improve the wire rope winding quality, reduce rope wear, extend the service life of the wire rope, ensure the safety and efficiency of lifting operations, and the device has a simple structure and is easy to manufacture.

[0005] To achieve the above-mentioned purpose, the utility model provides a wire rope pretensioning device for a crawler crane, comprising a base and a drum assembly; the drum assembly is rotatably mounted on the base, and comprises a transversely rotating pretensioning drum and a vertically rotating adjustment drum, the outer surface of the side wall of the pretensioning drum is surrounded by a threaded receiving groove for accommodating the wire rope to be pretensioned, and the outer surface of the side wall of the adjustment drum is circumferentially provided with an annular receiving groove for accommodating the wire rope to be pretensioned; the rotation direction of the pretensioning drum is opposite to the rope feeding direction of the wire rope to be pretensioned, and the rotation direction of the adjustment drum is the same as the rope feeding direction of the wire rope to be pretensioned.

[0006] Preferably, a guide assembly is also provided on the base, and the guide assembly is arranged in front of the reel assembly, including a guide bracket and a guide wheel group rotatably arranged on the guide bracket, and the guide wheel group includes an upper guide wheel and a lower guide wheel arranged below the upper guide wheel.

[0007] Preferably, the wheel axles of the upper guide wheel and the lower guide wheel are rotatably mounted on the guide bracket based on the same vertical line, and the rotation directions of the upper guide wheel and the lower guide wheel are opposite.

[0008] Preferably, the adjustment reel also includes a clamping assembly, which includes a clamping frame and a plurality of clamping wheels; the clamping frame is arranged above the adjustment reel with an adjustable height, the clamping wheel corresponds to the position of the annular accommodating groove, and is rotatably arranged on the clamping frame, and the edge of the clamping wheel is pressed against the annular accommodating groove.

[0009] Preferably, a steering assembly is also provided on the base, and the steering assembly is arranged behind the reel assembly and includes a steering pulley.

[0010] Preferably, a driving assembly is also provided on the base, and the driving assembly includes a first driving member for driving the guide wheel group to rotate, a first motor for driving the preload reel to rotate, and a second motor for driving the adjustment reel to rotate.

[0011] Preferably, the first driving member is arranged on the guide bracket.

[0012] Preferably, the power of the first motor is always smaller than the power of the second motor.

[0013] Compared with the prior art, the utility model has the following beneficial effects: a wire rope pretensioning device for a crawler crane provided by the utility model is provided with a pretensioning drum having a threaded receiving groove around the outer surface of a transversely rotating side wall and an adjustment drum having an annular receiving groove along its circumference on the outer surface of a vertically rotating side wall; after the pretensioning drum is rotated in the opposite direction to the feed direction of the wire rope to be pretensioned, a pretensioning force is applied to the wire rope to be pretensioned, and the self-stress of the drum wire rope is eliminated; after the pretensioning wire rope enters the rotation direction, the drum is adjusted according to the feed direction of the wire rope to be pretensioned, so as to adjust the output of the pretensioned wire rope, improve the wire rope winding quality, reduce the wear between ropes, extend the service life of the wire rope, and ensure the safety and efficiency of the lifting operation; the device has a simple structure and is easy to manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a left view of a wire rope pretensioning device for a crawler crane according to the utility model;

[0015] Figure 2 The utility model is a top view of a wire rope pretensioning device for a crawler crane.

[0016] In the figure: 1-base, 2-first motor, 3-second motor, 5-guide bracket, 6-upper guide wheel, 7-lower guide wheel, 8-pretensioning drum, 9-adjusting drum, 10-pressing frame, 11-pressing wheel, 12-steering pulley, 13-wire rope to be pre-tightened. DETAILED DESCRIPTION

[0017] To further describe the utility model in detail, the following is an explanation with reference to the accompanying drawings. It is particularly pointed out that the embodiments described below are only a part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] See also Figure 1 and Figure 2 The present embodiment provides a wire rope pretensioning device for a crawler crane, comprising a base 1, a guide assembly, a drum assembly, a steering assembly and a drive assembly.

[0019] The driving assembly includes a first driving member, a first motor 2 and a second motor 3; the first driving member is arranged on the guide bracket 5, the first motor 2 is used to drive the pre-tensioning drum 8 to rotate; the second motor 3 is used to drive the adjustment drum 9 to rotate; in this embodiment, the first motor 2 and the second motor 3 are both hydraulic motors, and the power of the first motor 2 is always less than the power of the second motor 3, so that the pre-tensioning drum 8 applies sufficient pre-tensioning force to the wire rope 13 to be pre-tensioned while ensuring that the adjustment drum 9 can output the pre-tensioned wire rope.

[0020] The guide assembly is arranged in front of the drum assembly, and includes a guide bracket 5 and a guide wheel group, and the guide wheel group includes an upper guide wheel 6 and a lower guide wheel 7 arranged below the upper guide wheel 6; the wheel axles of the upper guide wheel 6 and the lower guide wheel 7 are provided with depressions to accommodate the wire rope 13 to be pre-tightened, and the wheel axles are rotatably mounted on the guide bracket 5 based on the same vertical line, and the upper guide wheel 6 rotates in opposite directions to the lower guide wheel 7, and is used to clamp the wire rope 13 to be pre-tightened and feed the wire rope 13 to be pre-tightened into the device. The steering assembly is a steering pulley 12 arranged behind the drum assembly, which is used to change the output direction of the pre-tightened wire rope to facilitate the subsequent winding work on the crawler crane.

[0021] The drum assembly is rotatably mounted on the base 1, and includes a transversely rotating pre-tightening drum 8 and a vertically rotating adjusting drum 9. The outer surface of the side wall of the pre-tightening drum 8 is surrounded by a threaded receiving groove for accommodating the pre-tightened wire rope 13. The outer surface of the side wall of the adjusting drum 9 is provided with an annular receiving groove for accommodating the pre-tightened wire rope 13 along its circumference. A clamping assembly is also provided above the clamping assembly, which includes a clamping frame 10 and a plurality of clamping wheels 11. The clamping frame 1 0 is arranged on the adjusting drum 9 with adjustable height, the pressing wheel 11 corresponds to the position of the annular receiving groove, and is rotatably arranged on the pressing frame 10, and the edge of the pressing wheel 11 is pressed into the annular receiving groove; and the rotation direction of the pre-tightening drum 8 is opposite to the feeding direction of the wire rope 13 to be pre-tightened, so as to apply a pre-tightening force to the wire rope 13 to be pre-tightened, and the rotation direction of the adjusting drum 9 is the same as the feeding direction of the wire rope 13 to be pre-tightened, and is used to adjust the output of the pre-tightened wire rope.

[0022] In this embodiment, the above is only an example and is not intended to limit the scope of protection of this application.

[0023] The utility model provides a wire rope pretensioning device for a crawler crane, which is provided with a pretensioning drum with a threaded receiving groove around the outer surface of a transversely rotating side wall and an adjusting drum with an annular receiving groove along its circumference on the outer surface of a vertically rotating side wall. After the pretensioning drum is rotated in the opposite direction to the rope feeding direction of the wire rope to be pretensioned, a pretensioning force is applied to the wire rope to be pretensioned to eliminate the self-stress of the drum wire rope. After the pretensioning wire rope enters the rotation direction, the drum is adjusted according to the rope feeding direction of the wire rope to be pretensioned to adjust the output of the pretensioned wire rope, improve the rope winding quality of the wire rope, reduce the wear between ropes, extend the service life of the wire rope, ensure the safety and efficiency of the lifting operation, and the device has a simple structure and is easy to manufacture.

[0024] The embodiments disclosed above are only for the purpose of describing and introducing the present invention in detail, and cannot be used to limit the scope of the present invention. Therefore, simple improvements and changes made according to the scope of application of the claims of the present invention still fall within the scope of protection of the present invention.

[0025] The protection scope of the present invention shall be based on the limited scope. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the spirit and scope of the present invention, and these and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A wire rope pretensioning device for a crawler crane, characterized in that: It comprises a base and a drum assembly; the drum assembly is rotatably mounted on the base, and comprises a transversely rotating pre-tensioning drum and a vertically rotating adjusting drum; the outer surface of the side wall of the pre-tensioning drum is provided with a threaded receiving groove for accommodating the steel wire rope to be pre-tensioned, and the outer surface of the side wall of the adjusting drum is provided with an annular receiving groove for accommodating the steel wire rope to be pre-tensioned along its circumference; the rotation direction of the pre-tensioning drum is opposite to the feed direction of the steel wire rope to be pre-tensioned, and the rotation direction of the adjusting drum is the same as the feed direction of the steel wire rope to be pre-tensioned.

2. A wire rope pretensioning device for a crawler crane according to claim 1, characterized in that: A guide assembly is also provided on the base, and the guide assembly is arranged in front of the reel assembly, including a guide bracket and a guide wheel group rotatably arranged on the guide bracket, and the guide wheel group includes an upper guide wheel and a lower guide wheel arranged below the upper guide wheel.

3. A wire rope pretensioning device for a crawler crane according to claim 2, characterized in that: The wheel axles of the upper guide wheel and the lower guide wheel are rotatably mounted on the guide bracket based on the same vertical line, and the rotation directions of the upper guide wheel and the lower guide wheel are opposite.

4. The wire rope pretensioning device for a crawler crane according to claim 1, characterized in that: The adjustment reel also includes a clamping assembly, which includes a clamping frame and a plurality of clamping wheels; the clamping frame is arranged above the adjustment reel with an adjustable height, and the clamping wheel corresponds to the position of the annular accommodating groove and is rotatably arranged on the clamping frame, and the edge of the clamping wheel is pressed against the annular accommodating groove.

5. The wire rope pretensioning device for a crawler crane according to claim 1, characterized in that: A steering assembly is also arranged on the base, and the steering assembly is arranged behind the reel assembly and comprises a steering pulley.

6. The wire rope pretensioning device for a crawler crane according to claim 2, characterized in that: A driving assembly is also arranged on the base, and the driving assembly includes a first driving member for driving the guide wheel group to rotate, a first motor for driving the pre-tightening reel to rotate, and a second motor for driving the adjusting reel to rotate.

7. A wire rope pretensioning device for a crawler crane according to claim 6, characterized in that: The first driving member is arranged on the guide bracket.

8. The wire rope pretensioning device for a crawler crane according to claim 6, characterized in that: The power of the first motor is always smaller than the power of the second motor.

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