A device to prevent wire rope from jumping out

Abstract

The present invention provides a device to prevent a wire rope from jumping out, and belongs to the technical field of hoists. It solves the technical problems that the wire rope in the existing device to prevent a wire rope from jumping out is in a relaxed state and has no ability to return to straightness. A device to prevent a wire rope from jumping out comprises a rope wheel and a wire rope, wherein the outer peripheral surface of the rope wheel has a threaded groove, the outer peripheral sleeve of the rope wheel is provided with a movable nut, a circle of screw wheels is provided on the inner peripheral surface of the movable nut, the screw wheels and the threaded grooves are spirally driven, a rope threading hole is provided on the movable nut along the tangent direction of the screw wheel, the inner hole of the rope threading hole is aligned with one end of the screw wheel, a mounting hole is provided on the movable nut along the radial direction of the screw wheel, the axis of the mounting hole is perpendicular to the axis of the rope threading hole and is connected, and a pressure wheel assembly is provided in the mounting hole. The present invention enables the wire rope to return to straightness, ensures that the wire rope will not be affected by its tension when it is retracted, makes the wire rope recovery smoother, and improves the efficiency of the whole machine.

Description

Technical Field

[0001] The invention belongs to the technical field of hoists, and in particular relates to a device for preventing a steel wire rope from jumping out. Background Art

[0002] The hoist completes the transportation process by dragging the flexible wire rope and the transported goods up and down through a power machine. One end of the wire rope of the hoist is wound in a wire storage bin with a groove, and the other end is connected to the workpiece. When there is no workpiece or the workpiece is too light, the wire rope will not be affected by gravity. If the hoist continues to operate at this time, the wire rope in the wire storage bin will run out of the wire groove, causing the wire rope to be tangled and disordered and then stuck.

[0003] At present, there is a device for preventing a steel cable from loosening on a rope pulley groove with application number 2012202682251, which comprises a guide rope loop composed of two guide rope half loops to form a full loop, and a guide rope tongue and a rope pressing wheel assembly are fixed on the side of the guide rope loop. However, the device has certain disadvantages: 1. When the steel wire rope is recovered without a heavy object hanging on it, the steel wire rope is in a relaxed state and has no ability to return to straightness, and the steel wire rope will get stuck at the tongue mouth of the guide rope tongue; 2. The limiting device is also likely to cause the steel wire rope to need to be wound around the wire groove of the rope pulley for multiple turns, resulting in waste of the steel wire rope and increasing the overall axial length of the rope pulley. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a device for preventing a wire rope from jumping out. The technical problem to be solved by the present invention is: how to prevent the wire rope from getting stuck due to its straightness when it is not subject to gravity, and how to increase the travel of the wire rope when the axial length of the rope wheel is constant.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a device for preventing a wire rope from jumping out, comprising a rope pulley and a wire rope, the outer circumferential surface of the rope pulley having a threaded groove, a full circle of movable nut being sleeved on the outer circumference of the rope pulley, a circle of screw wheel being arranged on the inner circumferential surface of the movable nut, the screw wheel and the threaded groove being spirally transmitted, a rope threading hole being arranged along the tangential direction of the screw wheel on the movable nut, the inner hole mouth of the rope threading hole being aligned with one end of the screw wheel, a mounting hole being arranged along the radial direction of the screw wheel on the movable nut, the axis of the mounting hole being perpendicular to the axis of the rope threading hole and being connected, and a pressure wheel assembly being arranged in the mounting hole.

[0006] The present invention mainly sets a whole circle of annular mobile nut as a whole, and sets a circle of screw wheel on its inner circumference to cooperate with the thread groove. The whole circle of mobile nut simplifies the manufacturing process and improves the processing accuracy of the screw wheel, so that the screw wheel and the thread groove can cooperate better. The mobile nut set with a whole circle can better suppress the wire rope to prevent the wire rope from jumping out of the thread groove, and more smoothly carry the wire rope in the thread groove under the spiral cooperation of the one circle of screw wheel and the thread groove. For the convenience of description, the end of the mobile nut close to the starting end of the wire rope is called the outer end, and the end away from the starting end of the wire rope is called the inner end. The one circle of screw wheel also has an outer end and an inner end, and there is a certain pitch between the outer end and the inner end of the screw wheel. A rope threading hole is set on the mobile nut along the tangent direction of the screw wheel. The inner hole of the rope threading hole is aligned with one end of the screw wheel, that is, the inner hole of the rope threading hole is aligned with the outer end of the screw wheel, which ensures that the screw wheel only occupies the position of one circle of the thread groove. The position setting of the rope threading hole and the one circle of screw wheel ensures that the wire rope will not occupy the circle or empty circle when it is recovered. The screw wheel only occupies one circle of the thread groove, and the second circle of the thread groove is the wire rope. The stroke of the wire rope is increased on the same axial length of the rope wheel, which reduces the waste of the wire rope. When the stroke of the wire rope is constant, the axial length of the rope wheel can also be reduced, the weight of the rope wheel can be reduced, and the efficiency of the whole machine can be improved. Due to the characteristics of the wire rope itself, when there is no heavy object hanging, the wire rope will have a certain tension to make it rebound and get stuck when the rope is collected. This solution opens a rope threading hole in the tangential direction of the screw wheel, and sets a mounting hole on the moving nut along the radial direction of the screw wheel. The axis of the mounting hole and the axis of the rope threading hole are connected to each other, and a pressure wheel assembly is set in the mounting hole. The cooperation of the pressure wheel assembly and the rope threading hole makes the wire rope have the ability to return to straightness, ensuring that the wire rope will not be affected by its tension when it is retracted, making the wire rope recovery smoother. A circle of high-precision screw wheel, the thread groove, the rope threading hole and the pressure wheel assembly work together to make the moving nut better prevent the wire rope from jumping out and smoothly retract and release, and also increase the stroke of the wire rope.

[0007] Furthermore, the mounting hole passes through the movable nut, the pressure wheel assembly includes a roller, a pin and a pressure plate, the pin passes through the roller and is fixed to the pressure plate, the roller is located in the mounting hole and contacts the steel wire rope, and the pressure plate is fixed to the movable nut. This makes it easier to install the pressure wheel assembly and allows the pressure wheel assembly and the steel wire rope to have a certain amount of movement margin to ensure smooth retraction and release of the steel wire rope.

[0008] Furthermore, the mounting hole is a strip-shaped hole, and the movable nut is also provided with a strip-shaped pin hole spanning the mounting hole, and both ends of the pin shaft are located in the strip-shaped pin hole, which can better increase the fixing strength of the pressure wheel assembly and better cooperate with the wire rope.

[0009] Furthermore, the pressure plate includes an integrally formed vertical plate and parallel plate, the two ends of the vertical plate have a fixing hole 1 and a fixing hole 2 respectively, the pin is fixed to the fixing hole 1, the moving nut has a fixing hole 3, the fixing holes 2 and 3 are provided with a rotating shaft, and the parallel plate covers the outer circumference of the moving nut and is fixed by fasteners. It is convenient to disassemble and replace the roller, and the roller and the wire rope have a certain adjustment space for contact.

[0010] Furthermore, the movable nut is provided with guide holes uniformly distributed around the axis of the movable nut, and a guide rod is inserted into the guide hole. The components providing power such as a motor provide power to the rope wheel to rotate, and the rope wheel rotates to start winding the wire rope, and the wire rope is arranged in the thread grooves by the movable nut, and the movable nut slides along the guide rod during the rotation of the rope wheel.

[0011] Furthermore, a limiting hole with an inner diameter larger than the inner diameter of the screw wheel is provided on the inner circumference of the movable nut, the limiting hole is located on one side of the screw wheel, and the guide hole is close to the limiting hole. The guide rod installed in the guide hole can be infinitely close to the wire rope but does not touch the wire rope, ensuring that the wire rope wound in the thread groove can be better curled, preventing its tension from expanding, and making it retractable and releaseable.

[0012] Furthermore, the guide hole is connected to the limit hole, so that the guide rod can be infinitely close to the wire rope but not contact the wire rope.

[0013] Furthermore, a receiving hole with an inner diameter larger than the limiting hole is provided on the inner circumference of the movable nut, the receiving hole and the screw wheel are respectively located on both sides of the limiting hole, one end of the rope wheel is fixedly connected with a protective cover, the protective cover protrudes with a fixed ring toward the rope wheel, and the fixed ring is embedded in the receiving hole. The provision of the receiving hole can better increase the travel of the wire rope.

[0014] Furthermore, the end of the rope pulley close to the protective cover has a notch, the notch is smoothly connected to the end of the thread groove, and the fixed ring covers the first circle of the thread groove.

[0015] Furthermore, the number of the guide holes is two, three or four.

[0016] Compared with the prior art, the technical effects of the present invention are:

[0017] 1. This scheme uses a whole circle of mobile nut that is integrally arranged, and a circle of screw wheels, rope threading holes, limiting holes and accommodating holes are arranged on the inner circumference of the mobile nut so that the wire rope can be more accurately received in the thread groove, thereby preventing the wire rope from jumping out and preventing the phenomenon of empty circles and occupied circles of the wire rope. A circle of wire rope is provided in one thread groove, and the stroke of the wire rope is increased on the pulley with the same axial length, thereby reducing the waste of the wire rope. When the stroke of the wire rope is constant, the axial length of the pulley can also be reduced, the weight of the pulley can be reduced, and the efficiency of the whole machine can be improved. Furthermore, by arranging the rope threading hole and the pressure wheel assembly, the wire rope can be straightened, thereby ensuring that the wire rope will not be affected by its tension when it is retracted, thereby making the wire rope retraction smoother.

[0018] 2. This pressure wheel assembly is more convenient for disassembling and replacing the roller, and allows a certain adjustment space for the contact between the roller and the wire rope.

[0019] 3. By setting the guide hole close to the limit hole, the guide rod after installation has a guiding function and also prevents the wire rope from jumping out of the thread groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a cross-sectional view Figure 1 .

[0021] Figure 2 The present invention is a cross-sectional view Figure 2 .

[0022] Figure 3 The movable nut of the present invention is three-dimensional Figure 1 .

[0023] Figure 4 The movable nut of the present invention is three-dimensional Figure 2 .

[0024] Figure 5 It is a stereogram of the present invention.

[0025] Figure 6 It is a three-dimensional diagram of a rope pulley of the present invention.

[0026] Figure 7 The present invention is a three-dimensional pressure wheel assembly Figure 1 .

[0027] Figure 8 The present invention is a three-dimensional pressure wheel assembly Figure 2 .

[0028] Figure number marking: 1. rope pulley; 101. threaded groove; 102. notch; 2. wire rope; 3. movable nut; 301. screw wheel; 302. rope threading hole; 302a. inner hole; 303. mounting hole; 304. strip pin hole; 305. fixing hole three; 306. guide hole; 307. limiting hole; 308. accommodating hole; 4. pressure wheel assembly; 401. roller; 402. pin shaft; 403. pressure plate; 403a. vertical plate; 403b. parallel plate; 403c. fixing hole one; 403d. fixing hole two; 404. rotating shaft; 405. fastener; 5. guide rod; 6. protective cover; 601. fixing ring. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] according to Figures 1 to 8 As shown, a device for preventing a wire rope from jumping out comprises a rope wheel 1 and a wire rope 2. The outer peripheral surface of the rope wheel 1 has a thread groove 101. The outer peripheral surface of the rope wheel 1 is sleeved with a movable nut 3. The movable nut 3 is a complete one-piece molded part. The inner peripheral surface of the movable nut 3 is protrudingly provided with a circle of screw wheel 301. The screw wheel 301 is spirally driven with the thread groove 101. For the convenience of description, the end of the movable nut 3 close to the starting end of the wire rope 2 is called the outer end, and the end away from the starting end of the wire rope 2 is called the inner end. A circle of the screw wheel 301 also has an outer end and an inner end, and there is a certain pitch between the outer end and the inner end of the screw wheel 301. A rope threading hole 302 is arranged on the movable nut 3 along the tangential direction of the screw wheel 301, and the inner hole 302a of the rope threading hole 302 is aligned with one end of the screw wheel 301, that is, the inner hole 302a of the rope threading hole 302 is aligned with the outer end of the screw wheel 301, and a mounting hole 303 is arranged on the movable nut 3 along the radial direction of the screw wheel 301. The axis of the mounting hole 303 is perpendicular to the axis of the rope threading hole 302 and is connected, and a pressure wheel assembly 4 is arranged in the mounting hole 303.

[0031] The movable nut 3 is provided with guide holes 306 uniformly distributed around the axis of the movable nut 3, and a guide rod 5 is inserted into the guide holes 306. The motor or other power-providing components provide power to the rope wheel 1 to rotate, and the rope wheel 1 rotates to start winding the wire rope 2, and the wire rope 2 is arranged in the thread grooves 101 by the movable nut 3. The movable nut 3 slides along the guide rod 5 during the rotation of the rope wheel 1. The preferred guide holes 306 have two, three or four.

[0032] A limiting hole 307 having an inner diameter greater than that of the screw wheel 301 is provided on the inner circumferential surface of the movable nut 3, the limiting hole 307 is located on one side of the screw wheel 301, and the guide hole 306 is close to the limiting hole 307. The guide hole 306 is connected with the limiting hole 307. The guide rod 5 installed in the guide hole 306 can be infinitely close to the steel wire rope 2 but does not contact the steel wire rope 2, so as to ensure that the steel wire rope 2 wound in the thread groove 101 can be better curled, prevent its tension from expanding, and make it retractable and releaseable.

[0033] The inner circumference of the movable nut 3 is provided with a receiving hole 308 whose inner diameter is larger than the limiting hole 307. The receiving hole 308 and the screw wheel 301 are respectively located on both sides of the limiting hole 307. A protective cover 6 is fixedly connected to one end of the rope wheel 1. The protective cover 6 protrudes a fixed ring 601 toward the rope wheel 1, and the fixed ring 601 is embedded in the receiving hole 308. The setting of the receiving hole 308 can better increase the stroke of the wire rope 2. The end of the rope wheel 1 close to the protective cover 6 has a notch 102, and the notch 102 is smoothly connected to the end of the thread groove 101, and the fixed ring 601 covers the first circle of the thread groove 101.

[0034] The mounting hole 303 passes through the moving nut 3, and the pressure wheel assembly 4 includes a roller 401, a pin 402 and a pressure plate 403. The pin 402 passes through the roller 401 and is fixed to the pressure plate 403. The roller 401 is located in the mounting hole 303 and contacts the wire rope 2, and the pressure plate 403 is fixed to the moving nut 3. The mounting hole 303 is a strip-shaped hole, and the moving nut 3 is also provided with a strip-shaped pin hole 304 that crosses the mounting hole 303, and both ends of the pin 402 abut against the bottom of the strip-shaped pin hole 304. The pressure plate 403 includes an integrally formed vertical plate 403a and a parallel plate 403b. The two ends of the vertical plate 403a are respectively provided with a fixing hole 1 403c and a fixing hole 2 403d. The pin 402 is fixed to the fixing hole 1 403c. The mobile nut 3 has a fixing hole 305. The fixing hole 2 403d and the fixing hole 305 are provided with a rotating shaft 404. The parallel plate 403b covers the outer circumference of the mobile nut 3 and is fixed by a fastener 405. The pressure plate 403 rotates around the rotating shaft 404, which can facilitate the disassembly of the roller 401. The pressure wheel assembly 4 is easy to install, and the pressure wheel assembly 4 ensures that the wire rope 2 has a certain amount of movement margin to ensure the smooth retraction and release of the wire rope 2.

[0035] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A wire rope jump prevention device, comprising a rope wheel (1) and a wire rope (2), wherein the outer peripheral surface of the rope wheel (1) has a thread groove (101), characterized in that: A full circle of movable nut (3) is sleeved on the outer circumference of the rope wheel (1), a circle of screw wheel (301) is arranged on the inner circumference of the movable nut (3), the screw wheel (301) and the screw groove (101) are spirally driven, a rope threading hole (302) is arranged on the movable nut (3) along the tangential direction of the screw wheel (301), the inner hole (302a) of the rope threading hole (302) is aligned with one end of the screw wheel (301), a mounting hole (303) is arranged on the movable nut (3) along the radial direction of the screw wheel (301), the axis of the mounting hole (303) is perpendicular to the axis of the rope threading hole (302) and is connected, and a pressure wheel assembly (4) is arranged in the mounting hole (303); The movable nut (3) is provided with guide holes (306) uniformly distributed circumferentially around the axis of the movable nut (3), and a guide rod (5) is inserted into the guide hole (306); A limiting hole (307) having an inner diameter greater than that of the screw wheel (301) is provided on the inner circumferential surface of the movable nut (3), the limiting hole (307) being located on one side of the screw wheel (301), and the guide hole (306) being close to the limiting hole (307); The inner circumferential surface of the movable nut (3) is provided with a receiving hole (308) whose inner diameter is larger than the limiting hole (307); the receiving hole (308) and the screw wheel (301) are respectively located on two sides of the limiting hole (307); one end of the rope wheel (1) is fixedly connected to a protective cover (6); the protective cover (6) is provided with a fixing ring (601) protruding toward the rope wheel (1); and the fixing ring (601) is embedded in the receiving hole (308).

2. The device for preventing a steel wire rope from jumping out according to claim 1, characterized in that: The mounting hole (303) passes through the movable nut (3); the pressure wheel assembly (4) comprises a roller (401), a pin shaft (402) and a pressure plate (403); the pin shaft (402) passes through the roller (401) and is fixed to the pressure plate (403); the roller (401) is located in the mounting hole (303) and contacts the steel wire rope (2); and the pressure plate (403) is fixed to the movable nut (3).

3. The wire rope jump-out prevention device according to claim 2, characterized in that: The mounting hole (303) is in the shape of a strip hole, and the movable nut (3) is also provided with a strip pin hole (304) spanning the mounting hole (303), and both ends of the pin shaft (402) are located in the strip pin hole (304).

4. The device for preventing a steel wire rope from jumping out according to claim 3, characterized in that: The pressure plate (403) comprises an integrally formed vertical plate (403a) and a parallel plate (403b), the two ends of the vertical plate (403a) respectively having a fixing hole one (403c) and a fixing hole two (403d), the pin shaft (402) being fixed to the fixing hole one (403c), the movable nut (3) having a fixing hole three (305), a rotating shaft (404) passing through the fixing hole two (403d) and the fixing hole three (305), and the parallel plate (403b) covering the outer circumference of the movable nut (3) and being fixed by a fastener (405).

5. The device for preventing a steel wire rope from jumping out according to claim 1, characterized in that: The guide hole (306) is communicated with the limiting hole (307).

6. The device for preventing a steel wire rope from jumping out according to claim 1, characterized in that: The rope wheel (1) has a notch (102) at the end close to the protective cover (6), and the notch (102) is smoothly connected to the end of the thread groove (101), and the fixing ring (601) covers the first circle of the thread groove (101).

7. The device for preventing a steel wire rope from jumping out according to claim 1, characterized in that: The number of the guide holes (306) is two, three or four.

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