Cable jumping prevention device of dragging pulley and dragging pulley

Abstract

The utility model discloses a cable jumping prevention device of a dragging pulley and the dragging pulley, relates to the field of hoisting equipment, and is used for solving the problem that when an existing dragging pulley works, a cable and a pulley groove of the pulley are prone to being abraded and separated from each other, and the cable jumping prevention device comprises a support, a fixed carrier roller, a movable carrier roller and a connecting piece. The bracket is arranged on the wheel carrier and can rotate around the pulley; the fixed carrier roller is fixedly connected with the bracket; the other end of the movable carrier roller is connected with the connecting piece; the connecting piece is detachably and fixedly connected with the bracket; the movable carrier roller and the fixed carrier roller surround to form an anti-disengaging hole, and the anti-disengaging hole and a pulley groove of the pulley are located in the same plane so that a cable in the pulley groove can pass through the anti-disengaging hole. The dragging pulley and the cable jumping prevention device can slow down abrasion of the cable and the pulley, reduce the risk that the cable is separated from the pulley groove, and have the advantage of being convenient to disassemble and assemble the cable.

Description

Technical Field

[0001] The utility model relates to the field of hoisting equipment, in particular to a cable jumping prevention device for a towing pulley and a towing pulley. Background Art

[0002] During the process of lifting objects, one end of the cable is fixed to the lifting object, and the other end is connected to the lifting equipment or other power source. When the lifting equipment starts working, it will pull the cable to make the cable slide on the pulley. Due to the action of the pulley, the direction of the cable's tension will change, allowing the hoisted object to be lifted or moved smoothly.

[0003] In application scenarios such as offshore lifting, such as when a scientific research vessel lifts underwater scientific research equipment and performs ocean towing operations, the movement of the hull and the action of the water flow often cause the cable to deviate to one side of the vertical plane. This deviation will cause the pulley to deflect under the tension of the cable. However, due to the deadweight of the pulley, it tends to return to the vertical state, which causes the cable outlet point of the pulley and the cable to no longer remain on the same horizontal plane. At this time, a deflection angle is formed between the cable and the pulley groove, causing unnecessary friction between the cable and the edge of the groove. This friction not only accelerates the wear of the cable and the groove and reduces the service life, but also when the deviation is serious, it may even cause a serious accident of the cable falling out of the groove, posing a serious threat to operational safety.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] 1. Technical issues to be solved

[0006] The utility model provides a cable jumping prevention device for a towing pulley and a towing pulley, which at least solves the technical problem of how to slow down the wear of the cable and the pulley and reduce the risk of the cable escaping from the wheel groove.

[0007] (II) Technical solution

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0009] A cable jumping prevention device for a towing pulley, the towing pulley comprising a wheel frame and a pulley rotatably arranged on the wheel frame;

[0010] The anti-cable jumping device comprises: a bracket, a fixed roller, a movable roller and a connecting piece;

[0011] The bracket is arranged on the wheel frame and can rotate around the pulley;

[0012] The fixed roller is fixedly connected to the bracket; one end of the movable roller is rotatably connected to the bracket, and the other end is connected to the connecting member; the connecting member is detachably fixedly connected to the bracket;

[0013] The movable roller and the fixed roller are surrounded to form an anti-drop hole, and the anti-drop hole and the wheel groove of the pulley are located in the same plane to allow the cable in the wheel groove to pass through.

[0014] In some embodiments, the movable roller includes a roller shaft and a roller cylinder rotatably mounted on the periphery of the roller shaft, one end of the roller shaft is rotatably connected to the bracket, and the other end is movably mounted on the connecting piece; the bracket is provided with a socket opposite to the position of the roller shaft, the connecting piece and the pin shaft pass through the socket and limit the rotation of the roller shaft around the bracket, the bracket is provided with an opening connected to the socket, the opening is used to block the connecting piece and allow the roller shaft to pass through; the roller shaft is provided with an anti-detachment ear pin, the anti-detachment ear pin is located on the side of the connecting piece away from the roller cylinder, and is used to prevent the connecting piece from detaching from the roller shaft.

[0015] In some embodiments, the connecting member includes a limiting ring, which is located on a side of the insertion hole away from the roller and contacts the bracket to limit the movement of the connecting member toward the roller.

[0016] In some embodiments, the bracket includes a pair of ear plates, a pin is provided between the ear plates, and the pin passes through one end of the roller shaft so that the roller shaft can rotate around the pin shaft.

[0017] In some embodiments, there are three fixed rollers and one movable roller; two of the fixed rollers are parallel to each other and spaced apart, the third fixed roller is parallel to the movable roller and spaced apart, and is perpendicular to the first two fixed rollers, thereby forming a square anti-drop hole.

[0018] In some embodiments, the pulley is connected to the wheel frame via a rotating shaft, and the anti-cable jumping device also includes a rotating arm, which is connected to the rotating shaft and is arranged in pairs on both sides of the pulley, and the end of the rotating arm extends to the periphery of the wheel groove of the pulley, and the bracket is fixed between the ends of the paired rotating arms.

[0019] The utility model also provides a towing pulley, comprising the above-mentioned anti-cable jumping device.

[0020] (III) Beneficial effects

[0021] Compared with the prior art, the anti-cable jumping device and the towing pulley provided by the utility model have the following features:

[0022] Beneficial effects:

[0023] When the towing pulley is working, after the cable passes through the wheel groove of the pulley, it passes through the anti-drop hole formed by the movable roller and the fixed roller. The anti-drop hole guides and limits the cable. When the cable deviates, the bracket can adaptively rotate around the pulley under the action of the cable. At the same time, since the anti-drop hole is located in the same plane as the wheel groove of the pulley, the deflection of the cable can be reduced, so that the pulley and the cable outlet points tend to be on the same plane, and the deflection angle between the cable and the wheel groove of the pulley is reduced, thereby reducing the friction between the cable and the edge of the wheel groove, and slowing down the wear of the cable and the wheel groove; at the same time, the limiting effect of the anti-drop hole on the cable can reduce or even avoid the risk of the cable escaping from the wheel groove; last but not least, since the connecting member and the bracket are detachably fixedly connected, when the connecting member and the bracket are disassembled, the movable roller can open the anti-drop hole by rotating to allow the cable to be put in and taken out, and the cable does not need to enter or escape from the anti-drop hole from the head, thereby improving the disassembly and assembly efficiency of the cable in the anti-drop hole.

[0024] It can be seen that the towing pulley and the anti-cable jumping device of the utility model can reduce the wear of the cable and the pulley, reduce the risk of the cable escaping from the wheel groove, and have the advantage of facilitating the disassembly and assembly of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional diagram of the drag pulley in the embodiment.

[0026] Figure 2 2 is a three-dimensional diagram of the anti-cable jumping device in the embodiment.

[0027] Figure 3 FIG. 4 is a top view of the drag pulley in the embodiment.

[0028] Figure 4 2. It is a bottom view of the anti-cable jumping device in the embodiment.

[0029] Figure 5 It is a three-dimensional view of the anti-cable jumping device in the embodiment when it is opened.

[0030] Reference numerals:

[0031] Wheel frame 1, pulley 2, wheel groove 20;

[0032] Anti-cable jumping device 3, bracket 31, fixed roller 32, movable roller 33, connecting piece 34, anti-drop ear pin 35, rotating arm 36, anti-drop hole 300, plug hole 301, opening 302, limiting ring 303, ear plate 310, roller shaft 331, roller 332. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0034] In existing towing pulley application scenarios such as offshore lifting, it is easy for a deviation angle to form between the cable and the pulley groove, causing unnecessary friction between the cable and the edge of the groove. This friction not only accelerates the wear of the cable and the groove and reduces its service life, but also when the deviation is severe, it may even cause serious accidents such as the cable falling out of the groove, posing a serious threat to operational safety.

[0035] In order to solve the above technical problems, this embodiment provides a cable jumping prevention device for a towing pulley, please refer to Figures 1 to 5 As shown, Figure 1 is a three-dimensional diagram of a drag pulley in an embodiment, Figure 2 is a three-dimensional diagram of the anti-cable jumping device in the embodiment, Figure 3 is a top view of the drag pulley in the embodiment, Figure 4 It is a bottom view of the anti-cable jumping device in the embodiment, Figure 5 It is a three-dimensional view of the anti-cable jumping device in the embodiment when it is opened.

[0036] The anti-cable jumping device of the towing pulley of this embodiment comprises a pulley frame 1 and a pulley 2 rotatably arranged on the pulley frame 1; the anti-cable jumping device 3 comprises: a bracket 31, a fixed roller 32, a movable roller 33 and a connecting piece 34.

[0037] The bracket 31 is arranged on the wheel frame 1, and serves as a mounting carrier for the fixed roller 32 and the movable roller 33. The bracket 31 can rotate around the pulley 2, that is, rotate around the pulley 2 as the center.

[0038] The fixed roller 32 is fixedly connected to the bracket 31, that is, the position of the fixed roller 32 on the bracket 31 remains unchanged; one end of the movable roller 33 is rotatably connected to the bracket 31, and the other end is connected to the connecting member 34, and the connecting member 34 is detachably fixedly connected to the bracket 31, that is, the other end of the movable roller 33 is detachably fixedly connected to the bracket 31 through the connecting member 34, and has a fixed state and a detached state relative to the bracket 31;

[0039] The movable roller 33 and the fixed roller 32 surround and form an anti-drop hole 300 , and the anti-drop hole 300 and the wheel groove 20 of the pulley 2 are located in the same plane to allow the cable in the wheel groove 20 to pass through.

[0040] When the towing pulley of the above technical solution is working, after the cable passes through the wheel groove 20 of the pulley 2, it will pass through the anti-drop hole 300 composed of the movable roller 33 and the fixed roller 32. The anti-drop hole 300 not only provides precise guidance and effective limiting for the cable, but also when the cable deviates, the bracket 31 can adaptively rotate around the pulley 2, thereby significantly reducing the deflection of the cable; it is worth mentioning that since the anti-drop hole 300 and the wheel groove 20 of the pulley 2 are in the same plane, this layout greatly reduces the deflection angle between the cable and the wheel groove 20 of the pulley 2, thereby greatly reducing the cable and The friction on the edge of the wheel groove 20 significantly reduces the wear of the cable and the wheel groove 20; in addition, the limiting effect of the anti-drop hole 300 on the cable significantly reduces the risk of the cable escaping from the wheel groove 20, ensuring the safety and stability of the operation; finally, the design also cleverly uses the detachable fixed connection method between the connecting piece 34 and the bracket 31, so that when the cable needs to be disassembled, the movable roller 33 can be opened by simply disassembling the connecting piece 34, so that the cable can be conveniently placed in or taken out of the anti-drop hole 300, without the need for tedious disassembly and assembly operations from the cable head, which greatly improves work efficiency.

[0041] In one embodiment of the movable roller 33 being detachably fixedly connected to the bracket 31 via the connecting member 34, see Figure 2 and Figure 4As shown, the movable roller 33 includes a roller shaft 331 and a roller 332 rotatably sleeved on the outer periphery of the roller shaft 331. The roller 332 is used to contact with the cable, so that the cable can roll smoothly when passing through the anti-drop hole 300, effectively reducing the friction between the cable and the roller, thereby extending the service life of the cable; one end of the roller shaft 331 is rotatably connected to the bracket 31, and the other end is movably sleeved with the connecting member 34; the bracket 31 is provided with a socket 301 opposite to the roller shaft 331, the connecting member 34 and the pin shaft pass through the socket 301, and limit the roller shaft 331 from rotating around the bracket 31, so as to keep the movable roller 33 in a fixed state; the bracket 31 is provided with a The opening 302 has a diameter smaller than the cross-sectional dimension of the connecting member 34 and is used to block the connecting member 34. Meanwhile, the diameter of the opening 302 is larger than the cross-sectional dimension of the roller 331 and can allow the roller 331 to pass through. The design of the opening 302 facilitates the roller 331 to exit the insertion hole 301 and enables the connecting member 34 to exit the insertion hole 301 without having to completely detach from the roller 331. Meanwhile, the roller 331 is provided with an anti-detachment ear pin 35, and the roller 331 is provided with a pin hole for the anti-detachment ear pin 35 to pass through. The anti-detachment ear pin 35 is located on the side of the connecting member 34 away from the roller 332 and is used to prevent the connecting member 34 from detaching from the roller 331 when the movable roller 331 is in a fixed state. When the anti-dropout hole 300 needs to be opened, the anti-dropout ear pin 35 only needs to be pulled out, and then the connecting piece 34 is moved along the axial direction of the roller shaft 331 and disengaged from the socket 301, and the roller shaft 331 can be rotated from the opening 302 to the outside of the socket 301, thereby opening the anti-dropout hole 300. This detachable fixed connection method has the advantages of reliable connection and easy disassembly.

[0042] For example, see Figure 2 and Figure 4 As shown, the connecting member 34 includes a limiting ring 303, which is fixed to the middle of the connecting member 34 by means of integral molding or the like. The limiting ring 303 is located on the side of the insertion hole 301 away from the roller 332, and contacts the bracket 31 to limit the movement of the connecting member 34 toward the roller 332. Together with the anti-slip ear pin 35, it can ensure the position of the connecting member 34 and the stability of the movable roller 33 in a fixed state. It can also be used as a positioning structure during installation. When the limiting ring 303 contacts the bracket 31, it means that the connecting member 34 is installed in place, which is beneficial to improving the installation efficiency.

[0043] For example, see Figure 2 As shown, the rotational connection between the roller 331 and the bracket 31 is achieved in the following manner: the bracket 31 includes a pair of ear plates 310, and the ear plates 310 can be welded to the sides of the bracket 31. A pin is provided between the ear plates 310, and the pin passes through a through hole reserved at one end of the roller 331 so that the roller 331 can rotate around the pin, thereby realizing the rotational connection between one end of the movable roller 33 and the bracket 31.

[0044] In another embodiment in which the movable roller 33 is detachably fixedly connected to the bracket 31 via a connecting member 34 , an end of the movable roller 33 is connected to the bracket 31 via a bolt or a buckle.

[0045] In one embodiment of the movable roller 33 and the fixed roller 32 surrounding and forming the anti-drop hole 300, see Figure 4 As shown, there are three fixed rollers 32 and one movable roller 33; two of the fixed rollers 32 are parallel to each other and spaced apart, the third fixed roller 32 is parallel to the movable roller 33 and spaced apart, and is perpendicular to the first two fixed rollers 32, thereby forming a square anti-drop hole 300.

[0046] In other embodiments of the movable rollers 33 and the fixed rollers 32 surrounding the anti-slip hole 300, the number of the fixed rollers 32 and the movable rollers 33 is set as needed, and based on the concept of the previous embodiment, a triangular, polygonal or irregular anti-slip hole 300 is formed around it.

[0047] In one embodiment, the bracket 31 is arranged on the wheel frame 1 and rotates around the pulley 2. Figure 1 and Figure 3 As shown, the pulley 2 is connected to the wheel frame 1 through a rotating shaft, and the anti-cable jumping device 3 also includes a rotating arm 36, which is connected to the rotating shaft and is arranged in pairs on both sides of the pulley 2. The ends of the rotating arms 36 extend to the periphery of the wheel groove 20 of the pulley 2, and the bracket 31 is fixed between the ends of the paired rotating arms 36. With such an arrangement, the rotating arms 36 can drive the bracket 31 to rotate around the rotating shaft, that is, to rotate around the pulley 2.

[0048] For example, see Figure 1 and Figure 3 As shown, two groups of brackets 31, fixed rollers 32, movable rollers 33 and connectors 34 are provided and are located on both sides of the pulley 2 respectively, for guiding and limiting the cable in the direction of entering the pulley 2 and the direction of outputting from the pulley 2.

[0049] In one implementation of the above-mentioned fixed roller 32 , the fixed roller 32 uses an existing roller, and both ends of the fixed roller are fixed to the bracket 31 by bolts.

[0050] This embodiment provides a towing pulley, see Figure 1 and Figure 3 As shown, it includes a wheel frame 1, a pulley 2 rotatably arranged on the wheel frame 1, and the above-mentioned anti-cable jumping device 3. Through the application of the above-mentioned anti-cable jumping device 3, the towing pulley of the utility model can reduce the wear of the cable and the pulley 2, reduce the risk of the cable escaping from the wheel groove 20, and has the advantage of convenient cable disassembly and assembly.

[0051] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cable jumping prevention device for a towing pulley, the towing pulley comprising a wheel frame and a pulley rotatably arranged on the wheel frame; characterized in that: The anti-cable jumping device comprises: a bracket, a fixed roller, a movable roller and a connecting piece; The bracket is arranged on the wheel frame and can rotate around the pulley; The fixed roller is fixedly connected to the bracket; one end of the movable roller is rotatably connected to the bracket, and the other end is connected to the connecting member; the connecting member is detachably fixedly connected to the bracket; The movable roller and the fixed roller are surrounded to form an anti-drop hole, and the anti-drop hole and the wheel groove of the pulley are located in the same plane to allow the cable in the wheel groove to pass through.

2. The cable jumping prevention device of the towing pulley according to claim 1, characterized in that: The movable roller comprises a roller shaft and a roller rotatably sleeved on the outer periphery of the roller shaft, one end of the roller shaft is rotatably connected to the bracket, and the other end is movably sleeved to the connecting member; The bracket is provided with a socket opposite to the roller shaft, the connecting piece and the pin shaft pass through the socket and limit the roller shaft from rotating around the bracket, and the bracket is provided with an opening connected with the socket, the opening is used to block the connecting piece and allow the roller shaft to pass through; The roller shaft is provided with an anti-dropping ear pin, and the anti-dropping ear pin is located at a side of the connecting member away from the roller, and is used to prevent the connecting member from being detached from the roller shaft.

3. The cable jumping prevention device of the towing pulley according to claim 2, characterized in that: The connecting member comprises a limiting ring, which is located at a side of the insertion hole away from the roller and contacts the bracket to limit the movement of the connecting member toward the roller.

4. The cable jumping prevention device of the towing pulley according to claim 2, characterized in that: The bracket comprises a pair of ear plates, a pin is arranged between the ear plates, and the pin passes through one end of the roller shaft so that the roller shaft can rotate around the pin.

5. The cable jumping prevention device of the towing pulley according to claim 1, characterized in that: There are three fixed rollers and one movable roller; two of the fixed rollers are parallel to each other and spaced apart, the third fixed roller is parallel to the movable roller and spaced apart, and is perpendicular to the first two fixed rollers, thereby forming a square anti-drop hole.

6. The cable jumping prevention device of the towing pulley according to claim 1, characterized in that: The pulley is connected to the wheel frame via a rotating shaft, and the anti-cable jumping device also includes a rotating arm, which is connected to the rotating shaft and is arranged in pairs on both sides of the pulley. The ends of the rotating arms extend to the periphery of the wheel groove of the pulley, and the bracket is fixed between the ends of the paired rotating arms.

7. A towing pulley, characterized in that: The anti-cable jumping device comprises the anti-cable jumping device according to any one of claims 1 to 6.

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