Dragging pulley

Abstract

The utility model discloses a dragging pulley, which relates to the field of hoisting equipment, is used for solving the problems that the existing dragging pulley is heavy in structure, inconvenient to disassemble and assemble and difficult to process, and comprises a pulley frame, a pulley body, a rotating shaft, a bearing plate and a connecting component, rotating shafts are arranged on the wheel frames; the pulley body is connected with the rotating shaft, and an opening is formed between one side face of the pulley body and the wheel frame and used for placing a cable on the pulley body. The bearing plate is of an integrated structure and is connected with the rotating shaft, so that the bearing plate can rotate relative to the wheel carrier, and the opening is opened or closed; and the bearing plate is detachably connected with the wheel carrier through a connecting assembly, so that the bearing plate is relatively fixed with the wheel carrier through the connecting assembly when the opening is closed. According to the dragging pulley, the cable is placed in by rotating the bearing plate, the bearing plate bears the acting force of the pulley, a connecting lug, a pin shaft and a turning plate do not need to be arranged, the connecting quality does not need to depend on the welding quality of the connecting lug and the connecting quality of the pin shaft, the structural reliability can be effectively improved, and the machining difficulty is reduced.

Description

Technical Field

[0001] The utility model relates to the field of hoisting equipment, in particular to a towing pulley. Background Art

[0002] The towing pulley is a pulley mechanism used when lifting objects, usually including a wheel frame and a wheel body mounted on the wheel frame. In order to insert the cable into the wheel body from the side of the wheel body and the opening of the wheel frame, the existing towing pulley usually installs a flap through a connecting ear and a pin shaft, and opens or closes the opening through the flap, wherein the connecting ear is welded to the wheel frame, the pin shaft is perpendicular to the axis of the pulley, and passes through the connecting ear and the flap, so that the flap can rotate around the pin shaft, thereby flipping up to close the opening, or flipping down to open the opening. When the flap opens the opening, the cable can be inserted between the wheel body and the wheel frame. The defects and shortcomings of the existing towing pulley are:

[0003] Since the flap and the connecting ear need to bear the force of the pulley when the towing pulley is working, and the connecting ear frame is welded and connected to the flap through a pin, this split connection structure is difficult to process, and the connection quality depends on the welding quality of the connecting ear and the connection quality of the pin, and it is easy to fail due to loose welding or wear and rust of the pin, and there is a problem of low reliability.

[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 resolved

[0006] The utility model provides a towing pulley, which at least solves the technical problem of how to improve structural reliability and reduce processing difficulty.

[0007] (II) Technical solution

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

[0009] A towing pulley comprises: a wheel frame, a pulley body, a rotating shaft, a bearing plate and a connecting assembly;

[0010] The wheel frame is provided with the rotating shaft; the pulley body is connected to the rotating shaft, and an opening is provided between one side of the pulley body and the wheel frame, and the opening is used to place a cable on the pulley body;

[0011] The load-bearing plate is an integral structure and is connected to the rotating shaft so that the load-bearing plate can rotate relative to the wheel frame to open or close the opening;

[0012] The load-bearing plate and the wheel frame are detachably connected via a connecting assembly, so that when the opening is closed, the load-bearing plate is relatively fixed to the wheel frame via the connecting assembly.

[0013] In some embodiments, the connecting assembly includes a pin and a nut, the load-bearing plate is provided with a first socket, and the wheel frame is provided with a second socket; the nut is detachably fixed to the wheel frame and is coaxially arranged with the second socket; the head of the pin is provided with a thread matching the nut, and the tail of the pin is provided with a cone, and the outer diameter of the cone gradually decreases toward the head; when the load-bearing plate closes the opening, the pin passes through the first socket and the second socket, the head is threadedly connected to the nut, and the cone abuts against the inner side of the first socket, so that the load-bearing plate and the wheel frame are relatively fixed.

[0014] In some embodiments, the nut is provided with a plurality of axially penetrating connection holes on the periphery of the internal thread, bolts are provided in the connection holes, and the nut is fixed to the wheel frame by the bolts.

[0015] In some embodiments, the connecting assembly includes a bushing, which is located on the inner side of the first socket, and the inner side of the bushing is a conical surface; when the load-bearing plate closes the opening, the pin passes through the bushing, and the cone contacts and cooperates with the conical surface.

[0016] In some embodiments, the bushing is made of copper alloy and is detachably fixed inside the first socket.

[0017] In some embodiments, the thread is a trapezoidal thread.

[0018] In some embodiments, the head of the latch is provided with a handle for rotation and plugging and unplugging operations, and the handle is provided with a through hole.

[0019] In some embodiments, a counterweight block is further included, and the counterweight block is symmetrically arranged on the top of the wheel frame with a vertical plane passing through the axis of the rotating shaft as the center.

[0020] In some embodiments, a cable guide roller group is further included, which is connected to the rotating shaft and is provided with an anti-slip groove for the cable.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the towing pulley provided by the utility model has the following beneficial effects:

[0023] When the towing pulley is releasing the cable, the load-bearing plate is first rotated to open the opening between the wheel frame and the pulley body, and the cable is placed on the pulley body from the opening; then, the load-bearing plate is rotated to close the opening, and the load-bearing plate is fixed to the wheel frame through the connecting assembly, so that the cable cannot be separated from the opening; compared with the existing towing pulley, the towing pulley of the utility model adopts the rotation of the load-bearing plate to open the opening, put in the cable, and the load-bearing plate with an integrated structure receives the force of the pulley, and there is no need to set connecting ears, pins and flaps, and the connection quality does not need to rely on the welding quality of the connecting ears and the connection quality of the pins, which can effectively improve the structural reliability; last but not least, the towing pulley does not need to weld ear plates and set pins, the structure is simplified, the processing difficulty is reduced, and the disassembly and assembly are more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the drag pulley in the embodiment when it is working.

[0025] Figure 2 This is a front view of the drag pulley in the embodiment when it is working.

[0026] Figure 3 for Figure 2 Cross-sectional view of section A.

[0027] Figure 4 It is a stereoscopic view of the drag pulley when releasing the cable in the embodiment.

[0028] Figure 5 2 is an exploded view of a connection assembly in an embodiment.

[0029] Figure numerals: wheel frame 1, pulley body 2, rotating shaft 3, load-bearing plate 4, connecting assembly 5, counterweight block 6, cable guide roller group 7, second socket 10, first socket 40, pin 51, nut 52, bushing 53, bolt 54, anti-slip groove 70, opening 100, thread 501, cone 502, connecting hole 503, handle 504. DETAILED DESCRIPTION

[0030] 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.

[0031] The connection quality of the existing towing pulley depends on the welding quality of the connection ear and the connection quality of the pin shaft, and has the problem of low reliability.

[0032] In order to solve the above technical problems, this embodiment provides a towing pulley, please refer to Figures 1 to 5 As shown, Figure 1 This is a three-dimensional diagram of the drag pulley in the embodiment when it is working. Figure 2 This is the front view of the drag pulley in the embodiment when it is working. Figure 3 for Figure 2The cross-sectional view of section A in the figure. Figure 4 It is a stereoscopic view of the drag pulley when releasing the cable in the embodiment.

[0033] The towing pulley of this embodiment includes: a wheel frame 1, a pulley body 2, a rotating shaft 3, a bearing plate 4 and a connecting assembly 5.

[0034] The wheel frame 1 is provided with a rotating shaft 3; the pulley body 2 is connected to the rotating shaft 3 and can rotate relative to the wheel frame 1, and an opening 100 is provided between one side of the pulley body 2 and the wheel frame 1, and the opening 100 is used to place the cable into the rope groove of the pulley body 2, that is, to insert the cable from the side of the pulley body 2; the load-bearing plate 4 is an integral structure and is connected to the rotating shaft 3, so that the load-bearing plate 4 can rotate relative to the wheel frame 1, thereby opening or closing the opening 100; the load-bearing plate 4 and the wheel frame 1 are detachably connected through the connecting assembly 5, so that when the opening 100 is closed, the load-bearing plate 4 is relatively fixed to the wheel frame 1 through the connecting assembly 5, and before it is necessary to open the opening 100 and insert the cable, the connecting assembly 5 can be removed so that the load-bearing plate 4 can rotate, and the opening 100 is opened by rotation.

[0035] When the towing pulley of the above technical solution is releasing the cable, the load-bearing plate 4 is first rotated to open the opening 100 between the wheel frame 1 and the pulley body 2, and the cable is placed on the pulley body 2 from the opening 100; then, the load-bearing plate 4 is rotated to close the opening 100, and the load-bearing plate 4 is fixed to the wheel frame 1 through the connecting assembly 5, so that the cable cannot be separated from the opening 100; compared with the existing towing pulley, the towing pulley of the above technical solution opens and closes the opening 100 through the load-bearing plate 4, and the load-bearing plate 4 with an integrated structure bears the force of the pulley, and there is no need to set connecting ears, pins and flaps. The connection quality does not need to rely on the welding quality of the connecting ears and the connection quality of the pins. It will not fail due to problems such as loose welding of the connecting ears and insufficient shear resistance of the pins, which can effectively improve the structural reliability and reduce the processing difficulty; last but not least, the towing pulley does not need to weld ear plates and set pins, the structure is simplified, the processing difficulty is reduced, and disassembly and assembly are more convenient.

[0036] In one embodiment of the above-mentioned connecting component 5, refer to Figure 3 and Figure 5 As shown, Figure 5This is an exploded view of the connecting component in the embodiment, the connecting component 5 includes a pin 51 and a nut 52, the load-bearing plate 4 is provided with a first socket 40, and the wheel frame 1 is provided with a second socket 10; the nut 52 is detachably fixed to the wheel frame 1 and is coaxially arranged with the second socket 10; the head of the pin 51 is provided with a thread 501 adapted to the nut 52, and the tail of the pin 51 is provided with a cone 502 whose outer diameter gradually decreases toward the head direction; when the load-bearing plate 4 closes the opening 100, the pin 51 passes through the first socket 40 and the second socket 10, and the head is connected to the nut 52 by the thread 501, so that the load-bearing plate 4 and the wheel frame 1 are relatively fixed and cannot rotate relative to each other, and the cone 502 abuts against the inner side of the first socket 40, which is conducive to generating axial force, making the thread 501 self-locking, and increasing the diameter of the shear position of the pin 51 while ensuring that the weight of the pin 51 is low, thereby improving the shear resistance.

[0037] For example, see Figure 3 As shown, the connecting assembly 5 also includes a bushing 53, and the conical portion 502 indirectly abuts against the inner side of the first socket 40 through the bushing 53. The bushing 53 is located on the inner side of the first socket 40, such as being tightly connected to the inner side of the first socket 40, and the inner side of the bushing 53 is a conical surface; when the load-bearing plate 4 closes the opening 100, the pin 51 passes through the bushing 53, and the conical portion 502 contacts and cooperates with the conical surface. The bushing 53 uses a conical surface to contact the conical portion 502 of the pin 51, which is convenient for disassembly on the one hand, and generates a large axial preload on the other hand, so as to realize self-locking of the pin 51, and at the same time can increase the friction between the load-bearing plate 4 and the wheel frame 1, so that the load-bearing plate 4 and the wheel frame 1 are fixed more firmly, and the shearing effect of the load-bearing plate 4 on the pin 51 during operation is reduced.

[0038] Exemplarily, the bushing 53 is made of copper alloy and is detachably fixed to the inside of the first plug hole 40 and can be replaced. It can prevent rust and compensate for coaxiality errors.

[0039] For example, see Figure 2 and Figure 5 As shown, the nut 52 is provided with a plurality of axially penetrating connecting holes 503 on the periphery of the internal thread, and bolts 54 are arranged in the connecting holes 503. The nut 52 is detachably fixed to the wheel frame 1 by the bolts 54. The wheel frame 1 is preset with threaded holes for the bolts 54. In this way, the plurality of connecting holes 503 cooperate with the threaded holes on the wheel frame 1 through the bolts 54, so as to play a positioning role, thereby preventing the internal thread of the nut 52 from being eccentric with the second socket 10 on the other side, which makes it difficult for the pin shaft 51 to penetrate. The nut 52 does not need to be disassembled after installation. In this way, the threads of the nut 52 and the pin 51 can be processed normally. Secondly, there is no need to ensure the coaxiality of the internal thread of the nut 52 and the second socket 10 in advance during processing, which is convenient for ensuring that the nut 52 and the second socket 10, the first socket 40 and the conical surfaces of the bushing 53 are coaxial with each other, further reducing the processing difficulty.

[0040] Exemplarily, the cone portion 502 directly abuts against the inner side of the first insertion hole 40 .

[0041] Exemplarily, the thread 501 is a trapezoidal thread, and the trapezoidal thread cooperates with the nut 52 to achieve a better self-locking effect.

[0042] For example, see Figure 3 As shown, the head of the latch 51 is provided with a handle 504 for rotation and plugging and unplugging operations, and the handle 504 is provided with a through hole, so that the latch 51 can be conveniently controlled through the handle 504. The through hole on the handle 504 can also be used to connect ropes and other auxiliary components for operating the latch 51.

[0043] To ensure that the cable follows the intended path on the pulley, refer to Figure 2 As shown, the towing pulley also includes a cable guide roller group 7, which is connected to the rotating shaft 3 and is provided with an anti-slip groove 70 for the cable. The inner side of the anti-slip groove 70 can be chamfered or the roller can be in contact with the cable to reduce friction with the cable.

[0044] In one embodiment in which a rotating shaft 3 is provided on the wheel frame 1 and the pulley body 2 and the load-bearing plate 4 are connected to the rotating shaft 3, the rotating shaft 3 passes through the wheel frame 1, the pulley body 2 and the load-bearing plate 4 in sequence, the pulley body 2 is located between the wheel frame 1 and the load-bearing plate 4, and a baffle, bolts and other fasteners are provided at the end of the rotating shaft 3 to avoid disengagement with the wheel frame 1 and the load-bearing plate 4.

[0045] 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 traction pulley, characterized in that: include: Wheel frame, pulley body, rotating shaft, load-bearing plate and connecting components; The wheel frame is provided with the rotating shaft; the pulley body is connected to the rotating shaft, and an opening is provided between one side of the pulley body and the wheel frame, and the opening is used to place a cable on the pulley body; The load-bearing plate is an integral structure and is connected to the rotating shaft so that the load-bearing plate can rotate relative to the wheel frame to open or close the opening; The load-bearing plate and the wheel frame are detachably connected via a connecting assembly, so that when the opening is closed, the load-bearing plate is relatively fixed to the wheel frame via the connecting assembly.

2. The traction pulley according to claim 1, characterized in that: The connecting assembly includes a latch and a nut, the load-bearing plate is provided with a first plug hole, and the wheel frame is provided with a second plug hole; The nut is detachably fixed on the wheel frame and is coaxially arranged with the second plug hole; the head of the plug is provided with a thread adapted to the nut, and the tail of the plug is provided with a cone, and the outer diameter of the cone gradually decreases toward the head; When the load-bearing plate closes the opening, the latch passes through the first insertion hole and the second insertion hole, the head is threadedly connected to the nut, and the cone abuts against the inner side of the first insertion hole, so that the load-bearing plate and the wheel frame are relatively fixed.

3. The traction pulley according to claim 2, characterized in that: The connecting assembly comprises a bushing, the bushing is located inside the first plug hole, and the inside of the bushing is a conical surface; When the bearing plate closes the opening, the latch passes through the bushing, and the tapered portion contacts and cooperates with the tapered surface.

4. The traction pulley according to claim 3, characterized in that: The bushing is made of copper alloy and is detachably fixed inside the first plug hole.

5. The traction pulley according to claim 2, characterized in that: The thread is a trapezoidal thread.

6. The traction pulley according to claim 2, characterized in that: The head of the latch is provided with a handle for rotation and plugging and pulling operations, and the handle is provided with a through hole.

7. The traction pulley according to claim 2, characterized in that: The nut is provided with a plurality of axially penetrating connection holes on the periphery of the internal thread, bolts are arranged in the connection holes, and the nut is fixed on the wheel frame by the bolts.

8. The traction pulley according to claim 1, characterized in that: It also includes a cable guide roller group, which is connected to the rotating shaft and is provided with an anti-drop groove for the cable.

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