Winch device for wrecker

Abstract

The utility model relates to the field of traffic safety, in particular to a winch device for a wrecker. A winch and a tensioning device are arranged on the wrecker, and a transmission device is arranged between the winch and the tensioning device; a steel wire rope is wound on the roller, and a rotating shaft is arranged in the middle of the roller; the tensioning device is provided with a roller A and a roller B which are horizontally arranged up and down, a gap is formed between the roller A and the roller B, the steel wire rope penetrates through the gap, the roller A and the roller B are in contact with the steel wire rope, the roller A is provided with a ratchet wheel one-way overrunning clutch, and the ratchet wheel one-way overrunning clutch is connected with a chain wheel B through a rotating shaft; a chain wheel A, a chain wheel B and a chain are arranged on the transmission device; power of rope releasing rotation of the winch is transmitted to the tensioning device through the transmission device, and the tensioning device receives force to tension the steel wire rope on the roller. The device solves the problem that the steel wire rope on the roller is disordered and loosened when the winch is used for winding and unwinding the rope.

Description

Technical Field

[0001] The utility model relates to the field of traffic safety, in particular to a winch device used on a tow truck. Background Art

[0002] The winch on the tow truck often has tangled ropes and loose ropes during use, which brings considerable safety hazards to the tow truck work. In response to the above problems, the applicant applied for two patents, "CN202123035296.5" and "CN202123039658.8", to solve the problem and made a physical object for use on the tow truck. However, it was found in use that it was indeed effective when collecting the rope, but when the winch was releasing the rope, it was necessary to use external force to pull it out tightly. If it was not pulled out tightly, the wire rope would be loosened on the drum, resulting in the failure to tighten the wire rope when collecting the rope. At the same time, the workers pulled the wire rope tightly outward, which was time-consuming and labor-intensive, and delayed the workers' work efficiency.

[0003] Therefore, it is necessary to design a device that uses the power of the winch to give the wire rope an outward pulling force when the winch is releasing the rope, so as to completely solve the problem of tangled and loose ropes on the winch of the tow truck. Utility Model Content

[0004] The present application provides a winch device for a tow truck, which adopts the following technical solution:

[0005] A winch device for a tow truck, wherein the tow truck is provided with a winch and a tensioning device, and a transmission device is provided between the winch and the tensioning device; the winch is provided with a drum, a steel wire rope is wound on the drum, and a rotating shaft is provided in the middle of the drum; the tensioning device is provided with a roller A and a roller B, the roller A and the roller B are horizontally arranged up and down, the roller A is provided with a rotating shaft, the rotating shaft is provided with a ratchet one-way overrunning clutch, a gap is provided between the roller A and the roller B, the steel wire rope passes through the middle of the roller A and the roller B, and the roller A and the roller B are in contact with the steel wire rope;

[0006] When the winch releases the rope, the ratchet one-way overrunning clutch rotates in the same direction as the drum. When the winch reels in the rope, the ratchet one-way overrunning clutch does not rotate.

[0007] Optionally, a transmission device is provided with a sprocket A and a sprocket B, and chains are provided on sprocket A and sprocket B. The power of the rope-releasing rotation of the winch is transmitted to the tensioning device through the transmission device, and the tensioning device tightens the wire rope on the drum by the force transmitted from the transmission device.

[0008] Optionally, a sprocket A is provided on one side of the rotating shaft of the drum, and a retracting and extending motor is provided on the other side.

[0009] Optionally, a rotating shaft is provided on the ratchet one-way overrunning clutch, and the rotating shaft is connected to the sprocket B.

[0010] Optionally, the rotating shaft of roller A, the ratchet one-way overrunning clutch and the sprocket B are coaxially mounted.

[0011] Optionally, the ratchet one-way overrunning clutch is provided with tooth grooves inside, a turntable is provided in the middle, a rotating shaft is provided on the turntable, a spring is provided on the side of the rotating shaft, one end of the spring is fixedly connected to the rotating shaft, and a pawl is provided on the other end of the spring, and the pawl fits with the tooth grooves in the ratchet one-way overrunning clutch.

[0012] Optionally, a roller regulator is provided on the tensioning device, and the roller regulator can adjust the distance between roller A and roller B. A rubber protective layer is provided on the surface of roller A and roller B.

[0013] Optionally, a rotating shaft is provided on roller B, a one-way bearing is provided on the rotating shaft, and the rotation direction of roller B is opposite to the rotation direction of roller A.

[0014] Optionally, the sprocket B changes its rotation direction, the rotating shaft rotates in the ratchet one-way overrunning clutch, and the roller A does not rotate.

[0015] Optionally, when the winch is retracting the rope, the rollers A and B on the tensioning device do not rotate, and the rollers A and B give a certain friction force to the recovered wire rope.

[0016] Compared with the prior art, the beneficial effects of the utility model are: a tensioning device is arranged in front of the winch, and a transmission device is arranged between the winch and the tensioning device. The force when the winch rotates is transmitted to the tensioning device through the transmission device. The tensioning device keeps the wire rope between the drum and the tensioning device in a tensioned state. When the drum retracts and releases the wire rope, it can ensure that the released and recovered wire rope is in a tight state, avoiding the situation where the wire rope on the winch is tangled or loose.

[0017] A ratchet one-way overrunning clutch is arranged between the sprocket on the tensioning device and the rotating shaft. The ratchet one-way overrunning clutch can be driven to rotate by the sprocket B on the transmission device when the drum releases the rope, and the roller A rotates to provide an outward pulling force to the wire rope to keep the wire rope tight. When the winch recycles the wire rope, the sprocket B on the transmission device will not cause the ratchet one-way overrunning clutch to rotate, and the roller A remains stationary. The friction of the roller A is applied to the wire rope when it is recycled, so that the recovered wire rope is also in a tight state. The existence of the tensioning device keeps the wire rope in a tight state on the drum when the rope is collected and released, avoiding the occurrence of tangled and loose wire ropes on the drum.

[0018] The ratchet one-way overrunning clutch can realize that roller A only rotates along the rotation direction of the drum when the rope is released through the internal rotating shaft. When the rotation direction changes, the rotating shaft only rotates inside the ratchet one-way overrunning clutch and will not drive the entire ratchet one-way overrunning clutch to rotate, so that the change of direction of the transmission device will not affect the rotation of roller A. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be discussed below. Obviously, the technical solutions described in conjunction with the drawings are only some embodiments of the utility model. For ordinary technicians in this field, other embodiments and their drawings can be obtained based on the embodiments shown in these drawings without paying creative work.

[0020] Figure 1 It is an overall schematic diagram of the utility model.

[0021] Figure 2 It is an overall schematic diagram of the winch of the utility model.

[0022] Figure 3 It is a schematic diagram of the transmission device of the utility model.

[0023] Figure 4 It is a front schematic diagram of the winch of the utility model.

[0024] Figure 5 It is a schematic diagram of a ratchet one-way overrunning clutch of the utility model.

[0025] Figure 6 It is an enlarged schematic diagram of the connection of the ratchet one-way overrunning clutch of the utility model.

[0026] Figure 7 A top view of the interior of a ratchet one-way overrunning clutch of the utility model.

[0027] Figure 8 The internal schematic diagram of the ratchet one-way overrunning clutch of the utility model.

[0028] In the figure: 1- roller, 2- wire rope, 3- sprocket A, 4- support plate, 5- chain, 6- sprocket B, 7- roller A, 8- roller B, 9- ratchet one-way overrunning clutch, 10- retractable motor, 11- rotating shaft, 12- spring, 13- ratchet, 14- rotating shaft, 15- roller adjuster, 20- tow truck. DETAILED DESCRIPTION

[0029] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the various embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of 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.

[0030] The embodiment of the utility model provides a winch device used on a tow truck.

[0031] Example 1: Figure 1-8 As shown, a winch device for a tow truck includes a tow truck 20, a winch is provided on the tow truck 20, a drum 1 is provided on the winch, a steel wire rope 2 is wound around the drum 1, a rotating shaft 11 is provided in the middle of the drum 1, two support plates 4 are provided at both ends of the rotating shaft 11, and the support plates 4 support the entire drum 1. A retractable motor 10 is provided on one side of the rotating shaft 11, and the retractable motor 10 controls the rotation of the drum 1, and a sprocket A3 is provided on the other side of the rotating shaft 11.

[0032] A tensioning device is arranged parallel to the front end of the drum 1. Two fixed plates are arranged on the tensioning device. A reinforcing rib plate is arranged at the bottom of the fixed plates. Roller A7 and roller B8 are arranged between the fixed plates. Roller A7 is arranged horizontally below roller B8. There is a gap between roller A7 and roller B8. The size of the gap is just enough to pass the wire rope 2 on the drum 1. Rotating shafts are arranged on both rollers. Both ends of the rotating shafts are arranged on the fixed plates on the tensioning device. The rotating shaft of roller A7 on one side extends out of the fixed plate. A ratchet one-way overrunning clutch 9 is arranged on the rotating shaft of roller A7. The ratchet one-way overrunning clutch 9 can rotate only in one fixed direction, so that roller A7 can rotate in one direction. A rotating shaft 14 is arranged on the ratchet one-way overrunning clutch 9. A sprocket B6 is arranged on the rotating shaft 14. The rotating shaft, ratchet one-way overrunning clutch 9 and sprocket B6 on roller A7 are coaxially installed. A one-way bearing is installed on the rotating shaft of roller B8, and roller B8 can only rotate in one direction, which is opposite to the rotating direction of roller A7. A rubber protective layer is provided on the surface of roller A7 and roller B8 to protect the surface of wire rope 2 during use. The tensioning device is provided with an inter-roller regulator 15, which can adjust the gap between rollers A7 and B8. The gap between the two rollers can be adjusted according to the actual situation of the wire rope to give the wire rope 2 a suitable force.

[0033] A transmission device is provided between the winch and the tensioning device, which can transmit the rotational force of the winch to the tensioning device to keep the wire rope 2 in a tensioned state. The sprocket A3 on the rotating shaft 11 and the sprocket B6 on the tensioning device are in a parallel state, and the sprocket A3 and the sprocket B6 are provided with a chain 5. The sprocket A3 rotates with the rotation of the drum 1. After the rotation, the sprocket A3 causes the sprocket B6 to rotate in the same direction through the chain 5.

[0034] The ratchet one-way overrunning clutch 9 is provided with tooth grooves inside, and a rotating disk is provided in the middle. The tooth grooves in the rotating disk ratchet one-way overrunning clutch 9 do not contact each other. A rotating shaft 14 is provided on the rotating disk. A spring 12 is provided on the side of the rotating shaft 14. One end of the spring 12 is fixedly connected to the rotating shaft 14. A ratchet pawl 13 is provided on the other end of the spring 12. The ratchet pawl 13 fits with the tooth grooves in the ratchet one-way overrunning clutch 9. The rotating shaft 12 is connected to the sprocket B6. Figure 7 As shown, when the rotating shaft 14 rotates clockwise, the pawl 13 will get stuck in the tooth groove, thereby driving the entire ratchet one-way overrunning clutch 9 to rotate, and the rotation of the ratchet one-way overrunning clutch 9 drives the rotation of the roller A7. When the rotating shaft 14 rotates in the opposite direction, the pawl 13 slides on the bevel of the groove. At this time, the distance between the pawl 13 and the rotating shaft 14 becomes shorter during the sliding process, compressing the spring 12, and the pawl 13 moves in a circle on the tooth groove. At this time, the entire ratchet one-way overrunning clutch 9 does not rotate, and only the rotating shaft 14 rotates inside the ratchet one-way overrunning clutch 9. At this time, the entire transmission device does not drive the tensioning device to rotate.

[0035] Working principle: When the winch releases the rope, it rotates and drives the sprocket A3 to rotate. The sprocket A3 drives the sprocket B6 to rotate in the same direction through the chain 5. At this time, the ratchet one-way overrunning clutch 9 installed coaxially with the sprocket B6 also rotates. The rotation of the ratchet one-way overrunning clutch 9 drives the roller A7 to rotate. The wire rope 2 between the roller A7 and the roller B8 is pulled outward faster by the force of the rotation of the roller A7 and the roller B8. This outward pulling force makes the section of the wire rope 2 between the drum 1 and the tensioning device always in a taut state. When the wire rope 2 is recovered to the drum 1, the retracting motor 10 controls the drum 1 to rotate in the opposite direction to recover the wire rope 2. At this time, the transmission device also starts to rotate in the opposite direction. Because the rotation direction of the ratchet one-way overrunning clutch 9 on the sprocket B6 is the same as the rotation direction when the rope is released, the rotation direction of the sprocket B6 when the rope is recovered is different from the ratchet one-way overrunning clutch 9. Therefore, when the rope is recovered, the sprocket B6 will not drive the ratchet one-way overrunning clutch 9 to rotate, so the roller A7 will not rotate. When the rope is recovered, the rotation direction of the roller B8 is the same as the one-way overrunning clutch 9 on the roller B8. The rotation direction of the bearing is different, and roller B8 will not rotate. At this time, roller A7 is in a stationary locked state, and roller B8 is also in a stationary locked state. At this time, when the recovered wire rope 2 passes between roller A7 and roller B8, roller A7 and roller B8 are fixed and do not rotate. Roller A7 and roller B8 provide friction to the surface of wire rope 2 when the wire rope 2 is recovered, increasing the force of the wire rope 2 to be recovered, thus ensuring that the wire rope 2 between the drum 1 and the tensioning device is also in a tensioned state to recover the wire rope 2. When the wire rope 2 is recovered, the rotation of the transmission device does not drive the ratchet one-way overrunning clutch 9 to rotate.

[0036] Embodiment 2: The ratchet one-way overrunning clutch 9 can be set as a one-way bearing, and other features are consistent with those of Embodiment 1.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view. The scope of the present invention is defined by the appended claims, rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0038] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A winch device for a tow truck, characterized in that: The tow truck (20) is provided with a winch and a tensioning device, and a transmission device is provided between the winch and the tensioning device; The winch is provided with a drum (1), a steel wire rope (2) is wound around the drum (1), and a rotating shaft (11) is provided in the middle of the drum (1); The tensioning device is provided with a roller A (7) and a roller B (8), which are arranged horizontally up and down, a rotating shaft is arranged on the roller A (7), a ratchet one-way overrunning clutch (9) is arranged on the rotating shaft, a gap is arranged between the roller A (7) and the roller B (8), and the steel wire rope (2) passes through the middle of the roller A (7) and the roller B (8), and the roller A (7) and the roller B (8) are in contact with the steel wire rope (2); When the winch releases the rope, the ratchet one-way overrunning clutch (9) rotates in the same direction as the drum (1); when the winch retracts the rope, the ratchet one-way overrunning clutch (9) does not rotate.

2. A winch device for a tow truck according to claim 1, characterized in that: The transmission device is provided with a sprocket A (3) and a sprocket B (6), and the sprocket A (3) and the sprocket B (6) are provided with a chain (5). The power of the rope-releasing rotation of the winch is transmitted to the tensioning device through the transmission device, and the tensioning device tightens the steel wire rope (2) on the drum (1) under the force transmitted by the transmission device.

3. A winch device for a tow truck according to claim 1, characterized in that: A sprocket A (3) is arranged on one side of the rotating shaft (11) of the drum (1), and a retracting and extending motor (10) is arranged on the other side.

4. A winch device for a tow truck according to claim 1, characterized in that: A rotating shaft (14) is provided on the ratchet one-way overrunning clutch (9), and the rotating shaft (14) is connected to the sprocket B (6).

5. The winch device for a tow truck according to claim 1, characterized in that: The rotating shaft on the roller A (7), the ratchet one-way overrunning clutch (9) and the sprocket B (6) are coaxially mounted.

6. A winch device for a tow truck according to claim 1, characterized in that: The ratchet one-way overrunning clutch (9) is provided with tooth grooves inside and a rotating disk is provided in the middle. A rotating shaft (14) is provided on the rotating disk. A spring (12) is provided on the side of the rotating shaft (14). One end of the spring (12) is fixedly connected to the rotating shaft (14). A ratchet pawl (13) is provided on the other end of the spring (12). The ratchet pawl (13) fits with the tooth grooves inside the ratchet one-way overrunning clutch (9).

7. A winch device for a tow truck according to claim 1, characterized in that: The tensioning device is provided with a roller regulator (15), which can adjust the distance between rollers A (7) and roller B (8). A rubber protective layer is provided on the surface of rollers A (7) and roller B (8).

8. The winch device for a tow truck according to claim 1, characterized in that: The roller B (8) is provided with a rotating shaft, and a one-way bearing is provided on the rotating shaft. The rotating direction of the roller B (8) is opposite to the rotating direction of the roller A (7).

9. The winch device for a tow truck according to claim 1, characterized in that: The sprocket B (6) changes its rotation direction, the rotating shaft (14) rotates in the ratchet one-way overrunning clutch (9), and the roller A (7) does not rotate.

10. A winch device for a tow truck according to claim 1, characterized in that: When the winch is retracting the rope, the roller A (7) and the roller B (8) on the tensioning device do not rotate, and the roller A (7) and the roller B (8) give a certain friction force to the retracted wire rope (2).

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