Vehicle-mounted constant tension electric winch

Abstract

The application relates to a vehicle-mounted constant-tension electric winch, a rotatable intermediate gear is arranged on the right side of a frame, a power take-off device is arranged on the frame, a motor output shaft on the power take-off device is connected with input shafts of two speed reducers, the speed reducers are driven by the motor to transmit power, front and rear friction rollers are respectively sleeved on the two speed reducers, the front and rear friction rollers are driven by the two speed reducers to move at the same speed, and a rope storage cylinder is further driven to rotate, a passive gear is arranged on the right side of the rope storage device, a differential mechanism is arranged on the right side of the passive gear, one end of a steel wire rope is fixed on the rope storage device, and the middle section of the steel wire rope is sequentially wound on the rope storage device, the rear friction roller and the front friction roller. The electric winch has compact structure and simple control, the two speed reducers are driven by the motor to transmit power, the front and rear friction rollers are further driven to rotate, constant traction can be output, and the rope can be stably and reliably wound and unwound under the load.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of winch, and particularly relates to a vehicle-mounted constant-tension electric winch for vehicle-mounted rescue operation. BACKGROUND

[0002] The electric winch is a traction device for self-protection of vehicles or ships. The electric winch can be installed on military engineering vehicles, trailers, rescue vehicles and various rescue and repair vehicles, and can also be installed on civilian engineering vehicles, rescue vehicles, trailers, wrecker vehicles and engineering machinery, and is used for rescue operation on vehicles that are overturned, rolled over, fallen into a ditch, sunk and lost self-help ability, and can also be used for self-rescue of the vehicle itself. The existing vehicle-mounted winch is mainly driven by hydraulic drive, and is assembled by a hydraulic oil tank, a hydraulic pump, a hydraulic motor and an oil pipe. The control is complex, the operation condition is poor, the hydraulic pipeline is thick and many, and the winch of this form requires a large space in the vehicle to be arranged, the vehicle-mounted performance is limited, and the rope is unstable under load, so that a constant traction force cannot be output, affecting the traction work of the winch.

[0003] At present, new energy vehicles have become the future development trend, and rescue and repair vehicles are also gradually developing towards new energy vehicles. As an essential part of rescue and repair vehicles, the existing vehicle-mounted winch cannot be completely applicable to new energy vehicles, which restricts the development of rescue and repair vehicles towards new energy vehicles. SUMMARY

[0004] The technical problem to be solved by the application is to overcome the shortcomings of the prior art, and to provide a vehicle-mounted constant-tension electric winch. The electric winch integrates the power take-off device and the rack, has a compact structure and simple control, and can output a constant traction force by driving the two speed reducers through the motor to drive the front and rear friction rollers to rotate. The winch has an overload protection function, and can ensure stable and reliable operation of the rope under load.

[0005] To achieve the above-mentioned purpose, the technical scheme adopted by the application is as follows: a vehicle-mounted constant-tension electric winch, which comprises a rack, a power take-off device, a front friction roller, a rear friction roller, a rope storage device, a steel wire rope and a rope arranging device.

[0006] A rotatable intermediate gear is installed on the right side of the rack.

[0007] The power take-off device is installed on the rack, and the power take-off device comprises a motor and two speed reducers. The motor is installed in the middle of the power take-off device, and the two speed reducers are installed on the two sides of the motor. The output shaft of the motor is connected with the input shafts of the two speed reducers, and the speed reducers are driven by the motor for power transmission.

[0008] The front friction roller and the rear friction roller are installed at the front of the frame and are sleeved on the two speed reducers respectively, the right sides of the front friction roller and the rear friction roller are rotatably connected to the right side of the frame, the front friction roller and the rear friction roller are driven to move at the same speed by the two speed reducers respectively, a driving gear is installed at the right side of the rear friction roller, and the driving gear is engaged with the intermediate gear.

[0009] The rope storage device is rotatably installed at the rear of the frame and is used for winding the steel wire rope, a driven gear is installed at the right side of the rope storage device, the driven gear is engaged with the intermediate gear, a ratchet gear is arranged between the driven gear and the rope storage device, a differential mechanism is arranged at the right side of the driven gear, and a first transmission gear is installed at the left side of the rope storage device.

[0010] One end of the steel wire rope is fixed on the rope storage device, the middle section of the steel wire rope is sequentially wound on the rope storage device, the rear friction roller and the front friction roller, and the free end of the steel wire rope is connected with a hanging component.

[0011] The rope arranging device is installed at the top of the frame, a second transmission gear is installed at the left side of the rope arranging device, the first transmission gear is engaged with the second transmission gear, and the rope arranging device is driven to work by the rope storage device and the transmission gears.

[0012] The vehicle-mounted constant-tension electric winch further comprises that the left side of the power taking device is integrated with the left plate of the frame, the power taking device is fixed on the bottom plate of the frame through a key groove, a positioning pin and bolts, a motor input port and two power taking ports are arranged at the left side of the power taking device, the motor input port is arranged in the middle of the power taking device, the two power taking ports are arranged on the two sides of the motor input port, the motor is installed at the motor input port, and the two speed reducers are installed at the two power taking ports through bolts respectively.

[0013] The vehicle-mounted constant-tension electric winch further comprises that the motor is a high-voltage motor with small volume, large power density and high control precision, and the motor is fixed on the motor input port of the power taking device through a stop port and bolts.

[0014] The vehicle-mounted constant-tension electric winch further comprises that the ratchet gear is sleeved on the shaft of the rope storage device through a copper sleeve.

[0015] The vehicle-mounted constant-tension electric winch further comprises that the differential mechanism comprises a friction force transmission sleeve and a friction force transmission device, the friction force transmission sleeve is installed on the ratchet gear through bolts, the friction force transmission device is arranged on the inner wall of the friction force transmission sleeve and is connected to the shaft of the rope storage device through splines, a butterfly spring is sleeved on the shaft of the rope storage device at the right side of the friction force transmission device and is fixed through a lock nut.

[0016] The aforementioned vehicle-mounted constant tension electric winch further includes 6-10 sets of friction plates in the friction transmission device.

[0017] Furthermore, in the aforementioned vehicle-mounted constant tension electric winch, the front friction drum and the rear friction drum have the same diameter. The front friction drum and the rear friction drum are respectively bolted onto the two reducers. The shafts at the right ends of the front friction drum and the rear friction drum are respectively mounted on the right side of the frame via bearings.

[0018] In the aforementioned vehicle-mounted constant tension electric winch, the front friction drum, rear friction drum, and rope storage drum are arranged vertically and parallel on the frame.

[0019] In the aforementioned vehicle-mounted constant tension electric winch, the steel wire rope is wound in a single layer on the front half of the circumferential surface of the front friction drum and the rear half of the circumferential surface of the rear friction drum.

[0020] In the aforementioned vehicle-mounted constant tension electric winch, the attachment component is a hook or a ring, and the attachment component is connected to the free end of the wire rope by bolts, clamps, and nuts.

[0021] Based on the above technical solution, the present invention has at least the following advantages compared with the prior art:

[0022] 1. The power take-off device is integrated with the left side of the frame, resulting in a compact structure that saves installation space and reduces the size of the winch. The power take-off device can provide power to the winch and other onboard working devices at the same time, maximizing the utilization rate of the entire vehicle.

[0023] 2. The power take-off device uses a small-sized, high-power, and high-precision high-voltage motor. The motor drives two reducers to transmit force, which in turn drives the front and rear friction rollers to move at the same speed. It is simple to operate, has high control precision, and can output constant traction force.

[0024] 3. A differential speed mechanism is installed on the rope storage drum to control the winding speed of the rope storage drum, ensuring that the wire rope can be wound and unwound smoothly and reliably under load.

[0025] 4. It has an overload protection function. When the traction load exceeds the maximum load, the friction plates of the friction transmission device will slide relative to each other, thereby preventing damage to related components due to overload. Rotating the adjusting lock nut can change the pressure of the friction transmission device, thereby changing the maximum load and playing an overload protection role.

[0026] 5. The wire rope is wound in a single layer on the front half of the circumference of the front friction drum and the rear half of the circumference of the rear friction drum by the rope arranger, which effectively avoids the phenomena of rope misalignment, rope tangling and rope biting, and improves the work efficiency.

[0027] In summary, the vehicle-mounted constant-tension electric winch of the present invention has at least the aforementioned advantages and practical value. It is an innovation as no similar products have been publicly disclosed or used in the same category. It produces a user-friendly and practical effect, has improved technical effects compared with existing technologies, is more suitable for practical use, and has broad industrial value, making it suitable for promotion and application.

[0028] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show the embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the present invention;

[0031] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0032] Figure 3 This is a cross-sectional view of the differential mechanism in this invention;

[0033] Figure 4 This is a schematic diagram illustrating the working principle of the power take-off device in this invention;

[0034] Figure 5 This is an internal structural diagram of the power take-off device in this invention.

[0035] The attached diagram is labeled as follows: 1-Frame, 2-Motor, 3-Power take-off device, 4-Rope storage drum, 5-Front friction drum, 6-Rear friction drum, 7-Wire rope, 8-Rope arranger, 9-Driving gear, 10-Intermediate gear, 11-Passive gear, 12-Ratchet, 13-Copper sleeve, 14-Differential mechanism, 15-Friction transmission sleeve, 16-Friction transmission device, 17-Butterfly spring, 18-Lock nut, 19-Motor input port, 20-Power take-off port, 21-Reducer. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0038] In the description of this invention, it should be noted that the terms "upper", "lower", "left", "right", "front", "rear", "left side", "right side", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0040] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] like Figure 1 , Figure 2 The illustration shows a schematic embodiment of the vehicle-mounted constant tension electric winch provided by the present invention. In this schematic embodiment, the vehicle-mounted constant tension electric winch includes a frame 1, a power take-off device 3, a front friction drum 5, a rear friction drum 6, a rope storage device 4, a wire rope 7, and a rope arranger 8.

[0042] A rotatable intermediate gear 10 is installed on the right side of the frame 1. Specifically, an intermediate shaft with rotatable ends is installed on the right side of the frame 1, and the intermediate gear 10 is fixedly mounted on the intermediate shaft.

[0043] The power take-off device 3 is mounted on the frame 1, and the left side of the power take-off device 3 is integrated with the left side of the frame 1. The power take-off device 3 includes a motor 2 and two reducers 21. The motor 2 is mounted in the middle of the power take-off device 3, and the two reducers 21 are mounted on both sides of the motor 2. The output shaft of the motor 2 is connected to the input shaft of the two reducers 21, and the motor 2 drives the two reducers 21 to transmit power.

[0044] The front friction roller 5 and the rear friction roller 6 are installed at the front of the frame 1 and are respectively mounted on two reducers 21. The right sides of the front friction roller 5 and the rear friction roller 6 are rotatably connected to the right side of the frame 1. The two reducers 21 drive the front friction roller 5 and the rear friction roller 6 to move at the same speed. A drive gear 9 is installed on the right side of the rear friction roller 6. The drive gear 9 meshes with the intermediate gear 10.

[0045] The rope storage device 4 is rotatably mounted at the rear of the frame 1 at both ends via bearings and is used to wind the wire rope 7. A driven gear 11 is mounted on the right shaft of the rope storage device 4, and the driven gear 11 meshes with the intermediate gear 10. A ratchet 12 is mounted on the shaft between the driven gear 11 and the rope storage device 4. A differential mechanism 14 is mounted on the right shaft of the driven gear 11, and a first transmission gear is mounted on the left shaft of the rope storage device.

[0046] One end of the wire rope 7 is fixed to the rope storage device 4, and the middle section of the wire rope 7 is wound around the rope storage device 4, the rear friction roller 6, and the front friction roller 5 in sequence. The free end of the wire rope 7 is connected to a hook-on component.

[0047] The rope arranger 8 is installed on the top of the frame 1. A second transmission gear is installed on the left side of the rope arranger 8. The first transmission gear meshes with the second transmission gear, and drives the transmission gear and the rope arranger 8 through the rope storage drum 4.

[0048] The working principle of the vehicle-mounted constant-tension electric winch provided in this application embodiment is explained as follows:

[0049] 1) Rope release principle:

[0050] When rescue operations are needed, the wire rope 7 of the electric winch installed on the vehicle body is slowly pulled out, and the motor 2 on the power take-off device 3 is controlled to rotate forward. The output shaft of the motor 2 drives the two reducers 21 installed on both sides of it and the front friction drum 5 and the rear friction drum 6 installed on the reducers to rotate forward at the same speed. Since the driving gear 9 and the intermediate gear 10 and the driven gear 11 installed on the right side of the rear friction drum 6 mesh with each other, the rope storage drum 4 is driven to rotate in the same direction and at the same speed as the front friction drum 5 and the rear friction drum 6. The wire rope 7 wound on the rope storage drum 4 is pulled out at a uniform speed, realizing a smooth rope release.

[0051] 2) Rope winding principle:

[0052] During rescue operations, the connecting component at the free end of the wire rope 7 is connected to the vehicle or heavy object being rescued. The motor 2 on the power take-off device 3 is reversed. The output shaft of the motor 2 drives the two reducers 21 installed on both sides of it and the front friction roller 5 and the rear friction roller 6 installed on the reducers to rotate in opposite directions at the same speed. This, in turn, drives the rope storage drum 4 to rotate in the same direction at a uniform speed with the front friction roller 5 and the rear friction roller 6. Since the shaft of the rope storage drum 4 is equipped with a differential mechanism 14, the friction transmission device 16 of the differential mechanism 14 provides a tail end tension to the wire rope 7. Under the action of the tail end tension, the wire rope 7 generates friction through the front and rear friction rollers to lift the heavy object or pull the vehicle being rescued. It can also control the winding speed of the wire rope 7 on the rope storage drum 4. The wire rope 7 is evenly wound on the rope storage drum 8 through the rope arranger 8 to achieve smooth rope winding.

[0053] When the traction load exceeds the maximum load, relative sliding will occur between the friction plates of the friction transmission device 16, thereby preventing damage to related components due to overload. Rotating the adjusting lock nut 18 can change the pressure of the friction transmission device, thereby changing the maximum load and playing an overload protection role.

[0054] like Figure 4 , Figure 5 As shown, brakes K1 and K2 are integrated into the two reducers 21 of the power take-off device, while brake K3 is mounted on the transmission mechanism inside the left side plate of the frame 1, i.e., on the motor 2 of the power take-off device 3. When the vehicle-mounted constant-tension electric winch is working, brake K3 mounted on motor 2 engages, and brakes K1 and K2 on the two reducers 21 disengage. Motor 2 drives the two reducers 21 to transmit power, thereby driving the front and rear friction drums to move at a constant speed, outputting a constant traction force. When the vehicle-mounted constant-tension electric winch provides power to other on-board working devices, brake K3 mounted on motor 2 disengages, and brakes K1 and K2 on the two reducers 21 engage, allowing motor 2 to provide power to other on-board working devices.

[0055] Compared to existing technologies where vehicle-mounted electric winches require hydraulic drive, this embodiment integrates the frame and power take-off (PTO) into one unit, saving installation space and reducing the winch size. The PTO not only powers the winch but also other onboard work devices, maximizing the utilization of the entire vehicle. The motor transmits power to two reducers, which in turn drive the front and rear friction drums to move at a constant speed, outputting a constant traction force. This ensures the smoothness and reliability of the wire rope during winding and unwinding under load, and also avoids rope misalignment, tangling, and biting. This makes the structure of the vehicle-mounted electric winch relatively simple and the traction more reliable.

[0056] In the illustrative example of the vehicle-mounted constant-tension electric winch provided by this invention, the left side of the power take-off device 3 is integrated with the left side plate of the frame 1. This results in a compact structure, saves installation space, reduces the size of the winch, and allows the power take-off device to provide power to the winch while also powering other on-board work equipment, maximizing the utilization rate of the entire vehicle. The power take-off device 3 is fixed to the base plate of the frame 1 via keyways, positioning pins, and bolts. On the left side of the power take-off device 3, there is a motor input port 19 and two power take-off ports 20. The motor input port 19 is located in the middle of the power take-off device, and the two power take-off ports 20 are located on both sides of the motor input port 19. The motor 2 is mounted on the motor input port 19, and two reducers 21 are respectively mounted on the two power take-off ports 20 via bolts.

[0057] The number of power take-off ports 20 can be increased or decreased according to actual needs, and a corresponding number of reducers and friction rollers can be installed on the power take-off ports 20. Thus, when other onboard working devices consume more electricity, the number of power take-off ports 20 and corresponding reducers 21 and friction rollers can be appropriately reduced. When the electric winch needs to tow heavier vehicles or objects, the number of power take-off ports 20 and corresponding reducers 21 and friction rollers can be appropriately increased to increase the friction of the wire rope. In a preferred embodiment of the present invention, two power take-off ports are provided, but as an innovation of the present invention, it is not limited to providing two power take-off ports.

[0058] In the illustrative embodiment of the vehicle-mounted constant tension electric winch provided by the present invention, the motor 2 adopts a high-voltage motor with small size, high power density and high control precision, which improves the accuracy of the motor 2 in transmitting force to the reducer 21. The motor 2 is fixed to the motor input port on the power take-off device 3 through the stop and bolt.

[0059] In the illustrative embodiment of the vehicle-mounted constant tension electric winch provided by the present invention, the ratchet 11 is fitted onto the shaft on the right side of the rope storage drum 4 by a copper sleeve, which can ensure that the ratchet 11 maintains its stability during continuous rotation and is easy to replace when damaged.

[0060] In the illustrative example of the vehicle-mounted constant-tension electric winch provided by the present invention, the differential mechanism 14 includes a friction transmission sleeve 15 and a friction transmission device 16. The friction transmission sleeve 15 is bolted to the ratchet 11, and the friction transmission device 16 is mounted on the inner wall of the friction transmission sleeve 15 and connected to the shaft of the rope storage device 4 via a spline. A disc spring is fitted on the shaft of the rope storage device 4 on the right side of the friction transmission device 16 and fixed by a lock nut, which can effectively prevent the differential mechanism from loosening. Figure 3 As shown. By installing the differential mechanism 14, the winding speed of the rope storage drum 4 can be controlled, ensuring that the wire rope 7 operates smoothly and reliably when being wound and unwound under load. In addition, when the traction load exceeds the maximum load, relative sliding will occur between the friction plates of the friction transmission device 16, thereby preventing damage to related components due to overload. Rotating the adjusting lock nut 18 can change the pressure of the friction transmission device, thereby changing the maximum load and providing overload protection.

[0061] In the illustrative example of the vehicle-mounted constant tension electric winch provided by the present invention, the friction transmission device 16 is provided with 6-10 sets of friction plates, which can be easily replaced if damaged.

[0062] In the illustrative example of the vehicle-mounted constant tension electric winch provided by the present invention, the front friction drum 5 and the rear friction drum 6 have the same diameter. The front friction drum 5 and the rear friction drum 6 are respectively mounted on two reducers by bolts. The shafts at the right ends of the front friction drum 5 and the rear friction drum 6 are respectively mounted on the right side of the frame 1 by bearings. The reducer 21 drives the front friction drum 5 and the rear friction drum 6 to rotate smoothly and reliably on the frame 1.

[0063] In the illustrative example of the vehicle-mounted constant tension electric winch provided by the present invention, the front friction drum 5, the rear friction drum 6 and the rope storage drum 4 are arranged vertically and parallel on the frame 1. The front friction drum 5 and the rear friction drum 6 output a constant traction force, which facilitates the smooth winding of the wire rope 7 onto the rope storage drum 4.

[0064] In the illustrative example of the vehicle-mounted constant tension electric winch provided by the present invention, the wire rope 7 is wound in a single layer on the front half of the circumferential surface of the front friction drum 5 and the rear half of the circumferential surface of the rear friction drum 6. This effectively avoids the phenomenon of misaligned or tangled ropes and ensures the stability and reliability of the wire rope 7 in operation.

[0065] In the illustrative example of the vehicle-mounted constant tension electric winch provided by the present invention, the attachment component is a hook or a ring. The attachment component is connected to the free end of the wire rope by bolts, clamps, and nuts, which facilitates connection with the vehicle being rescued.

[0066] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0067] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vehicle-mounted constant tension electric winch, comprising a frame, a power take-off device, a front friction roller, a rear friction roller, a wire storage device, a steel wire rope and a wire arranging device, characterized in that: a rotatable intermediate gear is mounted on the right side of the frame; the left side plate of the frame is integrated with the left side of the power take-off device, a motor input port and two power take-off ports are arranged on the left side plate of the frame, the motor input port is arranged in the middle of the left side plate of the frame, and the two power take-off ports are arranged on the left and right sides of the motor input port; the power take-off device is fixed to the bottom plate of the frame through a key groove, a positioning pin and bolts, and comprises a motor and two reducers, the motor is installed at the motor input port, the motor is provided with a brake, the two reducers are respectively provided with a brake and are respectively installed at the two power take-off ports on the left and right sides of the motor through bolts, the output shaft of the motor is connected with the input shafts of the two reducers, and the motor drives the reducers to transmit power and drive; the front friction roller and the rear friction roller are installed on the front of the frame and are respectively sleeved on the two reducers, the right sides of the front friction roller and the rear friction roller are rotatably connected to the right side of the frame, the front friction roller and the rear friction roller are driven by the two reducers to move at the same speed, a driving gear is installed on the right side of the rear friction roller, and the driving gear is engaged with the intermediate gear; the wire storage device is rotatably installed on the rear of the frame and is used for winding the steel wire rope, a driven gear is installed on the right side of the wire storage device, the driven gear is engaged with the intermediate gear, a ratchet wheel is arranged between the driven gear and the wire storage device, the ratchet wheel is sleeved on the shaft of the wire storage device through a copper sleeve, a differential mechanism is arranged on the right side of the driven gear, the differential mechanism comprises a friction power transmission sleeve and a friction power transmission device, the friction power transmission sleeve is installed on the ratchet wheel through bolts, the friction power transmission device is arranged on the inner wall of the friction power transmission sleeve and is connected to the shaft of the wire storage device through splines, a butterfly spring is sleeved on the shaft of the wire storage device on the right side of the friction power transmission device and is fixed through a lock nut, 6-10 groups of friction plates are arranged in the middle of the friction power transmission device, and a first transmission gear is installed on the left side of the wire storage device; one end of the steel wire rope is fixed to the wire storage device, the middle section of the steel wire rope is sequentially wound on the wire storage device, the rear friction roller and the front friction roller, the steel wire rope is single-layer wound on the front half circumferential surface of the front friction roller and the rear half circumferential surface of the rear friction roller, and a hanging component is connected to the free end of the steel wire rope; the wire arranging device is installed on the top of the frame, a second transmission gear is installed on the left side of the wire arranging device, the first transmission gear is engaged with the second transmission gear, the transmission gear is driven by the wire storage device to drive the wire arranging device to work. The motor is a high-voltage motor with small volume, high power density and high control precision, and the motor is fixed to the motor input port of the power take-off device through a stop port and bolts. The diameters of the front friction roller and the rear friction roller are the same, the front friction roller and the rear friction roller are respectively sleeved on the two reducers through bolts, and the shafts at the right ends of the front friction roller and the rear friction roller are respectively installed on the right side of the frame through bearings. ​ ​ ​ ​ ​ 2. The on-board constant tension electric winch of claim 1, wherein: ​ 3. The on-board constant tension electric winch of claim 1, wherein: ​ 4. The on-board constant tension electric winch of claim 1, wherein: The front friction roller, the rear friction roller and the rope storage cylinder are vertically and parallel arranged on the frame.

5. The on-board constant tension electric winch of claim 1, wherein: The hanging component is a hook or a hanging ring, and the hanging component is connected to the free end of the steel wire rope by bolts, clamps or nuts.

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