A reliable winch

Abstract

The invention provides a reliable winch, comprising a motor, a transmission shaft, a reduction mechanism, a drum, a steel wire rope, a bracket, an overload limiter, a controller and a counter. The motor output shaft and the reduction mechanism are connected by transmission through the transmission shaft, the reduction mechanism is connected by transmission with the drum to drive the steel wire rope to be wound on the drum, the overload limiter comprises a first coupling, a second coupling, a first friction plate, a second friction plate and an adjusting member, the load on the steel wire rope is P1, the friction force between the first friction plate and the second friction plate is P2, the adjusting member can adjust P2, when P1≤P2, the first friction plate drives the second friction plate to rotate synchronously, when P1>P2, the first friction plate and the second friction plate rotate relatively to disconnect the connection between the motor output shaft and the transmission shaft, the counter measures the disconnection times N1 of the overload limiter, the controller is provided with a preset times N2, when N1≥N2, it indicates that P2 needs to be readjusted, the controller controls the motor to cut off power, and the reliability of the winch is improved.

Description

Technical Field

[0001] The invention relates to the technical field of winches, and in particular to a winch that is reliable in use. Background Art

[0002] A winch is a traction device for self-protection of vehicles and ships. It can be used for self-rescue and rescue in harsh environments such as snow, swamps, deserts, and beaches. It also has the ability to clear obstacles, drag objects, and install facilities. It is an essential safety device for outdoor sports. The current winch does not have a load limit function. It continues to pull even when the load is very large, making the winch parts easily damaged, resulting in winch failure and unreliable use of the winch. Summary of the invention

[0003] The object of the present invention is to provide a winch which is reliable in use.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a reliable winch, including a motor, a transmission shaft, a reduction mechanism, a drum, a wire rope and a bracket, the motor output shaft and the reduction mechanism are connected by the transmission shaft, the reduction mechanism is connected to the drum to drive the wire rope to be wound on the drum, the winch also includes an overload limiter, a controller and a counter, the overload limiter includes a first coupling rotating synchronously with the motor output shaft, a second coupling rotating synchronously with the transmission shaft, a first friction plate rotating synchronously with the first coupling, and a second friction plate rotating synchronously with the second coupling. The load on the wire rope is P1, the friction between the first friction plate and the second friction plate is P2, when P1≤P2, the first friction plate drives the second friction plate to rotate synchronously, when P1>P2, the first friction plate and the second friction plate rotate relative to each other to disconnect the connection between the motor output shaft and the transmission shaft, the counter is arranged on the overload limiter and measures the disconnection times N1 of the overload limiter, the counter is electrically connected to the controller, and a preset times N2 is set in the controller, when N1≥N2, the controller controls the motor to cut off the power.

[0005] Furthermore, the adjusting member includes a spring and a stop plate, the spring is sleeved on the first coupling and presses the first friction plate and the second friction plate, the stop plate is sleeved on the first coupling and can move axially along the first coupling to adjust the pressing force of the spring on the first friction plate and the second friction plate.

[0006] Furthermore, the first coupling is provided with an external thread, the stop plate is provided with an internal thread, and the first coupling and the stop plate are connected via threads.

[0007] Furthermore, the spring is a disc spring, a pressure plate is provided between the disc spring and the stop plate, and the stop plate presses the disc spring through the pressure plate.

[0008] Furthermore, the counter includes a first speed sensor for measuring the speed of the first coupling and a second speed sensor for measuring the speed of the second coupling. When the speed measured by the second speed sensor is less than the speed measured by the first speed sensor, the overload limiter is disconnected once.

[0009] Furthermore, the first coupling and the second coupling form a mounting cavity in the radial direction, and the first friction plate and the second friction plate are located in the mounting cavity.

[0010] Furthermore, the first friction plate and the second friction plate are provided in plurality, and the first friction plate and the second friction plate are adjacently and spaced apart.

[0011] Furthermore, the winch also includes a warning light, and the warning light is on when the number of disconnections is greater than or equal to a preset number of times.

[0012] Furthermore, the reduction mechanism includes a housing and a primary gear shaft, a primary gear, a secondary gear shaft, a third-stage sun gear, a third-stage planetary gear and a fourth-stage planetary gear located inside the housing; the transmission shaft is drivingly connected to the primary gear shaft and drives the primary gear, the secondary gear shaft, the third-stage sun gear, the third-stage planetary gear and the fourth-stage planetary gear to rotate in turn; the fourth-stage planetary gear is drivingly connected to the reel; the third-stage planetary gear and the fourth-stage planetary gear are both provided with needle roller bearings with inner rings.

[0013] Furthermore, the outer surface of the third-stage sun gear cooperates with the inner wall of the housing through a deep groove ball bearing, and the inner surface cooperates with the first-stage gear shaft through a thrust ball bearing.

[0014] After adopting the above technical solution, the present invention has the following advantages:

[0015] 1. By setting an overload limiter, when the load on the wire rope is greater than the friction between the first friction plate and the second friction plate, the first friction plate and the second friction plate rotate relative to each other, and the drum cannot continue to rotate, so that the capstan is in a load-stopped state, avoiding fatigue damage to the parts of the capstan due to excessive load, making the use of the capstan safer and more reliable; at the same time, after the first friction plate and the second friction plate have rotated relative to each other several times, the contact surface is prone to wear, so that the friction between the first friction plate and the second friction plate is reduced. By setting a counter, the number of disconnections of the overload limiter is measured, that is, the number of overloads of the capstan is counted. When the number of overloads is greater than or equal to the preset number, it means that the friction between the first friction plate and the second friction plate needs to be readjusted. The controller controls the motor to cut off the power, reminding the staff to readjust the friction between the first friction plate and the second friction plate through the adjustment member, so that the load that the capstan can pull will not decrease with the increase of the number of overloads, further improving the reliability of the use of the capstan.

[0016] 2. The adjusting part includes a spring and a stop plate. The spring presses the first friction plate and the second friction plate to ensure that the first friction plate and the second friction plate are in close contact. The deformation of the spring can be adjusted by adjusting the axial position of the stop plate on the first coupling, and then the pressing force of the spring acting on the first friction plate and the second friction plate can be adjusted, so that the friction force between the first friction plate and the second friction plate can be adjusted, thereby adjusting the load capacity of the winch.

[0017] 3. The first coupling is connected to the stop plate by threads, and the adjustment operation of the stop plate position is relatively simple; at the same time, because the threads are self-locking, the connection between the stop plate and the first coupling is relatively reliable, thereby ensuring the fixing effect of the stop plate on the spring.

[0018] 4. The spring is a disc spring, which requires a small axial space and can provide a large clamping force with a small deformation. It also has a large rigidity and is reliable to use. A pressure plate is provided between the disc spring and the stop plate. The stop plate squeezes the disc spring through the pressure plate, making the squeezing of the disc spring more uniform and reliable.

[0019] 5. By setting the first speed sensor and the second speed sensor, when the speed measured by the second speed sensor is less than the speed measured by the first speed sensor, it means that relative rotation occurs between the first friction plate and the second friction plate, the load on the wire rope is overloaded, and the overload limiter is disconnected once.

[0020] 6. The first coupling and the second coupling form an installation cavity in the radial direction, and the first friction plate and the second friction plate are located in the installation cavity, so that the first friction plate can cooperate with the outer surface of the first coupling so that the first friction plate and the first coupling rotate synchronously, and the second friction plate can cooperate with the inner surface of the second coupling so that the second friction plate and the second coupling rotate synchronously, making the structure of the overload limiter more compact.

[0021] 7. By arranging a plurality of first friction plates and second friction plates, the first friction plates and the second friction plates are arranged adjacent to each other at intervals, thereby increasing the overall friction force and improving the load that the winch can tow.

[0022] 8. By setting a warning light, when the number of disconnections is greater than the preset number, it means that the friction between the first friction plate and the second friction plate needs to be readjusted. The warning light is on to remind the staff to readjust the clamping force of the spring through the adjustment part.

[0023] 9. By arranging inner ring needle bearings on the third-stage planetary gear and the fourth-stage planetary gear, the transmission stability of the third-stage planetary gear and the fourth-stage planetary gear is improved to prevent jamming. At the same time, it is not easy to wear, thereby improving the durability of the third-stage planetary gear and the fourth-stage planetary gear, thereby making the reduction mechanism more stable and reliable.

[0024] 10. The outer surface of the three-stage sun gear is matched with the inner wall of the box through a deep groove ball bearing, and the inner surface is matched with the first-stage gear shaft through a thrust ball bearing, which has better wear resistance and avoids the movement of the three-stage sun gear due to long-term wear, thus ensuring the stability of the three-stage sun gear transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described below in conjunction with the accompanying drawings:

[0026] Figure 1 It is a schematic structural diagram of the winch of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the overload limiter in the winch of the present invention.

[0028] Figure 3 It is a front view of the first coupling in the winch of the present invention.

[0029] Figure 4 It is a top view of the first coupling in the winch of the present invention.

[0030] Figure 5 It is a schematic structural diagram of the first friction plate in the winch of the present invention.

[0031] Figure 6 It is a schematic diagram of the structure of the second coupling in the winch of the present invention.

[0032] Figure 7 It is a schematic structural diagram of the second friction plate in the winch of the present invention.

[0033] Figure 8 It is a schematic structural diagram of the speed reduction mechanism in the winch of the present invention.

[0034] The names of the components in the figure are as follows:

[0035] 1. Motor; 2. Transmission shaft; 3. Speed ​​reduction mechanism; 31. Box; 32. Primary gear shaft; 33. Primary gear; 34. Secondary gear shaft; 35. Third-stage sun gear; 351. Deep groove ball bearing; 352. Thrust ball bearing; 36. Third-stage planetary gear; 37. Fourth-stage planetary gear; 38. Needle roller bearing with inner ring; 4. Reel; 5. Wire rope; 6. Bracket; 7. Overload limiter; 71. First coupling; 711. Positioning surface; 72. Second coupling; 721. Internal gear; 73. First friction plate; 731. Limiting surface; 74. Second friction plate; 741. External gear; 742. Chip removal groove; 75. Disc spring; 76. Stop plate; 77. Pressure plate. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0037] like Figure 1 and Figure 2 As shown, the present invention provides a reliable winch, including a motor 1, a transmission shaft 2, a reduction mechanism 3, a drum 4, a wire rope 5 and a bracket 6. The output shaft of the motor 1 and the reduction mechanism 3 are connected by transmission through the transmission shaft 2, and the reduction mechanism 3 is connected by transmission with the drum 4. When the winch is working, the motor 1 drives the transmission shaft 2 to rotate and drives the drum 4 to rotate after deceleration through the reduction mechanism 3 to drive the wire rope 5 to be wound on the drum 4. The winch also includes an overload limiter 7, a controller and a counter. The overload limiter 7 includes a first coupling 71 that rotates synchronously with the output shaft of the motor, a second coupling 72 that rotates synchronously with the transmission shaft 2, a first friction plate 73 that rotates synchronously with the first coupling 71, a second friction plate 74 that rotates synchronously with the second coupling 72, and an adjusting member. The load on the wire rope is P1, and the friction between the first friction plate and the second friction plate is P2. The adjusting member can adjust the size of P2, P1≤P2, the first friction plate 73 drives the second friction plate 74 to rotate synchronously, P1>P 2. The first friction plate 73 and the second friction plate 74 rotate relative to each other to disconnect the connection between the motor output shaft and the transmission shaft 2. The drum 4 cannot continue to rotate, so that the capstan is in a load-stopped state, avoiding fatigue damage to the parts of the capstan due to excessive load, making the use of the capstan safer and more reliable; after the first friction plate 73 and the second friction plate 74 rotate relative to each other several times, the contact surface is prone to wear, so that the friction between the first friction plate 73 and the second friction plate 74 is reduced, and the counter is set on the overload limiter 7 and measures the disconnection number N1 of the overload limiter 7, that is, the overload number of the capstan is counted. The counter is electrically connected to the controller, and a preset number N2 is set in the controller. When N1≥N2, it means that the friction between the first friction plate and the second friction plate needs to be readjusted. The controller controls the motor to cut off the power and reminds the staff to readjust P2 through the adjustment member, so that the load that the capstan can pull will not decrease with the increase of the overload number, further improving the reliability of the use of the capstan.

[0038] In this embodiment, the adjusting member includes a spring and a stop plate 76. The spring is specifically a disc spring 75. The disc spring 75 requires a small axial space and can provide a large clamping force with a small deformation. At the same time, it has high rigidity and is reliable to use. The disc spring 75 is sleeved on the first coupling 71 and presses the first friction plate 73 and the second friction plate 74 to ensure that the first friction plate 73 and the second friction plate 74 are in close contact. The stop plate 76 is sleeved on the first coupling 71 and can move axially along the first coupling 71. The deformation of the disc spring can be adjusted, and then the clamping force of the disc spring on the first friction plate and the second friction plate can be adjusted, so that the friction between the first friction plate and the second friction plate can be adjusted, thereby adjusting the load capacity of the winch.

[0039] The first coupling 71 is provided with an external thread, and the stop plate 76 is provided with an internal thread. The first coupling 71 and the stop plate 76 are connected by threads, and the adjustment operation of the position of the stop plate 76 is relatively simple. At the same time, because the threads are self-locking, the connection between the stop plate and the first coupling is relatively reliable, thereby ensuring the fixing effect of the stop plate on the spring.

[0040] A pressure plate 77 is provided between the disc spring 75 and the stop plate 76 . The stop plate 76 presses the disc spring 75 through the pressure plate 77 , so that the pressing of the disc spring 75 is more uniform and reliable.

[0041] The counter includes a first speed sensor for measuring the speed of the first coupling 71 and a second speed sensor for measuring the speed of the second coupling 72. When the speed measured by the second speed sensor is less than the speed measured by the first speed sensor, it indicates that relative rotation occurs between the first friction plate 73 and the second friction plate 74, and the load on the wire rope 5 is overloaded, and the overload limiter 7 is disconnected once. Both the first speed sensor and the second speed sensor adopt MP-992 ultra-small electromagnetic speed sensor.

[0042] The first coupling 71 and the second coupling 72 form an installation cavity in the radial direction, and the first friction plate 73 and the second friction plate 74 are located in the installation cavity, so that the first friction plate 73 can cooperate with the outer surface of the first coupling 71 so that the first friction plate 73 and the first coupling 71 rotate synchronously, and the second friction plate 74 can cooperate with the inner surface of the second coupling 72 so that the second friction plate 74 and the second coupling 72 rotate synchronously, making the structure of the overload limiter 7 more compact.

[0043] Specific, combined Figures 3 to 7The outer surface of the first coupling 71 is provided with a positioning surface 711, and the inner wall of the first friction plate 73 is provided with a limiting surface 731 that matches the positioning surface 711. The positioning surface 711 and the limiting surface 731 cooperate to make the first friction plate 73 rotate synchronously with the first coupling 71; the inner wall of the second coupling 72 is provided with an internal gear 721, and the second friction plate 74 is provided with an external gear 741 that matches the internal gear 721. The internal gear 721 and the external gear 741 cooperate to make the second friction plate 74 rotate synchronously with the second coupling 72. The second friction plate 74 is provided with a chip removal groove 742 to facilitate chip removal.

[0044] There are multiple first friction plates 73 and second friction plates 74, which are arranged adjacent to each other at intervals to increase the overall friction force and improve the load that the winch can pull. In this embodiment, there are three first friction plates 73 and three second friction plates 74.

[0045] The winch also includes a warning light. When the number of disconnections is greater than or equal to a preset number of times, it indicates that the friction between the first friction plate and the second friction plate needs to be readjusted. The warning light is on to remind the staff to readjust the compression force of the spring through the adjustment part.

[0046] like Figure 8 As shown, the reduction mechanism 3 includes a housing 31 and a primary gear shaft 32, a primary gear 33, a secondary gear shaft 34, a third-stage sun gear 35, a third-stage planetary gear 36 and a fourth-stage planetary gear 37 located in the housing 31. The transmission shaft 2 is connected to the primary gear shaft 32 and drives the primary gear 33, the secondary gear shaft 34, the third-stage sun gear 35, the third-stage planetary gear 36 and the fourth-stage planetary gear 37 to rotate in sequence. The fourth-stage planetary gear 37 is connected to the reel 4. The third-stage planetary gear 36 and the fourth-stage planetary gear 37 are both provided with a needle roller bearing 38 with an inner ring, which improves the stability of the transmission of the third-stage planetary gear 36 and the fourth-stage planetary gear 37 and prevents them from getting stuck. At the same time, they are not easy to wear, thereby improving the durability of the third-stage planetary gear 36 and the fourth-stage planetary gear 37, thereby making the reduction mechanism 3 more stable and reliable to use.

[0047] The outer surface of the third-stage sun gear 35 cooperates with the inner wall of the box body 31 through a deep groove ball bearing 351, and the inner surface cooperates with the first-stage gear shaft 32 through a thrust ball bearing 352. The deep groove ball bearing 351 and the thrust ball bearing 352 have better wear resistance, which can prevent the third-stage sun gear 35 from moving due to long-term wear, thereby ensuring the stability of the transmission of the third-stage sun gear 35.

[0048] It is understandable that the number of the first friction plate and the second friction plate may be 1, 2, 4, 5, etc.

[0049] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined by the claims attached to the present invention.

Claims

1. A reliable winch, comprising a motor, a transmission shaft, a speed reduction mechanism, a drum, a wire rope and a bracket, wherein the motor output shaft and the speed reduction mechanism are connected by the transmission shaft, and the speed reduction mechanism is connected by the drum to drive the wire rope to be wound on the drum, characterized in that: The winch also includes an overload limiter, a controller and a counter. The overload limiter includes a first coupling that rotates synchronously with the motor output shaft, a second coupling that rotates synchronously with the transmission shaft, a first friction plate that rotates synchronously with the first coupling, a second friction plate that rotates synchronously with the second coupling, and an adjusting member that adjusts the friction between the first friction plate and the second friction plate. The load on the wire rope is P1, and the friction between the first friction plate and the second friction plate is P2. When P1≤P2, the first friction plate drives the second friction plate to rotate synchronously. When P1>P2, the first friction plate and the second friction plate rotate relative to each other to disconnect the motor output shaft. The counter is provided on the overload limiter and measures the disconnection times N1 of the overload limiter. The counter is electrically connected to the controller. The controller is provided with a preset number N2. When N1≥N2, the controller controls the motor to cut off the power. The counter comprises a first speed sensor for measuring the rotation speed of the first coupling and a second speed sensor for measuring the rotation speed of the second coupling. When the rotation speed measured by the second speed sensor is less than the rotation speed measured by the first speed sensor, the overload limiter is disconnected once. The first coupling and the second coupling form an installation cavity in the radial direction. The first friction plate and the second friction plate are located in the installation cavity.

2. The winch according to claim 1, characterized in that The adjusting member includes a spring and a stop plate. The spring is sleeved on the first coupling and presses the first friction plate and the second friction plate. The stop plate is sleeved on the first coupling and can move axially along the first coupling to adjust the pressing force of the spring on the first friction plate and the second friction plate.

3. The winch according to claim 1, characterized in that The first coupling is provided with an external thread, the stop plate is provided with an internal thread, and the first coupling is connected to the stop plate through threads.

4. The winch according to claim 2, characterized in that The spring is a disc spring, and a pressure plate is arranged between the disc spring and the stop plate, and the stop plate presses the disc spring through the pressure plate.

5. The winch according to claim 1, characterized in that There are a plurality of the first friction plates and the second friction plates, and the first friction plates and the second friction plates are adjacently and spaced apart.

6. The winch according to claim 1, characterized in that The winch also includes a warning light, which lights up when the number of disconnections is greater than or equal to a preset number of times.

7. The winch according to claim 1, characterized in that The reduction mechanism includes a housing and a primary gear shaft, a primary gear, a secondary gear shaft, a third-stage sun gear, a third-stage planetary gear and a fourth-stage planetary gear located inside the housing. The transmission shaft is connected to the primary gear shaft and drives the primary gear, the secondary gear shaft, the third-stage sun gear, the third-stage planetary gear and the fourth-stage planetary gear to rotate in turn. The fourth-stage planetary gear is connected to the drum, and the third-stage planetary gear and the fourth-stage planetary gear are both provided with needle roller bearings with inner rings.

8. The winch according to claim 7, characterized in that The outer surface of the three-stage sun gear is matched with the inner wall of the box through a deep groove ball bearing, and the inner surface is matched with the first-stage gear shaft through a thrust ball bearing.

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