Winch

Abstract

The invention discloses a winch, which relates to the technical field of winch safety and comprises a winch frame, a winding drum, a ratchet wheel, a pawl, a driving device and an oil cylinder, the winding drum is rotatably connected to the winch frame around a first axis, the ratchet wheel is fixedly connected to one end of the winding drum, one end of the pawl is a claw-shaped part, and the other end of the pawl is a connecting part; the pawl between the claw-shaped part and the connecting part is rotatably connected to the winch frame around a second axis, the claw-shaped part corresponds to the ratchet wheel in position, the oil cylinder is horizontally arranged and fixedly connected to one side of the winch frame, one end of a piston rod of the oil cylinder is rotatably connected to the connecting part around a third axis, and the first axis, the second axis and the third axis are parallel to one another. According to the winch, heavy objects can be prevented from falling suddenly in an emergency state, and the safety is higher.

Description

Technical Field

[0001] The invention relates to the technical field of winch safety, in particular to a winch. Background Art

[0002] A winch is a mechanical device used to lift and pull heavy objects. Conventional hydraulic winches or electric winches modified from hydraulic winches are prone to encounter emergencies when the winch drum is not controlled by the hydraulic or electrical system during use. At this time, the winch drum will automatically release the rope under the gravity of the heavy object on the rope, causing the heavy object to fall suddenly, causing safety hazards. Therefore, a winch with stronger safety is urgently needed. Summary of the invention

[0003] The purpose of the present invention is to provide a winch to solve the problems existing in the above-mentioned prior art and improve the safety of the winch.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a winch, comprising: a winch frame, a drum, a ratchet, a pawl, a driving device and an oil cylinder, wherein the drum is connected to the winch frame by rotation around a first axis, the output end of the driving device is connected to the drum, the ratchet is fixedly connected to one end of the drum, one end of the pawl is a claw-shaped portion, and the other end is a connecting portion, the pawl between the claw-shaped portion and the connecting portion is connected to the winch frame by rotation around a second axis, the claw-shaped portion corresponds to the position of the ratchet, the oil cylinder is horizontally arranged and fixedly connected to one side of the winch frame, one end of the piston rod of the oil cylinder is connected to the connecting portion by rotation around a third axis, the first axis, the second axis and the third axis are parallel to each other, the piston rod of the oil cylinder can be extended or shortened to make the pawl rotate around the second axis, so that the claw-shaped portion is stuck on the ratchet or separated from the ratchet.

[0006] In some embodiments, the oil cylinder includes the piston rod, a cylinder sleeve and an elastic member, the piston rod includes a rod body and a plug body, one end of the rod body is fixedly connected to the plug body, and the other end is rotatably connected to the connecting part around a third axis, the plug body is arranged in the cylinder sleeve, and the cylinder sleeve is provided with an oil port connecting the rod cavity in the cylinder sleeve and the outside of the cylinder sleeve, and the end of the plug body facing away from the rod cavity has a limiting surface, one end of the elastic member abuts against the limiting surface, and the other end abuts against the inner wall of the cylinder sleeve.

[0007] In some embodiments, a control system and a hydraulic system are further included, wherein the control system is signal-connected to the hydraulic system, an output end of the hydraulic system is connected to the oil port, and the hydraulic system can increase or decrease the pressure of the hydraulic oil injected into the oil port under the control of the control system.

[0008] In some embodiments, the elastic member is a disc spring, and the disc spring is sleeved outside the plug body.

[0009] In some embodiments, the cylinder sleeve includes a front gland, a middle sleeve and a rear gland, and the front gland and the rear gland are detachably connected to two ends of the middle sleeve respectively.

[0010] In some embodiments, the plug body has an annular flange, and the annular side surface of the annular flange facing away from the rod cavity forms the limiting surface.

[0011] In some embodiments, the driving device is a motor.

[0012] In some embodiments, the ratchet is welded to one end of the reel.

[0013] In some embodiments, a planetary reducer is provided at one end of the reel away from the ratchet wheel, the ring gear of the planetary reducer is fixedly connected to the reel, and the output shaft of the motor is fixedly connected to the central axis of the planetary reducer.

[0014] In some embodiments, a pin shaft is further included, the axis of the pin shaft coincides with the second axis, one end of the pin shaft is fixedly connected to the pawl, and the other end is rotatably connected to one end of the piston rod.

[0015] Compared with the prior art, the present invention has achieved the following technical effects:

[0016] The winch provided by the present invention is that when the winch is operating normally, the piston rod of the oil cylinder is shortened and remains in the shortened state, the piston rod drives the pawl to rotate around the second axis and makes the toothed portion away from the ratchet, and the drum can rotate normally under the drive of the driving device; in an emergency state, the driving device fails, and at this time the piston rod of the oil cylinder can be extended, the pawl is rotated around the second axis, and the toothed portion is stuck on the ratchet, limiting the rotation of the drum, thereby preventing the heavy object at the lower end of the rope on the drum from falling suddenly, thereby improving the safety of the winch; moreover, compared with the oil cylinder with a certain inclination angle to the horizontal direction, the horizontally arranged oil cylinder has a lower center of gravity, is easy to install and is more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 is a three-dimensional structural diagram of a winch in some embodiments of the present invention;

[0019] Figure 2 A cross-sectional view of an oil cylinder in some embodiments of the present invention;

[0020] Figure 3 A side view of a winch in some embodiments of the present invention;

[0021] In the figure: 1. winch frame; 2. drum; 3. ratchet; 4. pawl; 5. oil cylinder; 6. cylinder sleeve; 7. rod body; 8. plug body; 9. oil port; 10. elastic member; 11. annular flange; 12. limiting surface; 13. front pressure cover; 14. intermediate sleeve; 15. rear pressure cover; 16. rod cavity; 17. driving device; 18. claw-shaped part; 19. connecting part; 20. pin shaft. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] The purpose of the present invention is to provide a winch to solve the problems existing in the above-mentioned prior art and improve the safety of the winch.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] The present invention provides a winch, such as Figure 1-3As shown, it includes: a winch frame 1, a drum 2, a ratchet 3, a pawl 4, a driving device 17 and a cylinder 5. The drum 2 is connected to the winch frame 1 by rotation around a first axis, the output end of the driving device 17 is connected to the drum 2, the ratchet 3 is fixedly connected to one end of the drum 2, one end of the pawl 4 is a claw-shaped portion 18, and the other end is a connecting portion 19. The pawl 4 between the claw-shaped portion 18 and the connecting portion 19 is connected to the winch frame 1 by rotation around a second axis, the claw-shaped portion 18 corresponds to the position of the ratchet 3, the cylinder 5 is horizontally arranged and fixedly connected to one side of the winch frame 1, one end of the piston rod of the cylinder 5 is connected to the connecting portion 19 by rotation around a third axis, the first axis, the second axis and the third axis are parallel to each other, the piston rod of the cylinder 5 can be extended or shortened to make the pawl 4 rotate around the second axis, so that the claw-shaped portion 18 is stuck on the ratchet 3 or separated from the ratchet 3.

[0026] The winch provided by the present invention is that when the winch is operating normally, the piston rod of the oil cylinder 5 is shortened and remains in the shortened state, the piston rod drives the pawl 4 to rotate around the second axis and makes the toothed portion away from the ratchet 3, and the drum 2 can rotate normally under the drive of the driving device 17; in an emergency state, the driving device 17 fails and the driving device 17 cannot control the rotation of the drum 2. At this time, the piston rod of the oil cylinder 5 can be extended, the pawl 4 is rotated around the second axis, and the toothed portion is stuck on the ratchet 3, limiting the rotation of the drum 2, thereby preventing the heavy object at the lower end of the rope on the drum 2 from falling suddenly, thereby improving the safety of the winch; moreover, compared with the oil cylinder 5 with a certain inclination angle to the horizontal direction, the horizontally arranged oil cylinder 5 has a lower center of gravity, is easy to install and is more stable.

[0027] In one implementation of the present embodiment, the oil cylinder 5 includes a piston rod, a cylinder sleeve 6 and an elastic member 10. The piston rod includes a rod body 7 and a plug body 8. One end of the rod body 7 is fixedly connected to the plug body 8, and the other end is rotatably connected to the connecting portion 19 around a third axis. The plug body 8 is arranged in the cylinder sleeve 6. The cylinder sleeve 6 is provided with an oil port 9 connecting the rod cavity 16 in the cylinder sleeve 6 and the outside of the cylinder sleeve 6. The end of the plug body 8 facing away from the rod cavity 16 has a limiting surface 12. One end of the elastic member 10 abuts against the limiting surface 12, and the other end abuts against the inner wall of the cylinder sleeve 6. When the winch is operating normally, hydraulic oil is injected into the rod chamber 16 through the oil port 9 and a certain injection pressure is maintained. The plug body 8 moves away from the pawl 4 and compresses the elastic member 10. The piston rod is retracted into the cylinder sleeve 6. The pawl 4 rotates and moves away from the ratchet 3. The drum 2 can rotate normally. In an emergency, the pressure of the injected hydraulic oil is reduced. The elastic force of the elastic member 10 is greater than the pressure of the oil. The elastic member 10 can stretch to move the plug body 8 toward the pawl 4, so that the oil is pressed out from the oil port 9, the rod body 7 stretches, and the pawl 4 can rotate and get stuck on the ratchet 3, thereby limiting the rotation of the drum 2. Among them, the elastic member 10 is arranged in the cylinder sleeve 6 to reduce the volume of the oil cylinder 5 and enhance the integrity.

[0028] In one embodiment of the present invention, the winch provided by the present invention further includes a control system and a hydraulic system, the control system is connected to the hydraulic system signal, the output end of the hydraulic system is connected to the oil port 9, and the hydraulic system can increase or decrease the pressure of the hydraulic oil injected into the oil port 9 under the control of the control system. Emergency situations generally include the following situations: First, when the winch is powered on, an emergency stop is required. At this time, the control system can be used to control the hydraulic system to reduce the oil injection pressure, so that the piston rod extends and the pawl 4 clamps the column ratchet 3; second, when the winch is suddenly powered off, the control system is shut down, and the pressure of the oil in the hydraulic system is reduced, which can also make the piston rod extend and clamp the ratchet 3 through the pawl 4.

[0029] In one implementation of this embodiment, the elastic member 10 is a disc spring, and the disc spring is sleeved outside the plug body 8. The disc spring has strong rigidity and a longer service life.

[0030] To facilitate installation and maintenance of the oil cylinder 5 , in one embodiment of the present invention, the cylinder sleeve 6 includes a front gland 13 , an intermediate sleeve 14 and a rear gland 15 , and the front gland 13 and the rear gland 15 are detachably connected to both ends of the intermediate sleeve 14 .

[0031] In one implementation of this embodiment, the plug body 8 has an annular flange 11, and the annular flange 11 is away from the annular side surface of the rod cavity 16 to form a limiting surface 12. The annular first limiting surface 12 can make the force of the elastic member 10 on the plug body 8 more uniform.

[0032] In one implementation of this embodiment, the driving device 17 is a motor.

[0033] In order to make the ratchet 3 more stably connected to the winch frame 1 , in one implementation of this embodiment, the ratchet 3 is welded to one end of the drum 2 .

[0034] In one embodiment of the present invention, a planetary reducer is provided at one end of the reel 2 away from the ratchet wheel 3, the ring gear of the planetary reducer is fixedly connected to the reel 2, and the output shaft of the motor is fixedly connected to the central axis of the planetary reducer. The planetary reducer can well enable the motor to control the speed of the reel 2, so that the reel 2 can accurately rotate a certain number of circles.

[0035] In order to facilitate the connection between the piston rod and the pawl 4, in one embodiment of this embodiment, the winch provided by the present invention also includes a pin 20, the axis of the pin 20 coincides with the second axis, one end of the pin 20 is fixedly connected to the pawl 4, and the other end is rotatably connected to one end of the piston rod.

[0036] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A winch, characterized in that: include: A winch frame, a drum, a ratchet, a pawl, a driving device and a cylinder, wherein the drum is connected to the winch frame by rotation around a first axis, the output end of the driving device is connected to the drum, the ratchet is fixedly connected to one end of the drum, one end of the pawl is a claw-shaped portion, and the other end is a connecting portion, the pawl between the claw-shaped portion and the connecting portion is connected to the winch frame by rotation around a second axis, the claw-shaped portion corresponds to the position of the ratchet, the cylinder is horizontally arranged and fixedly connected to one side of the winch frame, one end of the piston rod of the cylinder is connected to the connecting portion by rotation around a third axis, the first axis, the second axis and the third axis are parallel to each other, the piston rod of the cylinder can be extended or shortened and the pawl is connected to rotate around the second axis, so that the claw-shaped portion is stuck on the ratchet or separated from the ratchet.

2. The winch according to claim 1, characterized in that: The oil cylinder includes the piston rod, a cylinder sleeve and an elastic member. The piston rod includes a rod body and a plug body. One end of the rod body is fixedly connected to the plug body, and the other end is rotatably connected to the connecting part around a third axis. The plug body is arranged in the cylinder sleeve. The cylinder sleeve is provided with an oil port connecting the rod cavity in the cylinder sleeve and the outside of the cylinder sleeve. The end of the plug body facing away from the rod cavity has a limiting surface. One end of the elastic member abuts against the limiting surface, and the other end abuts against the inner wall of the cylinder sleeve.

3. The winch according to claim 2, characterized in that: It also includes a control system and a hydraulic system, wherein the control system is signal-connected to the hydraulic system, an output end of the hydraulic system is connected to the oil port, and the hydraulic system can increase or decrease the pressure of the hydraulic oil injected into the oil port under the control of the control system.

4. The winch according to claim 2, characterized in that: The elastic member is a disc spring, and the disc spring is sleeved outside the plug body.

5. The winch according to claim 2, characterized in that: The cylinder sleeve comprises a front gland, a middle sleeve and a rear gland, wherein the front gland and the rear gland are detachably connected to two ends of the middle sleeve respectively.

6. The winch according to claim 2, characterized in that: The plug body is provided with an annular flange, and the annular side surface of the annular flange facing away from the rod cavity forms the limiting surface.

7. The winch according to claim 1, characterized in that: The driving device is a motor.

8. The winch according to claim 1, characterized in that: The ratchet is welded to one end of the reel.

9. The winch according to claim 7, characterized in that: A planetary reducer is arranged at one end of the reel away from the ratchet wheel, the ring gear of the planetary reducer is fixedly connected to the reel, and the output shaft of the motor is fixedly connected to the central axis of the planetary reducer.

10. The winch according to claim 1, characterized in that: It also includes a pin shaft, the axis of which coincides with the second axis, one end of which is fixedly connected to the pawl, and the other end of which is rotatably connected to one end of the piston rod.

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