Double-brake manned hydraulic winch

Abstract

The invention relates to the technical field of manned lifting, and particularly discloses a double-brake manned hydraulic winch which comprises a rack and a winding drum, a winch speed reducer is mounted on the rack, a hydraulic motor is mounted on one side of the winch speed reducer and is in transmission connection with the winch speed reducer, a front-end brake unit is coaxially arranged in the winding drum, and a rear-end brake unit is coaxially arranged in the winding drum. The front-end braking unit is in transmission connection with the winch speed reducer, and the rear-end braking unit is arranged on the side, away from the winch speed reducer, of the rack; the rear end braking unit is composed of an installation structure, a braking structure and a limiting structure, a connecting structure is coaxially installed at one end of the winding drum, and the installation structure, the braking structure and the limiting structure are sequentially arranged on the connecting structure in a sleeving mode; according to the double-brake manned hydraulic winch, front-end synchronous double braking is conducted on the winding drum through the front-end braking unit and the rear-end braking unit, the braking force is higher, the braking effect is more remarkable than that of a single brake, braking is more reliable and safer, and the high-reliability requirement of the manned winch is met.

Description

Technical Field

[0001] This invention relates to the field of passenger lifting technology, specifically to a dual-brake passenger hydraulic winch. Background Technology

[0002] A winch is a small, lightweight lifting device that uses a drum to wind steel wire rope or chain to lift or pull heavy objects. It can be used independently or as a component in lifting, road construction, and mine hoisting machinery. Due to its simple operation, large rope capacity, and ease of relocation, it is widely used in material lifting or horizontal dragging operations in construction, water conservancy projects, forestry, mining, and docks. Among these, personnel winches are mainly used in hoists, elevators, and other personnel lifting equipment in mines and buildings, providing power support for such equipment. Their operational safety is directly related to the safety of personnel.

[0003] Because the requirements for safety, stability, and reliability of personnel lifting equipment are far higher than those of ordinary material hoisting winches, personnel winches must possess excellent braking performance. However, existing ordinary winches generally only have one brake, which has significant drawbacks: on the one hand, a single brake has to bear the entire braking load, resulting in high working pressure, rapid wear, short service life, and frequent maintenance and replacement of the braking components; on the other hand, braking reliability is low. Once a single brake fails (such as hydraulic system leakage, excessive wear of friction pads, mechanical jamming, etc.), it will directly lead to brake failure, which in turn will cause serious safety accidents such as the personnel lifting equipment falling or going out of control, posing a great threat to the lives of personnel. Summary of the Invention

[0004] The present invention provides a dual-brake manned hydraulic winch, comprising a frame and a drum. A winch reducer is mounted on the frame, and a hydraulic motor is mounted on one side of the winch reducer. The hydraulic motor is connected to the winch reducer in a transmission. A front braking unit is coaxially arranged inside the drum and is connected to the winch reducer in a transmission. A rear braking unit is arranged on the side of the frame away from the winch reducer. Both the front braking unit and the rear braking unit are used to brake the drum. The rear braking unit consists of an installation structure, a braking structure, and a limiting structure. A connecting structure is coaxially installed at one end of the drum. The installation structure, braking structure, and limiting structure are sequentially fitted onto the connecting structure.

[0005] Preferably, the connecting structure includes a first connecting shaft, which is coaxially mounted on one end of the drum, and a second connecting shaft is mounted on one end of the first connecting shaft.

[0006] Preferably, the mounting structure includes a retaining ring, which is mounted on the frame. A bearing is coaxially disposed inside the retaining ring, and the bearing is fitted onto the first connecting shaft.

[0007] Preferably, the braking structure includes a first housing, which is coaxially fixed to one end of a fixed ring. Multiple static friction plates are installed on the inner wall of the first housing, and a limit ring is installed inside the first housing near the fixed ring.

[0008] Preferably, the braking structure further includes a bushing, which is fitted onto the second connecting shaft. Multiple dynamic friction plates are fitted onto the bushing, and the number of dynamic friction plates is the same as that of static friction plates, which are arranged at intervals.

[0009] Preferably, the limiting structure includes a second housing, which is coaxially fixed to one end of the first housing. A sealing seat is installed on the end of the second housing away from the first housing, and a positioning ring is installed on the inner wall of the end of the second housing away from the sealing seat. A limiting component is installed in the inner cavity of the second housing, and the limiting component is used to control the pressing state of the static friction plate and the dynamic friction plate.

[0010] Preferably, the limiting component includes a pressure post, which is movably installed in the inner cavity of the second housing, and the outer peripheral surface of the pressure post is in close contact with the inner wall of the positioning ring. A push ring is coaxially installed on the outer peripheral surface of the pressure post, and the outer peripheral surface of the push ring is in close contact with the inner wall of the second housing. An oil cavity is provided between the push ring and the positioning ring. An oil injection hole is opened on the outer surface of the second housing, and the oil injection hole communicates with the oil cavity. A chamber is formed between the pressure post and the sealing plate, and a butterfly spring is installed in the chamber.

[0011] Preferably, the inner wall of the positioning ring is provided with a first mounting ring groove, and the outer circumference of the push ring is provided with a second mounting ring groove. Both the first mounting ring groove and the second mounting ring groove are provided with sealing elements.

[0012] Preferably, the sealing element includes a sealing ring and a return spring, with one end of the return spring abutting against the sealing ring.

[0013] Preferably, an encoder is installed on the sealing seat, and a third connecting shaft is installed at one end of the second connecting shaft. The third connecting shaft is coaxially connected to the encoder, which is used to monitor the rotational speed of the drum.

[0014] The beneficial effects of this invention are: By using a front braking unit and a rear braking unit, the drum is simultaneously braked at the front end, resulting in stronger braking force and a more significant braking effect than a single brake. This makes the braking more reliable and safe, meeting the high reliability requirements of manned winches. It can also avoid the problem of excessive braking load caused by single braking, improve service life, and extend maintenance cycle. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the rear braking unit structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the connection structure of the present invention.

[0018] Figure 4 This is a schematic diagram of the braking structure of the present invention.

[0019] Figure 5 This is a schematic diagram of the limiting structure of the present invention.

[0020] Figure 6 This is the invention Figure 5 A magnified schematic diagram of the structure at point A in the middle.

[0021] Figure label: 10. Frame; 11. Drum; 12. Winch reducer; 13. Hydraulic motor; 14. First connecting shaft; 15. Second connecting shaft; 16. Fixing ring; 17. Bearing; 18. First housing; 19. Static friction plate; 20. Limiting ring; 21. Bushing; 22. Dynamic friction plate; 23. Second housing; 24. Sealing seat; 25. Positioning ring; 26. Pressing column; 27. Push ring; 28. Oil chamber; 29. ​​Oil injection hole; 30. Butterfly spring; 31. Mounting annular groove one; 32. Mounting annular groove two; 33. Sealing ring; 34. Return spring; 35. Encoder; 36. Third connecting shaft. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] like Figures 1 to 6 As shown, a dual-brake manned hydraulic winch of the present invention includes a frame 10 and a drum 11. A winch reducer is installed on the frame 10, and a hydraulic motor 13 is installed on one side of the winch reducer. The hydraulic motor 13 is connected to the winch reducer in a transmission. A front braking unit is coaxially arranged inside the drum 11. The front braking unit is connected to the winch reducer in a transmission. The front braking unit is a multi-plate wet brake. The winch reducer is driven by the hydraulic motor 13. The winch reducer drives the drum 11 to rotate through the front braking unit to perform the winding operation. A rear braking unit is arranged on the side of the frame 10 away from the winch reducer. Both the front braking unit and the rear braking unit are used to brake the drum 11. The rear braking unit consists of an installation structure, a braking structure, and a limiting structure. A connecting structure is coaxially installed at one end of the drum 11. The installation structure, braking structure, and limiting structure are sequentially fitted onto the connecting structure. The limiting structure is used to control the braking structure so that the drum 11 can be braked by the braking structure. Furthermore, the connecting structure includes a first connecting shaft 14, which is coaxially mounted on one end of the drum 11. The mounting structure includes a fixing ring 16, which is fixedly mounted on the frame 10. A bearing 17 is coaxially arranged inside the fixing ring 16 and is fitted onto the first connecting shaft 14. When the first connecting shaft 14 rotates, the bearing 17 will rotate accordingly. Since the fixing ring 16 is fixedly mounted on the frame 10, the fixing ring 16 will remain in a fixed state when the bearing 17 rotates. Furthermore, the braking structure includes a first housing 18, which is coaxially fixed to one end of a fixed ring 16. Multiple static friction plates 19 are evenly installed on the inner wall of the first housing 18. A limit ring 20 is installed inside the first housing 18 near the fixed ring 16, limiting the displacement distance of the static friction plates 19. The braking structure also includes a bushing 21. A second connecting shaft 15 is installed at one end of a first connecting shaft 14. The bushing 21 is fitted onto the second connecting shaft 15, which synchronously drives the bushing 21 to rotate. The bushing 21 itself cannot rotate but can slide on the bushing 21. Multiple dynamic friction plates 22 are evenly fitted onto the bushing 21. The number of moving friction plates 22 and static friction plates 19 are the same and they are arranged at intervals. When there is no need to brake the drum 11, there is a gap between the moving friction plates 22 and the static friction plates 19, and they do not contact each other. When the drum 11 rotates, the first and second connecting shafts 15 rotate synchronously, and the bushing 21 and the moving friction plates 22 will rotate accordingly. When it is necessary to brake the drum 11, the limiting structure will apply a supporting force to the static friction plates 19, so that the static friction plates 19 are offset towards the limiting ring 20, thereby pressing the static friction plates 19 and the moving friction plates 22 tightly together, so that the moving friction plates 22 become stationary, and drive the drum 11 to become stationary, thus achieving the braking operation of the drum 11. Furthermore, the limiting structure includes a second housing 23, which is coaxially fixed to one end of the first housing 18. A sealing seat 24 is installed at the end of the second housing 23 away from the first housing 18, and a positioning ring 25 is installed on the inner wall of the end of the second housing 23 away from the sealing seat 24. A limiting component is installed in the inner cavity of the second housing 23, which is used to control the pressing state of the static friction plate 19 and the dynamic friction plate 22. The limiting component includes a pressing post 26, which is movably installed in the inner cavity of the second housing 23, and the outer peripheral surface of the pressing post 26 is tightly fitted with the inner wall of the positioning ring 25. A push ring 27 is coaxially installed on the outer peripheral surface of the pressing post 26, and the outer peripheral surface of the push ring 27 is tightly fitted with the inner wall of the second housing. An oil cavity 28 is provided between the push ring 27 and the positioning ring 25. An oil injection hole 29 is opened on the outer surface of the second housing 23, which communicates with the oil cavity 28 and is connected to an external hydraulic device. A chamber is formed between the pressing post 26 and the sealing plate, and the chamber contains... A disc spring 30 is installed, which has a pre-compression deformation. The pre-compression deformation will drive the pressure column 26 and the push ring 27 to apply pressure to the static friction plate 19. (At this time, there is still an oil cavity 28 between the push ring 27 and the positioning ring 25, and the oil cavity 28 will not disappear due to the movement of the push ring 27.) This causes the static friction plate 19 to shift towards the limiting ring 20, and the static friction plate 19 and the moving friction plate 22 are tightly pressed together, making the moving friction plate 22 stationary. This causes the drum 11 to become stationary and cannot rotate. When braking is no longer needed, high-pressure hydraulic oil is injected into the oil injection hole 29 through an external hydraulic device. The high-pressure hydraulic oil will enter the oil cavity 28, thereby pushing the pressure column 26 and the push ring 27 to move in the opposite direction to the static friction plate 19, compressing the disc spring 30, releasing the tight pressing state of the moving friction plate 22 and the static friction plate 19, and no longer restricting the rotation of the drum 11. Furthermore, the inner wall of the positioning ring 25 is provided with a mounting ring groove 1, and the outer circumference of the push ring 27 is provided with a mounting ring groove 2. Both mounting ring groove 1 and mounting ring groove 2 are provided with sealing elements. The sealing elements include a sealing ring 33 and a return spring 34. One end of the return spring 34 abuts against the sealing ring 33. By providing the return spring 34 and the sealing ring 33 in the mounting ring groove 1 and mounting ring groove 2, it can be ensured that the positioning ring 25, the pressing column 26, and the push ring 27 are tightly fitted with the second housing 23, preventing the leakage of high-pressure hydraulic oil in the oil cavity 28. At the same time, the design of the return spring 34 allows the push ring 27 and the pressing column 26 to move smoothly laterally, avoiding the sealing ring 33 from affecting the lateral movement of the push ring 27 and the pressing column 26. Furthermore, an encoder 35 is installed on the sealing seat 24, and a third connecting shaft 36 is installed at one end of the second connecting shaft 15. The third connecting shaft 36 is coaxially connected to the encoder 35. The encoder 35 is used to monitor the rotational speed of the drum 11, thereby determining whether the winch has been braked to a stop. The encoder 35 can be connected to a remote display device to convert the detected electrical signals into more intuitive data.

[0024] The working principle of this invention is as follows: Normal operation: External hydraulic equipment injects high-pressure hydraulic oil into the oil injection hole 29. The high-pressure hydraulic oil enters the oil chamber 28, thereby pushing the pressure column 26 and the push ring 27 to move in the opposite direction to the static friction plate 19, compressing the disc spring 30, so that the moving friction plate 22 and the static friction plate 19 are in a tightly pressed state. The hydraulic motor 13 drives the winch reducer, and the winch reducer drives the drum 11 to rotate through the front braking unit, so that the drum 11 can perform the winding operation. The first connecting shaft 14 and the second connecting shaft 15 can rotate synchronously with the drum 11. When braking is required on the drum 11: the front braking unit brakes the front end of the drum 11, and at the same time, the external hydraulic equipment stops injecting high-pressure hydraulic oil into the oil chamber 28. The disc spring 30 releases its elastic deformation, which drives the push ring 27 and the pressure column 26 to apply pressure to the static friction plate 19, causing the static friction plate 19 to shift towards the limiting ring 20. The static friction plate 19 and the dynamic friction plate 22 are tightly pressed together, and the braking friction plate 22 becomes stationary. This, through the bushing 21, drives the second connecting shaft 15 to become stationary, so that the first connecting shaft 14 and the drum 11 become stationary. The drum 11 can no longer rotate, and then braking is performed on the rear end of the drum 11. The drum 11 is simultaneously braked at the front end, resulting in stronger braking force and a more significant braking effect than a single brake. The braking is more reliable and stable, meeting the high reliability requirements of the manned operation.

[0025] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to 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 limitations on this invention.

[0026] 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 at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0027] 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 dual-brake manned hydraulic winch, characterized in that, Includes a frame (10) and a drum (11). A winch reducer is installed on the frame (10). A hydraulic motor (13) is installed on one side of the winch reducer. The hydraulic motor (13) is connected to the winch reducer in a transmission. A front braking unit is coaxially arranged inside the drum (11). The front braking unit is connected to the winch reducer in a transmission. A rear braking unit is arranged on the side of the frame (10) away from the winch reducer. Both the front braking unit and the rear braking unit are used to brake the drum (11). The rear braking unit consists of an installation structure, a braking structure, and a limiting structure. A connecting structure is coaxially installed at one end of the drum (11). The installation structure, braking structure, and limiting structure are sequentially fitted onto the connecting structure.

2. The dual-brake manned hydraulic winch according to claim 1, characterized in that, The connection structure includes a first connecting shaft (14), which is coaxially mounted on one end of the drum (11), and a second connecting shaft (15) is mounted on one end of the first connecting shaft (14).

3. A dual-brake manned hydraulic winch according to claim 2, characterized in that, The mounting structure includes a fixing ring (16), which is mounted on the frame (10). A bearing (17) is coaxially arranged inside the fixing ring (16), and the bearing (17) is fitted on the first connecting shaft (14).

4. A dual-brake manned hydraulic winch according to claim 3, characterized in that, The braking structure includes a first housing (18), which is coaxially fixed to one end of a fixing ring (16). Multiple static friction plates (19) are installed on the inner wall of the first housing (18), and a limit ring (20) is installed inside the first housing (18) near the fixing ring (16).

5. A dual-brake manned hydraulic winch according to claim 4, characterized in that, The braking structure also includes a bushing (21), which is fitted on the second connecting shaft (15). Multiple dynamic friction plates (22) are fitted on the bushing (21). The number of dynamic friction plates (22) is the same as that of static friction plates (19), and they are arranged at intervals.

6. A dual-brake manned hydraulic winch according to claim 5, characterized in that, The limiting structure includes a second housing (23), which is coaxially fixed to one end of the first housing (18). A sealing seat (24) is installed at the end of the second housing (23) away from the first housing (18). A positioning ring (25) is installed on the inner wall of the end of the second housing (23) away from the sealing seat (24). A limiting component is installed in the inner cavity of the second housing (23). The limiting component is used to control the pressing state of the static friction plate (19) and the dynamic friction plate (22).

7. A dual-brake manned hydraulic winch according to claim 6, characterized in that, The limiting component includes a pressure post (26), which is movably installed in the inner cavity of the second housing (23). The outer peripheral surface of the pressure post (26) is tightly fitted with the inner wall of the positioning ring (25). A push ring (27) is coaxially installed on the outer peripheral surface of the pressure post (26). The outer peripheral surface of the push ring (27) is tightly fitted with the inner wall of the second housing. An oil cavity (28) is provided between the push ring (27) and the positioning ring (25). An oil injection hole (29) is opened on the outer surface of the second housing (23). The oil injection hole (29) communicates with the oil cavity (28). A chamber is formed between the pressure post (26) and the sealing plate. A butterfly spring (30) is installed in the chamber.

8. A dual-brake manned hydraulic winch according to claim 7, characterized in that, The inner wall of the positioning ring (25) is provided with a first mounting groove, and the outer circumference of the push ring (27) is provided with a second mounting groove. Both the first and second mounting grooves are provided with sealing elements.

9. A dual-brake manned hydraulic winch according to claim 8, characterized in that, The sealing element includes a sealing ring (33) and a return spring (34), with one end of the return spring (34) abutting against the sealing ring (33).

10. A dual-brake manned hydraulic winch according to claim 2, characterized in that, An encoder (35) is installed on the sealing seat (24), and a third connecting shaft (36) is installed at one end of the second connecting shaft (15). The third connecting shaft (36) is coaxially connected with the encoder (35), and the encoder (35) is used to monitor the rotational speed of the drum (11).

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