A winch

Abstract

This invention provides a winch, belonging to the field of binding equipment technology. It solves the problem of complex structure in existing winches. This winch includes a support frame, a reel rotatably connected to the support frame, and an operating sleeve with a mounting bracket fixed to its end. The mounting bracket is rotatably sleeved on one end of the reel. Several pawls are hinged to the mounting bracket, and an elastic element acting on the pawls is also provided on the mounting bracket. Several circumferentially distributed locking holes are formed on the outer peripheral wall of the reel. All locking holes are square holes, and all locking holes penetrate the inner peripheral wall of the reel. The free end of the pawl has an L-shaped locking groove. When the operating sleeve rotates clockwise, the locking groove of the free end of the pawl engages with one edge of the locking hole opening. When the operating sleeve rotates counterclockwise, the free end of the pawl disengages from the locking hole under the pressure of the other edge of the locking hole opening. This winch simplifies the structure while ensuring reliable operation.

Description

Technical Field

[0001] This invention belongs to the field of binding equipment technology and relates to a winch. Background Technology

[0002] A winch is a common binding aid widely used in the automotive transportation industry, used in conjunction with binding straps to secure goods. A winch typically consists of a bracket fixed to the vehicle and a reel rotatably connected to the bracket. A one-way ratchet and pawl assembly is provided between the reel and the bracket for self-locking of the reel. For ease of operation, a control sleeve is rotatably connected to the end of the reel, and a ratchet and pawl assembly is also installed between the control sleeve and the reel, allowing the control sleeve to quickly reverse and reset its rotation.

[0003] The winch disclosed in the patent document (application number: 202420554832.7) includes a mounting frame, a belt shaft rotatably mounted on the mounting frame, and a rotating drum for driving the belt shaft to rotate. One end of the belt shaft extends out of the mounting frame, and two rotatable mounting plates are provided at the extended part, as well as a ratchet fixed between the two mounting plates. Each mounting plate has an upper protrusion and a lower protrusion at its top and bottom, respectively. A pawl assembly for linking the two mounting plates and locking them one-way with the ratchet is provided between the upper protrusion and the lower protrusion of the two mounting plates, respectively. The end of the belt shaft is fixed with a ratchet, which makes the structure relatively complex. The outer diameter of the ratchet is significantly larger than the outer diameter of the belt shaft, which requires the upper and lower protrusions on the two mounting plates to install the pawl, resulting in a large overall structural size. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing a winch that simplifies the structure while ensuring reliable operation.

[0005] The objective of this invention can be achieved through the following technical solution: A winch includes a bracket, a tubular reel rotatably connected to the bracket, and an operating sleeve with an annular mounting bracket fixed at one end. The mounting bracket is rotatably sleeved on one end of the reel. Several pawls are hinged to the mounting bracket, distributed circumferentially and with their free ends all inclined in the same circumferential direction. An elastic element acting on the pawls is also provided on the mounting bracket. The winch is characterized in that several circumferentially distributed locking holes are provided on the outer peripheral wall of the reel, all of which are square holes and penetrate the inner peripheral wall of the reel. The free end of the pawl has an L-shaped locking groove. When the operating sleeve rotates clockwise, the locking groove of the free end of the pawl engages with one side edge of the locking hole opening. When the operating sleeve rotates counterclockwise, the free end of the pawl leaves the locking hole under the pressure of the other side edge of the locking hole opening.

[0006] When in use, the binding strap is wound around the spool. The pry bar is inserted radially into the connecting hole on the control sleeve and the pry bar is moved in the direction of the free end of the pawl, causing the control sleeve to rotate forward. The groove of the free end of the pawl engages with one side edge of the pawl opening, and the groove wall of the pawl presses against the pawl wall and pushes the spool to rotate, causing the spool to wind the binding strap. When the pry bar swings back to reset and causes the control sleeve to reverse, the free end of the pawl can leave the pawl under the pressure of the other side edge of the pawl opening. When the pawl falls into the adjacent pawl under the action of the elastic element, it can make a ticking impact sound. Compared to existing winches where a ratchet is fixed to the end of the spool and the operating sleeve uses a pawl to push the ratchet to wind up the binding strap, this winch directly opens a locking hole on the outer peripheral wall of the spool. This locking hole is a through hole, making the drilling process more convenient. The pawl directly engages with the locking hole on the spool, which also allows the radial dimension of the mounting frame to be smaller. This eliminates the need for the large load-bearing component, the ratchet, and reduces the radial dimension of the mounting frame, thus simplifying the overall structure. Because the pawl drives the reel by pushing against the wall of the locking hole, and the point of action of both is closer to the center of the reel shaft, the operating force transmitted between them is greater. Therefore, the shape of the locking hole and the groove on the pawl ensure reliability. Specifically, the locking hole is rectangular, thus having a flat hole wall, while the pawl has an L-shaped groove, thus having two vertical or near-vertical groove walls. When the operating sleeve rotates forward and the groove at the free end of the pawl engages with one edge of the locking hole opening, one groove wall abuts against the reel, thus supporting and limiting the free end of the pawl. This allows the other groove wall to precisely abut against the wall of the locking hole. Consequently, during pry bar operation, the pawl can stably press against the wall of the locking hole to transmit operating force, ensuring reliability. In other words, this winch simplifies the structure while ensuring reliability by directly creating a locking hole on the reel and combining the shape of the locking hole with the groove on the pawl.

[0007] In the aforementioned winch, the pawl is elongated, and the side of the pawl facing away from the elastic element has an elongated reset plane. When the operating sleeve rotates forward and the slot of the free end of the pawl engages with one side edge of the locking hole, the reset plane abuts against or approaches the edge of the locking hole. When the slot of the free end of the pawl engages with one side edge of the locking hole, the reset plane can just abut against or approach the edge of the locking hole. This ensures that during the reverse reset operation of the pry bar, the reset plane of the pawl abuts against the edge of the locking hole in time and disengages from the locking hole under the pressure of the edge of the hole. At the same time, the reset plane also prevents the free end of the pawl from falling into the locking hole before the slot of the pawl abuts against the reel, ensuring reliable operation.

[0008] In the aforementioned winch, the locking hole has two opposing hole walls arranged circumferentially along the spool. When the operating sleeve rotates forward and the slot of the free end of the pawl engages with the outer edge of one of the hole walls, the reset plane abuts against or approaches the outer edge of the other hole wall. The pawl cooperates with the two flat hole walls of the locking hole to push the spool and disengage the pawl from the locking hole, ensuring reliable operation.

[0009] In the aforementioned winch, the mounting frame includes an annular frame with several mounting slots evenly distributed circumferentially. The openings of these slots penetrate the inner circumferential surface of the frame. Several pawls are located within these mounting slots, and their free ends can protrude from the slot openings under the action of an elastic element. The pawls are concealed within the mounting slots of the frame, with only their free ends protruding from the slot openings, preventing interference from foreign objects and ensuring reliable operation.

[0010] In the aforementioned winch, the mounting frame further includes two annular cover plates. The outer edge of the frame has an annular surrounding plate, with a protruding positioning portion on the inner circumferential wall of the surrounding plate. Positioning grooves are formed on the outer edge of the cover plates. The two cover plates are located on both sides of the frame and embedded within the surrounding plate, with the positioning portion of the surrounding plate engaging with the positioning groove of the cover plate. The two cover plates are locked and fixed by axially inserted screws. The operating sleeve is welded and fixedly connected to one of the cover plates. The cover plates, frame, and operating sleeve are coaxially arranged. The two cover plates seal both sides of the frame, allowing the ratchet pawl to be hidden between the frame and the two cover plates, ensuring reliable operation. The operating sleeve is welded and fixedly connected to one of the cover plates, transmitting the operating force to the ratchet pawl through the cover plate.

[0011] In the aforementioned winch, the screw passes through the mounting slot of the frame, and one end of the pawl is rotatably fitted onto the screw. The pawl is directly hinged using the screw that fixes the cover plate, simplifying the structure and facilitating assembly.

[0012] In the aforementioned winch, the bottom surface of the mounting groove also has a mounting post facing the groove opening. The elastic element includes a spring with one end sleeved on the mounting post, and the other end of the spring acting on the pawl. The spring is located within the mounting groove and positioned by the mounting post, ensuring that the spring acts stably on the pawl and improving reliability.

[0013] In the aforementioned winch, an annular limiting groove is circumferentially formed on the outer peripheral wall of one end of the reel. Several limiting pins are fixed circumferentially on the operating sleeve, and the inner ends of the limiting pins all protrude radially from the inner peripheral wall of the operating sleeve and are embedded in the limiting groove. The mounting bracket is rotatably sleeved on the end of the reel, while the end of the reel also extends into the operating sleeve. The inner ends of the limiting pins are embedded in the limiting groove, thereby axially limiting the mounting bracket at the end of the reel, ensuring reliable use. This structure also allows the mounting bracket, pawl, and operating sleeve to form a single module, which can be pre-assembled and then the mounting bracket can be sleeved on the end of the reel and axially limited by the limiting pins, making assembly more convenient.

[0014] In the aforementioned winch, the winch further includes a disc-shaped sealing cover. The inner surface of the sealing cover has a cylindrical sealing portion, and the outer peripheral wall of the sealing portion has two sets of annular sealing lips. The sealing portion is fixedly inserted into one end of the reel, and the sealing cover seals the end of the reel. The sealing lips are tightened against the inner peripheral wall of the reel, and the locking holes are all located between the two sets of sealing lips. The sealing portion and sealing lips on the sealing cover seal the opening of the mounting groove, preventing foreign objects from entering the mounting groove and interfering with the pawl, thus ensuring reliable operation.

[0015] In the aforementioned winch, the pawl's width along the axial direction of the reel is greater than the width of the limiting groove, and the outer edge of the sealing cover has a circumferentially chamfered conical surface. Before assembly, the free end of the pawl partially protrudes from the mounting groove opening, which interferes with the reel when the mounting bracket is fitted onto it. To address this, a chamfered conical surface is provided on the sealing cover, so that when the reel end is inserted into the inner hole of the mounting bracket, the chamfered conical surface can push the pawl inward. At the same time, the width of the pawl is also greater than the width of the limiting groove, thereby preventing the pawl from getting stuck in the limiting groove. In other words, the above structure allows the mounting bracket, pawl, and operating sleeve to be pre-formed as a whole and then directly fitted onto the reel end, making assembly more convenient.

[0016] Compared with existing technologies, this winch has the following advantages:

[0017] 1. Since the winch has a through hole directly on the outer wall of the shaft, the hole making is more convenient. The pawl directly engages with the through hole on the shaft, which also makes the radial dimension of the mounting frame smaller. This eliminates the need for the large load-bearing component, the ratchet, and makes the radial dimension of the mounting frame smaller, thus simplifying the overall structure.

[0018] 2. Because the chuck hole is rectangular, it has a flat hole wall. The pawl has an L-shaped groove, so it has two vertical or nearly vertical groove walls. When the operating sleeve rotates forward and the groove at the free end of the pawl engages with one edge of the chuck hole, one groove wall abuts against the reel, thus supporting and limiting the free end of the pawl. This allows the other groove wall to precisely abut against the chuck hole wall, so that the pawl can stably press against the chuck hole wall to transmit operating force during pry bar operation, ensuring reliable use.

[0019] 3. Since a sealing cap is also fixed at the end of the reel, the opening of the mounting groove is sealed by the sealing part and sealing lip on the sealing cap, which prevents foreign objects from entering the mounting groove and interfering with the pawl, thus ensuring reliable use. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the winch.

[0021] Figure 2 This is a three-dimensional structural diagram of the winch from another perspective.

[0022] Figure 3 This is a front view of the winch structure.

[0023] Figure 4 yes Figure 3 The structural cross-sectional view at point AA.

[0024] Figure 5 This is a three-dimensional structural diagram of the reel and mounting bracket.

[0025] Figure 6 This is a three-dimensional structural diagram of the winch without the cover plate installed.

[0026] Figure 7 yes Figure 4 Cross-sectional view of the structure at point BB.

[0027] In the diagram, 1. Bracket; 11. Base plate; 12. Side plate; 2. Roller; 21. Snap hole; 22. Limiting groove; 23. Strip hole; 3. Mounting bracket; 31. Frame body; 311. Mounting groove; 312. Enclosure plate; 313. Positioning part; 314. Mounting column; 32. Cover plate; 321. Positioning groove; 33. Screw; 4. Operating sleeve; 41. Limiting pin; 42. Connecting hole; 5. Pawl; 51. Free end; 52. Snap groove; 53. Reset plane; 6. Elastic element; 7. Sealing cover; 71. Sealing part; 72. Sealing lip; 73. Chamfered conical surface; 8. Ratchet; 9. Limiting pawl. Detailed Implementation

[0028] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0029] like Figure 1 As shown, a winch includes a support 1, a reel 2, and an operating sleeve 4. The support 1 is U-shaped and has a base plate 11 and side plates 12 located at both ends of the base plate 11. The reel 2 is tubular and has radially perforated slots 23 for connecting and binding straps. Figure 2 As shown, the two ends of the scroll 2 are rotatably connected to the two side plates 12 of the bracket 1, respectively. One end of the scroll 2 extends out of the side plate 12 and is fixedly connected to a ratchet 8. A limiting pawl 9 acting on the ratchet 8 is hinged on the outer surface of the side plate 12, thereby allowing the scroll 2 to rotate only in one direction. Figure 3 , Figure 4 As shown, the operating sleeve 4 has a connecting hole 42. An annular mounting bracket 3 is fixed to the end of the operating sleeve 4. The other end of the spool 2 extends out of the side plate 12. The mounting bracket 3 is rotatably sleeved on the end of the spool 2. A limiting pin 41 is fixed on the operating sleeve 4 to axially limit the mounting bracket 3 onto the spool 2. Four pawls 5 are hinged to the mounting bracket 3, evenly distributed circumferentially. The free ends 51 of the four pawls 5 are all inclined in the same circumferential direction. Four elastic elements 6 are also provided on the mounting bracket 3, acting on the four pawls 5 respectively. Eight evenly distributed circumferential locking holes 21 are provided on the outer circumferential wall of the spool 2. All locking holes 21 are square holes, and all locking holes 21 penetrate the inner circumferential wall of the spool 2. Figure 5 As shown, the free end 51 of the pawl 5 has an L-shaped groove 52. When the operating sleeve 4 rotates forward, the groove 52 of the free end 51 of the pawl 5 engages with one side edge of the opening of the hole 21. When the operating sleeve 4 rotates backward, the free end 51 of the pawl 5 leaves the hole 21 under the pressure of the other side edge of the opening of the hole 21.

[0030] Specifically, combined Figure 6 , Figure 7As shown, the mounting frame 3 includes an annular frame body 31 and two cover plates 32. The frame body 31 has four mounting slots 311, which are evenly distributed circumferentially. The openings of the mounting slots 311 are constricted and penetrate the inner circumferential surface of the frame body 31. The outer edge of the frame body 31 has an annular surrounding plate 312. The inner circumferential wall of the surrounding plate 312 has a protruding positioning part 313. Both cover plates 32 are annular, and positioning slots 321 are formed on the outer edge of the cover plates 32. The two cover plates 32 are located on both sides of the frame body 31 and are embedded in the surrounding plate 312. The positioning part 313 of the surrounding plate 312 is engaged in the positioning slot 321 of the cover plate 32. Four screws 33 are passed through one of the cover plates 32. The four screws 33 pass through the four mounting slots 311 and are screwed onto the other cover plate 32, thereby clamping the two cover plates 32 together to fix the frame body 31. Four pawls 5 are located in four mounting slots 311 respectively. The pawls 5 are elongated and one end of the pawl 5 is rotatably sleeved on the screw 33. There are also mounting posts 314 on the bottom surface of the mounting slots 311. The mounting posts 314 all face the opening of the mounting slots 311. The elastic element 6 includes a spring. One end of the spring is sleeved on the mounting post 314 and the other end acts on the pawl 5. The side of the pawl 5 facing away from the spring is an elongated reset plane 53. The locking hole 21 has two opposing hole walls arranged circumferentially along the spool 2. Both hole walls are arranged radially along the spool 2, so that the axis of the spool 2 is located on the plane where the two hole walls are located. When the operating sleeve 4 rotates forward and the slot 52 of the free end 51 of the pawl 5 engages with the outer edge of one of the hole walls of the locking hole 21, the reset plane 53 abuts or approaches the outer edge of the other hole wall.

[0031] The control sleeve 4, frame 31, and two cover plates 32 are coaxially arranged. One end of the control sleeve 4 is inserted into the inner hole of one of the cover plates 32, and the two are fixed together by welding. The inner hole walls of the control sleeve 4, frame 31, and the other cover plate 32 are coplanar. The mounting bracket 3 is sleeved on the end of the reel 2, and the end of the reel 2 extends into the control sleeve 4. A ring-shaped limiting groove 22 is provided circumferentially on the outer peripheral wall of the part of the reel 2 that extends into the control sleeve 4. The width of the pawl 5 along the axial direction of the reel 2 is greater than the groove width of the limiting groove 22. Several limiting pins 41 are fixed circumferentially on the control sleeve 4. The inner ends of the limiting pins 41 all protrude radially from the inner peripheral wall of the control sleeve 4 and are embedded in the limiting groove 22. The winch also includes a disc-shaped sealing cover 7. The inner side of the sealing cover 7 has a cylindrical sealing part 71. The outer peripheral wall of the sealing part 71 has two sets of annular sealing lips 72. The sealing part 71 is fixedly inserted into one end of the reel 2, and the sealing cover 7 seals the end of the reel 2. The sealing lips 72 are tightened on the inner peripheral wall of the reel 2. The locking holes 21 are all located between the two sets of sealing lips 72. The outer edge of the sealing cover 7 has an annular chamfered conical surface 73 in the circumferential direction.

[0032] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

[0033] Although this document frequently uses terms such as bracket 1, base plate 11, and side plate 12, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A winch, comprising a support (1), a tubular reel (2) rotatably connected to the support (1), and an operating sleeve (4) with an annular mounting frame (3) fixed at one end, wherein the mounting frame (3) is rotatably sleeved on one end of the reel (2), and a plurality of pawls (5) are hinged on the mounting frame (3) and distributed circumferentially, with their free ends (51) all inclined in the same circumferential direction; and an elastic element (6) acting on the pawls (5) is also provided on the mounting frame (3), characterized in that, The outer peripheral wall of the scroll (2) is provided with a number of circumferentially distributed locking holes (21). All locking holes (21) are square holes and all locking holes (21) penetrate the inner peripheral wall of the scroll (2). The free end (51) of the pawl (5) is provided with an L-shaped locking groove (52). When the operating sleeve (4) rotates forward, the locking groove (52) of the free end (51) of the pawl (5) engages with one side edge of the locking hole (21). When the operating sleeve (4) rotates in reverse, the free end (51) of the pawl (5) leaves the locking hole (21) under the pressure of the other side edge of the locking hole (21).

2. The winch according to claim 1, characterized in that, The pawl (5) is long and narrow, and the side of the pawl (5) facing away from the elastic member (6) is a long and narrow reset plane (53). When the operating sleeve (4) rotates forward and the slot (52) of the free end (51) of the pawl (5) is engaged with the edge of the hole (21), the reset plane (53) abuts against or approaches the edge of the hole (21).

3. The winch according to claim 2, characterized in that, The clasp (21) has two opposing clasp walls arranged circumferentially along the spool (2). When the operating sleeve (4) rotates forward and the slot (52) of the free end (51) of the pawl (5) engages at the outer edge of one of the clasp walls, the reset plane (53) abuts against or approaches the outer edge of the other clasp wall.

4. The winch according to claim 1, 2, or 3, characterized in that, The mounting frame (3) includes an annular frame (31), on which a plurality of mounting grooves (311) are provided. The plurality of mounting grooves (311) are evenly distributed along the circumference, and the groove openings of the mounting grooves (311) penetrate the inner circumferential surface of the frame (31). A plurality of pawls (5) are respectively located in the plurality of mounting grooves (311), and under the action of the elastic element (6), the free end (51) of the pawl (5) can protrude from the groove opening of the mounting groove (311).

5. The winch according to claim 4, characterized in that, The mounting frame (3) also includes two annular cover plates (32). The frame body (31) has an annular surrounding plate (312) along its outer edge. The surrounding plate (312) has a protruding positioning part (313) on its inner peripheral wall. The cover plate (32) has a positioning groove (321) on its outer edge. The two cover plates (32) are located on both sides of the frame body (31) and embedded in the surrounding plate (312). The positioning part (313) of the surrounding plate (312) is engaged in the positioning groove (321) of the cover plate (32). The two cover plates (32) are locked and fixed by axially inserted screws (33). The operating sleeve (4) is welded and fixed to one of the cover plates (32). The cover plate (32), the frame body (31) and the operating sleeve (4) are coaxially arranged.

6. The winch according to claim 5, characterized in that, The screw (33) passes through the mounting groove (311) of the frame (31), and one end of the pawl (5) is rotated and sleeved on the screw (33).

7. The winch according to claim 5, characterized in that, The bottom surface of the mounting groove (311) also has a mounting post (314) facing the groove opening. The elastic element (6) includes a spring with one end sleeved on the mounting post (314) and the other end of the spring acting on the pawl (5).

8. The winch according to claim 1, 2, or 3, characterized in that, The outer peripheral wall of one end of the scroll (2) is provided with an annular limiting groove (22) in the circumferential direction. Several limiting pins (41) are fixed on the operating sleeve (4) in the circumferential direction. The inner ends of the limiting pins (41) all protrude radially from the inner peripheral wall of the operating sleeve (4) and are embedded in the limiting groove (22).

9. The winch according to claim 8, characterized in that, The winch also includes a disc-shaped sealing cover (7), the inner side of which has a cylindrical sealing part (71), and the outer peripheral wall of the sealing part (71) has two sets of annular sealing lips (72). The sealing part (71) is fixedly inserted into one end of the reel (2), and the sealing cover (7) seals the end of the reel (2). The sealing lips (72) are tightened on the inner peripheral wall of the reel (2), and the locking holes (21) are all located between the two sets of sealing lips (72).

10. The winch according to claim 9, characterized in that, The width of the pawl (5) along the axial direction of the spool (2) is greater than the width of the limiting groove (22), and the outer edge of the sealing cover (7) has an annular chamfered cone surface (73) in the circumferential direction.

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