Mechanical winch with bidirectional self-locking mechanism

Abstract

The utility model discloses a kind of mechanical winch with bidirectional self-locking mechanism, it is related to mechanical winch technical field, including shell;Winch body, by rotating shaft rotation is located in shell, and its rotating shaft is sleeved with worm wheel;Driving shaft, rotating penetration is located on shell, and is sleeved with driving bevel gear;Transmission shaft, rotation is located in shell, and its fixed sleeve is equipped with the worm that is engaged with worm wheel and the driven bevel gear that is engaged with driving bevel gear;The beneficial effects of the utility model are that: worm gear and worm drive structure being set between winch body and driving shaft can have big transmission ratio characteristics, the high-speed small torque of transmission shaft can be converted into the low-speed large torque of winch body, suitable for lifting, traction and the like scene;While using the reverse self-locking of worm gear and worm drive, when driving shaft is suddenly stopped, winch body cannot reverse because worm wheel is locked by worm, prevent load from sliding or loosening, improve security.

Description

Technical Field

[0001] This utility model relates to the field of mechanical winch technology, specifically a mechanical winch with a bidirectional self-locking mechanism. Background Technology

[0002] As the core driving component for raising and lowering masts, the performance of the mechanical winch directly affects the effectiveness and safety of the mast.

[0003] However, most mechanical winches on the market lack a two-way self-locking function. This means that if the power source suddenly stops or malfunctions during the ascent of the boom, the winch cannot lock in time, and the boom will slide freely due to its own weight and load, which may cause serious damage to surrounding equipment and personnel. Similarly, during the descent, the lack of an effective two-way self-locking function makes it impossible to accurately control the descent speed and position of the boom, which can easily lead to loss of control of the boom and cause safety accidents. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a mechanical winch with a bidirectional self-locking mechanism.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A mechanical winch with a two-way self-locking mechanism includes a housing;

[0007] The winch body is rotatably mounted inside the housing via a rotating shaft, and a worm gear is fitted onto the rotating shaft.

[0008] The drive shaft is rotatably mounted on the housing and fitted with a drive bevel gear;

[0009] The drive shaft is rotatably mounted inside the housing, and a worm gear that meshes with the worm wheel and a driven bevel gear that meshes with the driving bevel gear are fixedly sleeved on it;

[0010] The winch body is driven to rotate synchronously by the drive shaft, and when the drive shaft stops abruptly, the winch body is self-locked by the meshing of the worm gear and worm.

[0011] Preferably, the end of the drive shaft is provided with a linkage block with a non-circular cross section, and a gap is formed between the linkage block and the outer wall of the housing. The outer wall of the housing is provided with a locking assembly that cooperates with the linkage block to control the locking of the drive shaft.

[0012] Preferably, the locking assembly includes a cover, and the cover contains a brake sleeve, a follower sleeve, a pressure block, a pair of threaded grooves, and a pair of screws arranged in sequence. The brake sleeve is movably sleeved on the drive shaft and located in the gap position. The follower sleeve is movably sleeved on the linkage block. The pressure block is located on one side of the follower sleeve. The pair of threaded grooves are symmetrically opened on the outer wall of the housing. The pair of screws are slidably inserted through the cover. When the screws are inserted into the corresponding threaded grooves and threadedly engaged, the relative position of the cover and the housing is locked.

[0013] Preferably, the outer wall of the housing is provided with a positioning groove, and one side of the brake sleeve is provided with an insertion rod. When the insertion rod is inserted into the positioning groove, the relative position of the brake sleeve and the housing is locked.

[0014] Preferably, the inner wall shape of the follower sleeve is adapted to the shape of the linkage block and has a clearance fit.

[0015] Preferably, the cover has a strip rod inside, and the pressure block has a strip groove on one side. When the strip rod is inserted into the strip groove, it locks the relative position of the pressure block and the cover.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] 1. The worm gear transmission structure set between the winch body and the drive shaft can have a large transmission ratio characteristic, which can convert the high speed and low torque of the drive shaft into the low speed and high torque of the winch body, making it suitable for lifting, traction and other scenarios. At the same time, by utilizing the reverse self-locking property of the worm gear and worm drive, when the drive shaft stops suddenly, the winch body cannot reverse because the worm gear is locked by the worm, preventing the load from slipping or loosening, thus improving safety.

[0018] 2. The locking assembly can mechanically lock the rotation of the drive shaft, preventing it from rotating unexpectedly due to external forces (such as load back drag). Combined with the self-locking property of the worm gear, it forms a double insurance, ensuring the reliability of the device in a static state. Attached Figure Description

[0019] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts. Wherein:

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a side view of the present invention.

[0022] Figure 3 This is a cross-sectional view of the present invention;

[0023] Figure 4This is a partial exploded view of the present invention;

[0024] Figure 5 This is an exploded view of the locking component in this utility model.

[0025] The diagram shows the following labels: 1. Housing; 11. Cover plate; 2. Winch body; 21. Worm gear; 3. Drive shaft; 31. Driving bevel gear; 32. Linkage block; 4. Transmission shaft; 41. Worm; 42. Driven bevel gear; 5. Locking assembly; 51. Brake sleeve; 510. Positioning groove; 511. Insert rod; 52. Follower sleeve; 53. Pressure block; 530. Strip groove; 54. Protective cover; 540. Strip rod; 55. Threaded groove; 56. Screw. Detailed Implementation

[0026] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0027] Example

[0028] like Figures 1-5 As shown, a mechanical winch with a two-way self-locking mechanism includes a housing 1, which serves as the support frame for the entire device and can be easily installed on a lifting rod; a cover plate 11 is also provided on one side of the housing 1 for protecting the device.

[0029] The winch body 2 is rotatably mounted inside the housing 1 via a rotating shaft, and is responsible for winding ropes or cables. It is the terminal component for power output; and a worm gear 21 is mounted on its rotating shaft.

[0030] The drive shaft 3 is rotatably mounted on the housing 1, with one end serving as an interface for external power input (such as a manual crank handle, motor, etc.), transmitting power through rotation; an active bevel gear 31 is fitted on the drive shaft 3;

[0031] The drive shaft 4 is rotatably mounted inside the housing 1, and a worm 41 that meshes with the worm gear 21 is fixedly sleeved on it; the driven bevel gear 42 that meshes with the driving bevel gear 31 forms a bevel gear transmission pair, which is used to change the direction of power transmission. A 90° power steering is achieved through bevel gear transmission, so that one end of the drive shaft 3 can be located on the side of the housing 1, which facilitates user operation and avoids interference with the lifting rod.

[0032] In summary, the worm gear 21 and worm 41 transmission has a large transmission ratio, which can convert the high-speed, low-torque of the drive shaft 4 into the low-speed, high-torque of the winch body 2, making it suitable for lifting, traction, and other scenarios. At the same time, by utilizing the reverse self-locking property of the worm gear 21 and worm 41 transmission (worm 41 can drive worm gear 21, but worm gear 21 cannot drive worm 41 in the reverse direction), when the drive shaft 3 stops suddenly, the winch body 2 cannot reverse because worm gear 21 is locked by worm 41, preventing the load from slipping or loosening and improving safety.

[0033] like Figure 4 and Figure 5 As shown, the end of the drive shaft 3 is provided with a non-circular cross-section linkage block 32, and a gap is formed between the linkage block 32 and the outer wall of the housing 1. The outer wall of the housing 1 is provided with a locking assembly 5 that works with the linkage block 32 to control the locking of the drive shaft 3. The locking assembly 5 locks the rotation of the drive shaft 3 through a mechanical structure to prevent it from rotating accidentally due to external forces (such as load back drag). Combined with the self-locking property of the worm gear 21 and worm 41, a double insurance is formed to ensure the reliability of the device in a static state.

[0034] The locking assembly 5 includes a cover 54, inside which are arranged a brake sleeve 51, a follower sleeve 52, a pressure block 53, a pair of threaded grooves 55 and a pair of screws 56 in sequence. The brake sleeve 51 is movably sleeved on the drive shaft 3 and is in a gap position. Its inner wall can contact the surface of the follower sleeve 52 to generate friction. The outer wall of the housing 1 is provided with a positioning groove 510. A plug rod 511 is provided on one side of the brake sleeve 51. When the plug rod 511 is inserted into the positioning groove 510, it locks the relative position of the brake sleeve 51 and the housing 1, preventing the brake sleeve 51 from rotating synchronously with the follower sleeve 52.

[0035] The follower sleeve 52 is movably fitted on the linkage block 32. The inner wall shape of the follower sleeve 52 is adapted to the shape of the linkage block 32 and has a clearance fit, so that it can rotate synchronously with the drive shaft 3.

[0036] The pressure block 53 is located on one side of the follower sleeve 52. The cover 54 is provided with a strip rod 540. A strip groove 530 is opened on one side of the pressure block 53. When the strip rod 540 is inserted into the strip groove 530, the relative position of the pressure block 53 and the cover 54 is locked. Through the cooperation of the strip groove 530 and the strip rod 540, the deflection of the pressure block 53 is restricted.

[0037] A pair of threaded grooves 55 are symmetrically opened on the outer wall of the housing 1, and a pair of screws 56 are slidably inserted on the cover 54. When the screws 56 are inserted into the corresponding threaded grooves 55 and threadedly engaged, the relative position of the cover 54 and the housing 1 is locked.

[0038] In summary, when the screw 56 is tightened into the threaded groove 55 and the relevant components in the cover 54 are tightly fitted, the pressure block 53 is forced to press the follower sleeve 52 towards the brake sleeve 51, forcing the brake sleeve 51 to press against the follower sleeve 52, generating frictional braking force. By utilizing the synchronous connection between the follower sleeve 52 and the linkage block 32, the drive shaft 3 is mechanically locked.

[0039] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A mechanical winch with a bidirectional self-locking mechanism, characterized in that, include: Shell (1); The winch body (2) is rotatably mounted inside the housing (1) via a rotating shaft, and a worm gear (21) is sleeved on its rotating shaft. The drive shaft (3) is rotatably mounted on the housing (1) and fitted with an active bevel gear (31). The drive shaft (4) is rotatably disposed inside the housing (1), and a worm (41) meshing with the worm wheel (21) and a driven bevel gear (42) meshing with the driving bevel gear (31) are fixedly sleeved on it. The winch body (2) is driven to rotate synchronously by the drive shaft (3), and when the drive shaft (3) stops suddenly, the winch body (2) is self-locked by the meshing of the worm wheel (21) and the worm (41).

2. A mechanical winch with a bidirectional self-locking mechanism according to claim 1, characterized in that: The end of the drive shaft (3) is provided with a linkage block (32) with a non-circular cross section, and a gap is formed between the linkage block (32) and the outer wall of the housing (1). The outer wall of the housing (1) is provided with a locking assembly (5) that cooperates with the linkage block (32) to control the locking of the drive shaft (3).

3. A mechanical winch with a bidirectional self-locking mechanism according to claim 2, characterized in that: The locking assembly (5) includes a cover (54), inside which are arranged a brake sleeve (51), a follower sleeve (52), a pressure block (53), a pair of threaded grooves (55) and a pair of screws (56). The brake sleeve (51) is movably sleeved on the drive shaft (3) and is in the gap position. The follower sleeve (52) is movably sleeved on the linkage block (32). The pressure block (53) is located on one side of the follower sleeve (52). A pair of threaded grooves (55) are symmetrically opened on the outer wall of the housing (1). A pair of screws (56) are slidably inserted through the cover (54). When the screws (56) are inserted into the corresponding threaded grooves (55) and threadedly engaged, the relative position of the cover (54) and the housing (1) is locked.

4. A mechanical winch with a bidirectional self-locking mechanism according to claim 3, characterized in that: The outer wall of the housing (1) is provided with a positioning groove (510), and a plug rod (511) is provided on one side of the brake sleeve (51). When the plug rod (511) is inserted into the positioning groove (510), the relative position of the brake sleeve (51) and the housing (1) is locked.

5. A mechanical winch with a bidirectional self-locking mechanism according to claim 4, characterized in that: The inner wall shape of the follower sleeve (52) is adapted to the shape of the linkage block (32) and has a clearance fit.

6. A mechanical winch with a bidirectional self-locking mechanism according to claim 5, characterized in that: The cover (54) is provided with a strip rod (540), and a strip groove (530) is provided on one side of the pressure block (53). When the strip rod (540) is inserted into the strip groove (530), the relative positions of the pressure block (53) and the cover (54) are locked.

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