A safety rope lifting mechanism

Abstract

This utility model relates to the field of lifting device technology, specifically a safety rope lifting mechanism, which solves the problem of inconvenient safety rope installation caused by existing fixed tooth structures. It includes a housing, inside which a rotatable winch is installed. The winch comprises an outer disc and an inner disc, with a gap between the outer and inner discs for installing the safety rope. An installation hole is provided in the center of the winch. Several raised first teeth are fixedly arranged on the side of the outer disc facing the inner disc. Several second teeth corresponding to the first teeth are movably embedded on the inner disc. A drive shaft is adjustablely slidably inserted into the installation hole. A connecting frame is fixedly arranged on the drive shaft, and the connecting frame is fixedly connected to several of the second teeth. The drive shaft drives the connecting frame and the second teeth to move, adjusting the gap between the second and first teeth. When the gap between the second and first teeth increases, the safety rope can easily be inserted into the gap.

Description

Technical Field

[0001] This utility model relates to the field of lifting device technology, specifically a safety rope lifting mechanism. Background Technology

[0002] In scenarios such as high-altitude operations and cargo hoisting, safety rope lifting mechanisms are important equipment to ensure operational safety and efficiency. They mainly use a winch to wind a safety rope, and the forward and reverse rotation of the winch causes the lifting mechanism to move on the safety rope, thereby achieving the lifting of people or objects.

[0003] Existing safety rope lifting mechanisms typically include an inner and outer disc arranged opposite each other. To increase the friction between the winch and the safety rope and prevent slippage, protruding teeth are provided on the opposite side of the inner and outer discs. A gap is reserved between the inner and outer discs for the safety rope to be embedded. The spacing of the teeth on both sides is adapted to the diameter of the safety rope, so that the safety rope can make close contact with the teeth to enhance friction.

[0004] However, since the teeth on the inner and outer discs are mostly fixed, the protruding teeth can obstruct the safety rope when it is installed into the gap between the inner and outer discs. Especially when the safety rope is embedded into the gap, the fixed teeth structure requires force to be applied to the safety rope during installation, overcoming the resistance of the teeth, which increases the difficulty of installation, makes the operation inconvenient, and results in low installation efficiency. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a safety rope lifting mechanism that solves the problem of inconvenient safety rope installation caused by existing fixed tooth structures.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety rope lifting mechanism, comprising a housing, inside which a rotatable winch is installed for winding a safety rope. The winch includes an outer disc and an inner disc, with a gap between the outer disc and the inner disc for installing the safety rope. An installation hole is provided in the center of the winch. Several raised first teeth are fixedly arranged on the side of the outer disc facing the inner disc. Several second teeth corresponding to the first teeth are movably embedded on the inner disc. A drive shaft is adjustablely slidably inserted into the installation hole. A connecting frame is fixedly arranged on the drive shaft, and the connecting frame is fixedly connected to several of the second teeth. The drive shaft drives the connecting frame and the second teeth to move, thereby adjusting the distance between the second teeth and the first teeth.

[0007] Furthermore, the winch is concentrically provided with a connecting shaft, and the interior of the connecting shaft is provided with an installation groove, into which the end of the drive shaft can be inserted; the outer wall of the connecting shaft is provided with a plurality of through grooves, through which the corresponding connecting frame can pass.

[0008] Furthermore, a spring is installed in the mounting slot, and the spring provides elastic force to the drive shaft.

[0009] Furthermore, the inner disc has a groove for the second tooth to pass through, and the cross-sectional shape of the groove matches the cross-sectional shape of the second tooth.

[0010] Furthermore, a retaining edge is fixedly provided on the housing, the retaining edge surrounds the outside of the winch, and a gap is left between the inner wall of the retaining edge and the outer wall of the winch; an opening for the safety rope to pass through is provided on one side of the retaining edge, and a protective cover is also installed on the housing, the protective cover and the retaining edge cooperate to prevent the safety rope from falling off the winch.

[0011] Furthermore, the drive shaft extends outward, a stop is installed on the drive shaft, and a slot is opened on the protective cover for the drive shaft to enter. The width of the slot is smaller than the diameter of the stop. When the protective cover is installed in place, it limits the stop to prevent the drive shaft from moving axially, thus keeping the distance between the first tooth and the second tooth at a minimum.

[0012] Furthermore, the housing is provided with multiple connecting posts, the protective cover is rotatably connected to one of the connecting posts, and the protective cover is provided with slots that can engage with the other connecting posts.

[0013] Furthermore, each of the connecting posts is rotatably mounted on the outside.

[0014] Furthermore, the stop is rotatably connected to the drive shaft.

[0015] Compared with the prior art, the present invention provides a safety rope lifting mechanism, which has the following beneficial effects: This safety rope lifting mechanism, through the setting of mounting holes, drive shaft, connecting frame and movable second tooth, can adjust the distance between the second tooth and the first tooth when installing the safety rope by driving the drive shaft. When the distance between the second tooth and the first tooth increases, the tooth will not obstruct the safety rope, allowing the safety rope to be easily inserted into the gap, reducing the difficulty of operation and improving the installation efficiency of the safety rope. After installation, the second tooth can be reset via the drive shaft, reducing the gap with the first tooth and ensuring that the safety rope can be in close contact with both sets of teeth, maintaining the original friction between the teeth and the safety rope, and preventing the safety rope from slipping during lifting. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the safety rope lifting mechanism of this utility model; Figure 3 This is a three-dimensional structural diagram of the back of the safety rope lifting mechanism of this utility model; Figure 4 This is a three-dimensional structural diagram of the safety rope lifting mechanism of this utility model, wherein the protective cover is in the open state; Figure 5 This is a three-dimensional structural diagram of the winch of this utility model; Figure 6 This is a front view structural diagram of the winch of this utility model; Figure 7 This is a cross-sectional structural diagram of the winch of this utility model; Figure 8 This is a three-dimensional structural diagram of the winch of this utility model, in which the drive shaft is not installed; Figure 9 This is a three-dimensional structural diagram of the connecting frame of this utility model; Figure 10 This is a three-dimensional structural diagram of the shell of this utility model; Figure 11 This is a cross-sectional structural diagram of the sleeve of this utility model; Figure 12 This utility model Figure 6 A partially enlarged structural diagram of point A shown in the image; Figure 13 This utility model Figure 7 A partially enlarged structural diagram of point B shown in the image; Figure 14 This is a front sectional view of the safety rope of this utility model. Figure 15 This is a top sectional view of the safety rope of this utility model. In the diagram: 1. Housing; 2. Winch; 3. Connecting shaft; 4. Mounting hole; 5. Outer disc; 6. Inner disc; 7. First tooth; 8. Second tooth; 9. Drive shaft; 10. Connecting frame; 11. Through slot; 12. Through groove; 13. Safety rope; 14. Groove; 15. Mounting groove; 16. Spring; 17. Edge retainer; 18. Protective cover; 19. Slot; 20. Stop block; 21. Connecting column; 22. Slot; 23. Roller; 24. Ring; 25. Gearbox; 26. Insertion hole; 27. Sleeve; 28. Pin; 29. ​​Elastic component. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1 The present invention provides a safety rope lifting mechanism, including a housing 1, and a rotating winch 2 installed inside the housing 1. The main function of the winch 2 is to wind the safety rope 13. The winch 2 rotates in both directions and rubs against the safety rope 13 to drive the entire lifting mechanism to move.

[0019] like Figure 5 As shown, the winch 2 consists of an inner disc 6 and an outer disc 5. The inner disc 6 and the outer disc 5 are arranged opposite each other and there is a certain gap between them. The safety rope 13 is embedded in the gap. A connecting shaft 3 is fixedly installed at the center of the winch 2. The connecting shaft 3 is a power transmission component and can rotate synchronously with the winch 2.

[0020] To power the winch 2, a gearbox 25 is integrated into the housing 1. The gearbox 25 contains several sets of meshing gears, and the speed and torque can be adjusted through the transmission between these gears. This lifting mechanism can be driven in two ways: one is electric drive, where an external motor is connected to the power input of the gearbox 25, and the motor drives the gears inside the gearbox 25; the other is manual drive, where a rocker arm is installed at the corresponding interface of the gearbox 25, and the operator manually rotates the rocker arm to drive the gears inside the gearbox 25.

[0021] When the gearbox 25 is powered electrically or manually, the winch 2 rotates, generating friction between it and the safety rope 13 embedded in the gap. This friction drives the lifting mechanism to produce relative displacement between itself and the safety rope 13, ultimately achieving the lifting of a person or object.

[0022] like Figure 2-9 As shown, a mounting hole 4 is provided in the middle of the winch 2. Several raised first teeth 7 are fixedly installed on the side of the outer disc 5 facing the inner disc 6, and the first teeth 7 are distributed in a ring along the inner wall of the outer disc 5. Correspondingly, several second teeth 8 are movably installed on the inner disc 6, their positions corresponding to the first teeth 7. A drive shaft 9 is installed inside the mounting hole 4, and the drive shaft 9 is slidably fitted with the mounting hole 4, providing space for the drive shaft 9 to move in the axial direction. A connecting bracket 10 is fixedly installed on the drive shaft 9, extending radially and fixedly connected to each of the several second teeth 8 on the inner disc 6.

[0023] When it is necessary to adjust the tooth spacing, the drive shaft 9 is driven to move axially by external force, which can synchronously drive the connecting frame 10 and the second tooth 8 connected thereto to move together, adjusting the spacing between the second tooth 8 and the first tooth 7 on the outer disc 5. When installing the safety rope 13, the spacing between the first tooth 7 and the second tooth 8 can be increased to facilitate the installation of the safety rope 13.

[0024] like Figure 10 As shown, a groove 14 is provided on the inner side of the housing 1. This groove provides space for the connecting frame 10 to move, and avoids collision or interference between the connecting frame 10 and the inner wall of the housing 1 during the downward adjustment process.

[0025] like Figure 13 As shown, the connecting shaft 3 has an internal mounting groove 15, which allows the end of the drive shaft 9 to be inserted. The outer wall of the connecting shaft 3 has several through grooves 11, each with a certain length, providing space for the connecting frame 10 to move. The corresponding connecting frame 10 can pass through the through groove 11, which guides the movement of the connecting frame 10.

[0026] A spring 16 is installed in the mounting groove 15. One end of the spring 16 acts on the inner wall of the mounting groove 15, and the other end acts on the end of the drive shaft 9 (or the connecting bracket 10). The elastic force of the spring 16 acts on the drive shaft 9. When the drive shaft 9 is not subjected to external force, the spring 16 will release the elastic force and drive the drive shaft 9 to move axially outward. At the same time as the drive shaft 9 moves, it will synchronously drive the second tooth 8 to move towards the first tooth 7 through the connecting bracket 10, so that the first tooth 7 and the second tooth 8 are kept at the minimum distance, ensuring that the safety rope 13 can be in close contact with the first tooth 7 and the second tooth 8 when working.

[0027] like Figure 12 As shown, the inner disk 6 has several slots 12 for the second tooth 8 to pass through, and the cross-sectional shape of the slots 12 perfectly matches the cross-sectional shape of the second tooth 8. When the second tooth 8 moves up or down inside the slots 12, the inner wall of the slots 12 can effectively constrain the outer wall of the second tooth 8, preventing the second tooth 8 from shifting due to movement. The slots 12 guide the movement of the second tooth 8, ensuring that the position of the second tooth 8 always corresponds to the first tooth 7 on the outer disk 5.

[0028] A retaining flange 17 is fixedly installed on the housing 1. This retaining flange 17 is annularly surrounding the outside of the winch 2, and a certain gap is left between the inner wall of the retaining flange 17 and the outer wall of the winch 2. This gap can prevent the retaining flange 17 from contacting or interfering with the rotating winch 2, ensuring the normal rotation of the winch 2. An opening is provided on one side of the retaining flange 17, which allows the safety rope 13 to be smoothly inserted. In addition, a protective cover 18 is also installed on the housing 1. The protective cover 18 cooperates with the retaining flange 17 to prevent the safety rope 13 from detaching from the winch 2.

[0029] The drive shaft 9 extends outward at one end, and a stop 20 is installed at the outward extension point of the drive shaft 9. Correspondingly, the protective cover 18 has a slot 19 for the drive shaft 9 to pass through. The width of the slot 19 is smaller than the diameter of the stop 20. When the protective cover 18 is installed in place and fixedly connected to the housing 1, the surface of the protective cover 18 will axially limit the stop 20: the stop 20 is restricted to the outside of the protective cover 18 and cannot move through the slot 19 toward the winch 2, thereby preventing the drive shaft 9 from displacing axially. This effectively prevents the drive shaft 9 from moving axially due to external force or vibration during normal use, ensuring that the distance between the first tooth 7 and the second tooth 8 in the winch 2 is kept at the minimum distance and that the distance does not increase. By blocking and limiting the stop 20 with the protective cover 18, the safety rope 13 is prevented from slipping due to an increase in the distance between the first tooth 7 and the second tooth 8.

[0030] Multiple connecting posts 21 are fixedly installed on the housing 1. One of the connecting posts 21 is rotatably connected to the protective cover 18. The protective cover 18 has slots 22 that match the number of the other connecting posts 21. When the protective cover 18 is rotated, the other connecting posts 21 can be inserted into the slots 22 to achieve the positioning of the protective cover 18 after rotation. To limit the displacement of the protective cover 18, a nut is installed on the connecting post 21. Through the axial limiting effect of the nut, the protective cover 18 can only rotate around the connecting post 21 and cannot move along the axial direction of the connecting post 21, thus ensuring the limiting of the protective cover 18 on the stop block 20.

[0031] Two connecting posts 21 are located on both sides of the opening of the retaining flange 17, and rollers 23 are rotatably mounted on the outer wall of the connecting posts 21. When the safety rope 13 contacts the rollers 23 and drives the rollers 23 to rotate synchronously, the friction between the connecting posts 21 and the safety rope 13 is reduced by replacing sliding friction with rolling friction.

[0032] The stop block 20 is rotatably connected to the drive shaft 9, and their assembly is achieved through a bearing: the inner ring of the bearing is fixedly connected to the drive shaft 9, while the outer ring is fixedly connected to the stop block 20, allowing the stop block 20 to rotate relative to the drive shaft 9. When the protective cover 18 is installed in place and the stop block 20 is positioned outside the housing 1, the stop block 20 abuts against the outer wall of the protective cover 18, and the drive shaft 9 rotates synchronously with the winch 2. At this time, the stop block 20 abuts against the protective cover 18. The stop block 20 remains relatively stationary with respect to the housing 1, while the drive shaft 9 needs to rotate, thus preventing sliding friction between the stop block 20 and the housing 1 when the drive shaft 9 rotates.

[0033] like Figure 4 and 11 As shown, to prevent the protective cover 18 from rotating after it is installed in place and to ensure that the protective cover 18 limits the stop block 20, an insertion hole 26 is provided on the protective cover 18, and a sleeve 27 is fixedly installed on the housing 1. An elastic component 29 (usually a spring, a spring sheet, etc.) and an axially sliding pin 28 are installed inside the sleeve 27. One end of the elastic component 29 abuts against the bottom of the sleeve 27 and the other end is connected to the pin 28, which can provide elastic force to the pin 28. At the same time, the top of the sleeve 27 is provided with an inwardly protruding limiting structure (such as an annular step), which can prevent the pin 28 from completely disengaging from the sleeve 27 under the action of the elastic component 29, so that the pin 28 can protrude from the top of the sleeve 27 in its natural state. When the protective cover 18 is rotated to the correct position (i.e., when the protective cover 18 can stably block the stop block 20), the insertion hole 26 on the protective cover 18 will be precisely aligned with the sleeve 27 on the housing 1. At this time, the pin 28 inside the sleeve 27 enters the insertion hole 26 under the elastic force of the elastic component 29. The cooperation between the pin 28 and the insertion hole 26 locks the protective cover 18, effectively restricting the rotation of the protective cover 18.

[0034] When it is necessary to open the protective cover 18, simply press down on the pin 28 to overcome the elastic force of the elastic component 29 and disengage the pin 28 from the insertion hole 26 of the protective cover 18. Then, rotate the protective cover.

[0035] like Figure 14-15 As shown, the safety rope 13 used in this safety rope lifting mechanism has several rings 24 spaced apart along its length. The rings 24 are made of a rigid material, such as plastic or iron, to ensure structural strength.

[0036] During the weaving process of safety rope 13, the loop 24 is not placed on the outside of the rope body, but is pre-placed inward from the outer wall of the rope (that is, the outer diameter of the loop is smaller than the outer diameter of the safety rope): During weaving, the loop 24 is first positioned in the preset position, and then the outermost layer of the rope body is used for weaving and wrapping, so that the loop 24 is completely embedded in the installation rope and is not exposed on the surface of the rope body. At the same time, the weaving inside the installation rope remains intact, and the loop 24 is fixed inside only by the outer layer of weaving. This does not damage the original connection stability of the installation rope, and allows the loop 24 to form a uniformly distributed and rigid support point inside the rope.

[0037] The design of this built-in ring 24 greatly increases the friction between the installation rope and the hand when the operator grips it during actual use.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety rope lifting mechanism, comprising a housing (1), wherein a rotatable winch (2) is installed inside the housing (1), the winch (2) being used to wind a safety rope (13), characterized in that: The winch (2) includes an outer disc (5) and an inner disc (6). There is a gap between the outer disc (5) and the inner disc (6) for installing a safety rope (13). The winch (2) has a mounting hole (4) in the middle. The outer disc (5) has several raised first teeth (7) fixedly installed on the side facing the inner disc (6). The inner disc (6) has several second teeth (8) corresponding to the first teeth (7) movably embedded in it. A drive shaft (9) is slidably inserted into the mounting hole (4). A connecting frame (10) is fixedly installed on the drive shaft (9). The connecting frame (10) is fixedly connected to several second teeth (8). The drive shaft (9) drives the connecting frame (10) and the second teeth (8) to move, thereby adjusting the distance between the second teeth (8) and the first teeth (7).

2. The safety rope lifting mechanism according to claim 1, characterized in that: The winch (2) is concentrically provided with a connecting shaft (3), and the connecting shaft (3) has an installation groove (15) inside, into which the end of the drive shaft (9) can be inserted; the outer wall of the connecting shaft (3) has a number of through grooves (11), and the through grooves (11) can be passed through by the corresponding connecting frame (10).

3. The safety rope lifting mechanism according to claim 2, characterized in that: A spring (16) is installed in the mounting slot (15), and the spring (16) provides elastic force to the drive shaft (9).

4. The safety rope lifting mechanism according to claim 1, characterized in that: The inner plate (6) has a through groove (12) for the second tooth (8) to pass through, and the cross-sectional shape of the through groove (12) matches the cross-sectional shape of the second tooth (8).

5. The safety rope lifting mechanism according to any one of claims 1-4, characterized in that: A retaining edge (17) is fixedly provided on the housing (1). The retaining edge (17) surrounds the outside of the winch (2), and there is a gap between the inner wall of the retaining edge (17) and the outer wall of the winch (2). An opening for the safety rope (13) to pass through is provided on one side of the retaining edge (17). A protective cover (18) is also installed on the housing (1). The protective cover (18) cooperates with the retaining edge (17) to prevent the safety rope (13) from falling off the winch (2).

6. The safety rope lifting mechanism according to claim 5, characterized in that: The drive shaft (9) extends outward, and a stop (20) is installed on the drive shaft (9). The protective cover (18) has a slot (19) for the drive shaft (9) to enter. The width of the slot (19) is smaller than the diameter of the stop (20). When the protective cover (18) is installed in place, the stop (20) is limited by the protective cover (18) to prevent the drive shaft (9) from moving axially, and the distance between the first tooth (7) and the second tooth (8) is kept to a minimum.

7. The safety rope lifting mechanism according to claim 6, characterized in that: The housing (1) is provided with a plurality of connecting posts (21), and the protective cover (18) is rotatably connected to one of the connecting posts (21). The protective cover (18) is provided with a slot (22) that can engage with the other connecting posts (21).

8. The safety rope lifting mechanism according to claim 7, characterized in that: Each of the connecting posts (21) is rotatably mounted with a roller (23) on its exterior.

9. The safety rope lifting mechanism according to claim 6, characterized in that: The stop (20) is rotatably connected to the drive shaft (9).

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