A rope self-locking structure and a self-locking wheel and a self-locking block having the same

Abstract

This invention discloses a rope self-locking structure, comprising two opposing clamping plates, with a connecting block between the two clamping plates for fixed connection. The connecting block is located on the inner side of the clamping plates, and the outer side of each clamping plate has an opening for a rope to enter between the two clamping plates. At least one clamping plate has a beveled rib on its inner side, the rib tilting from the outside inwards towards the direction of rope movement, and the top surface of the rib tilting from the outside inwards towards the center. The clamping plates of the self-locking block are straight plates, the connecting block is a straight block, and the beveled ribs are equidistant beveled ribs. The clamping plates of the self-locking wheel are circular plates, the connecting block is cylindrical, the opening is an annular opening, and the beveled ribs are equiangular beveled ribs. This structure has the advantages of simple structure, reliable locking, simple manufacturing process, low cost, and the ability to lock ropes of different sizes.

Description

Technical Field

[0001] The invention relates to the field of mechanical structures, and in particular to a rope self-locking structure, a self-locking wheel and a self-locking block. Background Art

[0002] A lifting device is a device that enables people or objects to move back and forth between low and high places. The important indicators of a lifting device are: 1. Safety; 2. Disassembly; 3. Crisis relief and escape functions.

[0003] Because outdoor work scenarios vary, for example, in the field of power construction, it is necessary to work on high power towers, which requires the use of lifting and climbing equipment. Due to the limitations of the construction site, the use of existing building elevators is very inconvenient. In addition, at the scene of a fire, the normal passage is blocked and there is no effective lifting device to assist in rescue work.

[0004] To this end, some people have designed a simple lifting device that relies on rope traction for lifting. It generally includes a motor, a turntable, a clamping piece and a rope. Specifically, the rope is wrapped around the turntable, the clamping piece clamps the rope, and the motor drives the turntable to rotate. The static friction between the rope and the turntable causes the turntable to roll along the rope, thereby driving the entire device to lift and lower. The forward / reverse rotation of the motor controls the rise or fall of the device.

[0005] However, in the existing lifting device of this structure, the clamping member is generally a pressure plate, which directly acts on the rope along the radial direction of the turntable. In order to have sufficient static friction between the rope and the turntable, it can be achieved by increasing the contact area between the rope and the turntable. At this time, the clamping member adopts an arc-shaped pressure plate, and the friction can also be increased by increasing the pressure of the clamping member. No matter which of the above methods is used to ensure the static friction between the rope and the turntable, the following problems always exist: 1. During the lifting process of the lifting device, there is sliding friction between the clamping member and the rope, and the sliding friction is in direct proportion to the static friction. On the one hand, the existence of the sliding friction will generate a lot of heat, which poses a safety hazard. On the other hand, long-term friction will cause the rope and the clamping member to wear continuously, which also poses a safety hazard. 2. The clamping member is generally fixed. As the use time increases, the clamping member wears continuously, the pressure decreases, and the static friction also decreases. On the one hand, the load-bearing capacity of the lifting device is reduced, and on the other hand, there is a risk of static friction suddenly changing into sliding friction.

[0006] The applicant has improved the turntable and the pressing member in the above-mentioned structure and designed an axial pressing mechanism, including a turntable and a pressing member, wherein a support platform extends from the circumferential side of the bottom of the turntable, a rope surrounds the outer periphery of the turntable along the circumferential direction of the turntable and is placed on the support platform, the pressing member includes a pressing shell and a pressing roller, the pressing roller is rotatably arranged on the pressing shell, the pressing shell can be fixed along the axial direction of the turntable, and the pressing roller presses the rope along the axial direction of the turntable to contact the support platform; when the turntable moves on the rope, the rope drives the pressing roller to rotate. In addition, the applicant has also designed a radial clamping mechanism, including a rotating disk and a clamping member, the clamping member is a chain structure, including a chain plate and a roller, the chain plates are hinged in sequence, the roller is hinged between the chain plates on both sides, the clamping member is fixed at both ends and is arranged on the periphery of the rotating disk, a rope passes between the rotating disk and the clamping member, the roller presses the rope to contact the rotating disk; when the rotating disk moves on the rope, the rope drives the roller to rotate. The above structure solves the relative fixation problem of the rope and the rotating disk.

[0007] However, both the radial clamping mechanism and the axial clamping mechanism are composed of a turntable and a clamping piece. As a safety device, the connection reliability between the various parts is extremely high and there can be no negligence. Therefore, the more parts there are, the less reliable it is, and the service life is relatively short. In addition, the production precision of the above structure is high, the manufacturing cost is high, which is not conducive to market promotion.

[0008] Therefore, how to improve the existing locking structure of the rope to overcome the above-mentioned problems is an urgent problem to be solved by those skilled in the art. Summary of the invention

[0009] An object of the present invention is to provide a rope self-locking structure which has a simple structure, reliable locking, and can lock ropes of different sizes.

[0010] Another object of the present invention is to provide a self-locking wheel which has a simple structure, reliable locking, simple process, low cost, and can lock ropes of different sizes.

[0011] Another object of the present invention is to provide a self-locking block which has a simple structure, reliable locking, simple process, low cost, and can lock ropes of different sizes.

[0012] In order to achieve the above purpose, the technical solution adopted by the present invention is: a rope self-locking structure, characterized in that: it includes two oppositely arranged splints, a connecting block is arranged between the two splints, the connecting block is used to fix the two splints, the connecting block is located on the inner side of the splint, the outer side of the splint has an opening, and the opening is for the rope to enter between the two splints; at least one of the splints is provided with an inclined rib on the inner side, the inclined rib is inclined from the outside to the inside toward the movement trend of the rope, and the top surface of the inclined rib is inclined from the outside to the inside toward the middle.

[0013] A self-locking block with a rope self-locking structure, characterized in that: it comprises two clamping plates arranged opposite to each other, a connecting block is arranged between the two clamping plates, the connecting block is used to fix and connect the two clamping plates, the connecting block is located on the inner side of the clamping plates, the outer side of the clamping plates has an opening, the opening is used for the rope to enter between the two clamping plates, at least one of the clamping plates has an oblique rib on the inner side, the oblique rib is inclined from the outside to the inside in the direction of the movement trend of the rope, and the top surface of the oblique rib is inclined from the outside to the inside towards the middle;

[0014] The clamping plate is a straight plate, the connecting block is a straight block, the opening is a straight opening, and the straight plate, the straight block and the straight opening form a "concave"-shaped structure; the oblique ribs are equidistant oblique ribs, and a plurality of equidistant oblique ribs are arranged on both straight plates, and the plurality of equidistant oblique ribs are parallel and equidistantly distributed on the straight plates; and the equidistant oblique ribs on both sides are staggeredly distributed;

[0015] The inclination angle of the top surface of the equidistant oblique ribs is α1, 5°≤α1≤20°; the inclination angle of the equidistant oblique ribs is β1, 30°≤β1≤80°.

[0016] Preferably, α1=10°, β1=45°.

[0017] A self-locking wheel with a rope self-locking structure, characterized in that: it comprises two clamping plates arranged opposite to each other, a connecting block is arranged between the two clamping plates, the connecting block is used to fix and connect the two clamping plates, the connecting block is located on the inner side of the clamping plates, the outer side of the clamping plates has an opening, the opening is used for the rope to enter between the two clamping plates, at least one of the clamping plates is provided with an inclined rib on the inner side, the inclined rib is inclined from the outside to the inside in the direction of the movement trend of the rope, and the top surface of the inclined rib is inclined from the outside to the inside towards the middle;

[0018] The splint is a circular plate, the connecting block is a cylinder, the opening is a circular ring opening, the circular plate and the cylinder are concentrically arranged, and the circular plate, the cylinder and the circular ring opening constitute an "I"-shaped roller structure; the oblique ribs are equiangular oblique ribs, and at least one of the circular plates is provided with a plurality of equiangular oblique ribs, and the plurality of equiangular oblique ribs are evenly distributed along the circumferential direction (the angles between adjacent equiangular oblique ribs are the same, and are radially arranged).

[0019] Preferably, the inclination angle of the top surface of the equiangular rib is α2, 5°≤α2≤20°; the inclination angle of the equiangular rib is β2, 30°≤β2≤80°. The two inclination angles directly affect the locking effect of the self-locking wheel, and the inclination angle in the above range has a better locking effect. Since the rope is wound around the self-locking wheel in the circumferential direction, the movement trend direction of the rope is always the tangent direction of the rope at this point, so it can be seen that the inclination angle of the equiangular rib is β2, which is the angle between the tangent of the equiangular rib at the circular plate and the equiangular rib.

[0020] Further preferably, α2=10°, β2=60°; the number of the equiangular oblique ribs is twelve. When β2=60°, according to the principle of geometry, the diameter of the cylinder is half of the diameter of the circular plate; at the same time, when the number of the equiangular oblique ribs is twelve, the angle between adjacent equiangular oblique ribs is 30°. The above-mentioned angle and number settings are both unified and coordinated, and have sufficient locking force.

[0021] As an implementation mode, the two circular plates are both provided with the equiangular oblique ribs, and the equiangular oblique ribs on both sides are staggered. The staggered distribution makes the locking more reliable, and preferably, equidistant staggering is adopted.

[0022] As another embodiment, one of the circular plates is provided with the equiangular oblique ribs, and the other circular plate is a flat plate surface.

[0023] As an improvement, the cylinder is a detachable structure, and the distance between the circular plates on both sides can be adjusted by moving the cylinder. The adjustable distance between the circular plates can be used for more ropes of different sizes, thereby improving the applicability and adjustability of the self-locking wheel.

[0024] Specifically, the cylindrical tooth key connection on both sides has an axial movement function and a circumferential fixing effect; a clamping device is arranged between the circular plates on both sides, and the clamping device includes a sleeve, a clamping ring and a clamping spring. The sleeve passes through the cylinder and is fixedly arranged on one of the circular plates, and the other circular plate is slidably arranged on the sleeve. The top of the sleeve is provided with a thread, and the clamping ring is threadedly connected to the sleeve. The clamping spring is arranged between the other circular plate and the clamping ring; the clamping ring rotates on the sleeve to adjust the distance between the two circular plates. The clamping device can not only adjust the distance between the circular plates, but also continuously provide circular plate pressure to ensure that there is sufficient static friction between the rope and the circular plate. In addition, by adjusting the pressure of the clamping spring, that is, adjusting the maximum pressure that the circular plates can bear, the maximum load can be adjusted.

[0025] Compared with the prior art, the rope self-locking structure of this solution has the following advantages: after the rope enters from the opening, when the rope and the rope self-locking structure have a considerable movement tendency, the rope can slide inward under the action of the inclined ribs, and at the same time, because the top surface of the inclined ribs is inclined toward the middle, the rope moves toward the middle while sliding inward, until the inclined ribs on both sides (or the splints on one side of the inclined ribs) completely compress the rope, thereby completing the self-locking; and because the top surfaces of the inclined ribs are V-shaped, ropes of different sizes can be locked. In summary, the rope self-locking structure of this solution has the advantages of simple structure, reliable locking, and the ability to lock ropes of different sizes.

[0026] Compared with the prior art, the self-locking block of this solution has the advantages of the above self-locking structure and has the following main functions: the self-locking block can firmly "grasp" the rope, can be applied to various rope climbing devices, and is also suitable for rope descent devices. In addition, the self-locking block of this solution has a simple structure, is easy to process, has low cost, and has great application prospects.

[0027] Compared with the prior art, the self-locking wheel of the present invention not only has the advantages of the above-mentioned self-locking structure, but also has the following functions: compared with the original turntable and pressure piece, the self-locking wheel can realize the functions of the original turntable and pressure piece with only one part, and the reliability and service life of the self-locking wheel are also significantly improved. Obviously, the self-locking wheel of the present invention has the advantages of simple structure, reliable locking, simple process, low cost, and can lock ropes of different sizes; it is worth mentioning that the self-locking wheel of the present invention can be used not only on lifting devices, but also on devices and equipment such as descending devices and capstans that need to lock ropes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic diagram of a three-dimensional structure according to the first embodiment of the present invention;

[0029] Figure 2 According to the first embodiment of the present invention Figure 1 A top view of the image with the angle indicated by α1 marked;

[0030] Figure 3 According to the first embodiment of the present invention Figure 1 Side view of

[0031] Figure 4 According to the first embodiment of the present invention Figure 2 The cross-sectional view along the AA direction is marked with the angle shown by β1;

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of a circular plate and a cylinder with equiangular oblique ribs on one side according to the second embodiment of the present invention;

[0033] Figure 6 According to the second embodiment of the present invention Figure 5 A side view of the image with the angle indicated by α2 marked;

[0034] Figure 7 According to the second embodiment of the present invention Figure 5 A top view of the image with the angle indicated by β2 marked;

[0035] Figure 8 is a schematic diagram of a three-dimensional structure when equal-angle oblique edges are provided on both sides according to the second embodiment of the present invention;

[0036] Fig. 9 is a schematic diagram of a three-dimensional structure when equiangular oblique edges are provided on one side according to the second embodiment of the present invention;

[0037] Fig.10 is a schematic diagram of a three-dimensional structure when a pressing device is provided according to the second embodiment of the present invention;

[0038] Fig.11 According to the second embodiment of the present invention Fig.10 Exploded view of;

[0039] Fig.12 According to the second embodiment of the present invention Fig.10 Side view of

[0040] Fig.13 According to the second embodiment of the present invention Fig.12 The cross-sectional view along the BB direction;

[0041] Fig.14 is a schematic diagram of the three-dimensional structure of a rope climbing device according to the first embodiment of the present invention;

[0042] Fig.15 is a schematic diagram of a three-dimensional structure when the second embodiment of the present invention is applied to a lifting device;

[0043] Fig.16 It is a schematic diagram of the three-dimensional structure when the second embodiment of the present invention is applied to a descent control device. DETAILED DESCRIPTION

[0044] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0045] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0046] like Figures 1 to 16 As shown, all embodiments have the same structure: a rope self-locking structure, specifically, comprising two oppositely arranged splints, a connecting block is arranged between the two splints, the connecting block is used to fix the two splints, the connecting block is located on the inner side of the splint, and the outer side of the splint has an opening, and the opening is for the rope to enter between the two splints; at least one of the splints is provided with an inclined rib on the inner side, the inclined rib is inclined from the outside to the inside in the direction of the movement trend of the rope, and the top surface of the inclined rib is inclined from the outside to the inside toward the middle.

[0047] Embodiment 1

[0048] like Figures 1 to 4 As shown, it is a structural schematic diagram of the self-locking block 1 of the first embodiment, which is specifically designed as follows based on the rope self-locking structure: the clamping plate is a straight plate 11, the connecting block is a straight block 12, the opening is a straight opening 14, and the straight plate 11, the straight block 12 and the straight opening 14 form a "concave"-shaped structure; the oblique ribs are equidistant oblique ribs 13, and a plurality of equidistant oblique ribs 13 are arranged on both straight plates 11, and the plurality of equidistant oblique ribs 13 are parallel and equidistantly distributed on the straight plates 11; and the equidistant oblique ribs 13 on both sides are staggered; the inclination angle of the top surface of the equidistant oblique ribs 13 is α1, 5°≤α1≤20°; the inclination angle of the equidistant oblique ribs 13 is β1, 30°≤β1≤80°. In this embodiment, α1=10°, β1=45°.

[0049] like Fig.14As shown, the structural schematic diagram of the self-locking block 1 of the first embodiment is applied to the rope climbing device, which includes a rope 100, a self-locking block 1 and a spring 3. Its working process is similar to that of a pole climber (also called a foot buckle). Specifically, the two ends of the two ropes 100 are fixed, the ropes 100 are grasped with both hands, and the feet are stepped on the rope climbing device. The self-locking block 1 and the rope 100 are locked by the friction between them. When climbing is required, the self-locking block 1 on one side is moved to both sides to separate from the rope 100, and then lifted to a suitable position. Finally, the self-locking block 1 is reset to the middle, and the rope 100 is continued to be "grabbed". The self-locking block 1 on the other side is alternately lifted using the same method to complete the climbing action. The function of the spring 3 is to limit the moving distance of the self-locking block 1, so that the self-locking block 1 can better enter and exit the rope 100.

[0050] Embodiment 2

[0051] like Figures 5 to 13 As shown, it is a structural schematic diagram of the self-locking wheel 2 of the second embodiment, which has the following specific designs based on the rope self-locking structure: the splint is a circular plate 21, the connecting block is a cylinder 22, the opening is a circular ring opening 24, the circular plate 21 and the cylinder 22 are concentrically arranged, and the circular plate 21, the cylinder 22 and the circular ring opening 24 constitute an "I"-shaped roller structure; the oblique ribs are equiangular oblique ribs 23, and at least one circular plate 21 is provided with a plurality of equiangular oblique ribs 23, and the plurality of equiangular oblique ribs 23 are evenly distributed along the circumferential direction. The inclination angle of the top surface of the equiangular oblique rib 23 is α2, 5°≤α2≤20°; the inclination angle of the equiangular oblique rib 23 is β2, 30°≤β2≤80°. In this embodiment, α2=10°, β2=60°, and there are twelve equiangular oblique ribs 23.

[0052] In addition, in order to increase the applicability of the self-locking wheel, the cylinder 22 is a detachable structure, and the distance between the circular plates 21 on both sides can be adjusted by moving the cylinder 22. Specifically, the cylinders 22 on both sides are connected by tooth keys, and have axial movement function and circumferential fixing function; a clamping device 25 is arranged between the circular plates 21 on both sides, and the clamping device 25 includes a sleeve 251, a clamping ring 252 and a clamping spring 253. The sleeve 251 passes through the cylinder 22 and is fixedly arranged on one of the circular plates 21, and the other circular plate 21 is slidably arranged on the sleeve 251. The top of the sleeve 251 is provided with a thread, and the clamping ring 252 is threadedly connected to the sleeve 251. The clamping spring 253 is arranged between the other circular plate 21 and the clamping ring 252; the clamping ring 252 rotates on the sleeve 251 to adjust the distance between the two circular plates 21.

[0053] This embodiment has two implementation modes: Figure 8 As shown, one of them is that both circular plates 21 are provided with equiangular oblique ribs 23, and the equiangular oblique ribs 23 on both sides are staggered. Fig. 9As shown, another type is that one of the circular plates 21 is provided with equiangular oblique ribs 23, and the other circular plate 21 is a flat plate surface.

[0054] like Fig.15 As shown, the self-locking wheel 2 of the second embodiment is applied to the structural schematic diagram of the lifting device, which includes a rope 100, a self-locking wheel 2 and a lifting motor 4. Through the forward and reverse rotation of the lifting motor 4, the self-locking wheel 2 can be lifted and lowered along the rope 100, thereby driving the entire lifting device to move.

[0055] like Fig.16 As shown, the self-locking wheel 2 of the second embodiment is applied to the structural schematic diagram of the slow descent device, which includes a rope 100, a self-locking wheel 2 and an escapement 5 (wherein the charging and discharging mechanism of the generator and the motor combination can also be regarded as an escapement). The slow descent device descends by gravity, so that the rope 100 drives the self-locking wheel 2 to rotate and transmits it to the escapement 5. The escapement reacts on the self-locking wheel 2, so that it can intermittently move on the rope 100 (that is, stop-and-descend alternately), so that the slow descent device achieves the purpose of slow descent.

[0056] In addition, the self-locking wheel 2 can also be applied to common mechanisms such as capstans.

[0057] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A self-locking wheel with a rope self-locking structure, characterized in that: It comprises two clamping plates arranged opposite to each other, a connecting block is arranged between the two clamping plates, the connecting block is used to fix and connect the two clamping plates, the connecting block is located on the inner side of the clamping plates, the outer side of the clamping plates has an opening, the opening is used for the rope to enter between the two clamping plates, at least one of the clamping plates has an inclined rib on the inner side, the inclined rib is inclined from the outside to the inside in the direction of the movement trend of the rope, and the top surface of the inclined rib is inclined from the outside to the inside towards the middle; The clamping plate is a circular plate, the connecting block is a cylinder, the opening is a circular ring opening, the circular plate and the cylinder are arranged concentrically, and the circular plate, the cylinder and the circular ring opening form an "I"-shaped roller structure; the oblique ribs are equiangular oblique ribs, at least one of the circular plates is provided with a plurality of equiangular oblique ribs, and the plurality of equiangular oblique ribs are evenly distributed along the circumferential direction; The self-locking wheel is applied to the descent control device, which includes a rope, a self-locking wheel and an escapement mechanism. The descent control device descends by gravity, so that the rope drives the self-locking wheel to rotate and transmits the rotation to the escapement mechanism. The escapement mechanism reacts on the self-locking wheel, so that the self-locking wheel can intermittently move on the rope, thereby enabling the descent control device to achieve the purpose of slow descent. The inclination angle of the top surface of the equiangular oblique rib is α2, 5°≤α2≤20°; the inclination angle of the equiangular oblique rib is β2, 30°≤β2≤80°; The two circular plates are both provided with the equiangular oblique ribs, and the equiangular oblique ribs on both sides are staggered; The cylindrical tooth key connection on both sides has axial movement function and circumferential fixing effect; a clamping device is arranged between the circular plates on both sides, and the clamping device includes a sleeve, a clamping ring and a clamping spring. The sleeve passes through the cylinder and is fixedly arranged on one of the circular plates, and the other circular plate is slidably arranged on the sleeve. A thread is arranged on the top of the sleeve, and the clamping ring is threadedly connected to the sleeve, and the clamping spring is arranged between the other circular plate and the clamping ring; the clamping ring rotates on the sleeve to adjust the distance between the two circular plates.

2. The self-locking wheel with a rope self-locking structure according to claim 1, characterized in that: α2=10°, β2=60°; there are twelve equal-angle oblique edges.

3. The self-locking wheel with a rope self-locking structure according to claim 1, characterized in that: One of the circular plates is provided with the equiangular oblique ribs, and the other circular plate is a flat plate surface.

4. A self-locking wheel with a rope self-locking structure according to any one of claims 1 to 3, characterized in that: The cylinder is a detachable structure, and the distance between the circular plates on both sides can be adjusted by moving the cylinder.

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