Rope locking device

Abstract

The present invention relates to the technical field of safety protection, and provides a rope locking device, comprising: a locking member adapted to switch between a locked state and an unlocked state with respect to a rope; a roller adapted to be pressed against the surface of the rope under the action of a pressing member; a rotating shaft adapted to rotate with the roller; a centrifugal member mounted on the rotating shaft and rotating with the rotating shaft, the centrifugal member switching between a centrifugal state and a reset state according to the change of centrifugal force; a driving member, when in the centrifugal state, the centrifugal member drives the driving member to move so that the locking member moves to the locked state, and when in the reset state, the centrifugal member is disengaged from the driving member so that the locking member is in the unlocked state. According to the rope locking device of the embodiment of the present invention, in the event of a fall, the centrifugal member switches to the centrifugal state, drives the driving member to move, and causes the locking member to switch to the locked state under the action of the driving member, ensuring the safety of personnel. This kind of rope locking device ensures the reliability of the fall protection function and can avoid casualties.

Description

Technical Field

[0001] The present invention relates to the technical field of safety protection, and in particular to a rope locking device. Background Art

[0002] At present, with the development of society, operations in high-altitude climbing environments and high-altitude transportation are extremely common. In industries such as wind power and construction, in order to ensure the construction safety of high-altitude workers, anti-fall devices with reliable performance must be installed. The rope locking device is an important anti-fall device that connects the ropes and operators in this industry. Through the rope locking device, the operator can move freely and safely along the length direction of the rope. For the structure of the rope locking device in the prior art, please refer to Figures 1 to 4 . Figure 1 And Figure 2 In, when a personnel falling event occurs, the safety hook 003 pulls the drive rod 001, causing the locking surface on the drive rod 001 to swing towards the rope direction until the locking surface and the rope are tightly clamped, playing a locking role to prevent the personnel from falling further. Figure 3 And Figure 4 In, one end of the drive rod 001 can trigger the lock block 002, causing the lock block 002 to swing synchronously with the rotation of the drive rod 001. When a falling event occurs, the falling of the personnel drives the movement of the safety hook 003, so that the drive rod 001 rotates and drives the lock block 002 to be tightly clamped with the steel wire rope, playing a locking role.

[0003] In the rope locking device in the prior art, the drive rod 001 is used as the triggering component of the locking member. When a falling event occurs, the unconscious grasping by the personnel in a panic may just hold the drive rod 001, causing the rope locking device to be in the state shown in Figure 5 Or Figure 6 . At this time, the drive rod 001 cannot rotate, resulting in the rope locking device being unable to lock in time, and thus losing the safety protection for the personnel, causing major accidents of life and death. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a rope locking device, which can drive the locking member to lock the rope when the relative movement speed of the roller with respect to the rope reaches a set value, thereby avoiding the protection loopholes existing in the traditional swing rod triggering lock, making the protection function safer and more reliable.

[0005] The rope locking device according to an embodiment of the present invention includes:

[0006] A locking member adapted to switch between a locked state and an unlocked state with respect to the rope;

[0007] A roller adapted to be pressed against the surface of the rope under the action of a pressing member;

[0008] A rotating shaft, adapted to rotate with the roller;

[0009] A centrifugal member, mounted on the rotating shaft and rotating with the rotating shaft, the centrifugal member switching between a centrifugal state and a reset state according to the change of centrifugal force;

[0010] A driving member, in the centrifugal state, the centrifugal member drives the driving member to move, so that the locking member moves to the locking state, and in the reset state, the centrifugal member and the driving member are disengaged, so that the locking member is in the unlocking state.

[0011] For the rope locking device according to an embodiment of the present invention, the centrifugal member switches between a centrifugal state and a reset state based on the rotational speed of the rotating shaft. In the event of a fall, the rotational speed of the rotating shaft is relatively high. At this time, the centrifugal force of the centrifugal member is relatively large, and then the centrifugal member switches to the centrifugal state, drives the driving member to move, and makes the locking member switch to the locking state under the action of the driving member, ensuring the safety of personnel. This kind of rope locking device can effectively solve the problem of locking failure caused by external factors, ensure the reliability of the fall protection function, and make the lifting equipment with this kind of rope locking device safer to use, avoiding casualties.

[0012] According to an embodiment of the present invention, it further includes:

[0013] A bearing, the bearing includes an inner bearing ring and an outer bearing ring;

[0014] The roller is formed with a receiving cavity, and the outer bearing ring is installed in the receiving cavity;

[0015] The driving member includes a drum, the drum is installed on the inner bearing ring, and in the centrifugal state, the centrifugal member and the inner surface of the drum form a limit fit, so that when the centrifugal member rotates, it drives the drum to rotate, and the drum drives the locking member to move to the locking state.

[0016] According to an embodiment of the present invention, the driving member further includes:

[0017] An end cover, used to close the opening of the receiving cavity, the end cover is formed with a first limiting portion, and the drum is formed with a second limiting portion matching the first limiting portion, so that the end cover rotates with the drum;

[0018] A connecting rod, one end is hinged to the end cover, and the other end is adapted to rotate with the end cover to drive the locking member to move to the locking state.

[0019] According to an embodiment of the present invention, the centrifugal member is a centrifugal flyweight. The first end of the centrifugal flyweight is hinged to the rotating shaft. The second end of the centrifugal flyweight forms a first step surface, and the centrifugal flyweight is connected to a tension spring. In the centrifugal state, the tension spring is in a stretched state, and in the reset state, the tension spring is in a natural state;

[0020] A second step surface is formed on the inner surface of the drum. In the centrifugal state, the first step surface and the second step surface are in limiting cooperation.

[0021] According to an embodiment of the present invention, there are two centrifugal flyweights which are arranged along the circumferential direction of the rotating shaft;

[0022] The second ends of the two centrifugal flyweights are connected by the tension spring passing through the rotating shaft;

[0023] Two symmetrically arranged bosses are formed on the rotating shaft, and the first ends of the two centrifugal flyweights are respectively hinged to one of the bosses.

[0024] According to an embodiment of the present invention, the roller includes a third limiting portion, and a fourth limiting portion matching the third limiting portion is formed on the rotating shaft so that the rotating shaft rotates with the roller.

[0025] According to an embodiment of the present invention, it further includes:

[0026] A housing, and the locking member, the roller, the rotating shaft, the centrifugal member and the driving member are all installed inside the housing;

[0027] A swing rod, one end of which extends into the housing and the other end extends out of the housing, and the swing rod is adapted to switch between a first position for driving the locking member to lock the rope and a second position for disengaging from the locking member.

[0028] According to an embodiment of the present invention, the pressing member is a first compression spring. The first end of the first compression spring is connected to the housing, and the second end of the first compression spring presses the roller against the surface of the rope;

[0029] The rope locking device further includes:

[0030] A roller, which is arranged corresponding to the roller so that the rope is located between the roller and the roller.

[0031] According to an embodiment of the present invention, the locking member and the roller are distributed along the length direction of the rope.

[0032] According to an embodiment of the present invention, the locking member and the roller are located on both sides of the rope.

[0033] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 is a schematic diagram of the working state of a prior art rope locking device when the driving rod and the rope are clamped;

[0036] Figure 2 is a schematic diagram of the working state of a prior art rope locking device when the driving rod and the rope are released;

[0037] Figure 3 is a schematic diagram of the working state of a prior art rope locking device when the locking block and the rope are released;

[0038] Figure 4 is a schematic diagram of the working state of a prior art rope locking device when the locking block and the rope are engaged;

[0039] Figure 5 is a schematic diagram of the working state of a prior art rope locking device including a locking block formed due to misoperation during a fall event;

[0040] Figure 6 is a schematic diagram of the working state of a prior art rope locking device formed due to misoperation during a fall event;

[0041] Figure 7 is a schematic diagram of the working state of the rope locking device according to an embodiment of the present invention under normal circumstances;

[0042] Figure 8 is a partial explosion schematic diagram of the rope locking device according to an embodiment of the present invention;

[0043] Figure 9 is a partial structural schematic diagram of the rope locking device according to an embodiment of the present invention;

[0044] Figure 10 is a partial sectional view schematic diagram of the rope locking device according to an embodiment of the present invention;

[0045] Figure 11 is an assembly schematic diagram of the rope and the roller in an embodiment of the present invention;

[0046] Figure 12 It is a schematic structural diagram of the roller according to an embodiment of the present invention;

[0047] Figure 13 It is a schematic diagram of the working state of the centrifugal weight according to an embodiment of the present invention;

[0048] Figure 14 It is an assembly schematic diagram when the centrifugal weight and the drum form a limit fit according to an embodiment of the present invention;

[0049] Figure 15 It is a schematic diagram of the rope locking device in the locked working condition according to an embodiment of the present invention;

[0050] Figure 16 It is a schematic structural diagram of the rope gripper from one perspective according to an embodiment of the present invention;

[0051] Figure 17 It is a schematic structural diagram of the rope gripper from another perspective according to an embodiment of the present invention;

[0052] Figure 18 It is a schematic diagram of the working state of the rope locking device under normal conditions according to another embodiment of the present invention;

[0053] Figure 19 It is a partial explosion schematic diagram of the rope locking device according to another embodiment of the present invention;

[0054] Figure 20 It is a partial sectional view schematic diagram of the rope locking device according to another embodiment of the present invention;

[0055] Figure 21 It is a schematic diagram of the working state of the centrifugal weight according to another embodiment of the present invention;

[0056] Figure 22 It is an assembly schematic diagram when the centrifugal weight and the drum form a limit fit according to another embodiment of the present invention;

[0057] Figure 23 It is a schematic diagram of the working state of the rope locking device according to another embodiment of the present invention;

[0058] Reference numerals:

[0059] 001, driving rod; 002, locking block; 003, safety hook;

[0060] 10, swing rod; 11, locking member; 100, rope;

[0061] 20. Speed measurement component; 21. Connecting rod; 211. Hinge hole; 22. Roller; 221. Arc-shaped outer surface; 222. Assembly hole; 223. Projection; 23. Centrifugal flyweight; 231. Fixing hole; 24. Tension spring; 25. Rotating shaft; 251. Non-circular section; 252. Boss; 26. Drum; 261. Buckling projection; 27. Bearing; 28. End cover; 281. Buckling groove; 282. Through hole; 283. Hinge shaft; 29. Pin shaft;

[0062] 30. Cable clamp; 31. Base; 32. Cable clamping plate; 33. Button; 34. Cap; 35. Second compression spring;

[0063] 40. Outer shell;

[0064] 60. Roller;

[0065] 70. First compression spring. Detailed implementation mode

[0066] The following further describes the implementation mode of the present invention in detail in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0067] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0068] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0069] In the embodiments of the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0070] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0071] Please refer to Figures 7 to 17 , a rope locking device according to an embodiment of the present invention includes a locking member 11, a roller 22, a rotating shaft 25, a centrifugal member, and a driving member. Among them, the locking member 11 is adapted to switch between a locked state and an unlocked state with respect to the rope 100; the roller 22 is adapted to be pressed against the surface of the rope 100 under the action of a pressing member; the rotating shaft 25 is adapted to rotate with the roller 22; the centrifugal member is mounted on the rotating shaft 25 and rotates with the rotating shaft 25, and the centrifugal member switches between a centrifugal state and a reset state according to the change of centrifugal force; in the centrifugal state, the centrifugal member drives the driving member to move, so that the locking member 11 moves to the locked state, and in the reset state, the centrifugal member is disengaged from the driving member, so that the locking member 11 is in the unlocked state.

[0072] For the rope locking device according to an embodiment of the present invention, the centrifugal member switches between a centrifugal state and a reset state based on the rotational speed of the rotating shaft 25. In the event of a fall, the rotational speed of the rotating shaft 25 is relatively high. At this time, the centrifugal force of the centrifugal member is relatively large, and then the centrifugal member switches to the centrifugal state, drives the driving member to move, and causes the locking member 11 to switch to the locked state under the action of the driving member, ensuring the safety of personnel. This kind of rope locking device can effectively solve the problem of locking failure caused by external factors, ensure the reliability of the fall protection function, and make the lifting equipment with this kind of rope locking device safer to use, and can avoid casualties.

[0073] According to an embodiment of the present invention, the rotation speed of the roller 22 can reflect the current falling speed. When the falling speed is too fast and reaches the set speed, the roller 22 will drive the centrifugal member to switch to the centrifugal state, realizing the locking of the locking member 11 and the rope 100. For example, when the rope locking device is installed between the rope 100 and the operator, once the operator accidentally falls, the operator who is accelerating downward will drive the roller 22 to rotate at an accelerated speed until the roller 22 reaches the set speed. At this time, the centrifugal member drives the driving member to move, and the driving member drives the locking member 11 to achieve locking, preventing the person from continuing to fall. Among them, when the rope locking device is installed between the rope 100 and the operator, the rope locking device includes a safety hook for connecting with the operator. Of course, the rope locking device can also be installed between the rope 100 and an elevator (or other lifting equipment outside the elevator).

[0074] According to an embodiment of the present invention, in the statement "the locking member 11 is adapted to switch between a locked state and an unlocked state with respect to the rope 100", the locked state of the locking member 11 refers to the situation where the locking member 11 is locked to the rope 100, and thus the resistance to relative movement between the locking member 11 and the rope 100 is very large or even they cannot move relative to each other; the unlocked state of the locking member 11 refers to the situation where the resistance to relative movement between the locking member 11 and the rope 100 is almost zero or very small when they move relative to each other.

[0075] According to an embodiment of the present invention, the statement "in the centrifugal state, the centrifugal member drives the driving member to move" means that the centrifugal member can move to the working position in the centrifugal state, and thus the centrifugal member that reaches the working position can drive the driving member to move. It does not require that the centrifugal member must be able to drive the driving member to move as long as it is in the centrifugal state. For example, a critical value can be set for the centrifugal force of the centrifugal member. Then, when the centrifugal member is in the critical state but the centrifugal force has not reached the critical value, there may be no power transmission between the centrifugal member and the drive at this time.

[0076] Please refer to Figure 8 and Figure 9, the rope locking device further includes a bearing 27. Among them, the bearing 27 includes an inner bearing ring and an outer bearing ring. The roller 22 is formed with a receiving cavity, and the outer bearing ring is installed in the receiving cavity. The driving member includes a drum 26, and the drum 26 is installed on the inner bearing ring. In the centrifugal state, a limiting fit is formed between the centrifugal member and the inner surface of the drum 26. In this case, after the roller 22, the bearing 27, and the driving member are installed, the bearing 27 is located in the receiving cavity of the roller 22, and the driving member is located inside the bearing 27. Furthermore, the space occupied by the rope locking device is very small. And, since a limiting fit is formed between the centrifugal member and the inner surface of the drum 26, it can be ensured that the centrifugal member drives the drum 26 to rotate in the centrifugal state, and the rotation of the drum 26 can drive the locking member 11 to achieve locking. Obviously, the specific structural form of the limiting fit between the drum 26 and the centrifugal member is not limited, as long as the requirement that the centrifugal member drives the drum 26 to rotate is met. Since the centrifugal member is in cooperation with the inner surface of the drum 26, the centrifugal member is located inside the drum 26.

[0077] In one embodiment, the driving member further includes an end cap 28, and the end cap 28 is used to close the opening of the receiving cavity. And, the end cap 28 is formed with a first limiting portion, and the drum 26 is formed with a second limiting portion that matches the first limiting portion, so that the end cap 28 rotates with the drum 26. By providing the end cap 28, components such as the bearing 27, the drum 26, and the centrifugal member in the receiving cavity can be protected, ensuring the normal operation of the bearing 27, the drum 26, and the centrifugal member, etc.

[0078] In one embodiment, the rope locking device includes a connecting rod 21. One end of the connecting rod 21 is hinged to the end cap 28, and the other end is connected to the locking member 11 through a combination of a long hole and a pin shaft 29. By connecting the drum 26 and the locking member 11 through the connecting rod 21, the flexibility of the relative position between the locking member 11 and the drum 26 can be ensured, improving the adaptability of the rope locking device. For example, the structural form of the connecting rod 21 can be replaced to adapt to the positional relationship between the locking member 11 and the drum 26.

[0079] Figure 8 and Figure 9 In, the end cap 28 is formed with a hinge shaft 283, and the connecting rod 21 is formed with a hinge hole 211. Through the cooperation between the hinge shaft 283 and the hinge hole 211, it is ensured that when the end cap 28 rotates, the connecting rod 21 can rotate relative to the end cap 28. Of course, a hinge hole can also be formed on the end cap 28, and a hinge shaft can be formed on the connecting rod 21, which can also achieve the hinge fit between the end cap 28 and the connecting rod 21.

[0080] In one embodiment, please refer to Figure 8, the drum 26 and the end cover 28 are buckled together. For example, a buckling convex block 261 is formed at the end of the drum 26 facing the end cover 28, and a buckling groove 281 is formed in the end cover 28. Among them, the positions of the buckling convex block 261 and the buckling groove 281 can also be interchanged, that is, a buckling groove is formed at the end of the drum 26, and a buckling convex block is formed in the end cover 28. Of course, for the first limiting part and the second limiting part between the drum 26 and the end cover 28, in addition to adopting the structural form of the buckling convex block 261 and the buckling groove 281, other structural forms of limiting cooperation disclosed in the prior art can also be adopted, as long as it is ensured that the drum 26 can drive the end cover 28 to rotate.

[0081] In one embodiment, a through hole 282 is formed in the end cover 28. The first end of the rotating shaft 25 and the roller 22 are in limiting cooperation, and the second end of the rotating shaft 25 passes through the through hole 282. After the rotating shaft 25 passes through the through hole 282, a fixing member can be used to prevent the rotating shaft 25 from withdrawing from the through hole 282, so as to realize the installation of the entire rope locking device.

[0082] In one embodiment, the centrifugal member is a centrifugal throwing block 23. The first end of the centrifugal throwing block 23 is hinged to the rotating shaft 25. A first step surface is formed at the second end of the centrifugal throwing block 23, and the centrifugal throwing block 23 is connected to a tension spring 24. In the centrifugal state, the tension spring 24 is in a stretched state, and in the reset state, the tension spring 24 is in a natural state; a second step surface is formed on the inner surface of the drum 26. In the centrifugal state, the first step surface and the second step surface are in limiting cooperation. The centrifugal member adopts the form of the centrifugal throwing block 23 to ensure the contact strength with the inner surface of the drum 26. Of course, the structural form of the centrifugal member is not limited by the examples here. For example, the centrifugal member can also adopt the form of a centrifugal rod. Then, when the rotation speed of the roller 22 reaches the set speed, a limiting cooperation is formed between the centrifugal member and the drum 26, so that the rotating shaft 25 drives the drum 26 to rotate through the centrifugal member. And the cooperation between the first step surface and the second step surface can also ensure the structural strength of the limiting cooperation position. Obviously, the limiting cooperation method is not limited to the cooperation of the step surfaces.

[0083] In one embodiment, please refer to Figure 8 and Figure 9, there are two centrifugal weights 23 which are arranged circumferentially along the rotating shaft 25; the second ends of the two centrifugal weights 23 are connected by a tension spring 24 passing through the rotating shaft 25. In this case, the two centrifugal weights 23 surround the outside of the rotating shaft 25, and the forces on the two centrifugal weights 23 are basically the same. Therefore, when the centrifugal weights 23 drive the drum 26 to rotate, the force on the drum 26 can be ensured to be balanced. Of course, the number of centrifugal weights 23 is not limited by the example here. For example, in order to increase the force-bearing area between the centrifugal member and the drum 26, the number of centrifugal weights 23 can be increased. When there are two centrifugal weights 23, the two centrifugal weights 23 are connected by a tension spring 24. Therefore, when the rotating speed of the rotating shaft 25 is relatively high, the second ends of the centrifugal weights 23 move in a direction away from the rotating shaft 25 under the action of centrifugal force, and at this time the tension spring 24 is stretched. When the speed of the rotating shaft 25 decreases, once the restoring force of the tension spring 24 is greater than the centrifugal force of the second ends of the centrifugal weights 23, the second ends of the centrifugal weights 23 move in a direction close to the rotating shaft 25 under the action of the restoring force of the tension spring 24, so that the movement transmission between the centrifugal weights 23 and the inner surface of the drum 26 is no longer carried out.

[0084] Among them, the "second end of the centrifugal weight 23" is only a relative concept with respect to the "first end of the centrifugal weight 23". Figure 8 In, taking the area where the centrifugal weight 23 is hinged to the rotating shaft 25 as the first end of the centrifugal weight 23, the area located downstream of the first end of the centrifugal weight 23 along the counterclockwise direction can all be called the second end of the centrifugal weight 23. For example, Figure 8 in, the second end of the centrifugal weight 23 connected by the tension spring 24 corresponds to the middle position of the centrifugal weight 23. Of course, the installation position of the tension spring 24 is not limited by the example here.

[0085] In an embodiment, the centrifugal weight 23 is provided with a mounting hole for the tension spring 24. After the tension spring 24 passes through the rotating shaft 25, the two ends are respectively connected to the mounting holes of different centrifugal weights 23, and the two ends of the tension spring 24 are fixed to the mounting holes of the centrifugal weight 23 by a pin shaft 29. In this case, the disassembly and assembly of the tension spring 24 are convenient. Of course, in order to realize the installation of the tension spring 24, the mounting hole and the pin shaft 29 are not necessary components, and other methods can also be used to realize the fixation between the tension spring 24 and the centrifugal weight 23. Among them, the pin shaft 29 for fixing the tension spring 24 is installed in the fixing hole 231 of the centrifugal weight 23.

[0086] Please refer to Figure 8 , corresponding to the number of centrifugal weights 23 being two, the rotating shaft 25 is formed with two symmetrically arranged convex platforms 252, and the first ends of the two centrifugal weights 23 are respectively hinged to a convex platform 252 by a pin shaft 29. The setting of the convex platform 252 can facilitate the installation of the centrifugal weight 23.

[0087] In one embodiment, the roller 22 includes a third limiting portion, and the rotating shaft 25 is formed with a fourth limiting portion matching the third limiting portion, so that the rotating shaft 25 rotates with the roller 22. For example, the roller 22 is formed with a non-circular hole, that is, a protrusion 223 is formed on the assembly hole 222 of the roller 22 for assembling the rotating shaft 25; the rotating shaft 25 includes a non-circular section 251, and the protrusion 223 and the non-circular section 251 are structurally adapted. Furthermore, through the cooperation between the non-circular hole and the non-circular section 251, it can be ensured that the rotating shaft 25 rotates along with the roller 22 when the roller 22 rotates. And in this case, the roller 22 and the rotating shaft 25 are convenient to disassemble and assemble. Of course, in order to enable the roller 22 to drive the rotating shaft 25 to rotate, the roller 22 and the rotating shaft 25 can also be fixed by a threaded connection or other connection methods.

[0088] In one embodiment, the rope locking device further includes a housing 40. Among them, the locking member 11, the roller 22, the rotating shaft 25, the centrifugal member and the driving member are all installed inside the housing 40. In this case, it can further protect the locking member 11, the roller 22, the rotating shaft 25, the centrifugal member and the driving member, etc., and ensure the normal operation of the rope locking device.

[0089] In one embodiment, the rope locking device further includes a swing rod 10. One end of the swing rod 10 extends into the housing 40, and the other end extends out of the housing 40, and the swing rod 10 is adapted to switch between a first position for driving the locking member 11 to lock the rope 100 and a second position for disengaging from the locking member 11. Through the arrangement of the swing rod 10, it is ensured that the rope locking device has an artificial locking function, and thus this kind of rope locking device has a dual protection function. In general, as long as the swing rod 10 is manually swung, the locking member 11 can be driven to move to the locking state, so that the roller 22 of the rope locking device cannot roll relative to the rope 100. In special cases, even if a person does not operate the swing rod 10 correctly due to panic, since the roller 22 itself is equivalent to having a speed measurement function, once the roller 22 moves at a speed exceeding the set speed, the centrifugal member controls the locking member 11 to move to the locking state through the driving member to ensure the locking reliability.

[0090] In one embodiment, please refer to Figure 7 and Figure 10 , the pressing member is a first compression spring 70. The housing 40 is connected to the first end of the first compression spring 70, and the second end of the first compression spring 70 presses the roller 22 against the surface of the rope 100; the rope locking device further includes a roller 60, and the roller 60 and the roller 22 are arranged correspondingly, so that the rope 100 is located between the roller 22 and the roller 60 to ensure that there is a contact pressure between the roller 22 and the rope 100. Of course, the structural form of the pressing member is not limited by the example here, as long as the slipping of the roller 22 can be avoided. Among them, the roller 60 is fixed on the housing 40, and thus the rope 100 is indirectly supported and limited through the housing 40.

[0091] Figure 7 and Figure 10 In this case, the number of roller wheels 60 is two, and the number of the first compression springs 70 is two. Obviously, the numbers of the roller wheels 60 and the first compression springs 70 are not limited by the examples herein.

[0092] In one embodiment, the rope locking device includes a rope gripper 30. The rope gripper 30 includes a base 31. The roller 22 is installed in the base 31. Two first compression springs 70 are arranged corresponding to the upper and lower ends of the base 31. One end of the first compression spring 70 uses the outer shell 40 as a limiting surface, and the other end of the first compression spring 70 is connected to the base 31, so that the first compression spring 70 is compressed and arranged between the base 31 and the outer shell 40.

[0093] Please refer to Figure 11 and Figure 12 , the roller 22 includes an arc-shaped outer surface 221. The arc-shaped outer surface 221 forms an opening substantially in a V shape, that is, the cross section of the roller 22 is substantially in a V shape. In this case, the contact area between the rope 100 and the outer surface of the roller 22 can be ensured, thereby preventing the roller 22 from slipping. Of course, the outer surface of the roller 22 can also adopt other structural forms that are beneficial to the rolling of the roller 22. For example, the surface friction coefficient of the roller 22 can be increased, or a U-shaped opening can be formed on the outer surface of the roller 22, and convex structures can be arranged on the side walls of the U-shaped opening to increase the friction force between the roller 22 and the rope 100.

[0094] According to the embodiment of the present invention, the rope 100 can be a steel wire rope, a chain, or other structural forms as long as it is suitable for an operator or a lifting device to lift or lower along it.

[0095] Please refer to Figure 8 , Figure 10 and Figures 13 to 15 , when a falling event occurs, the rope locking device moves downward relative to the rope 100 ( Figure 10 the downward arrow direction in shows the movement direction of the rope locking device relative to the rope), at this time the roller 22 rotates along the Figure 10 counterclockwise arrow direction in. There is a pressing force F1 between the roller 22 and the rope 100, and there is a friction force F2 acting between the rope 100 and the roller 22, causing the roller 22 to rotate counterclockwise. While the roller 22 rotates, it drives the rotating shaft 25 to also rotate counterclockwise. Under the action of centrifugal force, the centrifugal flyweight 23 hinged on the boss 252 rotates around the pin shaft 29. Please refer to Figure 13 , Figure 13The dashed line in the figure shows the position of the centrifugal flyweight 23 in the centrifugal state. The first step surface of the centrifugal flyweight 23 contacts the second step surface of the inner surface of the drum 26, generating a force F3 to the drum 26 to make it rotate counterclockwise. Due to the mating relationship between the drum 26 and the end cover 28, a upward driving force F4 is generated on the connecting rod 21 at the hinge shaft 283 of the end cover 28, so as to drive the connecting rod 21 to move upward. The connecting rod 21 generates an upward force F5 at the position connected to the locking member 11, and F5 drives the locking member 11 to rotate counterclockwise until the locking member 11 engages with the rope 100, realizing the locking function of the rope locking device. Figure 15 In the figure, the rotation direction of the locking member 11 corresponds to the swinging direction of the locking member 11; the vertically upward direction of the connecting rod 21 refers to the upward movement of the connecting rod 21 to drive the locking member 11.

[0096] In one embodiment, the locking member 11 adopts the structural form of an irregular lock block. Of course, the structural form of the locking member 11 is limited by the examples here. It can also adopt a regular structural form, or any other irregular structural form, as long as it can realize the unlocking and locking of the rope 100.

[0097] In one embodiment, please refer to Figure 16 and Figure 17 , the rope clamping device 30 includes a base 31, a rope clamping plate 32, a button 33, a cap 34 and a second compression spring 35. The rope clamping plate 32 is connected to the base 31 by socket head cap screws M3×8 and M3 nuts. The button 33 is in a T shape. The shaft part of the button 33 passes through the hole on the base 31, and the second compression spring 35 is sleeved on the shaft part of the button 33 from the other side and locked with the cap 34.

[0098] According to an embodiment of the present invention, the rope locking device includes a speed measuring component 20, and the speed measuring component 20 includes components such as a roller 22, a bearing 27, a rotating shaft 25, a centrifugal flyweight 23, a drum 26, an end cover 28 and a connecting rod 21.

[0099] According to an embodiment of the present invention, the installation positions of the locking member 11 and the roller 22 are not limited. As long as the rolling speed of the roller 22 along the rope 100 reaches the set speed, the centrifugal member installed on the rotating shaft 25 can transmit the movement to the locking member 11. For example, Figure 7 in the figure, the locking member 11 is located above the roller 22, Figure 18 in the figure, the locking member 11 and the roller 22 are respectively located on both sides of the rope 100.

[0100] Please refer to Figures 18 to 23 , the connecting rod 21 of the embodiment of the present invention is formed on the end cover 28. The connecting rod 21 is formed with a first trigger surface, and the locking member 11 is formed with a second trigger surface that cooperates with the connecting rod 21. The first trigger surface and the second trigger surface are arranged opposite to each other.

[0101] According to an embodiment of the present invention, under the action of gravity, the locking member 11 and the connecting rod 21 do not interact with each other under normal circumstances, and at this time the locking member 11 is in an unlocked state. Only when the speed of the roller 22 is relatively high, the connecting rod 21 rotates under the action of the centrifugal member to drive the locking member 11 to rotate to the locked state. Of course, it should be noted that the connecting rod 21 is not an essential component. For example, a limiting fit can also be directly formed between the drum 26 and the locking member 11, so that when the drum 26 rotates, the locking member 11 can be driven to rotate to the locked position.

[0102] The above embodiments are only used to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications, or equivalent replacements of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and should all be covered within the scope of the claims of the present invention.

Claims

1. A rope locking device, characterized in that, Comprising: A locking member (11) adapted to switch between a locked state and an unlocked state with respect to a rope (100); A roller (22) adapted to be pressed against the surface of the rope (100) under the action of a pressing member; A rotating shaft (25) adapted to rotate with the roller (22); A centrifugal member mounted on the rotating shaft (25) and rotating with the rotating shaft (25), the centrifugal member switching between a centrifugal state and a reset state according to the change of centrifugal force; A driving member, in the centrifugal state, the centrifugal member drives the driving member to move, so that the locking member (11) moves to the locked state, and in the reset state, the centrifugal member is disengaged from the driving member, so that the locking member (11) is in the unlocked state; A bearing (27), the bearing (27) includes an inner bearing ring and an outer bearing ring; The roller (22) is formed with a receiving cavity, and the outer bearing ring is installed in the receiving cavity; The driving member includes a drum (26), the drum (26) is installed on the inner bearing ring, in the centrifugal state, the centrifugal member and the inner surface of the drum (26) form a limiting fit, so that when the centrifugal member rotates, it drives the drum (26) to rotate, and the drum (26) drives the locking member (11) to move to the locked state; The driving member further includes: An end cap (28) for closing the opening of the receiving cavity, the end cap (28) is formed with a first limiting portion, and the drum (26) is formed with a second limiting portion matching the first limiting portion, so that the end cap (28) rotates with the drum (26); A connecting rod (21), one end is hinged to the end cap (28), and the other end is adapted to rotate with the end cap (28) to drive the locking member (11) to move to the locked state; The centrifugal member is a centrifugal flyweight (23).

2. The rope locking device according to claim 1, characterized in that, The first end of the centrifugal flyweight (23) is hinged to the rotating shaft (25), the second end of the centrifugal flyweight (23) is formed with a first stepped surface, and the centrifugal flyweight (23) is connected with a tension spring (24). In the centrifugal state, the tension spring (24) is in a stretched state, and in the reset state, the tension spring (24) is in a natural state; The inner surface of the drum (26) is formed with a second stepped surface, and in the centrifugal state, the first stepped surface and the second stepped surface are in limiting fit.

3. The rope locking device according to claim 2, characterized in that, There are two centrifugal flyweights (23) arranged along the circumferential direction of the rotating shaft (25); The second ends of the two centrifugal flyweights (23) are connected by the tension spring (24) passing through the rotating shaft (25); The rotating shaft (25) is formed with two symmetrically arranged bosses (252), and the first ends of the two centrifugal flyweights (23) are respectively hinged to one of the bosses (252).

4. The rope locking device according to any one of claims 1 to 3, characterized in that, The roller (22) includes a third limiting portion, and the rotating shaft (25) is formed with a fourth limiting portion matching the third limiting portion, so that the rotating shaft (25) rotates with the roller (22).

5. The rope locking device according to any one of claims 1 to 3, characterized in that, Further comprising: A housing (40), the locking member (11), the roller (22), the rotating shaft (25), the centrifugal member and the driving member are all installed inside the housing (40); The swing rod (10) has one end extending into the housing (40) and the other end extending out of the housing (40), and the swing rod (10) is adapted to switch between a first position for driving the locking member (11) to lock the rope (100) and a second position for disengaging from the locking member (11).

6. The rope locking device according to claim 5, characterized in that, The pressing member is a first compression spring (70), the housing (40) is connected to the first end of the first compression spring (70), and the second end of the first compression spring (70) presses the roller (22) against the surface of the rope (100); The rope locking device further includes: A roller (60) is arranged corresponding to the roller (22) such that the rope (100) is located between the roller (22) and the roller (60).

7. The rope locking device according to any one of claims 1 to 3, characterized in that The locking member (11) and the roller (22) are distributed along the length direction of the rope (100).

8. The rope locking device according to any one of claims 1 to 3, characterized in that, The locking member (11) and the roller (22) are located on both sides of the rope (100).

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