Rope locking device

Abstract

The present invention relates to the field of safety protection technology, and provides a rope locking device, comprising: a friction wheel pair, comprising two friction wheels with friction surfaces arranged opposite to each other, the friction surfaces of the two friction wheels being used to clamp the rope; a centrifugal part, suitable for switching between a centrifugal state and a reset state as the rotation speed of the friction wheel pair changes; a spindle, in the centrifugal state, the centrifugal part is suitable for reaching a working position to drive the spindle to rotate, and in the reset state, the centrifugal part and the spindle are separated; two friction wheels are respectively installed at both ends of the spindle; a locking part, located between the two friction surfaces, arranged on the spindle and suitable for rotating with the spindle, so that the locking part switches between a locked state and an unlocked state with the rope; in the centrifugal state, the spindle is suitable for driving the locking part to move to a locked state; in the reset state, the locking part is in an unlocked state. This kind of rope locking device can effectively avoid locking failure, ensure the reliability of the fall protection function, and avoid casualties.

Description

Technical Field

[0001] The 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, working in high-altitude climbing environment and high-altitude transportation are extremely common. In the wind power, construction and other industries, in order to ensure the construction safety of high-altitude workers, reliable anti-fall equipment must be installed. The rope locking device is an important anti-fall device that connects the rope and the workers in this industry. Through the rope locking device, the workers can move freely and safely along the length of the rope. The structure of the rope locking device in the prior art can be found in Figures 1 to 4 . Figure 1 and Figure 2 When a person falls, the safety hook 003 pulls the driving rod 001, causing the lock surface on the driving rod 001 to swing toward the direction of the rope until the lock surface and the rope are tightly engaged, thereby locking the person and preventing the person from continuing to fall. Figure 3 and Figure 4 In the figure, one end of the driving rod 001 can trigger the locking block 002, so that the locking block 002 swings synchronously with the rotation of the driving rod 001. When a fall occurs, the person falls and drives the safety hook 003 to move, so that the driving rod 001 rotates and drives the locking block 002 and the wire rope to bite tightly, thereby playing a locking role.

[0003] The rope locking device in the prior art uses a driving rod 001 as a triggering component of the locking member. When a fall occurs, a person may grab the driving rod 001 unconsciously in a panic, causing the rope locking device to be in a state of being locked. Figure 5 or Figure 6 In the state shown, the driving rod 001 cannot rotate, so that the rope locking device cannot be locked in time, and the safety protection for personnel is lost, resulting in a serious accident with casualties. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a rope locking device, which can drive the locking member and the rope to lock when the movement speed of the friction wheel pair relative to the rope reaches a set value, thereby avoiding the protection loophole existing when the traditional swing lever triggers the locking, making the protection function safer and more reliable.

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

[0006] A friction wheel pair, comprising two friction wheels with friction surfaces facing each other, wherein the friction surfaces of the two friction wheels are used for clamping ropes;

[0007] A centrifugal member, adapted to switch between a centrifugal state and a reset state as the rotation speed of the friction wheel pair changes;

[0008] The spindle, in the centrifugal state, the centrifugal member is suitable for reaching a working position to drive the spindle to rotate, and in the reset state, the centrifugal member and the spindle are separated; the two friction wheels are respectively installed at both ends of the spindle;

[0009] A locking member, located between the two friction surfaces, disposed on the main shaft and adapted to rotate with the main shaft, so that the locking member switches between a locked state and an unlocked state with the rope;

[0010] In the centrifugal state, the main shaft is suitable for driving the locking member to move to the locking state; in the reset state, the locking member is in the unlocking state.

[0011] According to the rope locking device of the embodiment of the present invention, the centrifugal part switches between the centrifugal state and the reset state based on the rotation speed of the friction wheel pair. When a fall occurs, the rotation speed of the friction wheel pair is high, and the centrifugal force of the centrifugal part is large. Then the centrifugal part switches to the centrifugal state, driving the main shaft to move, and the locking part switches to the locked state under the action of the main shaft, ensuring the safety of personnel. This type of rope locking device can effectively solve the locking failure caused by external factors, ensure the reliability of the fall protection function, and the lifting equipment with this type of rope locking device is safer to use and can avoid casualties.

[0012] According to one embodiment of the present invention, it also includes:

[0013] A roller sleeve, which corresponds to the friction wheel one by one and is coaxially arranged with the friction wheel, and the roller sleeve is suitable for rotating with the friction wheel;

[0014] The centrifugal member is installed on the rolling sleeve.

[0015] According to one embodiment of the present invention, a mounting hole is formed at the center of the friction wheel, and a first limiting portion is formed in the mounting hole;

[0016] The rolling sleeve is formed with a second limiting portion, and the first limiting portion and the second limiting portion cooperate with each other so that the rolling sleeve rotates with the friction wheel.

[0017] According to one embodiment of the present invention, it also includes:

[0018] The roller assembly corresponds to the friction wheel one by one and is coaxially arranged with the friction wheel, and comprises a roller body and an end cover arranged at the end of the roller body and rotating with the roller body; the roller body is sleeved outside the roller sleeve, and the inner surface of the roller body is formed with a first step surface;

[0019] The centrifugal member is a centrifugal throw block, which is installed between the roller sleeve and the drum body, and the first end of the centrifugal throw block is hinged to the roller sleeve, and the second end of the centrifugal throw block is formed with a second step surface; in the centrifugal state, the first step surface and the second step surface are limitedly matched, and in the reset state, the first step surface and the second step surface are separated; the second end of the centrifugal throw block is connected to a tension spring, and 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] Both ends of the main shaft are mounted on the end cover and are suitable for rotating with the end cover.

[0021] According to an embodiment of the present invention, a snap-fitting protrusion is formed at the end of the drum body, and a snap-fitting groove matched with the snap-fitting protrusion is formed on the end cover, so that the end cover rotates with the drum body.

[0022] According to one embodiment of the present invention, it also includes:

[0023] The bearing comprises a bearing inner ring, and the roller body is mounted on the bearing inner ring.

[0024] According to one embodiment of the present invention, it also includes:

[0025] A protective shell, comprising a first shell and a second shell;

[0026] A first compression spring, a first end of which is mounted on the inner wall of the first housing, and a second end of which abuts against a rope clamp, so that the rope clamp and the friction wheel pair clamp the rope;

[0027] The friction wheel pair is installed between the first shell and the second shell.

[0028] According to an embodiment of the present invention, a second compression spring is installed between the first housing and one of the friction wheels, and between the second housing and the other friction wheel, and the second compression spring is compressed to press the rope toward the friction wheel.

[0029] According to an embodiment of the present invention, the friction wheel comprises a friction wheel plate and friction teeth formed at the outer edge of the friction wheel plate, and the thickness of the friction teeth gradually increases toward the center direction of the friction wheel plate.

[0030] According to an embodiment of the present invention, the locking member includes a mounting portion sleeved on the main shaft and a friction locking portion connected to the mounting portion.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] Figure 1 It is a schematic diagram of the working state of the rope locking device of the prior art when the driving rod and the rope are tightly bitten;

[0034] Figure 2 It is a schematic diagram of the working state of the rope locking device of the prior art when the driving rod and the rope are loosened;

[0035] Figure 3 It is a schematic diagram of the working state of the rope locking device of the prior art when the locking block and the rope are loosened;

[0036] Figure 4 It is a schematic diagram of the working state of the rope locking device of the prior art when the locking block and the rope are engaged;

[0037] Figure 5 It is a schematic diagram of the working state of a rope locking device including a locking block in the prior art formed due to misoperation when a fall event occurs;

[0038] Figure 6 It is a schematic diagram of the working state of the rope locking device of the prior art formed due to misoperation when a fall event occurs;

[0039] Figure 7 is a schematic diagram of the assembly relationship between the rope locking device and the rope according to an embodiment of the present invention;

[0040] Figure 8 is a partial explosion schematic diagram of a rope locking device according to an embodiment of the present invention;

[0041] Fig. 9 is a schematic diagram of the assembly relationship between the locking member and the main shaft in an embodiment of the present invention;

[0042] Fig.10 is a schematic diagram of the assembly relationship of the friction wheel pair according to an embodiment of the present invention;

[0043] Fig.11 is a schematic diagram of the assembly relationship between the friction wheel, the roller assembly and the main shaft in an embodiment of the present invention;

[0044] Fig.12 is a schematic structural diagram of a friction surface and a rope in contact with each other according to an embodiment of the present invention;

[0045] Fig.13 is a schematic diagram of the installation of a rope locking device in an embodiment of the present invention;

[0046] Fig.14 is a schematic diagram of the installation of another rope locking device according to an embodiment of the present invention;

[0047] Fig.15 is a schematic diagram of the installation of another rope locking device according to an embodiment of the present invention;

[0048] Fig.16 is a schematic diagram of the installation of another rope locking device according to an embodiment of the present invention;

[0049] Reference numerals:

[0050] 001, driving rod; 002, locking block; 003, safety hook;

[0051] 10. swing rod; 11. locking member; 111. fitting hole; 112. first plane; 100. rope;

[0052] 20. Speed ​​measuring assembly; 21. Friction wheel; 211. Mounting hole; 212. First limiting surface; 213. Friction tooth; 22. Main shaft; 221. Second plane; 222. Fourth limiting surface; 23. Centrifugal block; 231. Fixing hole; 232. Second hinge hole; 24. Tension spring; 25. Roller sleeve; 251. Second limiting surface; 252. First hinge hole; 26. Roller body; 261. Snap-fitting protrusion; 27. Bearing; 28. End cover; 281. Snap-fitting groove; 282. Through hole; 283. Third limiting surface; 29. ​​Pin;

[0053] 30. Rope clamp; 31. Base;

[0054] 40. first shell; 50. second shell;

[0055] 60. Second compression spring;

[0056] 70. First compression spring. DETAILED DESCRIPTION

[0057] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0058] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0059] 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 "connection" 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 a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0060] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0061] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0062] See also Figures 7 to 16According to an embodiment of the present invention, the rope locking device comprises a friction wheel pair, a centrifugal part, a main shaft 22 and a locking part 11. The friction wheel pair comprises two friction wheels 21 with friction surfaces arranged opposite to each other, and the friction surfaces of the two friction wheels 21 are used to clamp the rope 100; the centrifugal part is suitable for switching between a centrifugal state and a reset state as the rotation speed of the friction wheel pair changes; in the centrifugal state, the centrifugal part is suitable for reaching a working position to drive the main shaft 22 to rotate, and in the reset state, the centrifugal part and the main shaft 22 are separated; the locking part 11 is located between the two friction surfaces, and the locking part 11 is arranged on the main shaft 22, so that the locking part 11 can rotate with the main shaft 22, so that the locking part 11 can switch between the locked state and the unlocked state with the rope 100. When the centrifugal part is in the centrifugal state, the main shaft 22 can drive the locking part 11 to move to the locked state; when the centrifugal part is in the reset state, the locking part 11 is in the unlocked state.

[0063] According to the rope locking device of the embodiment of the present invention, the centrifugal part switches between the centrifugal state and the reset state based on the rotation speed of the friction wheel pair. When a fall occurs, the rotation speed of the friction wheel pair is high, and the centrifugal force of the centrifugal part is large, so the centrifugal part switches to the centrifugal state. When the centrifugal part in the centrifugal state reaches the working position, it can drive the main shaft 22 to move, and the locking part 11 switches to the locked state under the action of the main shaft 22, thereby ensuring the safety of personnel. This type of rope locking device can effectively solve the locking failure caused by external factors, ensure the reliability of the fall protection function, and the lifting equipment with this type of rope locking device is safer to use and can avoid casualties.

[0064] According to an embodiment of the present invention, the rotation speed of the friction wheel pair can reflect the current falling speed. When the falling speed is too fast and reaches the set speed, the friction wheel pair will drive the centrifugal part to switch to the centrifugal state to achieve the locking of the locking part 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 in accelerated falling will drive the friction wheel pair to accelerate relative to the rope 100 until the friction wheel pair reaches the set speed. At this time, the centrifugal part drives the main shaft 22 to rotate, and the main shaft 22 drives the locking part 11 to achieve locking to prevent 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 003 for connecting with the operator. Of course, the rope locking device can also be installed between the rope 100 and the elevator (or other lifting equipment other than the elevator).

[0065] According to an embodiment of the present invention, "the locked state and the unlocked state with the rope 100" respectively refer to: the locking member 11 is locked to the rope 100, and the relative movement resistance between the locking member 11 and the rope 100 is very large or even unable to move relative to each other, and the relative movement between the locking member 11 and the rope 100 has almost no resistance or very small resistance.

[0066] According to an embodiment of the present invention, "in the centrifugal state, the main shaft 22 is suitable for driving the locking member 11 to move to the locked state", which means that the centrifugal member can move to the working position in the centrifugal state, and then the centrifugal member that reaches the working position can drive the main shaft 22 to move, and it is not required that the centrifugal member must be able to drive the main shaft 22 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, and then when the centrifugal member is in the critical state but the centrifugal force has not reached the critical value, power transmission between the centrifugal member and the drive may not be performed at this time.

[0067] See also Figure 8 According to an embodiment of the present invention, the rope locking device includes a roller sleeve 25. The roller sleeve 25 corresponds to the friction wheel 21 one by one and is coaxially arranged with the friction wheel 21, and the roller sleeve 25 is suitable for rotating with the friction wheel 21. That is, corresponding to the situation where there are two friction wheels 21, there are also two roller sleeves 25, and the roller sleeve 25 rotates synchronously with the friction wheel 21. On this basis, the centrifugal part is installed on the roller sleeve 25, and then the friction wheel 21 can drive the centrifugal part to rotate through the roller sleeve 25, so that the centrifugal part switches to the centrifugal state when the speed reaches the set value.

[0068] In one embodiment, in order to enable the friction wheel 21 to drive the roller sleeve 25 to rotate, a mounting hole 211 is formed at the center of the friction wheel 21, and a first limiting portion is formed in the mounting hole 211; a second limiting portion is formed in the roller sleeve 25, and the first limiting portion and the second limiting portion cooperate with each other so that the roller sleeve 25 rotates with the friction wheel 21. For example, the first limiting portion can be a first limiting surface 212 formed on the side wall of the mounting hole 211, and the second limiting portion can be a second limiting surface 251 formed on the outer surface of the roller sleeve 25. In order to ensure that the inner surface of the mounting hole 211 and the outer surface of the roller sleeve 25 are subjected to uniform force, the number of the first limiting surface 212 and the second limiting surface 251 can be multiple and one-to-one corresponding. Among them, when there are multiple first limiting surfaces 212 and second limiting surfaces 251 respectively, the multiple first limiting surfaces 212 are evenly arranged along the circumference of the mounting hole 211, and similarly, the second limiting surface 251 is evenly arranged along the outer surface of the roller sleeve 25.

[0069] In order to ensure that the roller sleeve 25 rotates with the friction wheel 21, in addition to providing various structures matching the first limiting part and the second limiting part, the roller sleeve 25 and the friction wheel 21 can be directly formed into one piece, or the roller sleeve 25 and the friction wheel 21 can be fixed together by welding or threaded connection. When the friction wheel 21 and the roller sleeve 25 are matched by the first limiting part and the second limiting part, they can be easily disassembled.

[0070] It is worth mentioning that the roller sleeve 25 may not be provided, for example, the centrifugal member may be directly mounted on the friction wheel 21, so that the centrifugal member is driven to rotate when the friction wheel 21 rotates. For example, the centrifugal member is hinged to the friction wheel 21, so that the centrifugal member can be switched to a centrifugal state under the centrifugal force of the friction wheel 21.

[0071] According to an embodiment of the present invention, the rope locking device further comprises a roller assembly. The roller assembly corresponds to the friction wheel 21 one by one and is coaxially arranged with the friction wheel 21, that is, when there are two friction wheels 21, there are also two sets of roller assemblies. The roller assembly comprises a roller body 26 and an end cover 28 disposed at the end of the roller body 26 and rotating with the roller body 26; the roller body 26 is sleeved outside the roller sleeve 25, and the main shaft 22 is installed on the end cover 28 and is suitable for rotating with the end cover 28.

[0072] In this case, the centrifugal element transmits the motion to the end cover 28 through the roller body 26, and transmits the motion to the main shaft 22 through the end cover 28. That is, when the centrifugal element is in the centrifugal state, it drives the roller body 26 to rotate, and then drives the end cover 28 to rotate. When the centrifugal element is in the reset state, the centrifugal element is attached to the outer surface of the roller sleeve 25.

[0073] In one embodiment, the roller assembly is located on the outer side of the friction wheel 21. The outer side of the friction wheel 21 refers to the side facing away from the other friction wheel 21. Figure 8 , the outer side of the left friction wheel 21 refers to its left side, and the outer side of the right friction wheel 21 refers to its right side. In this case, the space between the two friction wheels 21 is more compact, which makes it easier to clamp the rope 100 on the two friction surfaces, ensuring that when the rope locking device moves up and down along the rope 100, the friction wheel 21 rolls relative to the rope 100 to avoid slipping. Of course, the roller assembly can also be arranged on the inner side of the friction wheel 21.

[0074] In one embodiment, the inner surface of the drum body 26 is formed with a first step surface; the centrifugal member is a centrifugal block 23, and the surface of the centrifugal block 23 facing the drum body 26 is formed with a second step surface. Specifically, the centrifugal block 23 is installed between the roller sleeve 25 and the drum 26, and the first end of the centrifugal block 23 is hinged to the roller sleeve 25, and the second end of the centrifugal block 23 is formed with a second step surface. In the centrifugal state, the first step surface and the second step surface are limitedly matched, so that the centrifugal block 23 can drive the drum body 26 to rotate. In the reset state, the first step surface and the second step surface are disengaged, and then the drum 26 hardly rotates at this time, so that the end cover 28 and even the main shaft 22 hardly rotate, so that the locking member 11 is in an unlocked state. Of course, the structural form of the centrifugal member is not limited by the example given here. For example, the centrifugal member can also be in the form of a centrifugal rod, and then when the rotation speed of the roller sleeve 25 reaches the set speed, a limited fit is formed between the centrifugal rod and the drum 26, so that the roller sleeve 25 drives the drum 26 to rotate through the centrifugal member; or, the centrifugal member can also be in other structural forms. Furthermore, the cooperation between the first step surface and the second step surface can ensure the structural strength of the position of the limited cooperation. Obviously, the mode of limited cooperation is not limited to the cooperation of the step surfaces.

[0075] In one embodiment, see Figure 8 , the centrifugal block 23 is divided into two pieces and arranged along the circumference of the roller sleeve 25; wherein the second end of each centrifugal block 23 is connected to the hinge of the first end of another centrifugal block 23 through a tension spring 24. Furthermore, the setting of the tension spring 24 ensures that the centrifugal block 23 can be automatically reset, and ensures that the rope locking device can normally rise and fall along the rope 100 under normal circumstances. Only when the speed of the rope locking device exceeds the normal speed, the locking member 11 and the rope 100 are driven to lock. Specifically, the second end of the centrifugal block 23 moves in a direction away from the roller sleeve 25 under the action of centrifugal force, and the tension spring 24 is stretched at this time. When the speed of the roller sleeve 25 decreases, once the restoring force of the tension spring 24 is greater than the centrifugal force of the second end of the centrifugal block 23, the second end of the centrifugal block 23 moves in a direction close to the roller sleeve 25 under the action of the restoring force of the tension spring 24, so that no motion is transmitted between the centrifugal block 23 and the inner surface of the drum 26.

[0076] In one embodiment, two centrifugal blocks 23 are surrounded on the outside of the roller sleeve 25, and the forces on the two centrifugal blocks 23 are substantially the same, so that when the centrifugal blocks 23 drive the roller 26 to rotate, the forces on the roller 26 can be balanced. Of course, the number of centrifugal blocks 23 is not limited by the example given here, for example, in order to increase the force area between the centrifugal member and the roller 26, the number of centrifugal blocks 23 can be increased.

[0077] Among them, "the second end of the centrifugal throwing weight 23" is only a relative concept of "the first end of the centrifugal throwing weight 23". Figure 8In the embodiment, the region where the centrifugal block 23 and the roller sleeve 25 are hinged is the first end of the centrifugal block 23, and the region downstream of the first end of the centrifugal block 23 along the counterclockwise direction can be referred to as the second end of the centrifugal block 23. For example, Figure 8 The second step surface is formed at the middle position of the centrifugal block 23 , and the middle position can also be defined as the second end of the centrifugal block 23 .

[0078] See also Figure 8 , the number of the corresponding centrifugal blocks 23 is two, the roller sleeve 25 is formed with two symmetrically arranged bosses, and the first ends of the two centrifugal blocks 23 are respectively hinged to one boss through a pin 29. The installation of the centrifugal blocks 23 can be facilitated by the arrangement of the bosses.

[0079] In one embodiment, an arc-shaped mounting groove is formed on the inner surface of the centrifugal block 23, and then the boss is at least partially embedded in the arc-shaped mounting groove, and it is ensured that there is no interference between the centrifugal block 23 and the boss. On this basis, the first hinge hole 252 on the boss corresponds to the second hinge hole 232 on the centrifugal block 23, and then the pin 29 can be passed through the two hinge holes 232 and the first hinge hole 252 in sequence. In addition, the first end of the tension spring 24 is installed on the pin 29, and the second end of the tension spring 24 passes through the through hole of another centrifugal block 23, and is fixed by a fixed shaft passing through the fixing hole 231. In this case, the tension spring 24 is easy to disassemble and assemble. Of course, in order to realize the installation of the tension spring 24, the through hole and the fixed shaft are not necessary components, and other methods can also be used to realize the fixation between the tension spring 24 and the centrifugal block 23.

[0080] In one embodiment, the drum body 26 and the end cover 28 are buckled, for example, a buckling protrusion 261 is formed at the end of the drum body 26 facing the end cover 28, and a buckling groove 281 is formed at the end cover 28. The positions of the buckling protrusion 261 and the buckling groove 281 can also be interchanged, that is, the buckling groove 281 is formed at the end of the drum body 26, and the buckling protrusion 261 is formed at the end cover 28. Of course, the drum body 26 and the end cover 28 can also be integrally formed to ensure that the drum body 26 can drive the end cover 28 to rotate, or the drum body 26 and the end cover 28 can also be used to transmit motion through other mutually matching limiting parts.

[0081] In one embodiment, a through hole 282 is formed on the end cover 28, and the main shaft 22 is installed in the through hole 282. The through hole 282 can be a non-circular hole, that is, the through hole 282 on the end cover 28 for assembling the main shaft 22 is formed with a third limiting surface 283; the main shaft 22 includes a non-circular segment, and the non-circular segment is formed with a fourth limiting surface 222, and the structures of the third limiting surface 283 and the fourth limiting surface 222 are adapted, and then through the cooperation between the non-circular hole and the non-circular segment, it can be ensured that the main shaft 22 rotates when the end cover 28 rotates. And in this case, the end cover 28 and the main shaft 22 are easy to disassemble and assemble. Of course, in order to enable the end cover 28 to drive the main shaft 22 to rotate, the end cover 28 and the main shaft 22 can also be fixed by threaded connection or other connection methods.

[0082] According to an embodiment of the present invention, the rope locking device includes a speed measuring assembly 20, wherein the speed measuring assembly 20 includes components such as a friction wheel pair, a roller sleeve 25, a centrifugal swing weight 23, a roller assembly and a main shaft 22.

[0083] In one embodiment, the rope locking device further comprises a bearing 27 , the bearing 27 comprises a bearing inner ring, and the drum 26 is mounted on the bearing inner ring.

[0084] In one embodiment, the rope locking device further includes a protective shell, a first compression spring 70 and a rope clamp 30. The protective shell includes a first shell 40 and a second shell 50; the first end of the first compression spring 70 is mounted on the inner wall of the first shell 40, and the second end of the first compression spring 70 abuts against the rope clamp 30, so that the rope clamp 30 and the friction wheel pair clamp the rope 100; the friction wheel pair is mounted between the first shell 40 and the second shell 50. According to the rope locking device of the embodiment of the present invention, since the protective shell includes the first shell 40 and the second shell 50, it is convenient to install components such as the friction wheel pair, the centrifugal member, the main shaft 22, the roller sleeve 25 and the roller 26 into the protective shell. In addition, since the second end of the first compression spring 70 abuts against the rope clamp 30, the rope clamp 30 applies a force to the rope 100, so that the rope 100 is clamped between the two friction wheels 21, and the friction surface of the friction wheel 21 is ensured to be in full contact with the rope 100.

[0085] In one embodiment, the rope gripper 30 includes a base 31, and the rope 100 is installed between the base 31 and the friction wheel pair.

[0086] In one embodiment, see Figure 7 A second compression spring 60 is installed between the first housing 40 and one of the friction wheels 21, and between the second housing 50 and the other friction wheel 21. The second compression spring 60 is compressed to press the rope 100 toward the friction wheel 21. By setting the second compression spring 60, it can be ensured that the friction surfaces of the two friction wheels 21 fully contact the rope 100, thereby ensuring the friction between the friction wheel 21 and the rope 100.

[0087] In one embodiment, see Figure 7 and Figure 8 The friction wheel 21 includes a friction wheel plate and friction teeth 213 formed at the outer edge of the friction wheel plate (the friction teeth 213 refer to Fig.12 ), the thickness of the friction teeth 213 gradually increases toward the center of the friction wheel. That is, when the rope 100 is moved toward the two friction surfaces by the force of the rope clamp 30, the closer it is to the center of the friction wheel 21, the smaller the distance between the two corresponding friction teeth 213, and thus the greater the clamping force on the rope 100, the greater the friction between the rope 100 and the friction wheel 21. Among them, the number of friction teeth 213 is multiple and evenly distributed along the circumference of the friction wheel 21 to ensure that the friction force of the rope 100 on the friction wheel 21 is stable. Of course, the number, distribution and structure of the friction teeth 213 are not limited to the examples given here. In addition, the friction teeth 213 may not be provided, for example, the friction surface of the friction wheel 21 may be a frosted surface to ensure the size of the friction force.

[0088] In one embodiment, the locking member 11 is a locking block, including a mounting portion that is mounted on the main shaft 22 and a friction locking portion connected to the mounting portion. The mounting portion is formed with a mounting hole 111, and a first plane 112 is formed on the inner surface of the mounting hole 111, so that when the mounting portion is mounted on the main shaft 22, it matches with a second plane 221 on the main shaft 22, ensuring that the main shaft 22 can drive the locking block to rotate. Of course, the structural form of the locking member 11 is not limited by the distance here, as long as it can be used to achieve locking between the rope 100.

[0089] Since the locking member 11 is located between the two friction wheels 21, and the important components of the rope locking device, such as the friction wheels 21, the roller sleeve 25, the roller assembly, the locking member 11 and the main shaft 22, almost all rotate around the same axis, the rope locking device occupies very little space. In addition, the rope locking device of the embodiment of the present invention has a compact structure and reliable motion transmission, which can ensure safety in use to the greatest extent.

[0090] In one embodiment, the rope locking device further comprises a swing rod 10, one end of the swing rod 10 extends into the protective shell, and the other end extends out of the protective shell, 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. The setting of the swing rod 10 ensures that the rope locking device has a manual locking function, and thus the rope locking device has a dual protection function. Under normal circumstances, as long as the swing rod 10 is manually swung, the locking member 11 can be driven to move to a locked state, so that the friction wheel pair of the rope locking device cannot roll relative to the rope 100. Under special circumstances, even if the operator fails to operate the swing rod 10 correctly due to panic, since the friction wheel pair itself is equivalent to having a speed measurement function, once the friction wheel pair exceeds the set speed during movement, the centrifugal member controls the locking member 11 to move to a locked state through the main shaft 22, thereby ensuring the locking reliability.

[0091] See also Figure 7 , the second compression spring 60 generates a pressure F0 on the friction wheel 21, so that the two friction wheels 21 apply a clamping force F1 to the rope 100. For further information, please refer to Figures 13 to 16 When the rope locking device rotates along the rope 100, the friction wheel 21 rotates along the rope 100 relative to the rope 100. Fig.13 The rope 100 moves in the downward arrow direction, and the rope 100 is subjected to the friction force F2, so that the friction wheel 21 moves along Fig.13 The counterclockwise arrow rotates counterclockwise; due to the cooperation between the mounting hole 211 on the friction wheel 21 and the roller sleeve 25, the friction wheel 21 can drive the roller sleeve 25 to make a counterclockwise circular motion. Under the action of centrifugal force, the centrifugal block 23 hinged to the roller sleeve 25 through the boss moves around the roller sleeve 25 until a limit fit is formed between the first step surface of the roller body 26 and the second step surface of the centrifugal block 23, at which time the centrifugal block 23 applies a force of F3 to the roller body 26. Furthermore, due to the cooperation between the roller body 26 and the end cover 28 through the buckling protrusion 261 and the buckling groove 281, the roller body 26 applies a force of F4 to the end cover 28 at the buckling protrusion 261 to ensure that the end cover 28 rotates with the roller body 26. Since the end cover 28 and the main shaft 22 are matched through the non-circular hole and the non-circular segment, a force F5 is generated at the position of the non-circular hole and the non-circular segment, ensuring that the main shaft 22 rotates with the end cover 28 until the locking piece 11 and the rope 100 are engaged together, thereby realizing the locking function of the rope locking device.

[0092] The above embodiments are only used to illustrate the present invention, but not to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalent substitutions 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 be included in the scope of the claims of the present invention.

Claims

1. A rope locking device, characterized in that: include: A friction wheel pair, comprising two friction wheels (21) with friction surfaces arranged opposite to each other, wherein the friction surfaces of the two friction wheels (21) are used for clamping a rope (100); A centrifugal member, adapted to switch between a centrifugal state and a reset state as the rotation speed of the friction wheel pair changes; A main shaft (22), wherein in the centrifugal state, the centrifugal member is adapted to reach a working position to drive the main shaft (22) to rotate, and in the reset state, the centrifugal member and the main shaft (22) are separated; the two friction wheels (21) are respectively mounted at two ends of the main shaft (22); A locking member (11) is located between the two friction surfaces, is disposed on the main shaft (22) and is adapted to rotate with the main shaft (22) so that the locking member (11) switches between a locked state and an unlocked state with the rope (100); in the centrifugal state, the main shaft (22) is adapted to drive the locking member (11) to move to the locked state; in the reset state, the locking member (11) is in the unlocked state; A protective shell, comprising a first shell (40) and a second shell (50); a first compression spring (70), a first end of which is mounted on the inner wall of the first housing (40), and a second end of which abuts against the rope clamp (30), so that the rope clamp (30) and the friction wheel pair clamp the rope (100); The friction wheel pair is installed between the first housing (40) and the second housing (50).

2. The rope locking device according to claim 1, characterized in that: Also includes: a rolling sleeve (25), corresponding one to one with the friction wheel (21) and arranged coaxially with the friction wheel (21), and the rolling sleeve (25) is suitable for rotating with the friction wheel (21); The centrifugal element is mounted on the rolling sleeve (25).

3. The rope locking device according to claim 2, characterized in that: A mounting hole (211) is formed at the center of the friction wheel (21), and a first limiting portion is formed in the mounting hole (211); The rolling sleeve (25) is formed with a second limiting portion, and the first limiting portion and the second limiting portion cooperate with each other so that the rolling sleeve (25) rotates along with the friction wheel (21).

4. The rope locking device according to claim 2, characterized in that: Also includes: A roller assembly, corresponding to the friction wheel (21) one by one and arranged coaxially with the friction wheel (21), comprises a roller body (26) and an end cover (28) arranged at the end of the roller body (26) and rotating with the roller body (26); the roller body (26) is sleeved outside the roller sleeve (25), and a first step surface is formed on the inner surface of the roller body (26); The centrifugal member is a centrifugal throw block (23), which is installed between the roller sleeve (25) and the drum body (26), and a first end of the centrifugal throw block (23) is hinged to the roller sleeve (25), and a second step surface is formed on the second end of the centrifugal throw block (23); in the centrifugal state, the first step surface and the second step surface are limitedly matched, and in the reset state, the first step surface and the second step surface are separated; the second end of the centrifugal throw block (23) is connected to a tension spring (24), and 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; Both ends of the main shaft (22) are mounted on the end cover (28) and are suitable for rotating with the end cover (28).

5. The rope locking device according to claim 4, characterized in that: A buckling protrusion (261) is formed at the end of the drum body (26), and a buckling groove (281) that cooperates with the buckling protrusion (261) is formed on the end cover (28), so that the end cover (28) rotates with the drum body (26).

6. The rope locking device according to any one of claims 4 to 5, characterized in that: Also includes: A bearing (27), wherein the bearing (27) comprises a bearing inner ring, and the roller body (26) is mounted on the bearing inner ring.

7. The rope locking device according to any one of claims 1 to 5, characterized in that: A second compression spring (60) is installed between the first housing (40) and one of the friction wheels (21), and between the second housing (50) and the other friction wheel (21), and the second compression spring (60) is compressed to press the rope (100) toward the friction wheel (21).

8. The rope locking device according to any one of claims 1 to 5, characterized in that: The friction wheel (21) comprises a friction wheel plate and friction teeth (213) formed at the outer edge of the friction wheel plate, and the thickness of the friction teeth (213) gradually increases towards the center of the friction wheel plate.

9. The rope locking device according to any one of claims 1 to 5, characterized in that: The locking member (11) comprises a mounting portion sleeved on the main shaft (22) and a friction locking portion connected to the mounting portion.

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