CN115823149A - Self-locking device - Google Patents

Abstract

The invention discloses a self-locking device which comprises a main body unit, a cam unit, two locking block assemblies and two locking clamp spring assemblies, wherein the cam unit comprises a cam, a cam pin shaft, a return spring and a cam torsion spring; the cam pin shaft is connected with the cam and the main body unit key, and the cam is used for abutting against or separating from the guide rail; the two locking block assemblies can be close to or far away from the main body unit; the return spring is used for ejecting the cam pin shaft under the condition that the cam torsion spring has no pretightening force; under the condition that the pre-tightening force is applied to the cam torsion spring, the cam and the guide rail are in a separated state, and the angle of the cam is locked; the locking clamp spring assembly can push the locking block assembly to be far away from the main body unit along the horizontal direction and is used for unlocking the locking of the locking block assembly and the main body unit; the locking block assembly can push the locking clamp spring assembly to be close to the relative position of the main body unit in the horizontal direction. The invention solves the problems that the universality of the self-locking device is poor, the operator needs to prepare various self-locking devices, and different self-locking devices are selected according to different operation environments.

Description

Self-locking device

Technical Field

The invention belongs to the technical field of engineering construction tools, and particularly relates to a self-locking device.

Background

The self-locking device is a device capable of locking itself, and is commonly used for sliding and locking equipment on a vertical track. Vertical guide rails are arranged and installed in the ultra-high voltage transmission line engineering iron tower, and play a role in safety protection for personnel going up and down the tower; the engineering iron tower is provided with a cross arm along the horizontal direction, and the cross arm can be made of steel stranded wires or horizontal guide rails. During the overhaul operation of the ultra-high voltage transmission line engineering iron tower, operating personnel have various operation conditions, including climbing to a cross arm position in the middle of the iron tower from the bottom through a self-locking device along a vertical guide rail on the same tower position, and turning to the cross arm for operation; and moving to another tower position along the lead to perform operation, and then lowering the tower from the vertical guide rail after the operation is completed.

The existing common self-locking device can not be applied to all the operation conditions, and operators need to prepare various self-locking devices and select different self-locking devices according to different operation environments.

Therefore, research and development a self-locking device, can deal with multiple operation condition, can enough follow convenient dismantlement on the vertical guide rail, can realize along horizontal guide rail when removing to the vertical guide rail on simultaneously, the automatic re-setting of self-locking device improves the commonality of self-locking device, for the technical problem who awaits the solution urgently.

Disclosure of Invention

The invention aims to provide a self-locking device, which solves the problems that the prior self-locking device has poor universality and cannot be applied to all the operation conditions, an operator needs to prepare various self-locking devices and selects different self-locking devices according to different operation environments, and the like.

A self-locking device is used for being connected or locked on a guide rail in a sliding mode and comprises a main body unit, a cam unit, a locking block unit and a locking clamp spring unit, wherein a first through pin shaft hole and a through locking hole are formed in the main body unit, and a first key groove is formed in the first through pin shaft hole; the cam unit comprises a cam, a cam pin shaft, a return spring and a cam torsion spring; a second through pin shaft hole is formed in the cam, and a second key groove is formed in the second through pin shaft hole; a key extending along the axial direction of the cam pin shaft is formed at the first end of the cam pin shaft, and the cam is used for abutting against or separating from the guide rail; the cam pin shaft penetrates through the first through pin shaft hole and the second through pin shaft hole; two ends of the cam torsion spring are respectively connected with the cam and the main body unit, and the cam torsion spring is used for exerting pretightening force between the cam and the main body unit; the locking block unit comprises two locking block components which are connected to two sides of the main body unit in a sliding mode, and the two locking block components can be close to or far away from the main body unit; the locking clamp spring unit comprises two locking clamp spring assemblies which are connected in the through locking hole in a sliding mode, and the outer end portions of the locking clamp spring assemblies extend out of the through locking hole and then abut against the locking block assemblies; the reset spring is used for popping the first end of the cam pin shaft out of the first through pin shaft hole and the second through pin shaft hole under the condition that the cam torsion spring has no pretightening force; under the condition that pretightening force is applied to the cam torsion spring, the cam and the guide rail are in a separated state, and the key is connected in the first key groove and the second key groove; the locking clamp spring assembly can push the locking block assembly to be far away from the main body unit along the horizontal direction and is used for unlocking the locking of the locking block assembly and the main body unit; the locking clamp spring assembly can be pushed by the locking block assembly to be close to the main body unit along the horizontal direction, and the locking block assembly is used for locking the relative position of the locking block unit and the main body unit.

In some embodiments of the present application, the locking piece unit further includes a locking snap spring starting assembly, which can push two locking piece assemblies, unlock two locking assemblies from the position of the main body unit, and push two locking piece assemblies to move in a direction away from the main body unit.

In some embodiments of the present application, the main body unit is provided with a connection hole, and the connection hole is communicated with the through locking hole; the locking clamp spring assembly comprises a locking clamp spring sleeve and a locking clamp spring piece, and a first guide groove is formed in the position, close to the center of the main body unit, of the locking clamp spring sleeve along the length direction of the locking clamp spring sleeve; a locking part is formed at the end part of the locking clamp spring piece close to the center of the main body unit, a pushing part is formed at the end part of the locking clamp spring piece far away from the center of the main body unit, and the locking part is abutted against the inner wall of the connecting hole; the lower end part of the locking clamp spring starting assembly extends into the connecting hole to abut against the two locking clamp spring pieces; the locking clamp spring starting assembly can push the two locking clamp spring pieces to be unlocked from the connecting hole, the locking portion can move along the first guide groove, and the pushing portion pushes the two locking clamp spring pieces to be far away from the main body unit.

In some embodiments of the present application, the detent spring actuating assembly includes an actuating button and a return spring, and an annular stopper is formed in the middle of the actuating button; the reset spring is sleeved at the lower end of the starting button, the upper end of the reset spring is abutted to the annular stop, and the lower end of the reset spring is abutted to the lower end of the connecting hole.

In some embodiments of the present application, an annular blocking ring is formed on an inner wall of the connection hole, the connection hole penetrates through the annular blocking ring to communicate with the through locking hole, and a second guide groove is formed on the annular blocking ring at a position corresponding to the first guide groove; the locking clamp spring piece sequentially penetrates through the first guide groove and the second guide groove to be abutted to the inner wall of the connecting hole.

In some embodiments of the present application, the locking piece assembly includes a locking piece and a plurality of locking piece springs, the locking piece springs are connected between two sides of the main unit and two locking pieces, and the locking piece springs are used for pushing the locking pieces to be away from the main unit.

In some embodiments of the present application, the first end of the cam pin is formed with a first annular stop; the return spring is sleeved outside the first end of the cam pin shaft, one end of the return spring is connected with the first annular stop, and the other end of the return spring is connected with the main body unit; the cam torsion spring is sleeved outside the second end of the cam pin shaft; one end of the cam torsion spring is connected with the main body unit, and the other end of the cam torsion spring is connected with the cam.

In some embodiments of the present application, a third guide groove is formed on one side of the locking block, which is close to the main body unit, along a length direction of the locking block, and a first stopper is formed on one side of the third guide groove, which is close to the main body unit; first guide rails are arranged on two sides of the main body unit along the length direction of the main body unit, and a second stop is formed on one side, far away from the main body unit, of each first guide rail; the first guide rail is arranged in the third guide groove; the locking block moves away from the main body unit, and the first stop and the second stop abut against each other to limit the positions of the locking block and the main body unit.

In some embodiments of the present application, a sliding groove is formed along a length direction of one side of the locking block, which is close to the main body unit; the chute is movable along the guide rail.

In some embodiments of the present application, a first guide wheel and a second guide wheel are rotatably connected to an inner side surface of the chute; a limiting part is formed on the first guide wheel and is used for contacting with the inner surface of the guide rail; and a third guide wheel is rotatably connected to the main body unit and is in rolling contact with the outer surface of the guide rail.

Compared with the prior art, the invention has the advantages and positive effects that:

1. the two locking clamp spring assemblies are arranged to push the two locking block assemblies to be far away from the main body unit to be close to the main body unit, so that the self-locking device can be conveniently detached from the guide rail; through promoting two locking piece subassemblies and being close to the position locking of main part unit back locking jump ring subassembly realization and main part unit, realize installing on the guide rail that self-locking ware is convenient. Therefore, in the process that an operator switches from one vertical guide rail to another vertical guide rail for operation, or under the other conditions that the self-locking device needs to be taken down from the guide rail and reinstalled, the operation can be carried out conveniently and quickly in a time-saving and labor-saving manner, and meanwhile, the operation risk of the operator is reduced;

2. the cam, the main body unit and the cam pin shaft are connected through keys, a cam torsion spring is arranged between the cam and the main body unit, a return spring is arranged between the cam pin shaft and the main body unit, the return spring ejects the cam pin shaft under the condition that the cam torsion spring has no pretightening force, the angle locking of the cam is released, and the cam can rotate to lock the self-locking device on the guide rail when an operator moves along the vertical guide rail; under the condition that the pretightening force is applied to the cam torsion spring, the stable connection of the cam pin shaft, the cam and the main body unit can be ensured, the angle locking of the cam is realized at a position which is not contacted with the guide rail, and the cam torsion spring can smoothly move in the process that an operator moves along the horizontal guide rail;

3. due to the characteristics, the self-locking device can deal with various operation conditions, can be conveniently detached from the vertical guide rail, and can automatically reset when moving to the vertical guide rail along the horizontal guide rail, so that the universality of the self-locking device is improved.

Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of an overall structure of an embodiment of a self-locking device according to the present invention;

FIG. 2 is a top view of one embodiment of a self-lock provided in the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken at A-A of FIG. 2;

FIG. 4 is a cross-sectional view taken at B-B of FIG. 2;

FIG. 5 is a cross-sectional view at C-C of FIG. 2;

FIG. 6 is a side view of one embodiment of a self-lock provided in accordance with the present invention;

FIG. 7 is a front view of one embodiment of a self-lock provided in the present invention;

FIG. 8 is a schematic view showing the entire structure of a main body unit of an embodiment of a self-locker according to the present invention;

FIG. 9 is a schematic view of the overall construction of the cam of an embodiment of a self-locking device according to the present invention;

FIG. 10 is a schematic view of the overall construction of the cam pin of an embodiment of the self-locking device of the present invention;

in the figure, the position of the upper end of the main shaft,

100, a main body unit;

110, through the locking hole;

120, connecting holes;

121, an annular baffle ring;

1211, a second guide groove;

130, a first guide rail;

131, a second stop;

140, a latch block spring first connection aperture;

150, a third guide wheel;

160, a first through pin shaft hole;

161, a first keyway;

200, a cam unit;

210, a cam;

211, a second through pin hole;

212, a second keyway;

213, a working hole;

220, a cam pin;

221, a key;

222, a second annular stop;

223, a first annular stop;

230, a return spring;

240, a cam torsion spring;

300, a locking block unit;

310, a lock block assembly;

311, a locking block;

3111, a third channel;

3112, a first stop;

3113, a chute;

3114, a first guide wheel;

3115, a second guide wheel;

3116, a stopper;

312, a latch block spring;

400, locking the clamp spring unit;

410, locking the clamp spring assembly;

411, locking the clamp spring sleeve;

4111, a first guide groove;

412, locking the clamp spring piece;

420, locking the clamp spring starting assembly;

4121, a locking portion;

4122, a pushing portion;

421, start button;

4211, annular stop;

422, a return spring.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present application.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection; may be mechanically coupled, may be directly coupled, or may be indirectly coupled through an intermediary. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

The self-locking device is a device capable of locking itself, and is commonly used for sliding and locking equipment on a vertical track. Vertical guide rails are arranged and installed in the ultra-high voltage transmission line engineering iron tower, and play a role in safety protection for personnel going up and down the tower; the engineering iron tower is provided with a cross arm along the horizontal direction, and the cross arm can be made of steel stranded wires or horizontal guide rails. During the maintenance operation of the extra-high voltage transmission line engineering iron tower, operating personnel have various operation conditions, including climbing to a cross arm position in the middle of the iron tower from the bottom of the same tower position through a self-locking device along a vertical guide rail, and turning to the cross arm for operation; and moving to another tower position along the lead to perform operation, and then lowering the tower from the vertical guide rail after the operation is completed.

At present, a common self-locking device cannot be applied to all the operation conditions, an operator needs to prepare various self-locking devices, different self-locking devices are selected according to different operation environments, and meanwhile, quick response cannot be carried out on temporary emergency tasks.

In this embodiment, relate to a self-locking ware, can deal with multiple operation condition, can enough follow convenient dismantlement on the vertical guide rail, when can realizing moving to the vertical guide rail along horizontal guide rail simultaneously, the self-locking ware's automatic re-setting improves the commonality from the self-locking ware.

In the present embodiment, as shown in fig. 1, 2, 3, 4, 5, 6, and 7, the self-locker includes a body unit 100, a cam unit 200, a lock block unit 300, and a locking clip unit 400.

In order to allow the self-locker to be easily detached from the guide rail and to be easily remounted on another guide rail, the locking piece unit 300 is designed to include two locking piece assemblies 310, and the two locking piece assemblies 310 are slidably coupled to both sides of the main unit 100.

The latch clamp spring unit 400 is designed to include two latch clamp spring assemblies 410, and the two latch clamp spring assemblies 410 can be respectively located at the lock block assemblies 310 on the two sides and are far away from the main unit 100, so that the position locking between the two latch clamp spring assemblies 410 and the main unit 100 is released.

The two locking block assemblies 310 are respectively pushed towards the main body unit 100, so that the two locking clamp spring assemblies 410 can be pushed to move close to the main body unit 100 until the two locking clamp spring assemblies 410 are locked with the main body unit 100.

In the present embodiment, a through locking hole 110 is formed in the main unit 100 along the horizontal direction, and the through locking hole 110 is used for installing two locking clip spring assemblies 410. Two locking snap spring assemblies 410 are slidably connected in the through locking hole 110.

In this embodiment, the lock hole unit 300 further includes a lock-clamp spring actuating assembly 420. The locking clip spring actuating assembly 420 pushes the two locking piece assemblies 310 to release the position locking with the main unit 100 and moves the two locking hole assemblies 310 away from the main unit 100.

In order to mount the latch spring actuating assembly 420, a coupling hole 120 is formed in the body unit 100.

The connection hole 120 communicates with the through locking hole 110.

The latch-clamp spring actuating assembly 420 pushes the two latch-clamp spring assemblies 410 slidably coupled in the through-locking holes 110 through the coupling holes 120.

In the present embodiment, the catch spring assembly 410 includes a catch spring sleeve 411 and a catch spring plate 412.

Two locking snap spring sleeves 411 are respectively installed in the through locking hole 110 from two ends of the through locking hole 110.

The end of the locking clip sleeve 411 remote from the main unit 100 is connected to the adjacent locking piece assembly 310 by bolts.

A first guide groove 4111 extends from a position close to the center of the main body unit 100 on the locking clamp spring sleeve 411 along the length direction of the locking clamp spring sleeve 411.

The end of the catch spring plate 412 near the center of the body unit 100 is formed with a lock portion 4121, and the end away from the center of the body unit 100 is formed with a push portion 4122.

The two locking portions 4121 are located at the communication of the connecting hole 120 and the through-locking hole 110.

An annular retaining ring 121 is formed on the inner wall of the connecting hole 120, and the connecting hole 120 passes through the annular retaining ring 121 and then communicates with the through locking hole 110.

A second guide groove 1211 is formed on the annular retainer 121 at a position corresponding to the two first guide grooves 4111.

After the locking portion 4121 passes through the first guide groove 4111 and extends out of the locking clip sleeve 411, and then passes through the second guide groove 1211, the locking portion 4121 abuts against the inner wall of the connecting hole 120, so that the locking clip spring plate 412 is locked with the main unit 100.

In this embodiment, the locking clip spring actuating assembly 420 includes an actuating button 421 and a return spring 422.

An annular stop 4211 is formed in the middle of the activation button 421. The lower end of the self-starting button 421 of the return spring 422 is sleeved outside the starting button 421, and the upper end of the return spring 422 is abutted against the annular stop 4211. The lower end of the return spring 422 is connected with the annular retaining ring 121.

The lower end of the activation button 421 protrudes from the ring stopper 4211 into the through locking hole 110. When the operator presses the start button 421, the lower end of the start button 421 abuts against the two lock portions 4121 to push the lock portions 4121 to unlock the body unit 100.

After the unlocking, the two locking clip spring pieces 412 move to both sides, and the pushing portions 4122 on both sides push the lock piece assemblies 310 on both sides, respectively. The two locking piece assemblies 310 move away from the center of the body unit 100.

In order to enable the locking piece assembly 310 to be ejected with respect to both sides of the main unit 100, the locking piece assembly 310 includes a locking piece 311 and a plurality of locking piece springs 312.

The lock block spring 312 is installed between the lock block 311 and the main body unit 100, and when the lock block 311 is away from the center of the main body unit 100 with respect to the main body unit 100, the lock block spring 312 urges the ejection of the lock block 311.

Specifically, the plurality of lock block springs 312 are provided at intervals in the longitudinal direction of the main body unit 100.

In the present embodiment, in order to implement the installation of the block spring 312, the first block spring coupling holes 140 are spaced apart on both sides of the main body unit 100.

The locking block spring 312 is installed in the first locking block spring connecting hole 140, and both ends of the locking block spring 312 are connected with the first locking block spring connecting hole 140 and the locking block 311 respectively.

In this embodiment, in order to realize the sliding connection between the locking block 311 and the main unit 100, a third guide groove 3111 is formed at a side of the locking block 311 close to the main unit 100 along the length direction thereof, and a first stopper 3112 is disposed at a side of the third guide groove 3111 close to the center of the main unit 100. The two sides of the main unit 100 are provided with first guide rails 130 extending along the length direction thereof, and one side of the first guide rails 130 far away from the main unit 100 is extended to form second stoppers 131.

The first guide rail 130 is installed in the third guide groove 3111, and the second stopper 131 is located in the third guide groove 3111. The first stopper 3112 can prevent the second stopper 131 from sliding out of the third guide groove 3111, thereby functioning as a relative position between the locking piece 311 and the main unit 100.

Specifically, the first latch spring coupling hole 140 is opened in the third guide groove 3111.

A latch block spring first coupling hole 140 is opened on the first rail 130.

To connect the lock block 311 to the guide rail, a slide groove 3113 is formed on the lock block 311 on a side close to the main unit 100.

The sliding grooves 3113 formed in the two locking blocks 311 can move along the guide rails.

To reduce the friction between the two locking blocks 311 and the sliding groove 3113, a first guide wheel 3114 and a second guide wheel 3115 are rotatably connected to the side of the sliding groove 3113.

The first guide wheel 3114 and the second guide wheel 3115 are rotatable along the guide rail.

The first guide wheel 3114 is formed with a stopper 3116, and the stopper 3116 is in contact with an inner side surface of the guide rail.

A third guide wheel 150 is rotatably coupled to a surface of the main unit 100 adjacent to the guide rail, and the third guide wheel 150 is in rolling contact with an outer side surface of the guide rail.

In order to ensure that the operator can move smoothly in the process of moving along the horizontal guide rail and the self-locking device can realize the automatic recovery locking function after moving to the vertical guide rail through the steering device,

as shown in fig. 8 and 10, the main body unit 100 is provided with a first through-pin hole 160, and the first through-pin hole 160 is provided with a first key groove 161.

The first key groove 161 extends in the axial direction of the first through-pin hole 160.

The cam unit 200 includes a cam 210, a cam pin 220, a return spring 230, and a cam torsion spring 240.

As shown in fig. 9, the cam 210 has a second through-pin hole 211, and the second through-pin hole 211 has a second key groove 212.

The second key groove 212 extends in the axial direction of the second through-pin shaft hole 211.

A key 221 extending in the axial direction of the cam pin 220 is formed on the first end of the cam pin 220.

The cam pin 220 passes through the first through pin hole 160 and the second through pin hole 211.

The cam 210 is rotated relative to the main unit 100, so that the cam 210 is pressed against or separated from the guide rail, and the self-locking device is locked and unlocked with the rail.

Both ends of the cam torsion spring 240 are connected to the cam pin 220 and the main unit 200, respectively.

The cam torsion spring 240 may be pre-tensioned between the cam pin 220 and the main unit 100.

The cam torsion spring 240 may also be connected between the cam pin 220 and the main unit 100 without pre-tightening force.

A first end of the cam pin 220 is formed with a first annular stop 223.

A second end of the cam pin 220 is formed with a second annular stop 222.

A return spring 230 is sleeved over a first end of the cam pin 220. One end of the return spring 230 is connected to the first annular stopper 223, and the other end of the return spring 230 is connected to the main unit 100.

The cam torsion spring 240 is sleeved over the second end of the cam pin 220. One end of the cam torsion spring 240 is connected to the cam 210, and the other end of the cam torsion spring 240 is connected to the main unit 100.

When the cam torsion spring 240 is in a non-pretightening state, the return spring 230 pushes the cam pin 220 to pop out from the first through pin hole 160 and the second through pin hole 211.

Under the condition that the cam torsion spring 240 is under the applied pretightening force, the key 221 is connected in the first key slot 161 and the second key slot 212. At this time, the cam 210 is not in contact with the guide rail.

Due to the biasing force of the cam torsion spring 240, the cam 210 can apply a force to the body unit 200 through the cam pin 220. The key 221 abuts against the first key groove 161 and the second key groove 212, and prevents the cam pin 220 from being pushed out of the first through pin hole 160 and the second through pin hole 211 by the return spring 230.

During the operation of the operator along the horizontal guide rail, the cam pin 220 is pushed into the first through pin hole 160 and the second through pin hole 211, so that the key 221 is connected into the first key groove 161 and the second key groove 212, in this state, the cam 210 is not in contact with the guide rail, the cam torsion spring 240 is in a pre-tightening state, and the angle of the cam 210 relative to the main unit 100 is locked.

Because the operator is connected with the operation hole 213 formed in the cam 210 through the safety rope, when the operator moves along the horizontal guide rail, the operator applies force on the cam 210 through the safety rope, if the safety rope lifts the cam 210 relative to the main unit 100, the pretightening force of the cam torsion spring 240 is released, the cam torsion spring 240 is in a state without pretightening force, at this time, the cam pin shaft 220 pops out from the first through pin shaft hole 160 and the second through pin shaft hole 211, the position locking of the cam 210 is disabled, at this time, if the operator continues to move along the direction of lifting the cam 210, at this time, the cam 210 is in a non-locking state relative to the guide rail, and the operator can move freely and smoothly. At this time, since the operator moves in the direction of pressing the cam 210 against the main unit 100, the cam 210 is locked to the guide rail, and at this time, the cam pin 220 needs to be pushed into the first and second through pin holes 160 and 211 again, so that the key 221 is connected to the first and second key grooves 161 and 212, the cam torsion spring 240 obtains a pretension force again, the position of the cam 210 is locked, and the cam 210 is separated from the guide rail. Therefore, in the process that the operator continuously moves in the direction of pressing the cam 210, the cam 210 and the guide rail are kept in an unlocked state, and smooth movement of the operator is guaranteed. Therefore, no matter the operator moves along the horizontal guide rail in any direction, the operator can move smoothly under the action of the forces in different directions exerted on the cam 210 by the safety rope.

When an operator turns to the vertical guide rail from the horizontal guide rail through the steering gear, the operator is connected to the operation hole 213 of the cam 210 through the safety rope, and the self-locking device moves downward along the vertical direction relative to the operator due to the action of gravity, so that the safety rope lifts the cam 210 through the operation hole 213, the pre-tightening force of the cam torsion spring 240 disappears, and the return spring 230 can push the first end of the cam pin shaft 220 to pop out from the first through pin shaft hole 160 and the second through pin shaft hole 211. Thereby, the key 221 is ejected from the first key groove 161 and the second key groove 212, and the locked connection between the key 221 and the first key groove 161 and the second key groove 212 is released. Thereby enabling the cam 210 to rotate with respect to the body unit 100. In this state, when the locker is coupled to the vertical guide rail, the cam 210 restores the locking function due to the gravity. Therefore, when the worker turns the vertical rail from the horizontal rail by the steering gear, the locking function of the self-locking device is restored.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (10)

1. A self-locking device for sliding connection or locking on a rail, comprising:

the main body unit is provided with a first through pin shaft hole and a through locking hole, and a first key groove is formed in the first through pin shaft hole;

the cam unit comprises a cam, a cam pin shaft, a return spring and a cam torsion spring; a second through pin shaft hole is formed in the cam, and a second key groove is formed in the second through pin shaft hole; a key extending along the axial direction of the cam pin shaft is formed at the first end of the cam pin shaft, and the cam is used for abutting against or separating from the guide rail; the cam pin shaft penetrates through the first through pin shaft hole and the second through pin shaft hole; two ends of the cam torsion spring are respectively connected with the cam and the main body unit, and the cam torsion spring is used for exerting pretightening force between the cam and the main body unit;

the locking block unit comprises two locking block assemblies which are connected to two sides of the main body unit in a sliding mode, and the two locking block assemblies can be close to or far away from the main body unit;

the locking clamp spring unit comprises two locking clamp spring assemblies which are connected in the through locking hole in a sliding mode, and the outer end portions of the locking clamp spring assemblies extend out of the through locking hole and then abut against the locking block assemblies;

the reset spring is used for popping the first end of the cam pin shaft out of the first through pin shaft hole and the second through pin shaft hole under the condition that the cam torsion spring has no pretightening force; under the condition that pretightening force is applied to the cam torsion spring, the cam and the guide rail are in a separated state, and the key is connected in the first key groove and the second key groove; the locking clamp spring assembly can push the locking block assembly to be far away from the main body unit along the horizontal direction and is used for unlocking the locking of the locking block assembly and the main body unit; the locking clamp spring assembly can be pushed by the locking block assembly to be close to the main body unit along the horizontal direction, and the locking block assembly is used for locking the relative position of the locking block unit and the main body unit.

2. The self-locker of claim 1 wherein said locking block unit further comprises a locking circlip actuating assembly which urges both of said locking block assemblies to unlock both of said locking assemblies from said body unit and urges both of said locking block assemblies to move in a direction away from said body unit.

3. The self-locking device according to claim 2, wherein the main body unit is provided with a connecting hole, and the connecting hole is communicated with the through locking hole;

the locking jump ring subassembly includes:

the locking clamp spring sleeve is provided with a first guide groove close to the center of the main body unit along the length direction of the locking clamp spring sleeve;

a locking clip spring piece, wherein a locking part is formed at the end part of the locking clip spring piece close to the center of the main body unit, a pushing part is formed at the end part of the locking clip spring piece far away from the center of the main body unit, and the locking part is abutted against the inner wall of the connecting hole;

the lower end part of the locking clamp spring starting assembly extends into the connecting hole to abut against the two locking clamp spring pieces;

the locking clamp spring starting assembly can push the two locking clamp spring pieces to be unlocked from the connecting hole, the locking portion can move along the first guide groove, and the pushing portion pushes the two locking clamp spring pieces to be far away from the main body unit.

4. The autolocker of claim 3, wherein said detent spring actuating assembly comprises:

a start button, wherein an annular stop is formed at the middle part of the start button;

the reset spring is sleeved at the lower end of the starting button, the upper end of the reset spring abuts against the annular stop, and the lower end of the reset spring abuts against the lower end of the connecting hole.

5. The self-locking device according to claim 4, wherein an annular blocking ring is formed on the inner wall of the connecting hole, the connecting hole penetrates through the annular blocking ring and is communicated with the through locking hole, and a second guide groove is formed in the annular blocking ring at a position corresponding to the first guide groove;

the locking clamp spring piece sequentially penetrates through the first guide groove and the second guide groove to be abutted to the inner wall of the connecting hole.

6. The autolocker of claim 1, wherein said lock block assembly comprises a lock block and a plurality of lock block springs;

the locking piece spring is connected the both sides of main part unit and two between the locking piece, the locking piece spring is used for promoting the locking piece is kept away from the main part unit.

7. The self-locker of claim 1,

a first annular stop is formed at the first end of the cam pin shaft; the return spring is sleeved outside the first end of the cam pin shaft, one end of the return spring is connected with the first annular stop, and the other end of the return spring is connected with the main body unit; the cam torsion spring is sleeved outside the second end of the cam pin shaft; one end of the cam torsion spring is connected with the main body unit, and the other end of the cam torsion spring is connected with the cam.

8. The self-locking device of claim 6, wherein a third guide groove is formed on one side of the locking block close to the main body unit along the length direction of the locking block, and a first stop is formed on one side of the third guide groove close to the main body unit;

first guide rails are arranged on two sides of the main body unit along the length direction of the main body unit, and a second stop is formed on one side, far away from the main body unit, of each first guide rail;

the first guide rail is arranged in the third guide groove;

the locking block moves away from the main body unit, and the first stop and the second stop abut against each other to limit the positions of the locking block and the main body unit.

9. The self-locker of claim 6,

one side of the locking block, which is close to the main body unit, is provided with a sliding groove along the length direction;

the chute is movable along the guide rail.

10. The self-locking device according to claim 9, wherein a first guide wheel and a second guide wheel are rotatably connected to an inner side surface of the slide groove; a limiting part is formed on the first guide wheel and is used for contacting with the inner surface of the guide rail;

and a third guide wheel is rotatably connected to the main body unit and is in rolling contact with the outer surface of the guide rail.

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