Following type self-locking device

Abstract

The following type self-locking device comprises a shell, a traction assembly, a clamping assembly and a bias assembly, the clamping assembly comprises a wheel set and a clamping jaw, when a user accidentally falls down, a rope drives the wheel set of the clamping assembly to rotate rapidly, and therefore the clamping jaw is driven to overcome the elastic force of an elastic piece to clamp the wheel set, and the clamping jaw is driven to move back and forth. The clamping of the rope by the wheel set is realized; the bias pressing assembly comprises a protruding contour, and when the wheel set clamps the rope, the protruding contour presses the rope in a bias mode, so that the bias pressing assembly presses the rope. According to the following type self-locking device, the rope is locked by the following type self-locking device under the dual effects of clamping force and friction force, and the following type self-locking device is prevented from losing efficacy.

Description

Technical Field

[0001] The present application relates to the field of aerial work, and in particular to a follower self-locking device. Background Art

[0002] The follower self-locking device is generally used in aerial work scenarios. The rope passes through the self-locking device, and the self-locking device is connected to the user. When the user falls accidentally, the self-locking device moves quickly along the rope, and the locking mechanism in the self-locking device is locked with the rope to stop the movement of the self-locking device and the rope. The prior art generally drives the claw to clamp the ratchet by the centrifugal force generated by the ratchet to achieve self-locking, or achieves self-locking by the friction force generated by the compression between the rope and the biasing block. However, the reliability of the above method needs to be improved, and the self-locking failure of the self-locking device often occurs, resulting in the inability to guarantee the safety of the user, and the product structure of the above self-locking method is complex. Utility Model Content

[0003] The present application provides a follow-up self-locking device.

[0004] Specifically, the present application is implemented through the following technical solutions:

[0005] The embodiment of the present application provides a follow-up self-locking device, which is used to prevent the user from accidentally falling during high-altitude operations, and is characterized in that the follow-up self-locking device includes:

[0006] A housing, used for threading ropes and cables;

[0007] A pulling assembly, arranged on the housing at one side of the rope, and used to connect with a user;

[0008] A clamping assembly, comprising a wheel set and a clamping claw, wherein the wheel set is rotatably arranged on the other side of the cable and pressed against the cable, and the clamping claw is pivotally arranged on the side of the wheel set through an elastic member, so that when a user falls accidentally, the cable drives the wheel set to rotate rapidly, thereby driving the clamping claw to overcome the elastic force of the elastic member to clamp the wheel set, thereby achieving clamping of the cable by the wheel set;

[0009] The biasing assembly is formed with a convex profile facing the cable, so that when the wheel assembly (31) clamps the cable, the convex profile is biased on the cable, so that the biasing assembly presses the cable.

[0010] In some embodiments, the shell includes a main body, a first transition portion and an extension portion, the main body covers one side of the follower self-locking device, the extension portion extends to the top area of ​​the other side of the follower self-locking device, and the first transition portion transitionally connects the main body and the extension portion between one side and the other side of the follower self-locking device.

[0011] In some embodiments, the pulling assembly includes a pulling ring and a connecting chain, the connecting chain is pivotally connected to the housing via a pin, and the pulling ring is freely sleeved on the connecting chain.

[0012] In some embodiments, the wheel set includes a ratchet and a hook wheel, the ratchet and the hook wheel are coaxially overlapped, and the hook wheel is used to compress the cable.

[0013] In some embodiments, the number of the ratchet is one, the number of the hook wheels is multiple, the wheel set also includes a circular wheel, the multiple hook wheels are overlapped at intervals through the circular wheel, and the ratchet wheels are symmetrically arranged between the hook wheels and the circular wheel.

[0014] In some embodiments, the elastic member is a coil spring, which is sleeved on the pivot axis of the claw. The claw includes a first claw portion, which is used to pivot when the claw overcomes the elastic force of the elastic member, so that the first claw portion clamps the ratchet.

[0015] In some embodiments, the clamping claw further includes a second claw portion, and the follower self-locking device further includes a stopper, and when the first claw portion clamps the ratchet, the second claw portion abuts against the stopper.

[0016] In some embodiments, the biasing assembly includes an inner lamination and outer laminations disposed on both sides of the inner lamination, the outer laminations and the inner laminations enclose a space between the outer laminations, and the wheel set is disposed in the space.

[0017] In some embodiments, the outer laminate forms the convex profile above the space in the direction of the cable.

[0018] In some embodiments, the housing further comprises a second transition portion distal from the first transition portion, and the biasing assembly is pivotally disposed on the second transition portion.

[0019] According to various embodiments of the utility model, when the user falls accidentally, the rope drives the wheel set to rotate rapidly, and the wheel set hits the claw. The centrifugal force drives the claw to overcome the elastic force and move. The moved claw can clamp the wheel set, thereby stopping the rotation of the wheel set, and then clamp the rope through the wheel set; because the rope is clamped by the wheel set, the user pulls the follower self-locking device to tilt through the pulling assembly, so that the raised contour of the biasing assembly is biased on the rope, and the generated friction force further ensures that the rope is locked, thereby avoiding failure of the follower self-locking device due to damage to the wheel set and the claw, and meeting the requirement of a simple structure of the follower self-locking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 is a schematic diagram of a follow-up self-locking device in an embodiment of the present disclosure from a first viewing angle;

[0022] Figure 2 is a schematic diagram of a second viewing angle of a follow-up self-locking device in an embodiment of the present disclosure;

[0023] Figure 3 is an exploded view of a biasing assembly in one embodiment of the present disclosure;

[0024] Figure 4 is a schematic diagram of an exploded view of a wheel set in an embodiment of the present disclosure;

[0025] Figure 5 is a schematic diagram of a release state of a follower-type self-locking device in an embodiment of the present disclosure;

[0026] Figure 6 It is a schematic diagram of the locking state of a follower-type self-locking device in an embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 01: rope; 11: main body; 12: first transition part; 13: extension part; 14: second transition part; 21: pulling ring; 22: connecting chain; 31: wheel set; 311: ratchet; 312: hook wheel; 313: round wheel; 32: claw; 41: inner lamination; 42: outer lamination; 421: raised profile. DETAILED DESCRIPTION

[0029] The present disclosure will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement the present disclosure, rather than implying any limitation on the scope of the present disclosure.

[0030] As used herein, the term "including" and its variations are to be interpreted as open-ended terms meaning "including but not limited to". The term "based on" is to be interpreted as "based at least in part on". The terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment". The term "another embodiment" is to be interpreted as "at least one other embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0031] In the following description, some specific numerical values ​​or numerical ranges may be involved. It should be understood that these numerical values ​​and numerical ranges are merely exemplary, which may be helpful in putting the idea of ​​the present disclosure into practice. However, the description of these examples is not intended to limit the scope of the present disclosure in any way. According to specific application scenarios and requirements, these numerical values ​​or numerical ranges can be set separately.

[0032] As mentioned above, the conventional follow-up self-locking device adopts a single self-locking method, which is easy to fail and thus the safety of the user cannot be guaranteed. The follow-up self-locking device proposed in the embodiment of the present disclosure at least partially solves the above problem. Figures 1 to 6 The structure and working principle of the follow-up self-locking device according to the exemplary embodiment of the present disclosure are described. Figure 1-4 In general, the follower-type self-locking device described herein includes a shell, a pulling assembly, a clamping assembly and a biasing assembly, wherein the shell is used to support other components of the self-locking device, the pulling assembly is used to connect the self-locking device to the user, the clamping assembly is used to apply a clamping force on the cable 01, and the biasing assembly is used to apply a friction force on the cable 01, so as to stop the movement between the cable 01 and the follower-type self-locking device by a dual locking method of clamping force and friction force.

[0033] case

[0034] The housing of the embodiment of the present disclosure is in an open state, so that the pulling assembly, the clamping assembly and the biasing assembly can be easily installed on the housing. At the same time, in order to ensure that the housing can provide sufficient strength, the housing of the embodiment of the present disclosure is designed in a surrounding form. Specifically, Figure 1 Looking down from above, the shell is "U" shaped. Figure 1 Looking upward from below, the shell is in an "L" shape. In fact, the shell as a whole is composed of a main body 11, an extension 13, a first transition part 12, and a second transition part 14. One side of the shell is completely covered by the main body 11, and the main body 11 constitutes the closed side of the shell. The first transition part 12 is used to transition the shell from one side to the other side. The second transition part 14 is arranged opposite to the first transition part 12, wherein the first transition part 12 extends continuously from top to bottom, so that the rope 01 can be blocked inside the first transition part 12; the second transition part 14 does not need to be arranged to extend continuously from top to bottom, which is conducive to simplifying the shell structure and reducing weight. An extension part 13 is formed on the other side of the shell, and the extension part 13 is used to block the rope 01 when the self-locking device is tilted, thereby preventing the rope 01 from escaping from the self-locking device.

[0035] Clamping components

[0036] The clamping assembly of the disclosed embodiment is composed of a wheel set 31, a claw 32 and a stopper. The wheel set 31 includes a ratchet 311, a plurality of hook wheels 312 and a plurality of round wheels 313, wherein the ratchet 311 is provided with a ratchet on its periphery for clamping with the claw 32; the hook wheel 312 is provided with a hook-shaped structure on its periphery for pressing and clamping the cable 01, so that it rotates with the movement of the cable 01 and keeps the cable 01 from moving when the wheel set 31 is stationary; the round wheel 313 does not need to be provided with a functional structure on its periphery, and is only used to act as a spacing between different hook wheels 312.

[0037] The ratchet wheel 311, hook wheel 312 and round wheel 313 of the disclosed embodiment can be arranged concentrically and connected as a whole by rivets, wherein the ratchet wheel 311 is arranged at the middle position of the axial direction, thereby improving the force balance of the wheel set 31. The wheel set 31 is connected between the inner laminations 41 of the biasing assembly through a pin shaft, so that the wheel set 31 can rotate as a whole between a pair of inner laminations 41.

[0038] The claw 32 of the disclosed embodiment has a first claw portion and a second claw portion. The claw 32 is pivotally connected between a pair of inner laminations 41 through a pin shaft. A coil spring is sleeved on the pin shaft. One end of the coil spring is clamped on the pin shaft, and the other end is pressed against the claw 32, so that the coil spring provides a circumferential elastic force for the claw 32. The first claw portion is used to clamp the pawl of the ratchet 311, and the second claw portion is used to be pushed by the pawl of the ratchet 311. In a normal state, under the elastic force of the coil spring, the second claw portion overlaps the pawl. When the ratchet 311 rotates rapidly, the thrust applied to the second claw portion increases. When the thrust overcomes the elastic force of the coil spring, the claw 32 is pushed to pivot, and the first claw portion abuts against the pawl of the ratchet 311, thereby locking the ratchet 311.

[0039] The stopper of the disclosed embodiment is arranged between a pair of outer stacked sheets 42 and wrapped around the outer periphery of the wheel assembly 31. When the claw 32 is pushed to pivot by the ratchet 311, the second claw is limited by the stopper when it moves a certain distance, thereby avoiding the first claw from striking the ratchet 311 and improving the service life of the ratchet 311.

[0040] Bias assembly

[0041] The biasing assembly of the disclosed embodiment is composed of a pair of outer laminations 42 and a plurality of inner laminations 41, wherein the plurality of inner laminations 41 are connected between the pair of outer laminations 42 by rivets. The pair of outer laminations 42 extend continuously to form a closed structure, and the inner laminations 41 have a smaller coverage area than the outer laminations 42, thereby forming a space together with the outer laminations 42 for accommodating the wheel set 31 and the stopper.

[0042] A pair of outer laminations 42 are formed with a raised profile 421 in a direction close to the cable 01 . The raised profile 421 is used to press against the cable 01 when the housing is tilted, thereby providing sufficient friction to the cable 01 .

[0043] The pulling assembly of the embodiment of the present disclosure is composed of a pulling ring 21 and a connecting chain 22. The pulling ring 21 is used to connect with the user, and the connecting chain 22 is pivotally or non-pivotally connected to the shell through a pin.

[0044] How it works

[0045] The working principle of the embodiment of the present disclosure is described below. Figure 5 As shown, the cable 01 is inserted into the housing and passes through the channel formed by the connecting chain 22 and the biasing assembly and the clamping assembly, so that under normal conditions, the cable 01 can be pressed into a bent state by the connecting chain 22 and the biasing assembly and the clamping assembly, ensuring that the cable 01 and the hook wheel 312 are pressed and fit tightly. Under normal working conditions, when the user slowly rises and falls, the self-locking device moves up and down slowly relative to the cable 01, the hook wheel 312 is driven to rotate by the cable 01, and the ratchet 311 rotates slowly synchronously without activating the first claw to work. Figure 6 As shown, when the user falls unexpectedly, the self-locking device moves up and down quickly relative to the cable 01, the hook wheel 312 is driven by the cable 01 to rotate quickly, the ratchet 311 pushes the claw 32 to overcome the elastic force of the coil spring and pivots greatly, and the first claw contacts the claw of the ratchet 311 to lock the ratchet 311. At this moment, the user applies a downward force to the housing through the pulling ring 21, and the entire housing rotates to an inclined posture with the contact point between the hook wheel 312 and the cable 01 as the center. In the inclined posture, since the extension direction of the cable 01 remains unchanged, the pulling force causes the raised contours 421 of the pair of outer laminates 42 to be biased against the surface of the cable 01. At this time, under the dual protection of friction and clamping force, the cable 01 is stably locked in a static state to avoid failure of the follow-up self-locking device.

[0046] The description of the embodiments herein and any reference to directions and orientations are only for the convenience of description and are not to be construed as any limitation on the scope of protection of the present invention. The following description of the preferred embodiments may involve combinations of features, which may exist independently or in combination, and the present invention is not particularly limited to the preferred embodiments. The scope of the present invention is defined by the claims.

[0047] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A follow-up self-locking device, used to prevent users from accidentally falling during high-altitude operations, characterized in that: The following self-locking device comprises: A housing for threading a rope (01); A pulling assembly, arranged on the housing at one side of the rope (01), the pulling assembly being used to connect with a user; A clamping assembly, comprising a wheel set (31) and a clamping claw (32), wherein the wheel set (31) is rotatably arranged on the other side of the rope (01) and pressed against the rope (01), and the clamping claw (32) is pivotally arranged on the side of the wheel set (31) through an elastic member, so that when a user accidentally falls, the rope (01) drives the wheel set (31) to rotate rapidly, thereby driving the clamping claw (32) to overcome the elastic force of the elastic member to clamp the wheel set (31), thereby achieving the clamping of the rope (01) by the wheel set (31); The biasing assembly is formed with a raised profile (421) facing the cable (01), so that when the wheel assembly (31) clamps the cable (01), the raised profile (421) is biased on the cable (01), thereby achieving the compression of the cable (01) by the biasing assembly.

2. The follower self-locking device according to claim 1, characterized in that: The shell comprises a main body (11), a first transition portion (12) and an extension portion (13), wherein the main body (11) covers one side of the follower-type self-locking device, the extension portion (13) extends in the top area of ​​the other side of the follower-type self-locking device, and the first transition portion (12) transitionally connects the main body and the extension portion between one side and the other side of the follower-type self-locking device.

3. The follower self-locking device according to claim 1, characterized in that: The pulling assembly comprises a pulling ring (21) and a connecting chain (22), wherein the connecting chain is pivotally connected to the housing via a pin, and the pulling ring is freely sleeved on the connecting chain.

4. The follower self-locking device according to claim 1, characterized in that: The wheel set comprises a ratchet wheel (311) and a hook wheel (312); the ratchet wheel (311) and the hook wheel (312) are coaxially overlapped, and the hook wheel (312) is used to press the rope (01).

5. The follower self-locking device according to claim 4, characterized in that: The number of the ratchet wheel (311) is one, the number of the hook wheels (312) is multiple, the wheel set further comprises a round wheel (313), the multiple hook wheels (312) are overlapped at intervals through the round wheel (313), and the ratchet wheel (311) is symmetrically arranged between the hook wheel (312) and the round wheel (313).

6. The follower self-locking device according to claim 4, characterized in that: The elastic member is a coil spring, which is sleeved on the pivot axis of the clamping claw (32). The clamping claw (32) includes a first claw portion, which is used to pivot when the clamping claw (32) overcomes the elastic force of the elastic member, so that the first claw portion clamps the ratchet (311).

7. The follower self-locking device according to claim 6, characterized in that: The clamping claw (32) further includes a second claw portion, and the follower-type self-locking device further includes a stopper (34). When the first claw portion clamps the ratchet (311), the second claw portion abuts against the stopper (34).

8. The follower self-locking device according to claim 1, characterized in that: The biasing assembly comprises an inner lamination (41) and outer laminations (42) arranged on both sides of the inner lamination (41); the outer laminations (42) and the inner laminations (41) enclose a space between the outer laminations (42); and the wheel set (31) is arranged in the space.

9. The follower self-locking device according to claim 8, characterized in that: The outer laminate (42) forms the convex profile (421) above the space in the direction of the cable (01).

10. The follower self-locking device according to claim 2, characterized in that: The housing further comprises a second transition portion (14) remote from the first transition portion (12), and the biasing assembly is pivotally disposed on the second transition portion (14).

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