CN111569299A

CN111569299A - Bidirectional falling-stopping pulley

Info

Publication number: CN111569299A
Application number: CN202010464306.8A
Authority: CN
Inventors: 刘建领
Original assignee: Zhengzhou Langma Outdoor Sporting Goods Co ltd
Current assignee: Zhengzhou Langma Outdoor Sporting Goods Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2020-08-25

Abstract

The invention relates to the technical field of pulleys, in particular to a bidirectional anti-drop pulley which comprises a shell and a roller arranged in the shell, the roller wheel is connected with the shell through a central shaft, positioning pieces are symmetrically arranged on two sides of the roller wheel, the two positioning pieces are connected through a connecting piece, and the two positioning pieces can rotate on the central shaft, one side of the positioning piece opposite to the roller is provided with a positioning groove, the outer side of the roller is provided with a locking component matched with the positioning groove, the locking component comprises two pawls arranged on the outer side of the roller, the two pawls are arranged on two sides of the central shaft, the fixed end of the pawl is connected with the roller through a pin shaft, the inner side of the movable end of the pawl is connected with a return spring, one end of the reset spring is fixedly connected with the roller, the purpose is to overcome the defects in the prior art, and the bidirectional falling-stopping pulley which is high in safety and capable of meeting bidirectional braking is provided.

Description

Bidirectional falling-stopping pulley

Technical Field

The invention relates to the technical field of pulleys, in particular to a bidirectional anti-drop pulley.

Background

The existing human body falling-proof protectors are of various types, different high-altitude operations are carried out, and the external environments, conditions and equipment for the operations are different, so that the falling-proof protection devices equipped for the human body falling-proof protectors are of different types, different types and different structures. The existing brake sliding can only brake in one direction when braking, and when the existing brake sliding slides in the other direction, accidents are easily caused due to no brake effect, and potential safety hazards are brought to users.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a bidirectional anti-drop pulley which is high in safety and can meet bidirectional braking.

The invention is realized by the following technical scheme: a bidirectional weight-stopping pulley comprises a shell and a roller arranged in the shell, wherein the roller is connected with the shell through a central shaft, positioning pieces are symmetrically arranged on two sides of the roller, the two positioning pieces are connected through a connecting piece and can rotate on the central shaft, a positioning groove is formed in one side, opposite to the roller, of each positioning piece, and a locking assembly matched with the positioning groove is arranged on the outer side of the roller;

the locking assembly comprises two pawls arranged on the outer side of the roller, the two pawls are arranged on two sides of the central shaft, the fixed ends of the pawls are connected with the roller through pin shafts, the inner sides of the movable ends of the pawls are connected with return springs, and one ends of the return springs are fixedly connected with the roller.

Furthermore, the connecting piece comprises a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is located at the top of the positioning piece, and the second connecting rod and the third connecting rod are located at the bottom of the positioning piece.

Furthermore, a first gear lever and a second gear lever are arranged in the shell, the first gear lever is located on one side close to the outer portion of the third connecting rod, and the second gear lever is located on one side close to the outer portion of the second connecting rod.

Further, a cover plate is installed on the shell, the shape of the cover plate is the same as that of the shell, and a groove for installing a central shaft is formed in the inner side of the cover plate.

Further, a hanging ring is arranged at the top of the shell.

Furthermore, one side of the pawl, which is close to the reset spring, is provided with a limiting rod, and the limiting rod is fixedly arranged on the roller.

The invention has the beneficial effects that: by arranging the pawl, the spring and the positioning piece, in the process of clockwise rotation of the roller driven by the rope, when the rotating speed of the roller is higher, the centrifugal force borne by the pawl is greater than the pulling force of the reset spring, the movable end of the pawl rotates clockwise until the pawl extends into the positioning groove, at the moment, the pawl drives the positioning piece to start rotating, the positioning piece drives the second connecting rod to move towards one side close to the second gear rod, at the moment, the conveying end of the rope can be fixed under the action of the second connecting rod and the second gear rod, when the rope is pressed, the positioning piece stops rotating simultaneously, so that the roller stops rotating, locking is completed, similarly, when the roller reversely rotates, the third connecting rod moves towards one side close to the first gear rod, the roller stops rotating while the rope is fixed, reverse locking is completed, in the process of normal rotation of the roller, the pawl is under the pulling force of the spring, the pawl and the positioning groove can be kept in a separation state, and the roller can be guaranteed to be normally used.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic partial cross-sectional view of the present invention;

FIG. 3 is a schematic view of a partial cross-sectional structure of the present invention in a front view;

FIG. 4 is a schematic structural view of a positioning member according to the present invention;

fig. 5 is a schematic structural view of the cover plate of the present invention.

Wherein: 1-shell, 2-positioning piece, 21-positioning groove, 3-roller, 4-first stop lever, 5-lifting ring, 6-pawl, 7-central shaft, 8-reset spring, 9-first connecting rod, 10-second stop lever, 11-second connecting rod, 12-third connecting rod, 13-limiting rod, 14-pin shaft, 15-cover plate and 16-groove.

Detailed Description

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.

Example 1

As shown in fig. 1-5, a bidirectional anti-drop pulley comprises a housing 1, a roller 3 installed in the housing 1, a cover plate 15 installed on the housing 1, the cover plate 15 connected with the housing 1 through screws, a hanging ring 5 installed on the top of the housing 1, the hanging ring 5 between the housing 1 and the cover plate 15, the hanging ring 5 capable of rotating 360 degrees along the horizontal direction, the cover plate 15 having the same shape as the housing 1, the roller 3 connected with the housing 1 through a central shaft 7, a groove 16 for installing the central shaft 7 formed on the inner side of the cover plate 15, positioning members 2 symmetrically installed on both sides of the roller 3, two positioning members 2 connected through a connecting member, and two positioning members 2 rotating around the central shaft 7, the connecting member comprising a first connecting rod 9, a second connecting rod 11 and a third connecting rod 12, the first connecting rod 9 located on the top of the positioning members 2, the second connecting rod 11 and, a first gear lever 4 and a second gear lever 10 are arranged in the shell 1, the first gear lever 4 is positioned at one side close to the outside of a third connecting rod 12, the second gear lever 10 is positioned at one side close to the outside of a second connecting rod 11, a positioning groove 21 is arranged at one side of the positioning piece 2 opposite to the roller 3, a locking assembly matched with the positioning groove 21 is arranged at the outer side of the roller 3, the locking assembly comprises two pawls 6 arranged at the outer side of the roller 3, the two pawls 6 are arranged at two sides of a central shaft 7, the fixed end of each pawl 6 is connected with the roller 3 through a pin shaft 14, a return spring 8 is connected at the inner side of the movable end of each pawl 6, the return spring 8 is arranged, when the roller 3 normally rotates, the pawls 6 and the positioning grooves 21 can be kept in a separation state, one end of the return spring 8 is fixedly connected with the roller 3, a limit rod 13 is arranged at one side of, the limiting rod 13 is arranged, so that the position of the pawl 6 can be limited, and the pawl 6 is prevented from being stuck.

When the pulley is used, the pull rope is arranged on the roller 3, one end of the pull rope is arranged between the second gear lever 10 and the second connecting rod 11, the other end of the pull rope is arranged between the first gear lever 4 and the third connecting rod 12, then the cover plate 15 is fixedly connected with the shell 1 through the screw, the assembly is completed, and under the normal working state of the pulley, the movable end of the pawl 6 is under the tension action of the reset spring 8, so that the pawl 6 is kept in a separation state from the positioning groove 21, meanwhile, the second gear lever 10 is kept at a certain distance from the second connecting rod 11, and the first gear lever 4 is also kept at a certain distance from the third connecting rod 12;

when the clockwise rotation speed of the roller 3 is too fast, the centrifugal force borne by the pawl 6 is larger than the pulling force of the reset spring 8, the movable end of the pawl 6 rotates outwards, the movable end of the pawl 6 on one side of the roller 3 can extend into the positioning groove 21 opposite to the movable end, at the moment, the pawl 6 can drive the positioning part 2 to start rotating, the positioning part 2 drives the second connecting rod 11 to move towards one side close to the second gear rod 10, at the moment, the conveying end of the rope can be fixed under the action of the second connecting rod 11 and the second gear rod 10, and when the rope is pressed tightly, the positioning part 2 stops rotating at the same time, so that the roller 3 stops rotating, and locking is completed;

when 3 anticlockwise rotations of gyro wheel and rotational speed are too fast, the centrifugal force that pawl 6 receives once more is greater than reset spring 8's pulling force, the expansion end of pawl 6 outwards rotates, 6 expansion ends of pawl on one side can extend to rather than relative constant head tank 21 on gyro wheel 3 this moment in the other side, pawl 6 can drive setting element 2 and begin to rotate this moment, setting element 2 drives third connecting rod 12 and removes to the one side that is close to first shelves pole 4, can fix the transport end of rope under the effect through third connecting rod 12 and first shelves pole 4 this moment, when compressing tightly the rope, setting element 2 stall simultaneously, thereby make 3 stall of gyro wheel, accomplish reverse locking.

Finally, it should be noted that: 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 modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a two-way cursory pulley that ends, includes the casing, sets up the gyro wheel in the casing, its characterized in that: the roller is connected with the shell through a central shaft, positioning pieces are symmetrically arranged on two sides of the roller, the two positioning pieces are connected through a connecting piece and can rotate on the central shaft, a positioning groove is formed in one side, opposite to the roller, of each positioning piece, and a locking assembly matched with the positioning groove is arranged on the outer side of the roller;

2. The bidirectional anti-drop pulley according to claim 1, wherein: the connecting piece comprises a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is located at the top of the positioning piece, and the second connecting rod and the third connecting rod are located at the bottom of the positioning piece.

3. The bidirectional anti-drop pulley according to claim 2, wherein: and a first gear lever and a second gear lever are arranged in the shell, the first gear lever is positioned at one side close to the outside of the third connecting rod, and the second gear lever is positioned at one side close to the outside of the second connecting rod.

4. The bidirectional anti-drop pulley according to claim 1, wherein: the shell is provided with a cover plate, the cover plate is the same as the shell in shape, and the inner side of the cover plate is provided with a groove for mounting a central shaft.

5. The bidirectional anti-drop pulley according to claim 1, wherein: and a hanging ring is arranged at the top of the shell.

6. The bidirectional anti-drop pulley according to claim 1, wherein: one side of the pawl, which is close to the reset spring, is provided with a limiting rod, and the limiting rod is fixedly arranged on the roller.