CN110917514A

CN110917514A - Automatic slow descending device

Info

Publication number: CN110917514A
Application number: CN201911232655.0A
Authority: CN
Inventors: 李国栋
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-11-23
Filing date: 2019-11-23
Publication date: 2020-03-27
Anticipated expiration: 2039-11-23
Also published as: CN110917514B

Abstract

The invention discloses an automatic slow descending device, which is suitable for the fields of fire escape, high-altitude operation protection, physical training and the like. One end of the slow descending rope is connected with a person or object needing slow descending, the other end of the slow descending rope is connected with the counterweight, when the person or object descends, the rotating wheel and the damping body are driven to rotate, the damping body generates reverse torque on the rotating wheel in the inner circle of the machine body, particularly under the action of the wedge-shaped groove in the inner circle of the machine body, the reverse torque is increased along with the increase of the descending speed of the person or object, when the reverse torque is equal to the torque generated by the dead weight of the person or object, the descending speed is not increased any more, and the uniform slow descending of the person or object. When people or objects are static and move upwards, the weight parts can keep the slow descending rope in a tensioning state, so that the people or the objects needing slow descending are always protected by the slow descending device.

Description

Automatic slow descending device

Technical Field

The invention relates to a mechanical device, in particular to a device which can immediately protect people or objects from automatically and slowly descending when the people or the objects move or stand still in the air, and is suitable for the fields of fire escape, high-altitude operation protection, rock climbing, physical training and the like

Background

In production and life, people are required to actively and slowly descend from a high place to escape when working at the high place in the air or encountering disasters such as fire in a high-rise building. Especially, during high-altitude (aerial) operation, such as building installation, rock climbing movement, physical training and the like, the position of a worker needs to be moved, and in order to prevent the worker from falling or actively make the worker slowly fall, the worker on the ground needs to use a relatively complex mechanism for protection. The safety is poor and the labor cost is high due to the protection mode.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: aiming at the defects of the prior art, the automatic slow descending device is provided.

The technical scheme adopted by the invention is as follows: the automatic slow descending device comprises a machine body, a rotating wheel, a damping body, a central shaft, an end cover, a counterweight and a slow descending rope assembly. The slow descending rope is arranged in a rope groove of the rotating wheel, one end of the slow descending rope is connected with a person or an object needing slow descending, and the other end of the slow descending rope is connected with the counterweight; a plurality of grooves are uniformly formed in the circumference of one end of the rotating wheel, and damping bodies are arranged in the grooves and can slide in the grooves; the end cover comprises a front end cover and a rear end cover which are respectively arranged on the front end surface and the rear end surface of the machine body; the central shaft is arranged in the rotating wheel, the rotating wheel is arranged in a circular hole of the machine body, and the rotating wheel can rotate around the central shaft; a plurality of wedge-shaped grooves are uniformly arranged on the circumference of the round hole of the machine body along the circumferential direction. Therefore, when a slowly descending person or object descends, the self weight drives the slowly descending rope, the slowly descending rope drives the rotating wheel to rotate, the rotating wheel drives the damping body to do circular motion by taking the axis of the rotating wheel as the center of a circle, the damping body generates centrifugal force, the circular hole of the machine body generates reaction force on the damping body, the reaction force is perpendicular to the motion direction of the damping body, no work is done on the motion of the damping body, and the friction force F generated by the reaction force does work on the damping body to form reverse torque on the rotating wheel; when the damping body rotates to the wedge-shaped groove of the circular hole of the machine body, the wedge-shaped groove generates a reaction force on the damping body, and an included angle between the direction of the reaction force N and the reverse direction of the movement of the damping body is smaller than 90 degrees to do work on the movement of the damping body, so that a reverse torque on the rotating wheel is formed. The reaction force N generates a counter torque that is greater than the friction force F and increases as the rotational speed of the damping body increases. The descending speed of the slowly descending person or object is increased, the reverse torque is simultaneously increased, and when the reverse torque is equal to the torque generated by the slowly descending person or object, the descending speed of the slowly descending person or object is not increased any more, so that the slowly descending is realized at the same speed.

The damping body is a stepped shaft with a small middle and large two ends, the diameters of the large ends at the two ends are equal, the middle part of the damping body is arranged in the groove of the rotating wheel, the groove axially positions the damping body, and the damping body can be increased in size and large middle at the two ends due to the limitation of the width of the groove on the size of the middle part of the damping body, so that the damping effect is increased.

The bottom of the big end of the wedge-shaped groove of the circular hole of the machine body is an arc surface, the radius of the arc is larger than that of the big end of the damping body, and the bottom of the small end of the groove is a plane tangent to the arc surface of the groove. When the damping body rotates from one end of the small end of the wedge-shaped groove to one end of the big end. The reverse torque generated by the reaction force N of the big head of the wedge-shaped groove to the damping body is larger than the reverse torque generated when the damping body rotates from one end of the big head of the wedge-shaped groove to one end of the small head of the wedge-shaped groove. One end of a descent control rope which generates large reverse torque is connected with a person or an object needing descent control; one end of the slow descending rope which generates small reverse torque is connected with a weight piece which is in a suspended state. Therefore, the slow descending rope connected with one end of the person or the object is always in a tensioned state and comprises the upward displacement, and the person or the object needing slow descending is ensured to be always in slow descending protection.

One end of the arc surface of the big end of the wedge-shaped groove of the machine body round hole is provided with a radial through hole at the position corresponding to the middle shaft of the damping body. When the automatic slow descending device works, the through holes form air flow, the air flow pushes the damping body to increase the centrifugal force of the damping body, the damping effect of the damping body is increased, and meanwhile, the air flow dissipates heat to the automatic slow descending device.

The machine bodies can be integrated and made of the same material.

The round hole of above-mentioned organism adopts elasticity big, and is wear-resisting, resistant impact different if engine body shell's material like nylon etc. elasticity is big wear-resisting, and elastic deformation volume is big after the material atress of resistant impact, has increased damping effect to can reduce the throat sound of slowly falling device during operation moreover.

The machine body is provided with a lifting ring

The slow descending rope assembly comprises a guide wheel and a guide wheel shaft, wherein the guide wheel is arranged on the guide wheel shaft, the guide wheel can rotate on the guide wheel shaft, the slow descending rope is clamped between the rotating wheel and the guide wheel and between the guide wheel and the guide wheel, and the guide wheel shaft is connected with the front end cover.

The central shaft is connected with the front end cover and the rear end cover through nuts.

Drawings

FIG. 1 is a structural diagram of an embodiment of the present invention.

FIG. 2 is another structural diagram according to an embodiment of the present invention.

FIG. 3 is a structural diagram of the damping body of the present invention.

FIG. 4 is a diagram of a second structure according to an embodiment of the present invention.

Detailed Description

The first embodiment is as follows:

referring to the attached

drawings

1, 2 and 3, the automatic slow descending device comprises a machine body 1, a rotating wheel 2, a damping body 3, a central shaft 4, an end cover 5, a counterweight 6 and a slow descending rope assembly. The slow descending rope 71 is disposed in the rope groove 21 of the rotating wheel 2, one end of the slow descending rope 71 is connected to a person or object to be slowly descended, and the other end is connected to the counterweight 6. A plurality of grooves 22 are formed in the circumference of one end of the rotating wheel 2, the damping bodies 3 are arranged in the grooves 22, and the damping bodies 3 can slide in the grooves 22. The end cover 5 comprises a front end cover 51 and a rear end cover 52 which are respectively arranged on the front end surface and the rear end surface of the machine body 1. The central shaft 4 is arranged in the rotating wheel 2, the rotating wheel 2 is arranged in a round hole 11 of the machine body 1, and the rotating wheel 2 can rotate around the central shaft 4. A plurality of wedge-shaped grooves 8 along the circumferential direction are uniformly arranged on the circumference of a round hole 11 of the machine body 1. The damping body 3 is a stepped shaft with a small middle and two large ends, and the diameters of the large ends at the two ends are equal. The bottom of one end of the big end of the wedge-shaped groove 8 is an arc surface, the radius of the arc is larger than that of the big end of the damping body 3, and one end of the small end of the wedge-shaped groove 8 is a plane tangent to the arc surface of the groove. The wedge-shaped groove 8 is provided with a radial through hole 12 at one end of the arc surface of the big end of the groove and at the position corresponding to the middle shaft of the damping body 3. The body 1 is made of the same material. The machine body 1 is provided with a suspension ring 13. The slow descending rope assembly comprises a guide wheel 72 and a guide wheel shaft 73, the guide wheel 72 is mounted on the guide wheel shaft 73, the guide wheel 72 can rotate on the guide wheel shaft 73, the slow descending rope 71 is clamped between the rotating wheel 2 and the guide wheel 72 and between the guide wheel and the guide wheel, the guide wheel shaft 73 is connected with the front end cover 51, and the central shaft 4 is connected with the front end cover 51 and the rear end cover 52 through a nut 9.

Example two

Referring to fig. 4, this embodiment is different from the first embodiment in that only the circular hole 11 of the machine body 1 is made of nylon material and the housing of the machine body 1 is made of metal material, and the rest is the same as the first embodiment.

Claims

1. The automatic slow descending device comprises a machine body (1), a rotating wheel (2), a damping body (3), a central shaft (4), an end cover (5), a counterweight (6) and a slow descending rope assembly, and is characterized in that: slowly fall rope (71) and set up in grooving (21) of swiveling wheel (2), slowly fall the one end of rope (71) and connect people or the object that must slowly fall, counterweight (6) are connected to the other end, evenly set up several recess (22) on the one end circumference of swiveling wheel (2), set up damping body 3 in recess (22), damping body (3) can slide in recess (22), end cover (5) include front end housing (51) and rear end housing (52) set up respectively in the preceding terminal surface and the rear end face of organism (1), center pin (4) are installed in swiveling wheel (2), execute runner (2) and install in round hole (11) of organism (1), swiveling wheel (2) can rotate around center pin (4), evenly set up several wedge groove (8) along the circumferencial direction on round hole (11) circumference of organism (1).

2. The automatic descent control device according to claim 1, wherein: the damping body (3) is a stepped shaft with a small middle and large ends, and the diameters of the large ends at the two ends are equal.

3. The automatic descent control device according to claim 1 or 2, wherein: the bottom of the big end of the wedge-shaped groove (8) is an arc surface, the radius of the arc is larger than the radius of the big end of the damping body (3), and the small end of the wedge-shaped groove (8) is a plane tangent to the arc surface of the groove.

4. The automatic descent control device according to claim 1, 2 or 3, wherein: a wedge-shaped groove (8) of the machine body (1) is provided with a radial through hole (12) at one end of a groove big end arc surface and at a position corresponding to an intermediate shaft of the damping body (3).

5. The automatic descent control device according to claim 1, wherein: the machine body (1) is made of the same material.

6. The automatic descent control device according to claim 1, wherein: the round hole (11) of the machine body (1) is made of materials with high elasticity, wear resistance and impact resistance which are different from those of the shell of the machine body (1).

7. The automatic descent control device according to claim 1, wherein: the machine body (1) is provided with a hanging ring (13).

8. The automatic descent control device according to claim 1, wherein: the slow descending rope assembly comprises a guide wheel (72) and a guide wheel shaft (73), wherein the guide wheel (72) is installed on the guide wheel shaft (73), the guide wheel (72) can rotate on the guide wheel shaft (73), the slow descending rope (71) is clamped between the rotating wheel (2) and the guide wheel (72) and between the guide wheel and the guide wheel, and the guide wheel shaft (73) is connected with the front end cover (51).

9. The automatic descent control device according to claim 1, wherein: the central shaft (4) is connected with a front end cover (51) and a rear end cover (52) through nuts (9).