CN107902579B

CN107902579B - Pulley protection device of stage single-point crane

Info

Publication number: CN107902579B
Application number: CN201711109745.1A
Authority: CN
Inventors: 陈祖尧; 佟兴; 曹伟生
Original assignee: Wuhu Fantawild Culture Tech Inc
Current assignee: Wuhu Fantawild Culture Tech Inc
Priority date: 2017-11-11
Filing date: 2017-11-11
Publication date: 2023-06-23
Anticipated expiration: 2037-11-11
Also published as: CN107902579A

Abstract

The invention relates to a pulley protection device of a stage single-point crane, which comprises a bottom mounting plate, a side mounting plate and a long shaft connected to the side mounting plate, wherein a conical pulley is arranged on the long shaft, a flywheel mechanism doing centrifugal movement is fixedly connected with the conical pulley, a guide block is fixed on the side mounting plate close to one side of the flywheel mechanism, and a conical cambered surface with gradually increased radius is arranged on the guide block; the conical pulley is uniformly provided with a plurality of rope grooves along the axis; the flywheel mechanism comprises a turntable, swing blocks hinged on the turntable and evenly distributed, and springs with one end connected with the turntable and the other end connected with the swing blocks. The pulley with the conical structure is adopted, so that the bearing capacity of the pulley is greatly enhanced, the abrasion of the same position of the pulley is effectively reduced, the pulley structure is prevented from being broken, the self-adaptive adjustment can be carried out according to the speed of the steel wire rope, the maintenance is not needed, the service life of the pulley is prolonged, the occurrence probability of single-point crane safety accidents is reduced, and the theater maintenance cost is reduced.

Description

Pulley protection device of stage single-point crane

Technical Field

The invention relates to the technical field of steel wire rope pulleys, in particular to a pulley protection device of a stage single-point crane.

Background

In theatre or stage performance, various graceful actions of actors are completed by using a hanging wire in cooperation, and the hanging wire rope is also called single-point hanging on the stage. Because the performer needs to lift to the high-altitude performance through the steel wire rope, the safety of the steel wire rope fixing is particularly important, the steel wire rope is guided by the pulley at the top of the stage, when the motor drives the winding drum to wind and unwind the steel wire rope, the acting force on the pulley is large, the pulley can wear or be stressed excessively to break after working for a long time, serious potential safety hazards are brought to the performer, particularly when the steel wire rope is fast, the pulley bearing force is increased, the service life of the pulley is shortened, and the maintenance cost of a theatre is greatly increased when the pulley is replaced frequently.

Disclosure of Invention

In order to avoid and solve the technical problems, the invention provides a pulley protection device of a stage single-point crane.

The technical problems to be solved by the invention are realized by adopting the following technical scheme:

the utility model provides a pulley protector that stage single-point hung, includes the bottom mounting panel, fixes the side mounting panel of bottom mounting panel left and right sides, connects the major axis on the side mounting panel, install the toper pulley on the major axis, the toper pulley has linked firmly and has installed on the major axis and do centrifugal motion's flywheel mechanism, is fixed with the guide block on the side mounting panel that is close to flywheel mechanism one side, be equipped with on the guide block with flywheel mechanism cooperation and radius gradually increased's toper cambered surface.

As a further improvement of the invention, the tapered pulley is uniformly provided with a plurality of rope grooves along the axis thereof, and transition tapered surfaces are arranged between the adjacent rope grooves.

As a further improvement of the invention, the flywheel mechanism comprises a turntable, a plurality of swinging blocks hinged on the outer circular surface of the turntable and uniformly distributed at intervals, and a spring with one end connected with the turntable and the other end connected with the swinging blocks.

As a further improvement of the invention, the guide blocks are two and are arranged symmetrically up and down on the side mounting plates.

The beneficial effects of the invention are as follows:

the pulley with the conical structure is reasonable in structural design, simple to use and low in manufacturing cost, the bearing capacity of the pulley is greatly enhanced, abrasion of the same position of the pulley is effectively reduced, good guiding performance is guaranteed, the pulley structure is prevented from being broken, self-adaptive adjustment can be carried out according to the speed of a steel wire rope, manual maintenance is not needed, the service life of the pulley is prolonged, the occurrence probability of single-point hanging safety accidents is reduced, and the theater maintenance cost is reduced.

Drawings

The invention will be further described with reference to the drawings and examples.

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic view of the mounting structure of the flywheel mechanism and guide block of the present invention;

fig. 3 is a schematic view of a conical pulley in the present invention.

Detailed Description

The present invention will be further described in the following to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present invention easy to understand.

As shown in fig. 1 to 3, a pulley protector for stage single-point crane comprises a bottom mounting plate 1, side mounting plates 2 fixed on the left side and the right side of the bottom mounting plate 1, and a long shaft 3 connected to the side mounting plates 2, wherein a conical pulley 4 is mounted on the long shaft 3, a flywheel mechanism 5 mounted on the long shaft 3 and doing centrifugal motion is fixedly connected to the conical pulley 4, a guide block 6 is fixed on the side mounting plate 2 near one side of the flywheel mechanism 5, and a conical cambered surface 6a which is matched with the flywheel mechanism 5 and gradually increases in radius is arranged on the guide block 6.

The tapered pulley 4 is uniformly provided with a plurality of rope grooves 4a along the axis thereof, and a transitional conical surface 4b is arranged between the adjacent rope grooves 4 a. In this way, the conical pulley 4 has rope grooves 4 with different diameters, the overall structural strength and stability of the pulley are greatly improved, the forces which the rope grooves 4a at different positions can bear are gradually increased, the abrasion caused by the contact of the pulley and the steel wire rope 7 can be avoided, and the service life of the pulley is prolonged. The transition cone 4b enables a smooth transition of the wire rope 7 between different rope grooves 4 a.

The flywheel mechanism 5 comprises a rotary table 51, a plurality of swinging blocks 52 hinged on the outer circular surface of the rotary table 51 and uniformly distributed at intervals, and a spring 53 with one end connected with the rotary table 51 and the other end connected with the swinging blocks 52. In this way, when the steel wire rope 7 moves on the pulley, the speed is increased continuously, the turntable 51 is driven to rotate at a high speed, the swinging block 52 swings away from the turntable 51 under the action of centrifugal force, a virtual circle with a space diameter larger than that of the turntable 51 and a thrust force is formed, the swinging block 52 moves along the conical cambered surface 6a on the guide block 6, the conical pulley 4 is pushed to move, and therefore the steel wire rope 7 is brought into the rope groove 4a with a larger radius from the rope groove 4a with a smaller radius.

The number of the guide blocks 6 is two, and the guide blocks are symmetrically arranged on the side mounting plates 2. The number of the guide blocks 6 is increased, and the pushing effect of the swing block 52 is improved.

The method of use of the invention is further described below:

when the device is used, when the steel wire rope 7 is wound on the rope groove 4a with the smallest radius on the conical pulley 4, the speed is increased when the motor is started, the speed of the steel wire rope 7 on the conical pulley 4 is increased, the swinging block 52 swings outwards on the turntable 51 under the action of centrifugal force, the swinging block 52 is abutted against the conical cambered surface 6a on the guide block 6, the flywheel mechanism 5 and the conical pulley 4 gradually move away from the guide block 6, and the steel wire rope 7 enters the rope groove 4a with the larger radius through the transitional conical surface 4b to move.

When the speed of the wire rope 7 increases again, the above steps are repeated, and the wire rope 7 enters different rope grooves 4a one by one.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a pulley protector that stage single-point hung, includes bottom mounting panel (1), fixes side mounting panel (2) in bottom mounting panel (1) left and right sides, connects major axis (3) on side mounting panel (2), its characterized in that: the device is characterized in that a conical pulley (4) is arranged on the long shaft (3), a flywheel mechanism (5) which is arranged on the long shaft (3) and performs centrifugal motion is fixedly connected with the conical pulley (4), a guide block (6) is fixed on a side mounting plate (2) which is close to one side of the flywheel mechanism (5), and a conical cambered surface (6 a) which is matched with the flywheel mechanism (5) and has gradually increased radius is arranged on the guide block (6); the tapered pulley (4) is uniformly provided with a plurality of rope grooves (4 a) along the axis thereof, and transition conical surfaces (4 b) are arranged between the adjacent rope grooves (4 a); the flywheel mechanism (5) comprises a rotary table (51), a plurality of swing blocks (52) hinged on the outer circular surface of the rotary table (51) and uniformly distributed at intervals, and a spring (53) with one end connected with the rotary table (51) and the other end connected with the swing blocks (52).

2. The pulley guard of a stage single point crane as claimed in claim 1, wherein: the number of the guide blocks (6) is two, and the guide blocks are symmetrically arranged on the side mounting plates (2) from top to bottom.