CN219217311U

CN219217311U - Fixed pulley block and balance arm assembly mechanism

Info

Publication number: CN219217311U
Application number: CN202223364860.2U
Authority: CN
Inventors: 项鑫; 唐坤; 周建宇; 孙淑娜; 徐斯鹏; 张学武; 林飞虎; 付瑞; 王森
Original assignee: Henan Weihua Heavy Machinery Co Ltd
Current assignee: Henan Weihua Heavy Machinery Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-06-20
Anticipated expiration: 2032-12-15

Abstract

The utility model relates to a fixed pulley block and a balance arm assembly mechanism in the technical field of cranes, which comprises a pulley cover, wherein the middle part of the inner side of the pulley cover is rotationally connected with the fixed pulley block, the center position of the top of the pulley cover is rotationally connected with a balance arm, and the central axis of the balance arm and the rotation central axis of the fixed pulley block are positioned on the same vertical line. Due to the arrangement of the balance arm and the fixed pulley block, the whole pulley cover is uniformly stressed, and the technical problem that the service life of the fixed pulley bracket is influenced to a certain extent due to the fact that the fixed pulley bracket is subjected to larger deflection force in the prior art is solved.

Description

Fixed pulley block and balance arm assembly mechanism

Technical Field

The utility model relates to the technical field of cranes, in particular to a fixed pulley block and balance arm assembly mechanism.

Background

The fixed pulley and the balance arm of the general crane trolley are of split type structures, and the steel wire ropes are wound by being arranged between the fixed pulley block and the balance arm separately, so that the structure can meet the national standard requirements and the basic requirements of equipment operation, but the following defects are found in the use process: 1. for old and old plants with small areas and small limit requirements and newly purchased equipment, the crane is difficult to meet the use requirement due to the limited plant area or the maximum utilization of the land area; 2. the balance arm is arranged on one side of the fixed pulley and can often generate larger deflection force, so that the service life of the steel structure of the trolley is influenced to a certain extent.

At present, the current chinese patent with publication number CN206318627U discloses a fixed pulley assembly with a balance arm for a crane, the structure is shown in fig. 1, which includes a rotating shaft on a fixed pulley support, the balance arm is rotatably mounted on the fixed pulley support through the rotating shaft, the device solves the

above defects

1 and 2, but has new defects: the balance arm is correspondingly positioned on one side of the fixed pulley bracket, so that the fixed pulley bracket receives larger deflection force, and the service life of the fixed pulley bracket is influenced to a certain extent.

Disclosure of Invention

The present utility model has been made to solve the above-mentioned problems, and an object of the present utility model is to provide a fixed pulley block and a balance arm assembly mechanism.

The utility model realizes the above purpose through the following technical scheme:

the utility model provides a fixed pulley group and balance arm assembly devices, includes the pulley cover, the inboard middle part rotation of pulley cover is connected with the fixed pulley group, pulley cover top central point puts and rotates and be connected with the balance arm, the central axis of balance arm and the gyration central axis of fixed pulley group are located same plumb line.

Preferably, the balance arm comprises a main body, the central position of the main body is correspondingly hinged with the pulley cover, the two ends of the main body are correspondingly hinged with connecting parts for connecting the steel wire ropes, and the rotation central axis of the connecting parts is parallel to the rotation central axis of the main body.

Preferably, the top of the pulley cover is of a horizontal plane structure.

Preferably, the two sides of the top surface of the pulley cover are respectively provided with an extension part extending to the two sides of the pulley cover, and a reinforcing plate perpendicular to the side surface of the pulley cover is arranged between the side surface of the pulley cover and the bottom surface of the extension part.

Preferably, the center of the top surface of the pulley cover is detachably connected with a balance arm seat, and the balance arm seat is rotationally connected with the balance arm through a pin shaft.

The beneficial effects are that:

1. due to the arrangement of the balance arm and the fixed pulley block, the whole pulley cover is uniformly stressed, and the technical problem that the service life of the fixed pulley bracket is influenced to a certain extent due to the fact that the fixed pulley bracket is subjected to larger deflection force in the prior art is solved;

2. due to the arrangement of the balance arm, when the main body rotates, the connecting part rotates along with the main body, so that the connecting part is coaxial with the corresponding steel wire rope, the steel wire rope included angle between the balance arm and the movable pulley block is reduced, the relative rotation angle between the steel wire rope and the balance arm is also reduced, and the abrasion of the steel wire rope is further reduced;

3. on the whole, not only the included angle between the balance arm and the movable pulley block of the steel wire rope is greatly reduced, the service life of the crane is prolonged, but also the arrangement of each mechanism of the trolley is more compact, so that the left and right limits of the lifting hook are reduced, and the operation range of the crane is lifted.

Additional features and advantages of the utility model will be set forth in the description which follows, or may be learned by practice of the utility model.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a front view of the present utility model;

fig. 3 is a side view of the present utility model.

The reference numerals are explained as follows:

1. a pulley cover; 11. an extension; 2. a fixed pulley block; 3. a balance arm; 31. a main body; 32. a connection part; 4. a reinforcing plate; 5. balance arm seat.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

2-3, a fixed pulley block and balance arm assembly mechanism comprises a pulley cover 1, wherein the bottoms of two side surfaces of the pulley cover 1 are respectively provided with a connecting structure with the outer edge extending horizontally, and the connecting structure is connected to a crane trolley frame through bolts during installation;

the fixed pulley block 2 is rotationally connected to the middle part of the inner side of the pulley cover 1, that is, the fixed pulley position in the fixed pulley block 2 is correspondingly positioned below the center of the pulley cover 1 under the traction force of the steel wire rope, so that the pulley cover 1 can hardly receive deflection force; the central position of the top of the pulley cover 1 is rotationally connected with a balance arm 3, in the embodiment, the top of the pulley cover 1 is integrally formed with a U-shaped structure, and the U-shaped structure is rotationally connected with the balance arm 3 through a pin shaft; in another embodiment, the top of the pulley cover 1 is of a horizontal plane structure, the center of the horizontal plane structure is connected with a balance arm seat 5 through a bolt, specifically, the balance arm seat 5 is a U-shaped piece, the middle of the balance arm seat 5 is rotationally connected with a balance arm 3 through a pin shaft, in order to increase the strength of the balance arm seat 5 and the pulley cover 1, the two sides of the horizontal plane structure at the top of the pulley cover 1 are respectively provided with an extension part 11 extending to the two sides of the pulley cover 1, and a reinforcing plate 4 vertical to the side surface of the pulley cover 1 and the bottom surface of the extension part 11 is arranged between the side surface of the pulley cover 1 and the bottom surface of the extension part;

the central axis of the balance arm 3 and the rotation central axis of the fixed pulley block 2 are positioned on the same vertical line, specifically, the central axis of the balance arm 3 and the central axis of the fixed pulley block 2 are both horizontal lines, the different planes are vertical, and the rotation central axis of the balance arm 3 and the rotation central axis of the fixed pulley block 2 are both horizontal lines, and the different planes are vertical.

In the scheme, due to the arrangement of the balance arm 3 and the fixed pulley block 2, the whole pulley cover 1 is uniformly stressed, and the technical problem that the service life of the fixed pulley bracket is influenced to a certain extent due to the fact that the fixed pulley bracket is subjected to larger deflection force in the prior art is solved.

In the second embodiment, as shown in fig. 3, to further reduce the angle between the balance arm 3 and the movable pulley block, the balance arm 3 includes a main body 31, the central position of the main body 31 is hinged to the fixed pulley block 2, specifically, the main body 31 is hinged to the U-shaped structure or the balance arm seat 5 through a pin shaft, two ends of the main body 31 are hinged to a connecting portion 32 for connecting the steel wire rope, the rotation central axis of the connecting portion 32 is parallel to the rotation central axis of the main body 31, and the connecting portion 32 is hinged to the end of the main body 31 through a pin shaft as required, so that the relative rotation angle between the steel wire rope and the balance arm 3 is reduced, and abrasion of the steel wire rope is reduced.

To further reduce the wear of the wire rope, the inner side of the connecting portion 32 is provided with a wire wheel, and the outer end of the wire rope is locked on the wire rope body by a rope lock after bypassing the wire wheel.

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

Claims

1. The utility model provides a fixed pulley group and balance arm assembly devices which characterized in that: the pulley cover comprises a pulley cover (1), a fixed pulley block (2) is rotationally connected to the middle part of the inner side of the pulley cover (1), a balance arm (3) is rotationally connected to the central position of the top of the pulley cover (1), and the central axis of the balance arm (3) and the rotation central axis of the fixed pulley block (2) are located on the same vertical line.

2. The fixed pulley block and balance arm assembly mechanism of claim 1, wherein: the balance arm (3) comprises a main body (31), the central position of the main body (31) is correspondingly hinged with the pulley cover (1), the two ends of the main body (31) are correspondingly hinged with connecting portions (32) for connecting steel wires, and the rotation central axis of the connecting portions (32) is parallel to the rotation central axis of the main body (31).

3. The fixed pulley block and balance arm assembly mechanism according to claim 1 or 2, wherein: the top of the pulley cover (1) is of a horizontal plane structure.

4. A fixed pulley block and balance arm assembly mechanism according to claim 3, wherein: the pulley cover (1) is characterized in that extension parts (11) extending to the two sides of the pulley cover (1) are arranged on the two sides of the top surface of the pulley cover (1), and a reinforcing plate (4) perpendicular to the pulley cover is arranged between the side surface of the pulley cover (1) and the bottom surface of the extension part (11).

5. A fixed pulley block and balance arm assembly mechanism according to claim 3, wherein: the pulley cover (1) is characterized in that a balance arm seat (5) is detachably connected to the center of the top surface of the pulley cover, and the balance arm seat (5) is rotatably connected with the balance arm (3) through a pin shaft.