WO2013082904A1

WO2013082904A1 - Dead-weight positioning pulley baffle rod frame and crane lifting arm

Info

Publication number: WO2013082904A1
Application number: PCT/CN2012/073821
Authority: WO
Inventors: 雷冀; 赵长春
Original assignee: 湖南三一智能控制设备有限公司; 北京市三一重机有限公司
Priority date: 2011-12-07
Filing date: 2012-04-11
Publication date: 2013-06-13
Also published as: CN102418360B; CN102418360A

Abstract

Disclosed in the present invention is a dead-weight positioning pulley baffle rod frame, which comprises two baffle rod brackets (1), a first connecting rod (2), a second connecting rod (3) and a balance weight rod (4). The baffle rod bracket (1) comprises a first bracket body (11), a second bracket body (12) and a third bracket body (13). One end of the first bracket body (11), the second bracket body (12) and the third bracket body (13) are fixedly connected, and a shaft hole (14) is formed at the joint of the three bracket bodies. An angle is formed between the first bracket body (11) and the third bracket body (13) to about 139 to 188 degrees. Another angle is formed between the first bracket body (11) and second bracket body (12) to about 68 to 131 degrees. The first bracket bodies (11) of the two baffle rod brackets (1) are connected by the first connecting rod (2), the second bracket bodies (12) of the two baffle rod brackets (1) are connected by the second connecting rod (3), and the third bracket bodies (13) of the two baffle rod brackets (1) are connected by the balance weight rod (4). The baffle rod frame is arranged with a pulley coaxially and can rotate relative to the pulley, and can also prevent steel wire ropes, cables and the like from being separated from the pulley. Also disclosed in the present invention is a crane lifting arm which comprises the dead-weight positioning pulley baffle rod frame.

Description

Self-repositioning pulley block and boom The present application is filed on December 7, 2011 in the Chinese Patent Office, the application number is 201110404393.9, and the invention is entitled "self-weighting pulley block and boom" Priority is hereby incorporated by reference in its entirety.

Technical field

The invention relates to the field of construction machinery, in particular to a self-weighting pulley block and a lifting arm.

Background technique

For construction machinery, such as underground continuous wall grabs, the top end of the boom wire ropes, cables, etc., are connected to the lower working device. To prevent the wire ropes, cables, etc. from coming off the pulley, it is necessary to protect the wire ropes, cables, etc. from the pulleys. The slot slides out. Currently, the most common method is to add a protective cover to the outside of the pulley, and the protective cover is fixedly mounted concentrically with the pulley. Since the shield is fixedly connected to the pulley, the shield cannot be automatically adjusted depending on the specific position of the pulley.

Summary of the invention

The invention provides a self-repositioning pulley block frame, which can be rotated relative to the pulley to perform self-adjusting positioning to ensure that the wire rope and the cable are less damaged, and the wire rope and the cable are prevented from coming off the pulley. Another aspect of the present invention also provides a hoisting arm having the above self-weighting pulley block.

The invention provides a self-repositioning pulley block frame, which comprises two bar brackets, a first link, a second link and a weight bar. The brace bracket includes a first bracket body, a second bracket body, and a third bracket body; one ends of the first bracket body, the second bracket body, and the third bracket body are fixedly connected, and the three brackets are fixedly connected A shaft hole is disposed at the joint of the body; and 139 is formed between the first bracket body and the third bracket body. Arranging at 188° degrees; the first bracket body and the second bracket body are arranged at 68° to 131°; the first bracket body of the two bar brackets passes through the first joint Connecting the rods; connecting the second bracket bodies of the two baffle brackets by the second link; and passing the weight rods between the third bracket bodies of the two baffle brackets connection.

Further, the shaft hole opens into a gap of a diameter width in a direction of the weight bar. Further, a backing plate is disposed on an end surface of the shaft hole.

Further, the first bracket body is fixedly connected or rotatably connected to the first link. Further, the second bracket body is fixedly connected or rotatably connected to the second link. Further, the third bracket body is fixedly connected or rotatably connected to the weight rod.

Further, the fixed connection manner of the third bracket body and the weight is welded or screwed.

Further, the rotational connection manner of the third bracket body and the weight bar is a pin connection. Further, the first bracket body, the second bracket body and the third bracket body are a unitary structure. The invention further provides a boom comprising an arm body and a pulley connected to the arm body, and any one of the above The self-weighting pulley block is coaxially mounted on the outer side of the pulley and rotatable relative to the pulley.

The self-repositioning pulley block frame of the invention is mounted coaxially with the pulley and can rotate relative to the pulley. During the rotation of the boom, the weight of the weight bar under the bar holder is used, and the bar holder can be self-adjusting and rotating, so that the bar holder is always in a state, that is, the weight bar is always at the bottom of the vertical direction. The wire rope and the cable are always not in contact with the bar holder, and the wire rope and the cable are less damaged, and the wire rope and the cable are prevented from being separated from the cable pulley.

DRAWINGS

1 is a schematic structural view of a self-repositioning pulley block of the present invention;

2 is a schematic structural view of a baffle bracket according to the present invention;

FIG. 3 is a schematic view showing the installation of the self-repositioning pulley block frame of the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Example 1:

Referring to FIG. 1 and FIG. 2, FIG. 1 is a schematic structural view of a self-weighting pulley block frame according to the present invention, and FIG. 2 is a schematic structural view of a bar bracket according to the present invention.

The invention provides a self-repositioning pulley block frame, comprising two bar brackets 1, a first link 2, a second link 3 and a weight bar 4. The brace bracket 1 includes a first bracket body 11, a second bracket body 12, and a third bracket body 13. First bracket body 11, second bracket body 12 and third bracket One end of the body 13 is fixedly connected, and a shaft hole 14 is provided at the joint of the three bracket bodies. And the first bracket body 11 and the third bracket body 13 are arranged at an angle. The first bracket body 11 and the second bracket body 12 are arranged at an angle. The first bracket bodies 11 of the two bar brackets are connected by a first connecting rod 2, and the second bracket bodies 12 of the two baffle brackets are connected by a second connecting rod 3, the two baffle brackets The third bracket bodies 13 are connected by a weight bar 4.

Preferably, a notch 5 is opened in the direction of the shaft hole 14 toward the weight bar 4, and the width of the notch 5 is the same as the diameter of the shaft hole 14. The notch 5 facilitates the installation of the bar holder and the pulley.

The first bracket body 11, the second bracket body 12 and the third bracket body 13 may be fixedly connected, preferably welded; the three bracket bodies may also be processed into a unitary structure.

Preferably, a backing plate 16 is provided at the end face of the shaft hole 14.

In a specific implementation, the first bracket body 11 and the third bracket body 13 are 139. ~188° layout, of which 172. ~ 180° is preferred. The first bracket body 11 and the second bracket body 12 are arranged at an angle of 68° to 131°, of which 90° is preferred.

The first bracket body 11 and the first link 2, the second bracket body 12 and the second link 3, and the third bracket body 13 and the weight bar 4 are fixedly connected or rotatably connected. For fixed connections, soldering and threaded connections are preferred. When the connection is rotated, the pin connection is preferred.

Boom embodiment:

Referring to FIG. 3, FIG. 3 is a schematic view showing the installation of the self-repositioning pulley block.

The invention also provides a lifting arm, comprising an arm body and a pulley 6 connected to the arm body, and a pulley bar frame, which is the self-weighting pulley bar frame of the embodiment 1, the self-weighting pulley bar The frame is coaxially mounted on the outer side of the pulley 6, and is rotatable relative to the pulley 6.

As shown in Figure 3, the pulley bar bracket is mounted on the boom. The pulley bar holder 1 protects the wire rope and the cable, prevents the wire rope and the cable from coming off the pulley 6, and the pulley 6 rotates with the boom. In the process, the gravity of the weight bar 4 below the pulley bar can be used. The pulley bar holder is always in a positional state, ie for the pulley bar holder 1, the weight bar 4 is always in the vertical direction The lowest point of the position, the position state can ensure that the wire rope and the cable are less damaged, and the wire rope and the cable are protected.

Working principle: Using the gravity of the weight bar 4 below the baffle frame 1, the baffle frame 1 can be continuously self-adjusted according to the change of the position of the pulley 6, so that the brace frame 1 is always in a position state, that is, the bar The weight bar 4 on the frame 1 is located at the lowest point in the vertical direction.

The self-repositioning pulley block frame of the invention is mounted coaxially with the pulley and can rotate relative to the pulley. During the rotation of the boom, the weight of the weight bar under the bar holder is used, and the bar holder can be self-adjusting and rotating, so that the bar holder is always in a state, that is, the weight bar is always at the lowest point in the vertical direction. The wire rope and the cable are always not in contact with the bar holder, and the wire rope and the cable are less damaged, and the wire rope and the cable are prevented from coming off the pulley.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

Rights request

1. A self-repositioning pulley block frame, characterized in that

The utility model comprises two bar brackets (1), a first link (2), a second link (3) and a weight bar (4); wherein

The brace bracket (1) includes a first bracket body (11), a second bracket body (12) and a third bracket body (13);

One ends of the first bracket body (11), the second bracket body (12) and the third bracket body (13) are fixedly connected, and a shaft hole (14) is disposed at a joint of the three bracket bodies;

139 is formed between the first bracket body (11) and the third bracket body (13). -188° degree arrangement;

The first bracket body (11) and the second bracket body (12) are 68. ~131° degree arrangement;

The first bracket bodies (11) of the two bar brackets are connected by the first link (2);

The second bracket bodies (12) of the two bar brackets are connected by the second link (3);

The third bracket bodies (13) of the two bar brackets are connected by the weight bar (4).

The self-weighting pulley bar frame according to claim 1, characterized in that the shaft hole (14) has a notch (5) of a diameter width in the direction of the weight bar (4).

A self-weighting pulley bar frame according to claim 2, wherein a spacer (16) is provided at an end surface of the shaft hole (14).

The self-weighting pulley bar frame according to any one of claims 1-3, characterized in that the first bracket body (11) is fixedly connected or rotatably connected to the first link (2).

The self-weighting pulley bar frame according to any one of claims 1-3, characterized in that the second bracket body (12) is fixedly connected or rotatably connected to the second link (3).

6. Self-weighting pulley bar frame according to any of claims 1-3, characterized in that the third bracket body (13) is fixedly connected or rotatably connected to the weight bar (4).

The self-weighting pulley bar frame according to claim 6, wherein the third bracket body (13) and the weight (4) are fixedly connected by welding or screwing.

The self-weighting pulley bar frame according to claim 6, wherein the third bracket body (13) and the weight bar (4) are connected by a pin connection.

The self-weighting pulley bar frame according to any one of claims 1 to 8, wherein the first bracket body (11), the second bracket body (12) and the third bracket body (13) ) is a one-piece structure.

A lifting arm comprising an arm body and a pulley (6) connected to the arm body, characterized by further comprising the self-weighting pulley bar holder according to any one of claims 1-9. The self-repositioning pulley block is coaxially mounted on the outside of the pulley and is rotatable relative to the pulley.