CN216973532U

CN216973532U - Movable arm rotation structure for excavator

Info

Publication number: CN216973532U
Application number: CN202220459970.8U
Authority: CN
Inventors: 吕荣昌
Original assignee: Tianjin Yuante Machinery Parts Co ltd
Current assignee: Tianjin Yuante Machinery Parts Co ltd
Priority date: 2022-03-04
Filing date: 2022-03-04
Publication date: 2022-07-15
Anticipated expiration: 2032-03-04

Abstract

The utility model discloses a movable arm rotation structure for an excavator, which comprises an adjustable small arm assembly; the adjustable small arm assembly comprises a large arm connecting piece, a lengthened arm is fixedly connected with the large arm connecting piece, the small arm is sleeved on the lengthened arm in a sliding mode, adjusting oil cylinders are symmetrically arranged on the two sides of the large arm connecting piece and the small arm, one end of each adjusting oil cylinder is connected with the large arm connecting piece, the other end of each adjusting oil cylinder is connected with the small arm, and one end, far away from the large arm connecting piece, of the small arm bends downwards by 15-30 degrees. The movable arm rotating structure has the advantages of adjustable arm length, higher adaptability, large earth excavation amount and high construction efficiency.

Description

Movable arm rotation structure for excavator

Technical Field

The utility model relates to a movable arm rotating structure for an excavator.

Background

The excavator is a very common tool in the construction field and is suitable for severe construction environments. The excavator is mainly used for earth excavation and material transfer in the carrying. Specific to some special construction environments, a special long-arm excavator is provided. In the excavating process of the excavator, when the arm length is insufficient, the long-arm excavator is called, the time consumption is long, and the manufacturing cost is high. Moreover, some common excavators cannot reach the position, the length of the long-arm excavator is too long, and excavation by the long-arm excavator is also very inconvenient. Therefore, a boom swing structure for a general excavator, which has an adjustable arm length, is urgently needed to improve the adaptability of the excavator.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defects or shortcomings in the prior art, it is desirable to provide a boom swing structure for an excavator, which has an adjustable arm length, higher adaptability, a large earth excavation amount, and high construction efficiency.

The utility model provides a movable arm rotation structure for an excavator, which comprises an adjustable small arm assembly; the adjustable small arm assembly comprises a large arm connecting piece, the large arm connecting piece is fixedly connected with an extension arm, the extension arm is sleeved with a small arm in a sliding mode, adjusting oil cylinders are symmetrically arranged on the two sides of the large arm connecting piece and the small arm, one end of each adjusting oil cylinder is connected with the large arm connecting piece, the other end of each adjusting oil cylinder is connected with the small arm, and one end, far away from the large arm connecting piece, of the small arm bends downwards by 15-30 degrees.

Further, the movable arm rotating structure for the excavator further comprises a large arm and large arm oil cylinders symmetrically arranged on two sides of the large arm; one end of the large arm is rotatably connected with the excavator frame body, and the other end of the large arm is rotatably connected with the large arm connecting piece; one end of the large arm oil cylinder is rotatably connected with the excavator frame body, and the other end of the large arm oil cylinder is rotatably connected with the large arm; and a small arm oil cylinder is arranged above the large arm, one end of the small arm oil cylinder is rotatably connected with the large arm, and the other end of the small arm oil cylinder is rotatably connected with the large arm connecting piece.

Furthermore, the one end that big arm connecting piece was kept away from to the forearm rotates and is connected with the scraper bowl, be provided with the bracket component between scraper bowl and the forearm, the top of forearm is provided with the scraper bowl hydro-cylinder, the one end and the forearm of scraper bowl hydro-cylinder rotate to be connected, and the other end rotates with the bracket component to be connected.

Furthermore, the bracket component include with the scraper bowl connecting piece that the scraper bowl is connected, the bilateral symmetry that the forearm is close to the one end of scraper bowl is provided with the bracing piece, the one end and the forearm of bracing piece rotate to be connected, the other end with the one end that the scraper bowl was kept away from to the scraper bowl connecting piece rotates to be connected, the one end that the scraper bowl hydro-cylinder is close to the scraper bowl with the one end that the scraper bowl was kept away from to the scraper bowl connecting piece rotates to be connected.

Compared with the prior art, the utility model has the beneficial effects that:

the movable arm rotating structure is provided with the adjustable small arm assembly, the total arm length of the excavator can be adjusted through the matching of the lengthened arm, the small arm and the adjusting oil cylinder, and the application range of the excavator is greatly improved. When the excavator works in a long arm state, the bucket is often retracted to a limit angle, the front end of the small arm is bent downwards by 15-30 degrees, the space between the small arm and the bucket is increased, the single loading capacity of the bucket is increased, and the construction efficiency is effectively improved.

It should be understood that what is described in this summary section is not intended to limit key or critical features of the embodiments of the utility model, nor is it intended to limit the scope of the utility model. Other features of the present invention will become apparent from the following description.

Drawings

Other features, objects and advantages of the utility model will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:

fig. 1 is a schematic structural view of a boom swing structure for an excavator.

Reference numbers in the figures: 1. an adjustable forearm assembly; 2. a large arm; 3. a bucket; 4. a bracket assembly; 11. a large arm connecting member; 12. a lengthening arm; 13. a small arm; 14. adjusting the oil cylinder;

21. a large arm cylinder; 22. a small arm cylinder;

31. a bucket cylinder;

41. a bucket attachment; 42. a support rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the utility model. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1, an embodiment of the present invention provides a swing arm revolving structure for an excavator, including an adjustable arm assembly 1; the adjustable small arm assembly 1 comprises a large arm connecting piece 11, an elongated arm 12 is fixedly connected to the large arm connecting piece 11, a small arm 13 is sleeved on the elongated arm 12 in a sliding mode, adjusting oil cylinders 14 are symmetrically arranged on two sides of the large arm connecting piece 11 and the small arm 13, one end of each adjusting oil cylinder 14 is connected with the large arm connecting piece 11, the other end of each adjusting oil cylinder 14 is connected with the small arm 13, and one end, far away from the large arm connecting piece 11, of the small arm 13 is bent downwards by 15-30 degrees.

In this embodiment, when the excavator excavates, along with the increase of excavation depth, meet the circumstances that the excavation position can not reach enough, the control adjusts the extension of hydro-cylinder 14, and drive forearm 13 slides along extension arm 12, increases the total length of adjustable forearm subassembly 1, has increased the effective excavation scope of excavator, has improved the application scope of excavator.

When an excavator works in a long arm state, the bucket often needs to be retracted to a limit angle. The front end of the small arm is bent downwards by 15-30 degrees, and when the bucket contracts to a limit angle, the space between the small arm 13 and the bucket is increased, the single loading capacity of the bucket is increased, and the construction efficiency is effectively improved.

In a preferred embodiment, as shown in fig. 1, the boom swing structure for the excavator further includes a boom 2 and boom cylinders 21 symmetrically disposed at both sides of the boom 2; one end of the big arm 2 is rotationally connected with the excavator frame body, and the other end of the big arm 2 is rotationally connected with the big arm connecting piece 11; one end of the large arm oil cylinder 21 is rotatably connected with the excavator frame body, and the other end of the large arm oil cylinder is rotatably connected with the large arm 2; a small arm oil cylinder 22 is arranged above the large arm 2, one end of the small arm oil cylinder 22 is rotatably connected with the large arm 2, and the other end of the small arm oil cylinder 22 is rotatably connected with the large arm connecting piece 11.

In the embodiment, the angle of the boom 2 is controlled by the boom cylinder 21, the angle of the adjustable small boom assembly 1 is controlled by the small boom cylinder 22, and the boom swing structure of the excavator is formed by matching with the extension and contraction of the adjustable small boom assembly 1, so that the operation is flexible and the adaptability is higher.

In a preferred embodiment, as shown in fig. 1, one end of the small arm 13 far away from the large arm connecting piece 11 is rotatably connected with the bucket 3, a bracket assembly 4 is arranged between the bucket 3 and the small arm 13, a bucket cylinder 31 is arranged above the small arm 13, one end of the bucket cylinder 31 is rotatably connected with the small arm 13, and the other end is rotatably connected with the bracket assembly 4. The excavation work of the bucket 3 is realized by the telescopic control of the bucket cylinder 31 in cooperation with the transmission of the bracket assembly 4.

In a preferred embodiment, as shown in fig. 1, the bracket assembly 4 includes a bucket attachment 41 connected to the bucket 3, the support rods 42 are symmetrically disposed on both sides of one end of the arm 13 near the bucket 3, one end of the support rod 42 is rotatably connected to the arm 13, the other end is rotatably connected to one end of the bucket attachment 41 far away from the bucket 3, and one end of the bucket cylinder 31 near the bucket 3 is rotatably connected to one end of the bucket attachment 41 far away from the bucket 3. With the engagement of the bucket attachment 41 with the support bar 42, a wide angle drive of the bucket 3 is achieved.

In the description of the present specification, the terms "connect", "mount", "fix", and the like are to be understood in a broad sense, for example, "connect" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, the description of the terms "one embodiment," "some embodiments," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A movable arm rotation structure for an excavator is characterized by comprising an adjustable small arm assembly; the adjustable small arm assembly comprises a large arm connecting piece, the large arm connecting piece is fixedly connected with an extension arm, the extension arm is sleeved with a small arm in a sliding mode, adjusting oil cylinders are symmetrically arranged on the two sides of the large arm connecting piece and the small arm, one end of each adjusting oil cylinder is connected with the large arm connecting piece, the other end of each adjusting oil cylinder is connected with the small arm, and one end, far away from the large arm connecting piece, of the small arm bends downwards by 15-30 degrees.

2. The boom swing structure for the excavator according to claim 1, further comprising a boom and boom cylinders symmetrically disposed at both sides of the boom; one end of the large arm is rotatably connected with the excavator frame body, and the other end of the large arm is rotatably connected with the large arm connecting piece; one end of the large arm oil cylinder is rotatably connected with the excavator frame body, and the other end of the large arm oil cylinder is rotatably connected with the large arm; and a small arm oil cylinder is arranged above the large arm, one end of the small arm oil cylinder is rotatably connected with the large arm, and the other end of the small arm oil cylinder is rotatably connected with the large arm connecting piece.

3. The boom slewing structure for the excavator according to claim 2, wherein a bucket is rotatably connected to an end of the arm remote from the arm connecting member, a bracket assembly is provided between the bucket and the arm, a bucket cylinder is provided above the arm, one end of the bucket cylinder is rotatably connected to the arm, and the other end of the bucket cylinder is rotatably connected to the bracket assembly.

4. The boom swing structure for the excavator according to claim 3, wherein the bracket assembly includes a bucket attachment connected to the bucket, support rods are symmetrically disposed on both sides of one end of the arm close to the bucket, one end of each support rod is rotatably connected to the arm, the other end of each support rod is rotatably connected to one end of the bucket attachment far from the bucket, and one end of the bucket cylinder close to the bucket is rotatably connected to one end of the attachment far from the bucket.