Rotating structure of grab bucket lug plate shaft

Abstract

The utility model discloses a rotating structure of a grab bucket lug plate shaft, which is characterized in that a plurality of groups of bearing groups which are coaxial with a mounting opening and are matched with the lug plate shaft are arranged in the mounting opening of a bucket part, and each group of bearing group comprises at least two rolling bearings; a spacer ring and a piston ring which are coaxial with the rolling bearings are arranged between every two adjacent rolling bearings in each bearing set, the lug plate shaft penetrates through the multiple bearing sets to be rotationally connected with the bucket part, the two ends of the installation opening are detachably provided with end covers used for limiting, clamping and blocking the bearing sets in the installation opening, and waterproof felts are arranged between the end covers and the adjacent bearing sets. By adopting the rotating mode of the rolling bearing, not only is the abrasion at the lug plate shaft greatly reduced and the rotating smoothness of a lug plate shaft rotating pair increased, but also the sealing performance is effectively improved through the arrangement of the waterproof felt and the shaft sleeve, the influence of severe working conditions on the lug plate shaft rotating pair is reduced, and the service life of the grab bucket is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lifting machinery, in particular to a rotating structure of a grab bucket ear plate shaft. Background Art

[0002] A lifting grab is a common lifting tool, mainly used for material handling and loading and unloading operations in various industrial and construction fields. It is efficient, flexible and reliable, can improve work efficiency, reduce manpower input, and is suitable for materials of different types and sizes.

[0003] During the use of the grab, the rotating pair between the ear plate shaft and the bucket part greatly affects the service life and maintenance cycle of the grab. During the installation and use of the existing ear plate shaft and the bucket part, most of them are installed and rotated using sliding bearings or rolling bearings. Among them, the sliding bearing installation method causes greater wear on the ear plate shaft and the smoothness of the rotating pair is not ideal. Although the rolling bearing installation method can effectively ensure the smoothness of the rotation of the ear plate shaft, its stability and sealing are poor, especially under harsh working conditions, it is very easy to cause wear and tear, affecting the service life of the grab. Utility Model Content

[0004] In order to overcome the deficiencies in the background technology, the utility model discloses a rotation structure of a grab bucket ear plate shaft, which adopts a rotation method of a rolling bearing, not only greatly reduces the wear at the ear plate shaft, increases the rotation smoothness of the ear plate shaft rotating pair, but also effectively improves its sealing performance through the arrangement of waterproof felt and shaft sleeves, reduces the influence of harsh working conditions on the rotating pair at the ear plate shaft, and increases the life of the grab bucket.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A rotating structure of an ear plate shaft of a grab bucket comprises a bucket portion and an ear plate shaft installed in a mounting opening of the bucket portion; an array of bearing groups coaxially arranged with the mounting opening and adapted to the ear plate shaft are arranged in the mounting opening of the bucket portion; each bearing group comprises at least two rolling bearings; a spacer ring and an expansion ring coaxially arranged with the rolling bearings are arranged between two adjacent rolling bearings in each bearing group; the ear plate shaft penetrates the array of bearing groups and is rotatably connected to the bucket portion; end covers for limiting the bearing groups in the mounting opening are detachably installed at both ends of the mounting opening; waterproof felt is arranged between the end covers and the adjacent bearing groups.

[0007] Furthermore, a shaft sleeve c is provided between the inner wall of the mounting opening and the outer ring surface of the bearing assembly.

[0008] Furthermore, the inner diameter of the spacer ring is matched with the inner diameter of the inner ring of the rolling bearing, and the outer diameter of the spacer ring is smaller than the outer diameter of the inner ring of the rolling bearing.

[0009] Furthermore, the inner diameter of the expansion ring is larger than the outer diameter of the inner ring of the rolling bearing, and the outer diameter of the expansion ring is matched with the outer diameter of the outer ring of the rolling bearing.

[0010] Furthermore, a shaft sleeve b coaxially arranged with the mounting opening is provided between each adjacent bearing group, and the inner diameter of the shaft sleeve b is matched with the inner diameter of the rolling bearing.

[0011] Furthermore, the end cover is an annular structure, and a shaft sleeve a is provided between the inner annular surface of the end cover and the ear plate shaft.

[0012] Furthermore, the end cover is provided with a fastening screw threadably connected to the bucket portion.

[0013] Compared with the prior art, the utility model has the following beneficial effects: by setting the bearing group, the flexible rotation between the ear plate shaft and the bucket part can be realized, the wear of the ear plate shaft can be reduced, and the service life of the grab bucket can be increased;

[0014] By setting the spacer ring and the expansion ring, the spacing between the bearings in the bearing group can be further ensured to be stable and firm, thus prolonging the service life of the bearing group;

[0015] By installing waterproof felt, the bearing group can be effectively protected from water, reducing the impact of harsh working conditions on the rotating pair at the lug shaft.

[0016] By setting multiple sleeves, not only the stability of the bearing group can be improved, but also the wear of the bearing group can be reduced, providing strong support for the flexible rotation of the ear plate shaft;

[0017] The utility model adopts the rotation mode of rolling bearing, which not only greatly reduces the wear of the ear plate shaft and increases the rotation smoothness of the ear plate shaft rotating pair, but also effectively improves its sealing performance through the arrangement of waterproof felt and shaft sleeve, reduces the influence of harsh working conditions on the rotating pair of the ear plate shaft, and increases the life of the grab. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] In the figure: 1. bucket; 2. fastening screws; 3. end cover; 4. waterproof felt; 5. sleeve a; 6. bearing group; 7. ear plate shaft; 8. sleeve b; 9. spacer ring; 10. expansion ring; 11. sleeve c. DETAILED DESCRIPTION

[0020] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present invention and are for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0021] Please refer to the instruction manual Figure 1 , the utility model provides a technical solution:

[0022] Embodiment 1, a rotating structure of a grab bucket ear plate shaft, comprising a bucket portion 1, and an ear plate shaft 7 installed in a mounting opening of the bucket portion 1, wherein an array of bearing groups 6 coaxially arranged with the mounting opening and adapted to the ear plate shaft 7 are arranged in the mounting opening of the bucket portion 1, wherein each bearing group 6 comprises at least two rolling bearings, and by adopting rolling bearings, the wear of the ear plate shaft 7 is greatly reduced compared with traditional sliding bearings, and the rotation smoothness of the rotating pair of the ear plate shaft 7 is increased, and a spacer ring 9 and an expansion ring 10 coaxially arranged with the rolling bearings are arranged between two adjacent rolling bearings in each bearing group 6, specifically The inner diameter of the spacer ring 9 is matched with the inner diameter of the inner ring of the rolling bearing, the outer diameter of the spacer ring 9 is smaller than the outer diameter of the inner ring of the rolling bearing, the inner diameter of the expansion ring 10 is larger than the outer diameter of the inner ring of the rolling bearing, and the outer diameter of the expansion ring 10 is matched with the outer diameter of the outer ring of the rolling bearing, that is, the spacer ring 9 is arranged on the side close to the inner ring of the rolling bearing, and the expansion ring 10 is arranged on the side close to the outer ring of the rolling bearing. The ear plate shaft 7 passes through the array bearing group 6 and is rotatably connected with the bucket part 1. End covers 3 for limiting the bearing group 6 in the installation port are provided at both ends of the installation port, and a waterproof felt 4 is provided between the end cover 3 and the adjacent bearing group 6.

[0023] Embodiment 2, in order to effectively improve the sealing performance of the bearing group 6 and ensure its rotation stability, a sleeve c11 is provided between the inner wall of the installation port and the outer ring surface of the bearing group 6, and a sleeve b8 is provided coaxially with the installation port between each adjacent bearing group 6, the inner diameter of the sleeve b8 is matched with the inner diameter of the rolling bearing, the end cover 3 is an annular structure, and a sleeve a5 is provided between the inner ring surface of the end cover 3 and the ear plate shaft 7. The arrangement of the sleeve c11 and the sleeve b8 can not only improve the stability of the bearing group, but also reduce the wear of the bearing group, providing strong support for the flexible rotation of the ear plate shaft.

[0024] Embodiment 3: In order to facilitate the disassembly and maintenance of the bearing group 6 in the mounting port, the end cover 3 is an annular structure, and a fastening screw 2 threadedly connected to the bucket 1 is provided on the end cover 3. In order to improve the sealing performance of the end cover 3, a shaft sleeve a5 is provided between the inner ring surface of the end cover 3 and the ear plate shaft 7.

[0025] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A rotating structure of a grab bucket lug shaft, comprising a bucket portion (1), and a lug shaft (7) installed in a mounting opening of the bucket portion (1), characterized in that: An array of bearing groups (6) coaxially arranged with the installation opening and matched with the ear plate shaft (7) is arranged in the installation opening of the bucket portion (1), each bearing group (6) comprises at least two rolling bearings, and a spacer ring (9) and an expansion ring (10) coaxially arranged with the rolling bearings are arranged between two adjacent rolling bearings in each bearing group (6), the ear plate shaft (7) passes through the array of bearing groups (6) and is rotatably connected to the bucket portion (1), and end covers (3) for limiting and blocking the bearing groups (6) in the installation opening are detachably installed at both ends of the installation opening, and a waterproof felt (4) is arranged between the end covers (3) and the adjacent bearing groups (6).

2. The rotation structure of the grab bucket lug shaft according to claim 1, characterized in that: A shaft sleeve c (11) is provided between the inner wall of the mounting opening and the outer annular surface of the bearing assembly (6).

3. The rotation structure of the grab bucket lug shaft according to claim 1, characterized in that: The inner diameter of the spacer ring (9) is matched to the inner diameter of the inner ring of the rolling bearing, and the outer diameter of the spacer ring (9) is smaller than the outer diameter of the inner ring of the rolling bearing.

4. The rotation structure of the grab bucket lug shaft according to claim 3, characterized in that: The inner diameter of the expansion ring (10) is larger than the outer diameter of the inner ring of the rolling bearing, and the outer diameter of the expansion ring (10) is matched with the outer diameter of the outer ring of the rolling bearing.

5. The rotation structure of the grab bucket lug shaft according to claim 1, characterized in that: A shaft sleeve b (8) coaxially arranged with the mounting opening is provided between each adjacent bearing group (6), and the inner diameter of the shaft sleeve b (8) is matched with the inner diameter of the rolling bearing.

6. The rotating structure of the grab bucket lug shaft according to claim 1, characterized in that: The end cover (3) is an annular structure, and a shaft sleeve a (5) is provided between the inner annular surface of the end cover (3) and the ear plate shaft (7).

7. The rotation structure of the grab bucket lug shaft according to claim 6, characterized in that: The end cover (3) is provided with a fastening screw (2) threadedly connected to the bucket portion (1).

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