Hinge structure of loading machine

Abstract

The utility model provides a hinge structure of a loader, which relates to the technical field of engineering machinery, and comprises a front frame, a rear frame and a hinge assembly connecting the front frame and the rear frame, the hinge assembly comprises an upper hinge shaft, an upper bushing, a tapered roller bearing, a lower bushing, an upper hinge upper cover, an upper hinge lower cover, an upper oil seal and a lower oil seal; coaxial hinge holes are formed in the front frame and the rear frame, and the upper hinge shaft is arranged in the coaxial hinge holes in a penetrating manner; the upper and lower ends of the tapered roller bearing are respectively provided with an upper oil seal and a lower oil seal. The hinge holes of the front frame and the rear frame are coaxially arranged and connected through an upper hinge shaft; the tapered roller bearing is mounted in a hinge hole of the front frame, an outer ring is fixed by an end cover, and an inner ring is pressed by a positioning sleeve; oil seals are arranged at the upper and lower ends of the bearing to prevent lubricating oil from leaking and foreign matters from entering. By optimizing the bearing positioning and sealing design, the stability of the hinge structure is improved, and the service life of the hinge structure is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of engineering machinery technology, specifically to an articulated structure for a loader. Background Technology

[0002] The statements in this section are merely background information relating to this disclosure and do not necessarily constitute prior art.

[0003] As a core piece of construction machinery, the loader's articulated structure connects the front and rear frames, allowing them to rotate relative to each other for steering. In existing technology, articulated structures often use bushings or ordinary bearings for connection, which presents the following problems:

[0004] (1) Insufficient axial positioning: Traditional structures lack effective axial limiting design, which makes the hinge shaft prone to movement under long-term load, causing bolts to loosen or even break.

[0005] (2) Poor sealing: Without a reliable oil seal structure, external dust, gravel and other foreign objects can easily enter the hinge area, aggravating component wear. At the same time, lubricating grease is prone to leakage, reducing the reliability of the hinge structure.

[0006] (3) Low structural stability: The traditional articulated shaft and the frame have a simple connection method, which makes it difficult to withstand radial and axial loads under complex working conditions, resulting in a short service life. Utility Model Content

[0007] The purpose of this invention is to provide an articulated structure for a loader, which achieves a stable connection between the front and rear frames through optimized structural design, and prevents lubricating oil leakage and foreign object intrusion through a sealing structure, thereby improving the service life of the articulated structure.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A hinged structure for a loader includes a front frame (8), a rear frame (9), and a hinge assembly connecting the two. The hinge assembly includes an upper hinge shaft (1), an upper bushing (2), a tapered roller bearing (7), a lower bushing (5), an upper hinge cover (4), an upper hinge cover (6), an upper oil seal (3), and a lower oil seal (10). The front frame (8) and the rear frame (9) are provided with coaxial hinge holes, and the upper hinge shaft (1) passes through the coaxial hinge holes.

[0010] The tapered roller bearing (7) is provided with an upper oil seal (3) and a lower oil seal (10) at its upper and lower ends respectively. The upper oil seal (3) is located at the upper end of the tapered roller bearing (7), and the inner wall of the upper oil seal (3) is in contact with the outer wall of the upper bushing (2). The lower oil seal (10) is located at the lower end of the tapered roller bearing (7), and the inner wall of the lower oil seal (10) is in contact with the upper outer wall of the lower bushing (5).

[0011] Furthermore, the tapered roller bearing (7) is installed in the hinge hole of the front frame (8), and the outer ring of the tapered roller bearing (7) is in contact with the end face of the hinge hole of the front frame (8).

[0012] Furthermore, the upper hinge shaft (1) passes through the inner ring of the tapered roller bearing (7), the top end of the upper hinge shaft (1) is fixedly connected to the upper plate of the rear frame (9) by bolts, and the bottom end of the upper hinge shaft (1) is fixedly connected to the lower plate of the rear frame (9) by bolts.

[0013] Furthermore, the upper hinged cover (4) and the lower hinged cover (6) cooperate to form an axial limiting structure for the upper hinged shaft (1).

[0014] Furthermore, the axial limiting structure includes: an upper hinged cover (4) located on the upper side of the hinge hole of the front frame (8) and fixedly connected to the front frame (8) by bolts; and an upper hinged lower cover (6) located on the lower side of the hinge hole of the rear frame (9) and fixedly connected to the rear frame (9) by bolts.

[0015] Furthermore, the upper bushing (2) and the lower bushing (5) are respectively fitted onto the upper and lower parts of the upper hinge shaft (1). The upper end of the upper bushing (2) is in contact with the lower wall of the upper plate of the rear frame (9), and the lower outer wall of the lower bushing (5) is in contact with the inner wall of the lower plate of the rear frame (9).

[0016] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0017] (1) The hinge structure provided by this utility model improves the axial stability of the loader. By cooperating with the upper and lower covers of the upper hinge, the axial displacement of the hinge shaft is limited, and loosening is prevented.

[0018] (2) The hinge structure for loaders provided by this utility model has enhanced sealing performance, and the double oil seal design effectively blocks external foreign objects and prevents lubricating grease leakage, thus extending bearing life.

[0019] (3) The load distribution optimization of the articulated structure for loaders provided by this utility model, with the combination design of tapered roller bearings and bushings, can withstand radial and axial loads at the same time and adapt to complex working conditions. Attached Figure Description

[0020] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments of this utility model and their descriptions are used to explain this utility model and do not constitute an improper limitation of this utility model.

[0021] Figure 1 A three-dimensional schematic diagram of the hinge structure provided by this utility model;

[0022] Figure 2 Cross-sectional view of the hinge structure provided by this utility model Figure 1 ;

[0023] Figure 3 Cross-sectional view of the hinge structure provided by this utility model Figure 2 ;

[0024] In the diagram, 1. Upper hinge shaft; 2. Upper bushing; 3. Upper oil seal; 4. Upper hinge cover; 5. Lower bushing; 6. Upper hinge cover; 7. Tapered roller bearing; 8. Front frame; 9. Rear frame; 10. Lower oil seal. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] Example 1

[0030] like Figure 1-3As shown, a hinge structure for a loader includes a front frame (8), a rear frame (9), and a hinge assembly connecting the two. The hinge assembly includes an upper hinge shaft (1), an upper bushing (2), a tapered roller bearing (7), a lower bushing (5), an upper hinge cover (4), an upper hinge cover (6), an upper oil seal (3), and a lower oil seal (10). The front frame (8) and the rear frame (9) are provided with coaxial hinge holes, and the upper hinge shaft (1) passes through the coaxial hinge holes.

[0031] The tapered roller bearing (7) is provided with an upper oil seal (3) and a lower oil seal (10) at its upper and lower ends respectively. The upper oil seal (3) is located at the upper end of the tapered roller bearing (7), and the inner wall of the upper oil seal (3) is in contact with the outer wall of the upper bushing (2). The lower oil seal (10) is located at the lower end of the tapered roller bearing (7), and the inner wall of the lower oil seal (10) is in contact with the upper outer wall of the lower bushing (5).

[0032] Specifically, the tapered roller bearing (7) is installed in the hinge hole of the front frame (8), the outer ring of the tapered roller bearing (7) is in contact with the end face of the hinge hole of the front frame (8), and the outer ring of the tapered roller bearing (7) is pressed by the upper hinge cover (4).

[0033] Specifically, the upper hinge shaft (1) passes through the inner ring of the tapered roller bearing (7), the top end of the upper hinge shaft (1) is fixedly connected to the upper plate of the rear frame (9) by bolts, the bottom end of the upper hinge shaft (1) is fixedly connected to the lower plate of the rear frame (9) by bolts, and the inner ring of the tapered roller bearing (7) is pressed by the upper bushing (2) and the lower bushing (5).

[0034] Specifically, the upper hinge cover (4) and the lower hinge cover (6) cooperate to form an axial limiting structure for the upper hinge shaft (1). The axial limiting structure includes: the upper hinge cover (4) is located above the hinge hole of the front frame (8) and is fixedly connected to the front frame (8) by bolts; the lower hinge cover (6) is located below the hinge hole of the rear frame (9) and is fixedly connected to the rear frame (9) by bolts.

[0035] Specifically, the upper bushing (2) and the lower bushing (5) are respectively fitted onto the upper and lower parts of the upper hinge shaft (1). The upper end of the upper bushing (2) is in contact with the lower wall of the upper plate of the rear frame (9), and the lower outer wall of the lower bushing (5) is in contact with the inner wall of the lower plate of the rear frame (9).

[0036] The working principle of this utility model is as follows:

[0037] When the loader turns, the front frame (8) and the rear frame (9) rotate relative to each other around the upper hinge shaft (1). The radial load is borne by the tapered roller bearing (7), and the axial load is distributed to the frame through the upper bushing (2) and the lower bushing (5). The upper oil seal (3) and the lower oil seal (10) prevent external sand and gravel from entering the bearing area and prevent internal grease leakage. The bolt fixing structure of the upper hinge cover (4) and the lower hinge cover (6) prevents the hinge shaft from moving and ensures the connection rigidity during long-term use.

[0038] In the description of this specification, the terms "connection", "installation", "fixing", "setting", etc. are interpreted in a broad sense. For example, "connection" can be a fixed connection or an indirect connection through an intermediate component without affecting the relationship between components and the technical effect. It can also be an integral connection or a partial connection. In such cases, those skilled in the art can understand the specific meaning of the above terms in this utility model or utility model according to the specific circumstances.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. Articulated structure of a loader, comprising a front frame (8), a rear frame (9) and an articulation assembly connecting the two, characterized in that, The hinge assembly includes an upper hinge shaft (1), an upper bushing (2), a tapered roller bearing (7), a lower bushing (5), an upper hinge cover (4), an upper hinge cover (6), an upper oil seal (3), and a lower oil seal (10); the front frame (8) and the rear frame (9) are provided with coaxial hinge holes, and the upper hinge shaft (1) passes through the coaxial hinge holes; The tapered roller bearing (7) is provided with an upper oil seal (3) and a lower oil seal (10) at its upper and lower ends respectively. The upper oil seal (3) is located at the upper end of the tapered roller bearing (7), and the inner wall of the upper oil seal (3) is in contact with the outer wall of the upper bushing (2). The lower oil seal (10) is located at the lower end of the tapered roller bearing (7), and the inner wall of the lower oil seal (10) is in contact with the upper outer wall of the lower bushing (5).

2. The articulated structure of a loader as set forth in claim 1, wherein, The tapered roller bearing (7) is installed in the hinge hole of the front frame (8), and the outer ring of the tapered roller bearing (7) is in contact with the end face of the hinge hole of the front frame (8).

3. The articulated structure of a loader as set forth in claim 2, wherein, The upper hinge shaft (1) passes through the inner ring of the tapered roller bearing (7). The top end of the upper hinge shaft (1) is fixedly connected to the upper plate of the rear frame (9) by bolts, and the bottom end of the upper hinge shaft (1) is fixedly connected to the lower plate of the rear frame (9) by bolts.

4. The articulated structure of a loader as set forth in claim 1, wherein, The upper hinged cover (4) and the lower hinged cover (6) cooperate to form an axial limiting structure for the upper hinged shaft (1).

5. The articulated structure of a loader as set forth in claim 4, wherein, The axial limiting structure includes: an upper hinged cover (4) located on the upper side of the hinge hole of the front frame (8) and fixedly connected to the front frame (8) by bolts; and an upper hinged lower cover (6) located on the lower side of the hinge hole of the rear frame (9) and fixedly connected to the rear frame (9) by bolts.

6. The articulated structure of a loader as claimed in claim 1, characterized in that, The upper bushing (2) and the lower bushing (5) are respectively fitted on the upper and lower parts of the upper hinge shaft (1). The upper end of the upper bushing (2) is in contact with the lower wall of the upper plate of the rear frame (9), and the lower outer wall of the lower bushing (5) is in contact with the inner wall of the lower plate of the rear frame (9).

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