Rear drive axle swing frame structure and loader

Abstract

The utility model discloses a rear drive axle swing frame structure and a loader, which are integrally of an integrated cast steel structure and comprise a middle connecting plate and two frame connecting plates. The middle connecting plate is provided with a large round through hole used for assembling a connecting shaft of the drive axle, a round boss I is arranged on the middle connecting plate around the large round through hole, a circle of bolt holes which are uniformly spaced are formed in the round boss I in the circumferential direction, and the round boss I and the drive axle are fixed together through a plurality of bolts; the two frame connecting plates are located at the two ends of the middle connecting plate respectively and used for being fixed to a frame. The upper surfaces of the two frame connecting plates and the upper surface of the middle connecting plate form an uneven cambered surface. According to the utility model, the structure of the swing frame is light, the local structure is optimized, and the overall structural strength and the shock resistance of the swing frame are improved.

Description

Technical Field

[0001] The utility model relates to a rear drive axle swing frame structure and belongs to the technical field of loaders. Background Art

[0002] The drive axle of an existing loader is generally designed as a swing structure, and the drive axle is connected to the frame through the swing frame, so that the drive axle can swing a certain angle relative to the frame to ensure the center of gravity stability and traction of the loader during driving. However, the swing frame designed currently is mostly produced by welding. Although it can meet the use requirements, the quality and cost of the workpiece are relatively high, and it is difficult to eliminate the welding and structural stress concentration. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides a rear drive axle swing frame structure, which can make the swing frame structure lightweight while optimizing the local structure to improve the overall structural strength and impact resistance of the swing frame.

[0004] The utility model is implemented according to the following technical solutions:

[0005] In a first aspect, the present invention provides a rear drive axle swing frame structure, which is an integrated cast steel structure as a whole, comprising:

[0006] The middle connecting plate is provided with a large round through hole for assembling the drive axle connecting shaft, and a circular boss I is provided on the middle connecting plate around the large round through hole, and a circle of bolt holes evenly spaced along the circumferential direction are provided on the circular boss I, which is fixed to the drive axle by a plurality of bolts;

[0007] Two frame connecting plates are respectively located at two ends of the middle connecting plate and are used to be fixed together with the frame; the two frame connecting plates and the upper surface of the middle connecting plate form an uneven arc surface.

[0008] In some embodiments, a sealing assembly is provided between the inner circumferential surface of the large circular through hole and the outer circumferential surface of the drive axle connecting shaft.

[0009] In some embodiments, a groove formed by a circular boss II and a circular boss III is provided at one end of the inner circumference of the large circular through hole, and an O-ring is installed in the groove; the O-ring and the circular boss II and circular boss III form a sealing assembly.

[0010] In some embodiments, a gasket is installed between the outer side surface of the circular boss IV on the inner circumference of the large circular through hole and the inner side surface of the circular boss V of the drive axle connecting shaft, and a bushing is installed between the gasket and the circular boss VI of the drive axle connecting shaft.

[0011] In some embodiments, the upper surface of the intermediate connecting plate is provided with an oil passage extending inward from the surface and communicating with the large circular through hole, and lubricant is injected into the drive axle connecting shaft through the oil passage.

[0012] In some embodiments, the intermediate connecting plate is further provided with a plurality of grooves for overall lightweighting.

[0013] In some embodiments, the frame connecting plate is a rectangular parallelepiped structure as a whole, and two frame connecting plates are symmetrically installed at both ends of the middle connecting plate; the frame connecting plate is provided with mounting holes and positioning pin holes for connecting to the frame.

[0014] In some embodiments, reinforcing ribs are fixed between the two ends of the lower surface of the middle connecting plate and the lower surfaces of the corresponding frame connecting plates.

[0015] In some embodiments, the connection between the upper surface of the middle connecting plate and the upper surface of the frame connecting plate and the connection between the lower surface of the middle connecting plate and the lower surface of the frame connecting plate are both transitionally connected by chamfering.

[0016] In a second aspect, the present invention provides a loader equipped with the above-mentioned rear drive axle swing frame structure.

[0017] Beneficial effects of the utility model:

[0018] The utility model can make the swing frame structure lightweight and optimize the local structure at the same time, thereby improving the overall structural strength and impact resistance of the swing frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation on the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0020] In the attached picture:

[0021] Figure 1 The rear drive axle swing frame structure of the utility model is schematically shown in FIG. Figure 1 ;

[0022] Figure 2 The rear drive axle swing frame structure of the utility model is schematically shown in FIG. Figure 2 ;

[0023] Figure 3 It is a partial enlarged view of the utility model.

[0024] Figure symbols: 1. middle connecting plate; 2. circular boss I; 3. frame connecting plate; 4. circular boss II; 5. circular boss III; 6. circular boss IV; 7. circular boss V; 8. oil channel; 9. groove; 10. mounting hole; 11. O-ring; 12. locating pin hole; 13. reinforcing rib; 14. bolt hole; 15. gasket; 16. bushing; 17. circular boss VI.

[0025] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. The following embodiments are used to illustrate the utility model but are not used to limit the scope of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] like Figure 1 , Figure 2 As shown, a rear drive axle swing frame structure is an integrated cast steel structure, including an intermediate connecting plate 1 and two frame connecting plates 3; the intermediate connecting plate 1 is provided with a large circular through hole for assembling the drive axle connecting shaft, and a circular boss Ⅰ2 is provided on the intermediate connecting plate 1 around the large circular through hole, and a circle of bolt holes 14 evenly spaced along the circumferential direction are provided on the circular boss Ⅰ2, which is fixed to the drive axle by multiple bolts; the two frame connecting plates 3 are respectively located at both ends of the intermediate connecting plate 1, and are used to be fixed to the frame; the two frame connecting plates 3 and the upper surface of the intermediate connecting plate 1 form an uneven arc surface.

[0030] Continuing with Figure 1, Figure 2 As shown, a sealing component is provided between the inner circumference of the large circular through hole and the outer circumference of the drive axle connecting shaft.

[0031] Further solutions, such as Figure 3 As shown, a groove formed by a circular boss II4 and a circular boss III5 is provided at one end of the inner circumference of the large circular through hole, and an O-ring 11 is installed in the groove; the O-ring 11 and the circular boss II4 and the circular boss III5 form a sealing assembly.

[0032] Further solutions, such as Figure 3 As shown, a gasket 15 is installed between the outer side surface of the circular boss IV6 on the inner circumferential surface of the large circular through hole and the inner side surface of the circular boss V7 of the drive axle connecting shaft, and a bushing 16 is installed between the gasket 15 and the circular boss VI17 of the drive axle connecting shaft.

[0033] Further solutions, such as Figure 1 As shown, the upper surface of the intermediate connecting plate 1 is provided with an oil passage 8 extending inward from the surface and communicating with the large circular through hole, and lubricant is injected into the drive axle connecting shaft through the oil passage 8 .

[0034] Further solutions, such as Figure 1 , Figure 2 As shown, the middle connecting plate 1 is also provided with a plurality of grooves 9 for overall lightness.

[0035] Further solutions, such as Figure 1 , Figure 2 As shown, the frame connecting plate 3 is a rectangular parallelepiped structure as a whole, and two frame connecting plates 3 are symmetrically installed at both ends of the middle connecting plate 1; the frame connecting plate 3 is provided with a mounting hole 10 and a positioning pin hole 12 for connecting to the frame.

[0036] Further solutions, such as Figure 1 , Figure 2 As shown, reinforcing ribs 13 are fixed between the two ends of the lower surface of the middle connecting plate 1 and the lower surface of the corresponding frame connecting plate 3 to increase the strength and rigidity of the connecting parts.

[0037] Further solutions, such as Figure 1 , Figure 2 As shown, the connection between the upper surface of the middle connecting plate 1 and the upper surface of the frame connecting plate 3 and the connection between the lower surface of the middle connecting plate 1 and the lower surface of the frame connecting plate 3 are both connected by chamfering to increase the impact resistance of the swing frame structure.

[0038] The utility model also provides a loader which is equipped with the above-mentioned rear drive axle swing frame structure.

[0039] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0040] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present utility model and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by the present application.

[0041] The above is only a preferred embodiment of the utility model, and does not limit the utility model in any form. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent can make some changes or modify the technical content suggested above into an equivalent embodiment with equivalent changes without departing from the scope of the technical solution of the utility model. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the utility model without departing from the content of the technical solution of the utility model still falls within the scope of the solution of the utility model.

Claims

1. A rear drive axle swing frame structure, characterized in that: The overall structure is a one-piece cast steel structure, including: The middle connecting plate is provided with a large round through hole for assembling the drive axle connecting shaft, and a circular boss I is provided on the middle connecting plate around the large round through hole, and a circle of bolt holes evenly spaced along the circumferential direction are provided on the circular boss I, which is fixed to the drive axle by a plurality of bolts; Two frame connecting plates are respectively located at two ends of the middle connecting plate and are used to be fixed together with the frame; the two frame connecting plates and the upper surface of the middle connecting plate form an uneven arc surface.

2. The rear drive axle swing frame structure according to claim 1, characterized in that: A sealing component is arranged between the inner circumference surface of the large circular through hole and the outer circumference surface of the driving axle connecting shaft.

3. The rear drive axle swing frame structure according to claim 2, characterized in that: A groove formed by a circular boss II and a circular boss III is provided at one end of the inner circumference of the large circular through hole, and an O-ring is installed in the groove; the O-ring and the circular boss II and the circular boss III form a sealing assembly.

4. The rear drive axle swing frame structure according to claim 2, characterized in that: A liner is installed between the outer side surface of the circular boss IV on the inner circumferential surface of the large circular through hole and the inner side surface of the circular boss V of the drive axle connecting shaft, and a bushing is installed between the liner and the circular boss VI of the drive axle connecting shaft.

5. The rear drive axle swing frame structure according to claim 1, characterized in that: The upper surface of the intermediate connecting plate is provided with an oil passage extending inwardly from the surface and communicating with the large circular through hole, and lubricant is injected into the drive axle connecting shaft through the oil passage.

6. The rear drive axle swing frame structure according to claim 1, characterized in that: The middle connecting plate is also provided with a plurality of grooves for overall lightweighting.

7. The rear drive axle swing frame structure according to claim 1, characterized in that: The frame connecting plate is a rectangular parallelepiped structure as a whole, and two frame connecting plates are symmetrically installed at two ends of the middle connecting plate; the frame connecting plate is provided with mounting holes and positioning pin holes for connecting the frame.

8. The rear drive axle swing frame structure according to claim 1, characterized in that: Reinforcing ribs are fixed between the two ends of the lower surface of the middle connecting plate and the lower surfaces of the corresponding frame connecting plates.

9. The rear drive axle swing frame structure according to claim 1, characterized in that: The connection between the upper surface of the middle connecting plate and the upper surface of the frame connecting plate and the connection between the lower surface of the middle connecting plate and the lower surface of the frame connecting plate are both transitionally connected in a rounded manner.

10. A loader, characterized in that: A rear drive axle swing frame structure as claimed in any one of claims 1 to 9 is installed.

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