Composite box type frame structure

Abstract

The utility model relates to the technical field of loaders, in particular to a composite box type frame structure which comprises a frame body, the frame body comprises frame bodies on the two sides and a front cover plate, the frame bodies on the two sides are connected with a frame connecting auxiliary plate assembly respectively, and the frame connecting auxiliary plate assembly comprises a bottom side connecting plate and a connecting vertical plate. The inner sides and the outer sides of the connecting vertical plates are connected with the front cover plate and the frame body respectively so that a double-layer reinforcing structure can be formed at the connecting position, a reinforcing bent part is arranged at the lower end of the front cover plate, the rear side of the reinforcing bent part is connected with a bent plate, and the two ends of the bent plate are connected with the connecting vertical plates on the two sides respectively. A double-layer welding design structure is adopted in the connecting position, a box body reinforcing structure is formed, the connecting strength and the torsion resistance of the front axle mounting position are greatly improved, and therefore the problem of the strength of a vehicle frame of a loading machine under the limiting working condition is well solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of loaders, and particularly relates to a composite box-type frame structure. Background Art

[0002] The front frame is an important load-bearing component of the loader. The front side is connected to the front drive axle and the working device, and the rear side is hinged to the rear frame. Under extreme working conditions, especially when the loader is digging up materials or even the rear wheels are off the ground, the weight of the entire loader will be transferred to the front frame through the front axle, which can easily cause the frame to crack, especially at the connection between the frame and the drive axle.

[0003] The current frame structure is as follows Figure 4 As shown, in this structure, the two sides of the front cover are welded to the frame body, resulting in weak strength at the joints and obvious stress concentration at the welding positions. The force transmitted to the frame by the drive axle cannot be completely absorbed by the frame, which can easily cause frame cracking when the vehicle is overloaded. Utility Model Content

[0004] The utility model provides a composite box-type frame structure, which can solve the problems pointed out in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: including a frame body, the frame body including frame bodies and a front cover plate on both sides, the frame bodies on both sides are respectively connected to the frame connecting sub-plate components, the frame connecting sub-plate components include a bottom connecting plate and a connecting vertical plate, the inner and outer sides of the connecting vertical plate are respectively connected to the front cover plate and the frame body, so that a double-layer reinforced structure is formed at the connection.

[0006] Preferably, the lower end of the front cover plate has a reinforced bending portion.

[0007] Preferably, the rear side of the reinforced bent portion is connected to a bent plate, both ends of the bent plate are connected to connecting vertical plates on both sides respectively, and the lower end thereof is connected to the bottom connecting plate to form a reinforced box structure.

[0008] Preferably, the connecting vertical plate is provided with a plurality of plug welding holes.

[0009] Preferably, the frame connecting sub-plate assembly is connected with a plurality of reinforcing rib plates.

[0010] Beneficial effects: The utility model provides a composite box-type frame structure, which adopts a double-layer welding design structure at the connection between the frame body and the front cover plate, and at the same time, a bent plate is arranged inside to form a box reinforcement structure, which greatly improves the connection strength and torsion resistance of the front axle installation, thereby effectively solving the strength problem of the loader frame under extreme working conditions and the frame fatigue cracking problem caused by the increase in the use time of the loader. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a split schematic diagram of the utility model;

[0013] Figure 3 It is an internal schematic diagram of the utility model;

[0014] Figure 4 The following is the structural diagram of the existing vehicle frame;

[0015] Description of reference numerals:

[0016] Reference numerals in the figure: frame body 1; front cover plate 2; reinforced bent portion 21; frame connecting sub-plate assembly 3; bottom side connecting plate 31; connecting vertical plate 32; plug welding hole 33; bent plate 4; reinforcing rib plate 5. DETAILED DESCRIPTION

[0017] A specific implementation mode of the present utility model is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific implementation mode.

[0018] Embodiment 1:

[0019] like Figure 1-3 A composite box-type frame structure comprises a frame body, the frame body comprises a frame body 1 and a front cover plate 2 on both sides, the frame bodies 1 on both sides are respectively connected to a frame connecting sub-plate assembly 3, the frame connecting sub-plate assembly 3 comprises a bottom connecting plate 31 and a connecting vertical plate 32, the inner and outer sides of the connecting vertical plate 32 are respectively connected to the front cover plate 2 and the frame body 1, so that a double-layer reinforcement structure is formed at the connection, specifically, the front outer edge of the connecting vertical plate is connected to the front cover, and the outer sides of the connecting vertical plates (32) on both sides are respectively connected to the frame bodies (1) on both sides; the above connections are all welded, and through this structure, a double-layer connection structure of the connecting vertical plate 32 and the frame body 1 can be formed at the connection to increase the connection strength and torsional resistance here.

[0020] In some embodiments, in particular Figure 2 As shown, the lower end of the front cover plate 2 has a reinforced bent portion 21. Compared with a traditional straight front cover plate, the provision of the reinforced bent portion 21 can improve the strength of this portion to a certain extent.

[0021] In some embodiments, in particular Figure 3As shown, the rear side of the reinforced bent portion 21 is connected to a bent plate 4, both ends of the bent plate 4 are connected to connecting vertical plates 32 on both sides respectively, and the lower end thereof is connected to the bottom connecting plate 31 to form a reinforced box structure, that is, a reinforced box structure is formed between the bent plate 4, the frame bodies 1 on both sides and the frame connecting sub-plate assembly 3. The box structure improves the connection strength and at the same time avoids the concentrated force on the frame body 1 at this position to the greatest extent, so that the force transmitted to the frame body 1 by the front axle can be effectively dispersed throughout the frame body 1, thereby greatly enhancing the reliability of the loader under extreme working conditions.

[0022] In some embodiments, a plurality of plug welding holes 33 are provided on the connecting vertical plate 32, and the plug welding holes 33 are used to reinforce the welding with the inner side surface of the frame body 1. The frame connecting sub-plate assembly 3 is connected with a plurality of reinforcing rib plates 5, which play the role of connection reinforcement to improve the impact strength of the connection.

[0023] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A composite box-type frame structure, comprising a frame body, wherein the frame body comprises frame bodies (1) on both sides and a front cover plate (2), characterized in that: The frame bodies (1) on both sides are respectively connected to the frame connecting sub-plate assembly (3), and the frame connecting sub-plate assembly (3) comprises a bottom connecting plate (31) and a connecting vertical plate (32), and the inner and outer sides of the connecting vertical plate (32) are respectively connected to the front cover plate (2) and the frame body (1), so that a double-layer reinforcement structure is formed at the connection.

2. The composite box-type frame structure according to claim 1, characterized in that: The lower end of the front cover plate (2) has a reinforced bent portion (21).

3. A composite box-type frame structure according to claim 2, characterized in that: The rear side of the reinforced bent portion (21) is connected to a bent plate (4), both ends of the bent plate (4) are connected to connecting vertical plates (32) on both sides respectively, and the lower end is connected to the bottom connecting plate (31) to form a reinforced box structure.

4. The composite box-type frame structure according to claim 3, characterized in that: The connecting vertical plate (32) is provided with a plurality of plug welding holes (33).

5. A composite box-type frame structure according to any one of claims 1 to 4, characterized in that: The vehicle frame connecting sub-plate assembly (3) is connected to a plurality of reinforcing rib plates (5).

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