Frame with high bending and torsional rigidity suitable for heavy off-road vehicle

Abstract

The utility model relates to a high-bending and high-torsional-rigidity frame suitable for a heavy off-road vehicle, and solves the problems that an upper part bears bending and torsional loads due to large bending and torsional deformation of an existing heavy-duty vehicle frame, the upper part loses efficacy in advance, and the overall reliability of equipment is low. Comprising a left-side rectangular longitudinal beam, a right-side rectangular longitudinal beam and a cross beam, the rectangular longitudinal beam is formed by butt welding an inner-side C-shaped longitudinal beam and an outer-side C-shaped longitudinal beam, hole sites for installing vehicle frame accessories are formed in the longitudinal beams, bolt spacer bushes are welded between the inner-side C-shaped longitudinal beam and the outer-side C-shaped longitudinal beam, and the cross beam is connected between the left-side rectangular longitudinal beam and the right-side rectangular longitudinal beam. The cross section form or structure of the cross beam is correspondingly designed according to the load borne by the chassis, and the cross beam specifically comprises a tubular beam, an I-shaped beam, a C-shaped beam, a K-shaped beam or a special-shaped beam. According to the structural form adopted by the utility model, the deformation of the frame when the vehicle runs under the off-road working condition is reduced, the additional load caused by the deformation of the frame is reduced, and a more reliable structural form which better conforms to the off-road working condition is realized.

Description

Technical Field

[0001] The utility model relates to a frame of a heavy-duty off-road vehicle, in particular to a frame with high bending and torsional rigidity suitable for the heavy-duty off-road vehicle. Background Art

[0002] Many vehicle-mounted equipment are fixed on the chassis frame of heavy-duty off-road vehicles. Currently, heavy-duty vehicle frames adopt a structure in which two or more C-shaped longitudinal beams are stacked in the same direction. The C-shaped longitudinal beams are made by rolling or stamping plates. Although the processing and manufacturing are convenient and the installation process of frame accessories is good, the bending and torsional stiffness of the frame is small. When the vehicle is traveling on off-road roads, the bending and torsional deformation of the frame is large, causing the upper part to bear bending and torsional loads, resulting in premature failure of the upper part and low overall reliability of the equipment. Utility Model Content

[0003] The purpose of the utility model is to change the C-shaped longitudinal beam structure into a rectangular longitudinal beam structure, increase the bending and torsional section coefficients on the basis of keeping the longitudinal beam thickness unchanged, improve the bending and torsional rigidity of the frame, and reduce the additional load on the frame borne by the upper body.

[0004] The utility model is realized by the following technical solutions:

[0005] A frame with high bending and torsional stiffness suitable for heavy-duty off-road vehicles comprises a left rectangular longitudinal beam, a right rectangular longitudinal beam and a cross beam. The rectangular longitudinal beam is formed by butt-welding an inner C-shaped longitudinal beam and an outer C-shaped longitudinal beam. Holes for mounting frame accessories are provided on the longitudinal beam. Bolt spacers are welded between the inner C-shaped longitudinal beam and the outer C-shaped longitudinal beam. The cross beam is connected between the left rectangular longitudinal beam and the right rectangular longitudinal beam.

[0006] The cross-sectional form or structure of the crossbeam is designed accordingly according to the load borne by the chassis. The specific structures are: tubular beam, I-beam, C-beam, K-beam or special-shaped beam.

[0007] The structural form adopted by the utility model reduces the deformation of the vehicle frame when the vehicle is traveling in off-road conditions, reduces the additional load on the upper body caused by the deformation of the frame, and realizes a structural mode that is more suitable for off-road conditions and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of the structure of the utility model;

[0009] Figure 2 It is a schematic diagram of the components of the utility model. DETAILED DESCRIPTION

[0010] The utility model adopts two C-shaped beams welded together to clamp several sections of tubular and trough-shaped crossbeams to form a rectangular longitudinal beam frame structure. The holes for installing frame accessories on the longitudinal beams are welded with spacers to increase the strength of bolt fixing.

[0011] See Figure 1 、 Figure 2 The utility model is primarily composed of a left rectangular longitudinal beam ①, a right rectangular longitudinal beam ②, and a cross beam ③. The rectangular longitudinal beam is butt-welded from an inner C-shaped longitudinal beam ④ and an outer C-shaped longitudinal beam ⑤. Holes for mounting frame accessories are provided on the longitudinal beams. Bolt spacers ⑥ are welded between the inner and outer C-shaped longitudinal beams ④ and ⑤ to enhance bolt fastening strength.

[0012] The cross-sectional form or structure of the frame crossbeam can be designed accordingly according to the load borne by the chassis. The specific structure can be: tubular beam, I-beam, C-beam, K-beam, special-shaped beam, etc.

[0013] The utility model replaces the vehicle frame generally formed by superimposing two or more C-shaped longitudinal beams in the same direction. By butt-welding the two C-shaped longitudinal beams, a rectangular longitudinal beam structure is formed, so that the bending rigidity and torsional rigidity of the vehicle frame are increased while the thickness of the longitudinal beams is not increased in the vehicle frame assembly.

Claims

1. A frame with high bending and torsional stiffness suitable for heavy off-road vehicles, comprising a left rectangular longitudinal beam, a right rectangular longitudinal beam, and a cross beam, characterized by: The rectangular longitudinal beam is formed by butt-welding the inner C-shaped longitudinal beam and the outer C-shaped longitudinal beam. Holes for installing frame accessories are opened on the longitudinal beam. Bolt spacers are welded between the inner C-shaped longitudinal beam and the outer C-shaped longitudinal beam. The crossbeam is connected between the left rectangular longitudinal beam and the right rectangular longitudinal beam.

2. A frame with high bending and torsional stiffness suitable for heavy off-road vehicles according to claim 1, characterized in that: The cross-sectional form or structure of the crossbeam is designed accordingly according to the load borne by the chassis. The specific structures are: tubular beam, I-beam, C-beam, K-beam or special-shaped beam.

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