A wheeled crane frame structure, comprising a front section of the frame, a rear section of the frame and a slewing support, characterized in that: the rear section of the frame is an inverted trapezoid box-shaped structure, The width of the upper part is greater than the width of the lower part; the rear section of the frame is an integral structure, the slewing support is an upper support type slewing support, and the upper support slewing support is arranged at the top middle position of the rear section of the frame .
[Summary of technical implementation steps]
Frame structure of tire crane
The patented technology relates to the field of engineering machinery, in particular to a frame structure of a tire crane.
Technology Introduction
At present, the chassis structure of a wheeled crane is usually composed of front and rear fixed outriggers and front and rear sections of the frame. For example, the chassis structure of the frame of the wheeled crane shown in Figure 1 is an H-shaped outrigger structure, including the front section of the frame 1', the rear section of the frame 2', the front fixed outrigger 3', and the rear fixed outrigger. 4', swivel support 5'and movable support leg 6'. Figure 2 shows the chassis structure of the frame of the super large tonnage wheel crane. It is an X-shaped outrigger structure, including the front section of the frame 7', the rear section of the frame 8', the fixed outrigger 9'and the slewing support 10' , The rear section 8'of the frame is divided into two sections, which is a segmented structure, and the slewing support 10' is arranged between the rear sections 8'of the two sections of the frame. The rear section of the frame is the main force-bearing part of the crane during lifting operation or driving. The force is relatively large, and it is subject to high tipping moment, lifting load or driving shock load when driving in complex lifting operating environment and complex road conditions. As a result, the weaker parts of the rear section of the frame are prone to cracking, deformation and instability. Therefore, improving the bending and torsion resistance of the rear section of the frame is the key to improving the load-bearing capacity of the crane. The rear section of the frame in the prior art usually adopts a box-shaped structure composed of beams and plates. The cross-section of the box-shaped structure is generally rectangular. As shown in Figure 3, the bending moment of inertia and resistance of the rectangular frame itself The torsional moment of inertia is small, and there are the following problems. 1) The lightweight design of the rectangular frame has reached its limit. The increase in the load-bearing capacity of the product will inevitably increase the weight of the frame itself. With the continuous increase of the lifting weight of the crane, the bending moment and torque of the frame during the lifting operation are also increasing, and the structure with large cross-section is adopted. It can effectively improve the bending and torsion resistance of the frame, but the cross section of the body cannot be increased with the lifting weight due to driving restrictions. At the same time, the weight of the body must also meet the road conditions and driving conditions. The structural optimization design of the rectangular frame has reached The limit state cannot meet the requirements of increased load capacity. 2) The optimized structure of the strength and rigidity of the rectangular frame is basically finalized. The rectangular frame reduces weight or does not increase its own weight...
Frame structure of tire crane
【Technical protection point】
A wheeled crane frame structure, comprising a front section of the frame, a rear section of the frame and a slewing support, characterized in that: the rear section of the frame is an inverted trapezoid box-shaped structure, The width of the upper part is greater than the width of the lower part; the rear section of the frame is an integral structure, the slewing support is an upper support type slewing support, and the upper support slewing support is arranged at the top middle position of the rear section of the frame .
【Abstract of Technical Features】
1. A tire-type crane frame structure, comprising a front section of a frame, a rear section of the frame and a slewing support, characterized in that: the rear section of the frame is an inverted trapezoidal box-shaped structure, and the inverted trapezoidal box-shaped structure The width of the upper part of the structure is greater than the width of the lower part; the rear section of the frame is an integral structure, the slewing support is an upper support type slewing support, and the upper support slewing support is arranged on the top of the rear part of the frame In the middle position, the upper cover plate of the box-shaped structure is set in a segmented type, the upper support type slewing support is arranged between the two sections of the upper cover plate, and the upper support type slewing support is located above the frame as a whole , And the support-type slewing support is wider than the frame. 2. The frame structure of a rubber-tyred crane according to claim 1, characterized in that: the broken section of the rear section of the frame adopts a form of variable cross-section, and the height of the rear section of the frame is reduced to make the The cross-sectional area of the rear part of the rear part of the frame is smaller than the cross-sectional area of the front and middle parts of the rear part of the frame. 3. The tire-type crane frame structure according to claim 2, wherein the rear section of the frame is formed by splicing and welding of the upper cover plate, the lower floor plate, and the webs on both sides to form the inverted trapezoidal shape. Box structure. 4. The tire crane frame structure according to claim 2, wherein the rear section of the frame is welded to form the inverted trapezoid box shape through an upper cover plate and an integrally formed "U"-shaped bent plate. structure.
Post time: Nov-05-2021