CN-116750089-B - Auxiliary frame and engineering machinery

CN116750089BCN 116750089 BCN116750089 BCN 116750089BCN-116750089-B

Abstract

The invention belongs to the technical field of universal chassis cranes, and particularly relates to an auxiliary frame and engineering machinery. The auxiliary frame comprises an auxiliary frame main body and an auxiliary frame bottom beam, wherein the auxiliary frame bottom beam is connected with a chassis girder of engineering machinery positioned below, the shape of the upper part of the auxiliary frame bottom beam is matched with that of the lower end face of the auxiliary frame main body, the auxiliary frame bottom beam is connected with the auxiliary frame main body positioned above, and the width of the auxiliary frame bottom beam is smaller than that of the auxiliary frame main body. The invention solves the problems of difficult overall space arrangement, limited section width of the auxiliary frame main body and limited flatness of the bottom plate of the auxiliary frame main body of the general chassis crane caused by direct connection of the auxiliary frame main body and the general chassis.

Inventors

CHENG YIQUAN
ZHANG XIAOGUANG
ZHOU NAN
HAN YUXI
JIA XIAOJIE

Assignees

徐州重型机械有限公司

Dates

Publication Date: 20260505
Application Date: 20230630

Claims (9)

1. The auxiliary frame comprises an auxiliary frame main body and is characterized by further comprising an auxiliary frame bottom beam; The shape of the upper part of the auxiliary frame bottom beam is matched with the shape of the lower end face of the auxiliary frame main body, the auxiliary frame bottom beam is connected with the auxiliary frame main body positioned above, and the width of the auxiliary frame bottom beam is smaller than that of the auxiliary frame main body; the auxiliary frame bottom beam comprises two bottom beam bottom plates, a plurality of transverse partition plates, a plurality of longitudinal partition plates, two bottom beam webs and a plurality of bottom beam sealing plates; the bottom beam webs are arranged along the length direction of a chassis girder of the engineering machinery, the two bottom beam webs are parallel to each other, two ends of the two bottom beam webs are welded with the bottom beam sealing plates, and the lower ends of the two bottom beam webs are welded with the bottom beam plate; the transverse partition plates are arranged at intervals and are parallel to each other, two ends of the transverse partition plates are respectively welded with two bottom beam webs, the transverse partition plates are perpendicular to the bottom beam webs, and the lower ends of the transverse partition plates are welded with the bottom beam bottom plate; the longitudinal partition plates are parallel to the bottom beam webs, are positioned between the two bottom beam webs, are welded with the bottom beam bottom plate at the lower end, are arranged at intervals, are welded with the diaphragm plates at one side, and are welded with the bottom beam sealing plates or the diaphragm plates at the other side; bottom beam sealing plate lower end welding a bottom beam and a bottom plate; The two bottom beam bottom plates are positioned on the same horizontal plane.
2. A subframe according to claim 1 wherein said subframe bottom rail is welded from a plurality of straight panels.
3. The subframe of claim 1 wherein said cross, longitudinal and sill cover plates are provided with lightening apertures.
4. A subframe according to claim 1 wherein said subframe bottom rail and said subframe body lower end face form a box-like structure.
5. The subframe of claim 1 wherein said subframe bottom rail is welded from one or more of straight plates, bent plates, channel steel, rectangular tubes.
6. A subframe according to claim 1, further comprising a connection plate (7); The bottom beam web (54) is provided with a plurality of bolt holes; The connecting plate (7) is provided with a plurality of bolt holes, the upper part of the connecting plate is connected with the bottom beam web (54) through bolts, and the lower part of the connecting plate is connected with the chassis girder of the engineering machinery through bolts.
7. A subframe according to claim 1 wherein the subframe base beam is welded or riveted to the subframe body.
8. A subframe according to claim 1, wherein the base plate of the subframe body is welded from straight or curved plates of different thickness.
9. A construction machine comprising a subframe according to any one of claims 1-8.

Description

Auxiliary frame and engineering machinery Technical Field The invention belongs to the technical field of universal chassis cranes, and particularly relates to an auxiliary frame and engineering machinery. Background The universal chassis crane is not only a highway driving vehicle, but also a hoisting tool. The auxiliary frame is a main stressed part in the vehicle hoisting operation, and simultaneously, the auxiliary frame is used as a mounting foundation of the whole general chassis crane to support and connect the general chassis and the relevant parts of all the assemblies of the crane, and ensure that the general chassis and the crane can maintain enough arrangement space and correct relative positions. Therefore, the auxiliary frame structure firstly meets the overall arrangement requirement of the whole vehicle, and especially when the auxiliary frame structure is larger than the universal chassis Liang Pi, the structural design is reasonable, and the installation convenience is good. Secondly, the auxiliary frame also bears various static and dynamic loads from the crane operation on the crane and the ground, and particularly, the auxiliary frame has enough strength and rigidity during the crane operation, so that the damage caused by overlarge load is avoided. In installation, driving and operation, the sub vehicle frame has reasonable structure, under the prerequisite of guaranteeing to match with general chassis girder, makes the sub vehicle frame cross-section have reasonable design size, makes sub vehicle frame sufficient intensity and rigidity, and it is to the matching with general chassis, complete machine normal work and safe driving to improve with general chassis matching installation, to improving sub vehicle frame atress condition, lighten general chassis hoist dead weight, promote complete machine installation convenience, promote complete machine performance, improve the reliability of general chassis hoist all have important meaning. In the prior art, as shown in fig. 1 (a) and 1 (b), the bottom plate of the subframe 1 'is directly connected with the universal chassis girder 2', and is connected with the chassis girder 2 'through a connecting piece 3'. In addition, from the space analysis of the subframe and the arrangement of installation components thereof, in order to ensure the installation convenience, the problems of interference with accessories on universal chassis tires and universal chassis girders and the like are avoided, and the cross section width of the subframe is designed to be the same as the width of the universal chassis girders at maximum, so that when the high hoisting performance requirement is met, the cross section height of the subframe can only be increased in a rotating way, and further, the structural parts are easy to generate rigidity deficiency, and the problem that the overall height of the universal chassis crane exceeds the standard regulation limit value and the like is caused by the requirement of increasing the weight of the subframe for meeting the rigidity requirement. Therefore, the conventional subframe has the problems that the assembly universality is poor, the section width of the subframe cannot be widened, the frame bottom plate cannot be butted by adopting a thin and thick plate, and the lifting performance is limited under the same weight because the conventional subframe is connected with a universal chassis. Disclosure of Invention In order to solve the defects of the prior art, the invention provides the auxiliary frame and the engineering machinery, and solves the problems of difficult overall space arrangement, poor assembly universality, limited section width of the auxiliary frame main body and limited flatness of the bottom plate of the auxiliary frame main body of the general chassis crane caused by direct connection of the auxiliary frame main body and the general chassis. In order to solve the defects in the prior art, the technical scheme provided by the invention is as follows: an auxiliary frame comprises an auxiliary frame main body and an auxiliary frame bottom beam; The upper shape of the auxiliary frame bottom beam is matched with the shape of the lower end face of the auxiliary frame main body, the auxiliary frame bottom beam is connected with the auxiliary frame main body positioned above, and the width of the auxiliary frame bottom beam is smaller than that of the auxiliary frame main body. Preferably, the auxiliary frame bottom beam is formed by welding a plurality of straight plates. Preferably, the auxiliary frame bottom beam comprises two bottom beam bottom plates, a plurality of transverse partition plates, a plurality of longitudinal partition plates, two bottom beam webs and a plurality of bottom beam sealing plates; the bottom beam webs are arranged along the length direction of a chassis girder of the engineering machinery, the two bottom beam webs are parallel to each other, two ends of the two bottom be