Commercial car bottom end rail
Technical Field
The utility model relates to the technical field of automobile parts, in particular to a lower cross beam of a commercial vehicle.
Background
The chassis is an important component of the automobile and generally consists of a transmission system, a running system, a steering system and a braking system. The main functions of the chassis include supporting and installing an automobile engine and parts and assemblies thereof to form an integral model of the automobile, bear the power of the engine and ensure the normal running of the automobile.
The running system mainly comprises a frame, an axle, wheels, a suspension and the like. The frame supports and connects the various assemblies of the vehicle, ensures that they are in a relatively correct position and is subject to various loads inside and outside the vehicle. The wheels support the whole weight of the automobile, reduce and absorb the vibration and impact force during running, and prevent the automobile parts from being damaged. The suspension is responsible for transmitting the moment between the wheels and the frame, so that the running stability and the running comfort of the automobile are ensured.
At present, in the field of commercial vehicles, in particular to heavy commercial vehicles, the requirements on the strength and torsional rigidity of a front suspension part of a frame are higher, and in order to strengthen the front end strength of the frame and ensure the safety of the whole vehicle, the front suspension part is usually realized in a mode of adding a cross beam (namely a lower cross beam). In the prior art, the cross beam mainly adopts a tubular bent beam or a cross beam in a shape like a Chinese character 'ji'. When the cross beam is actually used, the cross beam has the following defects that 1, if the intercooler protective plate is required to be installed on the tubular bent beam, an installation bracket is required to be welded on the bent beam main body, the structure is complex, the manufacturing cost is increased, the economic benefit is low, and 2, the transverse space occupied by the cross beam in a shape like a Chinese character 'ji' is too large, the cross beam is easy to interfere with the engine oil pan, and the assembly difficulty is increased.
Disclosure of utility model
The utility model aims to overcome the defects of complex structure and large occupied space in the prior art, and provides the lower cross beam of the commercial vehicle, which has the advantages of reasonable design, simple structure, small occupied transverse space, low manufacturing cost, benefit for avoiding the oil pan and suitability for popularization.
The lower cross beam of the commercial vehicle comprises a cross beam main body and cross beam supports, wherein the cross beam supports are respectively arranged at two ends of the cross beam main body and symmetrically arranged, eccentric mounting holes are formed in the cross beam supports, the end parts of the cross beam main body are inserted into the eccentric mounting holes so as to be connected with the cross beam supports, the two cross beam supports are connected with plate spring supports, the two plate spring supports are symmetrically arranged and connected with a vehicle frame, support mounting holes are formed in the cross beam main body, and an intercooler protecting plate is fixed on the cross beam main body through the support mounting holes.
The utility model further improves that the beam main body adopts rectangular steel pipes.
A further development of the utility model provides that the axis of the beam body is located in front of the axis of the eccentric mounting hole, so that the beam support can be formed as an eccentric structure.
According to a further improvement of the utility model, two bracket mounting holes are arranged and symmetrically arranged on two sides of the center of the beam main body.
According to a further improvement of the utility model, the top of the beam support is provided with a connecting hole, one end of the plate spring support is provided with a bolt hole corresponding to the connecting hole, and the beam support is connected with the plate spring support through the connecting hole and the bolt hole in a bolt connection mode.
According to a further improvement of the utility model, the eccentric mounting hole is positioned at the bottom of the beam support, the beam support is provided with a welding hole communicated with the eccentric mounting hole, and the beam support is welded with the beam main body through the welding hole.
The utility model further improves that the beam support is provided with a lightening hole.
The utility model further improves that the beam support is provided with a reinforcing rib.
A further development of the utility model provides that the entire cross beam support has an inclined structure with the top inclined outwards.
Further improvements of the utility model are that the beam support is integrally formed and the corners of the beam support are rounded.
According to the technical scheme, the rectangular steel tube is directly selected as the main body of the cross beam, press bending treatment is not needed, the structure is simple, the longitudinal plane of the rectangular cross beam is large in size, and the rectangular cross beam can be used as the mounting plane of other brackets. The beam support adopts an eccentric structure design, so that the position of the beam main body can be moved forward, the gap between the beam main body and an engine oil bottom shell is increased, interference is avoided, the assembly difficulty is greatly reduced, the beam support is connected with the plate spring support through bolts, the beam support does not occupy the mounting hole position on the frame, and interference with the mounting hole position of the plate spring support is avoided. Therefore, the beam has reasonable design, simple structure and less occupied transverse space, reduces the manufacturing cost, can avoid the oil pan and is suitable for popularization.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of an embodiment of the present utility model.
Fig. 2 is a schematic view of a connection structure between a beam body and a mounting bracket according to an embodiment of the present utility model.
Fig. 3 is a front view of fig. 2.
Fig. 4 is a schematic view of the structure of the mounting bracket according to the embodiment of the present utility model.
Fig. 5 is a schematic view of the structure of the leaf spring support of the embodiment of the present utility model.
1. The automobile engine comprises a beam main body, 101, bracket mounting holes, 2, an engine oil pan, 3, a beam support, 301, a connecting hole, 302, a welding hole, 303, a weight reducing hole, 304, an eccentric mounting hole, 305, a reinforcing rib, 4, a frame, 5, a plate spring support, 501, bolt holes, 502, a frame connecting hole A, 503, a frame connecting hole B, 504, a shaft hole, 505 and an adjusting hole.
Detailed Description
In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, based on the embodiments in this patent, which would be within the purview of one of ordinary skill in the art without the particular effort to make the utility model are intended to be within the scope of the patent protection.
Referring to fig. 1-5, a lower beam for a commercial vehicle according to the present utility model includes a beam main body 1 and a beam support 3, wherein the beam main body 1 is a rectangular steel pipe, the beam support 3 is integrally formed, and edges of the beam support 3 are rounded.
The two ends of the beam main body 1 are respectively provided with a beam support 3, the two beam supports 3 are symmetrically arranged, the beam support 3 is provided with an eccentric mounting hole 304, namely, the axis of the beam main body 1 is positioned at the front side of the axis of the eccentric mounting hole 304, so that the beam support 3 can form an eccentric structure, the end part of the beam main body 1 is inserted into the eccentric mounting hole 304 so as to be connected with the beam support 3, the two beam supports 3 are connected with leaf spring supports 5, the two leaf spring supports 5 are symmetrically arranged, and the leaf spring supports 5 are connected with a frame 4.
Specifically, the top of the beam support 3 is provided with a connecting hole 301, one end of the plate spring support 5 is provided with a bolt hole 501 corresponding to the connecting hole 301, and the beam support 3 and the plate spring support 5 are connected in a bolt connection mode through the connecting hole 301 and the bolt hole 501. Referring to the prior art, a frame connection hole a502 and a frame connection hole B503 for connecting the frame 4 are provided at the top of the plate spring support 5, a plate spring mounting hole and a shaft hole 504 for connecting the plate spring are provided at the bottom of the plate spring support 5, and an adjusting hole 505 for tensioning.
Specifically, the eccentric mounting hole 304 is located at the bottom of the beam support 3, and the beam support 3 is provided with a welding hole 302 which is communicated with the eccentric mounting hole 304, and the beam support 3 is welded with the beam main body 1 through the welding hole 302.
The beam main body 1 is provided with a bracket mounting hole 101, and the intercooler protecting plate is fixed on the beam main body 1 through the bracket mounting hole 101. The two bracket mounting holes 101 are provided, and the two bracket mounting holes 101 are symmetrically arranged on both sides of the center of the beam main body 1.
The cross beam main body 1 is directly selected from rectangular steel pipes, press bending treatment is not needed, the structure is simple, the longitudinal plane size of the rectangular cross beam is large, and the rectangular cross beam can be used as the installation plane of other brackets. The beam support 3 adopts an eccentric structure design, so that the position of the beam main body 1 can be moved forward, the gap between the beam main body 1 and the engine oil pan 2 is increased, interference is avoided, the assembly difficulty is greatly reduced, the beam support 3 is connected with the plate spring support 5 through bolts, the beam support 3 does not occupy the mounting hole position on the frame 4, and interference with the mounting hole position of the plate spring support 5 is avoided.
In one embodiment, the beam support 3 is provided with a lightening hole 303, and the lightening hole 303 is designed to further reduce the weight of the beam support 3 as a whole.
In one embodiment, the beam support 3 is provided with a reinforcing rib 305, and the reinforcing rib 305 can further improve the overall strength of the beam support 3.
In one embodiment, the whole of the beam support 3 is of an inclined structure with the top inclined towards the outer side, and the inclined design makes the whole structure of the beam support 3 more reasonable and facilitates assembly.
The terms "upper", "lower", "outside", "inside", and the like in the description and in the claims of the present utility model and in the above drawings, if any, are used for distinguishing between relative relationships in position and not necessarily for giving qualitative sense. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the utility model described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.