CN101214827B

CN101214827B - Auxiliary frame of passenger car

Info

Publication number: CN101214827B
Application number: CN2007100329803A
Authority: CN
Inventors: 吕波涛
Original assignee: SAIC Chery Automobile Co Ltd
Current assignee: Chery Automobile Co Ltd
Priority date: 2007-12-29
Filing date: 2007-12-29
Publication date: 2011-05-11
Anticipated expiration: 2027-12-29
Also published as: CN101214827A

Abstract

The invention relates to a structure of a subframe of a passenger car and aims to improve the positioning condition and promote assembly accuracy and reduce assembly difficulty. The subframe of the passenger car is equipped with a transverse support beam of a water tank along the front-back direction of the entire passenger car from the front side to the back side. A front horizontal beam, a left and right vertical beams and a back horizontal beam are welded to form an approximate square frame. The structure is characterized in that the four corners of the frame is equipped with four installation holes, wherein, the first hole is an accurate positioning hole, the second hole is a strip-shaped hole, the hole length direction of the second hole is positioned on the connecting line direction of the first hole and the second hole, and the hole diameter of the third hole and that of the fourth hole are larger than the hole diameter of the first hole. In the invention, three allowance holes are coordinated mutually via the accurate positioning hole, which can compensate the deviation caused by stamping and welding.

Description

Auxiliary frame of passenger car

Technical field

The present invention relates to the auxiliary frame of passenger car structure.

Background technology

Because external punching press, welding process level are higher, therefore at subframe assembling, locate mode design aspect, not too many concern is by analyzing some external these type components, all be to rely on good technological level to guarantee high dimensional accuracy, can not have assembling, locate problems such as inaccurate.But domestic because punching press, welding process level are far below abroad, but the design of subframe at present is still with reference to external frame mode, through this application in practice in several years, because the low appearance assembling difficulty that causes of technological level, have a strong impact on efficiency of assembling, strengthen labor strength, under the very large situation of current production rate, have a strong impact on the benefit of car load factory.

In addition, but since subframe generally will with the dynamic assembly packing after one be connected vehicle body, therefore bulky, quality is also very big, subframe and body contact are to aim at the back by connecting bore to use bolt urgent, therefore each car is installed subframe all needs several workmans to adjust position alignment repeatedly, has a strong impact on efficiency of assembling and working strength of workers.

Summary of the invention

Purpose of the present invention just provides auxiliary frame of passenger car, improves location condition, improves assembly precision and reduces assembly difficulty.

For achieving the above object, the present invention has adopted following technical scheme: auxiliary frame of passenger car, after going to, horizontal water tank support beam is arranged along the car load fore-and-aft direction, front cross rail, left-right longeron and after cross member welding constitute the framework of general square shape, it is characterized in that: four bights at framework are provided with four mounting holes, wherein first hole is accurate knock hole, second hole is a bar hole, the hole length direction in second hole is positioned on the line direction in first hole and second hole, and the aperture in all the other the 3rd holes, the 4th hole is greater than the aperture in first hole.

In the technique scheme, in four bights of framework four mounting holes are set, wherein first hole is accurate knock hole, can realize that by this first hole and with bolt location, assembling connect accurately.

The present invention cooperates three convenient holes that surplus is installed that have of installing to cooperatively interact by an accurate knock hole, be enough to remedy punching press, weld the deviation that causes, solve the problem of difficult assembling fully, reduced technological requirement again simultaneously, also reduced the technology cost certainly.

Description of drawings

Fig. 1 is a structural representation of the present invention;

The positioning principle physical model figure that Fig. 2 the present invention simplifies;

Fig. 3 is the structural representation of locating dowel pin (31).

The specific embodiment

Auxiliary frame of passenger car, it is characterized in that: after going to, horizontal water tank support beam 10 is arranged along the car load fore-and-aft direction, front cross rail 30, left and right longeron 40,50 and after cross member 60 welding constitute the framework 70 of general square shape, four bights at framework 70 are provided with four

mounting holes

71,72,73 and 74, wherein first hole 71 is accurate knock hole, second hole 72 is a bar hole, the hole length direction in second hole 72 is positioned on the line direction in first hole 71 and second hole 72, and the aperture in all the other the 3rd holes 73, the 4th hole 74 is greater than the aperture in first hole 71.

The aperture and the hold-down bolt in described first hole 71 are complementary, and described first hole 71 is as far as possible accurately for accurate knock hole is that its aperture of system offers, and realizing accurately cooperating just to conform to the diameter of bolt that cooperatively interacts is standard.

The position in described first hole 71 need not special requirement, and second hole 72 can be opened on the adjacent angular in first hole 71, also can be opened on the diagonal position.The arrangement that Fig. 1 provides is comparatively preferred scheme, and promptly described first hole 71 and second hole 72 are positioned at the left and right sides two-end part of front cross rail 30, and the 3rd hole 73, the 4th hole 74 are positioned at the rearward end of left-right longeron 40,50.

In conjunction with the positioning principle model that Fig. 2 provides, as follows to positioning principle brief description of the present invention.The present invention has utilized exactly in a plane, and a point adds that a line can be to the abundant constraint principles of body freedom.As shown in Figure 2, four mounting holes, anterior two mounting holes are the center of circle in-line in first hole 71 and second hole 72, and it is parallel with car load transverse horizontal direction to constitute straight line, first hole 71 is a circular hole, diameter dimension and hold-down bolt are complementary, guarantee that the location rationally, after first hole 71 is fixed, subframe still can be around the axis rotation in first hole 71, and second hole 72 is the U-shaped hole, or becomes ellipse shape hole or bar hole, its length direction is the straight line parallel that first hole 71 and second hole 72 constitute, form the line of a constraint subframe, thereby the subframe position is fully retrained, the 3rd hole 73 around 71 rotations of first hole, the 4th hole 74 is a circular hole, diameter just plays fastening effect greater than the diameter in first hole 71.This shows, with respective bolt first hole 71 is installed separately and can have the installation difficulty, after this point is installed, owing to second hole 72 on same the horizon is slotted hole in the horizontal direction, the surplus of slotted hole end wise is enough to remedy the dimensional discrepancy that the punching press welding causes, after install in first hole 71 and second hole 72, the 3rd hole 73 is installed, during the 4th hole 74, because they are to consider punching press, the macropore of welding departure, be enough to remedy punching press, the deviation that welding causes, therefore just overcome because the assembling difficult problem that the fresh water (FW) adjustment causes, in production practice through repeatedly attempting, utilize this mode to solve difficult assembly problem fully, reduced technological requirement again simultaneously, also reduced the technology cost certainly.

In conjunction with Fig. 1,3, the left and right sides two-end part of described front cross rail 30 is provided with locating dowel pin 31, and locating dowel pin 31 is arranged at the top of front cross rail 30, and is positioned at

first hole

71 and 72 outsides, second hole.Being shaped as of locating dowel pin 31 is bullet-shaped.

The locating dowel pin 31 that provides in this invention, the corresponding position offers the hole that matches with locating dowel pin 31 on vehicle body, when assembling subframe and dynamic assembly, only need aim at the corresponding room of vehicle body to locating dowel pin 31 gets final product, improve efficiency of assembling greatly and reduce labor strength, very effective through practical operation, locating dowel pin 31 is designed to warhead shape can play good directional tagging, makes contraposition accurately, fast.

Claims

1. auxiliary frame of passenger car, it is characterized in that: after going to, horizontal water tank support beam (10) is arranged along the car load fore-and-aft direction, front cross rail (30), a left side, right vertical beam (40,50) and after cross member (60) welding constitute the framework (70) of general square shape, it is characterized in that: four bights at framework (70) are provided with four mounting holes (71,72,73 and 74), wherein first hole (71) are accurate knock hole, second hole (72) is a bar hole, the hole length direction in second hole (72) is positioned on the line direction of first hole (71) and second hole (72), all the other the 3rd holes (73), the aperture in the 4th hole (74) is greater than the aperture of first hole (71).

2. auxiliary frame of passenger car according to claim 1 is characterized in that: the aperture and the hold-down bolt in described first hole (71) are complementary.

3. auxiliary frame of passenger car according to claim 1 and 2, it is characterized in that: described first hole (71) and second hole (72) are positioned at the left and right sides two-end part of front cross rail (30), and the 3rd hole (73), the 4th hole (74) are positioned at the rearward end of left and right longeron (40,50).

4. auxiliary frame of passenger car according to claim 1, it is characterized in that: the left and right sides two-end part of described front cross rail (30) is provided with locating dowel pin (31), locating dowel pin (31) is arranged at the top of front cross rail (30), and is positioned at first hole (71) and second hole (72) outside.

5. auxiliary frame of passenger car according to claim 4 is characterized in that: being shaped as of locating dowel pin (31) is bullet-shaped.