JPH05246349A - Manufacture of automobile - Google Patents

Abstract

PURPOSE:To facilitate the inspection, adjustment and change work of each functional part by dividing a body lower frame into a front frame, a center frame and a rear frame, and connecting the whole frame after assembling functional parts to the respective frames. CONSTITUTION:A body lower frame 1 is divided into a front frame 2, a center frame 3 and a rear frame 4, and functional parts are assembled to the respective divided frames. After connecting the front frame 2 and rear frame 4 to both end parts of the center frame 3, a beam is fixed across the center frame 4 and the center frame side end part of one connected frame.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a method of manufacturing an automobile having a frame.

[0002]

2. Description of the Related Art In today's automobiles, especially passenger cars,
The monocoque body is the mainstream, and as is well known, various skeleton members and panel materials are sequentially joined to form a white body, which is sequentially transferred to the painting line and outfitting line, and then the underbody assembly line is used for engine, Completed by assembling the undercarriage parts such as transmission, steering linkage, front and rear wheels, and finally wiring and other small parts on the next total assembly line (Showa 55).
April 20, 2014, Sankaidou, Ltd., Automotive Engineering Complete Volume 19, "Manufacturing method of automobiles", pp. 223, 224).

[0003]

However, in such a conventional automobile, since various functional parts and suspension parts to be disposed in the engine room are assembled after the body itself is assembled, Automatic assembly is difficult because the assembly direction and the assembly position are limited by the components of the vehicle body. Further, it is necessary to inspect the interlocking operation performance and the like of each of the above parts in a state of being separated by the body. For this reason, the separated body not only limits the space for inspection, but also limits the space for adjustment and part replacement work when a defect is found, so that quick inspection and adjustment work cannot be performed. It was

The present invention has been made in view of the above conventional problems, and enables inspection of various functional parts and suspension parts without space restrictions, and defects are found in these parts. The present invention provides a method for manufacturing an automobile, which enables adjustment and component replacement work to be performed easily and further enhances the rigidity of the underbody.

[0005]

In order to solve the above problems, in the present invention, a vehicle body lower frame is divided into a front frame, a center frame and a rear frame,
The functional parts to be housed and arranged in the vehicle body engine compartment together with the suspension parts are assembled to one of the front frame or the rear frame, and the suspension parts are assembled to the other of the front frame or the rear frame, and both ends of the center frame are assembled. After connecting both the front and rear frames, a beam is projectingly provided at the end of one of the combined frames, and the beam is fixed to a mounting seat provided on the other frame.

[0006]

In the above structure, since the front undercarriage parts and the various functional parts to be housed and arranged in the engine room are assembled to one of the front frame and the rear frame, the linking operation of each part at this point, etc. It is possible to carry out the inspection, and a sufficient inspection and defective adjustment space can be secured without being hindered by the body.
Further, not only the frames are simply coupled, but also the beams are coupled by being fixed on the mounting seat, and the rigidity of the underbody is improved as a result of obtaining sufficient rigidity at the coupling portion of the frames.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the front undercarriage parts and various functional parts to be housed and arranged in the engine room are assembled to the front frame. That is, as shown in FIG. 1, the vehicle body lower frame 1 is divided into a front frame 2, a center frame 3 and a rear frame 4. At the front end of the front frame 2, a front first
Cross members 5 are provided, and columns 6, 7, 8 are provided on both sides of the upper surface of the front first cross member 5 and in the middle thereof.
Is erected. Brackets 9 are attached to the outer sides of the posts 6 and 8 located on both sides and extend backward, and are joined with upper members 10 and 11 which are bent in a stepwise manner.
At the ends of the upper members 10 and 11, a box-shaped boss 12,
13 are connected. As shown in FIG. 2, a bent vertical member 14 is joined to the lower surface of the rear portion of the bosses 12 and 13, and the front second cross member 15a is attached to the lower end of the bent vertical member 14. And a mounting seat 16 consisting of a base block 15b joined to the lower surface of the front second cross member 15a. On the upper surfaces of the second front cross member 15a and the base block 15b, there are formed bolt insertion holes 17 ...
At both ends of the rear surface of 5b, a receiving gap 1 is provided between the opposite ends.
Mounting pieces 19 and 20 forming 8 are fixed. The attachment pieces 19 and 20 have connecting portions 21 and 22 extending rearward of the vehicle body. The connecting portions 21 and 22 have a rectangular closed cross-sectional shape, and a bolt insertion hole 17 is formed on the upper surface.

The front frame 2 includes a front axle unit 23 and the front axle unit 2
Undercarriage of front suspensions 27, 28, etc. fixed to the boss portions 13, 14 by supporting front wheels 25, 26 and the front axle unit 23, which are attached to both end portions of 3 via front brake devices 24. Parts are assembled. Further, in the front frame 2, an engine 31 having a radiator 29 supported by the columns 6 and 7 and an air cleaner 30 and a power train 32 having a power transmission mechanism from the engine 31 to the front axle unit 23 are provided in another engine room. All functional parts to be housed and installed are assembled.

The center frame 3 has center side members 33, 34 extending in the vehicle front-rear direction on both sides,
The center side members 33, 34 have a rectangular closed cross-section in the general part, and the bottom surface has openings 3 at both ends.
A receiving part 36 having 5 is formed. The opening 35
Flanges 37, 37 extending obliquely downward are formed on both side edges of the, and a bolt insertion hole 17 is formed on the upper surface of the receiving portion 36. The center side member 33,
On the outer surface of 34, the bolt insertion holes 1 are provided at appropriate intervals.
L-shaped brackets 38 having 7 are fixed,
A center first cross member 39 and a center second cross member 40 are bridged to the front and rear ends of the center side members 33 and 34, respectively. A central U-shaped central member 42 having a guide piece 41 vertically attached to a front end thereof is coupled to the central portion of the front surface of the center first cross member 39.
Both sides of the center member 42 and center side members 33, 3
Short members 43 and 44 are bridged between the four. One short member 44 is formed in a crank shape,
A steering shaft insertion gap 45 is formed between the central member 42 and the central member 42. Further, on both sides of the entire surface of the central member 42, there are triangular plates 46 on the side surfaces, and vertical beams 47 and 48 extending obliquely upward are connected. The bolt insertion holes 17 are formed at the lower end edges of the triangular plates 46. A flange 49 having ... Is formed. A horizontal beam 50 having an L-shaped cross section is fixed to the front ends of the vertical beams 47 and 48, and bolt insertion holes 17 ... Are formed in the horizontal plane of the horizontal beam 50.

The rear frame 4 has rear rectangular side closed side members 51, 5 extending in the vehicle front-rear direction on both sides.
2, and bolt insertion holes 17 ... Are formed in the upper surfaces of the front end portions of the rear side members 51, 52. There should be a small gap between the front ends of the rear side members 51, 52,
The rear first, second, and third cross members 53, 54, 55 are bridged, and the rear first cross member 53 and the rear second
A plurality of blocks 56, ... Are interposed between the cross members 54, and an oblique plate 57 is fixed to the upper surface between the second rear cross member 54 and the third rear cross member 55. Further, a rear fourth cross member 58 is provided at a substantially middle portion of the rear side members 51, 52, and standing members 59, 60 are coupled to both ends of the rear fourth cross member 58, respectively. An upper cross member 61 is laterally provided at the upper ends of 59 and 60. Short side members 62 and 63 are connected to the rear surfaces of both ends of the upper cross member 61, and the short side members 62 and 63 are supported by columns 64 and 65 connected to the side surfaces of the rear side members 51 and 52. A lower cross member 66 is connected between the lower ends of the columns 64 and 65. The rear frame 4 includes the rear suspensions 67 and 68 and the rear suspensions 67 and 6.
Rear wheel 7 attached to the vehicle 8 through the brake device 69
Rear suspension parts such as 0 and 71 are attached. The suspension arms 72 of the rear suspensions 67 and 68 are fixed to the slanted plate 57 via bushes, and the rear suspensions 67 and 68 are provided with a coil spring 73, a shock absorber 74 and the like. ..

On the other hand, the body 75 is a main body 78 in which a cabin 76 and a trunk room 77 are integrally formed.
And an engine compartment assembly 79 molded separately. The cabin 76 has frame members such as a front pillar 80, a center pillar 81, a rear pillar 82, a cowl box 83, and the like, and also has a floor panel 84, a dash panel 85, a front door 86, a rear door 87, a roof panel 88, a front window 89,
It is separated by a rear window 90 and the like, and inside the cabin 76, interior and functional parts such as an instrument panel 91 and a steering wheel 92 are arranged. The trunk room 77 is divided by a rear fender panel 93, a trunk lid 94, a rear end panel (not shown), etc., and a rear bumper 95 is mounted. On the lower surface of the floor panel 84, a frame body 100 made up of front and rear members 95, 96 on both sides and vehicle width members 97, 98, 99 bridged between the front and rear members 95, 96 is attached. Each vehicle width direction member 97,
Brackets 101 ... In which bolts (not shown) are welded are fixed to the side surfaces 98 and 99. On both sides of the cowl box 83, a connecting portion 104 having an opening 102 on the front surface and a drain hole 103 on the side surface is formed, and a bolt insertion hole is formed on the side surface of the connecting portion 104. On the other hand, the engine compartment assembly 79 has hood ridge panels 106 and 107 that form both side walls of the engine room 105. The hood ridge panels 106 and 107 are provided at the rear ends thereof with the connecting portion 10.
A joggle portion 108 that can be fitted in the opening 102 of No. 4 is formed. A front end panel 110 is attached to the front end portions of the hood ridge panels 106 and 107 via a triangular corner plate 109, and a head lamp unit 111 and a front grill 112 are provided on the front surface of the front end panel 110. , Front bumper 1
13 is attached. Further, a bolt insertion hole 17 is formed at the front end of the hood ridge panels 106 and 107, and a reinforcement 114 is attached to the outer surface of the hood ridge panel 106, 107. The bolt insertion is made at the rear end of the reinforcement 114. A plate 116 having a hole and a flange 115 bent obliquely outward at the tip is fixed. In the figure, 117 is a reinforcement 10.
A pair of front fender panels (only one of which is shown) attached to the outside of 6,107 is an engine hood.

In this embodiment having the above structure, the front frame 2, the center frame 3, the rear frame 4, the main body 78, and the engine compartment assembly 79 are assembled in separate lines. That is, in the assembly line of the front frame 2, the assembly of the members 5, 10, 14, ...
After the coating process, the front axle unit 23, the front brake device 24, the front wheels 25, 26, the front suspension parts 27, 28, and the like, as well as the engine 31 and other functional parts to be housed and arranged in the engine room 105 are provided. Be assembled. At this time, since the periphery of the front frame 2 is in a released state,
There is no restriction on the robot arm, and it becomes possible to automatically assemble each component from any direction. After the assembly of each component is completed, the performance inspection is performed in the final process of the line, so that the inspection can be executed without being hindered by the body 75, and the adjustment and the component when the defect is found by the inspection. A sufficient exchange space can be secured.
On the other hand, the rear frame 4 side is also inspected after completion of automatic assembly. Then, the front frame 2, the rear frame 4, and the center frame 3 which have been assembled and inspected are conveyed to a predetermined assembly line. At this time, since the frames 2, 3 and 4 are divided, the packing shape during transportation is reduced, and the transportation work is facilitated. Then, in a predetermined assembly line, the front frame 2 and the rear frame 4 are arranged to face each other, and the center frame 3 is lowered from above. Then, the openings 35 of the receiving portions 36 formed at both ends of the center frame 3 are fitted with the flanges 37.
While being guided by, the outer frame is fitted onto the front end portions of the connecting portions 21 and 22 and the rear side members 51 and 52 of the front frame 2. At the same time, the guide piece 41 is fitted in the receiving gap 18,
As a result, the horizontal beam 50 of the center frame 3 comes to the front cross member 15b, the flange 49 of the triangular plate 46 comes to the base block 15b, and the bolt insertion holes 17 ... Align with each other. Then, insert the bolt 119 into each bolt insertion hole 17 from above,
The frames 2, 3 and 4 are joined by screwing a nut. In particular, the frame 2 and the center frame 3 are connected not only by connecting the connecting portions 21, 22 and the receiving portions 36, 36, but also by connecting the rear second cross member 15a and the base block 15b to the vertical beams 47, 48 and the horizontal beams 50. Has been done. Therefore, sufficient coupling strength can be obtained between the front frame 2 on which the heaviest engine 31 and the like are mounted and the center frame 3 on which the weight of the occupant is loaded. Moreover, since the vertical beams 47 and 48 and the horizontal beam 50 are both fixed to the upper surface of the mounting seat 16, not only can the center frame 3 on which the weight of the occupant is loaded be effectively supported, as described above, Vertical beams 47 and 48 and horizontal beams 5 extending in different directions
It is possible to counter the torsional stress generated in each direction by cooperating with zero.

After connecting the frames 2, 3 and 4 in this manner, the main body 78 is placed on both the center and rear frames 3 and 4, and the brackets 101 on the lower surface of the floor panel 84 and the center frame 3 are joined together. The bracket 38 is bolted. Next, similarly, the joggle portion 108 formed on the hood ridge panels 106 and 107 of the engine compartment assembly 79 that has undergone the assembly process of another line is inserted into the connecting portions 103 and 104 of the main body 78. Further, the plate 1 is attached to the connecting portions 103 and 104.
16 are fixed by bolts, so that the bolts 1 are inserted into the corresponding bolt insertion holes 17 of the hood ridge panels 106 and 107.
19 is inserted and fixed to the bracket 9 of the columns 6 and 8. Thereafter, the front fender panel 117 is fixed to the outside of the hood ridge panels 106 and 107 by an appropriate fixing means, and the engine hood 118 is fixed to the engine room 105.
It is attached to the opening edge of the via a hinge (not shown).

In the above-described embodiment, the mounting seat 16 is provided on the front frame 2 side of the front frame 2 and the center frame 3 which are connected to each other, and the vertical beams 47 and 48 and the horizontal beam 50 are provided on the center frame 3 side. However, it is also possible to have a configuration opposite to this, and the center frame 3
The rigidity of the rear underbody can also be improved by making the connecting portion between the rear frame 4 and the rear frame 4 have the same structure.

Further, the engine compartment assembly 79 is attached to the front frame 2 on which the engine 31 and the like are mounted.
Attach the reinforcement 114 to the main body 78
If the front frame 2 is fixed to the connecting portion 104, the front frame 2 is prevented from tilting forward (arrow A in FIG. 1) and is kept horizontal.
Therefore, in this state, if the center frame 3 is moved from the rear side to the front side so as to be coupled, the front frame 2 and the rear frame 3 can be coupled without particularly using a front fall prevention means of the front frame 2.

[0016]

As described above, according to the present invention, the lower frame of the vehicle body is divided into the front frame, the center frame and the rear frame, and the one of the front frame and the rear frame is accommodated in the vehicle body engine compartment together with the undercarriage parts. The functional parts to be assembled are assembled, the underbody parts are assembled to the other of the front frame or the rear frame, and both the front and rear frames are connected to both ends of the center frame. Therefore, the parts can be assembled from any direction without being hindered by the body, and the automatic assembly of the parts using the robot can be easily realized. Also, when each part is assembled to the frame, inspections such as linkage operation can be performed, and a sufficient inspection space can be secured to facilitate the inspection.
This makes it possible to easily perform adjustment and parts replacement work when a defect is found.

Further, since the beam is projectingly provided at the end of one of the frames which are phase-coupled to each other and the beam is fixed to the other frame, the frame is not only coupled but also the beam and the mounting seat. By virtue of the cooperation with and, it is possible to obtain sufficient rigidity for the underbody even if the lower frame of the vehicle body is divided into three parts.

[Brief description of drawings]

FIG. 1 is an overall exploded perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a structure of a joint portion between a front frame and a center frame, which is viewed from a direction different from FIG.

[Explanation of symbols]

 1 ... Lower body frame 2 ... Front frame 3 ... Center frame 4 ... Rear frame 16 ... Mounting seat 23 ... Front axle unit (front suspension parts) 24 ... Front brake (front suspension parts) 25, 26 ... Front wheels ( Front undercarriage parts 31 ... Engine (functional parts) 47, 48 ... Vertical beams 50 ... Horizontal beams 67, 68 ... Rear suspension (rear undercarriage parts) 70, 71 ... Rear wheels (rear undercarriage parts)

Claims (1)

[Claims] 1. The lower frame of the vehicle body is a front frame,
Separately molded into a center frame and a rear frame, one of the front frame or rear frame is assembled with functional parts to be accommodated in the vehicle body engine compartment together with the undercarriage parts, and the other part of the front frame or the rear frame is undercarriage. After assembling the parts and connecting both the front and rear frames to both ends of the center frame, the beam is fixed across the center frame side end of one of the combined frames and the center frame. Car manufacturing method.