JPH0134189B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a method for connecting both ends of rear shock absorbers arranged on the left and right sides of a vehicle equipped with a rigid rear axle to a rear axle housing and a vehicle body, respectively, in a vehicle assembly mass production line. This invention relates to a method for assembling a rigid rear axle, which is formed by compressing a rear coil spring, to a vehicle body.

[Prior art]

Figures 1 and 2 are side views of a conventional rigid rear axle assembly device on a vehicle body, Figure 3a is an explanatory diagram of Figure 1 viewed from the direction of arrow A, and Figure b is a
FIG. 4a is an explanatory diagram of FIG. 2 when viewed from the direction of arrow C, and FIG. 4b is a front view of a when viewed from the direction of arrow D. . In these figures, reference numeral 1 denotes a body hanger that transports the vehicle 2 at a constant speed, and 3 (3a, 3b) denotes a body hanger that is interposed between the body 2a of the vehicle 2 and the rear axle housing 4 and is located approximately symmetrically with respect to the center of the vehicle. When the rear coil spring 3 is not compressed, the rear axle housing 4 is supported by two upper control arms 20a and two lower control arms 20b against the body 2a of the vehicle 2. It has a unique structure. Reference numeral 5 denotes a rear axle attach for lifting up the rear axle housing 4, which is fixedly supported on the attach base 6 so as to be positioned substantially symmetrically with respect to the center of the vehicle. Further, reference numeral 7 denotes a lift cylinder, and its cylinder side 7a is fixed to the compression truck frame 8, and its rod side 7b is fixedly supported to the attach base 6 via a knuckle.
Further, the guide rod 9 is supported by a guide post 10 so as to be freely movable in the axial direction, and its upper end is fixedly supported by the attach base 6. Note that the guide post 10 is fixedly supported by the compression truck frame 8. On the other hand, reference numerals 11 (11a, 11b) are pivot holes provided at the lower ends of the rear shock absorbers 12 arranged on the left and right sides of the vehicle, and the upper ends of the rear shock absorbers 12 are located on the body 2 of the vehicle 2.
a via a rubber bushing 12a. Further, 13 (13a, 13b) is a pivot attached to the rear axle housing 4, and the pivot 13a, 13b and the pivot hole 11 are connected to each other.
FIG. 5 shows the assembly relationship with a and 11b.
In FIG. 5, numerals 14 and 15 are washers, 16 is a rubber bushing, and 17 is a bolt.

On the other hand, in FIGS. 2 and 4 a, the reference numeral 1
Reference numeral 8 designates a chain jig fixedly supported on the compression truck frame 8 via eye bolts 19, one free end of which is in the shape of a hook, and is connected to the drain hole 2b of the body 2a.
It is designed so that it can be hung on.

However, in the first conventional example shown in FIGS. 1 and 3a and 3b configured as described above, the raising of one lift cylinder 7 simultaneously compresses the left and right rear coil springs 3a and 3b. Therefore, if the lift force (rear coil spring compression force) exceeds the rear body weight of vehicle 2,
As shown in FIG. 1, the body 2a is raised above the rear support portion 1a of the body hanger 1.
Therefore, the pivot holes 11a and 11b on the lower end side of the rear shock absorber 12 no longer reach the pivot holes 13a and 13b on the rear axle housing 4 side (see Figures 3a and 3b). The drawback is that it is not possible to assemble the pivot holes 11a, 11b to the pivots 13a, 13b, respectively.

Therefore, the chain jig 1 shown in Figs. 2 and 4 a and b was proposed as a means to solve this drawback.
This is a second conventional example using 8. In the structure of the conventional example, before raising the rear axle attachment 5, one free end of a chain jig 18 having a predetermined length is hooked in advance to the drain hole 2b of the body 2a.
Then, raise the rear axle attachment 5, compress the rear coil springs 3a and 3b,
The pivot holes 11a and 11b on the lower end side of the rear shock absorber 12 are sequentially assembled to the pivot holes 13a and 13b on the rear axle housing 4 side. Thereafter, the rear axle attach 5 is lowered and one free end of the chain jig 18 is removed from the drain hole 2b. As a result, the rear coil springs 3a, 3
This is intended to prevent the vehicle from lifting due to an increase in the compressive force of b.

However, such conventional methods still have various problems as described below. That is, (1) it is difficult to check (electrically) whether the operator has hooked the chain jig 18 to the drain hole 2b; (2) When the rear axle attachment 5 is raised, there is a risk that the operator's hand may get caught between the chain of the chain jig 18 and a part of the compression truck. (3)
Since it is necessary to attach and detach the chain jig 18, the number of man-hours increases. (4) After the compression work of the rear coil spring 3 is completed, the compression truck loses synchronization with the vehicle 2 that is transported at a constant speed, and thereby retreats to the synchronization start position, but at this time, the chain jig 18 is securely An electrical interlock circuit is required because the condition for reversing is that it is removed from the drain hole 2b and placed on the trolley.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention has been made in view of the above-mentioned drawbacks, and is to reliably prevent excessive lifting of a vehicle when assembling a rigid rear axle to a vehicle body, and to eliminate the need for attaching and removing chains to prevent the vehicle from lifting. To provide a method for assembling a rigid rear axle to a vehicle body.

[Structure of the invention]

In order to achieve such an object, a method for assembling a rigid rear axle to a vehicle body according to the present invention is such that the rigid rear axle is interposed between the vehicle body and the rear axle housing and is disposed at substantially symmetrical positions with respect to the center of the vehicle. The pair of rear coil springs are compressed, and the pivot holes provided on the left and right sides of the rear axle housing are fitted into the pivot holes provided at the lower ends of the pair of rear shock absorbers whose upper ends are attached to the left and right sides of the vehicle body, respectively, and the two are connected. Particularly, in the method for assembling a rigid axle to a vehicle body, one of the left and right portions of the rear axle housing is lifted to compress one of the pair of rear coil springs, and the lower end of one of the rear shock absorbers is compressed. A pivot provided on one side of the rear axle housing is fitted into a pivot hole provided in the rear axle housing, and then the other of the rear axle housing is lifted up to compress the other of the pair of rear coil springs, and the other of the rear shock absorbers is compressed. The rigid rear axle is assembled to the vehicle body by fitting and coupling a pivot provided on the other side of the rear axle housing into a pivot hole provided at the lower end.

Hereinafter, the method of the present invention will be explained in detail using figures.

[Embodiments of the invention]

6 and 7 are a front view and a side view showing an embodiment of a device for assembling a rigid rear axle to a vehicle body according to the method of the present invention, and FIGS. 8 and 9 a and b.
are operation explanatory diagrams, respectively. Figure 8, Figure 9a
, reference numeral 22 (22a, 22b) is the vehicle 2
Coil springs 23, 24 are interposed between the body 2a and the rear axle housing 25 and are arranged at substantially symmetrical positions with respect to the center of the vehicle.
6 and 7, are a left rear axle attach and a right rear axle attach for lifting up the left and right sides of the rear axle housing 25, respectively, and 26 and 27 are the left rear axle attach 23 and right rear axle attach. Tutsi 24
The left attach base and the right attach base fixedly support the Further, 28 and 29 are a left lift cylinder and a right lift cylinder, whose cylinder sides 28a and 29a are fixed to the compression truck frame 30, and whose rod sides 28b and 29b are connected to the left attach base 26 and the right attach base through nuts. 27, respectively. On the other hand, the upper ends of the guide rods 31 and 32 are attached to the left attach base 26 and the right attach base 27, respectively, and the guide posts 33 and 3 are fixedly supported by the compression truck frame 30.
4 so as to be movable in the axial direction. In addition, 3
Reference numeral 5 denotes a synchronization bar provided to allow the compression cart main body to travel in synchronization with a vehicle being transported at a constant speed, and is fixed to a synchronization bar base plate 36. Also, 37
is a synchronous cylinder whose cylinder side 37a is fixed to the compression truck frame 30 and whose rod side 37a is fixed to the compression truck frame 30.
7b is attached to the synchronization bar base plate 36 via a knuckle. Furthermore, 38 is a synchronization guide rod, whose upper end is fixedly supported by the synchronization bar base plate 36 and supported midway by a synchronization guide post 39 so as to be freely movable in the axial direction. Fixed support. Also, 40
(40a, 40b) are running rails arranged parallel to the vehicle traveling direction, and 41, 42 are running wheels rotatably supported by the compression truck frame 30. In addition, 43 is an electric motor for reversing the compression truck;
44 is an electromagnetic clutch with a brake, 45 is a chain sprocket fixedly supported on the drive shaft of the electric motor 43, 46 and 47 are chain sprockets fixedly supported on the electromagnetic clutch 44 with a brake, 48 is a running wheel 41, This is a chain sprocket attached to a shaft 49 that connects the left and right sides of the shaft 42. Further, 50 is a chain that transmits torque from the chain sprocket 45 to the chain sprocket 46, and 51 is a chain that transmits torque from the chain sprocket 47 to the chain sprocket 48. As for the operation of this drive system, when the compression truck is towed by the vehicle and travels in the direction of travel of the vehicle, the chain sprockets 46 and 47 are not connected due to the action of the electromagnetic clutch 44 with brake. After the work is completed, the chain sprocket 46
and 47 are connected, and the electric motor 43 and torque are transmitted through a chain sprocket 48 fixed to the running wheel axle.
is transmitted to. The drive system has a structure that utilizes the braking action of an electromagnetic clutch with a brake 44 in order to reduce the impact when stopping at the original position.

Next, to describe the operation of the device configured as described above, first, the front surface of the rear axle housing 25 of a vehicle being conveyed at a constant speed is 200 degrees in front of the synchronization bar 35 of a rear coil spring compression truck, for example.
When it has progressed to the position of mm, the cylinder side 37a of the synchronized cylinder 37 is
Air is supplied to the synchronization bar 35, thereby causing the synchronization bar 35 to rise. Further, as the vehicle (rear axle housing 25) moves forward, the synchronizing bar 35 contacts the front surface of the rear axle housing 25, and the rear coil spring compression truck is towed while maintaining contact. At this time, the electromagnetic clutch with brake 44 is not operating, and therefore the chain sprockets 46 and 47 are not connected.

Next, air is supplied to the cylinder side 28a of the left lift cylinder 28 by the operator's push button operation, which causes the left rear axle attachment 23 to rise and move the lower left side of the rear axle housing 25 as shown in FIG. Push up to the specified height. In this state, only the left rear coil spring 22a is compressed. In this state, the operator assembles the pivot hole 53 on the lower end side of the left rear shock absorber 52 to the pivot 54 attached to the rear axle housing 25 using the washers 14, 15, rubber bush 16, and bolt 17 shown in FIG. . After assembling the left pivot hole 53 to the pivot 54, the operator simultaneously supplies air to the rod side 28b of the left lift cylinder 28 and the cylinder side 29a of the right lift cylinder 29 by operating a push button, and then While the attachment 23 is lowered, the right rear axle attachment 24 is raised to a predetermined height, thereby pushing up the lower right portion of the rear axle housing 25 as shown in FIGS. 9a and 9b. In this state, the right rear coil spring 22
b will be compressed. Then, in this state, the operator assembles the pivot hole 56 on the lower end side of the right rear shock absorber 55 to the pivot 57 attached to the rear axle housing 25 using the washers 14, 15, rubber bush 16, and bolt 17. After this, if the operator presses the work completion button, one cycle of work is completed.

On the other hand, when the rear coil spring compression truck receives a work completion signal and air is supplied to the rod side 29b of the right lift cylinder 29, the right rear axle attachment 24 is thereby lowered. and,
Next, air is supplied to the rod side 37b of the synchronous cylinder 37, and when the synchronous bar 35 is lowered, the compression truck is moved to the traveling rail by the action of the electric motor 43 and the electromagnetic clutch with brake 44.
0 and stop at the original position (synchronization start point).

〔Effect of the invention〕

As explained above, according to the method for assembling a rigid rear axle to a vehicle body according to the present invention, the rigid rear axle is interposed between the vehicle body and the rear axle housing and is disposed at a substantially symmetrical position with respect to the center of the vehicle. The pair of rear coil springs are compressed alternately, rather than simultaneously, to significantly reduce the lifting force on the vehicle, so it is no longer necessary to use chains, etc. as a means to prevent the vehicle from floating, unlike conventional methods. This has the effect of reliably preventing excessive lifting of the vehicle.

[Brief explanation of drawings]

Figures 1 and 2 are side views of a conventional rigid rear axle assembly device to a vehicle body, Figure 3a is a detailed view of Figure 1 viewed from the direction of arrow A, and Figure b is a
FIG. 4a is a detailed view of FIG. 2 when viewed from the direction of arrow C, FIG. 4b is a front view of a when viewed from the direction of arrow D, and FIG. 5
6 and 7 are front views and side views showing an embodiment of the apparatus for assembling a rigid rear axle to a vehicle body according to the method of the present invention; Figure 8, Figure 9a is Figure 6,
An explanatory diagram of the operation of the apparatus shown in FIG. 7, and FIG. 9b is a front view of FIG. 9a viewed from the direction of arrow E. 2...Vehicle, 2a...Body, 22 (22a,
22b)... Rear coil spring, 25... Rear axle housing, 52, 55... Rear shock absorber, 53, 56... Pivot hole, 5
4,57...Pivot.

Claims (1)

[Claims] 1 Compressing a pair of rear coil springs interposed between the vehicle body and the rear axle housing and disposed at substantially symmetrical positions with respect to the vehicle center, and compressing a pair of rear coil springs whose upper ends are attached to the left and right sides of the vehicle body, respectively. In a method in which a rigid axle is assembled to a vehicle body by fitting and connecting pivot holes provided on the left and right sides of the rear axle housing into pivot holes provided at the lower end of the rear shock absorber, either of the left and right portions of the rear axle housing is fitted. Lift up one side to compress one of the pair of rear coil springs, fit and connect the pivot provided on one side of the rear axle housing into the pivot hole provided on the lower end of one of the rear shock absorbers, and then Lifting the other side of the rear axle housing to compress the other of the pair of rear coil springs, and fitting and coupling the pivot provided on the other side of the rear axle housing into the pivot hole provided on the lower end of the other side of the rear shock absorber. The unique method of assembling the rigid rear axle to the vehicle body.