JPH0620688B2 - Vehicle drive shaft assembly method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for assembling a vehicle drive shaft in which joint units such as a bell type and a tripod type constant velocity joint are provided at both ends.

(Prior Art) In a conventional drive shaft assembly line, Japanese Patent Laid-Open No. 61-
As disclosed in Japanese Patent No. 284333, an assembling station for assembling each predetermined component of the first joint unit, which is provided at one end of the drive shaft, and a second station, which is provided at the other end of the drive shaft, are provided in a conveying path of the drive shaft. The assembling stations for assembling the respective predetermined constituent parts of the joint unit are alternately arranged, and the constituent parts of the first joint unit and the constituent parts of the second joint unit are alternately assembled to a part of the drive shaft. I am trying.

(Problems to be Solved by the Invention) By the way, it is general that each assembly station is provided with a backup unit for centering and holding the drive shaft at the end opposite to the end for assembling the parts. In the above prior art, when the type of one of the first and second joint units, for example, the second joint unit is changed,
In addition to the specification change of the assembling device provided in each assembling station for the second joint unit, the second joint unit in which the backup unit provided in the assembling station for the first joint unit is assembled at the preceding assembling station It is necessary to change the specifications to those corresponding to the component parts of, and there is a problem that the work takes time.

In view of such a problem, it is an object of the present invention to provide a drive shaft assembling method capable of promptly coping with a model change without requiring a specification change of a backup unit due to a model change of a joint unit. .

(Means for Solving the Problems) In order to achieve the above object, the present invention assembles a plurality of assembling stations that sequentially convey a drive shaft at each end of the drive shaft to assemble each component of the first joint unit. And a second station group for assembling the respective components of the second joint unit provided at the other end of the shaft, and each group belonging to the first station group. In the attachment station, the respective components of the first joint unit are assembled with the other end of the drive shaft being centered by the backup unit that directly holds the other end of the drive shaft, and the first joint unit in the first station group After completing the assembling of the first station, the first station at each of the assembling stations belonging to the second station group.
It is characterized in that each component of the second joint unit is assembled in a state where one end side of the drive shaft is centered by the backup unit which holds the outer shaft portion of the joint unit.

(Operation) 1st to 1st end of drive shaft in 1st station group
Until the assembly of the joint unit is completed, the components of the second joint unit are not assembled to the other end of the drive shaft, and the other end of the drive shaft provided at each assembly station of the first station group is The backup unit for centering and holding may be configured to directly hold the other end of the drive shaft, and it is not necessary to change the specifications of the backup unit by changing the model of the second joint unit. In addition, the backup unit provided in each assembly station of the second station group holds the outer shaft of the first joint unit because the assembly of the first joint unit has been completed in the first station group. The shape of the outer shaft portion does not change significantly depending on the model of the joint unit. Therefore, it is not necessary to change the specifications of the backup unit of the second station group by changing the model of the first joint unit. The change in the type of each second joint unit can be dealt with only by changing the specification of the assembling device arranged at each assembling station of the corresponding station group.

(Example) An example in which the present invention is applied to the assembly of the drive shaft A shown in Fig. 4 will be described below.

This drive shaft A has a first joint unit B composed of a bell type constant velocity joint at one end A ₁ (output end) and the other end A ₂
Second (tri-port type constant velocity joint) (input end)
A drive shaft for an FF vehicle having a joint unit C and a damper weight D in the middle thereof. The first joint unit B is a joint in which an outer B ₁ , an inner B ₂ , a ball B ₃ , and a retainer B ₄ are assembled. It is composed of a body B ₅ , a stopper ring B ₆ for locking the inner B ₂ to the drive shaft A, and a rubber boot B _7, and the second joint unit C includes an outer C ₁ , a spider C ₂ and a spider. Roller C ₃ mounted on C ₂ and spider
It is composed of a pair of circlips C ₄ and C ₅ that lock C ₂ to the drive shaft A, and a rubber boot C ₆ .

FIG. 1 shows the assembly process of the drive shaft A. A total of 10 stations S ₁ to S 10 are provided in the shaft transport path, and the intermediate 5th station S ₅ is the reversing station, and the first station group on the preceding stage side. Assembling the first joint unit B in (1) and the second station group on the rear stage side (2)
Then, the second joint unit C is assembled.

To explain this in detail, first, the damper weight D is assembled to the drive shaft A at the first station S ₁ , and then the rubber boot B ₇ and the third station S at the second station S ₂ are attached to one end A ₁ of the drive shaft A. _The stopper ring B _{6 at 3} and the joint body B _{5 at} the 4th station S ₄ are sequentially assembled to complete the assembling of the 1st joint unit B, and then the drive shaft A is set to 1 at the 5th station S _5.
Flip 80 ° to the other end A _{2 of the} shaft A, the rubber boot C ₆ at the 6th station S ₆ , the circlip C ₄ at the 7th station S ₇ , and the spider C ₂ at the 8th station S _8. After assembling the clip C ₅ and then injecting grease into the rubber boot B ₇ of the first joint unit B at the 9th station S ₉ to cover the outer B ₁ with the boot B ₇ , spider at the 10th station S 10. with the C ₂ assembled roller C _3, covered with a rubber boot C ₆ wearing the outer C ₁ injected beforehand grease around the spider C _2, and so complete the assembly of the second coupling unit C.

By the way, at each of the stations S _{1 to} S ₄ , S _{6 to} S ₈ and S 10 where parts are assembled, in addition to an assembling device (not shown) for assembling each predetermined part to the drive shaft A A backup unit for centering and holding is provided at the end opposite to the assembly end,
FIG. 2 shows a backup unit (3) provided in stations S _{1 to} S ₄ belonging to the first station group (1), and FIG. 3 shows S _{6 to} S ₈ and S ₁₀ belonging to the second station group (2). The backup unit (4) provided in the station is shown.

The backup unit (3) shown in FIG. _{2 has} a center plate (6a) that abuts against the end face of the other end A ₂ of the drive shaft A, on a base plate (5) that is moved back and forth in the axial direction of the drive shaft A by a drive mechanism (not shown). A seat (6) provided with a collet chuck (7) for gripping the other end A ₂ is attached around the seat (6), and the chuck (7) is fixed to the base plate (5) with an outer sleeve (7a). Cylinder (7
The operation sleeve (7c) that is advanced and retracted in b) and the collet (7d) that is opened and closed by the sleeve (7c) are provided, and the seat (6) is moved to the shaft end surface by the forward movement of the base plate (5). The operating sleeve (7c) is moved forward in the state of being abutted against the collet (7d), and the other end A ₂ of the drive shaft A is centered and held.

The backup unit (4) in FIG. 3 aligns and holds one end A ₁ side of the drive shaft A with the outer B ₁ of the first joint unit B, and a spring (8
Install the center pin (8) that is urged forward by (a) and the collet chuck (7) similar to the backup unit (3) above, and attach the outer sleeve to the tip of the outer sleeve (7a) of the chuck (7). The posture correcting ring (9) that comes into contact with the stepped surface on the shaft side of B ₁ is attached, and the ring (9) is brought into contact with the stepped surface by the forward movement of the base plate (5), and the outer B
The posture of _{No. 1} was corrected so that the shaft portion was aligned with the axis of the drive shaft A, and in this state, the collet (7c) was closed to grip the shaft portion of the outer B ₁ .

(Effect of the invention) As described above, according to the present invention, since the second joint unit is assembled to the other end of the drive shaft after the first joint unit is assembled to the one end of the drive shaft, First
The centering of the other end of the drive shaft in each assembly station belonging to the station group can be performed by directly holding the other end of the backup unit, and the specifications of the backup unit can be changed by changing the model of the second joint unit. Is unnecessary, and the centering on the one end side of the drive shaft at each assembly station belonging to the second station group for the second joint unit is performed by using the outer shaft portion of the first joint unit already assembled at one end of the shaft. This can be done by holding with a backup unit. Since this shaft part has little shape difference due to the model, it is not necessary to change the specifications of the backup unit of the second station group by changing the model of the first joint unit, and the joint unit model It is easy to deal with changes and improve productivity.

[Brief description of drawings]

FIG. 1 is a view showing a process of assembling a drive shaft according to the present invention, FIG. 2 is a sectional view of a backup unit for a first station group, and FIG. 3 is a sectional view of a backup unit for a second station group. FIG. 4 is a vertical sectional view of the drive shaft. A …… Drive shaft A ₁ …… One end A ₂ …… The other end B …… First joint unit C …… Second joint unit S _{1 to} S ₁₀ …… Station (1) …… First station group (2) …… Second station group (3) (4) …… Backup unit

Claims (1)

[Claims] 1. A method of assembling a drive shaft for a vehicle, wherein joint units are provided at both ends, wherein the drive shaft is sequentially conveyed to a plurality of assembly stations and the components of these joint units are assembled to the drive shaft. In the first station group, the plurality of assembling stations are installed at one end of a drive shaft for assembling each component of the first joint unit, and each component of the second joint unit provided at the other end of the shaft. The second station group for assembling is arranged as a group, and the other end side of the shaft is cored by a backup unit that directly holds the other end of the drive shaft in each assembling station belonging to the first station group. Assemble each component of the first joint unit in the determined state, and install the first joint unit in the first station group. After the assembly of the completed first in each set with the station belonging to the second station group 1
A drive unit for a vehicle, characterized in that each component of the second joint unit is assembled in a state in which one end side of the drive shaft is centered by a backup unit holding an outer shaft portion of the joint unit. Assembly method.