Metal working – Plural diverse manufacturing apparatus including means for... – Binding or covering and cutting
Reexamination Certificate
2001-04-03
2002-07-23
Briggs, William (Department: 3722)
Metal working
Plural diverse manufacturing apparatus including means for...
Binding or covering and cutting
C029S447000, C072S405030, C413S043000, C413S062000
Reexamination Certificate
active
06421894
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Technical Field
The present invention relates to an apparatus for assembling an anti-vibrating device of a liquid-filled type principally used as a vehicular body mount or engine mount or the like.
2. Related Art
A liquid-filled-type anti-vibration device A, for example, as shown in
FIG. 11
has been developed as a body mount to be interposed between a vehicular body and a frame such as a suspension on a support side to support the body in an anti-vibrating fashion.
This anti-vibration device A has an inner cylinder
1
made of a comparatively thick-walled metal to be coupled and fixed to one of the vehicular body and the frame on the suspension side and an outer cylinder
2
made of a metal to be coupled and fixed to the other. The inner and outer cylinders
1
,
2
are joined through a rubber elastic member
3
vulcanization-bonded to an outer periphery of the inner cylinder
1
and an intermediate cylinder
4
fitted at an inner side of the outer cylinder. Furthermore, two liquid chambers
5
a
,
5
b
are provided between the inner and outer cylinder
1
,
2
in locations opposed to each other sandwiching the inner cylinder
1
. These liquid chambers
5
a
,
5
b
are in mutual communication through an orifice passage
6
, thus obtaining a vibration damping effect due to an effect of liquid flow between the chambers.
The foregoing intermediate cylinder
4
is vulcanization-bonded to the outer periphery of the rubber elastic member
3
. The intermediate cylinder
4
has at one end an outwardly directed flange
4
a
and opened in a window form in the position corresponding to the chambers
5
a
,
5
b
, and press-fitted to the inner side of the outer cylinder
3
through a sealing rubber layer
7
and fitted airtight, thereby forming the liquid chamber
5
a
,
5
b
between the cylinders
1
,
2
.
Furthermore, the outer cylinder
2
has a flange
2
a
bent to an outer side with which the flange
4
a
of the intermediate cylinder
4
contacts. The flange
2
a
has an end
2
b
caulked inside and fixed in a manner wrapping from an outside an end edge of the flange
4
a
of the intermediate cylinder
4
, thereby firmly holding the fit state.
In the manufacture of the anti-vibration device A structured as above, previously prepared is an internal unit A
1
integrated with an inner cylinder
1
and an intermediate cylinder
4
through a rubber elastic member
3
by vulcanization-forming the rubber elastic member
3
. Separately from this, previously formed is an outer cylinder
2
having at one end a flange
2
a
and bent at the end
2
b
thereof to an axial direction as the chain line of FIG.
11
.
In an assembling process, in a liquid tank filled with a liquid such as ethylene glycol to be charged in the internal liquid chambers
5
a
,
5
b
, the internal unit A
1
is press-fitted into the outer cylinder
2
in a direction from the flange
2
a
while discharging interior air, thereby bringing the flange
4
a
of the intermediate cylinder
4
into contact with the flange
2
a
of the outer cylinder
2
. Furthermore, in this state, the flange
2
a
of the outer cylinder
2
is caulked to be bent inward, thus completing the assembling.
In this assembling, conventionally the caulking at the flange end of the outer cylinder
2
has been made by a oncebending process. In this case, because the end
2
b
of the flange
2
a
of the outer cylinder
2
is bent inward by once caulking to an inward that is in generally a rectangular direction from the axial direction of the outer cylinder, the bend angle amounts to 90 degrees or greater and the deformation amount is large. There has been a possibility that the bend portion buckles readily causing cracking and breakage. Consequently, there has been a setback to reducing the product durability and quality and further yield of manufacture.
It is an object of the present invention to provide, as principally an assembling apparatus for a liquid-filled-type anti-vibration device, an assembling apparatus which can caulk an end edge of an outer cylinder while suppressing occurrence of buckling without causing crack or breakage, thereby improving the endurance and quality of an anti-vibration device to be assembled and further improving manufacture yield.
SUMMARY OF THE INVENTION
An apparatus for assembling an anti-vibration device of the present invention has an inner cylinder, an outer cylinder arranged outward of the inner cylinder, a rubber elastic member arranged between the inner and outer cylinders, an intermediate cylinder fitted inward of the outer cylinder, and a liquid chamber formed in an interior of the rubber elastic member, the anti-vibration device assembling apparatus comprising: a press-fit device for press-fitting an internal unit united with an inner cylinder and an intermediate cylinder through a rubber elastic member to an outer cylinder within a liquid tank; a caulking device for caulking an axial one end of the outer cylinder of an assembly completed of press-fitting; and transport means for transporting the assembly from the press-fit device to the caulking device; wherein the caulking device being provided to allow two stages of caulking by first and second two kinds of caulking dies including caulking to bend an end of the outer cylinder of the assembly by a predetermined angle less than 90 degrees and caulking to further bend the end of the outer cylinder already bent to a certain degree into a predetermined caulking form.
According to this assembling apparatus, an internal unit united with an internal cylinder and an intermediate cylinder through a rubber elastic member and an outer cylinder are supplied to the press-fit device to press-fit the internal unit to the outer cylinder within a liquid tank. An assembly thus completed in press-fitting is transported by proper transport means from the press-fit device to the caulking device to carry out caulking. On this occasion, a first-staged caulking is made by the first caulking die to bend an end of the outer cylinder of the assembly by a predetermined angle less than 90 degrees. Next, second-staged caulking is made by the second caulking die to bend furthermore the one end of the outer cylinder already bent to a certain degree and finally form it into a predetermined caulking form.
In this manner, when caulking one end of the outer cylinder, predetermined caulking is completed to a bend angle of about 90 degrees or greater by two-staged caulking with the first caulking die and second caulking die.
Due to this, as compared to the conventional case of once caulking to a predetermined angle, it is possible to prevent the occurrence of damage, such as cracks, and hence improve the endurance and quality of the anti-vibration device manufactured. Also, prevention is made against occurrence of cracks due to bending in caulking, the manufacture yield of the anti-vibration device is by far improved.
The caulking device may comprise a caulking lower die for supporting the assembly with the axial one end to be caulked positioned up, and first and second caulking dies vertically movably supported in the above of the lower die, the first caulking die for applying a first stage of caulking to the axial one end of said outer cylinder of said assembly supported in said lower die, and said second caulking die for applying a second stage of caulking to the one end in order for further bending into a predetermined form.
According to this caulking device, the assembly completed in press-fit in the press-fit device is supported in the caulking lower die with the axial end positioned up. In this state, the first caulking die is first descended relative to the lower die and first-staged caulking is made to bend the axial end of the outer cylinder of the assembly by a required predetermined angle less than 90 degrees. Next, the second caulking die is descended relative to the lower die and the one end of the outer cylinder somewhat bent as above is further bent into a predetermined form. This makes it possible to caulk the one end of the outer cylinder in two stages
Inada Tsuyoshi
Tsujimoto Yoshikazu
Briggs William
Jordan and Hamburg LLP
Toyo Tire & Rubber Co., Ltd
LandOfFree
Apparatus for assembling an anti-vibration device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for assembling an anti-vibration device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for assembling an anti-vibration device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2905101