JP3456393B2 - Press-in assembly equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for press-fitting a component into a shaft and coaxially assembling a retaining ring having flexibility such as a circlip and a snap ring.

[0002]

2. Description of the Related Art After a part is press-fitted into a shaft, when a snap ring or a snap ring made of a flexible member such as a circlip is coaxially assembled to prevent the press-fitted part from coming off or positioning, It consists of two steps: the process of assembling the parts to the shaft with the press fitting device, and the process of assembling the snap ring to the shaft and parts using the device that reduces or enlarges the outer diameter of the snap ring. A work in which predetermined parts are connected to a shaft is conveyed to a snap ring assembling process, and then a circlip or the like is assembled.

[0003]

However, in the above-described conventional press-fitting and assembling apparatus, a plurality of devices and steps are required for assembling the press-fitting component and the retaining ring on the same shaft, so that the operator needs to press-fit. Since a plurality of devices must be operated to assemble the retaining ring, there is a problem that the tact time increases and productivity decreases.

Therefore, the present invention has been made in view of the above problems, and an object of the present invention is to simultaneously press-fit parts and assemble a retaining ring in a single device and in one step.

[0005]

The first invention is the first invention in advance.
Positioning means for supporting a shaft on which the member is assembled; press-fitting means for press-fitting a second member engaged with the shaft;
Means for supporting a retaining ring made of a flexible member assembled to at least one of the first member and the second member, and the first member while reducing the outer diameter of the retaining ring in synchronization with the operation of the press-fitting means. An assembling means for assembling this retaining ring to at least one of the second members ,
The shaft has a fluid passage communicating with the pressure chamber.
In addition, this passage opens at the end of the shaft,
Is supported so that it can be expanded and contracted in the axial direction and is formed at both ends of the shaft.
It has a center shaft that engages with each of the formed center holes.
These center shafts are added to fluid passages that open at the end of the shaft.
An inspection means for supplying pressurized gas is provided.

In a second aspect based on the first aspect, the assembling means is provided with an insertion member for inserting a retaining ring into the first member after the press-fitting of the second member is completed.

A third aspect of the invention is the same as the first aspect of the invention, wherein the first and second members define a pressure chamber that expands and contracts according to fluid pressure.

[0008]

[0009]

Therefore, according to the first aspect of the present invention, when the second member is press-fitted into the shaft to which the first member is attached, the flexible member is attached to prevent the first or second member from slipping off or positioning. It becomes possible to assemble the retaining ring made of the same material at the same time as press-fitting, and it is possible to realize the work performed in the two steps and the apparatus as in the conventional example in one step and the apparatus. It is possible to suppress an increase in capital investment while significantly reducing time and improving productivity. Then, the fluid passage opened at the end of the shaft
By supplying pressurized gas to the passage from the positioning means side,
By checking the leakage of pressurized gas, press fitting and assembly work
It is possible to inspect at the same time as the end, improving productivity
It can be further improved.

According to a second aspect of the invention, after the press-fitting of the second member is completed, the retaining ring is inserted into the first member, so that, for example, the retaining ring is assembled to the first member and the second member is pulled out. In the case of stopping, by assembling the retaining ring at the same time as press fitting, it is possible to significantly reduce the takt time and improve productivity, while suppressing an increase in capital investment.

According to a third aspect of the invention, the first and second members define a pressure chamber that expands and contracts in accordance with the fluid pressure.
When defining the oil chamber of the V-belt type continuously variable transmission, by assembling the retaining ring at the same time as press fitting, the assembly process of the continuously variable transmission is simplified and the productivity is improved. You can

[0012]

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 16 show a CV in which parts are press-fitted into an input shaft and an output shaft of a V-belt type continuously variable transmission, and a circlip and a snap ring as a snap ring are assembled.
An example in which the present invention is applied to the T assembling apparatus 100 is shown.

1 to 3, the CVT assembling apparatus 10 is shown.
As shown in FIG. 7, the reference numeral 0 indicates that the rear cylinder 7 for defining the oil chamber is press-fitted into the input shaft 2 of the primary pulley 1 on the input side of the V-belt type continuously variable transmission, and the rear cylinder 7 ( The hydraulic pressure is supported by the primary pulley assembling device 30 for assembling the flexible circlip 9 that positions the second member) and the front cylinder 5 (first member) in the axial direction, and the secondary pulley 11 that is also the output side. The shield balance 17 defining the plunger 16 and the oil chamber is pressed into the output shaft 12, and the shield balance 17
(Second member) and secondary pulley assembling device 60 for assembling the snap ring 18 having flexibility to position the cylinder 15 (first member) in the axial direction.

First, the primary pulley 1 and the secondary pulley 11 which are works of the CVT assembling apparatus 100 will be described.

As shown in FIG. 7, the primary pulley 1 includes a fixed pulley 3 that rotates integrally with the input shaft 2,
The movable pulley 4 is disposed so as to face the fixed pulley 3 so as to form a V-shaped pulley groove, and can be displaced only in the axial direction of the input shaft 2. The movable pulley 4 is provided through a ball spline (not shown) or the like. It is connected with 2 in the direction of rotation.

On the movable pulley 4 side, a rear cylinder 7 press-fitted into the input shaft 2 and a CVT assembling apparatus 100 are also provided.
A front cylinder 5 connected to a rear cylinder 7 via a circlip 9 is arranged, and a plunger 10 connected to a movable pulley 4 and a piston 8 slide on the inner circumferences of the front cylinder 5 and the rear cylinder 7. It is accommodated as much as possible and drives the movable pulley 4 in the axial direction according to the hydraulic pressure supplied into the front cylinder 5 and the rear cylinder 7.

The CVT assembly device 100 after the plunger 10, the front cylinder 5, and the piston 8 are mounted on the movable pulley 4 in this order from the lower side in the figure, after being mounted on the pallet 101 shown in FIGS. Transported to C
The VT assembly apparatus 100 defines an oil chamber for driving the movable pulley 4 by connecting the rear cylinder 7 to the input shaft 2 and the front cylinder 5 to the rear cylinder 7 via a circlip 9. Is.

The piston 8 housed in the rear cylinder 7 is fitted into a step portion 4b provided on the outer circumference of a cylindrical portion 4a formed on the movable pulley 4. In the state before the rear cylinder 7 is press-fitted, the front cylinder 5 is axially displaceable between the piston 8 and the plunger 10. As shown in FIG.
As will be described later, the rear cylinder 7 and the front cylinder 5 are coupled in the rotational direction by the splines 6 formed on both the inner circumference protruding above and the outer circumference of the rear cylinder 7, and are formed on both splines 6. Groove 7a
(Supporting means) By assembling the circlip 9 to the 5a, the rear cylinder 7 and the front cylinder 5 are axially connected to each other to define two oil chambers, a front oil chamber and a rear oil chamber.

A bearing 22 is attached to the end of the input shaft 2 on the fixed pulley 3 side, and the pallet 101 is attached.
In the CVT assembly apparatus 100, the primary pulley 1 is supported via the bearing 22.

On the other hand, as shown in FIG. 11, the secondary pulley 11 is provided on the output shaft 12, and is provided with a fixed pulley 13 which rotates integrally with the output shaft 12, and a fixed pulley 13 which faces the fixed pulley 13. To form a V-shaped pulley groove and connect with the output shaft 12 in the rotational direction,
It is composed of a movable pulley 14 that can be displaced only in the axial direction,
The movable pulley 14 is coupled with the output shaft 12 in the rotational direction via a ball spline 19 provided between the output shaft 12 and the cylindrical portion 14a extending upward in FIG.
It is supported so as to be displaceable in the axial direction.

On the movable pulley 14 side, the outer periphery of the plunger 16 press-fitted to the output shaft 12 is slidably accommodated in the cylinder 15 press-fitted to the movable pulley 14 side via a seal 20, and the plunger 16 The movable pulley 1 according to the hydraulic pressure supplied to the oil chamber defined by the cylinder 15 and the cylinder 15.
When 4 is displaced in the axial direction, the groove width with the fixed pulley 13 is changed.

A shield balance 17 is further press-fitted into the upper side surface 16a of the plunger 16 press-fitted into the output shaft 12, and the peripheral edge portion of the shield balance 17 engages with the inner circumference of the cylinder 15 to shield the balance of the shield. 17
A ring groove 15a is formed on the inner circumference of the cylinder 15 above the position where it is engaged with the drawing, and a snap ring 18 is attached to this ring groove 15a, so that the shield balance 17 and the plunger 16 are connected to the cylinder 15 or the output shaft. 1
Prevent falling from 2. A spring 21 that constantly biases the movable pulley 14 toward the fixed pulley 13 is interposed between the inner circumference of the plunger 16 and the movable pulley 14.

A bearing 22 is attached to the end of the output shaft 12 on the fixed pulley 13 side, and the pallet 10 is attached.
1 and the CVT assembling apparatus 100, the secondary pulley 11 is supported via the bearing 22.
1 is a pallet 101 together with the primary pulley 1
It is placed on top and transported. The secondary pulley 11 includes the plunger 16 and the shield balance 117.
Further, the CVT assembling apparatus 100 is conveyed in a state where the snap ring 18 and the snap ring 18 are not assembled.

Next, the CVT assembling apparatus 100 will be described with reference to FIGS.
As shown in FIG. 3, the primary pulley assembling device 30 and the secondary pulley assembling device 60 are arranged in parallel, and the primary pulley 1 and the secondary pulley 11 placed on the pallet 101 are simultaneously press-fitted and assembled.

First, the primary pulley assembly device 30 will be described.

As shown in FIGS. 1, 2, 4, 5, and 7, the lower part of the primary pulley assembly device 30 penetrates through the pallet 101 and can be expanded and contracted in the vertical direction (Z-axis direction in the drawing). A work support member 31 and a lower center shaft 32 are provided, and the work support member 31 and the lower center shaft 32 are driven in the vertical direction by an actuator (not shown).

The primary pulley 1 conveyed by the pallet 101 together with the secondary pulley 11 is vertically supported on the pallet 101 and positioned so that the input shaft 2 and the lower center shaft 32 are coaxial with each other. .

In this state, the work support member 31 and the lower center shaft 32 are synchronously raised to move the pallet 101.
Bearing 2 of the primary pulley 1 supported vertically above
2 is supported by the work supporting member 31, and the lower center shaft 32 is engaged with the center hole provided at the lower end of the input shaft 2,
While positioning the primary pulley 1 on the axis of the lower center shaft 32, the primary pulley 1 is supported at a predetermined position raised from the pallet 101.

On the upper part of the primary pulley assembling device 30, a press-fitting shaft 35 and an upper center shaft 33, which are coaxially opposed to the lower center shaft 32, are coaxially arranged, and an actuator 36 is formed of an air cylinder or the like. It is supported by 34 so that it can extend and contract in the vertical direction.

The press-fitting shaft 35 is formed of a hollow member, and the upper center shaft 33 is retractably accommodated in the inner circumference. The press-fitting shaft 35 has its upper end coupled to the actuator 36 and is driven in the vertical direction, so that the pressing member 35 a (press-fitting means) formed at the lower end of the press-fitting shaft 35 can come into contact with and separate from the upper end side of the input shaft 2. Become.

As shown in FIG. 2, the upper center shaft 33, which is slidably accommodated in the inner circumference of the press-fitting shaft 35, has an actuator 36 through an opening formed in the side surface of the press-fitting shaft 35. The lower end of the upper center shaft 33 is connected to the rod 34a of the actuator 34 which is disposed in parallel with the lower end of the upper center shaft 33 so as to project from the pressing member 35a in the vertical direction. Protrudes from the pressing member 35a at the lower end of the press-fitting shaft 35 and engages with the center hole formed at the upper end of the input shaft 2 whose lower ends are supported by the work supporting member 31 and the lower center shaft 32.

Therefore, the center holes formed at both ends of the input shaft 2 are held between the lower center shaft 32 and the upper center shaft 33,
The axis of the input shaft 2 is positioned coaxially with the press-fitting shaft 35, and the work support member 31 supports the force associated with the press-fitting through the bearing 22 provided at the lower end of the input shaft 2.

Next, as shown in FIG. 8, in the primary pulley 1 placed on the pallet 101, the movable pulley 4 is coupled to the input shaft 2 in the rotational direction via a ball spline (not shown) in the previous step. On the other hand, the movable pulley 4 is supported so as to be displaceable in the axial direction, and the movable pulley 4 has a front cylinder 5, a plunger 10, and a primary pulley assembly device 3.
Since the piston 8 of the rear cylinder 7 assembled with 0 is in the state assembled in the previous step and the front cylinder 5 is axially displaceable with respect to the input shaft 2,
It is carried into the primary pulley assembling device 30 while being in contact with the plunger 10 side.

In order to connect the front cylinder 5 to the rear cylinder 7 via the circlip 9 while press-fitting the rear cylinder 7 into the input shaft 2, and to connect the front cylinder 5 and the rear cylinder 7 to the input shaft 2, Plunger 1
It is necessary to raise the front cylinder 5 seated on the 0 side to a predetermined assembly position. Therefore, the primary pulley assembly device 30 includes a cylinder support portion 37 that drives the front cylinder 5 supported by the work support member 31 up and down.
Is provided.

As shown in FIGS. 2 and 5, the cylinder support portion 37 includes a pair of support arms 38, 38 that engage with the lower end of the front cylinder 5, and these support arms 38 along the Y-axis direction in the drawings. A horizontal actuator 40 for driving in the horizontal direction and a vertical actuator 39 for vertically moving the horizontal actuator 40 and the support arm 38. As shown by the solid lines in FIGS. 2 and 5, when the horizontal actuator 40 is in the contracted state. The support arm 38 is pulled toward the primary pulley assembling device 30 side, and when the horizontal actuator 40 is in the extended state, the support arm 38 is displaced toward the primary pulley 1 as shown by the broken line in the figure, and the upper portion of the support arm 38 is moved to the front cylinder. Engage the lower end of 5.

As shown in FIGS. 7 and 8, the support arm 38
Has an L-shaped cross section, and a step portion that engages with the front cylinder 5 is provided at the upper portion of the inner periphery of the movable pulley 4 at the lower portion of the inner periphery.
Is formed so as to engage with the peripheral edge of the support arm 38 in the vertical direction, and when the lifting actuator 39 is driven in the contraction direction, the support arm 38 is
7, the lower part of the support arm 38 lifts the movable pulley 4, and the seated front cylinder 5 is lifted and pulled away from the plunger 10 side, as shown in FIGS. As described above, the front cylinder 5 and the movable pulley 4 are held at positions with a predetermined distance in the axial direction.

Next, as shown in FIG. 7, the pressing member 35a formed at the lower end of the press-fitting shaft 35 is formed in a cylindrical shape,
While press-fitting by contacting the rear cylinder 7 at the lower end surface,
The inner circumference is in sliding contact with the inner circumference of the input shaft 2.

A flange 35b is formed above the pressing member 35a , and a circlip holding portion 41 for assembling the circlip 9 at the same time as press-fitting is supported by the flange 35b, and at a position facing the circlip holding portion 41. , A circlip guide 43 that supports the circlip 9 and guides it to the assembly position (assembly means)
Is provided.

First, the circlip retainer 41 is provided with a plurality of shaft-shaped circlip retainers 42 which penetrate the flange 35b and can be displaced in the vertical direction. At the upper end of the circlip retainer 42, there are bolts, washers, etc. Is provided to prevent the spring 35 from falling off from the flange 35b , a flange is formed in the middle of the circlip retainer 42, and a spring interposed between this flange and the lower surface of the flange 35b of the press-fitting shaft 35. The circlip retainer 42 is always urged downward by 42b.

On the other hand, the circlip guide 43 is formed of an annular member having an inner diameter slightly larger than the inner diameter of the spline 6 of the front cylinder 5, and is arranged in parallel with the press-fitting shaft 35 as shown in FIGS. Actuator 46
It is driven up and down in the vertical direction.

The inner circumference of the circlip guide 43 is shown in FIG.
The circlip 9 is placed on the sloping surface 44, and the circlip 9 is placed on the sloping surface 44. The penetrating portion that allows the circlip pressing 42 to penetrate is provided at a position facing the circlip pressing 42. 43a is formed.

On the lower surface of the circlip guide 43, an abutting portion 45 that can come in contact with and separate from the upper peripheral edge of the front cylinder 5 is provided.

Therefore, when setting the circlip 9, as shown in FIG. 8, the actuator 46 is extended and driven so that the circlip guide 43 is brought into contact with the front cylinder 5 and then the circlip 9 is moved to the rear. Cylinder 7
Then, when the press-fitting shaft 35 is lowered, the lower end of the circlip retainer 42 urges the upper surface of the circlip 9 by the spring 42b, and, for example, as shown in FIG. If arranged at intervals, the circlip 9 that decreases in diameter while descending along the inclined surface 44 is evenly pressed by the plurality of circlip retainers 42 and maintains a state parallel to the XY plane in the figure. Meanwhile, it is guided by the groove portion 5a of the spline 6 provided on the inner circumference of the front cylinder 5.

The operation of the primary pulley assembling apparatus 30 having the above structure will be described with reference to FIGS.

As shown in FIGS. 1 and 2, the primary pulley 1
When the pallet 101 on which is mounted is positioned at a predetermined position by a stopper (not shown) or the like, the work supporting portion 31 and the lower center shaft 32 are raised to hold the primary pulley 1 after raising it to a predetermined press-fitting position.

Next, the cylinder support portion 37 starts to operate, and as shown in FIG. 5, the support arm 38 is displaced in the Y-axis direction by the extension drive of the horizontal actuator 40 and inserted below the front cylinder 5. After that, when the lifting actuator 39 is driven to raise the support arm 38,
As described above, the front cylinder 5 seated on the plunger 10 rises, and as shown in FIG. 8, it rises and is held with the movable pulley 4 to a predetermined assembly position. This mounting position is set to a position where the splines 6 of the front cylinder 5 and the rear cylinder 7 can mesh with each other in a state where the rear cylinder 7 is placed on the upper end of the input shaft 2.

In this state, when the actuator 46 is driven to lower the circlip guide 43 so that the contact portion 45 provided on the lower surface is brought into contact with the peripheral edge of the upper surface of the front cylinder 5, the spline of the inner circumference of the front cylinder 5 is formed. Since a taper portion is formed on the upper part of 6, the circlip guide 4
It is possible to form the guide surface of the circlip 9 from the inclined surface 44 of No. 3 to the spline 6 with almost no step.

Next, the operator coaxially mounts the rear cylinder 7 on the upper end of the input shaft 2 and the circlip 9
Is set in the groove 7a provided in the spline 6 of the rear cylinder 7.

Then, as shown in FIG. 9, the actuator 34 is extendedly driven to lower the upper center shaft 33 and engage the center hole provided at the upper end of the input shaft 2 to press-fit the input shaft 2. While positioning the shaft 35 at the coaxial position, the actuator 36 is driven to lower the press-fitting shaft 35 and press the rear cylinder 7 into the input shaft 2 by the pressing member 35a, while the rear cylinder 7 is placed inside the front cylinder 5. Insert into the formed spline 6.

At this time, the circlip 9 fitted into the groove portion 7a of the rear cylinder 7 is displaced downward while the outer diameter is reduced by sliding the outer periphery of the circlip 9 onto the inclined surface 44 of the circlip guide 43, At the time of this displacement, since the upper surface of the circlip 9 is biased by the circlip retainer 42, the circlip 9 smoothly reduces its outer diameter while preventing upward warping and dropping from the groove 7a. be able to.

When the press-fitting by the pressing member 35a is further continued, the lower surface of the inner peripheral surface of the rear cylinder 7 is fixed to the input shaft 2
The press-fitting is completed by being locked to the stepped portion 2a of the circlip 9, and at this time, the circlip 9 transferred from the inclined surface 44 of the circlip guide 43 to the spline 6 on the inner circumference of the front cylinder 5
When reaching the position of the groove portion 5a of the front cylinder 5, the outer diameter is enlarged to restrict the axial displacement of the front cylinder 5 and the rear cylinder 7, and the front cylinder 5 is moved to a predetermined step 2a of the input shaft 2a. It binds to the position.

In this way, when the rear cylinder 7 is press-fitted into the input shaft 2, the circlip 9 can be assembled at the same time, and the work performed in the two steps and the apparatus in the conventional example can be performed. It is possible to realize with one process and one device, and it is possible to suppress the increase in capital investment while significantly reducing the tact time and improving the productivity.

After the press-fitting and assembling are completed, each actuator is returned to the initial position and the operation is completed.

Next, the output shaft 12 of the secondary pulley 11
A secondary pulley assembling device 60 will be described in which the plunger 16 is press-fitted, the shield balance 17 is press-fitted to the outer periphery of the plunger 16, and the snap ring 18 as a retaining member of the shield balance 17 is assembled to the inner periphery of the cylinder 15.

As shown in FIG. 1, FIG. 3, FIG. 4, FIG. 6 and FIG. 11, the secondary pulley assembling apparatus 60 has a lower portion which can extend and contract in the vertical direction (Z-axis direction in the drawing) through the pallet 101. A work support member 61 and a lower center shaft 62 are provided, and these work support member 61 and the lower center shaft 62 are driven in the vertical direction by an actuator (not shown) as in the primary pulley assembly device 30.

The secondary pulley 1 conveyed by the pallet 101 simultaneously with the primary pulley 1.
1 is vertically supported on the pallet 101 and positioned so that the output shaft 12 and the lower center shaft 62 are coaxial with each other.

In this state, the work support member 61 and the lower center shaft 62 are synchronously raised to move the pallet 101.
The bearing 22 of the secondary pulley 11 which is vertically supported above is supported by the work supporting member 61, and the lower center shaft 62 is engaged with the center hole provided at the lower end of the output shaft 12, so that these secondary pulley 11 The lower center shaft 62
The secondary pulley 11 is supported at a predetermined position raised from the pallet 101 while being positioned on the axis line of.

On the upper part of the secondary pulley assembly device 60, a press-fit shaft 65 and an upper center shaft 63, which are coaxially opposed to the lower center shaft 62, are coaxially arranged, and an actuator 66 constituted by an air cylinder or the like is provided. It is supported by 64 so as to be extendable and contractible in the vertical direction.

The press-fitting shaft 65 is formed of a hollow member, and the upper center shaft 63 is retractably accommodated in the inner circumference. The press-fitting shaft 65 has its upper end coupled to the actuator 66 and is driven in the vertical direction, so that the pressing member 80 formed at the lower end of the press-fitting shaft 65 can come into contact with and separate from the upper end side of the output shaft 12.

The upper center shaft 63, which is slidably accommodated in the inner periphery of the press-fitting shaft 65 in the axial direction, has an actuator 36 through an opening formed on the side surface of the press-fitting shaft 65, as shown in FIG. The lower end of the upper center shaft 63 is connected to a rod 64a of an actuator 64 which is arranged in parallel with the actuator 64, and the lower end of the upper center shaft 63 is driven so as to project from the pressing member 80 in the vertical direction. Of the output shaft 1 protruding from the pressing member 80 at the lower end of the press-fitting shaft 65 and supported at its lower end by the work supporting member 61 and the lower center shaft 62.
It engages with the center hole formed at the upper end of 2.

Therefore, the center holes formed at both ends of the output shaft 12 are held between the lower center shaft 62 and the upper center shaft 63, and the axis of the output shaft 12 is positioned coaxially with the press-fitting shaft 65. The work supporting member 61 supports the force associated with the press-fitting via the bearing 22 provided at the lower end of the work piece 12.

Next, in the secondary pulley 11 placed on the pallet 101, as shown in FIG. 11, in the previous step, the movable pulley 14 is coupled with the output shaft 12 in the rotational direction via the ball spline 19. On the other hand, the movable pulley 14 is supported so as to be displaceable in the axial direction, and a cylinder 15 and a spring 21 housed in an oil chamber are attached to the movable pulley 14 in the previous step.

While press-fitting the plunger 16 onto the output shaft 12, the outer periphery of the output shaft 12 is brought into sliding contact with the inner periphery of the cylinder 15,
Further, after the shield balance 17 is press-fitted into the upper side surface 16a of the plunger 16 while the outer periphery is engaged with the inner periphery of the cylinder 15, the shield 15 is formed on the inner periphery of the cylinder 15 above the position where the shield balance 17 is engaged. Ring ring 1
In order to assemble the snap ring 18 to the 5a, the secondary pulley assembling device 60 positions the shield balance 17 at the coaxial position with the output shaft 12 and also guides the shield balance 17 to the press-fitting position into the plunger 16 and the snap ring 18. And a snap ring support portion 70 for guiding the guide ring to a predetermined mounting position.
A snap ring insertion member 85 for inserting 8 into the ring groove 15a is provided.

First, as shown in FIG. 11, a flange 65a for supporting the shield balance holder 82 and the snap ring assembling portion 70 is formed at the lower end of the press-fitting shaft 65, and extends downward from this flange 65a. Cylindrical part 6
At the lower end of 5b, a pressing member 80 formed of a cylindrical member is provided.
Is fixed, the upper center shaft 63 is fixed to the cylindrical portion 65b.
Also, it is supported through the inner periphery of the pressing member 80 so as to be relatively displaceable in the axial direction.

From the outer periphery of the lower end of the pressing member 80, there is formed a cylindrical portion 81 that engages with the upper side surface 16a of the plunger 16 on the inner periphery and presses the shield balance 17 on the lower end surface. The end face of the inner circumference of the portion 81 is pressed into contact with the upper end face of the plunger 16.

Next, at the peripheral edge of the flange 65a, a bolt 8 which penetrates the flange 65a and is relatively displaceable in the axial direction.
A plurality of 6 are provided, and a snap ring holder 7 that constitutes a snap ring support portion 70 is provided at the lower ends of these bolts 86.
1 (supporting means) are connected.

The snap ring holder 71 is composed of a cylindrical member, the inner diameter of which is set to be substantially equal to the inner diameter of the upper end portion of the cylinder 15, and a spring 87 is interposed between the upper end surface and the flange 65a. Holder 71
Is always urged downward. When the lower end of the snap ring holder 71 comes into contact with the work, that is, the upper end surface of the cylinder 15, the bolt 86 is displaced relative to the flange 65a in the axial direction. Press-fit shaft 65 on the upper end surface
Prevents pressing force from being applied.

At the lower portion of the inner circumference of the snap ring holder 71, there is a tapered portion 7 whose inner diameter gradually increases toward the lower end.
2 is formed, and a claw portion 73 on which the snap ring 18 is mounted is provided in the middle of the tapered portion 72 so as to project toward the inner peripheral side.

As shown in FIGS. 1 and 12, a notch portion 71a for engaging with an outer diameter reducing portion 78 of a snap ring guide 75, which will be described later, is formed in a spline shape on the outer periphery of the snap ring holder 71. The notch portion 71a and the claw portion 7 are formed on the lower portion of the snap ring holder 71.
Cylindrical parts having 3 formed on the inner circumference are alternately formed.

Next, between the outer circumference of the cylindrical portion 65b of the flange 65a and the snap ring holder 71, a shield balance holder 82 for supporting the shield balance 17 is arranged.

The shield balance holder 82 is formed of a cylindrical member, is slidably in contact with the cylindrical portion 65 of the flange 65a at the inner peripheral upper portion thereof, and is relatively displaceable in the axial direction with respect to the press-fitting shaft 65. By coupling the spring 83 coupled to the lower surface of the flange 65a to the flange 65a, the shield balance holder 82 is always urged downward.
Hangs down.

The cross-sectional shape of the shield balance holder 82 is, as shown in FIG. 11, provided with a predetermined surface on the inner peripheral lower portion that engages from the upper portion of the shield balance 17 to the side surface and the outer peripheral upper surface. Screwed bolt 8
By projecting 4 toward the inner circumference, the shield balance 17 engaged with the lower portion of the inner circumference is suspended. The outer diameter of the shield balance holder 82 is set so as to form a predetermined gap with the snap ring holder 71, and a snap ring insertion member 85 described later is interposed in this gap. As shown in FIG. 3, the free length of the spring 83 is set so that the lower side surface of the shield balance holder 82 is exposed below the lower end of the snap ring holder 71 when the shield balance 17 is suspended. .

Therefore, when the press-fitting shaft 65 contracts, the shield balance holder 82 projects from the lower end of the snap ring holder 71 as shown in FIG. 12, and the bolt 84 is loosened to engage the shield balance 17 with the inner circumference. By tightening the bolt 84 from
After that, the shield balance 17 is press-fitted into the plunger 16 by driving the press-fitting shaft 65 to extend. At this time, the peripheral edge of the shield balance 17 is at the spring 8
Since it is pressed by the shield balance holder 82 biased by 3, the ring groove 1 formed in the upper part of the inner circumference of the cylinder 15
It is possible to engage with the inner circumference of the cylinder without being caught by 5a.

Next, the snap ring 18 supported by the snap ring support portion 70 is attached to the ring groove 1 of the cylinder 15.
The annular snap ring guide 75 (assembling means) that guides to 5a is axially displaceable relative to the press-fitting shaft 65, engages with the outer circumference of the snap ring holder 71, and extends from the cutout portion 71a to the snap ring holder. An outer diameter reducing portion 78 protruding to the inner periphery of 71 and a cylindrical portion 79 that engages with the outer periphery of the snap ring holder 71 having the claw portion 73 are provided, and as shown in FIG. It is supported by an upright actuator 74, and is driven in the vertical direction such that its lower end can come into contact with and separate from the upper end of the cylinder 15 of the secondary pulley 11.

In the snap ring guide 75, at the position where the outer diameter reducing portion 78 projecting to the inner circumference is damaged, a taper portion 76 is formed whose inner diameter decreases as going downward from the upper end of the inner circumference. The lower end of the outer diameter reduction part 7
Connect to the top of 8.

As shown in FIG. 12, the inner diameter of the outer diameter reducing portion 78 is set to be substantially equal to the inner diameter of the upper end of the inner periphery of the cylinder 15, and the snap ring 18 moved to the outer diameter reducing portion 78 is smoothly moved into the ring groove 15a. Is formed to guide to. A step portion 77 that vertically engages with the upper end portion of the cylinder 15 is formed on the inner periphery of the lower end of the snap ring guide 75.

Therefore, as shown in FIG. 12, the actuator 74 is extendedly driven to lower the snap ring guide 75 until the step 77 is locked to the upper end of the cylinder 15, and then the steps shown in FIGS. As shown, press fit shaft 6
When 5 is moved down and the snap ring holder 71 is inserted into the inner circumference of the snap ring guide 75, the snap ring 18 placed on the claw portion 73 on the inner circumference of the snap ring holder 71 becomes the taper portion 76 of the snap ring guide 75.
15, the taper portion 72 of the snap ring holder 71 that descends lowers the outer diameter while decreasing the outer diameter, and as shown in FIG. It rides on the outer diameter reduction unit 78 and stops.

Next, a snap ring inserting member 85 for inserting the snap ring 18 supported by the outer diameter reducing portion 78 of the snap ring guide 75 into the ring groove 15a on the inner circumference of the cylinder 15 is shown in FIGS. As described above, the shield balance holder 82 and the snap ring guide 75 and the snap ring holder 71 are interposed in the gap, and are formed of a cylindrical member that is axially displaceable relative to the press-fitting shaft 65 side and the snap ring guide 75. Then, as shown in FIG. 1, it is connected to the assembly actuator 90 arranged in the vertical direction via the bracket 91 connected to the upper end portion.

Therefore, as shown in FIG. 15, the snap ring 18, which has stopped by riding on the outer diameter reducing portion 78 of the snap ring guide 75, moves downward as shown in FIG. 16 when the assembling actuator 90 is extended. Is pressed against the lower end of the snap ring insertion member 85,
The outer diameter reducing portion 78 moves downward along the outer diameter reducing portion 78.
It is inserted into the ring groove 15a after being transferred to the upper end of the inner circumference of the cylinder 15.

The operation of the secondary pulley assembling apparatus 60 having the above configuration will be described with reference to FIGS. 11 to 16.

As shown in FIGS. 1 and 3, the secondary pulley 1
When the pallet 101 on which 1 is placed is positioned at a predetermined position by a stopper or the like (not shown), the work supporting portion 61 and the lower center shaft 62 are raised to hold the secondary pulley 11 after raising it to a predetermined press-fitting position.

Next, as shown in FIG. 12, while the plunger 16 is coaxially placed on the upper end of the output shaft 12,
The shield balance 17 is engaged with the inner circumference of the shield balance holder 82, and the bolt 84 shown in FIG.
Is tightened, and the shield balance 17 is hung on the shield balance holder 82. Then, after the snap ring 18 is placed on the claw portion 73 protruding from the inner circumference of the snap ring holder 71, the actuator 74 shown in FIG. Keep it in contact with the top edge.

Then, as shown in FIG. 13, the actuator 64 is extended and driven to lower the upper center shaft 63,
By engaging with the center hole provided at the upper end of the output shaft 12, the output shaft 12 is positioned at the coaxial position of the press-fitting shaft 65, and the actuator 66 is driven to lower the press-fitting shaft 65 and lower the pressing member 80. Let

The shield balance 1 suspended from the shield balance holder 82 by the lowering of the pressing member 80.
7 is pressed by the cylindrical portion 81 and press-fitted into the upper side surface 16 a of the plunger 16.

Further, when the actuator 66 is driven to lower the press-fitting shaft 65, as shown in FIG. 14, after the press-fitting of the shield balance 17 is completed, the lower end surface of the pressing member 80 causes the plunger 16 to move to the output shaft 12. Then, as shown in FIG. 15, the pressing member 80 descends until the lower surface of the inner peripheral surface of the plunger 16 is locked by the step portion 12a of the output shaft 12.

When the plunger 16 is pressed into the stepped portion 12a and the press-fitting is completed, the outer circumference of the plunger 16 is slidably contacted with the inner circumference of the cylinder 15 via the seal 20 and is supported on the press-fitting shaft 65 side. The shield balance holder 82 biased by the spring 83 engages the outer circumference of the shield balance 17 with the inner circumference of the cylinder 15 below the ring groove 15a.

On the other hand, as the press-fitting shaft 65 descends, the snap ring guide holder 71 supported on the press-fitting shaft 65 side also descends, and as shown in FIGS. 14 and 15, the snap ring holder 71 is moved to the snap ring guide. When it is inserted into the inner circumference of the snap ring guide 75, the snap ring 18 placed on the claw portion 73 on the inner circumference of the snap ring guide 75 becomes
15, the taper portion 72 of the snap ring holder 71 that descends lowers the outer diameter while decreasing the outer diameter, and as shown in FIG. It rides on the outer diameter reduction unit 78 and stops.

In this state, as shown in FIG. 16, when the assembling actuator 90 is extended and driven, the snap ring 18 is pressed by the lower end of the descending snap ring inserting member 85, and along the outer diameter reducing portion 78. After moving downward and riding on the upper end of the inner circumference of the cylinder 15 from the outer diameter reducing portion 78, it is inserted into the ring groove 15a.

After the press-fitting and the assembling of the snap ring 18 are completed, each actuator is returned to the initial position and the operation is completed. The shield balance 17 is supported by the shield balance holder 82 by the bolts 84. However, after the press fitting, the coupling force by the press fitting is larger than the holding pressure by the bolts 84. Therefore, if the press fitting shaft 65 is raised. , The shield balance holder 82 is the press-fitted shield balance 1
It is possible to easily return to the initial position after exiting from 7.

In this way, by simply lowering the press-fitting shaft 65, the snap ring 18 can be assembled by one device and process while press-fitting the plunger 16 and the shield balance 17 to the output shaft 12 side at the same time. As a result, it is possible to significantly reduce the takt time and improve productivity, while suppressing an increase in capital investment.

Then, the pair of primary pulley 1 and secondary pulley 1 placed on the pallet 101.
The press-fitting and assembling work to 1 is performed by simultaneously operating the primary pulley assembling device 30 and the secondary pulley assembling device 60 to press-fit parts into the pair of primary pulley 1 and secondary pulley 11 and assembling the snap ring at the same time. Thus, it is possible to further improve productivity.

Further, a passage (not shown) for supplying compressed air (pressurized gas) is provided in the inner circumference of the lower center shafts 32, 62,
For example, as shown in FIG. 7, after the assembly is completed, compressed air is supplied to the oil passage 50 of the primary pulley 1 from the side of the lower center shaft 32, and if there is no air leakage between the cylinder and the plunger, etc., press fit accurately. Also, it can be determined that the assembling is completed, the assembling and the completion inspection can be performed by the same device, and the productivity can be further improved.

[Brief description of drawings]

FIG. 1 is a front view of a CVT assembling apparatus showing an embodiment of the present invention.

FIG. 2 is a left side view and a sectional view of a main part of the same.

FIG. 3 is a right side view and a sectional view of relevant parts.

4 is a sectional view taken along the line AA of FIG.

5 is a sectional view taken along the line BB of FIG.

6 is a cross-sectional view taken along the line CC of FIG.

FIG. 7 is a cross-sectional view of essential parts of the primary pulley assembly device.

FIG. 8 is a half cross-sectional view of the main part of the primary pulley assembling apparatus, showing a ready state for press fitting and assembling.

FIG. 9 is a half sectional view of the main part of the primary pulley assembling apparatus, showing the manner of press fitting and starting of assembling.

FIG. 10 is a half sectional view of the main part of the primary pulley assembling apparatus, showing the state of press fitting and assembling completion.

FIG. 11 is a cross-sectional view of a main part of a secondary pulley assembly device.

FIG. 12 is a half cross-sectional view of a main part of the secondary pulley assembling apparatus, showing a state of preparation for press-fitting and assembling.

FIG. 13 is a half sectional view of the main parts of the secondary pulley assembling apparatus, showing the manner of press fitting and starting of assembling.

FIG. 14 is a half sectional view of a primary pulley assembling apparatus, showing a state during press fitting and assembly.

FIG. 15 is also a half cross-sectional view of a main part of the secondary pulley assembling apparatus, showing a state of completion of press-fitting and an assembling process.

FIG. 16 is a half cross-sectional view of the main part of the primary pulley assembling apparatus, showing the state of press fitting and assembling completion.

[Explanation of symbols] 1 primary pulley 2 input axes 2a step 3 fixed pulley 4 Movable pulley 5 front cylinder 5a groove 6 splines 7 Rear cylinder 7a groove 9 Circlip 10 Plunger 11 Secondary pulley 12 Output shaft 12a step 13 fixed pulley 14 Movable pulley 14a cylindrical part 15 cylinders 15a ring groove 16 Plunger 17 Shield balance 18 snap ring 30 Primary pulley assembly device 31 Work support section 32 Lower center axis 33 Upper center axis 34 Lifting actuator 34a rod 35 Press-fit shaft 35a pressing member 35b flange 36 actuators 37 Cylinder support 38 Support arm 39 Lifting actuator 40 horizontal actuator 42 Circlip holder 43 Circlip holder 44 Tapered part 45 Contact part 46 actuator 60 Secondary pulley assembly device 61 Work support 62 Lower center axis 63 Upper center axis 64 lifting actuator 65 Press fit shaft 65a pressing member 66 actuator 70 Snap ring support 71 Snap ring holder 72 Tapered part 73 Claw 74 Actuator 75 Snap ring guide 76 Tapered part 78 Outer diameter reduction section 80 Pressing member 82 Shield balance holder 84 volts 85 Snap ring insertion member 90 Assembled actuator 100 CVT assembly equipment 101 pallets

Continuation of the front page (56) References JP-A-3-184727 (JP, A) JP-A-6-297262 (JP, A) JP-A-11-6549 (JP, A) JP-A-7-133853 (JP , A) JP 7-77479 (JP, A) Actually open 4-42329 (JP, U) Actually open 5-88838 (JP, U) Actually open 63-131326 (JP, U) Actually open 60-175539 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B23P 19/00-21/00 F16H 9/18 G01M 3/26

Claims (3)

(57) [Claims] 1. A positioning means for supporting a shaft assembled with a first member in advance, a press-fitting means for press-fitting a second member engaged with the shaft, and at least one of the first member and the second member. And a means for supporting a retaining ring made of a flexible member, which is mounted on the at least one of the first member and the second member while reducing the outer diameter of the retaining ring in synchronization with the operation of the press-fitting means. An assembling means for assembling a retaining ring , wherein a fluid passage communicating with the pressure chamber is formed in the shaft.
At the same time, this passage opens at the end of the shaft, and the positioning means is supported so as to be expandable and contractible in the axial direction,
Center holes formed at both ends of the shaft are engaged with each other.
Center shafts, and these center shafts have openings at the ends of the shafts.
A test means for supplying pressurized gas to the fluid passage must be provided.
Press-fitting assembly device characterized by and. 2. The press-fitting and assembling apparatus according to claim 1, wherein the assembling means is provided with an inserting member for inserting the retaining ring into the first member after the press-fitting of the second member is completed. 3. The first and second members define a pressure chamber that expands and contracts according to fluid pressure.
Press-fitting assembly device described in.