JP2553834Y2 - Work press-in device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work press-fitting device suitable for fitting a bearing and an adapter to a shaft-like work used in, for example, an automobile transmission.

[0002]

2. Description of the Related Art A manual transmission of an automobile contains a large number of gears provided on a main shaft and a counter shaft inside a gear box.
Each of the shafts is rotatably supported by a bearing. The inner ring of the bearing is fitted to the shaft, and the outer ring of the bearing is inserted into a hole provided in the adapter.

For example, in a work assembly 1 shown in FIG. 5, a shaft-shaped work 2 includes an inner race 4 of a bearing 3.
Is press-fitted from above in the figure. The hole 7 of the adapter 6 is fitted to the outer ring 5 of the bearing 3. A snap ring 9 is provided in an annular groove 8 provided in the outer race 5. The adapter 6 is mounted on a gear box (not shown). An example of the work 2 is a transmission counter shaft.

In such a work assembly 1, the work 2 is press-fitted to a position where a flange 11 provided at an intermediate portion in the axial direction abuts against an end face of the bearing 3. Further, it is necessary to press-fit the adapter 6 to a position where the adapter 6 comes into contact with the snap ring 9. These press-fitting operations are performed by mechanical force using a press-fitting device using a hydraulic cylinder.

A conventional press-fitting device 1 schematically shown in FIG.
5 is a fixed support seat 16 for supporting the bearing 3 and a press fitting 17 for inserting the work 2 from above the bearing 3.
A pallet 18 on which the adapter 6 is placed;
A work guide 19 and the like are provided on the upper surface side. The work guide 19 is in contact with the lower end 20 of the press fitting 17. The press fitting 17 is driven by a hydraulic cylinder (not shown). The pallet 18 is urged to a predetermined height by a push-up spring 21 so as to be able to descend within a predetermined stroke range when receiving a load from above.

When the work 2 and the adapter 6 are simultaneously press-fitted into the bearing 3 using the press-fitting device 15, the press-in fitting 17 is lowered by a predetermined amount in the direction of arrow A in the figure. By doing so, the upper end surface 2a of the work 2 is
Is pushed in the direction A, and the flange 11 of the work 2 is
The work 2 is press-fitted to a position corresponding to the upper end face of the work guide 19, and the work guide 19 is
Is pushed in the direction of arrow B, whereby the hole 7 of the adapter 6 is fitted to the outer ring 5 of the bearing 3. In this case, since the adapter 6 and the pallet 18 descend in the direction of arrow B, the displacement in this direction is absorbed by the push-up spring 21.

[0007]

The conventional press-fitting device 1 described above.
5, when the work 2 and the adapter 6 are pressed into the bearing 3, the work guide 19 is pushed down by the same stroke as the downward stroke of the press fitting 17. For this reason, depending on the dimensional accuracy of the workpiece 2 and the bearing 3 in the axial direction, the variation in the thickness of the adapter 6, and the like, the flange 11 is
When the work 2 is press-fitted until it comes into contact with the snap ring 9, the lower surface 6a of the adapter 6 cannot reach the snap ring 9, and poor adhesion between the adapter 6 and the snap ring 9 may occur.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a work press-fitting device which can press-fit a work and an adapter into a bearing at the same time, and which can surely make an adapter close to a snap ring when the work is pressed into a predetermined position. Is to do.

[0009]

The work press-fitting device according to the present invention, which has been developed to achieve the above object, has a shaft-shaped work inserted into the inner peripheral side of a bearing provided with a snap ring on the outer peripheral portion. A work press-fitting device for fitting an adapter to an outer peripheral side of a pallet, a pallet on which the adapter is mounted, a support seat for supporting a lower end surface of the bearing, and a state in which the support seat is moved up and down and actuated to the ascending side. A lifting cylinder that pushes up the bearing to a position higher than the pallet, a press-fit fitting provided above the work facing the upper end surface of the work, and a press-fit fitting that moves up and down and moves downward. A press-fit cylinder that contacts the upper end surface of the work in an actuated state and inserts the work to a predetermined position with respect to a bearing; A movable head relatively movable provided and a lower end portion extending toward the adapter in the vertical direction,
A spring is provided for urging the movable head in a direction of pressing down, and a work guide is interposed between a lower end surface of the movable head and an upper surface of the adapter.

[0010]

[Function] When setting a work in the device of the present invention, the support seat is lowered by the lift cylinder,
The press fitting is raised to a predetermined height by a press cylinder. Then, the adapter is placed at a predetermined position on the pallet, and the work supported by the work guide is set thereon. This work is inserted into the hole of the adapter. After that, by raising the support seat by the lift cylinder, the bearing is pushed up while being supported from below, and the press fitting is lowered by the press cylinder from above the work.

With this arrangement, the work is pressed into the bearing to the predetermined axial position, and the work guide is pushed by the lower end of the movable head. Holes are fitted to the outer peripheral portion of the bearing. Since the movable head is pressed downward by the elastic force of the spring, the elastic force of the spring is transmitted to the adapter via the work guide, so that the adapter is completely press-fitted to a position close to the snap ring.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The work press-in device 30 shown in FIG. 1 is for performing press-in work of the work assembly 1 (see FIG. 5), and includes a pallet 31 on which the adapter 6 is mounted. The pallet 31 is intermittently moved in the horizontal direction at a predetermined index by a drive mechanism (not shown). A part of the pallet 31 is provided with a through hole 32 large enough to insert the lower part of the work 2 and the bearing 3. The pallet 31 is supported by a pallet lifter (not shown).

The lower unit 3 is provided on the lower side of the pallet 31.
5 are provided. The lower unit 35 is a pallet 3
A support seat 36 located immediately below the first through hole 32, and a hydraulic lift cylinder 3 for driving the support seat 36 up and down.
7 and a sensor 39 for detecting the operating height of the cylinder 37 relative to the rod 38.

As shown in FIG. 3, when the rod portion 38 of the cylinder 37 is raised to the rising end, the support seat 36 is pushed to a position where the bearing 3 on the support seat 36 floats on the upper surface side of the pallet 31. Can be raised. The support seat 36 and the rod portion 38 are provided with a hollow hole 40 along the axial direction of a dimension into which the lower half of the work 2 can be inserted.

An upper unit 45 is provided above the pallet 31. The upper unit 45 includes a press fitting 46 provided above the work 2 so as to face the upper end surface 2 a of the work 2, a hydraulic press fitting cylinder 47 for driving the press fitting 46 up and down, and a rod part of the press fitting cylinder 47. A movable head 50 provided at 48 and a sensor 51 for detecting the height of the movable head 50 are provided. Sensor 51 in the illustrated example
Detects the height of the rod 52 fixed to the movable head 50. Press fitting 46 and support seat 3
The work 6 and the work 2 are located on the same axis.

As shown in an enlarged manner in FIG.
Reference numeral 0 denotes a cylindrical portion 55 fitted to the outside of the press fitting 46, a lower end portion 56 integrally connected to the lower end side of the cylindrical portion 55, and the like. The tubular portion 55 is held so as to be relatively movable in the axial direction (vertical direction) with respect to the press fitting 46. The movable head 50 is urged downward by a compression coil spring 60. At the lower end of the press fitting 46, a flange portion 61 for regulating the position of the lower end of the movable head 50 is provided. The spring 60 is provided in a compressed state between a spring seat 62 provided on the press fitting 46 and a spring seat 63 provided on the movable head 50.

A work guide 70 is provided between the lower end surface 50a of the movable head 50 and the upper surface 6a of the adapter 6. The work guide 70 includes a lower end 71 that contacts the upper surface 6 a of the adapter 6, an upper end 72 that can contact the lower end 56 of the movable head 50, a connecting portion 73 that connects the lower end 71 and the upper end 72, A retainer 74 used when moving the work guide 70 is provided. The work 2 is held by the work guide 70.

Next, the operation of the work press-in device 30 having the above configuration will be described. As shown in FIG. 1, when the work 2 is set in the apparatus 30 of this embodiment, the support seat 36 is lowered to the lower end by the lift cylinder 37 and the press fitting 46 is raised to the upper end by the press cylinder 47. Keep it. Then, the work 2 held by the work guide 70 is inserted into the hole 7 of the adapter 6 and the through hole 32 of the pallet 31 from above. The bearing 3 is inserted in an appropriate position of the work 2 in advance.

Thereafter, as shown in FIG. 3, the rod portion 38 of the lift cylinder 37 is operated to extend, so that the support seat 36 is raised to the rising end, and the press-fit cylinder 47 is pressed from above the work 2. Rod part 4
By operating the extension 8 to the extension side, the press fitting 46 is lowered toward the work 2.

By doing so, the bearing 3 and the adapter 6 are pushed up by the support seat 36 to a position where they float from the upper surface of the pallet 31, and the work 2 is pushed from above by the lower end surface 46a of the press fitting 46. The work 2 is pushed down to a position where the flange 11 of the work 2 contacts the upper surface of the bearing 3. Thus, the work 2 is pressed into the bearing 3 at a predetermined position.

Further, with the press-fitting operation described above, the lower end surface 50a of the movable head 50 pushes down the work guide 70, and the lower surface of the work guide 70 pushes the adapter 6. Therefore, the hole 7 of the adapter 6 is fitted to the outer ring 5 of the bearing 3 as shown in FIG. In this case, since the movable head 50 slightly rises relatively to the press fitting 46 while compressing the spring 60, the elastic force of the spring 60 is transmitted to the adapter 6 via the movable head 50 and the work guide 70. Due to the elasticity of the spring 60,
The adapter 6 is completely pushed in until it comes into contact with the snap ring 9.

After the press-fitting, the rod portion 38 of the lift cylinder 37 is lowered to lower the support seat 36 to a predetermined lower end position, and the rod portion 48 of the press-fit cylinder 47 is raised to a predetermined height. Then, the press fitting 46 and the movable head 50 return to the original height.

[0023]

According to the present invention, the work can be press-fitted to the bearing to the predetermined position, and at the same time as the press-fitting, the adapter can be completely press-fitted to the position in contact with the snap ring.

[Brief description of the drawings]

FIG. 1 is a front view, partially in section, of a work press-in device showing one embodiment of the present invention.

FIG. 2 is a front view showing a part of the work press-in device shown in FIG. 1 in a partial cross section.

FIG. 3 is a front view showing an operation mode of the work press-in device shown in FIG. 1 in a partial cross section.

FIG. 4 is a front view showing a part of the work press-fitting device shown in FIG.

FIG. 5 is a front view showing the work assembly in a partial cross section.

FIG. 6 is a front view showing a part of a conventional work press-fitting device.

[Description of Signs] 2 ... Work, 3 ... Bearing, 6 ... Adapter, 9 ... Snap ring, 30 ... Work press-in device, 31 ... Pallet,
36: Support seat, 37: Lift cylinder, 46: Press-in fitting, 47: Press-in cylinder, 50: Movable head, 60: Spring, 70: Work guide.

Claims (1)

(57) [Scope of request for utility model registration] 1. A work press-fitting device for inserting a shaft-shaped work into an inner peripheral side of a bearing provided with a snap ring on an outer peripheral portion and fitting an adapter to an outer peripheral side of the bearing. A pallet on which the bearing is mounted, a support seat for supporting a lower end surface of the bearing, a lift cylinder for lifting the bearing to a position higher than the pallet when the support seat is moved up and down and operated to the ascending side, and the work A press-fit fitting provided above the work opposite to the upper end face of the work piece; and a state in which the press-fit fitting is moved up and down and moved to a lower side to contact the upper end face of the work piece with a predetermined position with respect to the bearing. And a press-fitting cylinder that is inserted into the press-fitting fitting and is vertically movably provided with a lower end extending toward the adapter. A movable head, a spring for urging the movable head in a downward direction, and a work guide interposed between a lower end surface of the movable head and an upper surface of the adapter. apparatus.