JPH047855Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a camshaft snap spring assembling machine for assembling a snap spring to a camshaft, which is an engine part of an automobile.

[Conventional technology]

Conventionally, Japanese Patent Laid-Open Nos. 57-15644 and 181525-1988 have proposed assembling machines for fitting ring-shaped objects into grooves into which they are to be fitted. JP-A-57-15644 discloses an automatic loading device for loading a snap spring onto the shaft of an automobile transmission, and JP-A-58-181525 discloses an automatic insertion device for piston rings into the piston. . However, these are not suitable for the workpiece to which the ring is attached.
This is an automatic ring loading device for cases where there is no protrusion such as a cam portion of a camshaft that obstructs the attachment of a ring, and this device cannot be applied to assembling a snap ring to a camshaft that has a protrusion such as a cam portion.

Conventionally, when assembling a snap spring to a camshaft, the cam part of the camshaft protrudes, so when the camshaft is positioned and fixed and the snap spring is mechanically assembled from one end of the camshaft, the snap spring hits the cam part of the camshaft. contact, it is impossible to assemble,
Workers used special tools to carefully assemble the camshaft to avoid damaging it.

[Problems that the invention aims to solve] For this reason, it takes a lot of time to assemble the camshaft snap spring, the assembly requires skill, and it is expensive because the worker uses special tools to assemble it. Problems such as damage to the camshaft occurred.

The purpose of the present invention was made in view of the above-mentioned problems, and it is an object of the present invention to provide a camshaft snap spring assembling machine that automatically performs the assembling work of camshaft snap springs, which has been difficult to automate in the past. It is in.

[Means for solving problems]

The camshaft snap spring assembling machine according to the present invention for achieving the above object has a loading part and an assembling part in the assembling machine main body, and is placed and positioned in the loading part, and has an upper end part and a lower end part. a notched groove which is eccentrically formed, has a snap spring expansion surface inclined on the outer circumferential surface of the lower end, has a camshaft application hole opened at the lower end inside, and is opened from the upper end to the lower end. a manipulator that transports the eccentric adapter between the loading section and the assembly section, and a camshaft that connects a snap ring disposed in the assembly section and attached to the eccentric adapter. a press-fitting device for assembling the camshaft at a predetermined position; and a detection means for detecting that the camshaft positioning device provided in the assembly portion is properly attached to the camshaft positioning device. It consists of a distinctive camshaft and snap spring assembly machine.

[Effect]

In the camshaft snap spring assembly machine of the present invention, in order to assemble the snap spring to the camshaft, the snap spring is attached to the eccentric adapter having a special structure as described above from above at the loading section, and the snap spring is attached to the eccentric adapter with the snap spring attached. is transported from the loading section to the assembly section using a manipulator. In the assembly section, the camshaft is correctly positioned and set in the camshaft positioning device by the detection means. It was transported above the camshaft in the assembly section.
The eccentric adapter that supported the snap spring is lowered, and the application hole of the eccentric adapter covers the camshaft to the end of the snap spring assembly part, and at this time, the cam part of the camshaft escapes through the notch groove, and the snap spring is pushed down by the press-fitting device. Expand the snap ring using the expansion surface of the eccentric adapter, and push it further so that the spring contraction action of the snap ring causes it to fit into the groove.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a camshaft snap spring assembling machine according to the present invention will be described below with reference to the drawings.

1 to 6 illustrate embodiments of the present invention. 1 to 3 and 6, the assembly machine main body 1 mainly loads a snap spring B (see FIG. 5) onto an eccentric adapter 16 (see FIG. 4), and loads it into an assembly section. and an assembly section for loading the snap spring B attached to the eccentric adapter onto the camshaft A (see Fig. 1).

A manipulator 2 for transporting the eccentric adapter 16 from the loading section to the assembly section is disposed in the loading section of the assembly machine main body 1. As is clear from FIG. 3, a holder 3 is supported by a bracket 4 fixed to the assembly machine main body 1, and a slide shaft 5 is rotatably fitted into the holder 3. The lower end of the slide shaft 5 is rotatably supported by a bearing 6 supported by a bracket 4' fixed to the assembly machine main body 1. A rotary actuator 7 is disposed above the slide shaft 5 , and a drive shaft of the rotary actuator 7 is connected to the upper end of the slide shaft 5 at a connecting portion 8 . The connecting portion 8 is provided with a stopper (not shown) that suppresses the rotation of the slide shaft 5 within a certain range. Therefore, when the rotary actuator 7 operates and rotates forward or reverse, the slide shaft 5 rotates left and right within a certain angular range. A slide bearing 9 is fitted into the slide shaft 5 so as to be slidable in the vertical direction, and the slide bearing 9 rotates integrally with the slide shaft 5 in the left-right direction. A gripping device 10 is fixed to the slide bearing 9, and the gripping device 10 has gripping claws 11. A gripping device elevating cylinder 12 is fixed to the bracket 4, and the cylinder 12
is connected to the gripping device 10 to move the gripping device 10 up and down. A guide plate 13 is provided near the lower end of the piston rod of the gripping device elevating cylinder 12, and the guide plate 13 has an arc-shaped guide groove 13' whose arc center is on the rotation axis of the slide shaft 5. The guide plate 13 is supported by a knuckle 12' fitted on a piston rod of the gripping device lifting cylinder 12 such that the knuckle 12' fits into an arcuate guide groove 13'. A connecting fitting 14 is fixed to the slide bearing 9, and the connecting fitting 14 is connected to the guide plate 13. A stopper 15 for suppressing the lowering of the gripping device 10 is disposed at a position facing the knuckle 12' of the gripping device elevating cylinder 12.
The stop 15 is adjustably mounted on the bracket 4'.

The eccentric adapter 16 is positioned and installed at a suitable location in the loading section. As shown in FIG. 4, the eccentric adapter 16 has an upper end 16' and a lower end 16'' whose circular centers are eccentric to each other, and an expansion surface 17 for expanding the snap ring B is formed on the outer peripheral surface of the lower end 16''. Furthermore, a cutout groove 18 that opens at the lower end portion 16'' is formed.The cutout groove 18 is designed to allow the eccentric adapter 16 to open when placed on the loading section.
When applied to camshaft A in the assembly section described later,
It serves as a relief groove for the cam portion of the camshaft A. An application hole 19 for the camshaft A is bored in the eccentric adapter 16.
9 opens at the lower end 16''.

A press-fit device 20 is disposed in the assembly section of the assembly machine main body 1. A holder 21 is supported by a bracket 22 fixed to the assembly machine main body 1. Holder 2
A press-fit shaft 23 is slidably fitted into the press-fit shaft 23, and a press-fit hole 23' is bored in the lower end of the press-fit shaft 23. Bracket 2 fixed to assembly machine body 1
A press-fit cylinder 24 is supported at 2', and the piston rod of the press-fit cylinder 24 is connected to the press-fit shaft 23.
It is connected to the upper end of the connector 25 by a connector 25. Therefore, as the piston rod of the press-fit cylinder 24 expands and contracts, the press-fit shaft 23 moves up and down. A camshaft support device 26 is further provided in the assembly section. The assembly machine body 1 has a clamp cylinder 2.
Clampers 29 and 30 are rotatably connected to the piston rods of the clamp cylinders 27 and 28, respectively. The clampers 29 and 30 are opened and closed by the expansion and contraction of the piston rods of the clamp cylinders 27 and 28, respectively. 31 is a proximity switch for detecting whether the camshaft is properly installed in a predetermined position, and 32 is a snap spring stocker. .

The operation of the camshaft snap spring assembling machine configured as above will be explained. First, the operator attaches the snap spring stocker 32 to the eccentric adapter 16 placed at a predetermined position in the loading section.
Take out the snap spring B and attach it to the eccentric adapter 16 from above. Next, camshaft A is set on the camshaft support device in the assembly section. At this time, the nearby switch 31 detects whether the camshaft A is set correctly.

Then, when the operator turns on the start switch, if the proximity switch 31 detects that the camshaft A is correctly set, the piston rods of the clamp cylinders 27 and 28 are extended, and the clampers 29 and 30 move the camshaft A. to clamp.

On the other hand, the gripping device 10 is activated and the gripping device 10
Grip the eccentric adapter 16 with the gripping claws 11 of.
When the eccentric adapter 16 is gripped by the gripping claws 11, the gripping device elevating cylinder 12 is activated, the piston rod of the cylinder 12 is shortened, and the eccentric adapter 16 is lifted to a predetermined height. When the eccentric adapter 16 is lifted to a predetermined height, the rotary actuator 7 is activated, and the drive shaft of the rotary actuator 7 rotates by a predetermined angle, transporting the eccentric adapter 16 above the camshaft A in the assembly section. do. At this time, the rotation angle of the drive shaft of the rotary actuator 7 is set so that the camshaft A and the application hole 19 of the eccentric adapter 16 to the camshaft A exactly match, so that the eccentric adapter 16 is placed above the camshaft A. When the camshaft A is conveyed to the camshaft A, the piston rod of the gripping device elevating cylinder 12 extends until it comes into contact with the stopper 15, and the eccentric adapter 16 is lowered, and the upper part of the camshaft A (the end after the snap-spring assembly part) is attached to the eccentric adapter 16. It covers at the application hole 19 of.

When the upper part of the camshaft A is covered with the eccentric adapter 16, the gripping device 10 is activated and the gripping claws 11
release the grip on the eccentric adapter 16. At this time, there is sufficient space between the outer circumferential surface of the eccentric adapter 16 and the gripping claw 11 for the press-fit shaft 23 to pass through, so the gripping device 10 can be attached to a snap ring ring (described later) with the gripping claw 11 open. Wait until B is assembled into the predetermined position of camshaft A.

When the eccentric adapter 16 is released from the grasping claw 11, the press-fit cylinder 24 is activated, the piston rod of the press-fit cylinder 24 is shortened, the press-fit shaft 23 is lowered, and the eccentric adapter 16 is moved to the press-fit shaft 23.
is inserted into the press-fit hole 23' of the press-fit shaft 23, and the tip of the press-fit shaft 23 contacts the snap spring B. The press-fit shaft 23 further descends even when the tip of the press-fit shaft 23 contacts the snap spring B, so the snap spring B gradually slides down the expansion surface 17 of the eccentric adapter 16 and is expanded, and the bottom end 1 of the eccentric adapter 16 is expanded.
6'', the expansion of the eccentric adapter 16 is released, the eccentric adapter 16 is contracted by the action of the spring, and is assembled at a predetermined position on the camshaft A. Press-fit shaft 23
The lowering stops at the position where the snap spring B passes the eccentric adapter 16.

When the snap spring B is assembled at a predetermined position on the camshaft A, the piston rod of the press-fit cylinder 24 is then shortened, and the press-fit shaft 23 is returned to its original position. When the press-fit shaft 23 returns to its original position, the gripping device 10 operates to grip the eccentric adapter 16 again with the gripping claws 11. When the eccentric adapter 16 is gripped by the gripping claws 11, the gripping device elevating cylinder 12 is activated, the piston rod of the gripping device elevating cylinder 12 is shortened, and the gripping device 10 is raised to a predetermined height. When the gripping device 10 rises to a predetermined height, the rotary actuator 7 is activated, the drive shaft of the rotary actuator 7 is reversed, and the eccentric adapter 16 is transported to the loading section. When the eccentric adapter 16 is transported to the loading station, the piston rod of the gripping device lifting cylinder 12 is expanded to place the eccentric adapter 16 in its original position. When the eccentric adapter 16 is placed in the original position, the gripping device 10 is activated to release the grip of the eccentric adapter 16 by the gripping claws 11.

On the other hand, when the snap spring B is assembled to the predetermined position of the camshaft A, the clamp cylinder 2
Piston rods 7 and 28 are shortened and clamper 2
The clamp of camshaft A by 9 and 30 is released. When the clamp on the camshaft A is released, the operator removes the camshaft A to which the snap spring B has been assembled, and one assembly cycle is completed.

[Effect of idea]

As explained above, according to the present invention, by devising an eccentric adapter to adapt a snap spring to a camshaft, it is possible to automate a camshaft snap spring assembly machine, which has been extremely difficult to automate in the past. , productivity is improved, and since the eccentric adapter is placed over the camshaft and the snap spring is assembled to the camshaft, the expensive camshaft is not damaged.

[Brief explanation of drawings]

FIG. 1 is a front view of a camshaft snap spring assembly machine according to an embodiment of the present invention, FIG. 2 is a side view of the assembly machine of FIG. 1, FIG. 3 is an enlarged side view of a manipulator, and FIG. 5 is a front view of the eccentric adapter, FIG. 5 is a front view of the snap spring, and FIG. 6 is a schematic perspective view of the main parts of the present invention. 1... Assembly machine body, 2... Manipulator, 5...
...Slide shaft, 7...Rotary actuator, 9...Slide bearing, 10...Gripping device, 12...Gripping device lifting cylinder, 13...
Guide plate, 15...stopper, 16...eccentric adapter, 16'...upper end, 16''...lower end, 17
... Expansion surface, 18 ... Notch groove, 19 ... Applicable hole,
20... Press-fit device, 21... Holder, 23... Press-fit shaft, 24... Press-fit cylinder, 26... Camshaft support device, 27, 28... Clamp cylinder, 29, 30... Clamper, 31... Proximity switch , 32...Snat Spring Stotsuka, A...
Camshaft, B...Snat spring.

Claims (1)

[Scope of utility model registration request] The assembling machine body has a loading part and an assembling part, is placed and positioned in the loading part, has an upper end part and a lower end part eccentrically, and forms an extended surface of the snap ring by slanting the outer peripheral surface of the lower end part. , a camshaft application hole opened at the lower end is bored inside, and
an eccentric adapter in which a notched groove opening from an upper end to a lower end is formed at an appropriate position on the periphery; a manipulator for transporting the eccentric adapter between the loading part and the assembly part; and a manipulator disposed in the assembly part. A press-fitting device for assembling the snap spring attached to the eccentric adapter at a predetermined position on the camshaft, a camshaft positioning device provided in the assembly portion, and detecting that the camshaft is properly attached to the camshaft positioning device. A camshaft nut spring assembling machine comprising: a detection means.