JPH0526058B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) This invention uses three plate cams, two plate cams for stopping, and two follower rollers to smoothly move to the stopping point. The present invention relates to a method for improving the performance of a parallel index cam device.

(Prior Art) In a conventional parallel index cam device, the locking cam was stopped by abutting two follower rollers on the circular arc portion (see Figures 4 and 5 of this application, Japanese Utility Model Publication No. 59-42534). Publication No.).

(Problems to be Solved by the Invention) In the conventional parallel index cam device, since the follower roller 17a and the peripheral wall of the locking cam 4 are separated from each other just before the locking cam 4 stops (FIG. 4),
When the locking cam rotates further (in the direction indicated by the arrow in FIG. 4) and the follower roller 17a comes to rest, there is a risk of collision when it comes into contact with the circular arc portion of the locking cam 4 (FIG. 5). Particularly, devices assembled with preloading had the problem of generating noise.

(Means for Solving the Problems) However, in this invention, the locking cam is eliminated, three plate cams each share the indexing work, and two follower rollers come into contact with the arcuate portions of the two plate cams and stop. In this way, the above-mentioned conventional problems were solved.

That is, the method of the present invention uses three plate cams, two plate cams for stopping and one plate cam for indexing, to perform indexing. This is a method for improving the performance of a parallel index cam device, which is characterized in that two follower rollers are brought into contact with a plate cam for stopping and stopping.

Further, the two follower rollers that come into contact with the plate cam for stopping are characterized in that they are moved to the stopping point while coming into contact with their respective cam surfaces long before the plate cam comes to stop.

(Function) In this invention, two follower rollers are brought into contact with two plate cams for stopping when the vehicle is stationary, and each follower roller is in contact with its respective plate cam before entering the stationary position. Even in the case where the follower roller and the plate cam are assembled in such a manner that the follower roller and the plate cam come into contact with each other very smoothly.

(Example) Next, an example of the present invention will be described based on the drawings of FIGS. 1 to 3.

First, FIG. 1 shows the state before the vehicle stops, and FIG. 2 shows the state when the vehicle stops. A device implementing the present invention has a camshaft 2 and a spider shaft 3 installed in a housing 1, and on the camshaft 2, a plate cam 5 for stopping, a plate cam 4 for indexing, and a plate cam for stopping are attached to the camshaft 2 from the drive side. The cams 6 are fixed one after another. Further, the spider of the spider shaft 3 has follower rollers 17, 17a, 17b, 18, 1 that come into contact with the plate cams 5, 4, 6.
8a, 18b, 19, 19a, and 19b are respectively installed, and in the figure, 7 is a mounting plate inserted between plate cam 5 and plate cam 4, 8 is a dowel pin, 9 is a tightening bolt, and 21 is a plate. This is a flange of the camshaft 2 that fixes the cam 6 and the plate cam 4.

Further, a disk 11 is fixed to the spider shaft 3 with a dowel pin 24 at a predetermined distance from the flange 10.
A follower disk 12 between the flange 10 and the disk 11,
13, and follower rollers 17,
17a, 17b, 18, 18a, 18b, 19,
19a and 19b are mounted on shafts 20 and 20 at equal intervals, respectively. Therefore, each follower roller 17, 17a, 17b, 18, 18 of each spider 16, 15, 14
a, 18b, 19, 19a, and 19b are arranged at equal intervals when viewed from the front view side as shown in FIG. It is in contact with either cam 5 or 6.

In the embodiment described above, when the camshaft 2 rotates in the direction of the arrow 22 in FIG. , the follower roller 19b rolls along the downward wall (negative wall) 6a of the plate cam 6 for stopping, and reaches the stopping position. Therefore, follower roller 1
The contact movement between the plate cam 9b and the plate cam 6 is carried out extremely smoothly, and there is no risk of producing a collision sound or vibration. However, in the case of this embodiment, the follower rollers 19b and 17b come into contact with the plate cams 5 and 6 for stopping and stay there, and by applying a preload between them, the rigidity is maintained.

(Effects of the Invention) According to the present invention, the two follower rollers that enter the stop position are brought into contact with the respective stop plate cams and roll to move to the stop position. However, when the parallel index cam device enters a stationary state, there is no risk that the follower roller and plate cam will collide or cause vibration. This enables faster indexing while
This has the effect of reducing noise.

For example, in conventional indexing devices of this type,
It was difficult to increase the speed if the rpm was higher than 6,000 rpm because it would cause problems, but according to this invention, speeds up to 8,000 rpm or higher
9000rpm is also possible. Furthermore, in the conventional type,
Although the durability was about 2 years, it was confirmed that the product implementing this invention could be used continuously for more than 5 years.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted front view of the apparatus for carrying out the present invention, Fig. 2 is a partially omitted front view of the device when the device is stationary, and Fig. 3 is similarly taken at line A-A in Fig. 2. 4 is a front view of the conventional device before it is stopped, and FIG. 5 is a partial front view when the follower roller and the locking cam are in contact with each other due to stopping. 2...Cam shaft, 3...Spider shaft, 4, 5, 6...Plate cam, 14, 15, 16... Spider, 17, 17
a, 17b, 18, 18a, 18b, 19, 19
a, 19b...Following roller.

Claims (1)

[Claims] 1 In a parallel index cam device that performs indexing using three plate cams, two plate cams for stopping and one plate cam for indexing, two plate cams for stopping A method for improving the performance of a parallel index cam device, which is characterized by bringing two follower rollers into contact with each other and moving the roller to a stationary state while rolling.