JPS6052330B2 - Constant velocity joint - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a joint for joining an input shaft and an output shaft that are eccentrically connected to each other in a parallel state. It is characterized by having a similar configuration.

In cases where the allowable range of eccentricity between the input shaft and output shaft is wide and the width of misalignment constantly changes, conventionally the input shaft 12 and output shaft 15 are connected by two crosses, as shown in FIG. A joint in which moldable joints 13 and 14 were connected was used.

This joint can always synchronize the rotational speed of the output shaft 15 with the rotational speed of the input shaft 12 even though the width of misalignment between the input shaft 12 and the output shaft 15 changes. Since the flexible joint is inevitably long, it has the disadvantage that the places where it can be used are extremely limited. The present invention solves the above-mentioned conventional drawbacks, and is extremely compact, has a wide allowable range of eccentricity between the input shaft and the output shaft, and does not change the width of misalignment during rotation. Also, the output shaft is configured to always rotate at the same speed as the input shaft.

To explain the outline of the present invention here, this device consists of a pair of discs (input disc and output disc) and an intermediate disc sandwiched between them, and the center of rotation of the intermediate disc is always the center of rotation of both discs. It is located at the center of the rotation center, and is configured to transmit the rotation of the input disc to the intermediate disc, and further transmit the rotation of the intermediate disc to the output disc.

The present invention will be specifically described below based on illustrated embodiments.

In the figure, numeral 1 is an input disk, 2 is an intermediate disk, and 3 is an output disk.

The input disk 1 is attached to the tip of the input shaft, and
A mounting tube 4 is integrally protruded from the center of the back surface, and the input disk 1 is attached to the input shaft via this mounting tube 4. Further, the output disk 3 is a pair with the input disk 1, and, like the input J disk, has a mounting tube 5 integrally protruding from the center of the back surface. The intermediate disk 2 rotates in response to the rotation of the input disk 1, and further acts as an intermediary to transmit the rotation to the output disk 3, and is engaged with the input disk 1 and the output disk 3, respectively. ing. The figure shows an example of an engagement mechanism, in which engagement grooves 6 and 6' are cut on both sides of the center of rotation of the intermediate disk 2, and an input pin 7 is formed on the input disk 1. The output disk 3 is also provided with an output pin 8 that projects and is inserted into the engagement groove 6''.
As already mentioned, the input disk 1 and the output disk 3 form a pair, and the mounting position of the input pin 7 on the input disk 1 and the mounting position of the output pin 8 on the output disk 3 are respectively Needless to say, it is equidistant from the center of rotation of the disk. Next, the intermediate disk 2 is supported at the center of the rotation center of the input disk 1 and the output disk 3, and a pivot 9 is rotatably fitted in the center of the intermediate disk 2. On the other hand, balls 10 and 11 having approximately the same diameter as the inner diameter of the respective mounting pipes are fitted into the mounting pipes 4 and 5, and the balls 10 and 11 and the pivot 9 are connected to engaging rods 16 and 17 having the same length. They are supported in a straight line at equal intervals. Therefore,
The input disk and the output disk are always arranged symmetrically with respect to the intermediate disk. A mechanism for transmitting the rotation of the input disk 1 to the output disk 3 will be explained. FIG. 2 schematically shows the arrangement of the input disk 1, intermediate disk 2, and output disk 3. In the figure, the input disk 1 rotates clockwise. Then, the input pin 7 protruding from the input disk 1 rotates while drawing a circular orbit x centered on point a. Since the input pin 7 fits into the engagement groove 6 cut into the intermediate disk 2, the intermediate disk 2 is pushed by the input pin 7 and rotates clockwise. By the way, the rotation center a of the input disk 1 and the intermediate disk 2
, is eccentric from the rotation center b of L is the longest when input pin 7 is at the lowest position in the diagram.
The best time is when it is at the top position! will also be shorter. Therefore, if the input disk 7 rotates at a constant rotation speed n on the circumference of a radius 1, the rotational speed of the intermediate disk 2 changes in proportion to (NXl)/L.

When the intermediate disk 2 rotates, the rotation is transmitted to the output pin 38 and the output disk 3 rotates. If the rotation radius of the output pin 8 is I'', the distance between the center b of the intermediate disk 2 and the output pin 8 is L'', and the number of rotations of the intermediate disk is N, then the output disk 3
rotates in proportion to (NXL″)/l″. By the way, as already mentioned, the output disk 3 has point symmetry with respect to the input disk 1, so 1'' is equal to 1 and L'' is equal to L.

Also, since the intermediate disk 2 rotates at a speed proportional to (n×l)/L, the output disk, like the input disk 1, eventually rotates at a speed of rotation number n. As described in detail, in the present invention, the intermediate disk 2 is interposed between the input disk 1 and the output disk 3, and the input disk 1 and the output disk 3 are point symmetrical with respect to the intermediate disk 2. The rotation of the input disk 1 is transmitted to the output disk 3 via the intermediate disk.

Therefore, even if the amount of eccentricity relative to the input disk changes, the output disk always rotates at the same speed as the input disk.

In the illustrated embodiment, pins are provided protruding from the input disk and output disk, and engagement grooves are cut into the intermediate disk. Alternatively, it goes without saying that the effects of the present invention will not change even if an engagement groove is cut in the output disk.

[Brief explanation of drawings]

Fig. 1 is a longitudinal side view showing an embodiment of the present invention, Fig. 2 is a front view schematically showing the invention, and Fig. 3 is a side view schematically showing a joint using a cross-shaped universal joint. be. 1...Input disk, 2...Intermediate disk, 3
...Output disc, 4...Mounting tube, 5...
...Mounting pipe, 6...Engagement groove, 7...
・Input pin, 8... Output pin, 9...
Pivot, 10...ball, 11...ball,
12...Input shaft, 15...Output shaft, 1
6... Engagement rod, 17... Engagement rod.

Claims (1)

[Claims] 1 The balls 10, 11 and the pivot are connected to the same length engagement rods 16, 1
7 are supported in a straight line at equal intervals, a mounting tube is protruded from the back of the input disk, a ball 10 is fitted into this, and a pivot is rotatably fitted into the center of rotation of the intermediate disk. Furthermore, a mounting tube is provided protruding from the back of the output disk, into which the ball 11 is inserted, and engagement grooves 6 and 6' are cut in the intermediate disk between the center of rotation, and the input tube is inserted into the input disk. A protruding pin is provided and inserted into the engaging groove 6, an output pin is provided protruding from the output disk, and the pin is inserted into the engaging groove 6.
A constant velocity joint characterized by being fitted into the