JPH02129409A - Eccentric and deflection angle coupling - Google Patents

Abstract

PURPOSE:To obtain a coupling with larger eccentricity and deflection angle by positioning oppositely a drive shaft side grooved plate and a driven shaft side grooves plate, crossing the direction of the multiple grooves of these grooved plates with each other, mounting drive force transmitting tops in the grooves, and positioning an intermediate plate, incorporating the transmitting tops, between the grooved plates. CONSTITUTION:When the center of rotation 2' of a drive shaft is aligned with that 4' of a driven shaft, a turning force is transmitted to tops 20a to 20d through an arm 6, a holder plate 10, and a grooved plate 14, and transmitted further to the driven shaft 4 through a grooved plate 16, holder plate 12, and an arm 8. When the driven shaft 4 is shifted upward by a distance of D, an intermediate plate 18 is shifted upward and rightward by a distance of D/2, respectively. Under this condition, when the drive shaft 2 is rotated by 90 deg. in the direction of A, the intermediate plate 18 is shifted leftward by a distance of D; when it is rotated by 90 deg. further in the direction of A, the intermediate plate 18 is returned back to the original position. These steps are repeated and the shafts can be rotated in good condition. Also, when the shafts 2 and 4 are deviated with each other, they can be rotated in good condition by means of a hook type universal coupling.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an eccentric eccentric shaft joint, and particularly to an eccentric eccentric shaft joint capable of both large eccentricity and large eccentric angle.

[Prior Art and Problems to be Solved by the Invention] In various rotational force transmission mechanisms, the ends of two shafts are connected to each other by a joint. In this connection, even if both axes have a rotation center, due to various reasons, shaft eccentricity, that is, a misalignment between the rotation centers, or shaft eccentricity, that is, a misalignment between the rotation centers, may occur on the driving shaft side and the driven shaft side. Angles may occur, and joints that can effectively deal with these angles are used. Oldham type joints, Schmidt type joints, etc. are effective for dealing with eccentricity, and hook type joints, etc. are effective for dealing with declination.

Therefore, depending on the application, an eccentric eccentric shaft joint that can deal with both eccentricity and eccentric angle may be required. A flexible shaft joint using a flexible member is used as such an eccentric shaft joint.

However, although flexible shaft joints are capable of transmitting driving force up to a considerable deviation angle, the flexibility of the flexible member must be considerably increased in order to accommodate large eccentric extensions, so good driving force transmission is not possible. The problem is that it becomes difficult.

Thus, an eccentric eccentric shaft joint with good transmission of driving force has an eccentricity rio, i of about 0.5 mm, and an eccentric angle of 4% 1 to 3.
degree was the limit.

SUMMARY OF THE INVENTION In view of the above-mentioned prior art, it is an object of the present invention to provide an eccentric eccentric shaft joint that can transmit good driving force even when both the shaft eccentricity and the shaft declination are large.

[Means for Solving the Problems] According to the present invention, the above-mentioned object is achieved by interposing an eccentric shaft in the connecting portion between the driving shaft side and the driven shaft side of the eccentric shaft joint, and In a shaft coupling, a driving shaft side groove plate and a driven shaft side groove plate are arranged facing each other, and a plurality of grooves are formed on the opposing surfaces of these groove plates, respectively, and the directions of the six grooves on the driving shaft side groove plate are as follows. The direction is νj transverse to the direction of the groove of the driven shaft side groove plate corresponding to Further, between the driving shaft side groove plate and the driven shaft side groove plate, an intermediate plate having a through hole for accommodating the driving force transmission piece and for setting and holding the relative arrangement of all the driving force transmission pieces is arranged. This is achieved by an eccentric eccentric shaft joint, characterized in that:

In the present invention, a hook-type universal joint is used as the eccentric shaft joint, and the driving shaft side arm and the driven shaft side arm are rotated in a direction perpendicular to the direction of the rotation center of the driving shaft or in a direction perpendicular to the direction of the rotation center of the driven shaft. A driving shaft side groove plate and a driven shaft side groove plate may be respectively attached so as to be rotatable relative to each other.

Furthermore, in the present invention, a flexible shaft joint can be used as the dodecagonal shaft joint.

[Example] A specific example of the present invention will be described below with reference to one drawing.

FIG. 1 is a schematic sectional view showing a first embodiment of an eccentric shaft joint according to the present invention.6 In FIG. 1, 2 is a driving shaft, and 2' is its center of rotation. Further, 4 is a driven shaft, and 4' is its rotation center. The driving shaft 2 and the driven shaft 4 are arranged such that one end thereof faces each other and their rotation centers 2' and 4' coincide with each other.

A pair of arms 6 are fixed to the end of the driving shaft 2 symmetrically about the rotation center 2', and similarly, a pair of arms 6 are fixed to the end of the driven shaft 4 symmetrically about the rotation center 4'. Twin arm 8
is permanently installed. Both ends of a holding plate 10 are attached to the arm 6 on the Hg driving shaft side so as to be rotatable around the X direction perpendicular to the driving shaft rotation center 2', and similarly, the arm 8 on the driven shaft side Both ends of the holding plate 12 are attached so as to be rotatable around the shaft rotation center 4' and the Y direction perpendicular to the X direction. And the above-mentioned driving shaft side holding plate l
A groove plate 14 is fixed to O by screws, and similarly, a groove plate 16 is fixed to driven shaft side retaining plate 12 by screws, and between these two groove plates 14 and 1B. An intermediate plate 18 is arranged. The groove plates 14, 16 and the intermediate plate 18 are both parallel flat plates and are arranged in the X-Y plane.

The above-mentioned holding plates 10, 12. A through hole is provided in the center of the lJ plate 14.1B and the intermediate plate 18, and a port-nut 2 is inserted through these to connect the driving shaft side and the driven shaft side.
2 is placed. In addition, 24 is a slide plate;
6 is Il: contracted coil/hene, which makes it a retaining plate! , O, l 2 and the intermediate plate 18 are pressed against each other by benders in the direction of the rotation centers 2', 4'. Further, the diameter of the through hole in the intermediate plate i13 is somewhat larger than the diameter of the bolt 22, and the diameter of the through hole in the retaining plate 12 and the groove plate 1G on the driven shaft side are both larger.

Therefore, these can be moved within an appropriate range in the X-Y plane direction with respect to the bolt 22! Ru. At this time, groove plate 1
4 and intermediate plate i8. The intermediate plate and the groove plate 16 or the retaining plate 1
2 and the slide plate 24 will each slide.

Figure 2 is a schematic diagram of the eccentric shaft joint in Figure 1 of the L article, viewed from the driven shaft side in the direction of the driving shaft and the center of rotation, and Figure 3 is a
In FIG. 2, which is a cross-sectional view of the 4-minute section, the first region (A) of the 4-minute area is a diagram showing from the driving shaft side to the groove plate 14. The second area (b) is a diagram showing from the driving shaft side to the intermediate plate 18, and the third area (/
＼) is a diagram showing the end of the groove plate 16 from the driving shaft side, and the fourth
Area (d) is numbered 1 in the diagram showing the area from the driving force 41j11f11 to the holding plate 12. 1-2 Figure 1 is I- in Figure 2.
As shown in FIGS. 1 and 2, an appropriate distance HF is provided on the surface of the intermediate plate side of the four plates 14 on the drive shaft side in the Y direction from the M drive rotation center 2'. 2 grooves 15a in the X direction at the position shown in FIG.
5.51y is formed, similarly, driven @ # &
On the surface of the intermediate plate side of the 111 plate IG, two iA! t15e and 15d are formed. Said groove 15
All of a to 15d have a rectangular cross-sectional shape.

Original vJ busy gR1 groove board 1/! Driving force transmission pieces 20a, 20b, 2 are located at the intersection of the groove of the driven shaft side groove plate 16
0e and 20d are accommodated and arranged in the grooves of both groove plates. These pieces have a cylindrical shape with an axis of rotational symmetry in a direction perpendicular to the intermediate plate 18, and each has a W formed in the intermediate plate 18, a through hole 19 & (not shown),
19b, 1!3e.

19i (is disposed through it, and the intermediate plate is entirely 1
The function is to keep the relative position of t constant. As a result, if the intermediate plate does not hold the relative position of the 120a-2nd, each piece can move freely within the groove of the original #J axis side groove plate 14 and the groove of the driven shaft fAtIIl plate 16, respectively. , Therefore, the driving shaft 2 and the driven shaft 4 are 511 in the circumferential direction.
L has a degree of freedom in relative rotation, and there is a risk that the piece may fall off from the groove, but the intermediate plate 18 suppresses the occurrence of this degree of freedom and prevents the piece from falling off. .

Next, the operation of this embodiment will be explained, and Figs. 4 and 5
FIG. 6 shows a groove plate 1 for explaining the operation of this embodiment.
4 is a schematic diagram showing the positional relationship between groove &16 and intermediate plate 1B.

When the driving shaft rotation center 2' and the driven shaft rotation center 4' match as shown in FIGS. 1 and 2, the n driving shaft The rotational force of 2 is arm 6
Pieces 20a~ through held iio and 11*ii4
20d, and is further transmitted to the driven shaft 4 through the groove plate 16 and the holding plate 12, and through the art 8. Figure 5 shows the position of the driven shaft 4 by the distance from the state of L article 1 and 2 Uf41. 1 is a schematic diagram similar to the fourth Ff4 showing a state in which it is translated in three directions; FIG. In this state, the intermediate plate 18 has moved upward and to the right by a distance of 1111 (D/2), respectively, compared to the state shown in FIG. 4 above. In addition, in FIG. 5, 18' indicates all the through holes 19a to 1 of the intermediate plate 1B.
9d shows the center of symmetry of the arrangement.

FIG. 6 is a diagram showing a state in which the driving shaft 2 is rotated by 90 degrees in the direction of arrow A in the eccentric state shown in FIG. 5. In this state, the intermediate plate 18 is in the state shown in FIG. On the other hand, it has moved a distance to the left.

When the n-moving shaft 2 is further rotated by 90 degrees in the direction of arrow A,
The state shown in FIG. 5 above is reached. When the driving shaft 2 is further rotated in the direction of the arrow A, the state shown in FIG. 5 and the state shown in FIG. The signal is transmitted to the slave 84 via.

J1 original ijJ axis rotation center 2' and driven axis rotation center 4'
Even if the distance #D changes continuously, the rotational force is transmitted smoothly and satisfactorily while the pieces move within the grooves of the drive shaft side groove plate and the driven shaft side groove plate.

As described above, when eccentricity occurs between the driving shaft 2 and the driven shaft 4, even if the eccentricity is large, it can be effectively dealt with by the eccentric shaft joint made up of the members from the retaining plate 14 to the retaining plate 16. .

Next, if an angle of deviation occurs between the driving shaft 2 and the driven shaft 4,
Even if the deflection angle is large, it can be dealt with favorably by using a hook type universal joint in which the eccentric shaft joint is used as a component for connecting the driving shaft side and the driven shaft side.

Furthermore, even if both eccentricity and deviation occur between the driving shaft 2 and the driven shaft 4, this can be dealt with favorably. However, if both eccentricity and declination occur, the distance between the driving shaft 2 and the driven shaft 4 will change as a result, so in this embodiment, in order to cope with this, as shown in FIG. Similarly, the driving shaft 2 and the rotating shaft l on the drive mound side are connected by a spline 3 so as to be relatively movable in the driving shaft rotation center direction 2'. In addition, driven shaft 4
is fixed to the rotating shaft 7 on the driven side by key coupling. 5 is a keyway.

FIG. 7 is a schematic cross-sectional view showing a second embodiment of the eccentric shaft joint according to the present invention. The sixth figure shows a portion corresponding to FIG. The members are given the same reference numerals.

In this embodiment, a leaf spring body 32 is fixed to the end of the driving shaft 2, and a leaf spring body 34 is similarly fixed to the end of the driven shaft 4.

FIG. 8 is a diagram showing the planar shape of the leaf spring body 32. The leaf spring body 32 has a substantially circular center portion 32a fixed to the end of the driving shaft 2, and four arm portions 32b, 32c, 32d extending from the center portion first in the radial direction and then in the circumferential direction.
32e.

These arms extend in the same direction in the circumferential direction, have the same shape and characteristics, and are arranged rotationally symmetrically.

The leaf spring body 34 has the same shape as the leaf spring body 32 described above.

The state in which the leaf spring body 32 is attached to the end of the driving shaft 2 is the same as the state in which the leaf spring body 34 is attached to the driven shaft 4. That is, the leaf spring body 32 on the driving shaft side is attached to the driving shaft 2 so as to rotate in the direction of the arrow B in FIG. 8, whereas the leaf spring body 34 on the driven shaft side rotates in the direction of the arrow B in FIG. It is attached to the driven shaft 4 so as to rotate in the direction C.

As shown in FIG. 7, the tip of the arm of the drive shaft side leaf spring body 32 is joined to the drive shaft side groove plate 14, and the tip of the arm of the driven shaft side leaf spring body 34 is connected to the driven shaft. It is joined to the side gutter board 16. At the time of this joining, the arm part of the leaf spring body is deformed to some extent, and thereby it is possible to produce deflection angles between the groove plate 14 and the driving shaft 2 and the driven shaft 4, respectively. ing.

FIG. 9 is a diagram showing the planar shape of the groove plate 14.

In this embodiment, the grooves 15a and 15 in the first embodiment are
Four independent grooves 15a, 15a instead of b
, 15b', 15b'' are formed. These grooves penetrate both sides of the groove plate, and as shown in FIG.
A counterbore 36 is provided on the surface on the driving shaft 2 side.

lI! It has the same shape as the 1 plate 16 plate 6 groove plate 14.

In this embodiment, the driving force transmission pieces (20a,
20c) has a cylindrical body with flanges 38 on both end faces, as shown in FIG. Incidentally, as shown in FIG. 10, an extension spring 40 can be provided inside the bridge, which acts to draw the seven lunges 38 on both sides toward each other.

In this embodiment, the driving rotational force of the MgJ shaft 2 first applies a tensile force to the tip of the arm portion of the leaf spring body 32, and the tip is an eccentric shaft joint constituted by the members from the groove plate 14 to the groove plate 16. A tensile force is applied to the eccentric shaft joint, which pulls the end of the arm portion of the leaf spring body 34. This causes the leaf spring body 34 to rotate, and the rotational force is applied to the driven shaft 4.
transmitted to. In this way, in this embodiment, a tensile force is applied to both the arm portion on the driving shaft side and the arm portion on the driven shaft side, so that a relatively large driving force can be smoothly transmitted.

Furthermore, in this embodiment, the handling spring bodies 32 and 34 do not need to function against the occurrence of eccentricity, so they can be made relatively strong, and thus the driving force can be transmitted well. .

[Effects of the Invention] As described above, the eccentric vehicle according to the present invention can increase both the eccentricity and the amount of deviation at the same time, resulting in better driving force transmission. Ru,

[Brief explanation of drawings]

Figure 1 shows book 9. Approximate W showing the eccentric declination angle @jII[ due to brightness
It is an IS sectional view, FIG. 2 is a schematic diagram of the eccentric shaft joint viewed from the driven shaft side in the direction of the rotation center of the driving shaft, and FIG. 3 is a partial sectional view along m-mR thereof. FIG. 4, FIG. 5, and FIG. 6 are schematic diagrams for explaining the operation of the eccentric shaft joint according to the present invention. FIG. 7 is a schematic cross-sectional view showing the eccentric declination shaft joint according to the present invention, FIGS. 8 and 9 are views showing the planar shapes of the leaf spring body and groove plate, respectively, and FIG. FIG. 2 is a schematic perspective view of a force transmission piece; 2: driving shaft; 2':
Driving shaft rotation center, 4: Driven shaft, 4': Driven shaft rotation center, 6.8 = arm, ! 0,12: Holding plate. 14.16: Groove plate. 15a to 15d: groove, 18: intermediate plate, 19a to 19d: through hole. 20a-20d: Driving force transmission piece. 12a-12d: Spherical body, 32, 34: Leaf spring body. Figure 1 Figure ^ Day Figure Figure Figure

Claims (3)

[Claims] (1) An eccentric shaft joint is interposed between the driving shaft side and the driven shaft side of the eccentric shaft joint, and in the eccentric shaft joint,
A driving shaft side groove plate and a driven shaft side groove plate are arranged facing each other, and a plurality of grooves are formed on the opposing surfaces of these groove plates, and the direction of each groove on the driving shaft side groove plate is determined by the corresponding driven The direction crosses the direction of the groove of the shaft side groove plate, and a driving force transmission piece is arranged between each groove of the driving shaft side groove plate and the corresponding groove of the driven shaft side groove plate. An intermediate plate is disposed between the shaft side groove plate and the driven shaft side groove plate and has a through hole for accommodating the driving force transmission piece and for setting and holding the relative arrangement of all the driving force transmission pieces. An eccentric shaft joint. (2) The eccentric shaft joint is a hook type universal joint, and the driving shaft side arm and the driven shaft side arm are rotated in a direction perpendicular to the driving shaft rotation center direction or in a direction perpendicular to the driven shaft rotation center direction. The eccentric eccentric shaft joint according to claim 1, wherein the driving shaft side groove plate and the driven shaft side groove plate are respectively attached so as to be relatively rotatable. (3) The eccentric eccentric shaft joint according to claim 1, wherein the eccentric shaft joint is a flexible shaft joint.