JPH02150510A - Shaft coupling with eccentricity and angular deviation - Google Patents

Abstract

PURPOSE:To allow a hook-type universal coupling a large eccentricity and a large angular deviation by providing the said coupling with an intermediate member, which can conduct reciprocating motion relative to a pin, which is placed in the direction across the driving shaft center, in the said direction and moreover which can conduct reciprocating motion relative to another pin, which is placed in the direction across the driven shaft center, in the same direction as that of this pin. CONSTITUTION:A driving shaft 2 and a driven shaft 4 are arranged in such a manner that their rotary centers 2' and 4' have an eccentricity by a distance A in the X- direction. (They may have another eccentricity in the Y-direction at the same time.) A central member 14 is provided with holes 14a and 14b, both of which are concentric with respect to the Y-direction, in addition to holes 14c and 14d, both of which are concentric with respect to the X-direction. A pin 10 is inserted into the holes 14a and 14b, while pins 12 and 13 are inserted into the holes 14c and 14d. The pin 10 can rotate in the holes 14a and 14b relatively around the Y-direction and also can conduct relative, reciprocating motion in the Y-direction. Similarly, the pins 12 and 13 can rotate and conduct reciprocating motion in the holes 14c and 14d in the X- direction. Thus, even if both eccentricity and angular deviation are large, good power transmission can be obtained.

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 by a joint. In this connection, even if both shafts have the same center of rotation, various causes may cause shaft eccentricity, that is, misalignment between the rotation centers, or shaft eccentricity, that is, the center of rotation, between the driving and driven shafts. 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 amount of eccentricity, it is necessary to considerably increase the flexibility of the flexible member in order to accommodate large amounts of eccentricity. The problem is that it becomes difficult.

Thus, conventional eccentric shaft joints with good driving force transmission are limited to an eccentricity of about 0.1 to 0.5 mm and an eccentricity of about 1 to 3 degrees.

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 object is as follows: The driving shaft side and the driven shaft side of the hook type universal joint cross the rotation center of the driving shaft attached to the driving shaft side. Connected via an intermediate member that can reciprocate relative to a pin in the direction and can reciprocate in the direction relative to a pin in a direction that crosses the rotation center of the driven shaft attached to the driven shaft side. This is achieved by an eccentric eccentric shaft joint, characterized in that:

[Example] Hereinafter, specific examples of the present invention will be described with reference to the drawings.

FIG. 1 is a front sectional view showing a first embodiment of the eccentric shaft joint according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a partial sectional view taken along the line It is.

In these figures, 2 is the driving shaft and 2' is its center of rotation. Further, 4 is a driven shaft, and 4' is its rotation center. In the figure, the driving shaft 2 and the driven shaft 4 are arranged such that one end thereof faces each other, and the rotation centers 2' and 4' are offset by a distance A in the X direction.

At the end of the driving shaft 2, there is a
A pair of arms 6, 7 are fixedly attached, and likewise a pair of arms 8, 9 are fixedly attached to the end of the driven shaft 4 symmetrically about its center of rotation 4'.

Both ends of a pin lO in the X direction are fixed to the arm 6.7 on the driving shaft side. On the other hand, pins 12 and 13 in the X direction are coaxially fixed to the arms 8 and 9 on the driven shaft side, respectively.

14 is a ring-shaped intermediate member that connects the driving shaft side and the driven shaft side. The intermediate member has a coaxial hole 14a in the X direction.
, 14b and coaxial holes 14c and 14d in the X direction are provided, the pins 10 are inserted into the holes 14a and 14b, and the pins 12 and 13 are inserted into the holes 14c and 14d, respectively. has been done. Here, the above pin 10
are relatively rotatable around the X direction within the holes 14a and 14b, and relatively movable back and forth in the X direction. Similarly, said pins 12, 13 are respectively connected to said holes 14.
It is relatively rotatable around the X direction within c and 14d, and relatively movable back and forth in the X direction.

In addition, although the driving shaft rotation center 2' and the driven shaft rotation center 4' are eccentric only in the X direction in FIGS. 1 to 3 of L2, they can be eccentric by an appropriate distance in the X direction as well. One thing is clear.

FIG. 4 is a perspective view of an eccentric shaft joint having the same configuration as the first embodiment, and in this figure, the same members as in FIGS. 1 to 3 are given the same reference numerals. There is.

In the embodiments described above, pin 10, pin 12.
By appropriately setting the strokes of relative reciprocation in the X direction and the X direction between the intermediate member 13 and the intermediate member 14, sufficiently large eccentricity can be coped with.

Further, in the above embodiment, it is possible to cope with a sufficiently large deflection angle as in the conventional hook type universal joint.

! Figure @5 is a perspective view showing a second embodiment of the eccentric shaft joint according to the present invention. In this figure, the same members as in the above-mentioned Figs. 1 to 4 are given the same reference numerals.

In this embodiment, the pin 10 on the driving shaft side has a portion 10a in the center from which the majority portion on the driven shaft side has been removed, and the pin 10 on the driving shaft side has a portion 10a on the driving shaft side as well, in the same manner as the driving shaft side. This embodiment differs from the first embodiment only in that a pin 12 having a portion 12a with a portion removed is used.

Like the first embodiment, this embodiment can deal with both large eccentricity and large declination angle, and also uses one pin that passes through the intermediate member 14 on both the driving shaft side and the driven shaft side. Therefore, strength and stability of driving force transmission are improved.

FIG. 6 is a perspective view showing a third embodiment of the eccentric shaft joint according to the present invention. In this figure, the same members as in the above-mentioned Figs. 1 to 5 are given the same reference numerals.

In this embodiment, the pin 10 on the driving shaft side and the pin 12 on the driven shaft side are connected directly to the driving shaft 2 and the driven shaft, respectively.
is fixed at the end of the Both ends of these pins are inserted into the holes 14a-14d from the inside of the ring-shaped intermediate member 14. Furthermore, as shown in the figure,
The center portion of the pin 12 is bent into a U-shape so that the pin 10 on the driving shaft side and the pin 12 on the driven shaft side do not come into contact with each other.

Like the second embodiment, this embodiment can cope with both large eccentricity and large deviation angle, and uses one pin that passes through the intermediate member 14 on both the driving shaft side and the driven shaft side. The strength and stability of driving force transmission are improved, and since the pins 10 and 12 are directly attached to the driving shaft 2 and the driven shaft 4, the structure is simple.

[Effects of the Invention] The eccentric shaft joint of the present invention as described above can simultaneously increase both the amount of eccentricity and the amount of deviation, and can transmit good driving force.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of an eccentric shaft joint according to the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a
■It is a partial sectional view. 4 to 6 are perspective views of an eccentric shaft joint according to the present invention. 2': Driving shaft rotation center, 4': Driven shaft rotation center, : Arm, 3: Pin, 14a"14d: Hole. 2: Driving shaft, 4: Driven shaft, 6.7, 8, 9 10.12, 1 14 = intermediate member, Figure 4b

Claims (1)

[Claims] (1) The driving shaft side and driven shaft side of the hook type universal joint are
It is movable reciprocally in the direction relative to the pin installed on the driving shaft side in the direction that crosses the rotation center of the driving shaft, and is movable in the direction relative to the pin installed on the driven shaft side in the direction that crosses the rotation center of the driven shaft. An eccentric eccentric shaft joint, characterized in that the joint is connected via an intermediate member that is relatively movable back and forth.