JPH04145230A - Shaft coupling - Google Patents

Abstract

PURPOSE:To effectively cope with axial declination, axial eccentricity and sliding movement by forming grooves at the motive power side end part and a driven side end part, and interposing a deflectable torque transmission member, provided with slide parts against both end parts, between both end parts. CONSTITUTION:Two grooves 12a, 12b in the X-direction are formed at a motive power shaft end part 3, and two grooves 16a, 16b in the Y-direction are formed at a driven shaft end part 5. A deflectable torque transmission member 20 is interposed between both end parts 3, 5, and this deflectable torque transmission member 20 is formed by jointing two motive power side slide parts 14a, 14b to two driven side slide parts 18a, 18b in parallel crosses. The slide parts 14a, 14b and 18a, 18b are respectively accommodated in the grooves 12a, 12b and 16a, 16b in such a way as to be movable in the Y-direction and Z-direction respectively. Axial declination, axial eccentricity and thrust movement can be coped with by the sliding movement, deformation, oscillation and axially parallel movement of the slide parts 14a, 14b and 18a, 18b.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a shaft joint, and particularly to eccentricity between a driving shaft and a driven shaft,
The present invention relates to a shaft coupling that can handle both deflection angle and thrust movement and can transmit good rotational force.

[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, due to various reasons, the axis deviation angle, that is, the angle formed by the rotation centers, and the axis eccentricity, that is, the angle between the rotation centers, may occur between the driving shaft side and the driven shaft side. Parallel misalignment may occur, and a joint that can effectively deal with this is used. Hook joints and the like are effective for dealing with deviation angles, and Oldham joints, Schmidt joints, etc. are effective for dealing with eccentricity.

Although these joints are extremely effective against one side of declination and eccentricity, they cannot effectively deal with both.

Furthermore, relative movement (thrust movement) in the axial direction may occur between the driving shaft and the driven shaft, and it is desirable to be able to deal with this effectively.

Therefore, a flexible shaft joint using a flexible member is used as a shaft joint that can effectively deal with both the declination and eccentricity and is capable of thrust movement.

Examples of the flexible shaft joint include those using a spring or a wire as a flexible member. However, in these conventional flexible shaft joints, measures against eccentricity, declination, and thrust movement are imposed only on the deformation of the flexible member, so the flexible member has a relatively large amount of deformation. That is, a relatively soft material had to be used, and as a result, rotational force transmission during the transition period when the equilibrium state changed was not sufficiently good.

Therefore, the present invention provides an improvement that can effectively cope with both shaft deviation angle and shaft eccentricity, can perform thrust movement, and can also transmit rotational force well even during the transition period when the equilibrium state changes. The purpose is to provide a shaft coupling that is

[Means to solve the problem] According to the invention, the above objects are achieved.

A driving shaft end and a driven shaft end are arranged to face each other, and the driving shaft end has a first direction in a plane perpendicular to the direction of the driving shaft rotation center on an end surface opposite to the driven shaft end. A plurality of grooves are formed in parallel along the driven shaft end, and an end surface facing the driving shaft end crosses the first direction in a plane orthogonal to the driven shaft rotation center direction. A plurality of grooves are formed in parallel along the second direction, and a flexible rotational force transmitting member is interposed between the driving shaft end and the driven shaft end. The rotational force transmitting member is housed in each groove at the end of the driving shaft and is housed in each groove at the end of the driven shaft and a driving side slide part that is slidable in the first direction and toward the rotation center of the driving shaft. This is achieved by a shaft coupling, characterized in that it has a driven side sliding portion that is slidable in the second direction and in the rotation center direction of the driven shaft.

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

FIG. 1 is an exploded perspective view showing a first embodiment of a shaft coupling according to the present invention, FIG. 2 is a perspective view showing its assembled state, and FIG. 3 is a partially omitted front view thereof. FIG. 4 is a sectional view taken along line IV-IV.

In these figures, 2 is the driving shaft, 2° is its center of rotation, and 3 is the end of the driving shaft.

Also, 4 is the driven shaft, 4゛ is its rotation center,
5 is the driven shaft end. The driving shaft 2 and the driven shaft 4 have ends 3 and 5 facing each other and rotation centers of 2° and 4.
゛ are arranged so that they match in the Z direction.

The end face of the driving shaft end 3 on the side of the driven shaft end 5 is a plane (X-Y plane) perpendicular to the driving shaft rotation center 2', and the end face has an X direction perpendicular to the Z direction. Two grooves 12a and 12b having a rectangular cross section are formed along the grooves.

Similarly, the end face of the driven shaft end 5 on the drive shaft end 3 side is a plane (X-Y plane) perpendicular to the driven shaft rotation center 4°, and the end face has the above Z direction and Two grooves 16a and 16b with a rectangular cross section are formed along the Y direction that is perpendicular to both directions.

A flexible rotational force transmitting member 20 is interposed between the driving shaft end 3 and the driven shaft end 5.

The rotational force transmission member 20 has two driving side slide parts 14a.
, 14b and two driven slide portions 18a, 18b are joined in a cross-shaped configuration. The driving side slide parts 14a and 14b are respectively connected to the groove 12 of the driving shaft end 3.
a, 12b, and is movable within these grooves in the X and Z directions. Similarly, the driven side slide portions 18a and 18b each have a groove 16a in the driven shaft end portion 5.
, 16b, and is movable within these grooves in the Y and Z directions.

In this embodiment, the rotational force transmitting member 2o is made of one piece. In this case, the rotational force transmission member 20 is made of synthetic resin (
For example, it consists of Delrin (trade name). Furthermore, the rotational force transmitting member 20 has self-lubricating properties and continuously lubricates the driving shaft end 3 and the driven shaft end 5.

The shaft joint of this embodiment as described above can be easily manufactured by assembling the constituent members as shown in FIG. 1, and parts replacement work is also simple.

In this embodiment, when the driving shaft 2 rotates, the rotational force is transferred to the driving side slide portions 14a, 14 of the rotational force transmitting member 20.
b and the driven side slide portion 18a.

18b, and the driven shaft 4 is rotated. At this time, the driving side slide portion 14 of the rotational force transmission member 20
a, 14b and the driven slide portions 18a, 18b, and especially at their joints, deformations to this extent are allowed.

If eccentricity occurs between the driving shaft rotation center 2° and the driven shaft rotation center 4°, the driving side slide portions 14a and 14b will mainly slide within the grooves 128° and 12b, and within the grooves 16a and 16b. The driven side slide portions 18a, 18 of
Due to the sliding movement of b, the driving side sliding portion 14a is further moved.
, 14b and the driven-side slide portions 18a, 18b, even if the bending deformation is caused.

In addition, if an angle of deviation occurs between the driving shaft rotation center 2° and the driven shaft rotation center 4°, the driving side slide portions 14a and 14b may deform and swing within the grooves 12a and 12b (driving shaft rotation center 4°). uneven movement in the 2° direction of the center of rotation) and grooves 16a, 16
Due to the deformation and rocking of the driven side slide parts 18a and 18b within 7a (unequal movement in the 4° direction of the driven shaft rotation center),
Furthermore, bending deformation of the joint portions between the driving side slide portions 14a, 14b and the driven side slide portions 18a, 18b can be dealt with favorably.

Furthermore, in the case of thrust movement between the driving shaft rotation center 2'' and the driven shaft rotation center 4'', the groove 12a.

Parallel movement of the driving side slide portions 14a, 14b in the driving shaft rotation center 2' direction within the driving shaft 12b and the grooves 16a, 16b
This can be effectively handled by moving the driven side slide portions 18a, 18b in parallel in the 4° direction of the rotation center of the driven shaft.

In reality, the eccentricity, yaw angle, and thrust movement described above occur in combination, and accordingly, a combination of the above movements is exhibited.

Incidentally, since the magnitudes of the eccentricity, declination angle, and thrust movement are limited within a range that is substantially within the range, the driving side slide portions 14a, 14 of the rotational force transmitting member 20 are
b and the driven side slide portions 18a, 18b will not come off from the groove, nor will any part of the rotational force transmitting member 20 be deformed beyond the allowable limit.

As described above, according to this embodiment, the rotational force transmission member 2
By performing three types of deformation/displacement at the same time: deformation of 0, movement of the driving side slide parts 14a, 14b within the grooves 12a, 12b, and movement of the driven side slide parts 18a, 18b within the grooves 16a, 16b. , even if each deformation/displacement is small, a desired amount of deformation/displacement can be obtained comprehensively, and the rotational force is transmitted particularly well during the transition period when the equilibrium state changes. In the embodiment, since the rotational force transmitting member 20 made of synthetic resin is used, the effect of damping vibrations and suppressing transmission of the vibrations is also good.

FIG. 5 is an exploded perspective view showing a second embodiment of the shaft joint according to the present invention, and FIG. 6 is a partially exploded perspective view thereof. In these figures, the same members as in FIGS. 1 to 4 are given the same reference numerals.

In this embodiment, the rotational force transmitting member 2o is not integrated, but two driving side slide parts 14a, 14b and two driven side slide parts 18a, 18b, as shown in FIG. It is connected by The connecting portion can be modified in the same manner as in the first embodiment.

In this embodiment as well, the same effects as in the first embodiment described above can be obtained.

[Effects of the Invention] As described above, the shaft joint of the present invention uses a flexible rotational force transmission member having a driving side sliding portion and a driven side sliding portion, thereby reducing the shaft deflection angle and the shaft eccentricity. It is possible to cope with both problems well, to allow thrust movement, and to transmit rotational force well even during the transition period when the equilibrium state changes.

Furthermore, according to the shaft joint of the present invention, vibration transmission can be suppressed.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a shaft coupling according to the present invention, FIG. 2 is a perspective view showing its assembled state, and FIG. 3 is a partially omitted front view thereof. FIG. 4 is a sectional view taken along line IV-IV. FIG. 5 is an exploded perspective view showing a second embodiment of the shaft joint according to the present invention, and FIG. 6 is a partially exploded perspective view thereof. 2: Driving shaft, 2°: Driving shaft rotation center, 3: Driving shaft end, 4: Driven shaft, 4゛: Driven shaft rotation center, 5:
Driven shaft end, 12a, 12b: Groove, 14a, 14b: Driving side slide portion, 16a, 16b: Groove, 18a, 18b: Driven side slide portion, 20: Rotational force transmission member. Figure 1 Figure 2/ Figure 4

Claims (1)

[Claims] (1) A driving shaft end and a driven shaft end are arranged to face each other, and the driving shaft end has a groove on the end face opposite to the driven shaft end in a plane perpendicular to the rotation center direction of the driving shaft. A plurality of grooves are formed in parallel along the direction of the driven shaft, and a plurality of grooves are formed in the end of the driven shaft in parallel with each other, and the grooves are formed in the end of the driven shaft in a plane perpendicular to the direction of the rotation center of the driven shaft. A plurality of grooves are formed in parallel along a second direction that crosses the direction, and a flexible rotational force transmission member is interposed between the driving shaft end and the driven shaft end. The rotational force transmitting member is accommodated in each groove at the end of the driving shaft and is slidable in the first direction and toward the center of rotation of the driving shaft, and the rotational force transmitting member is accommodated in each groove at the end of the driven shaft. A shaft joint, comprising: a driven-side sliding portion that is accommodated in the shaft and is slidable in the second direction and in the direction of the rotation center of the driven shaft.