CA2085112A1 - Shaft coupling - Google Patents
Shaft couplingInfo
- Publication number
- CA2085112A1 CA2085112A1 CA002085112A CA2085112A CA2085112A1 CA 2085112 A1 CA2085112 A1 CA 2085112A1 CA 002085112 A CA002085112 A CA 002085112A CA 2085112 A CA2085112 A CA 2085112A CA 2085112 A1 CA2085112 A1 CA 2085112A1
- Authority
- CA
- Canada
- Prior art keywords
- shaft
- slide
- driving shaft
- driven shaft
- mount member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/02—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for connecting two abutting shafts or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D3/00—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
- F16D3/02—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
- F16D3/04—Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow radial displacement, e.g. Oldham couplings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
- F16D1/08—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key
- F16D1/0852—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft
- F16D1/0864—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end with clamping hub; with hub and longitudinal key with radial clamping between the mating surfaces of the hub and shaft due to tangential loading of the hub, e.g. a split hub
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
On the outer peripheral surface of the end portion 2 of a driving shaft, a mount member 6 made of metal at the side of the driving shaft is mounted having a pair of outer slide surfaces 10 running parallel to the X-Z plane. On the outer peripheral surface of the end portion 4 of a driven shaft, a mount member 8 made of metal at the side of the driven shaft is mounted having a pair of outer slide surfaces 12 running parallel to the Y-Z plane. Therebetween, the torque transmit-ting member 14 made of plastic is disposed being provided with a pair of inner slide surfaces 16 slidable relative to the pair of outer slide surfaces 10 at the driving side and a pair of inner slide surfaces 18 slidable relative to the pair of outer slide surfaces 12 at the driven side. The torque transmitting member is also provided with a wall 20 abuttable against the mount members 6,8 at the side of the driving shaft and driven shaft.
This shaft coupling allows the eccentricity, angular deviation and the axial movement between the driving shaft side and the driven shaft side to be effectively coped with while allowing the toque to be smoothly transmitted with a small loss, and is simple in construction and easy in assembly and maintenance.
On the outer peripheral surface of the end portion 2 of a driving shaft, a mount member 6 made of metal at the side of the driving shaft is mounted having a pair of outer slide surfaces 10 running parallel to the X-Z plane. On the outer peripheral surface of the end portion 4 of a driven shaft, a mount member 8 made of metal at the side of the driven shaft is mounted having a pair of outer slide surfaces 12 running parallel to the Y-Z plane. Therebetween, the torque transmit-ting member 14 made of plastic is disposed being provided with a pair of inner slide surfaces 16 slidable relative to the pair of outer slide surfaces 10 at the driving side and a pair of inner slide surfaces 18 slidable relative to the pair of outer slide surfaces 12 at the driven side. The torque transmitting member is also provided with a wall 20 abuttable against the mount members 6,8 at the side of the driving shaft and driven shaft.
This shaft coupling allows the eccentricity, angular deviation and the axial movement between the driving shaft side and the driven shaft side to be effectively coped with while allowing the toque to be smoothly transmitted with a small loss, and is simple in construction and easy in assembly and maintenance.
Description
SHAFT COUPLING
FIELD OF THE INVENTION
The present invention relates to a shaft coupling and, in particular, to a shaft coupling simple in construction and assembling which may excellently cope with the eccentricity, angle deviation and the axial movement between the driving shaft side and the driven shaft side.
BACKGROUND OF THE INVENTION
In various mechanisms for transmitting a rotational torque, the end portions of two rotating shafts are connected by means of a coupling. For example, the output rotating shaft of a motor and the input rotating shaft of a pump are connected by means of the coupling. In this case, it takes a considerable amount of labor to carefully install the motor and the pump so that the output rotating shaft of the motor and the input rotating shaft of the pump fully align with each other. Further, even if the installation is carried out - 20 with ample attention, some eccentricity and angular deviation remain between both rotating shafts and, further, vibrations take place at the motor and pump when they are actuated. In order to absorb these by the coupling portion, a flexible coupling using a flexible member such as a spring or rubber has conventionally been used. In addition, an Oldham coupling has been used as a coupling which may cope with the eccent-ricity, angular deviation and the axial movement. --In such a shaft coupling, in general, a proper mountmenlber has been mounted at the end portion of the driving shaft and at the end portion of the driven shaft respectively to couple those by means of a proper mechanism.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a shaft coupling of novel construction which may excellently cope with the eccentricity, the angular deviation and the axial movement between the driving shaft side and the driven shaft side and yet, which is simple in construction and easy to assemble and allows the torque transmitting mechanism to be miniaturized.
Another object of the present invention is to provide a shaft coupling having the foregoing novel construction and which can smoothly transmit the torque and is easy to maintain.
A still another object of the present invention is to provide a shaft coupling which allows the mount member to be mounted without working the shaft end portion in the form of a special shape.
According to the present invention, there is provided a shaft coupling in which:
the end portion of the driving shaft and the end portion of the driven shaft are disposed in an opposed manner;
a mount member is mounted at the side of the driving shaft on the outer peripheral surface of the end portion of the driving shaft, and a slide member having a pair of slide surfaces running parallel to a plane of first direction, which passes through the rotational axis of the driving shaft, is provided on the mount member at the side of the driving s~aft;
a mount member is mounted at the side of the driven shaft on the outer peripheral surface of the end portion of the driven shaft, and a slide member having a pair of slide surfaces running parallel to a plane of second direction, which passes through the rotational axis of the driven shaft, is provided on the mount member at the side of the driven shaft;
a torque transmitting member is disposed around the mount members at the side of the driving and driven shafts respective-ly, said torque transmitting member having a pair of first slide surfaces which are slidable within a plane parallel to the plane of first direction relative to the pair of slide surfaces of the mount member at the side of the driving shaft and a pair of second slide surfaces which is slidable within a plane parallel to the plane of second direction relative to the pair of slide surfaces of the mount member at the side of the driven shaft.
In the present invention, the foregoing transmitting member is preferably of cylindrical form.
In one embodiment of the present invention, the foregoing transmitting member has a wall inwardly protruding between the first slide surface and the second slide surface so that it intersects at a right angle with the axial direction and abuttable against the end portion of the driving shaft and/or the mount member at the side of the driving shaft and the end portion of the driven shaft and/or the mount member at the side of the driven shaft.
In anther embodiment of the present invention, at least the slide surface of the mount member at the side of the driving shaft and at least the slide surface of the mount member at the side of the driven shaft are each made of metal, and at least the first slide surface and the second slide surface of the transmitting member are each made of plastic.
In a still another embodiment of the present invention, the mount member at the side of the driving shaft takes the form of a substantially rectangular parallelepiped also serving as the slide member at the side of the driving shaft, and its two outer peripheral surfaces opposed to each other serve as the slide surface. The mount member at the side of the driven shaft takes the form of a substantially rectangular parallele-piped also serving as the slide member at the side of the driven shaft, and its two outer peripheral surfaces opposed to each other serve as the slide surface.
In a still another embodiment of the present invention, the mount member at the side of the driving shaft is removably mounted relative to the end portion of the driving shaft, and the mount member at the side of the driven shaft is removably mounted relative to the end portion of the driven shaft.
lS According to the present invention, the mount member at the side of the driving shaft and the mount member at the side of the driven shaft may be each mounted relative to the outer peripheral surface of the end portion of the driving shaft and the outer peripheral surface of the end portion of the driven shaft respectively by fastening to the cylindrical outer peripheral surface at the end portion of the shaft.
In the present invention, in order to restrict the position of the transmitting member as viewed in the axial direction, a stop at the side of the driving shaft and a stop at the side of the driven shaft may be removably mounted on the outer peripheral surface of the end portion of the driving shaft and on the outer peripheral surface of the end Fortion of the driven shaft respectivelY.
In addition, as an embodiment of the present invention, there is one in which the slide member at the side of the 2 ~ 1 2 driving shaft is removably mounted relative to the mount member at the side of the driving shaft while the slide member at the side of the driven shaft is removably mounted relative to the mount member at the side of the driven shaft.
According to the present invention, a removable replacement plate may be mounted on the silde surface of the slide member at the side of the driving shaft and on the silde surface of the slide member at the side of the driven shaft respectively.
Here, the foregoing transmitting member may be made of metal, and the foregoing replacement plate may be made of plastic.
In a certain embodiment of the present invention, the foregoing slide member at the side of the driving shaft extends from the driven side end surface of the mount member at the side of the driving shaft further toward the driven side, and the foregoing slide member at the side of the driven shaft extends from the driving side end surface of the mount member at the side of the driven shaft further toward the driving slde.
In another embodiment of the present invention, the slide member at the side of the driving shaft extends from the mount member at the side of the driving shaft only in the radial direction, and the slide member at the side of the driven shaft extends from the mount member at the side of the driven shaft only in the radial direction.
In the present invention, on the driving side end surface of the foregoing transmitting member, a member for restricting the position of the transmitting member as viewed in the axial direction and for abutting the mount member at the side of the driving shaft and /or the slide member at the side of the driving shaft may be removablY mounted, whereas, on the driven 2 ~ 2 side end surface of the foregoing transmitting member, a member for restricting the position of the transmitting member as viewed in the axial direction and for abutting the mount member at the side of the driven shaft and /or the slide member at the side of the driven shaft may be removably mounted.
Incidentally, in the present invention, the foregoing ; first direction and second direction preferably intersect at a right angle with each other.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is an exploded perspective view of a first embodi-ment of a shaft coupling according to the present invention;
Fig. 2 is a longitudinal cross-sectional view thereof when assembled;
Fig. 3 is a schematic explanatory view of an example of a torque transmitting mechanism embodying the shaft coupling according to this embodiment;
Figs. 4 and 5 are respectively a view of a modification of the first embodiment;
Fig. 6 is an exploded perspective view of a second embodi-ment of the shaft coupling according to the present invention;
Fig.7 is a longitudinal cross-sectional view thereof when assembled;
Fig. 8 is a view of the shaft coupling thereof as viewed from the driving side;
Fig. 9 is an exploded perspective view of a third embodi-ment of the shaft coupling according to the present invention;
Fig. 10 is a longitudinal cross-sectional view thereof when assembled;
Fig. 11 is a view of the shaft coupling thereof as viewed 2 ~ t~
from the driving side;
Fig. 12 is an exploded perspective view of a fourth embodi-ment of the shaft coupling according to the present invention;
Fig. 13 is a longitudinal cross-sectional view thereof when assembled;
Fig. 14 is a cross-sectional view thereof taken along line A-A;
Fig. 15 is an exploded perspective view of a fifth embodi-ment of the shaft coupling according to the present invention;
10Fig. 16 is a longitudinal cross-sectional view thereof when assembled;
Fig. 17 is a cross-sectional view thereof taken along line B-B;
Fig. 18 is an exploded perspective view of a sixth embodi-ment of the shaft coupling according to the present invention;
Fig. l9 is a perspective view thereof when assembled;
Fig. 20 is an exploded perspective view of a seventh embodiment of the shaft coupling according to the present invention; and 20Fig. 21 is an exPloded perspective view of an eighth embodiment of the shaft coupling according to the present nventlon.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
25Several specific embodiments of the present invention are hereinafter described with reference to the accompanying drawings.
Fig. 1 is an exploded perspective view of a first embodi-ment of the shaft coupling according to the present invention, and Fig. 2 is a longitudinal cross-sectional view thereof ~ ~ ~ ;5 ~
when assembled. In these figures, 2 deno-tes a cylindrical end portion of the driving shaft, and 2' the rotational axis of the driving shaft. Further, 4 denotes a cylindrical end portion of the driven shaft, and 4' the rotational axis of the driven shaft. The end portion 2 of the driving shaft and the end portion 4 of the driven shaft are each disposed in an opposed manner so that their rotational axes 2' and 4' align with each other in the direction of Z.
A mount member 6 made of metal at the side of the driving shaft is mounted on the outer peripheral surface of the end portion 2 of the driving shaft. The mount member has a through hole running in the direction of Z, the inner surface of which fits with the outer peripheral surface of the end portion of the driving shaft. In order to mount the mount member 6, a key or spline may be used, or it maY be mounted by pressing in without working the cylindrical outer peripheral surface ; of the end portion 2 of the driving shaft or after worked.
The mount member 6 at the side of the driving shaft takes the form of a substantially rectangular parallelepiped, the outer peripheral surface of which comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the pair of planar surfaces running parallel to the X-Z plane form an outer slide surfaces 10, the interval between which equals L.
Similarly, a mount member 8 made of metal at the side of the driven shaft is mounted on the outer peripheral surface of the end portion 4 of the driven shaft. The mount--member has a through hole running in the direction of Z, the inner surface of which fits with the outer peripheral surface of the end portion of the driven shaft. In order to mount the 9 2~ q ~
mount member 8, a key or spline may be used, or it may be mounted by pressing in without working the cylindrical outer peripheral surface of the end portion 4 of the driven shaft or after worked. The mount member 8 at the side of the driven shaft takes the form of a substantially rectangular parallele-piped, the outer peripheral surface of which comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the pair of planar surfaces running parallel to the Y-Z surface form outer slide surfaces 12, the interval between which equals L.
As described above, in this embodiment, the mount member at the side of the driving shaft also serves as the slide member at the side of the driving shaft, and the mount member at the side of the driven shaft also serves as the slide member at the side of the driven shaft.
14 denotes a torque transmitting member, which is posi-tioned around both the mount members 6 and 8 so that it covers those. At one portion (at the driving side) as viewed in the axial direction, it contacts with the mount member 6 at the side of the driving shaft and, at the other portion (at the driven side), it contacts with the mount member 8 at the side of the driven shaft. That is, the transmitting member 14 is cylindrical running in the direction of Z, on the inner surface of which a pair of planar surfaces 16 running parallel to the X-Z plane and a pair of planar surfaces 18 running parallel to the Y-Z plane are each formed at the side of the d-riving shaft and at the side of the driven shaft respectively. At the center thereof, as viewed in the direction of Z, a wall 20 within the X-Y plane protrudes toward the inner side. At the portion at the driving side relative to the wall 20, the pair of planar surfaces 16 running parallel to the X-Z plane each comprise a first inner slide surface slidably coming in contact with the outer slide surface 10 of the mount member at the side of the driving shaft, and the interval between the first inner slide surfaces equals L. In addition, at the portion at the driven side relative to the wall 20, the pair of planar surfaces 18 running parallel to the Y-Z plane each comprise a second inner slide surface slidably coming in contact with the outer slide surface 12 of the mount member at the side of the driven shaft, and the interval between the second inner slide surfaces equals L.
The foregoing transmitting member 14 is made of a plastic material, for which a synthetic resin such as, for example, a polyacetal resin or polyamide resin may be used, which exhibits a proper strength and flexibility and a proper slidability against the metallic material, for example, iron, of the mount members 6 and 8 at the side of the driving shaft and the driven shaft respectively. This transmitting member 14 made of plastic has a self-lubricity, and continuously lubri-cates the outer slide surface 10 of the mount member 6 and the outer slide surface 12 of the mount member 8 when they come in contact with each other.
As illustrated in Fig. 2, the wall 20 of the transmitting member 14 has a thickness of T" and the end portion 2 of the driving shaft and the end portion 4 of the driven shaft are opposedly disposed at the interval T2 (> T,). The range over which the transmitting member is shifted in the direction of Z is restricted by the wall 20 abutting against the mount member 6 or 8 so that the engagement of the transmitting member 14 and the mount members 6 and 8 may be held. Incidental-ly, the length of the transmitting member, as viewed in the direction of Z, equals T.
Thus, in this embodiment, when the first inner slide surface 16 at the driving side slides in the directions of X
and Z and is rotated with the direction of Y as its axis relative to the outer slide surface 10 of the mount member 6, the transmitting member 14 can be shifted relative to the mount member 6, and when the second inner slide surface 18 at the driven side slides in the directions of Y and Z and is rotated with the X direction as its axis relative to the outer slide surface 12 of the mount member 8, it can be shifted relative to the mount member 8.
In this embodiment, when the end portion 2 of the driving shaft is rotated, the torque is transmitted from the mount member 6 via the transmitting member 14 to the mount member 8 so that the end portion 4 of the driven shaft is rotated. If any eccentricity, angular deviation or axial movement take place to the end portions 2 and 4, as described above, they can be effectively coped with by the relative movement between the transmitting member 14 and the mount member 6 and the relative movement between the transmitting member 14 and the mount member 8. The interval T2 between the mount members 6 and 8 may be properly determined according to the magnitude of the expected eccentricity, angular deviation or axial movement and the thickness Tl of the wall 20. The same is the case with the interval between the pair of outer surfaces other than the outer slide surfaces of the outer peripheral surface of the mount members 6 and 8.
The foregoing shaft coupling according to the present ~ ~ ~o~
invention can be readily manufactured by assembling the members as illustrated in Fig. 1.
In this embodiment, since the mount member 6 at the side of the driving shaft is mounted on the outer peripheral surface of the end portion 2 of the driving shaft and the mount member 8 at the side of the driven shaft is mounted on the outer peripheral surface of the end portion 4 of the driven shaft, the interval T2 between the end portions 2 and 4 can be made small enough and, further, the length T of the transmitting member, as viewed in the direction of Z, can be shortened with the result that the length of the entire transmitting mechanism, as viewed in the axial direction, can be shortened and it can be miniaturized.
In addition, according to this embodiment, the wall 20 not only serves to limit the movement of the transmitting member 14 in the direction of Z, but also serves to improve the strength of the transmitting member.
According to this embodiment, since the transmitting member 14 has a proper flexibility, the transmission of the vibration between the driving shaft side and the driven shaft side can be inhibited and, further, the transmission of the torque can be smoothly changed when the load is abruptly changed.
In addition, according to the present invention, since the transmitting member 14 exhibits a self-lubricity when it comes in contact with the mount members 6 and 8, it is not necessary to use any lubricating oil, and its maintenance is easy.
Fig. 3 is a schematic explanatory view of an embodiment of the transmitting mechanism incorporating the shaft coupling 2 ~
according to the present invention, in which the end portion of the output rotating shaft of the motor M corresponds to the end portion 2 of the driving shaft of the shaft coupling C according to the present invention, and the end portion of the input rotating shaft of the pump P, which is the driven unit, corresponds to the end portion 4 of the driven shaft of the shaft coupling C according to the present invention.
When both shafts are coupled by means of the shaft coupling C, the mount member 6 is fixed to the end portion 2 of the output rotating shaft of the motor M, the mount member and the transmitting member 14 are made to fit, the transmitting member and the mount member 8 are made to fit and the end portion 4 of the input rotating shaft of the pump P is made to fit with the mount member for fixation by shifting the latter 4 up to a predetermined position in the axial direction.
At this time, it is not necessary to strictly remove the eccentricity, angular deviation and indexing of the position in the axial direction between the end portions 2 and 4, but the eccentricity may be 1 mm, the angular deviation may be 1 degree and the positional error in the axial direction may be 1 mm.
When the coupling by the shaft coupling is released, the reverse procedure to the foregoing may be followed.
Figs. 4 and 5 are respectively a view illustrating a modification of the first embodiment, Fig. 4 a view as viewed from the driving side and Fig. 5 a view asviewed from the driven side. ~~
In this modification, the interval between the pair of outer peripheral surfaces of the mount member 6, which run parallel to the Y-Z plane, is also set to L as the interval 2 ~
between the pair of outer slide surfaces 10, which run parallel to the X-Z plane. Further, the interval between the pair of outer peripheral surfaces of the mount member 8, which run parallel to the X-Z plane, is also set to L, as the interval between the pair of outer slide surfaces 12, which run parallel to the Y-Z plane. At the portion of the transmitting member 14 close to the driving side relative to the wall 20, the interval between the pair of inner surfaces intersecting at a right angle with the pair of first inner slide surfaces 16 is set to (L t a ) greater than L, and, at the portion thereof - close to the driven side relative to the wall 20, the interval between the pair of inner surfaces intersecting at a right angle with the pair of second inner slide surfaces 18 is set to (L + a ) greater than L.
In the embodiment as illustrated in Figs. l and 2, when the mount members 6 and 8 are made to fit with the transmitting member 14, it is necessary to take their orientation into account so that the outer slide surfaces of these mount members intersect at a right angle with each other. However, in this modification, since the first inner slide surface and the second inner slide surface preset a predetermined orientation with the transmitting member 14 and the two pairs of outer peripheral surfaces are each identical with the mount members 6 and 8, when the mount members 6 and 8 are made to fit to the transmitting member 14, it is not necessary to take the orientation into account.
Fig. 6 is an exploded perspective view of a second embodi-ment of the shaft coupling according to the present invention.
Fig. 7 is a longitudinal cross-sectional view thereof when assembled. Fig. 8 is a view of the shaft coupling according ~ ~ 3 .~
to the present invention as viewed from the driving side. In these figures, like signs are assigned to the members having a function similar to those of Figs. 1 through 5.
In this e~bodiment, the mount member 6 at the side of the driving shaft takes the form of a substantiallY cylindrical form, on the outer peripheral surface of which two sets of three protrusions 7 (slide members at the side of the driving shaft) protruding in the opposite directions relative to the Y direction are attached. On each protrusion 7, a pair of outer slide surfaces 10 running parallel to the Y-Z plane is formed. Likewise, the mount member 8 at the side of the driven shaft takes the form of a substantially cylindrical form, on the outer peripheral surface of which two sets of three protru-sions 9 (slide members at the side of the driven shaft) protru-ding in the opposite directions relative to the X directionare attached. On each protrusion 9, a pair of outer slide surfaces 12 running parallel to the X-Z plane is formed.
On the inner surface of the cylindrical transmitting member 14, at its portion close to the driving side relative to the wall 20 and at its portion close to the driven side relative to the wall 20, two kinds of channels 13, 15 extending in the Z direction are formed. Two sets of three channels 13 are each formed at a position opposed to each other in the Y
direction, and each channel 13 has a pair of first inner slide surfaces 16 each running parallel to the Y-Z plane.
Likewise, two sets of three channels 15 are each formed at positions opposed to each other in the X direction , an-d each channel 15 has a pair of second inner slide surfaces 18 running parallel to the X-Z plane.
At the portion close to the driving side relative to the 2 ~
wall 20, the protrusion 7 of the mount member at the side of the driving shaft is accommodated with the channel 13, and the outer slide surface 10 and the first inner slide surface 16 slidably come in contact with each other. On the other hand, at the portion close to the driven side relative to the wall 20, the protrusion 9 of the mount member at the side of ; the driven shaft is accommodated within the channel 15, and the outer slide surface 12 and the second inner slide surface 18 slidablY come in contact with each other.
The function of the shaft coupling according to this embodiment is basically the same as that of the shaft coupling according to the first embodiment.
Fig. 9 is an exploded perspective view illustrating a third embodiment of the shaft coupling according to the present invention. Fig. 10 is a longitudinal cross-sectional view thereof when assembled. Fig. 11 is a view of the shaft coupling according to this embodiment as viewed from the driving side.
In these figures, like signs are each assigned to the members having a function similar to those of Figs. 1 through 8.
In this embodiment, a slit is formed through the mount member 6 within a plane parallel to the Y-Z plane, and a portion adjacent to this slit is fastened by means of a bolt so that the mount member is fixed to the end portion 2 of the driving shaft. Likewise, a slit is formed through the mount member 8 within a plane parallel to the X-Z plane, and a portion adiacent to this slit is fastened by means of a bolt so that the mount member is fixed to the end portion 4-of the driven shaft.
In this embodiment, channels (slide members a-t the side of the driving shaft) 7a are formed on the mount member 6 at - 17 ~
the side of the driving shaft, on each of which 7a a pair of inner slide surfaces 10a is formed. Further, channels (slide members at the side of the driven shaft) 9a are formed on the mount member 8 at the side of the driven shaft, on each of which 9a a pair of inner slide surfaces 12a is formed. On the other hand, on the inner surface of the transmitting member 14, protrusions 13a are formed at the portion close to the driving side relative to the wall 20, each of which 13a has a pair of first outer slide surfaces 16a running parallel to the X-Z plane. Likewise, on the inner surface of the transmit-ting member 14, protrusions 15a are formed at the position close to the driven side relative to the wall 20, each of which 15a has a pair of second outer slide surfaces 18a running parallel to the Y-Z plane.
In addition, at the position close to the driving side relative to the wall 20, the protrusions 13a are accommodated within the channel 7a of the mount member at the side of the driving shaft, and the inner slide surface lOa and the first outer slide surface 16a slidably come in contact with each other. In contrast, at the portion close to the driven side relative to the wall 20, protrusions 15a are accommodated within the channel 9a of the mount member at the side of the driven shaft, and the inner slide surface 12a and the second outer slide surface 18a slidably come in contact with each other.
The function of the shaft coupling according to this embodiment is basically the same as that of the first and second embodiments. Further, in this embodiment, since, during assembly, the mount members 6, 8 are each fastened for fixation to the end portion 2 of the driving shaft and the end portion 4 of the driven shaft, it is not necessarY to align the phase (rotational angle) of the end portion 2 and the phase of the end portion 4. In addition, the end portions 2 and 4 require no special work on the outer peripheral surface, but may remain cylindrical.
Fig. 12 is an exploded perspective view illustrating a fourth embodiment of the shaft coupling according to the present invention. Fig. 13 is a longitudinal cross-sectional view thereof when assembled. Fig. 14 is a cross-sectional view thereof taken along line A-A. In these figures, like signs are each assigned to the member having a function similar to that of Figs. 1 through 11.
On the outer peripheral surface of the end portion 2, the mount member 6 made of metal is mounted, which has a through hole extending in the Z direction, the inner surface of which is made to fit with the outer peripheral surface of the end portion. As shown, on the mount member 6, a slit within a plane parallel to the Y-Z plane is formed so that it may reach the through hole from outside and, by fastening a ; 20 portion adjacent to the slit through a bolt 110 in the X
direction, the mount member 6 is mounted. The outer peripheral surface of the mount member 6 comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the former corresponds to the outer slide surface 107, the interval between which equals L.
Similarly, on the outer peripheral surface of the end portion 4, the mount member 8 made of metal is mounted, which has a through hole extending in the Z direction, and the inner surface of the through hole is made to fit with the outer peripheral surface of the end portion at the side of the driven shaft. As shown, on the mount member 8, a slit is formed within a plane parallel to the X-Z plane so that it may reach the foregoing through hole from outside and, by fastening a portion adjacent to this slit via a bolt 112 in the Y direction, the mount member 8 is mounted. The outer peripheral surface of the mount member 8 comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the latter corresponds to the outer slide surface lO9, the interval between which equals L.
As described above, in this embodiment, as in the first . embodiment, the mount member at the side of the driving shaft also serves as the slide member at the side of the driving shaft, and the mount member at the side of the driven shaft serves as the slide member at the side of the driven shaft.
The transmitting member 14 made of plastic is positioned around both the mount members 6 and 8 so that it may cover them and, at one portion, as viewed in the axial direction, it contacts with the mount member 6 while, at the other portion, contacting the mount member 8. That is, the transmitting member 14 is of cylindrical form as viewed in the Z direction, the inner surface of which comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane. The pair of planar surfaces running parallel to the X-Z plane comprises a first inner slide surface 115a slidably coming into contact wi--th the outer slide surface 107 of the mount member at the side of the driving shaft, and the interval between the first inner slide surfaces equals L. In addition, the pair of planar ~s~
surfaces running parallel to the Y-Z plane comprises a second inner slide surface 115b slidably coming into contact with the outer slide surface 109 of the mount member at the side of the driven shaft and a second outer slide surface 115b, and the interval between the second inner slide surfaces equals L.
As shown in Fig. 13, the end portions 2 and 4 are opposedly disposed at the interval T'. This interval T' maY be properly determined according to the expected magnitude of eccentricitY, angular deviation or the axial movement. Further, on the end portions 2 and 4, rubber stops 116, 118 are removably mounted, which restrict the position of the transmitting member 14, as viewed in the Z direction, to retain the engagement with the mount members 6 and 8.
The foregoing shaft coupling according to this embodiment may be readily manufactured by assembling the members as shown in Fig. 12. In particular, during this assembly, since the - mount members 6, 8 are each fastened for fixation to the end portions 2 and 4 respectively, it is not necessary to align the phase (rotational angle) of the end portions 2 and 4. In addition, the end portions 2 and 4 require no special work, but may left cylindrical. During disassembly, one of the stops 116, 118 is shifted in the Z direction so as to make distant from the transmitting member 14 and, then the transmit-ting member is shifted in the Z direction, after that, one ofthe end portions 2 and 4 is shifted by a distance approximately corresponding to the thickness of the mount members--6 or 8 (as measured in the Z direction) so that it is made distant from the other to slightly widen the interval between the end portions 2 and ~, through which the mount member 6 or 8 may 2 ~
be removed after they are released from the fastened condition.
The function of the shaft coupling according to this embodiment is basically the same as that of the shaft coupling according to the first embodiment.
Fig. 15 is an exploded perspective view of a fifth embodi-ment of the shaft coupling according to the present invention.
Fig. 16 is a longitudinal cross-sectional view thereof when assembled. Fig. 17 is a cross-sectional view thereof taken along line B-B. In these figures, like signs are each assigned to the member having the same function as those of Figs. 1 through 14.
This embodiment differs from the fourth embodiment only in the direction in which the slit of the mount member 6 extends and the direction in which the slit of the mount member 8 extends, and has the operation and effect similar to the fourth embodiment.
Fig. 18 is an exploded perspective view of a sixth embodi-ment of the shaft coupling according to the present invention.
Fig. 19 is a perspective view thereof when assembled. In these figures, like signs are each assigned to the members having the same function as in Figs. 1 through 17.
On the outer peripheral surface of the end portion 2, the mount member 6 at the side of the driving shaft, which is made of metal, is mounted. This mounting is achieved by means of any proper measures such as splining or pressing in so that the driven side end surface of the mount member 6 is set so as to lie in substantially the same plane as the~driven side end portion 2 of the driving shaft. On the outer peripheral surface of the mount member 6, two slide members 210a, 210b at the side of the driving shaft are integrally formed at the 2~5~2 symmetrical positions relative to the rotational axis 2' of the driving shaft. These slide members 210a, 210b extend from the driven side end surface of the mount member 6 at the side of the driving shaft further toward the driven side each having a pair of outer slide surfaces running parallel to the Y-Z plane. On each of these outer slide surfaces, a replacement plate 211 is removably mounted, which plate is replaced by a new one after worn.
Similarly, on the outer peripheral surface of the end portion 4 of the driven shaft, the mount member 8 at the side of the driven shaft is mounted. This mounting is carried out bY any proper measures such as splining or pressing in so that the driving side end surface of the mount member 8 is set so as to lie in substantially the same plane as the driving side end surface of the end portion 4 of the driven shaft. On the outer peripheral surface of the mount member 8, two slide members 212a, 212b are integrally formed at the symmetrical positions relative to the rotational axis 4' of the driven shaft. These slide members 212a, 212b extend from the driving side end surface of the mount member 8 at the side of the driven shaft further toward the driving side each having a pair of outer slide surfaces running parallel to the X-Z
plane. Further, on each of these outer slide surfaces, a replacement plate 211 is removably mounted, which plate is replaced by a new one after worn.
The transmitting member 14 lies around the mount members 6, 8, slide members 210a, 210b at the side of the driving shaft and slide members 212a, 212b at the side of the driven shaft so as to cover them. The transmitting member 14 is of cylindrical form extending in the Z direction, within which 2 ~
two first slide channels 216a, 216b having a pair of first inner slide surfaces running parallel to the Y-Z plane and two second slide channels 218a, 218b having a pair of second inner slide surfaces running parallel to the X-Z plane are formed. The inner slide surfaces of the first slide channels 216a, 216b are slidable against the replacement plate 211 of the slide members 210a, 210b at the side of the driving shaft within the Y-Z plane. Similarly, the inner slide surfaces of the second slide channels 218a, 218b are slidable against the replacement plate 211 of the slide members 212a, 212b at the side of the driven shaft within the X-Z plane. Incidentally, the dimension of the transmitting member 14 and others are set so that they are slidable.
On the end surface at the driving side of the transmitting member 14, an abutting member 220 at the driving side is removably mounted by mean of a screw. Similarly, on the driven side end surface of the transmitting member 14, an abutting member 222 at the driven side is removably mounted by means of a screw. These abutting members restricts the position of the transmitting member as viewed in the axial direction by the abutment of the driving side end surface of the mount member 6 and the driven side end surface of the mount member 8. Of course, the distance between these abutting members 220, 222 is set greater than the expected maximum distance between the driving side end surface of the mount member 6 and the driven side end surface of the mount member 8.
As the foregoing replacement plate 211, a relatively soft metal such as bronze or the like may be used, or an oil containing alloy or plastic material may be used in order to achieve the self-lubricity. As the plastic material, a synthetic resin having a proper slidability relative to the metallic material of the transmitting member 14, for example, iron, proper strength and further a proper flexibility, such as, for example, polyacetal resin or polyamide resin may be used.
Thus, in this embodiment, since the first slide channels 216a, 216b slide in the Y and Z directions relative to the replacement plate 211 of the slide members 210a, 210b at the side of the driving shaft and is rotated with the X direction as its axis, the transmitting member 14 can be shifted relative to the mount member 6 at the side of the driving shaft and, since the second slide channels 218a, 218b slide in the X and Z directions relative to the replacement plate 211 of the slide members 212a, 212b at the side of the driven shaft and is rotated with the Y direction as their axis, it can be shifted relative to the mount member 8at the side of the driven shaft.
The forgoing shaft coupling according to this embodiment can be readily manufactured by assembling the members as shown in Fig. 18. The replacement of the plate 211 can be immediately carried out after one of the abutting members 220 and 222 is removed and the transmitting member 14 is shifted in the Z direction.
If, in this embodiment, as the replacement plate 211, one made of a plastic material is to be used, since this has a proper flexibility, the transmission of vibration between the driving shaft side and the driven shaft side can be sup-pressed and the torque transmission can be smoothly changed when the load is abruptly changed. Further, since the self-lubricity can result when it comes in slidable contact with the transmitting member 14, there is no need to use the lubri-2 ~ 3~ id cating oil, which simplifies the mainlenance.
Further, in this embodiment, since the slide members210a, 210b at the side of the driving shaft extend further toward the driven side relative to the driven side end surface of the mount member 6 at the side of the driving shaft and the slide members 212a, 212b at the side of the driven shaft extend further toward the driving side relative to the driving side end surface of the mount member 8 at the side of the driven shaft, the area over which they come in contact with the transmitting member 14 is great and the load per unit area is small leading to a small wear.
The function of the shaft coupling according to this embodiment is basicallY the same as that of the shaft coupling according to the second embodiment.
Fig. 20 is an exploded perspective view of a seventh embodiment of the shaft coupling according to the present invention, in which like signs are each assigned to the member having the same function as in Figs. 1 through 19.
This embodiment differs from the sixth embodiment only in that four slide members 210a-1, 210a-2, 210b-1, 210b-2 at the side of the driving shaft and four slide members 212a-1, 212a-2, 212b-1, 212b-2 at the side of the driven shaft are formed and, corresponding thereto, four first slide channels 216a-1, 216a-2, 216b-1, 216b-2 and four second slide channels 218a-1, 218a-2, 218b-1, 218b-2 are also formed on the transmit-ting member 14. This embodiment provides an operation and effect similar to those of the sixth embodiment, and further the area over which the slide members and the transmitting menlber 14 come in contact with each other is great. Therefore, a further great torque can be transmitted.
Fig. 21 is an exploded perSPective view of an eighth embodiment of the shaft coupling according to the present invention, in which like signs are each assigned to the members having the same function as that of Figs. 1 through 20.
This embodiment only differs from the sixth embodiment in that the slide members 210a, 210b at the side of the driving shaft and the slide members 212a, 212b at the side of the driven shaft are each mounted to the mount members 6 and 8 by means of a screw, and that no replacement plate is mounted to these slide members and the slide members 210a, 210b and the slide members 212a, 212b extend from the mount members 6 and 8 only in the radial direction. This embodiment provides an operation and effect similar to those of the sixth embodiment, and the slide member at the side of the driving shaft does not extend toward the driven side relative to the driven side end surface of the mount member at the side of the driving shaft, and the slide member at the side of the driven shaft does not extend toward the driving side relative of the driving side end surface of the mount member at the side of the driven shaft. Therefore, with these slide members and the transmitting member 14 disengaged, the end portion 2 of the driving shaft and the end portion 4 of the driven shaft can be independently rotated.
In the present invention, one of the slide member and the transmitting member may be made of metal, and the other may be made of plastic, or both of them may be made of metal or plastic.
As described above, the present invention allows the eccentricity, angular deviation and the axial movement between the driving shaft side and the driven shaft side to be excel-lently coped with while allowing t;he torque to be smoothly transmitted with a small loss. As a result, a shaft coupling which is simple in construction and easy in assembly and maintenance can be provided.
The shaft coupling according to the present invention can be manufactured ranging from ones of small diameter (for example, on the order of 20 mm) up to ones of large diameter (for example, on the order of 600 mm) so that it may be used in various torque transmitting mechanisms.
FIELD OF THE INVENTION
The present invention relates to a shaft coupling and, in particular, to a shaft coupling simple in construction and assembling which may excellently cope with the eccentricity, angle deviation and the axial movement between the driving shaft side and the driven shaft side.
BACKGROUND OF THE INVENTION
In various mechanisms for transmitting a rotational torque, the end portions of two rotating shafts are connected by means of a coupling. For example, the output rotating shaft of a motor and the input rotating shaft of a pump are connected by means of the coupling. In this case, it takes a considerable amount of labor to carefully install the motor and the pump so that the output rotating shaft of the motor and the input rotating shaft of the pump fully align with each other. Further, even if the installation is carried out - 20 with ample attention, some eccentricity and angular deviation remain between both rotating shafts and, further, vibrations take place at the motor and pump when they are actuated. In order to absorb these by the coupling portion, a flexible coupling using a flexible member such as a spring or rubber has conventionally been used. In addition, an Oldham coupling has been used as a coupling which may cope with the eccent-ricity, angular deviation and the axial movement. --In such a shaft coupling, in general, a proper mountmenlber has been mounted at the end portion of the driving shaft and at the end portion of the driven shaft respectively to couple those by means of a proper mechanism.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a shaft coupling of novel construction which may excellently cope with the eccentricity, the angular deviation and the axial movement between the driving shaft side and the driven shaft side and yet, which is simple in construction and easy to assemble and allows the torque transmitting mechanism to be miniaturized.
Another object of the present invention is to provide a shaft coupling having the foregoing novel construction and which can smoothly transmit the torque and is easy to maintain.
A still another object of the present invention is to provide a shaft coupling which allows the mount member to be mounted without working the shaft end portion in the form of a special shape.
According to the present invention, there is provided a shaft coupling in which:
the end portion of the driving shaft and the end portion of the driven shaft are disposed in an opposed manner;
a mount member is mounted at the side of the driving shaft on the outer peripheral surface of the end portion of the driving shaft, and a slide member having a pair of slide surfaces running parallel to a plane of first direction, which passes through the rotational axis of the driving shaft, is provided on the mount member at the side of the driving s~aft;
a mount member is mounted at the side of the driven shaft on the outer peripheral surface of the end portion of the driven shaft, and a slide member having a pair of slide surfaces running parallel to a plane of second direction, which passes through the rotational axis of the driven shaft, is provided on the mount member at the side of the driven shaft;
a torque transmitting member is disposed around the mount members at the side of the driving and driven shafts respective-ly, said torque transmitting member having a pair of first slide surfaces which are slidable within a plane parallel to the plane of first direction relative to the pair of slide surfaces of the mount member at the side of the driving shaft and a pair of second slide surfaces which is slidable within a plane parallel to the plane of second direction relative to the pair of slide surfaces of the mount member at the side of the driven shaft.
In the present invention, the foregoing transmitting member is preferably of cylindrical form.
In one embodiment of the present invention, the foregoing transmitting member has a wall inwardly protruding between the first slide surface and the second slide surface so that it intersects at a right angle with the axial direction and abuttable against the end portion of the driving shaft and/or the mount member at the side of the driving shaft and the end portion of the driven shaft and/or the mount member at the side of the driven shaft.
In anther embodiment of the present invention, at least the slide surface of the mount member at the side of the driving shaft and at least the slide surface of the mount member at the side of the driven shaft are each made of metal, and at least the first slide surface and the second slide surface of the transmitting member are each made of plastic.
In a still another embodiment of the present invention, the mount member at the side of the driving shaft takes the form of a substantially rectangular parallelepiped also serving as the slide member at the side of the driving shaft, and its two outer peripheral surfaces opposed to each other serve as the slide surface. The mount member at the side of the driven shaft takes the form of a substantially rectangular parallele-piped also serving as the slide member at the side of the driven shaft, and its two outer peripheral surfaces opposed to each other serve as the slide surface.
In a still another embodiment of the present invention, the mount member at the side of the driving shaft is removably mounted relative to the end portion of the driving shaft, and the mount member at the side of the driven shaft is removably mounted relative to the end portion of the driven shaft.
lS According to the present invention, the mount member at the side of the driving shaft and the mount member at the side of the driven shaft may be each mounted relative to the outer peripheral surface of the end portion of the driving shaft and the outer peripheral surface of the end portion of the driven shaft respectively by fastening to the cylindrical outer peripheral surface at the end portion of the shaft.
In the present invention, in order to restrict the position of the transmitting member as viewed in the axial direction, a stop at the side of the driving shaft and a stop at the side of the driven shaft may be removably mounted on the outer peripheral surface of the end portion of the driving shaft and on the outer peripheral surface of the end Fortion of the driven shaft respectivelY.
In addition, as an embodiment of the present invention, there is one in which the slide member at the side of the 2 ~ 1 2 driving shaft is removably mounted relative to the mount member at the side of the driving shaft while the slide member at the side of the driven shaft is removably mounted relative to the mount member at the side of the driven shaft.
According to the present invention, a removable replacement plate may be mounted on the silde surface of the slide member at the side of the driving shaft and on the silde surface of the slide member at the side of the driven shaft respectively.
Here, the foregoing transmitting member may be made of metal, and the foregoing replacement plate may be made of plastic.
In a certain embodiment of the present invention, the foregoing slide member at the side of the driving shaft extends from the driven side end surface of the mount member at the side of the driving shaft further toward the driven side, and the foregoing slide member at the side of the driven shaft extends from the driving side end surface of the mount member at the side of the driven shaft further toward the driving slde.
In another embodiment of the present invention, the slide member at the side of the driving shaft extends from the mount member at the side of the driving shaft only in the radial direction, and the slide member at the side of the driven shaft extends from the mount member at the side of the driven shaft only in the radial direction.
In the present invention, on the driving side end surface of the foregoing transmitting member, a member for restricting the position of the transmitting member as viewed in the axial direction and for abutting the mount member at the side of the driving shaft and /or the slide member at the side of the driving shaft may be removablY mounted, whereas, on the driven 2 ~ 2 side end surface of the foregoing transmitting member, a member for restricting the position of the transmitting member as viewed in the axial direction and for abutting the mount member at the side of the driven shaft and /or the slide member at the side of the driven shaft may be removably mounted.
Incidentally, in the present invention, the foregoing ; first direction and second direction preferably intersect at a right angle with each other.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 is an exploded perspective view of a first embodi-ment of a shaft coupling according to the present invention;
Fig. 2 is a longitudinal cross-sectional view thereof when assembled;
Fig. 3 is a schematic explanatory view of an example of a torque transmitting mechanism embodying the shaft coupling according to this embodiment;
Figs. 4 and 5 are respectively a view of a modification of the first embodiment;
Fig. 6 is an exploded perspective view of a second embodi-ment of the shaft coupling according to the present invention;
Fig.7 is a longitudinal cross-sectional view thereof when assembled;
Fig. 8 is a view of the shaft coupling thereof as viewed from the driving side;
Fig. 9 is an exploded perspective view of a third embodi-ment of the shaft coupling according to the present invention;
Fig. 10 is a longitudinal cross-sectional view thereof when assembled;
Fig. 11 is a view of the shaft coupling thereof as viewed 2 ~ t~
from the driving side;
Fig. 12 is an exploded perspective view of a fourth embodi-ment of the shaft coupling according to the present invention;
Fig. 13 is a longitudinal cross-sectional view thereof when assembled;
Fig. 14 is a cross-sectional view thereof taken along line A-A;
Fig. 15 is an exploded perspective view of a fifth embodi-ment of the shaft coupling according to the present invention;
10Fig. 16 is a longitudinal cross-sectional view thereof when assembled;
Fig. 17 is a cross-sectional view thereof taken along line B-B;
Fig. 18 is an exploded perspective view of a sixth embodi-ment of the shaft coupling according to the present invention;
Fig. l9 is a perspective view thereof when assembled;
Fig. 20 is an exploded perspective view of a seventh embodiment of the shaft coupling according to the present invention; and 20Fig. 21 is an exPloded perspective view of an eighth embodiment of the shaft coupling according to the present nventlon.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
25Several specific embodiments of the present invention are hereinafter described with reference to the accompanying drawings.
Fig. 1 is an exploded perspective view of a first embodi-ment of the shaft coupling according to the present invention, and Fig. 2 is a longitudinal cross-sectional view thereof ~ ~ ~ ;5 ~
when assembled. In these figures, 2 deno-tes a cylindrical end portion of the driving shaft, and 2' the rotational axis of the driving shaft. Further, 4 denotes a cylindrical end portion of the driven shaft, and 4' the rotational axis of the driven shaft. The end portion 2 of the driving shaft and the end portion 4 of the driven shaft are each disposed in an opposed manner so that their rotational axes 2' and 4' align with each other in the direction of Z.
A mount member 6 made of metal at the side of the driving shaft is mounted on the outer peripheral surface of the end portion 2 of the driving shaft. The mount member has a through hole running in the direction of Z, the inner surface of which fits with the outer peripheral surface of the end portion of the driving shaft. In order to mount the mount member 6, a key or spline may be used, or it maY be mounted by pressing in without working the cylindrical outer peripheral surface ; of the end portion 2 of the driving shaft or after worked.
The mount member 6 at the side of the driving shaft takes the form of a substantially rectangular parallelepiped, the outer peripheral surface of which comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the pair of planar surfaces running parallel to the X-Z plane form an outer slide surfaces 10, the interval between which equals L.
Similarly, a mount member 8 made of metal at the side of the driven shaft is mounted on the outer peripheral surface of the end portion 4 of the driven shaft. The mount--member has a through hole running in the direction of Z, the inner surface of which fits with the outer peripheral surface of the end portion of the driven shaft. In order to mount the 9 2~ q ~
mount member 8, a key or spline may be used, or it may be mounted by pressing in without working the cylindrical outer peripheral surface of the end portion 4 of the driven shaft or after worked. The mount member 8 at the side of the driven shaft takes the form of a substantially rectangular parallele-piped, the outer peripheral surface of which comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the pair of planar surfaces running parallel to the Y-Z surface form outer slide surfaces 12, the interval between which equals L.
As described above, in this embodiment, the mount member at the side of the driving shaft also serves as the slide member at the side of the driving shaft, and the mount member at the side of the driven shaft also serves as the slide member at the side of the driven shaft.
14 denotes a torque transmitting member, which is posi-tioned around both the mount members 6 and 8 so that it covers those. At one portion (at the driving side) as viewed in the axial direction, it contacts with the mount member 6 at the side of the driving shaft and, at the other portion (at the driven side), it contacts with the mount member 8 at the side of the driven shaft. That is, the transmitting member 14 is cylindrical running in the direction of Z, on the inner surface of which a pair of planar surfaces 16 running parallel to the X-Z plane and a pair of planar surfaces 18 running parallel to the Y-Z plane are each formed at the side of the d-riving shaft and at the side of the driven shaft respectively. At the center thereof, as viewed in the direction of Z, a wall 20 within the X-Y plane protrudes toward the inner side. At the portion at the driving side relative to the wall 20, the pair of planar surfaces 16 running parallel to the X-Z plane each comprise a first inner slide surface slidably coming in contact with the outer slide surface 10 of the mount member at the side of the driving shaft, and the interval between the first inner slide surfaces equals L. In addition, at the portion at the driven side relative to the wall 20, the pair of planar surfaces 18 running parallel to the Y-Z plane each comprise a second inner slide surface slidably coming in contact with the outer slide surface 12 of the mount member at the side of the driven shaft, and the interval between the second inner slide surfaces equals L.
The foregoing transmitting member 14 is made of a plastic material, for which a synthetic resin such as, for example, a polyacetal resin or polyamide resin may be used, which exhibits a proper strength and flexibility and a proper slidability against the metallic material, for example, iron, of the mount members 6 and 8 at the side of the driving shaft and the driven shaft respectively. This transmitting member 14 made of plastic has a self-lubricity, and continuously lubri-cates the outer slide surface 10 of the mount member 6 and the outer slide surface 12 of the mount member 8 when they come in contact with each other.
As illustrated in Fig. 2, the wall 20 of the transmitting member 14 has a thickness of T" and the end portion 2 of the driving shaft and the end portion 4 of the driven shaft are opposedly disposed at the interval T2 (> T,). The range over which the transmitting member is shifted in the direction of Z is restricted by the wall 20 abutting against the mount member 6 or 8 so that the engagement of the transmitting member 14 and the mount members 6 and 8 may be held. Incidental-ly, the length of the transmitting member, as viewed in the direction of Z, equals T.
Thus, in this embodiment, when the first inner slide surface 16 at the driving side slides in the directions of X
and Z and is rotated with the direction of Y as its axis relative to the outer slide surface 10 of the mount member 6, the transmitting member 14 can be shifted relative to the mount member 6, and when the second inner slide surface 18 at the driven side slides in the directions of Y and Z and is rotated with the X direction as its axis relative to the outer slide surface 12 of the mount member 8, it can be shifted relative to the mount member 8.
In this embodiment, when the end portion 2 of the driving shaft is rotated, the torque is transmitted from the mount member 6 via the transmitting member 14 to the mount member 8 so that the end portion 4 of the driven shaft is rotated. If any eccentricity, angular deviation or axial movement take place to the end portions 2 and 4, as described above, they can be effectively coped with by the relative movement between the transmitting member 14 and the mount member 6 and the relative movement between the transmitting member 14 and the mount member 8. The interval T2 between the mount members 6 and 8 may be properly determined according to the magnitude of the expected eccentricity, angular deviation or axial movement and the thickness Tl of the wall 20. The same is the case with the interval between the pair of outer surfaces other than the outer slide surfaces of the outer peripheral surface of the mount members 6 and 8.
The foregoing shaft coupling according to the present ~ ~ ~o~
invention can be readily manufactured by assembling the members as illustrated in Fig. 1.
In this embodiment, since the mount member 6 at the side of the driving shaft is mounted on the outer peripheral surface of the end portion 2 of the driving shaft and the mount member 8 at the side of the driven shaft is mounted on the outer peripheral surface of the end portion 4 of the driven shaft, the interval T2 between the end portions 2 and 4 can be made small enough and, further, the length T of the transmitting member, as viewed in the direction of Z, can be shortened with the result that the length of the entire transmitting mechanism, as viewed in the axial direction, can be shortened and it can be miniaturized.
In addition, according to this embodiment, the wall 20 not only serves to limit the movement of the transmitting member 14 in the direction of Z, but also serves to improve the strength of the transmitting member.
According to this embodiment, since the transmitting member 14 has a proper flexibility, the transmission of the vibration between the driving shaft side and the driven shaft side can be inhibited and, further, the transmission of the torque can be smoothly changed when the load is abruptly changed.
In addition, according to the present invention, since the transmitting member 14 exhibits a self-lubricity when it comes in contact with the mount members 6 and 8, it is not necessary to use any lubricating oil, and its maintenance is easy.
Fig. 3 is a schematic explanatory view of an embodiment of the transmitting mechanism incorporating the shaft coupling 2 ~
according to the present invention, in which the end portion of the output rotating shaft of the motor M corresponds to the end portion 2 of the driving shaft of the shaft coupling C according to the present invention, and the end portion of the input rotating shaft of the pump P, which is the driven unit, corresponds to the end portion 4 of the driven shaft of the shaft coupling C according to the present invention.
When both shafts are coupled by means of the shaft coupling C, the mount member 6 is fixed to the end portion 2 of the output rotating shaft of the motor M, the mount member and the transmitting member 14 are made to fit, the transmitting member and the mount member 8 are made to fit and the end portion 4 of the input rotating shaft of the pump P is made to fit with the mount member for fixation by shifting the latter 4 up to a predetermined position in the axial direction.
At this time, it is not necessary to strictly remove the eccentricity, angular deviation and indexing of the position in the axial direction between the end portions 2 and 4, but the eccentricity may be 1 mm, the angular deviation may be 1 degree and the positional error in the axial direction may be 1 mm.
When the coupling by the shaft coupling is released, the reverse procedure to the foregoing may be followed.
Figs. 4 and 5 are respectively a view illustrating a modification of the first embodiment, Fig. 4 a view as viewed from the driving side and Fig. 5 a view asviewed from the driven side. ~~
In this modification, the interval between the pair of outer peripheral surfaces of the mount member 6, which run parallel to the Y-Z plane, is also set to L as the interval 2 ~
between the pair of outer slide surfaces 10, which run parallel to the X-Z plane. Further, the interval between the pair of outer peripheral surfaces of the mount member 8, which run parallel to the X-Z plane, is also set to L, as the interval between the pair of outer slide surfaces 12, which run parallel to the Y-Z plane. At the portion of the transmitting member 14 close to the driving side relative to the wall 20, the interval between the pair of inner surfaces intersecting at a right angle with the pair of first inner slide surfaces 16 is set to (L t a ) greater than L, and, at the portion thereof - close to the driven side relative to the wall 20, the interval between the pair of inner surfaces intersecting at a right angle with the pair of second inner slide surfaces 18 is set to (L + a ) greater than L.
In the embodiment as illustrated in Figs. l and 2, when the mount members 6 and 8 are made to fit with the transmitting member 14, it is necessary to take their orientation into account so that the outer slide surfaces of these mount members intersect at a right angle with each other. However, in this modification, since the first inner slide surface and the second inner slide surface preset a predetermined orientation with the transmitting member 14 and the two pairs of outer peripheral surfaces are each identical with the mount members 6 and 8, when the mount members 6 and 8 are made to fit to the transmitting member 14, it is not necessary to take the orientation into account.
Fig. 6 is an exploded perspective view of a second embodi-ment of the shaft coupling according to the present invention.
Fig. 7 is a longitudinal cross-sectional view thereof when assembled. Fig. 8 is a view of the shaft coupling according ~ ~ 3 .~
to the present invention as viewed from the driving side. In these figures, like signs are assigned to the members having a function similar to those of Figs. 1 through 5.
In this e~bodiment, the mount member 6 at the side of the driving shaft takes the form of a substantiallY cylindrical form, on the outer peripheral surface of which two sets of three protrusions 7 (slide members at the side of the driving shaft) protruding in the opposite directions relative to the Y direction are attached. On each protrusion 7, a pair of outer slide surfaces 10 running parallel to the Y-Z plane is formed. Likewise, the mount member 8 at the side of the driven shaft takes the form of a substantially cylindrical form, on the outer peripheral surface of which two sets of three protru-sions 9 (slide members at the side of the driven shaft) protru-ding in the opposite directions relative to the X directionare attached. On each protrusion 9, a pair of outer slide surfaces 12 running parallel to the X-Z plane is formed.
On the inner surface of the cylindrical transmitting member 14, at its portion close to the driving side relative to the wall 20 and at its portion close to the driven side relative to the wall 20, two kinds of channels 13, 15 extending in the Z direction are formed. Two sets of three channels 13 are each formed at a position opposed to each other in the Y
direction, and each channel 13 has a pair of first inner slide surfaces 16 each running parallel to the Y-Z plane.
Likewise, two sets of three channels 15 are each formed at positions opposed to each other in the X direction , an-d each channel 15 has a pair of second inner slide surfaces 18 running parallel to the X-Z plane.
At the portion close to the driving side relative to the 2 ~
wall 20, the protrusion 7 of the mount member at the side of the driving shaft is accommodated with the channel 13, and the outer slide surface 10 and the first inner slide surface 16 slidably come in contact with each other. On the other hand, at the portion close to the driven side relative to the wall 20, the protrusion 9 of the mount member at the side of ; the driven shaft is accommodated within the channel 15, and the outer slide surface 12 and the second inner slide surface 18 slidablY come in contact with each other.
The function of the shaft coupling according to this embodiment is basically the same as that of the shaft coupling according to the first embodiment.
Fig. 9 is an exploded perspective view illustrating a third embodiment of the shaft coupling according to the present invention. Fig. 10 is a longitudinal cross-sectional view thereof when assembled. Fig. 11 is a view of the shaft coupling according to this embodiment as viewed from the driving side.
In these figures, like signs are each assigned to the members having a function similar to those of Figs. 1 through 8.
In this embodiment, a slit is formed through the mount member 6 within a plane parallel to the Y-Z plane, and a portion adjacent to this slit is fastened by means of a bolt so that the mount member is fixed to the end portion 2 of the driving shaft. Likewise, a slit is formed through the mount member 8 within a plane parallel to the X-Z plane, and a portion adiacent to this slit is fastened by means of a bolt so that the mount member is fixed to the end portion 4-of the driven shaft.
In this embodiment, channels (slide members a-t the side of the driving shaft) 7a are formed on the mount member 6 at - 17 ~
the side of the driving shaft, on each of which 7a a pair of inner slide surfaces 10a is formed. Further, channels (slide members at the side of the driven shaft) 9a are formed on the mount member 8 at the side of the driven shaft, on each of which 9a a pair of inner slide surfaces 12a is formed. On the other hand, on the inner surface of the transmitting member 14, protrusions 13a are formed at the portion close to the driving side relative to the wall 20, each of which 13a has a pair of first outer slide surfaces 16a running parallel to the X-Z plane. Likewise, on the inner surface of the transmit-ting member 14, protrusions 15a are formed at the position close to the driven side relative to the wall 20, each of which 15a has a pair of second outer slide surfaces 18a running parallel to the Y-Z plane.
In addition, at the position close to the driving side relative to the wall 20, the protrusions 13a are accommodated within the channel 7a of the mount member at the side of the driving shaft, and the inner slide surface lOa and the first outer slide surface 16a slidably come in contact with each other. In contrast, at the portion close to the driven side relative to the wall 20, protrusions 15a are accommodated within the channel 9a of the mount member at the side of the driven shaft, and the inner slide surface 12a and the second outer slide surface 18a slidably come in contact with each other.
The function of the shaft coupling according to this embodiment is basically the same as that of the first and second embodiments. Further, in this embodiment, since, during assembly, the mount members 6, 8 are each fastened for fixation to the end portion 2 of the driving shaft and the end portion 4 of the driven shaft, it is not necessarY to align the phase (rotational angle) of the end portion 2 and the phase of the end portion 4. In addition, the end portions 2 and 4 require no special work on the outer peripheral surface, but may remain cylindrical.
Fig. 12 is an exploded perspective view illustrating a fourth embodiment of the shaft coupling according to the present invention. Fig. 13 is a longitudinal cross-sectional view thereof when assembled. Fig. 14 is a cross-sectional view thereof taken along line A-A. In these figures, like signs are each assigned to the member having a function similar to that of Figs. 1 through 11.
On the outer peripheral surface of the end portion 2, the mount member 6 made of metal is mounted, which has a through hole extending in the Z direction, the inner surface of which is made to fit with the outer peripheral surface of the end portion. As shown, on the mount member 6, a slit within a plane parallel to the Y-Z plane is formed so that it may reach the through hole from outside and, by fastening a ; 20 portion adjacent to the slit through a bolt 110 in the X
direction, the mount member 6 is mounted. The outer peripheral surface of the mount member 6 comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the former corresponds to the outer slide surface 107, the interval between which equals L.
Similarly, on the outer peripheral surface of the end portion 4, the mount member 8 made of metal is mounted, which has a through hole extending in the Z direction, and the inner surface of the through hole is made to fit with the outer peripheral surface of the end portion at the side of the driven shaft. As shown, on the mount member 8, a slit is formed within a plane parallel to the X-Z plane so that it may reach the foregoing through hole from outside and, by fastening a portion adjacent to this slit via a bolt 112 in the Y direction, the mount member 8 is mounted. The outer peripheral surface of the mount member 8 comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane, among which the latter corresponds to the outer slide surface lO9, the interval between which equals L.
As described above, in this embodiment, as in the first . embodiment, the mount member at the side of the driving shaft also serves as the slide member at the side of the driving shaft, and the mount member at the side of the driven shaft serves as the slide member at the side of the driven shaft.
The transmitting member 14 made of plastic is positioned around both the mount members 6 and 8 so that it may cover them and, at one portion, as viewed in the axial direction, it contacts with the mount member 6 while, at the other portion, contacting the mount member 8. That is, the transmitting member 14 is of cylindrical form as viewed in the Z direction, the inner surface of which comprises a pair of planar surfaces running parallel to the X-Z plane and a pair of planar surfaces running parallel to the Y-Z plane. The pair of planar surfaces running parallel to the X-Z plane comprises a first inner slide surface 115a slidably coming into contact wi--th the outer slide surface 107 of the mount member at the side of the driving shaft, and the interval between the first inner slide surfaces equals L. In addition, the pair of planar ~s~
surfaces running parallel to the Y-Z plane comprises a second inner slide surface 115b slidably coming into contact with the outer slide surface 109 of the mount member at the side of the driven shaft and a second outer slide surface 115b, and the interval between the second inner slide surfaces equals L.
As shown in Fig. 13, the end portions 2 and 4 are opposedly disposed at the interval T'. This interval T' maY be properly determined according to the expected magnitude of eccentricitY, angular deviation or the axial movement. Further, on the end portions 2 and 4, rubber stops 116, 118 are removably mounted, which restrict the position of the transmitting member 14, as viewed in the Z direction, to retain the engagement with the mount members 6 and 8.
The foregoing shaft coupling according to this embodiment may be readily manufactured by assembling the members as shown in Fig. 12. In particular, during this assembly, since the - mount members 6, 8 are each fastened for fixation to the end portions 2 and 4 respectively, it is not necessary to align the phase (rotational angle) of the end portions 2 and 4. In addition, the end portions 2 and 4 require no special work, but may left cylindrical. During disassembly, one of the stops 116, 118 is shifted in the Z direction so as to make distant from the transmitting member 14 and, then the transmit-ting member is shifted in the Z direction, after that, one ofthe end portions 2 and 4 is shifted by a distance approximately corresponding to the thickness of the mount members--6 or 8 (as measured in the Z direction) so that it is made distant from the other to slightly widen the interval between the end portions 2 and ~, through which the mount member 6 or 8 may 2 ~
be removed after they are released from the fastened condition.
The function of the shaft coupling according to this embodiment is basically the same as that of the shaft coupling according to the first embodiment.
Fig. 15 is an exploded perspective view of a fifth embodi-ment of the shaft coupling according to the present invention.
Fig. 16 is a longitudinal cross-sectional view thereof when assembled. Fig. 17 is a cross-sectional view thereof taken along line B-B. In these figures, like signs are each assigned to the member having the same function as those of Figs. 1 through 14.
This embodiment differs from the fourth embodiment only in the direction in which the slit of the mount member 6 extends and the direction in which the slit of the mount member 8 extends, and has the operation and effect similar to the fourth embodiment.
Fig. 18 is an exploded perspective view of a sixth embodi-ment of the shaft coupling according to the present invention.
Fig. 19 is a perspective view thereof when assembled. In these figures, like signs are each assigned to the members having the same function as in Figs. 1 through 17.
On the outer peripheral surface of the end portion 2, the mount member 6 at the side of the driving shaft, which is made of metal, is mounted. This mounting is achieved by means of any proper measures such as splining or pressing in so that the driven side end surface of the mount member 6 is set so as to lie in substantially the same plane as the~driven side end portion 2 of the driving shaft. On the outer peripheral surface of the mount member 6, two slide members 210a, 210b at the side of the driving shaft are integrally formed at the 2~5~2 symmetrical positions relative to the rotational axis 2' of the driving shaft. These slide members 210a, 210b extend from the driven side end surface of the mount member 6 at the side of the driving shaft further toward the driven side each having a pair of outer slide surfaces running parallel to the Y-Z plane. On each of these outer slide surfaces, a replacement plate 211 is removably mounted, which plate is replaced by a new one after worn.
Similarly, on the outer peripheral surface of the end portion 4 of the driven shaft, the mount member 8 at the side of the driven shaft is mounted. This mounting is carried out bY any proper measures such as splining or pressing in so that the driving side end surface of the mount member 8 is set so as to lie in substantially the same plane as the driving side end surface of the end portion 4 of the driven shaft. On the outer peripheral surface of the mount member 8, two slide members 212a, 212b are integrally formed at the symmetrical positions relative to the rotational axis 4' of the driven shaft. These slide members 212a, 212b extend from the driving side end surface of the mount member 8 at the side of the driven shaft further toward the driving side each having a pair of outer slide surfaces running parallel to the X-Z
plane. Further, on each of these outer slide surfaces, a replacement plate 211 is removably mounted, which plate is replaced by a new one after worn.
The transmitting member 14 lies around the mount members 6, 8, slide members 210a, 210b at the side of the driving shaft and slide members 212a, 212b at the side of the driven shaft so as to cover them. The transmitting member 14 is of cylindrical form extending in the Z direction, within which 2 ~
two first slide channels 216a, 216b having a pair of first inner slide surfaces running parallel to the Y-Z plane and two second slide channels 218a, 218b having a pair of second inner slide surfaces running parallel to the X-Z plane are formed. The inner slide surfaces of the first slide channels 216a, 216b are slidable against the replacement plate 211 of the slide members 210a, 210b at the side of the driving shaft within the Y-Z plane. Similarly, the inner slide surfaces of the second slide channels 218a, 218b are slidable against the replacement plate 211 of the slide members 212a, 212b at the side of the driven shaft within the X-Z plane. Incidentally, the dimension of the transmitting member 14 and others are set so that they are slidable.
On the end surface at the driving side of the transmitting member 14, an abutting member 220 at the driving side is removably mounted by mean of a screw. Similarly, on the driven side end surface of the transmitting member 14, an abutting member 222 at the driven side is removably mounted by means of a screw. These abutting members restricts the position of the transmitting member as viewed in the axial direction by the abutment of the driving side end surface of the mount member 6 and the driven side end surface of the mount member 8. Of course, the distance between these abutting members 220, 222 is set greater than the expected maximum distance between the driving side end surface of the mount member 6 and the driven side end surface of the mount member 8.
As the foregoing replacement plate 211, a relatively soft metal such as bronze or the like may be used, or an oil containing alloy or plastic material may be used in order to achieve the self-lubricity. As the plastic material, a synthetic resin having a proper slidability relative to the metallic material of the transmitting member 14, for example, iron, proper strength and further a proper flexibility, such as, for example, polyacetal resin or polyamide resin may be used.
Thus, in this embodiment, since the first slide channels 216a, 216b slide in the Y and Z directions relative to the replacement plate 211 of the slide members 210a, 210b at the side of the driving shaft and is rotated with the X direction as its axis, the transmitting member 14 can be shifted relative to the mount member 6 at the side of the driving shaft and, since the second slide channels 218a, 218b slide in the X and Z directions relative to the replacement plate 211 of the slide members 212a, 212b at the side of the driven shaft and is rotated with the Y direction as their axis, it can be shifted relative to the mount member 8at the side of the driven shaft.
The forgoing shaft coupling according to this embodiment can be readily manufactured by assembling the members as shown in Fig. 18. The replacement of the plate 211 can be immediately carried out after one of the abutting members 220 and 222 is removed and the transmitting member 14 is shifted in the Z direction.
If, in this embodiment, as the replacement plate 211, one made of a plastic material is to be used, since this has a proper flexibility, the transmission of vibration between the driving shaft side and the driven shaft side can be sup-pressed and the torque transmission can be smoothly changed when the load is abruptly changed. Further, since the self-lubricity can result when it comes in slidable contact with the transmitting member 14, there is no need to use the lubri-2 ~ 3~ id cating oil, which simplifies the mainlenance.
Further, in this embodiment, since the slide members210a, 210b at the side of the driving shaft extend further toward the driven side relative to the driven side end surface of the mount member 6 at the side of the driving shaft and the slide members 212a, 212b at the side of the driven shaft extend further toward the driving side relative to the driving side end surface of the mount member 8 at the side of the driven shaft, the area over which they come in contact with the transmitting member 14 is great and the load per unit area is small leading to a small wear.
The function of the shaft coupling according to this embodiment is basicallY the same as that of the shaft coupling according to the second embodiment.
Fig. 20 is an exploded perspective view of a seventh embodiment of the shaft coupling according to the present invention, in which like signs are each assigned to the member having the same function as in Figs. 1 through 19.
This embodiment differs from the sixth embodiment only in that four slide members 210a-1, 210a-2, 210b-1, 210b-2 at the side of the driving shaft and four slide members 212a-1, 212a-2, 212b-1, 212b-2 at the side of the driven shaft are formed and, corresponding thereto, four first slide channels 216a-1, 216a-2, 216b-1, 216b-2 and four second slide channels 218a-1, 218a-2, 218b-1, 218b-2 are also formed on the transmit-ting member 14. This embodiment provides an operation and effect similar to those of the sixth embodiment, and further the area over which the slide members and the transmitting menlber 14 come in contact with each other is great. Therefore, a further great torque can be transmitted.
Fig. 21 is an exploded perSPective view of an eighth embodiment of the shaft coupling according to the present invention, in which like signs are each assigned to the members having the same function as that of Figs. 1 through 20.
This embodiment only differs from the sixth embodiment in that the slide members 210a, 210b at the side of the driving shaft and the slide members 212a, 212b at the side of the driven shaft are each mounted to the mount members 6 and 8 by means of a screw, and that no replacement plate is mounted to these slide members and the slide members 210a, 210b and the slide members 212a, 212b extend from the mount members 6 and 8 only in the radial direction. This embodiment provides an operation and effect similar to those of the sixth embodiment, and the slide member at the side of the driving shaft does not extend toward the driven side relative to the driven side end surface of the mount member at the side of the driving shaft, and the slide member at the side of the driven shaft does not extend toward the driving side relative of the driving side end surface of the mount member at the side of the driven shaft. Therefore, with these slide members and the transmitting member 14 disengaged, the end portion 2 of the driving shaft and the end portion 4 of the driven shaft can be independently rotated.
In the present invention, one of the slide member and the transmitting member may be made of metal, and the other may be made of plastic, or both of them may be made of metal or plastic.
As described above, the present invention allows the eccentricity, angular deviation and the axial movement between the driving shaft side and the driven shaft side to be excel-lently coped with while allowing t;he torque to be smoothly transmitted with a small loss. As a result, a shaft coupling which is simple in construction and easy in assembly and maintenance can be provided.
The shaft coupling according to the present invention can be manufactured ranging from ones of small diameter (for example, on the order of 20 mm) up to ones of large diameter (for example, on the order of 600 mm) so that it may be used in various torque transmitting mechanisms.
Claims (15)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Shaft coupling in which:
the end portion of a driving shaft and the end portion of a driven shaft are disposed in an opposed manner;
on the outer peripheral surface of said driving shaft end portion, a mount member at the side of the driving shaft is mounted, which is provided with a slide member at the side of the driving shaft, said slide member having a pair of slide surfaces running parallel to a plane of first direction which passes through the rotational axis of the driving shaft;
on the outer peripheral surface of said driven shaft end portion, a mount member at the side of the driven shaft is mounted, which is provided with a slide member at the side of the driven shaft, said slide member having a pair of slide surfaces running parallel to a plane of second direction which passes through the rotational axis of the driven shaft;
a torque transmitting member is disposed around said mount members at the side of the driving shaft and the driven shaft respectively, said torque transmitting member having a pair of first slide surfaces slidable relative to the pair of slide surfaces of the mount member at the side of the driving shaft within a plane running parallel to said plane of first direction and a pair of second slide surfaces slidable relative to the pair of slide surfaces of the mount member at the side of the driven shaft within a plane running parallel to said plane of second direction.
the end portion of a driving shaft and the end portion of a driven shaft are disposed in an opposed manner;
on the outer peripheral surface of said driving shaft end portion, a mount member at the side of the driving shaft is mounted, which is provided with a slide member at the side of the driving shaft, said slide member having a pair of slide surfaces running parallel to a plane of first direction which passes through the rotational axis of the driving shaft;
on the outer peripheral surface of said driven shaft end portion, a mount member at the side of the driven shaft is mounted, which is provided with a slide member at the side of the driven shaft, said slide member having a pair of slide surfaces running parallel to a plane of second direction which passes through the rotational axis of the driven shaft;
a torque transmitting member is disposed around said mount members at the side of the driving shaft and the driven shaft respectively, said torque transmitting member having a pair of first slide surfaces slidable relative to the pair of slide surfaces of the mount member at the side of the driving shaft within a plane running parallel to said plane of first direction and a pair of second slide surfaces slidable relative to the pair of slide surfaces of the mount member at the side of the driven shaft within a plane running parallel to said plane of second direction.
2. Shaft coupling as set forth in Claim 1 wherein said transmitting member is of cylindrical form.
3. Shaft coupling as set forth in Claim 1 wherein said transmitting member has a wall inwardly protruding between said first and second slide surfaces so as to intersect at a right angle with the axial direction and abuttable against said end portion of the driving shaft and/or said mount member at the side of the driving shaft and said end portion of the driven shaft and/or said mount member of the side of the driven shaft.
4. Shaft coupling as set forth in Claim 1 wherein at least the slide surfaces of the mount member at the side of the driving shaft and at least the slide surfaces of the mount member at the side of the driven shaft are each made of metal, and at least the first and second slide surfaces of said transmitting member are made of plastic.
5. Shaft coupling as set forth in Claim 1 wherein said mount member at the side of the driving shaft takes the form of a substantially rectangular parallelepiped also serving as the slide member at the side of the driving shaft, two opposed outer peripheral surfaces of which correspond to the slide surface, and said mount member at the side of the driven shaft takes the form of a substantially rectangular parallele-piped also serving as the slide member at the side of the driven shaft, two opposed outer peripheral surfaces of which correspond to the slide surface.
6. Shaft coupling as set forth in Claim 1 wherein said mount member at the side of the driving shaft is removably mounted relative to the end portion of the driving shaft, and said mount member at the side of the driven shaft is removably mounted relative to the end portion of the driven shaft.
7. Shaft coupling as set forth in Claim 6 wherein the mounting of said mount member at the side of the driving shaft relative to the outer peripheral surface of the end portion of the driving shaft and the mounting of said mount member at the side of the driven shaft relative to the outer peripheral surface of the end portion of the driven shaft are each carried out by fastening the mount member relative to the cylindrical outer peripheral surface of the shaft end portion.
8. Shaft coupling as set forth in Claim 1 wherein, on the outer peripheral surface of the end portion of the driving shaft and the end portion of the driven shaft, a stop at the side of the driving shaft and a stop at the side of the driven shaft are removably mounted in order to restrict the position of the transmitting member as viewed in the axial direction.
9. Shaft coupling as set forth in Claim 1 wherein said slide member at the side of the driving shaft is removably mounted relative to said mount member at the side of the driving shaft, and said slide member at the side of the driven shaft is removably mounted relative to said mount member at the side of the driven shaft.
10. Shaft coupling as set forth in Claim 1 wherein a replacement plate which is removable relative to the slide surface is mounted on said slide members at the side of the driving shaft and the driven shaft respectively.
11. Shaft coupling as set forth in Claim 10 wherein said transmitting member is made of metal, and said replacement plate is made of plastic.
12. Shaft coupling as set forth in Claim 1 wherein said slide member at the side of the driving shaft extends further toward the driven side relative to the driven side end surface of said mount member at the side of the driving shaft, and said slide member at the side of the driven shaft extends further toward the driving side relative to the driving side end surface of said mount member at the side of the driven shaft.
13. Shaft coupling as set forth in Claim 1 wherein said slide member at the side of the driving shaft only extends from said mount member at the side of the driving shaft in the radial direction, and said slide member at the side of the driven shaft only extends from said mount member at the side of the driven shaft in the radial direction.
14. Shaft coupling as set forth in Claim 1 wherein, on the driving side end surface of said transmitting member, a member for restricting the position of the transmitting member as viewed in the axial direction and for abutting the mount member at the side of the driving shaft are removably mounted, and, on the driven side end surface of said transmitting member, a member for restricting the position of the transmit-ting member as viewed in the axial direction and for abutting the mount member at the side of the driven shaft are removably mounted.
15. Shaft coupling as set forth in Claim 1 wherein said first direction and said second direction intersect at a right angle with each other.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3319627A JPH05133423A (en) | 1991-11-08 | 1991-11-08 | Shaft joint |
| JP3-319627 | 1991-11-08 | ||
| JP3-347671 | 1991-12-04 | ||
| JP34767191A JPH05157120A (en) | 1991-12-04 | 1991-12-04 | Shaft coupling |
| JP35118591 | 1991-12-13 | ||
| JP3-351185 | 1991-12-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2085112A1 true CA2085112A1 (en) | 1993-05-09 |
Family
ID=27339736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002085112A Abandoned CA2085112A1 (en) | 1991-11-08 | 1992-04-08 | Shaft coupling |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR930703547A (en) |
| AU (1) | AU1582592A (en) |
| CA (1) | CA2085112A1 (en) |
| WO (1) | WO1993009358A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1640628A2 (en) | 2004-09-24 | 2006-03-29 | Sperre Mek. Verksted | Piston engine |
| US8057199B2 (en) | 2006-01-26 | 2011-11-15 | Jiangmen Idear Hanyu Electrical | Centrifugal drainage pump with shock absorbing coupling arrangment |
| CN102728959A (en) * | 2011-04-04 | 2012-10-17 | 通快机床两合公司 | Holding and drive device for a tube support element |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2708061A1 (en) * | 1993-07-23 | 1995-01-27 | Cepem | System for coupling two components of parallel axes together, with take-up of play |
| DE10108348C1 (en) * | 2001-02-21 | 2002-08-29 | Inkoma Maschb Gmbh | shaft coupling |
| FR2896838B1 (en) * | 2006-01-27 | 2009-11-06 | Plastic Omnium Cie | PIECE OF PLASTIC MATERIAL FORMING OLDHAM NUTS |
| DE102006048678B4 (en) | 2006-10-14 | 2011-11-17 | Pierburg Gmbh | coupling device |
| WO2010065037A1 (en) * | 2008-12-05 | 2010-06-10 | Sikorsky Aircraft Corporation | Eccentric fitting assembly |
| US8667663B2 (en) | 2008-12-05 | 2014-03-11 | Sikorsky Aircraft Corporation | Eccentric fitting assembly |
| DE102016222895A1 (en) * | 2016-11-21 | 2018-04-05 | Schaeffler Technologies AG & Co. KG | coupling member |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4814980Y1 (en) * | 1970-09-24 | 1973-04-25 | ||
| JPS6286418U (en) * | 1985-11-19 | 1987-06-02 | ||
| JPS6334321A (en) * | 1987-04-08 | 1988-02-15 | Masanori Mochizuki | Oldham's coupling |
-
1992
- 1992-04-08 AU AU15825/92A patent/AU1582592A/en not_active Abandoned
- 1992-04-08 WO PCT/JP1992/000436 patent/WO1993009358A1/en not_active Application Discontinuation
- 1992-04-08 CA CA002085112A patent/CA2085112A1/en not_active Abandoned
-
1993
- 1993-07-07 KR KR1019930702023A patent/KR930703547A/en not_active IP Right Cessation
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1640628A2 (en) | 2004-09-24 | 2006-03-29 | Sperre Mek. Verksted | Piston engine |
| US8202066B2 (en) | 2004-09-24 | 2012-06-19 | Sperre Mek. Verksted As | Piston engine |
| US8057199B2 (en) | 2006-01-26 | 2011-11-15 | Jiangmen Idear Hanyu Electrical | Centrifugal drainage pump with shock absorbing coupling arrangment |
| CN102728959A (en) * | 2011-04-04 | 2012-10-17 | 通快机床两合公司 | Holding and drive device for a tube support element |
| CN102728959B (en) * | 2011-04-04 | 2015-02-11 | 通快机床两合公司 | Holding and drive device for a tube support element |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1993009358A1 (en) | 1993-05-13 |
| AU1582592A (en) | 1993-06-07 |
| KR930703547A (en) | 1993-11-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |