JP3355899B2 - Shaft coupling - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft coupling which is interposed at a connecting portion of a rotating shaft to transmit a rotational driving force and reduce vibration transmission, and more particularly to an improved structure which is simple in structure and easy to manufacture. The present invention relates to a shaft coupling.

[0002]

2. Description of the Related Art Generally, a shaft coupling (coupling) is interposed at a connecting portion of a rotating shaft such as a steering shaft or a propeller shaft of an automobile to transmit a rotational driving force while suppressing vibration transmission.

[0003] As this shaft coupling, for example, Japanese Utility Model Application
As described in -27532, etc., each of a plurality of first tubular fittings attached to the first rotating shaft and second tubular fittings attached to the second rotating shaft is placed on the same circumference. In addition to alternately arranging a predetermined distance from each other in the circumferential direction, a cord member is wound around the first tubular metal member and the second tubular metal member that are adjacent to each other in the circumferential direction, and each of the cord members is rubber-elastic. A corded shaft joint having a structure in which a first tube member and a second tube member are connected by being wrapped by a body is known.In such a shaft joint, variations in cord tension and a rubber elastic body are known. Is likely to be non-uniform, and it has been difficult to stably obtain desired properties.

In Japanese Patent Application Laid-Open Nos. 4-95614 and 6-94044, rubber bushes are provided at a plurality of positions on a rotation center axis with respect to a synthetic resin base. By connecting the first rotating shaft and the second rotating shaft via the bush and the resin base,
A shaft coupling having a structure that stabilizes characteristics by eliminating the need for winding a cord member has been disclosed. However, in such a shaft coupling, it is difficult to secure sufficient rigidity, and in addition to the problem of ambient temperature There was a problem such as insufficient strength of the base due to the thermal effect of the steel.

Further, a first cylindrical fitting attached to the first rotating shaft and a second cylindrical fitting attached to the second rotating shaft are alternately arranged on the same circumference in the circumferential direction at a predetermined distance from each other. A first stopper plate fixedly attached to the first rotating shaft to limit the amount of circumferential displacement of the second cylindrical member, while the cylindrical member is elastically connected by a rubber elastic disk; By arranging a second stopper plate fixed to the shaft to limit the amount of circumferential displacement of the first tubular metal fitting on both surfaces of the rubber elastic disk, the first rotation shaft and the second In addition to securing the coupling spring rigidity of the rotating shaft, a shaft joint having a structure that limits the relative displacement amount in the circumferential direction between the first rotating shaft and the second rotating shaft is also conceivable, but in such a shaft joint, It is inevitable that the number of parts increases and the number of manufacturing steps increases. , There has been a problem of poor production and cost of.

[0006]

The present invention has been made in view of the above circumstances, and has as its solution the problem of having a simple structure with a small number of parts and easy to manufacture. Another object of the present invention is to provide a shaft coupling capable of stably obtaining desired performance.

Another object of the present invention is to provide a shaft coupling capable of securing sufficient rigidity and effectively preventing deterioration of performance and the like due to heat.

The present invention also provides a shaft coupling capable of effectively and stably limiting the relative displacement of the first rotary shaft and the second rotary shaft in the rotation direction with a simple structure. Aim.

[0009]

In order to solve such a problem, a feature of the present invention is that the two rotation shafts are interposed between a first rotation shaft and a second rotation shaft. A pair of shaft couplings for connecting the shafts in an anti-vibration manner and transmitting a rotating force between the two rotating shafts, wherein a same number of bush mounting holes and stopper openings are provided at positions corresponding to each other around the rotation center axis. Rubber plate on the outer peripheral surface of the shaft member attached to the first or second rotating shaft.
The rubber bushing comprising a sexual body tighten dressing vulcanization, before Symbol allowed fixed to the bush mounting hole, with the shaft member mounted so as to be substantially parallel to the rotational center axis, rotation of such a pair of metal plates center Overlapping and fixing or fixing facing each other on the shaft, the shaft member of each rubber bush attached to both metal plates is inserted into the stopper opening provided on the other metal plate, The inner peripheral surface of the stopper opening is opposed to the outer peripheral surface of the shaft member of the rubber bush at a predetermined distance in the circumferential direction around the rotation center axis, and the stopper opening and the opposing surface of the shaft member are separated from each other. In that a buffer member is provided.

[0010] Such a shaft coupling having a structure according to the present invention is manufactured by mutually combining a pair of metal plates of the same structure each having a rubber bush mounted thereon, so that the number of parts and the type of parts are reduced. It is possible to reduce the number of operations, and it is not necessary to perform troublesome operations such as winding a cord member and assembling a separate stopper plate. It is desirable that the pair of metal plates combined be integrated by welding or the like. However, the two metal plates are temporarily fixed as necessary, and the two metal plates are bolted to attach the metal plate to a rotating shaft. It is also possible to fix the plates to one another.

In addition, the connection characteristics and the vibration-proof characteristics of the shaft member are set according to the characteristics of the rubber bush provided on the metal plate and the size of the stopper opening, respectively. Thus, the instability of the characteristics can be prevented, and the desired characteristics can be stably obtained.

Further, since the joint base is formed of a metal plate, sufficient strength and heat resistance can be easily ensured.

Further, by the shaft member of the rubber bush abutting on the stopper opening of the metal plate, the amount of deformation of the rubber bush, that is, the relative rotation amount of the first rotation shaft and the second rotation shaft is limited. Therefore, the relative rotation amounts of the two rotation shafts can be effectively and stably limited.

[0014] The attachment of the shaft coupling having the structure according to the present invention to the first and second rotating shafts may be performed, for example, as follows. Is also attached to the first rotating shaft,
This can be advantageously achieved by providing an attachment for the second rotating shaft for the superposed metal plates. Here, the structure of the mounting portion in the metal plate is not particularly limited, but, for example, as described in claim 3, in a pair of metal plates,
Each of the plurality of through holes provided at positions corresponding to each other around the rotation center axis is advantageously constituted by a plurality of mounting holes formed by overlapping the pair of plates to communicate with each other. If the mounting portion of the metal plate is formed by such mounting holes, the metal plate can be easily mounted on the second mounting shaft by bolts or the like inserted into each mounting hole, and furthermore, each metal plate has The mounting portion can be easily formed by a simple configuration in which a through hole is provided at a fixed position.

More specifically, for example, as described in claim 4, in each metal plate, a bush mounting hole and a stopper opening are formed one by one so as to oppose each other in a direction perpendicular to the axis. At the same time, the bush mounting hole and the stopper opening are opposed to each other in a direction perpendicular to the axis substantially perpendicular to the direction in which the stopper opening is provided, and the two through-holes forming the mounting holes are provided. A shaft coupling with two rubber bushes mounted on the first rotating shaft, which has a stopper mechanism for limiting the relative rotation of the second rotating shaft and the second rotating shaft, can be advantageously formed.

The mounting of the shaft coupling having the structure according to the present invention to the first and second rotating shafts is performed, for example, in each metal plate as described in claim 5.
A plurality of bush mounting holes and a plurality of stopper openings are provided, and four or more rubber bushes are provided around the rotation center axis of the metal plates stacked on each other, and the first rotation shaft and the second rotation shaft are provided. The shafts are respectively configured to be attached to shaft members of two or more different rubber bushes. Particularly preferably, as described in claim 6, in a metal plate superposed on each other, a rubber bush in which the shaft member is mounted on the first rotation shaft, and the shaft member is mounted on the second rotation shaft. The rubber bush and the rubber bush are alternately positioned in the circumferential direction around the rotation center axis of the metal plate.

Furthermore, in the present invention, the specific structure of the rubber bush and the structure for assembling the rubber bush into the bush mounting hole are not particularly limited. A rubber bush was formed by providing a cylindrical body in the mounting hole, inserting the shaft member into the cylindrical body, and directly connecting the cylindrical body and the shaft member with a rubber elastic body. A structure is advantageously employed. The cylindrical body may be formed integrally with the metal plate, or may be formed by fixing a separately formed cylindrical body to the metal plate by welding or the like. Also, by setting a cylindrical portion of a metal plate and a shaft member in a molding die of a rubber bush, vulcanizing and molding a rubber elastic body therebetween, and vulcanizing and bonding to the cylindrical portion and the shaft member. A bush is advantageously formed.

Further, in the case of adopting the structure described in claim 7, the rubber body is pre-compressed by reducing the diameter of the cylindrical portion constituting the rubber bush, thereby eliminating the tensile stress. It is also possible to achieve reduction and improvement of durability.

In the present invention, a rubber bush in which a shaft member and an intermediate sleeve disposed outside the shaft member at a predetermined distance are connected by a rubber elastic body disposed therebetween. It is, of course, possible to assemble the rubber bush into the bush mounting hole by separately manufacturing and fixing the intermediate sleeve to the bush mounting hole of the metal plate by press-fitting or caulking.

In the present invention, the specific structure of the stopper opening provided on the metal plate is not particularly limited, and is at least larger than the shaft member and smaller in the circumferential opening dimension than the bush mounting hole. In addition, it can be formed in various shapes such as a through-hole shape and a notch shape at the outer periphery. Further, it is desirable that the stopper opening is provided so as to protrude on the side opposite to the overlapping surface of the metal plate, as described in claim 8, whereby the rubber bush is provided from the first rotating shaft. The deviation between the input position to the metal plate and the input position to the metal plate from the second rotation axis is set small in the direction of the rotation center axis to suppress the generation of stress inside the shaft coupling, thereby improving strength and durability. And the like can be easily improved.

Further, in the present invention, as set forth in claim 9, a cylindrical portion forming a bush mounting hole and a projecting portion projecting to a side opposite to the overlapping surface to form a stopper opening. Is preferably press-formed integrally with the metal plate, so that
It is possible to obtain a shaft coupling that can achieve the same effect as that achieved by the configuration according to the ninth aspect, with more excellent manufacturability and cost.

Furthermore, in the present invention, claim 10
As described in the above, it is desirable to form a concave portion and a convex portion which are engaged with each other at corresponding positions on the facing surfaces in the pair of metal plates. If such a configuration is adopted, relative positioning can be easily performed with high accuracy and stably when the metal plates are overlapped. Further, if these concave portions and convex portions are formed so as to be fittable, it is also possible to temporarily fix both metal plates by using these concave portions and convex portions, so that the productivity can be further improved.

In the present invention, the bush mounting hole and the stopper opening only need to be formed at positions corresponding to each other when the metal plates are opposed to each other. The numbers of the mounting holes and the stopper openings are not particularly limited.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, in order to clarify the present invention more specifically, embodiments of the present invention will be described with reference to the drawings.

First, FIGS. 1 to 4 show an automobile steering coupling 10 as one embodiment of the present invention. This steering coupling 10 has two rubber bushes 14 mounted on a base 12 having a disk shape as a whole, and a rotating shaft on the steering wheel side as a first rotating shaft and a second rotating shaft. And one of the rotating shafts on the steering gear side is attached to each rubber bush 14, and the other is attached to the base 12, so that the two rotating shafts are connected in a vibration-proof manner and are driven to rotate. It is designed to transmit power.

More specifically, the base 12 is constituted by a pair of metal plates 16 having the same shape, which are overlapped to face each other. This metal plate 16 has a circular planar shape as shown in FIG. 5 as a single unit front view before the superposition, and the central axis O is the rotation central axis of the steering coupling 10. Has been. In addition, metal plate 1
6 has a U-shaped planar shape that opens to the outer peripheral edge at one location around the central axis: O, and protrudes to one side in the axial direction (the surface 18 side opposite to the overlapping surface). Of the first plateau-like projection 20 and a cylindrical body extending toward the other side in the axial direction (overlapping surface 22 side) at the center of the first plateau-like protrusion 20. The part 24 is formed integrally. A bush mounting hole 26 is formed by the inner hole of the cylindrical body 24.

In the present embodiment, the first plate-like projection 20 is projected so that the axial center of the cylindrical body 24 is positioned substantially on the same plane as the overlapping surface 22 of the metal plate 16. The height and the axial length of the cylindrical body 24 are set.

The metal plate 16 has a U-shaped planar shape which is open to the outer peripheral edge at a portion located on the opposite side to the first plateau-like projection 20 in the radial direction with respect to the center axis O. Second plateau-like projection 2 projecting to the surface 18 side
8 are formed. This second plateau-shaped protrusion 28
Has a plane shape substantially similar to that of the first plateau-shaped projection 20, and has a U-shaped opening at an outer peripheral edge side at a central portion thereof.
A notch-shaped stopper opening 30 is formed.

The height of the second plateau-like protrusion 28 from the overlapping surface 22 is Ha, but the height of the protrusion from the overlapping surface 22 at the tip of the cylindrical body 24 at the tip of the protrusion is Ha:
It is set larger than Hb by a predetermined amount. The circumferential opening width: Ba of the stopper opening 30 is defined by the cylindrical body portion 24.
The inner diameter of the bush mounting hole 26 is set smaller by a predetermined amount than Bb.

Further, an inner cylindrical fitting 32 as a shaft member is inserted through the cylindrical portion 24 of the metal plate 16, and has a diameter relative to the cylindrical portion 24 on the same axis as the cylindrical portion 24. It is arranged in the direction protruding from the cylindrical body portion 24 on both sides in the axial direction by a predetermined amount at a predetermined distance inward in the direction. Further, a cylindrical rubber elastic body 34 is interposed between the cylindrical body portion 24 and the inner cylindrical metal fitting 32, and the cylindrical body portion 24 is provided.
The rubber bush 14 is formed by connecting the inner cylinder 32 with the rubber elastic body 34.

In this embodiment, the rubber elastic body 34 is vulcanized between the tubular body 24 and the inner tubular fitting 32 while the inner tubular fitting 32 is inserted through the tubular body 24. Thereby, the inner cylindrical fitting 32 and the cylindrical portion 24 are respectively vulcanized and bonded to the inner and outer peripheral surfaces of the rubber elastic body 34. Further, after vulcanization molding of the rubber elastic body 34, if necessary, a diameter reduction process is performed on the cylindrical body portion 24, and pre-compression is applied to the rubber elastic body 34.

The inner cylindrical fitting 32 is provided with a buffer rubber layer 36 of a predetermined thickness as a buffer member on the outer peripheral surface of a portion protruding from the cylindrical body portion 24 toward the overlapping surface 22 side. In this embodiment, the cushion rubber layer 36 is formed integrally with the rubber elastic body 34.

A pair of metal plates 16 and 16 having such a structure and having the rubber bush 14 mounted thereon are provided.
Are faced so as to face each other on the side of the superimposed surfaces 22 and 22 and are superposed axially in a state of being displaced by 180 degrees in the circumferential direction. The steering coupling 10 is configured by being fixed.

That is, the base 12 is constituted by the superposition of such a pair of metal plates 16, 16, and the portion of the first plate-like projection 20 on one metal plate 16 and the other metal plate 16. The portion of the second plateau-like projection 28 is positioned so as to be overlapped in the axial direction, and the first plateau-like projection 2
0 is formed in the second plateau-like projection 28.
And is substantially covered by the second plateau-like projection 28. The inner metal fitting 32 of the rubber bush 14 attached to the cylindrical body 24 of each metal plate 16 is inserted through the stopper opening 30 of the other metal plate 16, and In contrast, the stopper opening 3
The inner peripheral surface of the stopper opening 30 is opposed to the inner cylindrical surface of the inner cylinder via a cushion rubber layer 36 at a predetermined distance in the circumferential direction around the rotation center axis O. By contacting the metal fitting 32, the deformation amount of the rubber elastic body 34, that is, the rotation center axis of the inner cylindrical metal fitting 32 with respect to the base 12:
The relative displacement amount around O is limited.

Each of the metal plates 16 has a pair of through holes 4 formed in a portion opposed in a radial direction orthogonal to a direction in which the first plate-like protrusion 20 and the second plate-like protrusion 28 face each other.
0 and 40 are provided. Then, the pair of metal plates 16, 16 are overlapped with each other in the specific relative positional relationship as described above, so that the through holes 40, 40 of both metal plates 16, 16 communicate with each other, and the mounting holes 42 are provided.
Is configured.

Further, in this embodiment, two concave portions 44 and two convex portions 46 are located around the rotation center axis O on the superposed surface 22 side of each metal plate 16.
It is formed by press molding or the like. These two concave portions 44 and convex portions 46 are formed by displacing the metal plates 16, 16 by 180 degrees in the circumferential direction with respect to each other.
When overlapped in the axial direction at 22, the concave portion 44
Are positioned so as to engage with each other.
The engagement between the metal plates 16 and 16
Are positioned relative to each other so that a stopper clearance or the like is secured.

The size of the concave portion 44 and the convex portion 46 can be set so that the convex portion 46 fits into the concave portion 44 and is locked, if necessary. By using a suitable concave-convex fitting, the metal plates 16, 16 can be temporarily fixed to each other at a stage until the metal plates 16, 16 are fixed by welding or the like and assembled and fixed between the rotating shafts. Becomes

In the steering coupling 10 having the above-described structure, as shown in FIGS. 1 and 4, the mounting bolt 48 is inserted into the inner cylindrical fitting 32 of each rubber bush 14. The inner tube fitting 32
A mounting bolt fixed to one of the rotating shafts (first rotating shafts) 50 of the steering wheel-side rotating shaft and the steering gear-side rotating shaft, and inserted into each of the mounting holes 42 of the metal plate 16. The metal plate 16 is fixed to the other rotating shaft (second rotating shaft) 54 of the steering wheel-side rotating shaft and the steering gear-side rotating shaft 54 by the 52 so that the first rotation of the metal plate 16 is achieved. It is interposed between the shaft 50 and the second rotating shaft 54.

As a result, the rotational force about the rotation center axis O is transmitted between the first rotation shaft 50 and the second rotation shaft 54 via the rubber bushes 14, 14. Vibration transmission between the first rotating shaft 50 and the second rotating shaft 54 is reduced based on the vibration isolating performance of the bushes 14, 14. When an excessive rotational force is input between the first rotating shaft 50 and the second rotating shaft 54, the inner cylindrical fitting 32 is connected to the metal plate via the buffer rubber layer 36 in each rubber bush 14. 16 stopper openings 30
, The elastic deformation of the rubber elastic body 34,
That is, the relative displacement amount of the rotation center axis: O relative to the rotation center axis of the inner cylinder fitting 32 with respect to the base 12 is limited, so that the relative rotation amount of the first rotation shaft 50 and the second rotation shaft 54 is limited. Become.

Here, the steering coupling 10 as described above constitutes a first plateau-shaped projection 20 on which the rubber bush 14 is mounted, and a stopper mechanism for limiting the relative displacement between the rotating shafts 50 and 54. Are manufactured by assembling a pair of metal plates 16, 16 of the same structure integrally provided with a second plateau-shaped protrusion 28 provided with a stopper opening 30 which is provided, facing each other. A stopper plate is not required, the number of parts is small, there is no need to prepare a large number of rubber molding dies and press dies, etc., the manufacturing equipment is simple and the production cost is excellent, and winding of cord members and separate stopper plates This eliminates the need for troublesome work such as assembling, thus achieving excellent manufacturability.

Also, the structure is simple and easy to manufacture, and there are no unstable elements such as uneven winding of the cord member, so that the desired characteristics can be easily and stably obtained. is there.

Further, the base 12 is made of a metal plate 16,
Because of the structure of the base 16, great strength, heat resistance, and durability are secured in the base 12 itself, and thereby, the rotation load resistance, stopper load resistance, durability, and the like of the steering coupling 10 can be reduced. You can secure enough.

Although one embodiment of the present invention has been described above, the present invention is not construed as being limited to only the specific example.

For example, in the above embodiment, the bush mounting hole 26 and the stopper opening 3
0 were provided one by one, but if the bush mounting holes and the stopper openings were provided by the same number so that they would be in the same position when two metal plates were superposed face to face. Well, their number is not limited at all. Further, the through holes 40 provided in each metal plate 16 only need to be provided at the same position when two metal plates are superposed face to face, and the number and positions of the through holes 40 are also limited. Not something.

Specifically, for example, as shown in FIG. 6, a pair of bush mounting holes 26 and a stopper opening It is also possible to form the four through-holes 40 so as to be located at the intermediate portion in the circumferential direction between the bush mounting hole 26 and the stopper opening 30 while forming the through-holes 30. FIG. 6 shows a single metal plate 16.
FIG. 6 is a plan view corresponding to FIG. 5 of the first embodiment, showing a state in which the rubber bush 14 is mounted in the bush mounting hole 26. To facilitate understanding, FIG. Members and parts having the same structure as in the embodiment are denoted by the same reference numerals as those in the embodiment.

That is, in a steering coupling manufactured by overlapping and fixing a pair of metal plates 16 having such a structure, four rubber bushes are provided around the rotation center axis of the base 12. 14 will be arranged and positioned, with respect to the inner cylindrical fitting 32 of each rubber bush 14,
One of the rotating shafts on the steering wheel side and the steering gear side is attached, and the other of the steering wheel side and the steering gear side is attached to the attachment hole 42 of the base 12 formed by the through hole 40, respectively. By attaching the rotating shaft of
It is mounted between these two rotating shafts.

In the specific example shown in FIG. 6, the pair of bush mounting holes 26 and the stopper openings 30 are formed in the metal plate 16 so as to face each other in two radial directions orthogonal to each other. However, in addition, for example, each of the two bush mounting holes 26 and the stopper opening 30
It is also possible to use a pair of metal sleeves in which the bush mounting hole 26 and the stopper opening 30 are opposed to each other in two radial directions orthogonal to each other, by positioning the metal sleeves in the circumferential direction. As in the case of using the pair of metal sleeves provided, a steering coupling in which four rubber bushes 14 are arranged and positioned around the rotation center axis of the base 12 can be obtained.

As described above, in a steering coupling in which four or more rubber bushes 14 are arranged around the rotation center axis of the base 12, such rubber bushes 1
4 are attached to one of the rotating shafts on the steering wheel side and the steering gear side, while the remaining (2 or more) inner cylinder fittings of the rubber bush 14 are attached. By attaching 32 to the other rotating shaft on the steering wheel side and the steering gear side, the steering coupling can be mounted between the two rotating shafts. In the case where such a mounting structure is employed, the input of a rotational force directly from the rotating shaft to the base 12 is avoided, and the damper mechanism can be configured using the base 12.

Further, in the above embodiment, the cylindrical portion 24 forming the bush mounting hole 26 and the stopper opening 30 are provided on the first plate-shaped protrusion 20 and the second plate-shaped protrusion 28. However, as shown in FIG. 7, without forming such a plateau-shaped protrusion, the cylindrical body 24 and the stopper opening 30 forming the bush mounting hole 26 are formed on the flat metal plate 16. , Can also be formed directly. In FIG. 7, in order to facilitate the understanding, in the figure, the same reference numerals are given to members and parts having the same structure as the first embodiment, respectively. Keep it.

In the above embodiment, the bush mounting hole 2
The rubber elastic body 34 that constitutes the rubber bush 14 is directly vulcanized and bonded to the cylindrical body part 24 that forms the rubber body 6. In addition, a rubber in which a metal sleeve is adhered to the outer peripheral surface of the rubber elastic body 34 is used. The bush 14 may be separately formed, and the metal sleeve may be press-fitted and fixed to the bush mounting hole 26 of the cylindrical body portion 24 for mounting.

Further, as a cushioning member interposed between the shaft member of the rubber bush and the stopper opening, it is possible to form a cushioning rubber layer 36 on the stopper opening side.
Alternatively, a synthetic resin may be used as the cushioning material, and a resin collar may be attached to the outer peripheral surface of the shaft member, for example, to form a cushioning member.

In addition, in the above embodiment, the steering coupling is shown as one embodiment of the present invention. However, the present invention is similarly applied to various shaft couplings such as a coupling for a propeller shaft. Is applicable to
Of course.

In addition, although not enumerated one by one, the present invention
Based on the knowledge of those skilled in the art, the present invention can be implemented in a form in which various changes, modifications, improvements, and the like are made.
It goes without saying that all such embodiments are included within the scope of the present invention, without departing from the spirit of the present invention.

[0054]

As is apparent from the above description, a shaft coupling having a structure according to the present invention can be manufactured by combining metal plates having the same structure with rubber bushes mounted thereon. Therefore, it is easy to manufacture, the number of assembled parts is small, and extremely excellent manufacturability and cost performance are exhibited.

Further, in such a shaft coupling, a stopper mechanism for limiting the relative rotation amount of the first rotary shaft and the second rotary shaft by a combination of metal plates having the same structure with rubber bushes is provided. It can be advantageously configured without the need for components.

[Brief description of the drawings]

FIG. 1 is an explanatory longitudinal sectional view showing a steering coupling as one embodiment of the present invention, and is a sectional view taken along a line I-I in FIG.
It is a figure corresponding to I section.

FIG. 2 is a right side view in FIG.

FIG. 3 is a sectional view taken along the line III-III in FIG.

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is a front view showing a metal plate on which a rubber bush is mounted, which constitutes the steering coupling shown in FIG. 1;

FIG. 6 is a front view corresponding to FIG. 5, showing a metal plate constituting a steering coupling as another specific example of the present invention.

FIG. 7 is a sectional view of a main part showing a steering coupling as still another specific example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Steering coupling 12 Base 14 Rubber bush 16 Metal plate 22 Superposition surface 26 Bush mounting hole 30 Stopper opening 32 Inner cylinder metal fitting 34 Rubber elastic body 42 Mounting hole 50 First rotation axis 54 Second rotation axis

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-4-95614 (JP, A) JP-A-7-167156 (JP, A) JP-A-6-94044 (JP, A) JP-A-2- 165873 (JP, A) JP-A-8-93782 (JP, A) JP-A-59-52262 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16D 3/70 F16D 3 / 68 F16D 3/12 F16D 3/50

Claims (10)

(57) [Claims] 1. A shaft coupling that is interposed between a first rotating shaft and a second rotating shaft to connect the two rotating shafts in a vibration-proof manner and transmit a rotating force between the two rotating shafts. a is, bush mounting hole and the stopper opening, in a pair of metal plates provided by the same number of mutually corresponding positions in the rotational center axis, of the first or second shaft member attached to the rotation shaft of the Vulcanized rubber elastic body adhered to outer peripheral surface
A rubber bushing which is Te, it before Symbol each bush mounting hole
Is allowed fixed, together with the shaft member mounted so as to be substantially parallel to the rotational center axis, secured to overlay facing one another such pair of metal plates on the rotary central axis
Fixed, the shaft member of the mounted thereto both metal plates each rubber bush and brought through positioned in the stopper opening portion provided in the other of the metal plates, the rubber bushing the inner peripheral surface of the stopper opening And a buffer member is disposed between the stopper opening and the facing surface of the shaft member at a predetermined distance in the circumferential direction around the rotation center axis with respect to the outer peripheral surface of the shaft member. Shaft coupling. 2. A shaft member of each of the rubber bushes is attached to the first rotating shaft, while an attaching portion to the second rotating shaft is provided for the superposed metal plate. The shaft coupling according to claim 1, wherein the shaft coupling is provided. 3. The pair of metal plates are formed by mutually connecting a plurality of through holes provided at positions corresponding to each other around a rotation center axis by overlapping the pair of plates. The shaft coupling according to claim 2, wherein a plurality of mounting holes form a mounting portion to the second rotating shaft. 4. In each of the metal plates, the bush mounting hole and the stopper opening are each formed so as to oppose each other in a direction perpendicular to the axis, and the bush mounting hole and the stopper opening oppose each other. The shaft coupling according to claim 3, wherein two of the through holes that form the mounting holes are provided at positions facing each other in a direction perpendicular to the axis substantially perpendicular to the axis. 5. In each of the metal plates, a plurality of the bush mounting holes and the plurality of stopper openings are respectively provided, and in the metal plates overlapped with each other, four or more rubber bushes are provided around a rotation center axis thereof. 2. The shaft coupling according to claim 1, wherein the first rotation shaft and the second rotation shaft are attached to two or more different shaft members of the rubber bush, respectively. 3. 6. In the metal plates superimposed on each other, the rubber bush in which the shaft member is attached to the first rotating shaft and the rubber bush in which the shaft member is attached to the second rotating shaft. 6. The shaft coupling according to claim 5, wherein the shaft coupling is alternately positioned in a circumferential direction around a rotation center axis of the metal plate. 7. A cylindrical body is provided in the bush mounting hole, and the shaft member is inserted and disposed in the cylindrical body, and the cylindrical body and the shaft member are directly connected by a rubber elastic body. The shaft coupling according to any one of claims 1 to 6, wherein the rubber bush is configured. 8. The shaft coupling according to claim 1, wherein the stopper opening is provided at a position protruding from a side opposite to a superposed surface of the metal plate. 9. In each of said metal plates, a cylindrical portion forming said bush mounting hole and a projecting portion projecting to a side opposite to an overlapping surface to form said stopper opening are integrally press-formed. The shaft coupling according to any one of claims 1 to 8, wherein: 10. The shaft coupling according to claim 1, wherein the pair of metal plates has a concave portion and a convex portion which are engaged with each other at corresponding positions on the facing surfaces.