JP2605916Y2 - Coupling - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention relates to couplings.
In particular, it relates to a coupling having a vibration damping function.

[0002]

2. Description of the Related Art In general, vibrations such as torsional vibrations are generated in a drive system of an automobile, and there is a strong demand for a device capable of effectively damping those vibrations.

As such a device, for example, a gear damper disclosed in Japanese Utility Model Application Laid-Open No. 2-87162 is already known, and the gear damper projects on the outer peripheral surface at predetermined intervals in the circumferential direction. A ring gear in which concave portions and convex portions are alternately provided at predetermined intervals in the circumferential direction on the inner peripheral surface of a hub provided with alternating portions and concave portions is meshed in a loose fit state. Are integrally connected by a rubber ring so that the hub and the ring gear can rotate within a predetermined range.

When the hub is connected to the drive-side shaft, the ring gear is meshed with the driven-side gear and the like, and the drive-side shaft is rotated, the rotating torque is driven from the hub via the rubber ring and the ring gear. Vibration such as torsional vibration generated at the drive side shaft at this time is attenuated by the viscoelasticity of the rubber ring interposed between the hub and the gear ring, and the gear ring Will also be attenuated by acting as an inertial mass of torsional vibration generated in the hub via the elastic body, and the adjacent convex parts will come into contact with each other, causing a gap between the hub and the ring gear. The displacement of the interposed rubber ring is limited to prevent the rubber ring from being damaged.

However, in the gear damper constructed as described above, since both the hub and the ring gear are formed of rigid bodies, it takes a lot of trouble to process the concave and convex portions, and the manufacturing cost is increased. I will. Further, if the specifications of the mounting portion of the hub on the drive side shaft, the gear portion of the ring gear, and the like are different, the design specifications must be changed accordingly, and the versatility is poor. Furthermore, since both are formed of a rigid body, there is a problem that a loud collision sound is generated when the protruding portions come into contact with each other, which becomes noise and is transmitted to the vehicle body side.

This invention solves the above-mentioned problems of the prior art, and is easy to work, can greatly reduce the manufacturing cost, is excellent in general versatility, and is excellent in elasticity. It is an object of the present invention to provide a coupling having a vibration damping function capable of greatly reducing a collision sound when limiting displacement.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to an annular ring in which a hub is fitted on an inner peripheral surface.
Keep a predetermined distance between the inner sleeve and the outer circumference of the inner sleeve.
Gear ring fitted on the outer peripheral surface
An annular outer sleeve is provided between the two sleeves.
Between the two sleeves by vulcanization bonding over the entire circumference.
And a recess at one side in a ring with a predetermined depth.
An annular elastic body such as a rubber-like elastic material,
And the inner circumference fits into the inner circumference of the recess
Are connected together by bonding or vulcanization bonding, and
A resin ring in which concave portions and convex portions are provided alternately over the entire circumference
When it is provided inside the recess,
In addition, the outer peripheral side is fitted to the outer peripheral side of
And the inner sleeve is
The convex portion and the concave portion which mesh with the concave portion and the convex portion in a loosely fitted state extend over the entire circumference.
And an annular outer stopper made of resin alternately provided
This is a means that employs

[0008]

According to the present invention, the inner sleeve is connected to the drive shaft via a hub by employing the above-mentioned means.
And the outer sleeve to the driven gear via a gear ring.
When the shaft on the drive side is rotated by meshing, the rotational torque is increased.
To the inner sleeve, elastic body such as rubber-like elastic material,
Transmission to the driven gear, etc., through the leave and gear ring
You. Then, vibration such as torsional vibration is generated on the drive side shaft.
Then, the vibration is generated by the rubber-like
Attenuated by the viscoelasticity of an elastic body such as a conductive material ,
The outer sleeve side is also attenuated by acting as an inertial mass of vibration such as torsional vibration generated on the inner sleeve side via an elastic body such as a rubber-like elastic material . Sa
In addition, the adjacent protrusions of the inner stopper and outer stopper
By contacting each other, rubber-like elastic material
The displacement of the elastic body in the rotation direction is limited.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention shown in the drawings will be described below. 1 and 2 show an embodiment of the coupling according to the present invention. FIG. 1 is a plan view showing the entirety, and FIG. 2 is a sectional view taken along line AA of FIG.

That is, this coupling is a rubber-like coupling that integrally connects the inner sleeve 1 connected to the driving side, the outer sleeve 2 connected to the driven side, and the two sleeves 1 and 2 by vulcanization bonding or the like. An elastic body 3 such as an elastic material and a limiting member 4 provided between the sleeves 1 and 2 are provided.

The restricting member 4 has concave portions 5a and convex portions 5b of a predetermined size alternately provided in the circumferential direction on the outer peripheral surface, and a predetermined portion on the inner peripheral surface corresponding to the convex portion 5b. A concave portion 5d of a size, an annular resin inner stopper 5 in which a convex portion 5c of a predetermined size is provided at a portion corresponding to the concave portion 5a, and the inner stopper 5 on an inner peripheral surface in a circumferential direction. 5 a concave portion 5a and a convex portion 5 on the outer peripheral surface
The concave portions 6a having the same pitch as the convex portions 5b and having a size slightly larger than the convex portions 5b and the convex portions 6b having a size slightly smaller than the concave portions 5a are provided alternately, and the convex portions 6b on the outer peripheral surface are provided. A concave portion 6 having a predetermined size in a portion corresponding to
c is a protrusion 6 having a predetermined size in a portion corresponding to the recess 6a.
d, each of which is provided with an annular outer stopper 6 made of resin. Each of the concave portions 5a and the convex portions 5b on the outer peripheral surface of the inner stopper 5 is provided with a corresponding one of the convex portions 6b on the inner peripheral surface of the outer stopper 6. The recess 6a meshes in a loosely fitted state.

The elastic body 3 is integrally connected between the inner sleeve 1 and the outer sleeve 2 over the entire circumference by vulcanization bonding or the like, and has a predetermined side over the entire circumference on one side. A concave portion 7 having a depth of notch is formed, and the concave portion 7 is fitted over the entire surface of the inner sleeve 1 side surface with the convex portion 5c and concave portion 5d on the inner peripheral surface side of the inner stopper 5. Recess 7 to get
a, convex portions 7b are formed alternately, and a concave portion 7c which can be fitted to the convex portion 6d, concave portion 6c on the outer peripheral surface side of the outer stopper 6 over the entire surface of the concave portion 7 on the outer sleeve 2 side. -The convex parts 7d are formed alternately.

The restricting member 4 is fitted into the recess 7 configured as described above, and the concave portion 5 d and the convex portion 5 c on the inner peripheral side of the inner stopper 5 are connected to the convex on the inner sleeve 1 side of the concave portion 7. The inner peripheral surface of the inner stopper 5 is formed by matching the concave portion 6c and the convex portion 6d on the outer peripheral side of the outer stopper 6 with the convex portion 7d and the concave portion 7c on the outer sleeve 2 side of the concave portion 7, respectively. Is on the outer peripheral surface of the inner sleeve 1 via the elastic body 3, and the outer peripheral surface of the outer stopper 6 is on the elastic body 3
And the stoppers 5 and 6 are relatively rotatable within a range in which the adjacent convex portions 5b and 6b in the engaged state come into contact with each other. It is what becomes.

Next, the operation of the above-described device will be described. First, the hub 8 is fitted on the inner peripheral surface of the inner sleeve 1, and the gear ring 9 is fitted on the outer peripheral surface of the outer sleeve 2, respectively.
The hub 8 is connected to a drive-side shaft (not shown),
Is meshed with a driven gear or the like (not shown), and when the driving shaft is rotated, the rotational torque is transmitted from the hub 8 to the driven gear or the like via the inner sleeve 1, the elastic body 3, the outer sleeve 2 and the gear ring 9. introduce.

In such a process, when a vibration such as a torsional vibration is generated on the drive side shaft, the vibration is transmitted from the drive side shaft to the hub 8 and the inner sleeve 1, and
An attempt is made to transmit to the outer sleeve 2 and the gear ring 9 from the inner sleeve 1 via the elastic body 3, but torsional vibration transmitted from the outer sleeve 2 and the gear ring 9 to the hub 8 and the inner sleeve 1 via the elastic body 3 is considered. Since it acts as an inertial mass, the vibration to be transmitted to the outer sleeve 2 is attenuated, and is also attenuated by the viscoelasticity of the elastic body 3.

In the above case, since the outer sleeve 2 and the gear ring 9 act as an inertial mass, the portion of the elastic body 3 directly connecting the inner sleeve 1 and the outer sleeve 2 tends to be largely displaced. Is an inner stopper 5 of the limiting member 4 fitted in the recess 7 of the elastic body 3.
The displacement of the elastic body 3 is limited by limiting the rotation range between the outer stopper 6 and the outer stopper 6.

In the coupling according to this embodiment constructed as described above, since the inner stopper 5 and the outer stopper 6 of the limiting member 4 for limiting the displacement of the elastic body 3 are both made of resin, they are integrated by a mold. Molding becomes possible, processing becomes easier than conventional ones, and both stoppers 5, 6 which are in a meshing state during rotation are formed.
Even when the adjacent convex portions 5b and 6b abut against each other, no loud impact noise is generated.

Since the gear ring 9 is fitted on the outer peripheral side of the outer sleeve 2 and the hub 8 is fitted on the inner peripheral side of the inner sleeve 1, the specification of the gear portion of the gear ring 9 and the specification of the mounting portion of the hub 8 are adopted. Are different, they can be used as long as the inner diameter of the gear ring 9 and the outer diameter of the hub 8 are the same, and the versatility is remarkably improved.

In the above description, the recess 7 is formed on one side of the elastic body 3 and the restricting member 4 composed of the inner stopper 5 and the outer stopper 6 is fitted therein. The elastic body 3 is vulcanized by vulcanizing the elastic body 3 between the inner stopper 5 and the inner sleeve 1 and between the outer stopper 6 and the outer sleeve 2 with the restricting member 4 positioned between the outer sleeve 6 and the outer sleeve 6. They may be connected integrally.

[0020]

[Effect of the invention] This invention is constructed as described above.
Control the displacement of the elastic body such as rubber-like elastic material in the rotation direction.
Both the inner and outer stoppers
Since it is made of fat, it can be integrally formed by a mold. did
As a result, processing becomes easier and manufacturing costs are greatly reduced.
Can be made. Also, adjacent protrusions of both stoppers
Even if they come into contact with each other, both stoppers are made of resin
Because of this, no loud collision noise is generated. I
Therefore, even if it is used for the drive system of automobiles,
Comfortable driving without collision sound being transmitted to the vehicle body
Character will be obtained. In addition, the inner circumference of the inner sleeve
With the hub on the outer sleeve
Since the gear is fitted, the specifications of the gear part of the gear ring and
Even if the specifications of the hub mounting part are different,
If the outer diameter of the hub is the same,
To provide highly versatile ones
You can do it.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a coupling according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Inner sleeve 2 ... Outer sleeve 3 ... Elastic body 4 ... Restriction member 5 ... Inner stopper 5a, 5d, 6a, 6c, 7a, 7c ... Depression 5b, 5c, 6b, 6d, 7b, 7d … Protrusion 6… Outside stopper 7… Recess 8… Hub 9… Gearing

──────────────────────────────────────────────────続 き Continued from the front page (56) References JP-A-4-316743 (JP, A) JP-A-64-20570 (JP, U) JP-A-1-98964 (JP, U) JP-A 61-98 109939 (JP, U) Hira 4-87051 (JP, U) Hira 4-78353 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F16F 15/10-15 / 139 F16H 55/14 F16D 3/50 F16D 3/76

Claims (1)

(57) [Scope of request for utility model registration] An annular inner sleeve into which a hub is fitted on an inner peripheral surface.
Leave a predetermined distance between the sleeve and the outer circumference of the inner sleeve.
Provided and gear ring is fitted to the outer peripheral surface
An annular outer sleeve and both sleeves
Leaves are connected together by vulcanization bonding over the entire circumference
At the same time, a recessed part is provided in a ring at a predetermined depth on one side
An annular elastic body such as a rubber-like elastic material
And the inner peripheral side is fitted or
Integrally connected by vulcanization bonding, and a concave portion on the outer peripheral side,
Of a resin ring in which convex parts are provided alternately over the entire circumference
And a side stopper, provided in the recessed portion,
The outer peripheral side is integrated with the outer peripheral side of the recessed part or integrated by vulcanization bonding
And, on the inner peripheral side, a concave portion of the inner sleeve,
The convex portion and the concave portion that mesh with the convex portion in a loose fit state
With a resin annular outer stopper provided mutually
A coupling characterized in that: