JPH0684045U - Coupling - Google Patents

Abstract

(57) [Abstract] [Purpose] To reduce the manufacturing cost by facilitating the processing of individual parts and reduce the level of collision noise during rotation. [Composition] Between the inner sleeve 1 and the outer sleeve 2,
The inner peripheral surface of the resin-made outer stopper 6 in which the concave portions and the convex portions are alternately formed is formed on the outer peripheral surface of the resin-made inner stopper 5 in which the concave portion and the convex portion are alternately formed on the inner and outer peripheral surface. Engage in a loosely fitted state, and in this state, integrally connect the inner sleeve 1 and the inner stopper 5, the outer sleeve 2 and the outer stopper 6, and the inner sleeve 1 and the outer sleeve 2 with the elastic body 3. To do. At the time of rotation, the outer sleeve 2 side acts as an inertial mass of vibration such as torsional vibration generated on the inner sleeve 1 side through the elastic body 3, whereby the vibration is damped, and both stoppers in a meshed state at the time of rotation. The displacement of the elastic body is limited by the contact between the convex portions 5 and 6.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a coupling, and more particularly to a coupling having a vibration damping function.

[0002]

[Prior art and its problems]

 In general, vibrations such as torsional vibrations are generated in a drive system of an automobile, and therefore there is a strong demand for a device that can effectively damp those vibrations.

As such a device, for example, a gear damper disclosed in Japanese Utility Model Laid-Open No. 2-87162 has already been known, and this gear damper is projected on the outer peripheral surface at predetermined intervals in the circumferential direction. A ring gear, in which recesses and protrusions are alternately provided at predetermined intervals in the circumferential direction on the inner peripheral surface, is meshed with a hub in which parts and recesses are provided alternately in a loose fit state, and Is integrally connected with a rubber ring so that the hub and the ring gear can be rotated within a predetermined range.

When the hub is connected to the drive-side shaft and the ring gear is engaged with the driven-side gear and the drive-side shaft is rotated, rotational torque is driven from the hub via the rubber ring and ring gear. Vibration such as torsional vibration that is transmitted to the gear on the drive side and is generated on the drive-side shaft at this time is damped by the viscoelasticity of the rubber ring interposed between the hub and the gear ring, and at the same time, the gear ring Is also damped by acting as the inertial mass of the torsional vibration generated in the hub via the elastic body, and the contact between adjacent protrusions causes the gap between the hub and ring gear to The displacement of the rubber ring intervening in the rubber ring is limited to prevent damage to the rubber ring.

However, in the gear damper configured as described above, since the hub and the ring gear are both formed of a rigid body, it takes a lot of time and labor to process the concave portion and the convex portion and the manufacturing cost becomes high. Will end up. In addition, if the specifications of the mounting part of the hub on the drive side shaft and the gear part of the ring gear are different, the design specifications must be changed accordingly, resulting in poor versatility. Further, since both of them are formed of a rigid body, there is a problem that a loud collision noise is generated when the convex portions come into contact with each other, and the collision noise is transmitted to the vehicle body side.

The present invention solves the above-mentioned problems of the conventional ones, is easy to process and can significantly reduce the manufacturing cost, is excellent in versatility, and is elastic. It is an object of the present invention to provide a coupling having a vibration damping function that can significantly reduce the collision noise when limiting the displacement of the.

[0007]

[Means for solving problems]

 In order to solve the above problems, the present invention provides a restricting member, which is composed of an inner stopper made of resin and an outer stopper, which is relatively rotatable within a predetermined range, between the inner sleeve and the outer sleeve. The inner sleeve and the outer sleeve are integrally connected with each other by an elastic body, and a part of this elastic body further integrates between the inner stopper and the inner sleeve and between the outer stopper and the outer sleeve. It adopts the method of connecting.

[0008]

[Action]

 This device adopts the above-mentioned means, and when the inner sleeve is connected to the drive side shaft and the like, the outer sleeve is connected to the driven side gear and the like, and the drive side shaft is rotated, the rotational torque is Is transmitted from the inner sleeve to the driven side via the elastic body and the outer sleeve, and the vibration such as torsional vibration generated on the drive side shaft at this time is viscoelastic of the elastic body interposed between the sleeves. It is also damped by the outer sleeve side acting as an inertial mass of the torsional vibration generated on the inner sleeve side via the elastic body.

[0009]

【Example】

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

That is, this coupling is composed of an inner sleeve 1 connected to the driving side, an outer sleeve 2 connected to the driven side, and a rubber-like member integrally connecting the sleeves 1 and 2 by vulcanization adhesion 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 limiting member 4 has concave portions 5a and convex portions 5b of a predetermined size alternately provided on the outer peripheral surface in the circumferential direction, and a predetermined portion on the inner peripheral surface corresponding to the convex portion 5b. A concave portion 5d having a size, an annular inner stopper 5 made of a resin in which a convex portion 5c having a predetermined size is provided at a portion corresponding to the concave portion 5a, and the inner peripheral surface facing in the circumferential direction. A concave portion 6a having a size slightly larger than that of the convex portion 5b and a convex portion 6b having a size slightly smaller than the concave portion 5a are formed at the same pitch as the concave portion 5a and the convex portion 5b on the outer peripheral surface of the inner stopper 5. The concave portions 6c having a predetermined size are provided at the portions corresponding to the convex portions 6b on the outer peripheral surface, and the convex portions 6d having a predetermined size are provided at the portions corresponding to the concave portions 6a. Such as a ring-shaped resin outer stopper 6 Each of the concave portions 5a and the convex portions 5b on the outer peripheral surface of the inner stopper 5 is meshed with the convex portions 6b and the concave portions 6a on the inner peripheral surface of the outer stopper 6 in a loosely fitted state. .

The elastic body 3 integrally connects the inner sleeve 1 and the outer sleeve 2 over the entire circumference by vulcanization adhesion or the like, and on one side over the entire circumference. A concave portion 7 having a predetermined depth is bored, and the surface of the concave portion 7 on the inner sleeve 1 side is fitted over the entire circumference with the convex portion 5c and the concave portion 5d on the inner peripheral surface side of the inner stopper 5. The concave portions 7a and the convex portions 7b that can be formed are alternately formed, and the convex portion 6d and the concave portion 6c on the outer peripheral surface side of the outer stopper 6 are fitted over the entire circumference on the surface of the concave portion 7 on the outer sleeve 2 side. The obtained concave portions 7c and convex portions 7d are alternately formed.

Then, the limiting member 4 is fitted in the recessed portion 7 configured as described above, and the recessed portions 5 d and the protruding portions 5 c on the inner peripheral side of the inner stopper 5 are protruded from the recessed portion 7 on the inner sleeve 1 side. By aligning 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 of the concave portion 7 on the outer sleeve 2 side, respectively, the inner peripheral surface of the inner stopper 5 is formed. Is connected to 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 connected to the inner peripheral surface of the outer sleeve 2 via the elastic body 3, and both stoppers 5, 6 is relatively rotatable within a range in which the adjacent convex portions 5b, 6b in the meshed state are in contact with each other.

Next, the operation of the above will be described. First, the hub 8 is fitted to the inner peripheral surface of the inner sleeve 1 and the gear ring 9 is fitted to the outer peripheral surface of the outer sleeve 2, and the hub 8 is connected to a drive-side shaft (not shown). When the drive side shaft is rotated by meshing with the gear etc., the rotary torque is transmitted from the hub 8 to the driven gear etc. through the inner sleeve 1, the elastic body 3, the outer sleeve 2 and the gear ring 9.

When vibration such as torsional vibration is generated in the drive-side shaft in such a process, the vibration is transmitted from the drive-side shaft to the hub 8 and the inner sleeve 1, and is also elastic from the inner sleeve 1. The inertial mass of the torsional vibration is transmitted to the outer sleeve 2 and the gear ring 9 via the body 3, but the outer sleeve 2 and the gear ring 9 transmit to the hub 8 and the inner sleeve 1 via the elastic body 3. Vibration acting to be transmitted to the outer sleeve 2 side is damped, and also viscoelasticity of the elastic body 3 damps it.

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

In the coupling according to this embodiment configured as described above, since both the inner stopper 5 and the outer stopper 6 of the restricting member 4 for restricting the displacement of the elastic body 3 are made of resin, they are integrated by the mold. Molding is possible, processing is much easier than the conventional one, and even if the adjacent protrusions 5b, 6b of both stoppers 5, 6 that are in a meshed state during rotation come into contact with each other, No loud impact noise is generated.

Further, 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 specifications of the gear part of the gear ring 9 and the specifications of the mounting part of the hub 8 are specified. However, if the inner diameter of the gear ring 9 and the outer diameter of the hub 8 are the same, they can be used in common and the versatility is significantly improved.

In the above description, the recessed portion 7 is formed on one side of the elastic body 3 and the limiting member 4 including the inner stopper 5 and the outer stopper 6 is fitted in the inner portion thereof. With the limiting member 4 positioned between the sleeve 5 and the outer sleeve 6, the elastic body 3 is vulcanized between the inner stopper 5 and the inner sleeve 1 and between the outer stopper 6 and the outer sleeve 2. Both may be integrally connected.

[0020]

[Effect of device]

 As described above, according to the present invention, between the inner sleeve and the outer sleeve, the restricting member composed of the resin inner stopper and the outer stopper, which is relatively rotatable within a predetermined range, is positioned and in this state. Since the inner sleeve and the outer sleeve, the inner stopper and the inner sleeve, and the outer stopper and the outer sleeve are integrally connected by an elastic body, the inner sleeve and the outer sleeve of the restricting member are integrally formed by a mold. It becomes possible to process, the processing becomes easy, and the manufacturing cost can be significantly reduced. In addition, since the displacement of the elastic body is also limited due to the limited rotation of the inner sleeve and the outer sleeve, even in such a case, since both sleeves are made of resin, a large collision noise is generated. There is almost no risk of such problems occurring. Therefore, when it is used in a drive system of an automobile or the like, it has an excellent effect that it is possible to reliably prevent the sound due to a collision from being transmitted to the vehicle body.

[Brief description of 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 the one shown in FIG.

[Explanation of symbols]

 1 ... Inner sleeve 2 ... Outer sleeve 3 ... Elastic body 4 ... Limiting member 5 ... Inner stopper 5a, 5d, 6a, 6c, 7a, 7c ... Recessed portion 5b, 5c, 6b, 6d, 7b, 7d ...... Convex part 6 …… Outside stopper 7 …… Dimple part 8 …… Hub 9 …… Gear ring

Claims (1)

[Scope of utility model registration request] 1. An inner stopper (5) and an outer stopper (6) made of resin, which are relatively rotatable within a predetermined range, between an inner sleeve (1) and an outer sleeve (2). An elastic body (3) is provided between the inner sleeve (1) and the outer sleeve (2) while the limiting member (4) is positioned.
And the inner stopper (5) and the inner sleeve (1) and the outer stopper (6) and the outer sleeve (2) are integrally connected by a part of the elastic body (3). Coupling characterized by having done.