JPH09144769A - Torque clutch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To respond to vibration caused by torque change and prevent a driving system from being damaged by making a driving part side and a driven part side on the same axis communicated with each other through a buffering element, a vibration damping element, a clutch element. SOLUTION: A buffering element 3j is constituted by fitting buffering bodies 3m, 3n of a semi-cylindrical shape at both the ends of a coil spring 3k. Rotational torque from a disc-shaped protrusion part 3f side is transmitted to a fixed flange part 3b and a removable flange part 3c, and the impactive rotational torque and torque change are rotatingly-transmitted while they are being buffered by the coil spring 3k. At the time of buffering of impact, the semi- cylindrical buffering bodies 3m, 3n revolve themselves and is buffered against both the end surfaces of respective long holes 3g and respective long grooves 3h, 3i. A vibration damping element 4 integrally-rotates through a belleville spring working in such direction as reaction force in the axial direction disengages both the parts over the fixed flange part 3b and a clutch element 5, and the clutch element 5 is constituted so as to disengage a friction board which faces a driven part 6, thus damping vibration caused by torque change.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque clutch having a shock absorbing element, a vibration damping element and a clutch element.

[0002]

2. Description of the Related Art For example, in a power transmission system that causes torque fluctuations such as an internal combustion engine, the torque clutch in the power transmission system is also loaded with the torque fluctuations. In this regard,
The conventional torque clutch is designed in consideration of the above load, but it becomes a large one with a higher safety factor,
It is a factor that cannot be miniaturized. Further, the vibration generated due to the torque fluctuation increases at a certain high speed rotation and the drive system is damaged.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a torque clutch which can cope with vibrations caused by torque fluctuation and which does not damage the drive system.

[0004]

In order to achieve the above-mentioned object, the present invention provides a torque clutch in which the drive part side and the driven part side of a coaxial line are in an interlocking relationship via a buffer element, a vibration damping element and a clutch element. The shock-absorbing element has a disk-shaped protrusion at the end of the drive shaft on the drive unit side disposed in the gap between the integrally rotatable fixed flange portion and the removable flange portion of the shock absorber holding portion on the drive unit side. Along with the plurality of elongated holes provided in the circumferential direction of the projecting portion and the elongated groove of the fixed flange portion and the elongated groove of the removable flange portion facing the elongated holes, a shocking rotational torque and torque fluctuation are provided. Shock absorbers that can absorb the
The reaction force in the axial direction extends between the fixed flange portion and the friction plate holding portion of the clutch element between the disc spring outer peripheral end face receiving seat of the fixed flange portion and the disc spring inner peripheral end face receiving seat of the friction plate holding portion. It is made to rotate integrally via a disc spring arranged so as to work in a separating direction, and the clutch element is such that the friction plate holding portion having a friction plate facing the driven portion can be brought into contact with and separated from the driven portion. Is characterized by. In the present invention,
The disc spring is a stacked disc spring in which a plurality of laminated disc springs are formed, and the outer peripheral end surface and the inner peripheral surface portion thereof are formed in a convex curved surface in radial cross section, and the disc spring outer peripheral end surface receiving seat and the friction plate holding portion of the fixing flange are formed. The disc spring inner peripheral end face receiving seats are respectively formed in a concave curved surface shape corresponding to the inner and outer peripheral end faces. The disc spring according to the present invention may be a single disc spring or a superposed disc spring. In the latter disc spring, vibration damping due to interplate friction can be obtained in addition to the Hysteris effect. Further, the meshing force of the disc spring with respect to the disc spring outer peripheral end face receiving seat of the fixed flange portion and the disc spring inner peripheral end face receiving seat of the friction plate holding portion increases due to the centrifugal action due to the increase in rotation.

[0005]

1 to 3 illustrate an embodiment of the present invention, in which a coaxial clutch driving portion 2 side and a driven portion 6 side of a torque clutch 1 have a cushioning element 3, The vibration damping element 4 and the clutch element 5 are interlocked with each other.
The cushioning element 3 includes a fixed flange portion 3b and a detachable flange portion 3c that are integrally rotatable in the cushioning body holding portion 3a on the drive portion 2 side.
A disk-shaped projecting portion 3f at the end of the drive shaft 3e is disposed in a space 3d between the projecting portion 3f and a plurality of circumferentially elongated holes 3g in the projecting portion 3f.
The buffer element 3j is mounted over the long groove 3h of the fixed flange portion 3b and the long groove 3i of the removable flange portion 3c facing the respective long holes. This buffer element 3j is a coil spring
Semi-cylindrical shock absorbers 3m and 3n are attached to both ends of 3k, and rotational torque from the protruding portion 3f side is fixed to the fixed flange portion.
3b and removable flange part 3c side,
The shocking rotation torque and torque fluctuation are coil spring
Rotation can be transmitted while buffering at 3k. Further, the drive shaft 3e allows the protrusion 3f of the drive shaft 3e to freely move with respect to the space 3d of the buffer body holding portion 3a, and copes with deviation of the shaft center on the drive unit 2 side or the driven unit 6 side (eccentricity, deviation angle). It is adjustable. Further, both end faces of each long hole 3g and each long groove 3h, 3i are formed in a concave curved surface shape corresponding to the semi-cylindrical shock absorbers 3m, 3n, and shock shock due to rotational torque and torque fluctuation is buffered. At some times, the semi-cylindrical shock absorbers 3m and 3n can rotate around and buffer the end faces of the long holes 3g and the long grooves 3h and 3i.

In the vibration damping element 4, the reaction force in the axial direction extends between the disc spring outer peripheral end surface receiving seat 4a of the fixed flange portion 3b and the disc spring inner peripheral end surface receiving seat 4b of the friction plate holding portion 5a. Arrange the disc spring 4c so that it works in the direction to separate the
3b and the friction plate holding portion 5a of the clutch element 5 are connected so as to rotate integrally. The disc spring 4c is a laminated disc spring having a plurality of laminated layers (see Japanese Utility Model Publication No. 51-41981). The outer peripheral end surface 4d and the inner peripheral surface portion 4e are each formed in a convex curved surface in a radial cross section, and the fixing flange portion 3b is formed. Of the disc spring outer peripheral end face receiving seat 4a and the friction plate holding portion 5a of the disc spring inner peripheral end face receiving seat 4b of the disc spring 4c.
Are formed into concave curved surfaces corresponding to the inner and outer peripheral end surfaces 4d and 4e. And, the disc spring 4c is surface-treated (deflick treatment or ferrosoferric oxide coating (Fe3O4)),
It has improved wear resistance, fatigue strength and corrosion resistance.

In the clutch element 5, a friction plate holding portion 5a having a friction plate 5b facing the driven plate 6a on the side of the driven portion 6 can be brought into contact with and separated from the driven plate 6a. This friction plate holding portion 5a,
The fixed flange portion 3b is integrally rotatable with the bush 3s axially slidably provided on the support shaft 3p on the rotation axis, and similarly to the driven plate 6a rotatably supported by the bush 3s. The rotational torque on the drive unit 2 side can be transmitted, and the rotational torque can be cut off by sliding the bush and the bush in the direction in which the reaction force of the disc spring 4c increases (to the right in the drawing). Further, a nut 3t is screwed to the screw portion 3r of the support shaft 3p, and the friction plate holding portion 5a and the friction plate 5
b, the driven plate 6a is prevented from coming off the support shaft 3p, and by tightening this nut 3t, the connection relationship between the fixed flange portion 3b via the disc spring 4c and the friction plate holding portion 5a is maintained. There is.

FIG. 4 illustrates another embodiment of the present invention, in which both end surfaces of the buffer bodies 3m and 3n in the buffer element 3j are formed in a convex curved surface, and the drive portion 2 side or the driven portion is formed. If there is a deviation of the shaft center on the 6 side, both end faces of the shock absorbers 3m and 3n and the long groove 3
It is possible to prevent damage and breakage caused by fretting wear due to friction with h and 3i. It is especially effective at high speed rotation.

Further, the cushioning element in the above-mentioned embodiment may have a mode in which two coil springs are arranged in parallel between the cushioning bodies.

[0010]

【The invention's effect】

A. According to the first aspect, the coaxial drive portion side and the driven portion side are configured to be interlocked with each other via the cushioning element, the vibration damping element, and the clutch element. Therefore, shocks due to torque fluctuations are cushioned through the cushioning element. In addition, the vibration due to the torque fluctuation can be damped through the disc spring. Therefore, it is useful for protecting the power transmission system of an internal combustion engine that has torque fluctuations, and also the generator etc. connected to the same system, can stably transmit and continue rotational torque at high speed, and can be used as a clutch for high-speed rotational transmission. It is useful. B. According to claim 2, the disc spring is a stacked disc spring having a plurality of laminated layers, and the outer peripheral end face and the inner peripheral face part thereof are formed in a convex curved surface in radial cross section, and the disc spring outer peripheral end face receiving seat of the fixing flange and Since the disc spring inner peripheral end face receiving seats of the friction plate holding portion are respectively formed in a concave curved surface shape corresponding to the inner and outer peripheral end faces, damage in meshing can be suppressed to a minimum.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view illustrating an embodiment of a torque clutch of the present invention.

FIG. 2 is a longitudinal sectional view of FIG. 1 (2)-(2).

FIG. 3 is a partially enlarged vertical sectional view showing an enlarged part.

FIG. 4 is a partial vertical cross-sectional view illustrating another form of the torque clutch of the present invention.

[Explanation of symbols]

1 Torque clutch 2 Drive part 3 Buffer element 3a Buffer body holding part 3b Fixed flange part 3c Detachable flange part 3d Gap 3e Drive shaft 3f Drive shaft protrusion 3g Projected slot 3h Fixed flange slot 3i Detachable flange Long groove 3j Buffer element 3k Buffer element coil spring 3m, 3n Buffer element buffer 3p Support shaft 3r Support shaft screw 3s Bushing 3t Nut 4 Vibration damping element 4a Disc spring outer peripheral end face seat 4b Disc spring inner peripheral end face Seat 4c Disc spring 4d Disc spring outer peripheral end face 4e Disc spring inner peripheral surface 5 Clutch element 5a Friction plate holder 5b Friction plate 6 Driven part 6a Driven plate

Claims (2)

[Claims] 1. A torque clutch in which a drive portion side and a driven portion side, which are coaxial with each other, are interlocked with each other via a buffer element, a vibration damping element, and a clutch element, and the buffer element is a buffer body holding portion on the drive portion side. In the gap between the integrally rotatable fixed flange portion and the removable flange portion in the above, a disk-shaped projecting portion of the drive shaft end on the drive portion side is disposed, and a plurality of circumferentially elongated holes in the projecting portion are provided. A damping element capable of absorbing shocking rotational torque and torque fluctuation is mounted between the long groove of the fixed flange portion and the long groove of the removable flange portion facing the respective long holes, and vibration damping is provided. The elements are
The reaction force in the axial direction extends between the fixed flange portion and the friction plate holding portion of the clutch element between the disc spring outer peripheral end face receiving seat of the fixed flange portion and the disc spring inner peripheral end face receiving seat of the friction plate holding portion. It is made to rotate integrally via a disc spring arranged so as to work in a separating direction, and the clutch element is such that the friction plate holding portion having a friction plate facing the driven portion can be brought into contact with and separated from the driven portion. Torque clutch characterized by. 2. The disc spring is a stacked disc spring in which a plurality of laminated disc springs are formed, and the outer peripheral end face and the inner peripheral face portion thereof are formed to have a convex curved surface in a radial cross section, and the disc spring outer peripheral end face receiving seat of a fixed flange. The torque clutch according to claim 1, wherein the disc spring inner peripheral end face receiving seat of the friction plate holding portion is formed in a concave curved surface shape corresponding to the inner and outer peripheral end faces, respectively.