Rotary shafts – gudgeons – housings – and flexible couplings for ro – Torque transmitted via flexible element – Plural flexible links connected to circumferentially spaced...
Patent
1984-07-12
1986-05-13
Levy, Stuart S.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Torque transmitted via flexible element
Plural flexible links connected to circumferentially spaced...
464 71, 464138, 464904, F16D 362
Patent
active
045883882
DESCRIPTION:
BRIEF SUMMARY
The invention relates to a shaft coupling. More particularly, it relates to a shaft coupling which permits the parts to be coupled to be at an offset angle with respect to one another, comprising a first coupling half, a second coupling half, an intermediary member between the first and second coupling halves, a first guide means with universally pivotable guides which connects the first coupling half with the intermediary member, and a second guide means with universally pivotable guides which connects the second coupling half with the intermediary member.
Such a shaft coupling is known from U.S. Pat. No. 4,040,270 (see FIGS. 12 and 13, for example). In this known shaft coupling, three intermediary members are provided in the form of consecutively superimposed rotatable rings. Each of these rings is coupled by means of a single guide with the first coupling half and is coupled with the second coupling half by means of another guide, which is diametrically opposed to the first guide. The pairs of guides which are associated with the three intermediary members are offset by an angle of about 120.degree. in their rest position, i.e., when the two shafts to be coupled are aligned with one another. The guides are universally pivotably mounted by means of ball joints on the coupling halves or on the intermediary members, respectively. In another embodiment of the coupling, in accordance with the coupling of U.S. Pat. No. 4,040,270 (FIG. 14), the universal pivot movement is carried out by means of rubber elements.
The coupling in accordance with U.S. Pat. No. 4,040,270 permits, in a kinematically sufficient manner, a radial displacement of one shaft relative to the other with an angle-perfect transmission of the rotational movement. The universally pivotable movements of the guide permits the axes of the shafts to be coupled to be at an offset angle with respect to one another. In the known coupling, the torque transmission is carried out by means of a guide of the one coupling half, via the rings and the other guide which is disposed on the other side of the rings, to the other coupling half. Thereby, it is essential that three rings are rotatably mounted in a superimposed manner for the kinematic and torque transmission. This requires a very cumbersome bearing in the practical application of the device.
Another known shaft coupling with an intermediary member which is coupled with a guide means on the drive end and the power output end is disclosed in French Pat. No. 1,457,431. In this known shaft coupling, each guide means consists of three guides which are at a 120.degree. angled displacement position with respect to each other. The coupling half on the drive end is a pot-like element, and the three guides are pivotably mounted on the edge of this pot-like element. The intermediary member is a ring which is mounted within the pot-like element and is connected therewith by the guides. The guides generally are universally pivotably mounted by means of rubber cups or bodies. The ring which forms the intermediary member is also coupled with the disk-like power output coupling half which is disposed within the ring by three 120.degree. angled displaced positioned guides which also generally extend in a circumferential direction. However, this known coupling does not permit a radial displacement. The transmission of a rotational movement at an offset or deflected angle between the drive end and the power output rotational axes is only approximately homokinetic.
It is therefore an object of the invention to provide a constructively simple shaft coupling which permits the rotary axes of the shafts to be coupled at an angle with one another in a kinematically sufficient manner during a homokinematic transmission of the rotational movement.
This object is obtained in that:
(a) the first control guide is provided by a pair of diametrically-opposed guide rods;
(b) the second control guide is provided by a pair of diametrically-opposed guide rods;
(c) one of the guide rods of one pair is disposed in axial alignment with
REFERENCES:
patent: 268807 (1882-12-01), Landis
patent: 2181888 (1939-12-01), Gustin
patent: 2551837 (1951-05-01), Holloway
patent: 4033144 (1977-07-01), Allen
patent: 4040270 (1977-08-01), Chivari
patent: 4084411 (1978-04-01), Mayfield
patent: 4187699 (1980-02-01), Weible
patent: 4314460 (1982-02-01), Mayfield
Levy Stuart S.
Stodola Daniel P.
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