Rotary shafts – gudgeons – housings – and flexible couplings for ro – Housing
Patent
1993-05-12
1994-11-15
Crowder, Clifford D.
Rotary shafts, gudgeons, housings, and flexible couplings for ro
Housing
74609, A01B 7108, F16D 384, F16C 128
Patent
active
053643100
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The invention relates to agricultural and other powered equipment, and more particularly to the attachment of a guard located around a power take-off shaft extending for example between a tractor and a towed or mounted accessory or implement.
BACKGROUND ART
The specification of my European Patent No. 0086606 discloses a flexible guard suitable for location around a power take-off (PTO) shaft extending between a tractor and a towed accessory or implement. Each of the ends of the flexible guard may comprise an end coupling with hook-shaped clamps which cooperate with a raised lip on the tractor or implement housing. Different tractors and different implements housings tend to have different fixing points for the attachment of connectors and therefore a range of such attachment connectors is required to provide cooperating connector portions, to enable attachments such as guards to be connected thereto.
DISCLOSURE OF INVENTION
It is an object of the present invention to obviate or mitigate the above disadvantages.
According to the invention there is provided an attachment connector means which comprises bearing means adapted to be locatable about a PTO output/input stub of a tractor or implement.
In one aspect of the invention there is provided an use. Preferably two chains are provided, one of adjustable length and one of fixed length. The chain or chains may in some circumstances be replaced by wire ropes.
Alternatively, the means for preventing rotation may comprise a prop member carried on the outer surface of the tubular portion and to extend outwardly therefrom with its longitudinal axis transverse to the rotational axis of the bearing. The tubular portion may be cylindrical with the prop member pivotally mounted to lie generally tangentially to the outer surface thereof. Preferably the prop member is pivotally mounted to said outer surface and such mounting may be generally midway along the length of such prop member.
In a further embodiment, the means for preventing rotation may comprise one or more adjustable brackets which are connected to suitable mounting points on the tractor or implement.
With an arrangement in which the tubular portion is cylindrical, such cylindrical member may be slotted in a manner to act as the female portion of a bayonet fitting connector.
A boss member may be locatable within the bearing, such boss member carrying a disc-form member for locating over and protecting the rear surface of the base plate. The disc-form member may be surrounded by a protective collar to prevent objects such as an operator's clothing from contacting the rotating edge of the disc-form member.
An expandable, resilient cylindrical member may be located and retained thereon, for example the sleeve may have external peripheral grooves adapted to receive circlips for locating the bearing. With certain tractors and implements it may be desirable to provide a rearwardly extending tubular guard cover which is secured to the base plate. Such a cover may be rigid, or resiliently expandable.
BRIEF DESCRIPTION OF DRAWINGS
The foregoing and further features of the invention may be more readily understood from the following description of some preferred embodiments thereof, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a perspective view of a female part of a bayonet connector for attachment to a tractor or implement therefor;
FIG. 2 is a perspective view similar to FIG. 1 of an alternative embodiment;
FIG. 3 is an exploded side elevational view of a connector illustrating additional protective features;
FIG. 4 is an exploded side elevational view of a connector provided with an extension shaft;
FIG. 5 is an exploded side elevational view of a connector provided with an extension shaft and a rear cover; and
FIG. 6 is a side elevational view partly in section of a connector with a side protector for the disc-form member.
DETAILED DESCRIPTION OF DRAWINGS
Referring now to FIG. 1 of the drawings there is shown the PTO shaft can then be attached to
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patent: 4114529 (1978-09-01), Furmaga
patent: 4663984 (1987-05-01), Taylor
patent: 4702724 (1987-10-01), Vater
patent: 4747804 (1988-05-01), Bemzi
Calvert John J.
Crowder Clifford D.
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