Machine element or mechanism – Gearing – Directly cooperating gears
Patent
1995-01-03
1996-11-12
Herrmann, Allan D.
Machine element or mechanism
Gearing
Directly cooperating gears
74417, 74606R, 403331, 403381, F16H 5702, F16H 114, F16H 116
Patent
active
055729061
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is the U.S. national phase of PCT application PCT/AT93/00076 filed 3 May 1993 with a claim to the priority of Austrian application A 903/92 filed 4 May 1992.
FIELD OF THE INVENTION
The invention relates to a transmission housing, in particular for an angle, e.g. worm-type, transmission that has a throughgoing in particular cylindrical passage which runs longitudinally of an extruded profile forming the housing, that has outwardly open grooves that open at planar outer faces of the housing that in turn are inclined to each other preferably at 90.degree., and that has starting from one of the planar outer faces a bore which is formed in the housing and whose surface joins the surface of the passage extending longitudinally through the extruded profile.
BACKGROUND OF THE INVENTION
A housing of this type is known from German published patent application 2,944,398 where the outer face of the housing body has three longitudinally extending recesses for receiving threaded bolts that extend all the way through and secure two housing covers with each other. The walls of the recesses diverge outwardly so that the connecting bolts can be inserted transversely to their longitudinal axes into the recesses. Problems are encountered with such a housing when the housing is to be secured to a machine or when it is to be mounted on a flange motor.
OBJECT OF THE INVENTION
It is therefore an object of the present invention to provide and improved transmission housing.
SUMMARY OF THE INVENTION
The invention proposes a solution in that the grooves are undercut, in particular to be T-shaped, trapezoidal, or dove-tail-shaped, and the mouths of the grooves at the outer faces are the groove regions of minimal width. This constructions makes it possible to secure the housing on a machine by screws whose heads are inserted in the undercut grooves so that the housing can sit with the respective planar outer face flat against the support surface of the machine. Similarly a motor can be flange mounted, with its flange sitting flush on the outer face.
In a further embodiment of the housing according to the invention an angle, preferably a worm-drive, transmission, can be provided with the above-described housing.
It is known from above-named German published application 2,944,398 to form the bore for receiving the worm as a throughgoing bore. The throughgoing bore is thus closed at both of its ends by covers which position in the bore the roller bearings provided for rotatably supporting the worm shaft. The outer races of the roller bearings thus contact the bore wall and are supported from the side by the respective cover. The inner race of each roller bearing bears against an end face of the worm body. In this arrangement there are two locations in the bore to be sealed. In addition the bore needs to be machined in order to mount the roller bearings properly by means of their outer races.
It is another object of the invention to simplify this system. This is achieved in an angle, in particular in a worm-drive, transmission of the above-described type where the shaft carrying the drive gear (worm) has a bearing, in particular a roller bearing provided in a housing that is flanged to the extruded profile with the flange lying on one of that one of its outer faces from which the bore extends and where the housing holding the bearing is the housing of a flange motor whose rotor shaft carries on its free end the drive gear (the worm) or that the drive-gear shaft traverses the bearing housing and the second bearing, in particular a needle bearing, is arranged in the housing formed by the extruded profile in a housing bore formed as a blind bore. This arrangement has the advantage that at least one bearing of the drive gear or the worm is situated in a separate housing and can therefore be machined independently of the transmission housing so that the transmission housing needs no further machining at least with respect to mounting the worm except for the formation of the b
REFERENCES:
patent: 3420117 (1969-01-01), Gossett
patent: 3521504 (1970-07-01), Jorg
patent: 3992956 (1976-11-01), Fischer
patent: 4020715 (1977-05-01), Sollars
patent: 4580329 (1986-04-01), Bihler et al.
patent: 4641805 (1987-02-01), Martensson IV
Dubno Herbert
Herrmann Allan D.
Wilford Andrew
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