US2704460A

US2704460A - Motion transforming device

Info

Publication number: US2704460A
Authority: US
Publication date: 1955-03-22
Anticipated expiration: 1972-03-22

Description

March 22, 1955 J. CALABRESE MOTION TRANSFORMING DEVICE 2 Sheets-Sheet 1 Filed Oct. 2 1950 March 22, 1955 J. CALABRESE MOTION TRANSFORMING DEVICE 2 Sheets-Sheet 2 Filed Oct. 2, 1950 A INVENTOR United States Patent MOTION TRANSFORMING DEVICE Luis Jos Calabrese, Buenos Aires, Argentina Application October 2, 1950, Serial'No. 193,435

6 Claims. (Cl. 74-70) The present invention relates to a motion transforming device whereby uniform circular motion may be changed into a simple oscillatory motion, which device shall be particularly useful when applied to machines for finishing footwear, and shall also be applicable in other fields for actuating apparatus such as screwing devices, vibrators and the like.

The devices for transforming motion known to the prior art suffer from a serious drawback inasmuch as they are of highly complex construction and are consequently expensive, complicated in operations and difficult and costly as regards their maintenance.

The device according to the present invention, which is intended to overcome the above-mentioned objection and the drawbacks arising therefrom, comprises essentially a rotary disc mounted on a driving shaft and an oscillatory disc mounted on an arbor perpendicular to the driving shaft, the plane in which the oscillations of the oscillatory disc take place being alined with the longitudinal centerline of said arbor, the two plates being in mutual contacting engagement, the

points of contact common to the two discs defining a plane surface which is oblique to the axis of rotation of the disc first mentioned.

Hence the chief object of the present invention is to provide a motion transforming device whereby uniform circular motion may be transformed into simple oscillating motion by means of a simple constructive and functional combination of a few elements of simple construction, which combination shall be easy to garry into practice and to keep in proper working con ition.

Another object is to provide a device of the kind described which shall be of low weight and small bulk.

Still another object is to provide a device of the kind described which shall be applicable to machines requiring the aforesaid transformation of motion, without calling for important structural changes in such machines.

These and other objects and advantages of the present invention will become apparent in the course of the following description of a preferred embodiment thereof which has been illustrated by way of, example in the accompanying drawings.

In the drawings:

Fig. 1 is a front elevation of the motion transforming device of the present invention, showing the general structure thereof and illustrating the parts of the device in one of the positions limiting its operation.

Fig. 2 is a side elevation of said device drawn to a larger scale and showing the parts thereof in another operative position.

As shown in the drawings the device of the present invention comprises in general a metal housing a in the shape of a hollow rectangular prism having an aperture in one of its faces, for which aperture a cover b is provided which is also of metal, and is preferably dome shape and has in its upper part a cylindrical opening 1 surrounded on the outside by a frusto-conical surface 1' which forms a seat for a frusto-conical portion 2 of the carcass of an electric motor 0 the uniform circular motion of the shaft 3 of which is to be transformed into simple oscillatory motion.

Inside said housing a I provide what I may designate as the device properly so called that is to say the essential mechanism thereof which comprises a first plate 8 2,704,460 Patented Mar. 22, 1955 or disc d the lower face 4 of which is oblique with respect to the axis of said disc, the other or upper face 4' thereof having a tubular, coaxial projection or boss 5, the cylindrical bore of which receives the end of the shaft 3 of said electric motor c said disc being thus secured to the shaft 3 as with the aid of a set screw 6. Due to the fact that the disc is mounted coaxially on the shaft, the aforesaid lower face 4 of the disc maintains its degree of obliquity with respect to the second disc which is just the result desired, for reasons which will be given hereinbelow.

Against the face 4 of said disc d, there is applied a second plate or disc e of cylindrical shape, provided on its lower face 7 opposed to the upper face 7' facing the disc d, with two diametrically opposite supports 8. Between the two discs is located a ball hearing 9 to reduce the friction between the discs during operation, because although disc d rotates, the other disc e does not, since it is mounted for oscillation on a shaft 10, which in turn is mounted transversely of housing a by means of supports 11 provided in two op posite walls of said housing, said shaft 10 projecting beyond said walls for connection to the means to which simple oscillating motion is to be imparted.

The second disc e is mounted on the oscillatory shaft 10 by means of a connection member 12 fast on shaft 10 and having a portion 12 included between the supports 8 of said disc, said portion 12' having a cylindrical perforation 13 running perpendicularly to shaft 10 and above the same. Perforation 13 is alined at both ends with similar perforations 8 on said supports 8, whereby a pin 14 may be located in said three perforations so as to provide a swinging connection between said member 12 and the second disc e.

It should be noted that, in order to prevent slipping of the ball bearing 9 with respect to the second disc e, the latter has a cylindrical cavity or set 7" 'in which said ball bearing is located.

In operation, when the first disc or plate d is rotated by the electric motor 0, and starting from the position of the parts shown in Fig. l, the second disc or plate e is obliged to become angularly or simultaneously displaced about the pin 14 and the shaft 10. The first displacement does not make itself felt as any transformation of the uniform circular motion of disc d, but such transformation does result from the second of said displacements since as disc e moves about shaft 10 it causes said shaft to rotate with the disc about the axis of the shaft, until disc d reaches the position shown in Fig. 2 which corresponds to a displacement of from the starting point, whereupon the sense of the displacement is inverted so that said shaft 10 commences to return to its original position, which it reaches when plate d is at a position diametrically opposite the one shown in Fig. 1. After plate e passes through said position, it continues to be displaced about shaft 10 without in any way changing its direction of motions, but an inversion thereof takes place when plate d reaches a position diametrically opposite the position shown in Fig. 2, whereupon said discs and shaft return to their starting positions as shown in Fig. 1.

It is to be understood that although I have described the present invention with particular reference to a preferred embodiment, I do not desire to be limited thereby but may make therein such modifications as fall within the scope of the appended claims.

I claim:

1. A motion transforming device applicable particularly to machines for finishing footwear, said device comprising a driving shaft, a cylindrical metal rotary plate having one face oblique to the axis thereof, and an opposite face, a cylindrical tubular projection centrally disposed on said opposite face, a driving shaft extending into said projection, and being secured thereto, thereby permitting the driving shaft to drive said rotary disc, a cylindrical oscillatory plate having a first face adjacent to and operatively associated with said oblique face and a second face parallel to said first face, a pair of diametrically opposite supports located on said second face, a connection member located between said supports, said supports and said connection member being perforated, the perforations being alined with each other and extending parallel to a diameter of said oscillatory plate, a body pin extending through said perforations to pivotally couple said connection member to said supports and a driven shaft coupled to said connection member.

2. In a motion transforming device adapted to be used on machines for finishing footwear, a housing, a cover detachably connected to said housing and provided with a frusto-conical seat for receiving a portion of a motor, a driving shaft connected to said mtor and extending into said housing, a first plate provided with a boss having a cylindrical bore for receiving an end of said driving shaft, a set screw for securing said boss to said shaft, the lower face of said plate being arranged obliquely with respect to the longitudinal axis of said shaft, a second plate of cylindrical shape arranged contiguous to the oblique face of said first plate, a pair of diametrically opposed supports connected to said second plate, a driven shaft, means operatively connecting said driven shaft to said second plate, there being a recess'in said second plate, and a ball bearing seated in said recess and interposed between said pair of plates, the diameter of said second plate being greater than the diameter of said first plate, the longitudinal axis of said driving shaft being arranged at right angles with respect to the longitudinal axis of said driven shaft.

3. In a motion transforming device adapted to be used on machines for finishing footwear, a housing, a cover detachably connected to said housing and provided with a frusto-conical seat for receiving a portion of a motor, a driving shaft connected to said motor and extending into said housing, a first plate provided with a boss having a cylindrical bore for receiving an end of said driving shaft, a set screw for securing said boss to said shaft, the lower face of said plate being arranged obliquely with respect to the longitudinal axis of said shaft, a second plate of cylindrical shape arranged contiguous to the oblique face of said first plate, a pair of diametrically opposed supports connected to said second plate, a driven shaft, means operatively connecting said driven shaft to said second plate, there being a recess in said second plate, and a ball bearing seated in said recess and interposed between said pair of plates, said means comprising a connecting member mounted on said driven shaft and having a portion provided with a cylindrical opening, said opening 4 being arranged in registry with openings in said supports, and a cylindrical pin extending through said registry openings, the longitudinal axis of said driven shaft being arranged at right angles with respect to the longitudinal axis of said pin.

4. A motion transforming device comprising a hollow housing, a cover detachably connected to said housing and provided with a frusto-conical seat for receiving a portion of a motor, a driving shaft connected to said motor and extending into said housing, a first circular rotatable plate provided with a cylindrical boss having a cylindrical bore therein, said bore adapted to receive an end of said driving shaft, 21 set screw for securing said boss to said shaft, the lower face of said plate being arranged obliquely with respect to the longitudinal axis of said shaft, a second circular non-rotary oscillating plate of cylindrical shape arranged contiguous to the oblique face of said first plate, a pair of diametrically opposed supports connected to said second plate, a driven shaft, means operatively connecting said driven shaft to said second plate, there being a recess in said second plate, and a ball bearing seated in said recess and interposed between said pair of plates, said means comprising a connecting member mounted on said driven shaft and having a portion interposed between said supports and provided with a cylindrical opening, said opening being arranged in registry with openings in said supports, and a cylindrical pin extending through said registering openings, the longitudinal axis of said driven shaft being arranged at right angles with respect to the longitudinal axis of said pin.

5. The apparatus as described in claim 4, wherein the diameter of said second plate is greater than the diameter of said first plate, the longitudinal axis of said drive shaft being arranged at right angles with respect to the longitudinal axis of said driven shaft.

6. The apparatus as described in claim 5, wherein said motor transforming device is adapted to be used on machines for finishing footwear.

References Cited in the file of this patent UNITED STATES PATENTS 159,742 Barker Feb. 16, 1875 268,846 Weller Dec. 12, 1882 1,591,208 Boerngen July 6, 1926 1,698,827 Skolnick Jan. 15, 1929 2,542,158 Soderberg Feb. 20, 1951