Mechanical coupling group

Abstract

A mechanical coupling group of two devices, includes coupling body having a hollow cylindrical central portion and a first flange destined to couple with a first device, and a second flange destined to couple with a second device, threaded means being provided with a broadened head for fixing each of the two flanges to the respective device, in which the second flange comprises at least three first equidistant recesses located on a circumference thereof, and having a larger diameter than a diameter of the broadened head, a cylindrical tract branching from each recess having a diameter that is identical to a diameter of the circumference on which the threaded means lie, less one half of the diameter thereof, and a second recess facing towards the first recess and having a smaller diameter than the broadened head of the threaded means.

Claims

1. A mechanical coupling group of two devices, respectively provided with a drive shaft (4) and a driven shaft, constituted by a coupling body (1) having a hollow cylindrical central portion (11) able to contain coupled ends of the two shafts, and two end flanges (12, 13) of which a first flange (12) destined to couple with a body of the device provided with the driven shaft, and a second flange (13) destined to couple with a body provided with the drive shaft, threaded fixing means being provided with a broadened head for fixing each of the two flanges to the body of the respective device, wherein the second flange (13) coupling with the body of the device provided with the drive shaft comprises at least three first equidistant recesses (131) located on a circumference thereof, and having a larger diameter than a diameter of the broadened head of the threaded fixing means of the flange, a cylindrical tract (132) branching from each recess having a diameter that is identical to a diameter of the circumference on which the axes of the threaded means reduced by a half of the diameter thereof are located, which cylindrical portion terminates in a second recess (133) facing towards one of the first recesses and having a smaller diameter than the broadened head of the threaded fixing means.

2. The mechanical coupling group according to claim 1 wherein the first recesses present on the second flange are four in number.

3. The mechanical coupling group according to claim 1 wherein the device provided with the drive shaft is an electric motor.

4. The mechanical coupling group according to claim 1 wherein the device provided with the drive shaft is an internal combustion engine.

5. The mechanical coupling group according to claim 1 wherein the device provided with the driven shaft is a pump.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) The advantages and constructional characteristics of the invention will more clearly emerge from the detailed description that follows which, with the aid of the appended tables of drawings, illustrates a preferred embodiment of the invention, provided by way of non-limiting example.

(2) FIG. 1 illustrates the object of the invention in a perspective view.

(3) FIG. 2 illustrates the assembly diagram of the invention in a perspective view.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

(4) The figures illustrate the coupling body 1 of a pump 2 to the respective actuating motor 3.

(5) The coupling body 1 exhibits a central portion 11, cylindrical, hollow and having any section, provided with a first flange 12 and a second flange 13.

(6) The first flange 12 has a square plan, and has four holes 121 located at corners thereof.

(7) The second flange 13 also has a square plan, and has four first circular recesses 131 located substantially halfway along the sides.

(8) A cylindrical portion 132 branches, in the same direction, from each of the first recesses 131, at the end of which a second recess 133 is located facing towards the first recess 131 from which the cylindrical portion 132 branches.

(9) The side of the motor 3 to which the pump 2 is fixed has a flat surface 31 provided with four equidistant holes 32 located on a same circumference.

(10) A bolt 33 is screwed into each of the holes 32 having a broadened head 331.

(11) The diameter of the broadened head 331 is smaller than the diameter of the first recesses 131, but is greater than the diameter of the second recesses 133.

(12) The drive shaft 4 is located at the centre of the four holes 32, which drive shaft 32 is provided with a keyed coupling 41 able to receive the joined coupling present on the driven shaft (not illustrated).

(13) The functioning of the coupling body of the present invention is as follows.

(14) First the body 1 is fixed to the body of the pump 2 by screwing the bolts 122 inserted into the holes 121 of the pump 2 body.

(15) The bolts 33 are then screwed into the holes 32 present in the body of the motor, taking care to leave a distance between the broadened head 331 and the flat surface 31 of the body of the motor that is just a little greater than the thickness of the second flange 13.

(16) At this point the shaft of the motor 4 and the driven shaft of the pump 2 are axially inserted, with the coupling body 1 already stably fixed to the body of the pump 2.

(17) The insertion is made possible by the passage of the broadened heads 331 of the bolts 33 in the first recesses 131 of the second flange 13.

(18) The body of the pump 2 and the coupling body 1, already fixed to the pump 2, are then rotated in anticlockwise direction (FIG. 2), and the stem of the bolts 33 then slides on the cylindrical portion 132 of the second flange 13 up to locating in the second recess 133 of the second flange 13.

(19) In this position the broadened head 331 of the bolts 33 goes beyond the second flange 13, and a small blocking rotation of the bolts 33 stably fixes the pump 2 and the coupling body 1 to the body of the motor.

(20) The aims of the invention are thus attained, as it is no longer necessary either to make the holes of the motor body coincide with the holes of the second flange 13 of the coupling body 1, or to perform a complete screwing rotation of the bolts which fix the second flange of the coupling body to the body of the motor.

(21) The invention is understood not to be limited to the embodiment described above, and variants and improvements thereto can be made without forsaking the scope of protection of the claims that follow.

(22) In particular the invention is applicable in all cases in which the mechanical coupling of two devices is to be obtained, of which one provided with a drive shaft and one provided with a driven shaft.