JPS6327941B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a reduction motor in which motors with different capacities can be selectively coupled to one reduction gear.

As shown in FIG. 1, a conventional reduction motor has pilot parts 3 on both sides of a load-side bracket 2 of the motor.
1 and 32 are provided, respectively, and are fitted with pilots to the motor frame 1 and the reducer box 8, respectively. Therefore, when incorporating motors with different capacities into one reducer, the load side bracket 2 must be replaced. However, there was a drawback that standardization was not possible.

The present invention provides a reduction motor which eliminates such drawbacks, and will be explained below with reference to the drawings.

In FIGS. 2 and 3, reference numeral 1 denotes a frame 2 of a motor, which is a load-side bracket having a spigot portion 3 fitted into the frame 1, and supports a motor shaft 5 via a bearing 4. As shown in FIG.

Reference numeral 6 indicates a plurality of positioning holes provided in the flange portion 7 of the load side bracket 2, and reference numeral 8 indicates gears 9 and 1.
0 built-in reducer box with its mounting flange 11
The radial width of the mating surface 111 is wide enough to allow attachment of several types of load brackets 7 with different diameters. Reference numerals 12 and 13 indicate screw holes provided on two different radii of the mounting flange 11, and a plurality of screw holes 12 and 13 are provided on each radius.

Reference numeral 14 denotes a plurality of tightening bolts, which are screwed into either of the screw holes 12 or 13 of the mounting flange 11, depending on the motor capacity (that is, the size of the load side bracket 2).

However, in the illustrated embodiment, since a large capacity electric motor is applied, the screw holes 12 in the outer row
A tightening bolt 14 is screwed into.

15 and 16 are mounting flanges 11 of the reducer box 8
The positioning holes are provided on two different radii, and a plurality of positioning holes 15 and 16 are provided on each radius.

Reference numeral 17 denotes a plurality of positioning pins, one half of which is a spring pin, parallel pin, etc. inserted into each positioning hole 6 of the load side bracket 2, and the other half of which is used to reduce the speed according to the motor capacity, that is, the size of the load side bracket 2. Inserted into either of the positioning holes 15, 16 of the machine box 8, in the case of the illustrated embodiment, a large capacity electric motor is used.
It is inserted into the positioning hole 15 of the outer row. Note that the positioning holes 15 and 16 of the reducer box 8 may be provided in advance in two or three or more rows as shown in the figure, but they may be provided in as many as necessary depending on the size of the load bracket 2. .

FIGS. 4 and 5 show an example in which a small-capacity electric motor is combined with a speed reducer, and positioning is performed by inserting pins 17 into positioning holes 16 in the inner row. In this case, the radial width of the mating surface 71 machined on the flange portion 7 of the load side bracket 2 may be the same as the radial width of the mating surface 111 of the reducer box 8 (FIG. 4). , or may be small (Fig. 5).

As described above, the present invention combines a mounting flange of a reduction gear box with a load-side bracket that closes a load-side opening of a frame of an electric motor so as to connect the two, in which a mounting flange of a reduction gear box is provided on the flange portion of the load-side bracket. The width in the radial direction of the mating surface of the mounting flange of the reduction gear box is made larger than the radial width of the effective mating surface between the mating surface and the mating surface provided on the mounting flange of the reduction gear box, and A plurality of first positioning holes and a plurality of first screw holes are respectively formed in the circumferential direction at a first diametric position centering on the axis of the electric motor, and a plurality of first positioning holes and a first screw hole are formed in the circumferential direction at a first diametric position, and a plurality of holes are formed at a different diametrical position from the first diametric position. A plurality of second positioning holes and a plurality of second screw holes are respectively formed in the circumferential direction in the second diameter dimension device, and the first positioning hole and the first screw hole are formed in the load side bracket.
or the second positioning hole and the second screw hole, and connect the plurality of load side brackets astride the first positioning hole or the second positioning hole. Inserting positioning pins to position the load side bracket at multiple locations in the radial direction, and screwing screws into the first screw hole or the second screw hole to attach the load side bracket to the reducer box. Since they are combined, several types of motors with different capacities can be combined into one reducer, making it possible to standardize the reducer.Also, it is possible to connect the locating pin to either the first or second locating hole. By selecting and inserting
It is now possible to perform radial positioning of the reducer and load side bracket, eliminating the mutual spigot joint between the reducer and load side bracket, reducing machining steps and significantly improving productivity. Furthermore, the radial flange portion of the load side bracket can be constructed into a substantially flat plate shape, which not only simplifies the structure of the load side bracket, but also greatly shortens the axial dimension, allowing the device to be made more compact. It has the effect of

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional reduction motor, Figs. 2 and 3 are related to an embodiment of the present invention, Fig. 2 is a sectional view of the reduction motor, and Fig. 3 is a partial side view of the reduction gear box. , FIG. 4, and FIG. 5 are partial sectional views showing other embodiments of the present invention.
Note that the same reference numerals in the figures indicate the same parts. 1 is the frame of the motor, 2 is the load side bracket, 6
1 is a positioning hole, 7 is a flange portion, 71 is a mating surface, 8 is a reduction gear box, 11 is a mounting flange, 14 is a tightening bolt, 15 and 16 are positioning holes, and 17 is a positioning pin.

Claims (1)

[Claims] 1. In the case where the mounting flange of the reduction gear box is overlapped with the load side bracket that closes the load side opening of the motor frame to connect the two, the mating surface provided on the flange of the load side bracket and the reduction gear box are connected. The radial width of the mating surface of the mounting flange of the reduction gear box is made larger than the radial width of the effective mating surface with the mating surface provided on the mounting flange, and the mounting flange has the axis of the motor A plurality of first positioning holes and a plurality of first screw holes are formed in the circumferential direction at a first diametric position as the center, and a second diametrical dimension different from the first diametric position. Several second positioning holes and several second screw holes are formed in the circumferential direction at the positions, and the first positioning holes and the first screw holes, or the first screw holes are formed with respect to the load side bracket. Select one of the two positioning holes and the second screw hole, insert a plurality of positioning pins into the load side bracket across the first positioning hole or the second positioning hole, and then The load-side bracket is positioned in a plurality of locations in the radial direction, and screws are screwed into the first screw hole or the second screw hole to connect the load-side bracket to the reducer box. reduction motor.