JPS6219082Y2 - - Google Patents

Description

[Detailed Description of the Invention] Technical Field This invention provides an electric motor body having a drive shaft to which a pulley is detachably attached.A pulley connected to the pulley of the drive shaft via a transmission belt is detachably attached. The present invention relates to a mounting device for an electric motor body to be mounted at a predetermined position on a frame body having a driven shaft.

Conventionally, in machine tools, etc., an electric motor body is attached to a frame body that rotatably supports a tool such as a drill, and the rotation of a drive shaft on the side of the electric motor body is transmitted to the frame via a drive pulley, a transmission belt, and a driven pulley. The power is transmitted to the driven shaft on the main body side, and as the driven shaft rotates, the tool is rotated. In conventional machine tools of this kind, the electric motor body is removably attached to the frame body using a plurality of tightening bolts, etc., and when the electric motor body is removed from the frame body, the drive pulley on the drive shaft is connected to the motor body. The rotation speed of the tool can be changed by replacing one or both of the driven pulleys on the driven shaft with ones of different diameters and changing the rotation ratio of the driven shaft to the drive shaft.

However, with this conventional mounting device, if the tightening bolts are removed when replacing the pulley, the motor body separates from the frame body. In machine tools, etc., where there is a risk of the motor body falling, it is extremely dangerous, and only one worker should perform work such as attaching and detaching the motor body to the frame body and attaching and detaching the transmission belt to both pulleys. This was extremely difficult.

Purpose The purpose of this invention is to eliminate the defects in the conventional mounting device as described above, and to prevent the electric motor body from separating from the frame body even if the action of the mounting means such as the tightening bolt is released when replacing the pulley. We have developed a new motor body mounting device that allows you to safely and easily perform work such as attaching and detaching the motor body to the frame body, attaching and detaching the transmission belt to both pulleys, and replacing the pulleys without any danger of the motor body falling off. It is about providing.

Embodiment Hereinafter, an embodiment of this invention will be described with reference to the drawings.
is fitted and supported, and a drive shaft 4 is installed in the stator 3.
A rotor 5 having a diameter is inserted therein. An end bracket 8 is attached to the open end of the case 2 by an annular mounting plate 6 and a plurality of tightening bolts 7, and the drive shaft 4 is rotatably inserted and supported in the center of the bracket 8 via a bearing 9. ing. Drive shaft 4
A large-diameter toothed drive pulley 10 is removably inserted into the tip of the drive pulley 10 , and is fixed by a fixing screw 13 via a flat washer 11 and a spring washer 12 . An end bracket 8 is installed so as to cover the drive pulley 10.
A substantially box-shaped pulley case 14 as a mounting member having openings 14a and 14b on both sides is attached to the outer surface of the pulley case 14 with a plurality of tightening bolts 15, and a through hole continuous to the opening 14a on one side is provided in the center of the lower surface. 1
6 is formed.

On the other hand, a driven shaft 18 for transmitting rotation to the tool is rotatably supported on the frame main body 17, which has a tool (not shown) such as a drill attached to its tip. The pulley case 14 on the motor body 1 side is attached to the base end of the frame body 17 so that their axes are parallel to each other. Inside the pulley case 14, a small-diameter toothed driven pulley 19 is disposed at the tip of the driven shaft 18.
is removably inserted and fixed by a fixing screw 22 via a flat washer 20 and a spring washer 21. A toothed transmission belt 23 is hung between the drive pulley 10 and the driven pulley 19, and as the drive shaft 4 rotates, the driven shaft 18 is moved to a predetermined position via the drive pulley 10, the transmission belt 23, and the driven pulley 19. It is designed to rotate at a speed increasing ratio of .

Therefore, the support and attachment structure of the electric motor body 1 to the frame body 17 will be explained in detail.A support piece 24 is formed protruding from the upper surface of one side of the peripheral edge of the pulley case 14, as shown in FIGS. A pin body 25 is fitted near the upper end thereof and extends substantially tangentially to the peripheral edge of the pulley case 14. On the other hand, a support plate 26 having a substantially U-shaped front face is fixed to the upper surface of the base end of the frame main body 17 by a pair of mounting screws 27, and the legs on both sides of the support plate 26 are
Insert both ends of the pin body 25 into the pin body 2.
Long groove part 2 rotatably and slidably supports 5.
8 are formed to extend in the direction in which the transmission belt 23 is stretched.

1, 2 and 4, the mounting flange 29 protruding from the lower side of the periphery of the pulley case 14 and the mounting piece 30 protruding from the upper side of the periphery of the frame body 17 each have two elongated holes 31 extending in the vertical direction, and elastic rings 32 made of rubber are fitted and fixed in the elongated holes 31. Screw holes 33 are formed in the base end surface of the frame body 17 and one side surface of the pulley case 14 corresponding to the elongated holes 31, and when the vertical relative positional relationship of the electric motor body 1 to the frame body 17 is adjusted and the transmission belt 23 between the two pulleys 10, 19 is tensioned as shown in FIG. 1, the fastening bolts 3 constituting the mounting means are inserted into the screw holes 33 through the elastic rings 32 in the elongated holes 31.
4 are screwed together to form the electric motor body 1
and the frame body 17 can be attached and fixed at their peripheral edges.

In this embodiment, as shown in FIG. 4, the outer diameter of the threaded portion of the tightening bolt 34 is slightly larger than the inner diameter of the elastic ring 32, and as shown in FIG. 34 is loosened and removed from the screw hole 33, the threaded portion of the tightening bolt 34 is held by the elastic ring 32, and the elongated hole 3
It is designed not to fall off from 1.

The operation of the electric motor body mounting device configured as described above will now be described.

Now, in Figure 1, the motor body 1 is the frame body 17.
This figure shows the state in which it is attached to a predetermined position. When the drive shaft 4 is rotated by starting the electric motor body 1 in this state, the driven shaft 18
is rotated at a predetermined speed increasing ratio, and the tool on the frame body 17 is rotated along with the rotation.

Next, one or both of the drive pulley 10 on the drive shaft 4 and the driven pulley 19 on the driven shaft 18 are replaced with one having a different diameter, and the rotation ratio of the driven shaft 18 to the drive shaft 4 is changed. When changing the rotation speed of the tool, first loosen the four tightening bolts 34 to release the pulley case 14 from the frame body 17. As a result, the electric motor body 1 moves downward due to its own weight, and the downward movement of the electric motor body 1 is prevented with the pin body 25 engaged with the lower end of the long groove portion 28 as shown by the chain line in FIG. Transmission belt 23 between both pulleys 10 and 19
is relaxed. Therefore, once the tightening bolts 34 are loosened, there is no danger that the electric motor body 1 will fall off from the frame body 17, which is extremely safe. Moreover, since each of the tightening bolts 34 is elastically clamped and held within the elongated hole 31 by the elastic ring 32 in a state in which the tightening bolts 34 are detached from the screw hole 33, the tightening bolts 34 are
There is no risk of powder falling from the elongated hole 31 and loss of powder.

With the motor body 1 moved downward and the transmission belt 23 loosened, the pulley case 1
4, insert a finger or a belt remover etc. into the lower through hole 16, and remove the transmission belt 23 from above the driven pulley 19.
Remove. Thereafter, when the motor body 1 is rotated counterclockwise in FIG. 1 about the pin body 15 supported at the lower end of the long groove portion 18, the driving pulley 10 and the driven pulley 19 are rotated as shown in FIG. is exposed to the outside. Therefore, in this state, those pulleys 1
One or both of 0 and 19 can be easily replaced with one of a different diameter.

Also, after replacing the pulleys 10 and 19, the transmission belt 23 is hung on the drive pulley 10 side, and the electric motor body 1 is
When the pulleys 10 and 19 are rotated clockwise from the state shown in FIG. In this state, the transmission belt 23 is applied to the driven pulley 19 through the lower through hole 16 of the pulley case 14, and the motor body 1 is moved upward to tension the transmission belt 23 between the two pulleys 10 and 19. Thereafter, when each of the tightening bolts 34 is adjusted by moving vertically within the elongated hole 31 and screwed into the screw hole 33, the electric motor body 1 is moved to a predetermined position on the frame body 17, as shown in FIG. It is firmly attached and fixed.

Note that this invention is not limited to the configuration of the above embodiment; for example, the pulley case 14 as a mounting member is attached to the end bracket 8 of the motor body 1.
Contrary to the above embodiment, the pin body 25 is provided on the frame main body 17 side and the long groove portion 28 is provided on the pulley case 14 side as a mounting member, etc., without departing from the spirit of this invention. It is also possible to arbitrarily change the configuration of each part within the range.

Effects As detailed above, this device prevents the electric motor body from sliding onto the frame body due to the engagement between the pin body and the long groove, even if the action of the mounting means such as the tightening bolt is released when replacing the pulley. Since it is supported, there is no danger of the electric motor body separating from the frame body and falling, and it is possible to safely and easily attach and detach the electric motor body to the frame body and the transmission belt to both pulleys. or,
In this invention, when the pulley is replaced, the electric motor body is supported on the frame body, and the driving pulley and the driven pulley are arranged close to each other, so that the pulley can be easily replaced.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway side view showing an embodiment of this invention, Fig. 2 is a partially cutaway side view showing the state in which the motor body is rotated by loosening the tightening bolt, and Fig. 3 is the same as Fig. 1. FIG. 4 is a partial cross-sectional view longitudinally showing the engagement structure between the pin body and the long groove in the state shown in FIG. 1; FIG. It is. Electric motor body...1, Drive shaft...4, Drive pulley...
...10, Pulley case...14, Frame body...
...17, Driven shaft...18, Driven pulley...19,
Transmission belt...23, Pin body...25, Support plate...
…26, Long groove portion…28, Screw hole…33, Tightening bolt…34.

Claims (1)

[Claims for Utility Model Registration] A drive shaft 4 to which a pulley 10 is detachably attached.
a mounting member 14 provided at one end of the motor body 1 so as to cover the pulley 10; and a mounting member 14 to which the motor body 1 is removably attached at its peripheral edge. a frame body 17 having a driven shaft 18 to which a pulley 19 connected to the pulley 10 of the drive shaft 4 via a transmission belt 23 is removably attached; A pin body 25 is provided on one of the opposing peripheral edges of the mounting member 14 and the frame body 17 and extends in the direction in which the transmission belt 23 is tensioned. The motor body 1 is provided with a long groove portion 28 in which the pin body 25 is rotatably and slidably inserted and supported, and after releasing the fixation between the mounting member 14 and the frame body 17, the electric motor body 1 is A mounting device for an electric motor body that can rotate and slide relative to a frame body 17 by means of a groove portion 28 and a pin body 25.