JPS5838526A - Rotary brush drive apparatus of electric cleaner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating brush drive device for an electric 911 remover.

As shown in FIG. 1, a conventional applied type vacuum cleaner has a nozzle part 2 pivotally connected to the lower part of a scrubbing machine body l. This nozzle part 2 has a back plate 3 arranged at its lower part, a bumper 4 attached from the front end face to both side faces, and a rotary brush switching lever 5 and a rung 6 arranged at the upper part. Further, the vacuum cleaner body 1 has a dust bowl lid 8 detachably attached with a buckle 7 on its front surface, a switch button 9 arranged on its upper part, and a handle 11 with a hand droplet 10 attached on its upper end surface.

The internal structure of the nozzle part 2 in such a vacuum cleaner is as shown in FIG.
The rotational brush 16 is rotated by transmitting it to the rotating brush 16 through the belt 15 which is connected to the fourth section K. In addition, the rotating brush 16
is rotatably fixed to the nozzle portion 2 via a bearing 17.

When cleaning with this vacuum cleaner, the rotary brush 16 is rotated to scrape up the dust on the floor and the carpet, and the electric motor 12
The dust will be sucked in and collected from the V&Kirafuan, which is installed in one piece. However, since the rotating brush 16 and the drive shaft 13 are directly connected by the belt 15, if the rotating brush 16 gets caught in the edge of the carpet and becomes locked, the bell 15 is also locked together with the U-rolling brush 16, and the belt 15 is locked. 15 and the drive shaft 13 of the electric motor 12, and the belt 15 breaks due to the frictional heat.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rotating brush drive device for a vacuum cleaner in which the 1'' transmission mechanism from the electric motor to the rotating brush is not damaged even if the rotating brush moves awy.

An example of this invention! This will be explained using Figures 3 and 4. FIG. 3 shows the internal structure of the nozzle part 2 of this embodiment. from the second pulley 21 of the clutch device [19] to the pulley 24 of the rotating brush 23 via the belt 22.
3 will be rotated. The pulley 20 of the clutch device fll19 has an outer diameter 5 to 7 times that of the drive shaft 13 of the electric motor 12, and reduces the rotational speed of the electric motor 12 to rotate the rotating brush 23.
It plays a role in conveying information to

Inside the clutch device 19, as shown in FIG. Each convex portion 27 of the spring body 27 is arranged with a concave-convex ring-shaped spring body 27 inside the cylinder.
A field is made to protrude intermittently from the outer circumferential surface of the small-diameter cylindrical rotating body 26 along the local direction, and a recess is made intermittently on the inner circumferential surface of the large-diameter cylindrical rotating body 25 along the local direction. 28 and each convex portion 271 of the spring body 27 is formed in the concave portion 28.
are fitted into these rotary bodies 25 and 26, respectively, and the first and ts2 data! J20#21 (Fig. 3) are connected to each other.

Now, when the electric motor 12 is started, its rotation is caused by the belt 18.
It is transmitted to the pulley 20 via the large diameter cylindrical rotating body 25 to rotate it. During steady rotation, this large diameter cylindrical rotating body 2
5 and the spring body 27, rotation of the drive shaft 13 is transmitted to the rotating brush 23. On the other hand, if the rotating brush 23 wraps around the edge of the carpet and becomes locked, the small diameter cylindrical rotating body 26 and therefore the spring body 27
3 and 1c I:l v at the same time, the large diameter cylindrical rotating body 25 tries to make 11 rotations, so the large diameter cylindrical...1 rolling body 25 touches the convex portion 27m of the spring body 27. You're going to ride on it and push this in the radial direction. As a result, the spring body 27 is deformed, and the convex portion 27J1 is transferred to the concave portion 2 of the rotating body 25.
8, the engagement with the rotating body 25 is released, the rotation of the drive shaft '13 is no longer transmitted to the rotating brush 23, and the rotation of the drive shaft '13 is mainly caused by slipping between the rotating body 25 and the spring body 27. Next, when the rotating brush 23 is unlocked, the spring body 27 returns to its shape again, the convex portion 27g fits into the concave portion 28, and the engagement between the U-rolling body 25 and the spring body 27 is restored. Rotation transmission from the drive shaft 13 to the rotating brush 23 is restarted.

In this way, since the drive shaft 13 and the rotating brush 23 are connected by both bells 18 and 22 via the clutch device 19, when the rotating brush 23 is locked, the engagement between the drive side and the rotating brush side is released by the clutch device 19. In order to be
There is no danger of the belt breaking as with conventional vacuum cleaners.

Furthermore, when the mouth weight of the rotating brush 23 is released, the clutch device 19 automatically restores the engagement between the drive side and (2) the rotating brush side, which is a very useful effect.

As shown in FIG. 5, large ball guides 26a' extending intermittently in the radial direction along the circumferential direction are formed on the outer circumferential surface of the small diameter cylindrical rotating body 26', and these guide holes 26a'
A ball 29 is inserted into each of the small diameter cylindrical rotating body 26.
Each convex part 2 of the concave-convex ring-shaped spring body 27/ arranged in the cylinder of '
7a' urges each ball 29 to protrude outward from the small diameter cylindrical rotating body 26', and a portion of each ball 29 is fitted into each recess 28 of the large diameter cylindrical rotating body 25. If the clutch device 30 is used, the sliding movement between the inner circumferential surface of the rotating body 25 and the ball 29 becomes smooth when the rotating brush 23 is locked, and the life of the clutch device 30 can be extended.

As described above, the rotating brush drive device for a vacuum cleaner of the present invention includes an electric motor, a rotating brush, and a clutch that transmits the rotation of the electric motor to the rotating brush and idles when a predetermined torque is exceeded. Even if the rotating brush is locked, the rotation transmission mechanism between the electric motor and the rotating brush will not be damaged.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional vacuum cleaner, Fig. 2 is a diagram showing the internal structure of the nozzle part, Fig. 3 is a diagram showing the internal structure of the nozzle part of an embodiment of the present invention, 5 is a cross-sectional view of the Kura-Shizukuchi device, and FIG. 5 is a cross-sectional view showing a modification thereof. 12... Electric motor, 19... Clutch device, 23...
・Rotating brush, 25...Large diameter cylindrical rotating body, 26.26
'...Small diameter cylindrical rotating body, 26a'...Guide hole, 2
7.27'...Spring body, 27a #27a'...
Convex portion, 28... Concave portion, 29... Ball Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] (1) A rotating brush drive device for a t5JC vacuum cleaner, comprising an electric motor, a rotating brush, and a clutch that transmits the rotation of the electric motor to the rotating brush and idles when a predetermined torque is exceeded. . (2) The clutch has a small diameter cylindrical rotating body concentrically inserted into the large diameter cylindrical rotating body so as to be freely rotatable, and a concave and convex ring-shaped spring body arranged inside the cylinder of the small diameter cylindrical rotating body. Each convex part is made to protrude intermittently from the outer peripheral surface of the small diameter cylindrical rotating body along the local direction, and recessed parts are intermittently formed on the inner peripheral surface of the large diameter cylindrical rotating body along the local direction. and each convex part of the spring body is fitted into the concave part, and the I'ff power distribution motor and the rotary brush are respectively connected to both of these rotary bodies. Rotating brush drive. (3) The clutch has a small diameter cylindrical rotating body concentrically rotatably mounted in a large diameter cylindrical rotating body, and the clutch is arranged in a radial direction intermittently along the circumferential direction on the outer peripheral surface of the small diameter cylindrical rotating body. Balls are inserted into the respective guide holes, and each ball is inserted into the small diameter cylindrical rotor by each convex part of the convex and convex ring-shaped spring body arranged inside the cylinder of the small diameter cylindrical rotor. , and intermittently forms recesses along the local direction on the inner circumferential surface of the large-diameter cylindrical rotating body, and a part of each ball is fitted into the recesses. Claim No. 3, wherein the front electromotive motor and the rotating brush are connected to the body, respectively.
1) The rotating brush drive device for a vacuum cleaner according to item 1).