JPS6327656Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a vacuum cleaner with a rotating brush.

In a conventional general vacuum cleaner with a rotating brush, the rotation of the motor 2 in the main body 1 is applied between the motor shaft 3 and the pulley 4 of the rotating brush 6, as shown in FIG. 3, which shows the suction port. It is directly transmitted to the rotating brush 6 by the stretched belt 5. The rotating brush 6 is rotatably supported on the nozzle body 8 via a bearing 7. In this case, if the rotating brush 6 gets caught in the edge of the carpet and becomes locked, the belt 5 will also be locked by the pulley 4, and a slip will occur between the belt 5 and the motor shaft 3, causing the belt 5 to break. Then there is the problem.

Therefore, in the present invention, a centrifugal clutch device is interposed in the power transmission system between the motor and the rotating brush, and this centrifugal clutch device is connected to a drive-side pulley with a belt stretched between it and the motor shaft of the motor. a second drum connected to a driven pulley having a belt stretched between the first drum and the rotating brush, and located on the outer periphery of the first drum;
A first arm positioned in the outer circumferential direction of the second drum, supported by the drive pulley, and biased by a spring so as to be in contact with the outer circumferential surface of the second drum; a second arm that is positioned and pivoted by the driven pulley and is biased by a spring so as to separate from the inner circumferential surface of the first drum; ,
The second drum and the first arm constitute first and second switches, and an alarm means whose operation is controlled by these first and second switches is connected to a power supply circuit, and a centrifugal clutch device is used. This system avoids slippage of the power transmission belt and prevents belt breakage, and also indicates that the rotating brush is in a locked state using an alarm means such as a light emitting element for operation display. An embodiment of the invention will be described based on the drawings.

Figure 1 is an external view of a vacuum cleaner with a rotating brush.
There is a nozzle part 10 below the main body 9, this nozzle part 10 is provided with a back plate 11, an illumination lamp 12, and a bumper 13, and the main body 9 has a buckle 14.
A dust box lid 15 having a dust box lid 15, a changeover switch 16, a handle 19 having a grip 17 and a hand switch 18 are attached.

FIG. 2 shows the internal structure of the nozzle part 10,
Components having the same functions as those in FIG. 3 are given the same reference numerals. Reference numeral 20 denotes a centrifugal clutch device interposed in the power transmission system between the motor 1 and the rotating brush 6. The rotation of the motor shaft 3 is transmitted to the centrifugal clutch device 20 via a belt 21, and further via a belt 22. and is transmitted to the pulley 23 of the rotating brush 6.

4 and 5 show the structure of the centrifugal clutch device 20, where 24 and 25 are a driving pulley and a driven pulley attached to the center support shaft 26 via bearings 27 and 28. is rotationally driven by the motor shaft 3 via the belt 21, and the driven pulley 25 is connected to the rotating brush pulley 23 via the belt 22. 29a and 29b are first arms rotatably supported by pins 30 around the side surface of the driving pulley 24; one first arm 29a or 29b;
One end of the swinging side and the other first arm 29b or 2
Springs 31, 31 are interposed between one proximal end of 9a. 32 is the first arm 29a, 29
The first drums 33a and 33b, which are located inside the drive pulley 24 and rotate together with the drive pulley 24, are rotatably attached to the center of the side of the driven pulley 25 by a pin 34 so as to be located inside the first drum 32. A second pivoted arm 33a, 33b
The spring 3 is attached similarly to the first arms 29a and 29b.
5,35 are interposed. A second drum 36 is fixed to the driven pulley 25 concentrically with the center support shaft 26 so that its outer circumference is located between the first drum 32 and the first arms 29a, 29b. 3
7 is a brake drum.

To explain the operation of this centrifugal clutch device 20, when started, the first arms 29a and 29b use the force of the spring 31 to clamp the second drum 36, thereby rotating the driven pulley 25. In steady state, the second arms 33a and 33b resist the force of the spring 35 and move the first drum 3 by centrifugal force.
2, thereby rotating the driven pulley 25. If the rotating brush 6 is locked due to the carpet getting caught, etc., the centrifugal force of the second arms 33a, 33b disappears, and the second
The arms 33a, 33b are pulled back inward by the force of the spring 35, the contact between the first drum 32 and the second arms 33a, 33b is broken, and rotation is no longer transmitted. First arm 29a, 29b
rotates together with the motor 2 while the motor 2 is rotating steadily, and expands outward against the force of the spring 31 due to centrifugal force, and the contact with the outer wall surface of the second drum 36 is cut off. Rotational transmission is also not performed. Therefore, even if the rotating brush 6 locks while the motor 2 is rotating, the centrifugal clutch device 20 completely disconnects the motor 2 and the rotating brush 6, preventing the power transmission belt from breaking as in the conventional case. There is no.

Note that the first and second arms 29a, 29
b, 33a, 33b and the first and second drums 32,
36 is made of a conductive material such as steel such as S45C, and the first arms 29a, 29b and the second drum 36 connect the first switch _SW1 , the first drum 32 and the second arm 33a and 33b constitute a second switch _SW2 . This first,
The electric circuits of the second switches SW ₁ and SW ₂ are connected as shown in FIG. 38 is a light emitting element for displaying operation; 39 and 40 are current limiting resistors;
A parallel circuit of the second switch is interposed in parallel with the power supply circuit of the operation display light emitting element 38. The operation display light emitting element 38 is arranged in the nozzle section 10 as shown in FIG.

With this configuration, the first switch _SW1 is in the make state because the second drum 36 is held between the first arms 29a and 29b at the time of startup.
During normal operation, the second arms 33a, 33b are pressed against the first drum 32, and the second switch _SW2 is in the make state. Furthermore, if the rotating brush 6 is locked while the motor 2 is rotating, the first arms 29a, 2
9b expands outward due to centrifugal force, and the second arm 3
3a and 33b are drawn inwardly by springs 35 and separated from their respective opposing drums. Therefore, at this time, the first and second switches SW ₁ and SW ₂
Both are in a break state. In FIG. 6, the current limiting resistor 39 is larger than the specific resistance of the motor 2, and the current limiting resistor 40 does not need to be very large. It's okay without it. When either the first or second switch SW ₁ or SW ₂ is in the make state, current flows through the circuit formed by these switches, but almost no current flows toward the operation display light emitting element 38. . However, when the power transmission is cut off by the centrifugal clutch device 20, the first
When the second switches SW ₁ and SW ₂ are both in the break state, a current flows through the operation display light emitting element 38 and lights up, so that the operation of the centrifugal clutch device 20 can be clearly displayed.

In the above embodiment, the operation display light emitting element 38 was provided as an alarm means, but the alarm effect is increased by using a sounding body such as a buzzer, and it is possible to use this sounding body and the operation display light emitting element 38 in combination. You can also.

As explained above, according to the present invention, by providing the centrifugal clutch device, it is possible to avoid breakage of the power transmission belt when the rotating brush is locked, and the clutch device can be activated by alarm means such as a light emitting element for operation display. This has the very useful effect of being able to easily and accurately detect motion, and can significantly improve reliability and usability. Also,
Since the operation part of the centrifugal clutch device is also used as a switch, there is no malfunction and the operation of the centrifugal clutch device can be displayed reliably and clearly.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of an embodiment of a vacuum cleaner with a rotating brush according to the present invention, Fig. 2 is a block diagram of the nozzle section shown in Fig. 1, Fig. 3 is a block diagram of a conventional nozzle section, and Fig. 4 is a block diagram of the nozzle section of the conventional nozzle section. 5 and 5 are cross-sectional views showing the main structure of FIG. 2,
FIG. 6 is an electrical wiring diagram of the device shown in FIG. 1... Main body, 2... Motor, 3... Motor shaft, 4... Pulley, 5... Belt, 6... Rotating brush, 7... Bearing, 8... Nozzle body, 9
...Main body, 10...Nozzle part, 11...Back plate, 1
2...Lighting lamp, 13...Bumper, 14...
Buckle, 15... Dust box lid, 16... Selector switch, 17... Grip, 18... Hand switch, 19... Handle, 20... Centrifugal clutch device, 21, 22... Belt, 23... Pulley,
24... Drive side pulley, 25... Driven side pulley,
26... Central support shaft, 27, 28... Bearing, 29a, 29b... First arm, 30...
Pin, 31... Spring, 32... First drum, 3
3a, 33b... second arm, 34... pin,
35... Spring, 36... Second drum, 37...
Brake drum, 38... Light emitting element for operation display.

Claims (1)

[Claims for Utility Model Registration] 1. A centrifugal clutch device is interposed in the power transmission system between the motor and the rotating brush, and this centrifugal clutch device is connected to the drive side of the motor with a belt stretched between it and the motor shaft of the motor. The first drum is coupled to a driven pulley having a belt stretched between the rotating brush and the first drum coupled to the pulley.
a second drum located on the outer periphery of the drum; and a second drum located on the outer periphery of the second drum, supported by the drive pulley, and biased by a spring so as to be in contact with the outer periphery of the second drum. a second arm located inside the first drum, pivotally supported by the driven pulley, and biased by a spring so as to separate from the inner peripheral surface of the first drum.
The first drum and the second arm, and the second drum and the first arm constitute a first and second switch, and are operated by these first and second switches. A vacuum cleaner with a rotating brush in which a controlled alarm means is connected to the power supply circuit. 2. A vacuum cleaner with a rotating brush according to claim 1, in which the alarm means is a light emitting element for indicating operation. 3. The electric vacuum cleaner with a rotating brush according to claim 1, wherein the alarm means is a sounding body such as a buzzer.