JPH062112B2 - Storage battery type vacuum cleaner with self-propelled mechanism - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a vacuum cleaner having a floor-moving type self-propelled mechanism for home or business use.

2. Description of the Related Art A conventional floor moving type vacuum cleaner has a structure as shown in FIG. In FIG. 9, a rear wheel 2 and caster rollers 3 are provided on a cleaner body 1 having a fan motor built therein and having a dust collecting function.
And a hose 6 having a floor nozzle 4 and an extension pipe 5 is connected and fixed to the front of the cleaner body 1.

Problems to be Solved by the Invention In a conventional floor moving type electric vacuum cleaner, the vacuum cleaner body 1 moves while being pulled, but when the vacuum cleaner body 1 is moved, the largest resistance acts on the hand due to inertia. Since it disturbed the smooth operation of the floor nozzle 4, it was easy to get tired and felt very troublesome. In particular, on the carpet, the rolling friction resistance of the rear wheels 2 and the caster rollers 3 as the traveling rollers increases, so that the resistance at the start of movement is 1
Not only is it as large as ~ 1.5 kg, but also the resistance during running is considerably large, which causes a problem that the usability is deteriorated.

The present invention solves the above-mentioned conventional problems by reducing the resistance force at the time of starting the movement of the vacuum cleaner body, allowing the floor nozzle operation to be performed smoothly, and reducing the cleaning machine main body routing force on a carpet or the like. It is an object of the present invention to provide a storage battery type electric vacuum cleaner having a self-propelled mechanism that can be comfortably and comfortably cleaned.

Means for Solving the Problems A storage battery type electric vacuum cleaner having a self-propelled mechanism of the present invention has caster rollers on the bottom front side and a pair of rear wheels on both rear sides, and makes dust-containing air flow to a dust collection chamber. The cleaner body that has a fan motor that filters dust with a filter, a drive mechanism for the rear wheels, and a storage battery that serves as a power source, and a vacuum hose that is installed in the cleaner body and has a hose inserted into it. The rear wheel drive mechanism is configured by linking a differential gear to the output side of the drive motor, and the intake section has a hose connection hole and is swingable. It is composed of an insertion stand provided in the cleaner body and a displacement body that opens and closes the drive switch of the drive motor in conjunction with the swinging motion of the insertion stand. I placed it so that its center of gravity was located It is a thing.

Operation With the above configuration, the center of gravity of the storage battery built into the cleaner body is located approximately in the center between the rear wheels and approximately above the rear wheel axle, with the differential gear interposed between the rear wheels and the drive motor. Since it is arranged, when the hose is pulled to the left and right, the diff gear can smoothly change the direction of the cleaner body, and the weight of the storage battery does not deviate, and the rear wheel can bear the weight most effectively. It is possible to prevent slipping and meandering when self-propelled.

EXAMPLES Examples of the present invention will be described below with reference to the drawings.

11 and 1 in FIGS. 1, 2 and 3.
Reference numeral 2 is an upper body and a lower body that form the outer shell of the cleaner body. The upper body 11 has a dust collecting portion 13 formed above and a battery housing portion 14 formed behind the dust collecting portion 13, and a lid 15 for covering the opening of the dust collecting portion 13 is pivotally supported by a rotary shaft 16 on the upper surface thereof and detachable by a buckle 17. It is held freely. Holder 1 in the dust collecting part 13
A dust collecting bag filter 19 and a secondary filter 20 made of non-woven fabric, which are inserted in No. 8, are housed. Upper body 11
A handle 22 that is rotatable by a rotation shaft 21 is provided at the upper end of the battery storage unit 14, and a storage battery 25 inserted in a battery case 24 that rotates about a support shaft 23 is stored in the battery storage unit 14. There is. The fan motor 26 includes a front support rubber 27 and a rear support rubber 28 for the upper body 11 and the lower body 12.
It is held and fixed by abutting against the dust collecting part 13 via. Two
9 is a bumper made of an elastic rubber material and has an upper body 11
It is held with the lower body 12. Reference numeral 30 denotes an exhaust hole, which is formed on both side surfaces of the upper body 11. Two rear wheels 33 and two caster rollers 34, which are connected to a drive motor 31 via a differential gear 32, are attached to the lower body 12. A transmission gear 35 is fixed to the output shaft of the drive motor 31. 36 is a transmission gear 35
It is a meshing gear that meshes with each other and is formed on the outer ring surface of the differential gear 32. Reference numerals 37 and 38 denote bearings of the differential gear 32. The drive motor 31 is a DC motor and integrally has a reduction gear portion 39 with a reduction ratio of 50 to 100.
The configuration of the differential gear 32 is a differential gear device including four bevel gears as shown in FIG. Is the one that exists.

Further, as shown in FIG. 1 and FIG. 5, a cover plate 41 to which the intake hole packing 40 is fixed is attached to the cover body 15, and a support shaft 42 is provided between the cover body 15 and the cover plate 41. A displacement body 44, which is rotatable in the front and rear of the cleaner body and is biased by the spring body 43 toward the intake hole packing 40, and a hose connection hole 46 are provided at the center, and the displacement body 44 has a substantially central portion in the longitudinal direction. Is configured to be swingable around a support shaft 45 provided in
Moreover, the insertion stand 48 provided with the tight surface 47 with the intake hole packing 40 is attached, and the hose 49 is inserted. The tight surface 47 and the intake hole packing 40 are supported by the support shaft 45.
It has a spherical shape centered at. Further, reference numeral 50 denotes a switch body, which is composed of a micro switch fixed to the inner surface of the lid body 15 so as to face the acting surface 51 provided on the displacement body 44.
The switch body 50 and the displacement body 44 form a first drive motor switch 52. Further, the displacement body 44 is a substantially U-shaped frame body made of synthetic resin as shown in FIG.
Two active surfaces 51 and two switch bodies 50 are symmetrically arranged, and are connected in parallel between the drive motor 31 and the storage battery 25 and electrically coupled.

FIG. 6 is an external view showing the overall structure of a floor moving type electric vacuum cleaner according to the present invention. A power switch 57 and a second drive motor switch 58 for the fan motor 26 are provided at the hose hand portion 56, which is composed of the cleaner body 53, the hose 49, the extension tube 54, and the floor nozzle 55.

FIG. 7 is a partial substantive wiring diagram of a self-propelled circuit of an electric vacuum cleaner having a self-propelled mechanism according to an embodiment of the present invention. In FIG. 7, the + side of the storage battery 25 is the fan motor power switch 5
7, the ON contact a of the fan motor power switch 57 is connected to the fan motor 26 and the first drive motor switch 52, and the fan motor power switch 5
The on-contact b of 7 is connected to the connection point between the first drive motor switch 52 and the drive motor 31 via the second drive motor switch 58, and the connection point between the fan motor 26 and the drive motor 31 is the negative side of the storage battery 25. It is connected to the.

The operation of the above configuration will be described below. When the hose 49 is pulled in the traveling direction with a force larger than the biasing force of the spring body 43, the displacement body 44 is displaced and the switch body 50 composed of a micro switch is pushed and turned on to activate the drive motor 31 and rotate the rear wheel 33. By vacuum cleaner body 5
3 moves forward and the pulling force acting on the hose 49 is applied to the spring body 43.
Rear spring body 43 that has advanced to a position smaller than the urging force of
The displacement body 44 is returned and rotated by the urging of the switch body 50 to turn off the switch body 50, so that the drive motor 31 is stopped and the cleaner main body 53 is also advanced after inertia, and then stopped.

At this time, if the pulling direction of the hose 49 is changed to the left or right in order to change the traveling direction, the cleaner main body 53 causes a difference in rotation speed between the inner ring and the outer ring due to the action of the differential gear 32, and easily rotates in the pulling direction. Further, at this time, even when the first drive motor switch 52 is pulled in the left-right direction, the displacement body 44 is twisted and deformed even when the hose 49 is pulled in the left-right direction, and two switch bodies 50 are provided on the left and right sides. The switch body 50 is activated and the drive motor 31 is activated. Further, since the hose 49 is pivotally supported by the support shaft 45 with respect to the displacement body 44, the switch body 50 does not operate even if the hose 49 is moved in the vertical direction, and the height of the user is different. Displacement body 4 with hose 49 by
Even if the angle in the height direction for pulling 4 is changed, no rotational moment is generated in the displacement body 44 due to the tension in the height direction, and only a single force in the forward and leftward and rightward pulling directions always acts. Therefore, the pulling force is efficiently applied to the displacement body 4
Can be converted into a displacement of 4. Further, during the operation time of the drive motor 31, the pulling force acts on the hose 49 and the switch body 50
Since it is only during operation, it can be controlled to the minimum necessary and the configuration for self-propelling is simple. Further, since the first drive motor switch 52 is connected in parallel with the power switch 57, the hose 49 is only during cleaning (during operation of the fan motor 26).
However, the drive motor 31 does not start even if the hose 49 is pulled by mistake when the fan motor 26 is not in operation, so that the malfunction does not occur.

Further, a power switch 57 and a second drive motor switch 58 are provided at the hose proximal portion 56, and when the power switch 57 is the on contact a, the drive motor 31 is started by the first drive motor switch 52, and the drive motor 31 is switched to the power switch. 57
Is the off contact b, it is activated by the second drive motor switch 58 of the hose proximal portion 56.

Further, as shown in FIG. 1 to FIG. 3, the outer peripheral portion of the traveling roller 33 is covered with a synthetic rubber material having a hardness of about 40 ° to 60 ° on the surface of which concaves and convexes (lateral knurls in this embodiment) are formed. The sliding friction coefficient between the traveling roller 33 and the floor surface is increased to prevent slippage, and the rolling friction coefficient is increased to reduce the difference between the load torques acting on the two wheels.

Further, as shown in FIG. 1 and FIG.
Since the storage battery 25 is disposed substantially above the rotation axis of 3 in the approximate center between the two wheels, the weight of the storage battery 25 is most effectively applied to the traveling roller 33 without being biased, and the traveling roller 33 and the floor surface are separated from each other. Slip resistance and rolling resistance are sufficiently secured, and since the wheels are evenly divided, slipping and meandering can be prevented.

EFFECTS OF THE INVENTION As described above, according to the present invention, the self-propelled mechanism works only by pulling the hose, so that there is no resistance at the time of starting the movement of the cleaner main body, and the floor nozzle and the like can be smoothly operated. However, since the vacuum cleaner body can be pulled around lightly, cleaning can be done comfortably and comfortably, improving the usability and usability.

In addition, a diff gear is placed between the rear wheel and the drive motor to allow the self-propelled function to work, and when the hose is pulled left or right, the diff gear can smoothly change the direction of the cleaner body. Since the storage battery is arranged approximately in the center between the two wheels substantially above the rotation axis of, the rear wheel can be loaded most effectively without the weight of the storage battery deviating and slip and meandering can be prevented. it can.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a vacuum cleaner body having a self-propelled mechanism showing an embodiment of the present invention, FIG. 2 is a side view of the vacuum cleaner body, and FIG. 3 is a cross-sectional view of the vacuum cleaner body. Fig. 4 is an enlarged sectional view of the differential gear, Fig. 5 is a sectional view taken along the line D-D of Fig. 1,
FIG. 6 is an external view showing the overall structure of the electric vacuum cleaner, FIG. 7 is a circuit diagram of the electric vacuum cleaner, FIG. 8 is a rear view of the electric vacuum cleaner showing a storage position of a storage battery, and FIG. It is an external view which shows the whole structure of the conventional vacuum cleaner. 13 ... Dust collector, 14 ... Battery storage, 25 ... Storage battery, 26 ... Fan motor, 31 ... Drive motor, 32
...... Diff gear, 33 ...... traveling roller, 42, 45 ...... support shaft, 43 ...... spring body, 44 ...... displacement body, 49 ...... hose, 50 ...... switch body, 52 ...... first drive motor switch, 53: vacuum cleaner body, 56: hose hand part, 5
7 ... Fan motor power switch, 58 ... Second drive motor switch, 59 ... One-way clutch.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshio Watanabe 7-48-301 Nakayama, Sendai City, Miyagi Prefecture

Claims (1)

[Claims] 1. A fan motor having a caster roller on the front of the bottom and a pair of rear wheels on both sides of the rear, for filtering dust by allowing dust-containing air to flow into a dust collecting chamber, a drive mechanism for the rear wheel, and a power source. A drive mechanism for the rear wheel, comprising: a cleaner body having a built-in storage battery; and an intake portion provided in the cleaner body, into which a hose is inserted, and which serves as an inlet for dust-containing air to the dust collection chamber. Is composed by linking a diff gear to the output side of the drive motor, and the intake part has a hose connection hole, and an insertion stand provided in the cleaner body so that it can swing, and a swinging operation of this insertion stand. And a displacement body that opens and closes the drive switch of the drive motor in conjunction with the storage battery, and the storage battery has a self-propelled mechanism having a self-propelled mechanism arranged such that its center of gravity is located approximately above the center between the rear wheels. Vacuum cleaner.