JPH0357799B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for a rotary drum type clothes dryer, in which a blower fan and an axial gap type copper motor are respectively disposed on the rotation center axis of the rotary drum and as a driving power source. , and a reduction gear device driven by a rotating drum is disposed in a space sandwiched between a wind layer fan and an exhaust filter on the rear surface of the rotating drum,
This is an attempt to dramatically save space in the depth dimension of the dryer and simplify the mechanism.

The drive mechanism of a conventional rotary drum type clothes dryer is that a circumferential gap type induction motor is installed as a drive source in the outer casing, and the induction motor is connected to the rotating drum via a pulley and belt to blow air. The most common method was to rotate the fan. In such a conventional configuration, the drive motor and the idler pulley that maintains the tension of the belt must be attached to the bottom of the outer casing, so the outer casing has no choice but to be large in the height direction. As a result, a large dead space was created between the rotating drum and the outer casing. Also, regarding the depth dimension, space was required for arranging bearings, pulleys, etc. for the blower fan at the rear of the blower fan.

The present invention solves the above-mentioned conventional problems, and embodiments thereof will be described below. In the figure, 1 is an outer casing, 2 is a rotating drum (hereinafter simply referred to as a drum) contained in the outer casing 1, 3 is a filter installed inside the rear side of the drum 2, and 4 is a rear component of the above-mentioned 1. An axial gap type induction motor M (hereinafter simply referred to as motor M), which is a rotational drive source, is installed approximately in the center of this back plate 4 and on the rotational center line of the drum 2.

The motor M consists of a stator 5 and a rotor 6, and a ball bearing 7 provided on the stator 5.
It is rotatably held by. Reference numeral 8 denotes a blower fan, which, as shown, has a shape that includes a motor M, and is attached to the roller 6. 9
is a fan casing, which houses the air blower 8.
The air sucked in by the rotation of the blower fan 8 is sent to the heater 1
0, passes through the drum 2 and the filter 3, and is discharged through the discharge port 11 as shown by a.

12 is a rotor shaft, and the left shaft end in FIGS. 1 and 2 is connected to the first small gear 13 which is the input side of the reduction gear mechanism G. 14 is the first small gear 13
The second large gear meshing with 15 is the second large gear 14
The third small gear is coaxial and rotates at the same time, and meshes with the fourth large gear 16. 17 is an output shaft, which is attached coaxially with the fourth large gear 16. A gear box 18 is attached to the fan casing 9. Reference numeral 19 denotes a drum 2 rotation bearing to which the driving force of the output shaft 17 is transmitted by fitting through each hole 19'. Dynamic bearing material 2
0, the drum 2 is rotatably attached to the boss portion 18' of the gear box 18, and the drum 2 is rotationally driven.

21 is a vibration-proof rubber that attaches the motor M to the back plate 4, and 22 to 25 are mounting screws. 26 is a felt which is a sealing member. 27,2
Numeral 8 denotes a large number of ventilation holes, which are provided around the entire circumference as shown in FIG.

The effects will be explained below. Gear box 18
The arrangement of the first to fourth gears 13, 14, 15, and 16 in the gearbox is shown in FIG.
The No. 4 and No. 4 large gears 14 and 16 are made of plastic, and the No. 2 large gear 14 is made of plastic.
The pieces are equally spaced and squarely interlocked to provide strength.

The reduction gear mechanism G of this embodiment is designed to have a reduction ratio of approximately 1/30. If the same reduction ratio were to be designed using a planetary gear, reducing the speed to 1/30 with a single planetary gear would make the external diameter of the internal gear too large, so a two-speed planetary gear would have to be used. figure,
The depth dimension (thickness dimension) becomes large.

In this example, the thickness of the spur gear is approximately half that of a planetary gear due to the coaxial two-stage reduction, and the gear box 1
8 is formed into a substantially equilateral triangle corresponding to the three No. 2 large gears 14 as shown in FIG. 3, a space b is created on each side of the triangle, and this space is used as a ventilation passage.

Further, the motor M is provided in a position included in the blower fan 8, thereby saving space in the depth dimension of drying. Furthermore, the entire gear box 18 is located in a space sandwiched between the blower fan 8 and the filter 3 to save space in terms of depth.

As described above, according to the present invention, it is possible to rationally reduce the height, width, and depth dimensions of the outer casing, resulting in a novel design that saves space, makes it more compact, and simplifies the mechanism. A driving device for a clothes dryer can be provided.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a clothes dryer according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of its driving device, and FIG.
The figure is a front view of the reduction gear mechanism. DESCRIPTION OF SYMBOLS 1...Outer casing, 2...Rotating drum, 3...Filter, 4...Back plate, M...Axial gap type induction motor, 8...Blower fan, 10...Heater, G...
Reduction gear mechanism.

Claims (1)

[Claims] 1. An axial gap type induction motor is installed approximately in the center of the back component of the outer casing that houses the rotating drum, and the motor is housed in the rotor or rotor shaft of this motor, and a blower fan is attached to the rotor shaft end. is connected to the input side of a reduction gear mechanism, and this reduction gear mechanism is located in a space sandwiched between the blower fan and the exhaust filter on the rear surface of the rotating drum, and the reduction gear mechanism is connected to the first small gear. A plurality of second large gears are arranged equally around the second large gear, and a third small gear coaxial with the second large gear meshes with a fourth large gear on the output shaft coaxial with the input shaft. The driving device for a clothes dryer has a mechanism for decelerating the gears at the same time, a gear box for storing the gear group has a polygonal shape corresponding to the arrangement of the second large gear, and a space around the gear box is used as a ventilation passage.