JPS58103500A - Drive apparatus of garment dryer - 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 rotary drum type clothes dryer that uses a blower fan to guide hot air into a rotating drum to dry clothes, and more particularly to a rotary drum type clothes dryer that uses a blower fan to guide hot air into a rotating drum to dry clothes. Concerning improvements to drive devices.

Conventionally, in the configuration of a drive device for this type of clothes dryer, a drum transmission pulley that drives the drum once per rotation and a fan transmission pulley that rotates the blower fan are each separately fixed to the shaft of a drive motor. Therefore, there is a need for a management system for the eccentricity of both pulleys, or for variations in the parallelism of the belt position during assembly due to variations in the attachment of both pulleys to the shaft, and a system for managing the eccentricity of both pulleys to the shaft of the drive motor. Since fixing screws are required for each fixing screw, the number of parts and assembly man-hours increase, resulting in high costs. Furthermore, since it is necessary to provide two parts, a drum transmission pulley and a fan transmission pulley, not only is the cost high, but when moving to an area where the power supply frequency is different, the two parts must be adjusted to the frequency of the new area. There were many inconveniences, such as having to change the belt to fit the belt, requiring many parts and man-hours, and requiring high purity such as ensuring the parallelism of the belt.

In addition, there are other conventionally known devices of this type in which the drum transmission, pulley and fan transmission pulley are integrally constructed from a single material. A steel material is used, but a general feature of this type of drive device is that a four-pole induction motor (S
ol(z: 1500R,P,M,/60Hz: 1
(800R, P, M, ) (7) The high rotational speed is normally transmitted to the blower fan at around 200°R,P,M, with various rotational speeds depending on the size of the blower fan, while the rotational speed is transmitted to the rotating drum at the appropriate speed. The centrifugal force caused by the rotation of the rotating drum causes the clothing to stick to the peripheral wall of the rotating drum without rotating, but to perform a tampling motion. s s R, P, M, the speed reduction ratio is extremely high because it is transmitted forward and backward at a single step reduction. Accordingly, the contact angle with the belt on the drum transmission pulley side is very small and the slip ratio is also large. As a result, in devices that employ synthetic resin as a single material in conventionally known devices of this type, heat is generated due to slipping with the belt on the drum pulley side, and the disadvantage of synthetic resin materials is poor thermal conductivity. Since heat is accumulated on the drum pulley side, there are problems such as poor durability, wear, and destruction due to creep phenomenon. Furthermore, if the drum transmission pulley and fan transmission pulley are made of steel, the diameter and surface roughness of the drum transmission pulley and fan transmission pulley need to be precisely cut. There was a flaw that it lacked.

The present invention overcomes the disadvantages of the prior art described above and provides a useful clothes dryer drive system.

An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, reference numeral 1 denotes the main body of the clothes dryer, and reference numeral 2 denotes a rotary drum provided within the main body that accommodates items to be dried, which is rotatably supported. 3 is a driving motor.This driving motor 3
On the motor shaft 3IL, a drum transmission pulley 4 made of a steel material or the like that rotates the drum 2 for one rotation is integrally formed by insert molding with a fan transmission pulley 6 made of a synthetic resin material or the like that rotationally drives the blower fan 6. tE
.

Of both pulleys 4.6, only the drum drive pulley 4 is fixed with fixing screws 7. A heater 8 is provided below the front surface of the rotating drum 2, and the heater 8 is fixedly held by an insulating member 9. An in-drum filter 10 for collecting cotton dust from clothing is installed at the center of the rear surface of the rotating drum 2, and an exhaust log guide 11 is provided at the rear surface of the main body 1. Reference numeral 12 denotes a door provided in the main body 1 so as to be openable and closable so as to cover the clothes slot.

The rotation of the driving motor 3 is transmitted from the drum transmission pulley 4 to the rotating drum 2 via the drum belt 13 to rotate it, while the fan transmission pulley 6 is directly connected to the fan belt 14 and the fan 6. The air is transmitted to the blower fan 6 via the fixed fan pulley 16 and rotated. 16 is an idler pulley for applying tension to the drum belt 13, and is supported by an idler spring 17. Reference numeral 18 denotes a louver for intake air which is opened in the main body 1.

The operation of the dryer with the above configuration will be described. Outside air is taken in through the looper 18 etc. opened in the main body 1, the air passes through the heater 8, becomes hot air, and is sent into the rotating drum 2. Upon contact with the material to be dried 19, the hot air exchanges heat and becomes moist air, which passes through the filter 10 in the drum and exits the exhaust log guide 1.
The material to be dried 19 is dried by discharging the air from the air tank 1 into the atmosphere.

Next, to explain in detail the driving device which is the main part of the embodiment, the drum transmission pulley 4 is made of metal material such as steel.
A groove 4& for suspending the drum belt 13 is provided, a screw hole 4b for a fixing screw 7 is provided in the center of the body, and a part of the material of the fan transmission pulley 6 flows in to form a strong connection. Recesses 4c are provided at several locations. On the other hand, the fan transmission pulley 6 is made of a synthetic resin material, has a groove 6a for suspending the fan belt 14, has an outer shape so as to cover the end of the drum transmission boot IJ-4, and is further provided with a motor shirt. A built-up portion 6b is provided so as to be smaller in diameter than the motor shaft 3& so as to abut on the end of the motor shaft 3a and serve as a stopper guide. By integrally forming the drum transmission pulley 4 with the fan transmission pulley 6 by insert molding, the material of the fan transmission pulley 6 flows into the concave part 4C of the drum transmission pulley 4, and the convex part 6C is formed, thereby forming the drum transmission pulley. 4 and the fan transmission pulley 6 are firmly coupled to each other. Only the drum transmission pulley 4 is fitted onto the motor shaft 3a, and the motor shaft 3 &
The motor shaft 31L and the drum transmission pulley 4 are directly connected and fixed to the cutter 10% cutter portion 3b provided in the cutter. This configuration was made possible because when the dryer is operating, there is a large difference in rotational speed between the rotating drum and the blowing fan when transmitting the rotational force of the drive motor to the rotating drum and the blowing fan. In this case, the drive side in the transmission to the rotating drum, that is, the drum transmission pulley 4, is subjected to a heavy burden, while the drive vibration in the transmission to the blower fan, that is, the fan transmission pulley 6, is subjected to a light burden. Therefore, both pulleys are made of different materials. Focusing on rational coupling, the drum transmission pulley that drives the one-rotation drum according to the embodiment is made of a metal material such as steel, and the fan transmission pulley that drives the blower fan is made of synthetic resin.
Both pulleys are integrated by insert molding.

By directly connecting and fixing only the drum transmission pulley to the driving motor shaft, the following effects can be obtained.

That is, (1) Fixation to the motor shaft is achieved by fixing the transmission pulley side made of metal such as steel in one place, and the installation work can be done very efficiently.

(2) Since the drum transmission pulley side of the fan transmission pulley, which has a high rotational drive torque, is fitted and fixed onto the motor shaft, the drum transmission pulley, which is made of a metal material such as steel on the high load side, can be firmly fixed and The fan transmission pulley held in the drum transmission body on the light duty side can also be securely fixed through insert molding of both.

(3) Since the drum transmission pulley is integrally molded with the fan transmission pulley, the amount of eccentricity of both pulleys with respect to the motor shaft is extremely small, and a highly accurate product with a uniform distance between both pulleys can be obtained, so the drum belt and fan belt The relative position of the belt is ensured correctly, and both belts are prevented from swinging out.

It prevents uneven contact and increases durability.

(4) Since the drum transmission pulley and fan transmission pulley are integrated, it is easy to rearrange parts for frequency conversion due to moving, and it is possible to prevent mistakes in parts caused by combining one pulley.

No skill is required for the rearrangement work.

(6) Good durability can be achieved by using a metal material such as steel on the drum transmission pulley side, which has a high load, and a resin material on the fan transmission pulley side, which has a relatively light load. It will be done.

(6) By integrating the drum belt and the fan belt, the distance between the drum belt and the fan belt can be maintained uniformly, reducing management costs and providing stable quality.

(7) The motor shaft can be shortened and manufactured at low cost. A clothes dryer drive device of stable quality can be provided without requiring any skill in the operation.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a clothes dryer according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of its driving device. 1...Dryer body, 2...Rotating drum, 3...Drive motor, 3...Motor shaft. 4...Drum transmission pulley, 6...Blower fan, 6...Fan transmission pulley, 7...
...Fixing hiss. 13...Drum belt, 14...Fan belt, 16...Fan pulley. Name of agent: Patent attorney Toshio Nakao is 3) 1 person Figure 11 Figure 2

Claims (1)

[Claims] A rotary drum is rotatably supported in the main body of the device, and a blower fan is provided for guiding hot air from a heating element into the rotary drum, and a motor for driving the rotary drum and the blower fan via respective belts. A drum transmission pulley made of a metal material that rotationally drives the rotary drum is integrally formed by insert molding with a fan transmission pulley made of a resin material that rotationally drives the blower fan Lh4, Drive device for motor machines.