JPS6220840B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drum-type clothes dryer, and particularly to a drum-type clothes dryer that is intended to have a smaller machine body.

A drum-type clothes dryer has a drum, which is a drying container, supported horizontally within an outer frame, and outside air guided from an air intake port is heated by a heater and blown into the drum, and the laundry stored in the drum is heated. The laundry is dried, and the humid air containing the water that evaporates from the laundry is discharged outside the machine through an exhaust port by a fan.

The drum and fan are rotated by a drive motor. As one of the specific configurations, the fan is directly connected to the shaft of the drive motor, and the fan is placed in a corner of the outer frame, aiming at reducing the depth dimension of the aircraft body. be.

However, in conventional drum-type clothes dryers of this kind, the rotational speed of the fan is equal to the rotational speed of the drive motor, and in order to obtain the required air blowing capacity at that rotational speed, generally the fan is The diameter is made larger than the diameter of the outer shell of the drive motor. Therefore, the drum-type clothes dryer described above has the drawback that even if the depth dimension of the machine body can be reduced, the height and width of the machine body must be increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a drum-type clothes dryer with a compact body by eliminating the drawbacks of the prior art described above.

A feature of the present invention is that a drum, which is a drying container, is horizontally supported within an outer frame, the exterior part except the intake port and the exhaust port is made airtight, and the outside air introduced from the intake port is heated to be heated inside the drum. to dry the laundry stored in the drum, and exhaust the humid air containing moisture evaporated from the laundry to the outside of the machine from the exhaust port by a fan, driving the drum and fan. In a drum-type clothes dryer that is rotated by a drive motor, there is a shaft on one end side of the shaft of the drive motor, which is concentric with the shaft.
a first external gear fixed to an outer shell of the drive motor; a second external gear rotatably supported by a tip of a rotary lever fixed to the shaft and meshing with the first external gear; , a speed increaser including a cylindrical internal gear that is rotatably supported by the shaft portion and meshes with the second external gear; a fan is fixed to the cylindrical internal gear of the speed increaser; The drum-type clothes dryer has a drum driving pulley fixed to the other end of the shaft, and a drum driving belt is stretched between the drum driving pulley and the drum.

Before entering into the description of the embodiments, basic matters related to the present invention will be explained.

Conventionally, in order to increase the air blowing capacity of a fan, the diameter of the fan was increased. This necessitated increasing the height and width of the aircraft, which was an obstacle to miniaturization.

Another method to increase the air blowing capacity is to use a speed increaser to make the rotation speed of the fan higher than the rotation speed of the drive motor, but the speed increaser is usually a two-stage speed increaser. belongs to. Therefore, if this is applied to increase the speed of the fan of a drum-type clothes dryer, the depth of the machine body will not only become longer, but the height will also increase, so it will not be an obstacle to downsizing the machine body. It was something that never changed.

Therefore, by applying the principle of a differential gear mechanism, the present inventors have developed a device that is fixed to one end of the shaft of the drive motor, concentrically with the shaft, and fixed to the outer shell of the drive motor. A P gear related to the first external gear; a T gear related to the second external gear rotatably supported by the tip of a rotary lever fixed to the shaft portion and meshing with the P gear; and an S gear associated with a cylindrical internal gear that is supported by the T gear and meshes with the T gear, and a fan is fixed to the S gear of the speed increaser. To avoid increasing the size of the aircraft and complicating the structure due to additions,
The aim was to downsize the fan and thereby downsize the aircraft.

Hereinafter, the present invention will be explained with reference to Examples.

FIG. 1 is a cross-sectional view of a drum-type clothes dryer according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view showing details of the vicinity of the speed increaser in FIG. 1, and FIG.
FIG. 3 is a sectional view taken along the line AB in FIG. 2; In each figure, the same numbers indicate the same parts.

In FIG. 1, reference numerals 1 and 22 are an outer frame and a back cover, respectively, relating to the exterior part, and a laundry inlet/outlet 2 is provided at the center of the front surface of the outer frame 1. The exterior portion is airtight except for an intake port 23 and an exhaust port 24 (both of which will be described in detail later) that are provided in the back cover 22. Reference numeral 3 denotes a lid that is attached with a butterfly over the laundry intake opening 2, and when it is closed as shown in Fig. 1, the lid is attached to the outer end of the laundry intake opening 2 to maintain airtightness. The inner edge 4 of the lid is in close contact with each other. Reference numeral 5 denotes a drum that is horizontally supported and housed within the outer frame 1, and serves as a drying container for storing laundry 6. 5
5b is provided at the center of the front side plate 5a, and is provided at the shaft of the drum 5, at the input port for the laundry 6 into the drum 5, and at the hot air blowing port. This is also the drum shaft. 5c is a rear side plate of the drum 5, and 5d is an exhaust port for humid air containing moisture evaporated from the laundry 6, which is provided on the rear side plate 5c. Reference numeral 7 denotes a lifter that carries the laundry 6 when the drum 5 rotates, and three to four lifters 7 are fixedly installed on the inner peripheral surface of the drum 5 at equal intervals. Reference numeral 8 denotes a duct that is fixedly installed on the inner front surface of the outer frame 1 and guides hot air to the drum 5, and is made up of duct plates 9 and 10. A heater 30 is housed. Reference numeral 10b denotes a drum bearing part integrally formed with the duct plate 10, and the drum shaft part 5b of the drum 5 is supported by a bearing material 10c (for example, a ring-shaped member made of felt or polyacetal resin) fixed to the inner surface of the drum bearing part. It is a bearing. 1
Reference numeral 1 denotes a hot air outlet that opens along the outside of the laundry 6 intake port 2 . 12 is a bearing plate fastened to the rear side of the outer frame 1; 13 is a circular recess provided in the bearing plate 12, which has a bearing cylinder part 14 in the center; A blowout port 15 for blowing out air from the drum 5 is open. 16 is a drum flange 1 at the center of the rear plate 5c of the drum 5.
This drum shaft 16 is supported by a bearing 18 that is press-fitted into the bearing cylinder 14 and supports the drum 5. 19
is a protective cover for the laundry 6 that protrudes inside the drum 5 and is removably attached to the drum shaft 16, and its entire surface is in the form of a grid. Reference numeral 20 denotes a net-like filter that is detachably attached to the protective cover 19 and is used to catch cloth waste generated from the laundry 6 during the drying operation. 21 is bearing plate 1
2, and the other end is the rear plate 5 of the drum 5.
This is a felt ring for airtightness that is pressed into contact with c. As mentioned above, the reference numeral 22 is the back cover of the exterior part, which is closely fastened to the rear peripheral edge of the outer frame 1. The back cover 22 is provided with an air intake port 23 and an exhaust port 24 facing the air outlet 15. 25 is a drive motor that drives the drum 5 and the fan 26, and an intake port 2 is provided on one side of its shaft.
A fan 26 and a speed increaser 27 (details will be described later) for increasing the speed of the fan 26 are attached to the fan 26, and a drum driving pulley 28 is fixed to the other end. 2
Reference numeral 9 denotes a drum driving belt stretched between the driving pulley 28 and the drum 5. 30
is a heater that serves as a heat source for drying, and this heater 3
0 is housed in the inlet 10a of the hot air duct 8, as described above.

Details of the speed increaser 27 will be explained using FIGS. 2 and 3.

25a indicates the shaft portion of the drive motor 25. 3
1 is an S gear related to a cylindrical internal gear, and the S gear 31 related to this cylindrical internal gear consists of a cylindrical body 31a and a disk portion 31b, and the cylindrical body 31a has an internal gear 31c.
(gear Zs) is cut, and on the other hand, the disc part 31b is
A bearing 32 is press-fitted into the center thereof, and a fan 26 is integrally fixed to the outer periphery thereof. The S gear 31 is configured to rotate integrally with the fan 26 around the shaft portion 25a. 33 is a P gear related to the first external gear, and the P gear 33 related to the first external gear is an external gear 33a.
(number of teeth Zp) and a disk portion 33b, and a bearing 34 is press-fitted into the center of the external gear 33a.
A stopper 35, one end of which is fixed to the outer shell of the drive motor 25, is fixed to the disk portion 33b, and due to the action of this stopper 35, even if the shaft portion 25a rotates, the P gear 33 does not rotate. It's becoming like that. Reference numeral 36 denotes a rotating lever fixed to the shaft portion 25a with a screw 37, and the tip of the rotating lever 36 has a shaft 38 for rotating a T gear 39, which will be described later. 39 is the above-mentioned T gear, and this second
T gear 39 (number of teeth Zt) related to external gear is S gear 31
The internal gear 31c of the P gear 33 and the external gear 33a of the P gear 33
It is disposed so as to mesh with and rotate around a shaft 38. 40 is a bearing press-fitted into the center of the T gear 39; 41 is the S gear 31; P
This is a C-shaped retaining ring that prevents the gear 33 from moving in the thrust direction.

The operation of the drum-type clothes dryer configured in this way will be explained.

First, in drying the laundry 6, the laundry 6 is put into the drum 5, the lid 3 is closed, and the drive motor 25 and the heater 30 are energized. The drum 5 rotates at low speed to agitate the laundry 6.

At the same time, the fan 26 rotates at increased speed by the speed increaser 27. That is, when the shaft portion 25a of the drive motor 25 rotates, this shaft portion 25a rotates.
A rotary lever 36 fixed to a also rotates together with the shaft portion 25a. As the rotary lever 36 rotates, the T gear 39 disposed at the tip of the rotary lever 36 rotates the shaft portion 25a together with the rotary lever 36 along the engagement with the external gear 33a of the P gear 33. It revolves around the center and rotates around the axis 38. The revolution and rotation of the T gear 39 causes the internal gear 31c of the S gear 31 to mesh with the T gear 39.
The S gear 31 is rotated. The rate of speed increase is (1+Zp/Zs) times the rotation speed of the shaft portion 25a of the drive motor 25, and the S gear 31 and the fan 26 rotate. for example,
If Zs = 52 sheets, Zp = 20 sheets, Zt = 16 sheets, the rotation speed of the shaft portion 25a of the drive motor 25 is 1300 rpm.
When this is the case, the rotational speed of the S gear 31 and the fan 26 is 1800 rpm.

As the speed of the fan 26 is increased in this manner, outside air is guided into the outer frame 1 from the air intake port 23 of the back cover 22, enters the hot air duct 8 from the air intake port 10a, and is heated by the heater 30. It becomes hot air. Then, the hot air is blown into the drum 5 from the hot air outlet 11, and the laundry 6 is dried in the drum 5.
The air contains moisture evaporated from the air, becomes humid air, and is discharged from the exhaust port 24 to the outside of the outer frame 1. The laundry 6 is dried through the above-described operations.

According to the embodiment described above, in order to increase the capacity of the fan 26, a method is adopted to increase the rotational speed of the fan 26, and when increasing the speed of the fan 26 with the speed increaser 27, the speed increaser By installing the fan 24 on the shaft of the drive motor 25 and configuring the fan 26 to rotate on the shaft of the drive motor 25, for example, the number of teeth of each gear constituting the speed increaser 27 can be adjusted as described above. As shown, Zs = 52 pieces, Zp = 20 pieces,
If Zt = 16 pieces, the outer diameter of the fan 26 can be reduced by about 30%, which has the effect of greatly contributing to thinning and downsizing the fuselage, as well as reducing cost and installation space due to downsizing. There is also.

As described in detail above, according to the present invention, it is possible to provide a drum-type clothes dryer with a compact body.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a drum-type clothes dryer according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view showing details of the vicinity of the speed increaser in FIG. 1, and FIG.
FIG. 3 is a sectional view taken along the line AB in FIG. 2; 1... Outer frame, 5... Drum, 6... Laundry, 2
2...Back cover, 23...Intake port, 24...Exhaust port,
25... Drive motor, 26... Fan, 27...
...speed increaser, 31...S gear, 33...P gear, 3
9...T gear.

Claims (1)

[Claims] 1 A drum, which is a drying container, is horizontally supported within an outer frame, the exterior part excluding the intake port and the exhaust port is made airtight, and the outside air led from the intake port is heated and blown into the drum. The laundry stored in the drum is dried, the humid air containing moisture evaporated from the laundry is discharged outside the machine from the exhaust port by a fan, and the drum and fan are driven by a driving motor. In a rotating drum-type clothes dryer, a first external gear is provided on one end side of a shaft portion of a drive motor, the first external gear is concentric with the shaft portion and is fixed to an outer shell portion of the drive motor; a second external gear rotatably supported by the tip of a rotary lever fixed to the shaft and meshing with the first external gear; and a cylinder rotatably supported by the shaft and meshing with the second external gear. A speed increaser consisting of a cylindrical internal gear is provided, a fan is fixed to the cylindrical internal gear of this speed increaser, a drum driving pulley is fixed to the other end side of the shaft portion, and a drum driving pulley is fixed to the other end of the shaft portion. A drum-type clothes dryer characterized by a drum drive belt running between a pulley and a drum.