KR20150022842A - Washing machine driver - Google Patents

Abstract

The washing machine includes an electric motor, a washing shaft 51, a dehydrating and shrinking sleeve 52 fitted on the washing shaft 51, and a gear reduction mechanism. The washing shaft 51 is disposed inside the motor rotor 23 of the electric motor A washing machine driver is disclosed which is coaxially mounted and fixed to an output gear (332) of a gear reduction mechanism, and an input gear shaft (31) of a gear reduction mechanism is inserted into an axial hole of a motor rotor (23). Since the input gear shaft 31 of the gear reduction mechanism is inserted into the shaft hole of the motor rotor 23, the motor rotor functions as a gear carrier of the gear reduction mechanism and effectively combines the gear reduction mechanism and the electric motor, The size of the driver in the axial direction can be reduced, and the structure of the washing machine driver can be made simple and compact, thereby saving space. Further, since the transmission ratio of the gear reduction mechanism has a wide range, a large reduction gear output can be obtained.

Description

Washer Driver {WASHING MACHINE DRIVER}

The present application claims priority to Chinese patent application No. 201210165853.1 entitled "WASHING MACHINE DRIVER ", filed on May 24, 2012, with the Chinese Intellectual Property Office, The contents of which are incorporated herein by reference.

The technical field of the present application relates to a driver, and more particularly to a driver for a washing machine.

Washing machines are common household electrical appliances used in everyday life and have two main operating states: washing condition and spinning condition.

Conventional drive units of existing washing machines mainly consist of an electric motor and a speed reduction clutch mechanism. A general electric motor has a high rotation speed and the rotational speed transmitted from the electric motor to the reduction clutch is reduced by the primary pulley in order to obtain an appropriate rotation speed for the laundry condition. A general deceleration clutch mechanism mainly includes a single-stage planetary deceleration clutch mechanism, a pulley type reduction clutch mechanism, and an electric motor direct drive clutch mechanism. However, the single-stage planetary deceleration clutch mechanism can not output the speed at a large reduction ratio, thereby lowering the efficiency of washing, and giving a high requirement to the electric motor, thereby increasing the cost. When a multi-stage planetary reduction clutch mechanism is employed, the cost is increased, and the mechanism is complicated, not compact, and unstable. The pulley type reduction clutch mechanism is expensive, the belt transmission ratio is inaccurate, the life of the belt is short, and the efficiency of washing is low. Further, the driver formed of the electric motor and the reduction clutch mechanism has a large axial dimension, and the structure is not compact.

The other reduction clutch of the prior art uses a direct drive electric motor instead of the original indirect drive electric motor. However, most of these types of drive motors are brushless DC motors, which require a control unit to realize rotational control and other functions, the control unit is expensive, and this kind of driver has an axial dimension Is not suitable for long-term development.

Therefore, one of the technical challenges that the present state of the art is to solve is to design a washing machine driver that has a small axial dimension and a compact structure, which saves space.

It is an object of the present invention to provide a washing machine driver which is small in axial dimension and compact in structure and can save space.

In order to solve the above technical problem, there is provided a washing machine driver according to the present application, which comprises an electric motor, a wash shaft, a spin tube fitted on the washing shaft, The washing shafts are coaxially mounted in the motor rotor of the electric motor and fixedly connected to the output gear of the gear reduction mechanism. The gear reduction mechanism includes an input gear shaft inserted into the shaft hole of the motor rotor .

Preferably, the gear reduction mechanism includes a first gear, a second gear, an intermediate gear, and an output gear, wherein the first gear and the second gear are respectively fixed to two ends of the input gear shaft, And the second gear meshes with the output gear, the intermediate gear is fitted onto the spin tube, and the output gear is fixedly connected to the washing shaft.

Preferably, the gear reduction mechanism comprises a dual gear, an intermediate gear and an output gear, the dual gear being fitted on the input gear shaft, the intermediate gear and the output gear being connected to a first stage gear And the second gear are engaged with each other, the intermediate gear is fitted on the spin tube, and the output gear is fixedly connected to the washing shaft.

Preferably, the intermediate gear is an external gear or an internal gear ring.

Preferably, the output gear is an external gear or an internal gear ring.

Preferably, the driver further comprises a clutch device, wherein the clutch device is disposed between the spin tube and the motor rotor to realize a switching between the laundry state and the rotating state.

Preferably, the clutch toothed disc of the clutch device is connected to the spin tube via a splined sleeve, and the clutch tooth forming disc engages the spline sleeve and axially slidably engages the spline sleeve .

Preferably, in the laundered state, the clutch tooth forming disc engages the top cover of the electric motor, and in the rotated state, the clutch tooth forming disc engages the motor rotor.

Preferably, in the laundered state, the clutch tooth forming disk is not fixed, and in the rotating state, the clutch tooth forming disk engages the motor rotor.

Preferably, the clutch device is an electromagnetic clutch device or a mechanical clutch device.

In comparison with the background art, the driver of the impeller type washing machine according to the present application includes an electric motor, a washing shaft, a spin tube fitted on the washing shaft, and a gear reduction mechanism. And the gear reduction mechanism includes an input gear shaft inserted into the shaft hole of the motor rotor. The input gear shaft of the gear reduction mechanism is inserted into the shaft hole of the motor rotor so that the motor rotor functions as a gear carrier of the gear reduction mechanism so as to effectively integrate the gear reduction mechanism and the electric motor, By reducing the direction dimension, the washing machine driver has a simple and compact structure, resulting in space saving. Furthermore, the gear reduction mechanism has a wide range of transmission ratio, thereby obtaining an output at a high reduction ratio.

1 is a front view of a washing machine driver according to an embodiment of the present application;
Figure 2 is a cross-sectional view of the washing machine driver of Figure 1 taken along line AA,
Figure 3 is an exploded view of the washing machine driver of Figure 1,
4 is a schematic view showing a transmission of a washing machine driver according to a first embodiment of the present application,
5 is a schematic view showing a transmission of a washing machine driver according to a second embodiment of the present application,
6 is a schematic view showing a transmission of a washing machine driver according to a third embodiment of the present application,
7 is a schematic view showing a transmission of a washing machine driver according to a fourth embodiment of the present application;
8 is a schematic view showing a transmission of a washing machine driver according to a fifth embodiment of the present application,
9 is a schematic view showing a transmission of a washing machine driver according to a sixth embodiment of the present application,
10 is a schematic view showing a transmission of a washing machine driver according to a seventh embodiment of the present application.

It is an object of the present invention to provide a washing machine driver which is small in axial dimension and compact in structure and can save space.

BRIEF DESCRIPTION OF THE DRAWINGS For a better understanding of the technical solutions of the present application, those skilled in the art will now explain the present application in detail, with reference to the drawings and the following detailed description.

It should be noted that the positional terms associated with this specification, such as upper and lower, are defined by the positional relationship of the positions and portions of the parts of FIGS. 1 to 10 and are intended merely to provide a clear and simple description of the technical solution do. It is to be understood that the terminology used herein should not be construed as limiting the scope of the claimed application.

Please refer to Figs. 1 to 3. FIG. 1 is a front view of a washing machine driver according to one embodiment of the present application, FIG. 2 is a cross-sectional view of the washing machine driver of FIG. 1 taken along line A-A, and FIG. 3 is an exploded view of the washing machine driver of FIG.

In one embodiment, the washing machine driver according to the present application comprises an electric motor. The electric motor includes a motor housing 21, a motor stator 22, and a motor rotor 23. The motor stator 22 is provided in the motor housing 21 and the motor rotor 23 is provided coaxially in the motor stator 22 and the motor rotor 23 is provided with shaft holes. An upper end cover 24 and a lower end cover 25 are provided above and below the electric motor, respectively. The motor housing 21, the motor stator 22, the upper end cover 24 and the lower end cover 25 may be fixedly connected by bolts.

The washing shaft 51 of the washing machine is coaxially mounted in the motor rotor 23 and a rotor oil-containing bearing 81 is provided between the washing shaft 51 and the motor rotor 23. The washing shaft 51 limits the motor rotor 23 in the radial direction and the relative rotation between the washing shaft 51 and the motor rotor 23 is realized by the rotor oil containing bearing 81. [

The spin tube 52 of the washing machine is fitted on the washing shaft 51 and a washing shaft oil-containing bearing 82 for realizing the relative rotation between the spin tube 52 and the washing shaft 51 is provided do.

The washing machine driver further includes a gear reduction mechanism. The gear reduction mechanism includes an input gear shaft 31, a first gear 321, a second gear 322, an intermediate gear 331, and an output gear 332. The input gear shaft 31 is inserted into the shaft hole of the motor rotor 23 and an oil-containing bearing is provided between the input gear shaft 31 and the motor rotor 23 to realize relative rotation therebetween. The first gear 321 and the second gear 322 are fixed to two ends of the input gear shaft 31, respectively. The first gear 321 meshes with the intermediate gear 331 and the second gear 322 meshes with the output gear 332. [

The intermediate gear 331 is fitted on the spin tube 52. The output gear 332 is fixedly connected to the washing shaft 51 and this fixed connection can be obtained by a straight pin 84. [ A distance ring 72 is provided between the washing shaft 51 and the output gear 332 and two ends of the motor rotor 23 are each provided with a flat bearing, The axial movement of the motor rotor 23 by the bearing can be restricted.

It should be noted that the motor rotor may have a plurality of shaft holes, i.e., a plurality of input gear shafts, and the first and second gears cooperating with the plurality of input gear shafts may be inserted into the motor rotor. Due to the large number of input gear shafts, the combination of the electric motor and the gear reduction mechanism can operate more stably and has a long operating life.

A mounting plate 11 is fixedly provided on the top cover 24 of the electric motor and the mounting plate 11 and the top cover 24 may be fixedly connected by bolts. The driver may be mounted in the washing machine via the mounting plate 11.

Reference is now made to Fig. 4, which is a schematic diagram illustrating the transmission of one embodiment of a washing machine driver. The electric motor drives and rotates the motor rotor 23 and at the same time is fixedly connected to the input gear shaft 31 connected to the motor rotor 23 and the input gear shaft 31 The first gear 321 and the second gear 322 are driven to rotate. Since the first gear 321 meshes with the intermediate gear 331 and there is a difference between the number of teeth of the first gear 321 and the number of teeth of the intermediate gear 331, And is driven to rotate around its own axis. The second gear 322 meshes with the output gear 332 so that the output gear 332 is rotationally driven so that the washing shaft 51 fixedly connected to the output gear 332 is further rotationally driven. There is a difference in the number of teeth between the first gear 321, the second gear 322, the intermediate gear 331 and the output gear 332, The rotation speed difference will be generated so that the washing shaft 51 will be driven to output at a low speed. Since the intermediate gear 331 is fitted on the spin tube 52 and is in the non-fixed state, the spin tube 52 also outputs a low speed at a specific speed ratio, and the washing shaft 51 is also rotated at low speed Output. Therefore, in the laundry state, the electric motor can rotate at a high speed, and the washing shaft 51 can be output at a low speed through the gear reduction mechanism, thereby increasing the utilization efficiency of the electric motor, power output.

It is to be noted that the washing shaft 51 and the spin tube 52 may all output in the same rotation direction at a low speed or may output in the opposite rotation direction. Whether or not the rotating directions of the washing shaft 51 and the spin tube 52 are the same or not depends on whether the value of the difference in the number of teeth of the gear reduction mechanism is positive or negative. In a practical application, the relationship of the difference in the number of teeth of the gear reduction mechanism can be determined as desired.

Note that in this embodiment, the intermediate gear 331 and the output gear 332 are both internal gearing.

Referring to FIG. 5, in the second embodiment, the gear reduction mechanism includes a dual gear 32, an intermediate gear 331, and an output gear 332. The dual gear 32 is fitted on the input gear shaft 31 'and the intermediate gear 331 and the output gear 332 are respectively engaged with the first gear 321 and the second gear 321 of the dual gear 32 322). The intermediate gear 331 is fitted on the spin tube 52 and the output gear 332 is fixedly connected to the washing shaft 51. The intermediate gear 331 and the output gear 332 are both external gearing.

In the second embodiment, the input gear shaft 31 'is fixedly connected to the motor rotor 23, and the dual gear 32 and the input gear shaft 31' may rotate with respect to each other. The low speed output of the washing shaft 51 is transmitted to the first gear 321 of the dual gear 32 and the second gear 321 of the dual gear 32 when the motor rotor 23 is rotationally driven, The intermediate gear 331, and the output gear 332 of the second gear 32 of the first planetary gear mechanism.

Of course, the low speed output of the washing shaft 51 is obtained by rotatably connecting the input gear shaft 31 'to the motor rotor 23 and fixing the dual gear 32 to the input gear shaft 31' It may be.

In the second embodiment or the first embodiment, the intermediate gear 331 may be an external gear or an internal gear ring, and the output gear 332 may be an external gear or an internal gear ring, whereby the gear- It may have several other embodiments.

It should be noted that, in various embodiments, structures or members having the same or equivalent functions are denoted by the same reference numerals in the drawings.

Referring to Figure 6, in the third embodiment, the input gear shaft 31 is rotatably inserted in the motor rotor 23, and the first gear 321 and the second gear 322 are connected to the input gear shaft 31 As shown in Fig. The intermediate gear 331 and the output gear 332 are both external gears.

Referring to Fig. 7, in the fourth embodiment, the input gear shaft 31 is rotatably inserted in the motor rotor 23, and the first gear 321 and the second gear 322 are connected to the input gear shaft 31 As shown in Fig. The intermediate gear 331 is an internal gear ring, and the output gear 332 is an external gear.

8, the input gear shaft 31 is rotatably inserted in the motor rotor 23, and the first gear 321 and the second gear 322 are rotatably inserted into the input gear shaft 31 As shown in Fig. The intermediate gear 331 is an external gear and the output gear 332 is an internal gear ring.

9, in the sixth embodiment, the input gear shaft 31 'is fixedly connected to the motor rotor 23, and the dual gear 32 and the input gear shaft 31' And the intermediate gear 331 and the output gear 332 are engaged with the first gear 321 and the second gear 322 of the dual gear 32, respectively. The intermediate gear 331 is an internal gear ring, and the output gear 332 is an external gear.

According to the seventh embodiment shown in Fig. 10, since the gears at the two ends of the dual gear 32 have different tooth counts, the first gear 321 'of the dual gear 32 is connected to the output gear 332, and the second gear 322 'can engage with the intermediate gear 331. The intermediate gear 331 is still an internal gear ring, and the output gear 332 is still an external gear.

The principle of the transmission in some of the above-described embodiments at the time of operation is the same as that in the first embodiment, and will not be described here.

It should be noted that, in addition to some of the above embodiments, the gear reduction mechanism may also have other embodiments as long as differential reduction can be obtained and the output mechanism and the motor rotor can produce rotational speed differential.

Further improvements to the washing machine driver may be made.

The washing machine driver may further comprise a clutch device (4). The clutch device is provided between the spin tube 52 and the motor rotor 23, which may realize switching between the laundry state and the rotating state.

The clutch device 4 may be an electromagnetic clutch device or a mechanical clutch device. Hereinafter, the electromagnetic clutch device will be described as an example.

The electromagnetic clutch device includes a clutch cover plate 41, a clutch fixing plate 42, a clutch tooth forming disc 43, and a coil holder 44. The clutch holder plate 44 is disposed in the annular groove of the clutch fixing plate 42 and the clutch cover plate 41 is provided on the coil holder 44. The clutch teeth forming disc 43 is fixed to the clutch fixing plate 42, As shown in Fig. The clutch cover plate 41, the clutch fixing plate 42 and the coil holder 44 are first connected to each other and then fixedly connected to the upper cover 24, and this fixed connection may be achieved by bolts. A pressure spring 45 may be additionally provided on the clutch tooth forming disc 43. [

The clutch tooth forming disk 43 is fitted on the spin tube via the spline sleeve 71 and the clutch tooth forming disk 43 is engaged with the spline sleeve 71 and is spline sleeve 71 slidably in the axial direction. Lt; / RTI > It should be noted that the clutch tooth forming disc 43 and the spline sleeve 71 always engage in any operating condition and can not rotate relative to each other. The clutch tooth forming disk 43 and the spline sleeve 71 are disposed at the upper end of the first internal gear ring 331.

When the electromagnetic clutch device is supplied with electric power to form a magnetic field, the clutch tooth forming disk 43 slides axially upward along the outer spline of the spline sleeve 71 against the spring force of the pressure spring 45 Whereby the clutch tooth forming disk 43 is separated from the motor rotor 23. [ At the same time, when power is supplied to the electric motor, a low speed output of the washing shaft 51 is obtained through the gear reduction mechanism, thereby realizing the washing function.

It should be noted that the common output and the combined power output may be realized by changing the fixing manner of the clutch device 4.

When the clutch tooth forming disk 43 is separated from the motor rotor 23, the clutch tooth forming disk 43 can be engaged with the upper end cover 24 and at the same time, The spin tube 52 connected to the spinning tube 51 is in a fixed state, and therefore, in the laundry state, only the washing shaft 51 outputs a low speed, which is a typical washing output. When the clutch tooth forming disk 43 is separated from the motor rotor 23 and is in the non-fixed state, the washing shaft 51 outputs at a low speed and the spin tube 52 also outputs at a low speed at a specific speed ratio, Thereby realizing a combined power output. The fact that the clutch tooth forming disk 43 is not fixed means that the clutch tooth forming disk 43 is not engaged with any component in a fixed state and is connected to the clutch tooth forming disk 43 52 are also in a non-stationary state.

The magnetic field disappears and the spring force of the pressure spring 45 causes the clutch tooth forming disc 43 to slide axially downward along the outer spline of the spline sleeve 71 Thereby causing the clutch tooth forming disk 43 to engage with the motor rotor 23. Since the clutch tooth forming disk 43 and the spline sleeve 71 can not rotate relative to each other, the spin tube 52 connected to the spline sleeve 71 and the intermediate gear 331 fitted on the spin tube 52, Is fastened to the motor rotor 23, which results in self-locking of the gear reduction mechanism. Therefore, the spinning function is obtained by rotating the motor rotor 23 and the washing shaft 51 at the same speed.

It should be noted that the clutch device may achieve switching between the laundry state and the rotating state by engaging the other speed change element of the gear reduction mechanism with the motor rotor or by driving it to be separated from the motor rotor. In a typical laundry output in a laundered state, the clutch tooth forming disc of the clutch device may engage other fixed parts of the electric motor. There are many arrangements of clutch devices as long as the switching between the laundry state and the rotating state of the washing machine can be realized.

The spin tube 52 needs to withstand the weight of the laundry and therefore a flat bearing 52 is provided between the spin tube 52 and the intermediate gear 331 in order to limit the axial movement of the spin tube 52. [ A flat gasket, and an elastic retaining ring may be provided to limit the axial movement of the spin tube 52.

A first bearing 831 is provided between the spin tube 52 and the mounting plate 11 to rotate the washing shaft 51 and the spin tube 52 more stably in the rotating state and the output gear 332 And the lower end cover 25 are provided with a second bearing 832.

A first watertight member 61 is provided between the washing shaft 51 and the spin tube 52 and a second watertight member 62 is provided between the spin tube 52 and the mounting plate 11, Thereby preventing wash water from flowing into the interior of the driver during operation of the washing machine.

The washing machine driver according to the present application has been described in detail above. The principles and embodiments of the present application have been described herein as specific examples. The foregoing description and examples are merely intended to assist in understanding the methods and ideas of the present application. It will be understood by those skilled in the art that various modifications and improvements can be made to the present application without departing from the scope of the present application and that these variations and modifications are considered to be within the scope of the present application as defined by the claims must do it.

Claims (10)

In a washing machine driver,
An electric motor, a washing shaft, a spin tube fitted on the washing shaft, and a gear reduction mechanism,
The washing shaft is coaxially mounted in the motor rotor of the electric motor and is fixedly connected to the output gear of the gear reduction mechanism. The gear reduction mechanism includes an input gear shaft inserted into the shaft hole of the motor rotor
Washing machine driver. The method according to claim 1,
Wherein the gear reduction mechanism includes a first gear, a second gear, an intermediate gear, and the output gear;
Wherein the first gear and the second gear are fixed to two ends of the input gear shaft, respectively, the first gear meshing with the intermediate gear, and the second gear meshing with the output gear;
The intermediate gear is fitted on the spin tube, and the output gear is fixedly connected to the washing shaft
Washing machine driver. The method according to claim 1,
Wherein the gear reduction mechanism includes a dual gear, an intermediate gear, and the output gear;
The dual gear being fitted on the input gear shaft, the intermediate gear and the output gear being respectively engaged with the first gear and the second gear of the dual gear;
The intermediate gear is fitted on the spin tube, and the output gear is fixedly connected to the washing shaft
Washing machine driver. The method according to claim 2 or 3,
The intermediate gear may be an external gear or an internal gear ring
Washing machine driver. The method according to claim 2 or 3,
The output gear may be an external gear or an internal gearing
Washing machine driver. 4. The method according to any one of claims 1 to 3,
Wherein the driver further comprises a clutch device, the clutch device being provided between the spin tube and the motor rotor to realize a switching between a laundry state and a rotating state
Washing machine driver. The method according to claim 6,
The clutch tube of the clutch device is connected to the spin tube through a spline sleeve which is engaged with the spline sleeve and is connected to the spline sleeve in an axially slidable manner
Washing machine driver. 8. The method of claim 7,
In the laundering state, the clutch tooth forming disc engages an upper end cover of the electric motor;
In this state of rotation, the clutch teeth forming disc engages the motor rotor
Washing machine driver. 8. The method of claim 7,
In the washing state, the clutch tooth forming disk is not fixed;
In this state of rotation, the clutch teeth forming disc engages the motor rotor
Washing machine driver. The method according to claim 6,
The clutch device may be an electromagnetic clutch device or a mechanical clutch device
Washing machine driver.

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