JP2003143808A - Geared motor, ice-maker using the same, and motor unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a geared motor which enables the low revolution while a torque is not increased without adding a surplus mechanism or changing a shape of the motor, can protect its gear from damages, and enables a stable operation for a long time even if a driven member is put into a so-called locking state. SOLUTION: This ice-maker 1 has a geared motor 2 which drives driven members such as an ice taking-out member 3 in an ice-making chamber, etc. A row of gears, which transmit a rotation of a rotor to a driven member 3, have an intermittent rotation mechanism comprising a driving gear turned by the rotation of the rotor and a driven gear geared with the driving gear and turned intermittently. the driving gear has teeth for moving the driven gear and a restricting part which makes the driven gear stationary for a certain period and prevents the driven gear from rotation for that period. A driving period, while the driven gear is moved, and a stationary period, while the driven gear is made to be stationary against a torque applied by an output shaft via the row of gears, are alternately provided to drive the driven member intermittently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a geared motor having a gear mechanism such as a reduction gear mechanism, a motor unit, and an ice maker using the geared motor. More specifically, the present invention relates to an improvement of a geared motor or the like that can rotate at a low speed and does not increase the torque.

[0002]

2. Description of the Related Art Conventionally, there is known a geared motor having a gear mechanism such as a reduction gear mechanism adopting an AC synchronous motor. Such geared motors are used in various motor units. For example, a geared motor is used in a motor unit such as an ice maker in a refrigerator or a turntable drive unit of a heating cooker. This is an advantage that even if the drive member connected to the output shaft of the motor is locked a little (= stops operation), the current does not rise or heat is generated unlike the DC motor, and that a commercial power source can be used. And so on. In these synchronous geared motors, the speed reducing mechanism reduces the number of rotations in the output shaft portion, while increasing the torque of the output shaft so that the drive member is operated reliably. That is, the motor has a low rotation speed and a high torque.

Further, in a conventional ice maker, it is constructed such that the ice accretion portion in the ice tray is slightly melted by the heater of the ice tray and the take-out member is rotated to drop the ice from the ice tray into the ice storage chamber. There is something. When the take-out member of such an ice maker is driven by a geared motor that employs an AC synchronous motor, the geared motor is operated after a predetermined time has elapsed from the start of energization of the heater.
Therefore, when the geared motor is driven with high torque, the take-out member is rotated with high torque, and the ice in the ice tray is smoothly separated from the ice tray and dropped into the ice storage chamber.

[0004]

In the conventional ice maker, even if the heater of the ice tray is energized to melt the ice deposit portion, the ice deposit portion between the ice and the ice tray is not completely removed. It may not be melted. In addition, in order to simplify the switch control, it is sometimes desired to operate the geared motor at the same time as energizing the heater. In each of these cases, at the beginning of the energization of the motor, even if the take-out member tries to take out the ice, the ice does not come off from the ice tray because the ice adheres.
The operation of the take-out member is stopped. That is, the output shaft of the geared motor is in a so-called locked state. Then, high torque is applied to the gears in the gear train, and there is a risk that tooth loss may occur.

Such a danger is always accompanied by the high torque property of the geared motor which is required to rotate at a low speed. For this reason, the geared motor adopting the conventional AC synchronous motor is costly to strengthen the strength of the gear, or conversely, is used not to reduce the rotation speed. On the other hand, an ice maker that uses a geared motor responds by applying a heater to melt the ice sufficiently, tightening the accuracy of the heater energization control, and adopting a large motor. However, with these measures, there are problems that the cost is too high, the assembling efficiency is poor, the device is upsized, and the ice is excessively melted. In addition, an ice maker that does not take these measures has a short-term failure and has a short life.

It is an object of the present invention to provide a synchronous geared motor and a motor unit that does not increase the torque at low speed without adding an extra mechanism or changing the shape of the motor portion. . It is another object of the present invention to provide an ice maker that can obtain stable operation for a long period of time without damaging gears even when a driving member such as a take-out member for taking out ice is in a so-called locked state.

[0007]

In order to achieve such an object, in the invention according to claim 1, an output connected to a driving member for driving the rotation of the rotor below freezing point through a gear mechanism including a gear train. In a synchronous geared motor that transmits to a shaft, a gear wheel train is provided with an intermittent rotation mechanism composed of a driving gear that rotates by receiving rotation of a rotor and a driven gear that meshes with the driving gear and intermittently rotates. Is provided with a tooth portion for moving the driven gear and a regulating portion for stopping the driven gear for a certain period of time, and for preventing the rotation of the driven gear during that period, so that the driving period for moving the driven gear and the driven gear are stopped. The driving member is intermittently driven by alternately providing stationary periods that can be performed.

According to the second aspect of the invention, the first aspect is
In the geared motor described above, the rotation of the rotor is stopped at a position where the teeth of the driving gear and the teeth of the driven gear do not mesh with each other.

According to a third aspect of the present invention, there is provided the motor unit according to the first or second aspect, in which the output shaft is connected to a drive member for temporarily forcibly stopping the rotation of the output shaft. ing.

Further, according to the invention of claim 4, in an ice maker having a geared motor for operating a drive member in an ice making chamber such as an ice tray or an ice separating member, a gear train for transmitting rotation of a rotor to the drive member is provided. , An intermittent rotation mechanism including a driving gear that rotates in response to the rotation of the rotor and a driven gear that meshes with the driving gear and that rotates intermittently, and the driving gear includes a tooth portion for moving the driven gear and a driven gear. The stationary member for a certain period of time, and a regulating portion for preventing the rotation of the driven gear during that period are provided, and by alternately providing a driving period for moving the driven gear and a stationary period for allowing the driven gear to be stationary, the driving member is It is driven intermittently.

Further, according to the invention of claim 5, in an ice maker having a geared motor for operating a drive member in an ice storage chamber such as an ice crusher, the rotation of the rotor is connected to a gear train that transmits the rotation of the rotor to the drive member. An intermittent rotation mechanism consisting of a driving gear that rotates in response to the driving gear and a driven gear that meshes with the driving gear and rotates intermittently is provided.The driving gear has a tooth portion for moving the driven gear and the driven gear for a certain period. The driving member is intermittently driven by providing a regulating portion for stopping the rotation of the driven gear during the stationary period and alternately providing a driving period for moving the driven gear and a stationary period for keeping the driven gear stationary. I am trying.

In addition, in the invention according to claim 6, in the ice maker according to claim 4 or 5, a plurality of meshing tooth portions that mesh with the tooth portions are continuously provided on the driven gear, and Each meshing tooth part is asymmetrical about each tooth, the driven gear is intermittently rotated when the driving gear rotates in a predetermined direction, and the driven gear does not rotate when the driving gear rotates in a direction opposite to the predetermined direction. It is reversed so that it can rotate in the direction.

In the synchronous geared motor of the present invention, the rotation of the rotor is transmitted to the output shaft via the gear mechanism including the gear train. Further, it is not decided in which direction the rotor will rotate at the time of startup. For example, if the rotor rotates in a certain direction and the driving gear rotates in a predetermined direction,
The driven gear that meshes with the driving gear and rotates intermittently rotates intermittently. As a result, the output shaft can be one that does not have high torque even though it rotates at a low speed. When the output shaft portion has a low torque, the drive member connected to this output shaft does not operate, and even if the output shaft is forcibly and temporarily stopped, the gear in the motor unit with the drive member is damaged. do not do.

Further, the ice maker of the present invention has a geared motor which is so-called intermittently driven. That is, the rotation of the rotor is transmitted from the driving gear to the driven gear, and the driven gear rotates intermittently. Therefore, even if the drive member is in the locked state, the torque transmitted to the gear is not large, so that the torque applied to the gear is not large. When the rotation of the rotor is stopped at a position where the teeth of the driving gear and the teeth of the driven gear do not mesh with each other, the rotor will start smoothly when the next rotor is started.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. Note that first, in FIG.
The first embodiment will be described with reference to FIGS.

The ice maker 1 includes a geared motor 2 and a geared motor 2 as shown in FIGS.
Ice removing member 3 serving as a driving member driven by
And an ice making chamber member 4 for forming poured water into ice, and an ice storage chamber (not shown) for storing the ice taken out from the ice making chamber member 4.
It is mainly composed of an ice guide member 5 which is dropped while sliding.

The geared motor 2 is composed of a small AC electric motor section and a gear section in which a reduction gear train, a cam and the like are incorporated. The detailed structure of the geared motor 2 will be described later.

The ice removing member 3, as shown in FIG.
The rotary shaft 6 is provided with a plurality of ice scrapers 7 protruding to the outer periphery. Each of the ice scraping portions 7 is supported by the reinforcing portions 8 on both sides thereof, and is rotated 360 degrees in the direction of the arrow A by the geared motor 2 each time. The reinforcing portion 8 has a function of reinforcing the ice scraping portion 7 so as not to be broken or removed, and also has a function of placing the taken-out ice and sliding it to move it to the ice guide member 5 side. There is.

A heater (not shown) is embedded in the lower portion of the ice making chamber member 4 so that the ice in the ice making chamber member 4 can be easily taken out. Further, in the ice making chamber member 4, a plurality of partition plates 9 are provided, and a bearing member 10 for bearing the rotating shaft 6 of the ice extracting member 3 is attached on the side opposite to the side on which the geared motor 2 is attached. . The ice guiding member 5 has a plurality of passage notches 11 through which the ice scraping portion 7 of the ice removing member 3 passes, and a plurality of blade-like sliding portions 12 on which the ice slides.

As shown in FIG. 6, the geared motor 2 includes a stator board 22 which also serves as a lower case, a lid case 23 which is combined with the upper surface of the stator board 22, and a coil bobbin 24.
, Coil winding 25, stator substrate 26, rotor 2
7 and a gear mechanism 28 including a reduction gear train.

The stator substrates 22 and 26 are both made of magnetic plates, and are fixed with the coil bobbin 24 sandwiched therebetween. The coil bobbin 24 is made of an insulating material such as plastic, and includes a hollow cylindrical winding drum portion 29 and flange portions 30 integrally formed at both ends of the winding drum portion 29. The outer surface of the flange portion 30 is in contact with the stator substrates 22 and 26. The coil winding 25 is wound around the outer circumference of the winding body portion 29 and protrudes from the terminal cover 33 to the outside via the terminal 32 of the terminal block 31 integrally formed with the flange portion 30.

The stator boards 22 and 26 are aligned with the side surfaces of the flange portion 30, and are provided with a plurality of comb tooth-shaped pole teeth 34 in a bent state along an annular hole at the center thereof. These pole teeth 34 are arranged on the inner circumference of the winding drum section 29 and face the outer circumference of the rotor 27.

The rotor 27 has a circular permanent magnet 3
6 and a rotor gear portion 37 at the center position thereof, and is rotatably supported by a rotor shaft 35 fixed between a stator substrate 22 also serving as a lower case and a lid case 23. The permanent magnet 36 has an outer peripheral surface
The magnets are magnetized so as to have different polarities alternately, and they correspond to each other while forming gaps with the pole teeth 34. The rotation of the rotor 27 is performed by the gear mechanism 2 including the pinion 38 of the rotor gear unit 37.
8 is transmitted to the output shaft 39.

The gear mechanism 28 includes a pinion 38, a first gear 41 having a gear portion 40 meshing with the pinion 38,
The driven gear 4 that meshes with the driving gear 42 of the first gear 41
A third gear 47 having a second gear 44 having the number 3 and a gear portion 46 meshing with the pinion portion 45 of the second gear 44.
An output shaft 39 having a fourth gear 50 having a gear portion 49 meshing with the pinion portion 48 of the third gear 47 and a gear portion 52 meshing with the pinion portion 51 of the fourth gear 50.
Formed from. The output shaft 39 is provided with an output gear portion 53 for further transmitting the rotation.

These gears 41, 44, 47 and 50 are
It is rotatably supported by gear shafts 54, 55, 56, 57 provided between the stator substrate 26 and the lid case 23. In this embodiment, each gear 41, 4
4, 47 and 50 are all compound gears (two-stage gears) and are thicker in the axial direction than spur gears. However, if these are spur gears, the geared motor 2 can be made thin. it can.

The output shaft 39 is formed by integrally molding the output side output gear portion 53, the gear portion 52, and the shaft portion with resin. The output shaft 39 is rotatably supported by the bearing portion 58 of the flange portion 30 protruding from the hole of the stator substrate 26 and the radial bearing portion 59 protruding by drawing of the lid case 23. The output gear portion 53 of the output shaft 39 is connected to the ice extracting member 3 of the ice maker 1.

The first gear 41 is the gear 40 and the driving gear 4.
2 and. Then, as shown in FIG. 9, the driving gear 42 includes a tooth portion 60 that meshes with the driven gear 43 of the second gear 44, and a restricting portion 61 for keeping the second gear 44 stationary.
And are provided. Further, a tooth forming hole 62 is formed in the restriction portion 61 adjacent to the tooth portion 60. In addition, in this embodiment, the tooth portion 60 is formed from one tooth 60a, and the tooth forming hole 62 is also one. Further, the driving gear 42 and the driven gear 43 constitute an intermittent rotation mechanism. The diameter of the root of the tooth portion 60 is smaller than the diameter of the restriction portion 61.

In the case of a normal intermittent rotating mechanism capable of rotating in both directions, the tooth portion 60 is provided with two teeth 60a and 60b like the first gear 65 shown in FIG.
Is symmetrically formed, this first gear 41 has
The tooth 60b has a notched shape. By having such a left-right asymmetrical shape, as will be described later, an intermittent rotation mechanism that only rotates in one direction is provided.

The second gear 44 has a driven gear 43 and a pinion portion 45. Then, as shown in FIG. 10, the driven gear 43 has the first fitting portion 70 into which the tooth 60a of the tooth portion 60 is inserted when the first gear 41 rotates counterclockwise in FIG.
And a transmission portion 71 whose rotation is transmitted by the tooth 60a.
A meshing tooth 72 fitted in the tooth forming hole 62, and the first gear 4
1 rotates clockwise in FIG. 5, the tooth 60a of the tooth portion 60
The second fitting portion 73 for preventing the rotation of the second fitting
Is provided.

When the rotation of the first gear 41 and the second gear 44 is not transmitted, the outer peripheral surface of the restricting portion 61 of the first gear 41 contacts the two meshing teeth 72, 72 of the second gear 44. Since they are in contact with each other, the second gear 44 is prevented from rotating. Further, in this state, the lower surface 71a of the transmission portion 71 of the second gear 44 faces the upper surface 61a of the restriction portion 61. Further, the tooth 60a, each meshing tooth 72,
The surfaces of the transmission portion 71 that come into contact with the teeth 60a are tooth profiles of involute curves, but may be other tooth profile curves.

The operations of the ice maker 1 and the geared motor 2 configured as described above are as follows.

When a signal is issued to instruct the ice making chamber member 4 to take out the ice from the refrigerator, the ice maker 1
First, the heater of the ice making chamber member 4 is first energized to melt the ice portion adhering to the bottom of the ice making chamber member 4. On the other hand, when the heater is energized, the geared motor 2 is also energized.

When the stator substrates 22 and 26 are excited by energizing the coil winding 25, the rotor 27
Rotate in either direction due to magnetic interaction.
If the rotation of the rotor 27 is clockwise in FIG. 5, the first gear 41 rotates counterclockwise. Then, as shown in FIGS. 11 and 12, the teeth 60a enter the first fitting portion 70, transmit the rotation to the transmission portion 71, and rotate the second gear 44.
Rotate clockwise. The rotation causes the meshing teeth 72
Enters the tooth forming hole 62, and the rotation is continued. When the tooth 60a comes out of the first fitting portion 70, the outer peripheral surface of the restriction portion 61 comes into contact with the two meshing teeth 72, 72, and the second gear 44 is prevented from rotating. On the other hand, the first gear 41 continues to rotate,
The tooth 60a again approaches the second gear 44 and enters the next first fitting portion 70. In this way, the second gear 44 rotates intermittently. As a result, the rotation transmitted from the first gear 41 to the second gear 44 is significantly reduced. Then, the rotation of the rotor 27 is transmitted to the output shaft 39 via the gear mechanism 28 that serves as the reduction gear train, that is, the gears 41, 44, 47, 50, and is transmitted to the driven member as a rotary motion.

On the other hand, if the rotor 27 rotates counterclockwise in FIG. 5, the first gear 41 rotates clockwise. Then, as shown in FIG. 13, the tooth 60a enters the second fitting portion 73, smoothly abuts on the transmission portion 71, and tries to push the transmission portion 71. However, since the meshing teeth 72 adjacent to the second fitting portion 73 abut against the outer periphery of the restriction portion 61, the second gear 44 cannot rotate any further. As a result,
The rotor 27 is inverted. That is, the rotor 27 starts rotating clockwise in FIG. 5, and the first gear 41 rotates counterclockwise. Then, the tooth 60a enters the first fitting portion 70 on the opposite side across the second fitting portion 73 and the transmission portion 71, and is in a state capable of rotation transmission.

As described above, no matter which direction the rotor 27 rotates, the intermittent rotation mechanism of the first gear 41 and the second gear 44 transmits only the rotation in a certain direction, so that the rotation direction can be regulated. Becomes Moreover, since the rotation is decelerated and transmitted by the intermittent rotation mechanism, the same function as that of the conventional geared motor having the reduction gear train is provided. In addition, the intermittent rotation mechanism can easily change the reduction ratio by setting various numbers of the tooth portions 60 of the driving gear 42 of the first gear 41, for example. In addition, when rotation transmission is not performed, that is, the teeth 60
When “a” abuts against the transmission portion 71, it smoothly abuts along the tooth profile, so that no collision noise is generated unlike when the reverse rotation prevention lever is used.

When the output shaft 39 starts to rotate in a predetermined direction,
The ice removing member 3 connected to the output shaft 39 tends to rotate in the direction of arrow A in FIG. However, since the effect of the heater does not immediately come out, the ice in the ice making chamber member 4 still adheres to the bottom of the ice making chamber member 4. Therefore, the geared motor 2 is in a so-called locked state. However, since the motor section is an AC small synchronous motor, the current does not rise and heat is not generated. Moreover, since the intermittent rotation mechanism is provided, the output shaft 39 can have a low torque while rotating at a low speed. Therefore, even if it is locked,
The torque applied to each gear in the gear mechanism 28 does not become large, and damage such as missing teeth does not occur.

When the ice adhering portion is melted after a lapse of a predetermined time, the torque of the ice ejecting member 3 exceeds the ice adhering force between the ice making chamber member 4 and the ice, and the ice ejecting member 3 is indicated by an arrow in FIG. Rotate in the A direction. Then, the ice in the ice making chamber member 4 is dropped into the ice storage chamber. After that, water is supplied to the empty ice making chamber member 4. This water supply is controlled by a cam in the geared motor 2 and a micro switch (both not shown). This control requires extremely high accuracy. That is, if the control accuracy is low, water may overflow from the ice making chamber member 4,
On the contrary, it is possible to make only a small amount of ice. Here, in the geared motor 2, the cam is also operated via the intermittent rotation mechanism. Therefore, by setting either one or both of the switching of the water supply from OFF to ON and the switching from ON to OFF according to the part where the intermittent rotation mechanism operates, an accurate water supply time is set. It is possible.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, only the intermittent rotation mechanism is changed, and the other parts are an ice maker 1 and a geared motor 2 having the same configurations as those of the first embodiment. This second
In the embodiment, the one-way rotation is achieved by changing the driven gear side in the conventional intermittent rotation mechanism. In the description, the same parts as those in the first embodiment are
The same reference numeral will be used.

The first gear 65 is composed of the gear portion 40 and the driving gear 4.
2 and. As shown in FIG. 14, the driving gear 42 has a tooth portion 60 that meshes with the driven gear 43 of the second gear 66, and a restricting portion 6 for keeping the second gear 66 stationary.
1 and are provided. The tooth portion 60 is provided with two teeth 60a and 60b with the tooth profile forming hole 62 interposed therebetween, and the tooth portion 60 is formed symmetrically. In addition, the driving gear 42
And the driven gear 43 constitute an intermittent rotation mechanism.
The diameter of the root of the tooth portion 60 is smaller than the diameter of the restriction portion 61.

The second gear 66 has a driven gear 43 and a pinion portion 45. As shown in FIG. 15, the driven gear 43 has a second fitting portion 73 into which the tooth 60b of the tooth portion 60 is inserted when the first gear 65 rotates clockwise in FIG.
A transmission portion 71 to which rotation is transmitted by the teeth 60b,
A meshing tooth 72 fitted in the tooth forming hole 62 and a first fitting portion 70 in which the tooth 60a is fitted are provided. And this first
The fitting portion 70 is wider than the second fitting portion 73, and the meshing teeth 7
It is formed left-right asymmetrical about the center 2. Therefore, when the first gear 65 rotates counterclockwise in FIG. 5,
As shown in FIG. 18, the tooth 60a of the tooth portion 60 meshes, but the tooth 60b collides with the meshing tooth 72, and further rotation is blocked, and the first gear 65 starts to rotate in the opposite direction. On the other hand, when the first gear 65 rotates clockwise in FIG.
6 and FIG. 17, the rotation is transmitted and the second gear 66 rotates intermittently.

When the first gear 65 and the second gear 66 do not transmit the rotation, the outer peripheral surface of the restricting portion 61 of the first gear 65 contacts the two meshing teeth 72 of the second gear 66. Since they are in contact with each other, the second gear 66 is in a state in which its rotation is blocked. Further, in this state, the lower surface 71a of the transmission portion 71 of the second gear 66 faces the upper surface 61a of the restriction portion 61. Further, the teeth 60a and 60b, the meshing teeth 72, and the surfaces of the transmission portion 71 that abut against the teeth 60a and 60b are tooth profiles of involute curves, but other tooth profile curves may be used. Further, in the second embodiment, the rotation is restricted in the opposite direction to the case of the first embodiment, but the opposite side of the transmission part 71, that is, the second fitting part 73 side is cut. By omitting it, it is possible to restrict rotation in the same direction as in the first embodiment.

In each of the embodiments, the driving gear 4
Both the driven gear 43 and the driven gear 43 are made of resin made of polyacetal so that the collision noise is harder to generate, but they may be made of metal. Further, in each of the embodiments, the first gears 41 and 65 and the second gears 44 and 6 are used.
The sixth, third gear 47, and fourth gear 50 are all made of polyacetal and are lightweight and silent, but all or part may be made of metal. On the other hand, the output shaft 39 is made of a resin made of 66 nylon and has an excellent insulating property, but it may be made of metal as well. In order to prevent assembly mistakes,
In this embodiment, the first gears 41 and 65 and the second gears 44 and 66 are formed in white, the third gear 47 is formed in red, and the fourth gear 50 and the output shaft 39 are formed in gray. ,
All colors may be the same as before.

In addition, the intermittent rotation mechanism used in each of the embodiments can have a large reduction ratio as compared with a normal reduction gear, and the rotation torque of the output shaft 39 compared with a gear of the same size. Because it can be made a little smaller,
This is extremely advantageous when it is desired to greatly reduce the number of revolutions without making the rotational torque of the output shaft 39 so small.

The above-described embodiments are examples of preferred embodiments of the present invention, but the present invention is not limited to these, and various modifications can be made without departing from the gist of the present invention. Is. For example, the intermittent rotation mechanism may be provided not in the reduction gear train, but in the gear mechanism that accelerates as a whole. Further, the tooth portion 60 may be provided at two or more positions instead of one. Further, the tooth portion 60 of the first embodiment may have a plurality of teeth instead of one.

Further, the rotation direction of the geared motor 2 may be regulated by a conventionally known reverse rotation preventing lever. Further, in each of the above-described embodiments, the motor portion is an AC synchronous motor, but the present invention can be applied to other motors, for example, various geared motors in which a gear mechanism is attached to a stepping motor or the like. .

The ice maker 1 may be one in which the geared motor 2 is operated after the heater is energized and a predetermined time has elapsed. Also in this case, the ice may not be sufficiently melted depending on the time of energizing the heater, and there is a risk that a so-called locked state may occur. However, if the geared motor 2 shown in each embodiment is used, the gears in the gear mechanism 28 will not be damaged.

Further, the geared motor 2 can be applied to various motor units that rotate at a low speed and do not require much torque. In addition, if the geared motor of the present invention is applied to a motor unit in which a drive member such as the ice removing member 3 connected to the output shaft 39 is locked, the locked state may occur. The gears in the gear mechanism 28 can be prevented from being damaged, and the motor unit can have a long life.

Further, when the cam and the micro switch in the geared motor 2 are operated to stop the water supply, the stop of the power supply to the geared motor 2 is delayed a little to make the tooth portion 60 of the driving gear 42 in the intermittent rotation mechanism. Then, the rotation of the rotor 27 can be stopped at a position where the teeth of the driven gear 43 do not mesh with each other. With this configuration, when the rotor 27 is started next time, the driving gear 42 starts to rotate at a position where the tooth portion 60 and the teeth of the driven gear 43 are not meshed with each other, which is so-called free rotation, and smooth start is performed. . In addition, in order to stop at the position where the tooth portion 60 and the teeth of the driven gear 43 do not mesh with each other in this way, in addition to the above-described delay method, the rotor 27
Various methods such as a method using the inertia of the above can be adopted.

Further, the intermittent rotation mechanism may be provided in the gear portion near the output shaft 39. By doing so, the rotation of the ice extracting member 3 connected to the output shaft 39 becomes an intermittent rotation having an accelerating action, and a large torque can be instantaneously generated. Further, as the driving member of the ice maker 1, in addition to the ice removing member such as the ice removing member 3, other driving members such as a twisting member for twisting the ice tray itself and an ice crusher for crushing ice in the ice storage chamber may be adopted. it can.

[0050]

As described above, the geared motor according to the first aspect of the invention can be a motor that rotates at a low speed and does not increase the torque without modifying the shape. Therefore, it is not necessary for the gear in the gear mechanism to have high strength, and even if the output shaft is locked, the gear is not damaged and the motor does not generate heat.

In addition, according to the second aspect of the present invention, when the geared motor is restarted, so-called free rotation is performed, and a smooth start can be performed.

Further, in the motor unit according to the third aspect of the invention, the output member is configured to forcibly prevent the rotation of the output shaft, but the gear in the gear mechanism is not damaged and has a long life. be able to. Moreover,
Since the rotation of the output shaft is forcibly stopped, the output shaft can be immediately re-rotated when the forced force is removed, and the load can be quickly operated.

Further, in the ice maker according to claim 4,
The driving member in the ice making chamber can be operated by a motor that rotates at a low speed and does not increase the torque. Therefore, even if the drive member freezes due to the freezing point in the ice making chamber or the ice in the ice making chamber is taken out of the ice making chamber so that the drive member cannot operate, The gear mechanism is not damaged. Therefore, the ice maker can have a long life.

Further, in the ice maker according to claim 5,
The drive member in the ice storage chamber can be operated by the motor that rotates at a low speed and does not increase the torque. Therefore,
If the inside of the ice storage room is below freezing, the drive member freezes,
Even if the ice becomes a resistance when the ice in the ice storage chamber is crushed and cannot operate sufficiently, the gear mechanism in the ice maker is not damaged. Therefore, the ice maker can have a long life.

Further, in the ice maker according to the sixth aspect, the rotation of the rotor can be restricted in a predetermined direction without adding a device for changing the shape of the motor part or adding a mechanism such as a reverse rotation preventing lever. Therefore, the mechanism is simplified,
It is possible to become an ice maker with good production efficiency. Moreover, it is not necessary to make the gears of the gear wheel train to have high strength, and even if the drive member is locked by the load, the gears in the ice maker are not damaged and the ice maker can have a long life. it can.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an ice maker according to a first embodiment of the present invention.

FIG. 2 is a perspective view of an ice removing member used in the ice maker of FIG.

FIG. 3 is a perspective view of an ice making chamber member used in the ice maker of FIG. 1.

FIG. 4 is a perspective view of an essential part of an ice guide member used in the ice maker of FIG.

5 is a plan view showing the relationship between the gears of the geared motor used in the ice maker of FIG. 1, and is a plan view of the essential parts as seen from the direction of the arrow V in FIG. 6 and with the lid case removed.

6 is a cross-sectional view of the geared motor of FIG.

FIG. 7 is a plan view seen from the direction of arrow V in FIG.

8 is a development diagram of a train wheel showing a relationship between gears of the geared motor shown in FIG.

9 is a side view of the first gear of the geared motor of FIG.

10 is a side view of a second gear of the geared motor of FIG.

11 is a diagram for explaining a state when rotation is transmitted from the first gear to the second gear of the geared motor of FIG. 5, and is a diagram showing a state immediately before meshing.

FIG. 12 is a view for explaining a state when rotation is transmitted from the first gear to the second gear of the geared motor of FIG. 5, and is a diagram showing a meshed state.

13 is a diagram for explaining a state when the rotation of the first gear of the geared motor of FIG. 5 is not transmitted to the second gear.

FIG. 14 is a side view of the first gear of the geared motor used in the ice maker according to the second embodiment of the present invention.

FIG. 15 is a side view of the second gear of the geared motor used in the ice maker according to the second embodiment of the present invention.

FIG. 16 is a diagram for explaining a state when rotation is transmitted from the first gear to the second gear of the geared motor used in the ice maker according to the second embodiment of the present invention, immediately before meshing. It is a figure showing the state of.

FIG. 17 is a diagram for explaining a state in which rotation is transmitted from the first gear to the second gear of the geared motor used in the ice maker according to the second embodiment of the present invention, and is a meshed state. It is the figure which has shown.

FIG. 18 is a diagram for explaining a state when rotation is not transmitted from the first gear to the second gear of the geared motor used in the ice maker according to the second embodiment of the present invention.

[Explanation of symbols]

1 ice maker 2 Geared motor 3 Ice removal member (driving member) 4 Ice-making chamber members 5 Ice guide member 27 rotor 28 gear mechanism 39 Output shaft 41 No. 1 gear 42 Driving gear (part of intermittent rotation mechanism) 43 Driven gear (part of intermittent rotation mechanism) 44 second gear 60 teeth 60a teeth 61 Regulatory Department 62 Tooth forming hole 65 number one gear 66 second gear 72 teeth

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Noriyuki Akabane             1020 Kaga, Iida City, Nagano Prefecture Sankyo Co., Ltd.             Seiki Seisakusho Iida Factory F term (reference) 5H607 AA12 BB01 CC03 DD19 EE34                       EE36 EE49 FF07

Claims (6)

[Claims] 1. A synchronous geared motor for transmitting the rotation of a rotor to an output shaft connected to a driving member driven below freezing through a gear mechanism including a gear train, wherein the gear train has the rotor. Is provided with an intermittent rotation mechanism consisting of a driving gear that rotates in response to rotation of the driven gear, and a driven gear that meshes with the driving gear and that intermittently rotates, and the driving gear has a tooth portion for moving the driven gear and the driven gear. While the gear is stationary for a certain period of time, a regulating portion is provided to prevent rotation of the driven gear during that period, and a drive period for moving the driven gear and a stationary period for allowing the driven gear to be stationary are alternately provided. A geared motor characterized in that the drive member is intermittently driven. 2. The geared motor according to claim 1, wherein the rotation of the rotor is stopped at a position where the teeth of the driving gear and the teeth of the driven gear do not mesh with each other. 3. The output shaft is connected to a drive member for temporarily forcibly stopping the rotation of the output shaft.
Alternatively, a motor unit using the geared motor described in 2. 4. In an ice maker having a geared motor for operating a driving member in an ice making chamber such as an ice tray or an ice separating member, a gear train for transmitting the rotation of the rotor to the driving member receives the rotation of the rotor. A driving gear that rotates in accordance with the invention, and an intermittent rotation mechanism that includes a driven gear that meshes with the driving gear and that rotates intermittently.The driving gear has a tooth portion for moving the driven gear and the driven gear for a certain period of time. A drive member is provided by providing a regulating portion for stopping the rotation of the driven gear during the stationary period, and alternately providing a driving period for moving the driven gear and a stationary period for keeping the driven gear stationary. An ice maker characterized by intermittent driving. 5. In an ice maker having a geared motor for operating a drive member in an ice storage chamber such as an ice crusher, a gear train that transmits the rotation of the rotor to the drive member is rotated by the rotation of the rotor. A gear and an intermittent rotation mechanism consisting of a driven gear that meshes with the driving gear and rotates intermittently are provided, and the driving gear has a tooth portion for moving the driven gear, and the driven gear is stationary for a certain period of time. , A regulating portion for preventing rotation of the driven gear during that period is provided, and the drive period is intermittently driven by alternately providing a drive period for moving the driven gear and a rest period for allowing the driven gear to be stationary. Ice maker characterized by doing so. 6. The driven gear is provided with a plurality of meshing tooth portions continuously meshing with the tooth portion over the entire outer periphery thereof, and each meshing tooth portion is left-right asymmetrical about each tooth, and When the driven gear is rotated in a predetermined direction, the driven gear is intermittently rotated, and when the driven gear is rotated in a direction opposite to the predetermined direction, the driven gear does not rotate and the driving gear is inverted so as to rotate in the predetermined direction. Claim 4 or 5
The listed ice maker.