CN210120460U - Gear box motor for ice machine - Google Patents

Abstract

The utility model relates to a gear box motor for ice maker belongs to ice maker technical field, solves current motor and is difficult to have the problem of little volume and high energy efficiency concurrently. The method comprises the following steps: a reduction gearbox, a controller and a brushless motor; the controller and the brushless motor are arranged on one side of the reduction box; the output shaft of the motor is connected with the input shaft of the reduction box; the speed reduction output shaft is arranged on the other side of the speed reduction box; the controller and the brushless motor have no overlapped part in the projection along the direction of the speed reduction output shaft and fall into the projection of the reduction box along the direction of the speed reduction output shaft; the sum of the projection areas of the controller and the brushless motor along the direction of the speed reduction output shaft is more than or equal to 80 percent of the projection area of the reduction box along the direction of the speed reduction output shaft; the size difference between the controller and the brushless motor along the direction of the speed reduction output shaft is less than or equal to 20 percent of the size of the controller or the brushless motor along the direction of the speed reduction output shaft of the speed reduction box. The utility model discloses small, high energy efficiency, control is convenient, and is with low costs, and the running noise is low.

Description

Gear box motor for ice machine

Technical Field

The utility model relates to an ice machine technical field especially relates to a gear box motor for ice machine.

Background

The gear box motor structures of domestic and foreign commercial ice makers and household ice breakers mostly adopt the structure of an inner rotor single-phase asynchronous motor and a gear box, so that the structure is large in size, difficult in intelligent rotation speed control, low in energy efficiency and high in energy consumption, and the manufacturing cost, the packaging cost and the transportation cost are high. In view of the current situation, a series of ice making machines with appropriate power and torque, small volume, high energy efficiency and convenient control are urgently needed in the market.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing analysis, the present invention is directed to a gear box motor for an ice making machine, which is used to solve the problem that the existing motor is difficult to have both small volume and high energy efficiency.

The purpose of the utility model is mainly realized through the following technical scheme:

the utility model provides an among the technical scheme, a gear box motor for ice maker, gear box motor for ice maker includes: a reduction gearbox, a controller and a brushless motor;

the controller and the brushless motor are arranged on one side of the reduction box; the motor output shaft of the brushless motor is connected with the input shaft of the reduction box; the speed reduction output shaft of the speed reduction box is arranged at the other side of the speed reduction box; the controller is used for controlling the operation of the brushless motor;

the controller and the brushless motor have no overlapped part along the projection of the reduction output shaft of the reduction gearbox and fall into the projection of the reduction gearbox along the direction of the reduction output shaft of the reduction gearbox;

the sum of the projection areas of the controller and the brushless motor along the direction of the reduction output shaft of the reduction gearbox is more than or equal to 80 percent of the projection area of the reduction gearbox along the direction of the reduction output shaft of the reduction gearbox;

the size difference between the controller and the brushless motor along the direction of the speed reducing output shaft of the speed reducing box is less than or equal to 20 percent of the size of the controller or the brushless motor along the direction of the speed reducing output shaft of the speed reducing box.

The utility model discloses among the technical scheme, brushless motor includes: the motor comprises a stator, a rotor and a motor rear cover;

the stator is cylindrical and is arranged in the rear cover of the motor, the stator is provided with a stator chip, the stator chip is provided with a wire frame, the wire frame is wound with an enameled wire, the enameled wire is provided with a leading-out end, and the leading-out end is electrically connected with the controller;

the rotor is inserted into the stator, the rotor is provided with a rotor shaft, and the rotor shaft is a motor output shaft of the brushless motor;

the motor rear cover is fixedly connected with the reduction gearbox through screws.

In the technical scheme of the utility model, the outer diameter of the stator is 30-75 mm;

the rotor shaft penetrates into the reduction box, and an oil retainer ring is arranged at the joint of the rotor shaft and the inner wall of the reduction box and is tightly matched with the rotor shaft.

In the technical scheme of the utility model, the controller comprises a driving board and a control shell;

the driving plate is arranged in the control shell, and the control shell is fixedly connected with the reduction gearbox through screws;

the driving plate is electrically connected with the leading-out terminal.

The utility model discloses among the technical scheme, the reducing gear box includes: the gear set, the gearbox cover and the gearbox body;

the gear box body and the gear box body can be fixedly arranged together, and the gear set is limited in the gear box; the rotor shaft penetrates through the gear box body and is connected with the input end of the gear set; the output end of the gear set is provided with a speed reduction output shaft which penetrates out of the gear box cover;

and a groove matched with the stator chip is arranged on the outer side of the gear box body.

The utility model discloses among the technical scheme, the gear train includes: a primary gear, a secondary gear, a tertiary gear and an output gear; the primary gear, the secondary gear and the tertiary gear are all duplicate gears;

the part of the rotor shaft penetrating into the gear box is provided with an input gear, the input gear is meshed with a first-stage gear, the first-stage gear is meshed with a second-stage gear, a third-stage gear is meshed with an output gear, and a speed reduction output shaft and the output gear are in coaxial transmission.

In the technical scheme of the utility model, both ends of the respective positioning shafts of the primary gear and the secondary gear are provided with oil-containing bearings or oil-free self-lubricating bearings; deep groove ball bearings are arranged at two ends of a positioning shaft of the third-stage gear;

the positioning shafts of the first-stage gear and the second-stage gear are of an integral structure; the positioning shaft of the third-stage gear is installed in a press-fit mode;

the respective positioning shafts of the first-stage gear, the second-stage gear and the third-stage gear are inserted into the gear box body and the gear box cover.

In the technical scheme of the utility model, one end of the positioning shaft of the output gear and the speed reduction output shaft are integrated into a whole, and a deep groove ball bearing is arranged; the other end is provided with an oil-containing output bearing or an oil-feeding-free lubricating bearing;

a plane thrust needle bearing or a plane thrust ball bearing is arranged between the oil-containing output bearing or the oil-supply-free lubrication bearing and the output gear; the outer diameter of the plane thrust needle roller bearing or the plane thrust ball bearing is 20-50mm, and the inner diameter is 8-20 mm;

or a tapered roller type thrust bearing is arranged between the output bearing containing oil or the oil-supply-free lubricating bearing and the output gear; the inner diameter of the tapered roller type thrust bearing is 8 to 20 mm.

In the technical scheme of the utility model, the transmission ratio of the gear set is 100-1200: 1;

the first-stage gear is a non-metal gear.

In the technical proposal of the utility model, the output power of the gear box motor for the ice maker is 10-140W, and the output torque range is 50-600kg cm.

The utility model discloses technical scheme can realize one of following effect at least:

1. the utility model optimizes the spatial position relationship of the motor, the controller and the reduction box, reduces the whole size as much as possible without obviously reducing the respective volume, improves the space utilization rate of the whole motor and is convenient for the miniaturization design of the motor;

2. the utility model discloses a gear train realizes the effect of speed reduction output, under the prerequisite that satisfies the demand of reduction ratio, can reduce energy loss as far as possible, improves energy utilization, guarantees the high energy efficiency of motor.

The utility model discloses in, can also make up each other between the above-mentioned each technical scheme to realize more preferred combination scheme. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout the drawings.

Fig. 1 is an exploded view of a gear box motor for an ice maker according to an embodiment of the present invention;

fig. 2 is a schematic view of the overall structure of a gear box motor for an ice maker according to an embodiment of the present invention;

fig. 3 is a schematic view of the internal structure of the reduction box of the gear box motor for the ice maker according to the embodiment of the present invention;

fig. 4 is a schematic structural view of a tapered roller type thrust bearing used for a reduction output shaft of a gear box motor for an ice maker according to an embodiment of the present invention.

Reference numerals:

1-a rotor shaft; 2-rotor chip; 3-a magnet; 4-an end plate; 5-a wire frame; 6-stator chip; 7-oil sealing; 8, a rear cover of the motor; 9-sealing ring; 10-a drive plate; 11-a control housing; 12-a gear housing; 13-circlip for hole; 14-a slinger; 15-primary gear; 16-gearbox cover; 17-planar output bearing; 18-oil containing output bearings; 19-a secondary gear; 20-a reduction output shaft; 21-tertiary gear; 22-positioning the shaft; 23-output gear.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the term "connected" should be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, which may be a mechanical connection, an electrical connection, which may be a direct connection, or an indirect connection via an intermediate medium. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The terms "top," "bottom," "above … …," "below," and "on … …" as used throughout the description are relative positions with respect to components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are multifunctional, regardless of their orientation in space.

The gear box motor structures of domestic and foreign commercial ice makers and household ice breakers mostly adopt the structure of an inner rotor single-phase asynchronous motor and a gear box, so that the structure is large in size, difficult in intelligent rotation speed control, low in energy efficiency and high in energy consumption, and the manufacturing cost, the packaging cost and the transportation cost are high. In view of the current situation, a series of ice making machines with appropriate power and torque, small volume, high energy efficiency and convenient control are urgently needed in the market. The utility model is used for gear motor actuating system on domestic appliance class ice machine. Its advantages are small size, high energy efficiency, convenient control, low cost and low noise.

Specifically, as shown in fig. 1 and fig. 2, an embodiment of the present invention provides a gear box motor for an ice maker, including: a reduction gearbox, a controller and a brushless motor; the controller and the brushless motor are arranged on one side of the reduction box; the motor output shaft of the brushless motor is connected with the input shaft of the reduction box; the reduction output shaft 20 of the reduction box is arranged at the other side of the reduction box; the controller is used for controlling the operation of the brushless motor; the controller and the brushless motor have no overlapped part along the projection of the reduction output shaft 20 direction of the reduction gearbox and fall into the projection of the reduction gearbox along the reduction output shaft 20 direction of the reduction gearbox; the sum of the projection areas of the controller and the brushless motor along the direction of the reduction output shaft 20 of the reduction gearbox is more than or equal to 80 percent of the projection area of the reduction gearbox along the direction of the reduction output shaft 20 of the reduction gearbox; the size difference between the controller and the brushless motor along the direction of the reduction output shaft 20 of the reduction gearbox is less than or equal to 20 percent of the size of the controller or the brushless motor along the direction of the reduction output shaft 20 of the reduction gearbox. The utility model discloses having optimized the spatial position relation of motor, controller and reducing gear box, under the prerequisite that does not obviously reduce separately the volume, having dwindled overall dimension as far as possible, improved the space utilization of whole motor, the miniaturized design of the motor of being convenient for.

The utility model discloses brushless motor includes: stator, rotor and motor back cover 8; the stator is cylindrical and is arranged in the rear cover 8 of the motor, the stator is provided with a stator chip 6, the stator chip 6 is provided with a wire frame 5, the wire frame 5 is wound with an enameled wire, the enameled wire is provided with a leading-out end, and the leading-out end is electrically connected with the controller; the rotor is inserted into the stator, the rotor is provided with a rotor shaft 1, and the rotor shaft 1 is a motor output shaft of the brushless motor; the motor rear cover 8 is fixedly connected with the reduction box through a screw; the rotor shaft 1 penetrates into the reduction box, and an oil retainer ring 14 is arranged at the joint of the rotor shaft 1 and the inner wall of the reduction box and is tightly matched with the shaft. Brushless motor mainly does the utility model discloses the power supply, through the reducing gear box with brushless motor's high-speed output conversion for the low-speed input that the ice machine needs. The outer diameter of the stator is 30-75mm by comprehensively considering the output power and the size of the brushless motor

The embodiment of the present invention provides a controller mainly used for controlling the operation of a brushless motor, which may include starting and stopping, or accelerating and decelerating. Specifically, the controller in the embodiment of the present invention includes a driving board 10 and a control housing 11; the driving plate 10 is arranged in a control shell 11, and the control shell 11 is fixedly connected with the reduction gearbox through screws; the drive plate 10 is electrically connected to the terminals.

The reducing gear box does the utility model discloses well core part that reduces rotational speed and increase the moment of torsion is specific, in the embodiment of the utility model, the reducing gear box includes: gear set, gearbox cover 16 and gearbox housing 12; the gearbox housing 12 and the gear box body can be fixedly installed together and limit the gear set in the gearbox; the rotor shaft 1 penetrates through the gear box body 12 and is connected with the input end of the gear set; the output end of the gear set is provided with a speed reduction output shaft 20, and the speed reduction output shaft 20 penetrates out of the gear box cover 16; the outer side of the gear box body 12 is provided with a groove matched with the stator chip 6.

In order not to increase the whole size of reducing gear box and guarantee under the prerequisite of drive ratio demand, energy consumption as far as possible reduces, as shown in fig. 3, in the embodiment of the utility model, the gear train includes: a primary gear 15, a secondary gear 19, a tertiary gear 21, an output gear 23; the primary gear 15, the secondary gear 19 and the tertiary gear 21 are all duplicate gears; the part of the rotor shaft 1 penetrating the gear box is provided with an input gear, the input gear is meshed with a first-stage gear 15, the first-stage gear 15 is meshed with a second-stage gear 19, a third-stage gear 21 is meshed with an output gear 23, and a speed reduction output shaft 20 and the output gear 23 are in coaxial transmission.

In order to further reduce energy loss, in the embodiment of the present invention, both ends of the respective positioning shafts 22 of the first-stage gear 15 and the second-stage gear 19 are respectively provided with an oil-containing bearing or an oil-free self-lubricating bearing; deep groove ball bearings are arranged at two ends of a positioning shaft 22 of the third-stage gear 21; the positioning shafts 22 of the primary gear 15 and the secondary gear 19 are of an integral structure; a positioning shaft 22 of the tertiary gear 21 is installed in a press-fit mode; the positioning shafts 22 of the primary gear 15, the secondary gear 19 and the tertiary gear 21 are inserted into the gear box body 12 and the gear box cover 16; one end of a positioning shaft 22 of the output gear 23 and the speed reduction output shaft 20 are of an integral structure and are provided with deep groove ball bearings; the other end is provided with an oil-containing output bearing 18 or an oil-supply-free lubrication bearing.

Considering that the reduction output shaft 20 may bear an external axial force, in the embodiment of the present invention, a needle bearing or a ball bearing for plane thrust is disposed between the output gear 23 and the output bearing 18 containing oil or the lubrication bearing without oil supply; the outer diameter of the plane thrust needle roller bearing or the plane thrust ball bearing is 20-50mm, and the inner diameter is 8-20 mm; or a tapered roller type thrust bearing is arranged between the oil-containing output bearing 18 or the oil-supply-free lubrication bearing and the output gear 23; as shown in FIG. 4, the inner diameter of the tapered roller type thrust bearing is 8 to 20 mm. The gear set of the embodiment of the utility model has a transmission ratio of 100-1200: 1; the primary gear 15 is a non-metal gear.

The embodiment of the utility model provides a can provide power for the ice machine steadily, output is 10-140W, and the output torque scope is 50-600kg cm.

Example 1

As shown in fig. 1, a gear box motor of a commercial ice maker and a household ice crusher mainly comprises a brushless motor for driving, a controller, a reduction box and other specific parts. The brushless motor for driving mainly comprises a rotor part, a stator part and a motor rear cover 8, wherein an input gear is processed on a rotor shaft 1, a rotor chip 2 is pressed on the rotor shaft 1, a magnet 3 is arranged on the rotor chip 2, two ends of the magnet 3 are fixed by an end plate 4 or a balance block, two ends of the rotor shaft 1 are provided with rotor shaft 1 bearings, one rotor shaft 1 bearing is arranged on the motor rear cover 8, and the other rotor shaft is fixed on a gear box body 12 after a stator component is arranged; a stator chip 6 is arranged on the stator component, wire racks 5 are respectively arranged at two ends of the stator chip 6, enameled wires with different specification parameters and outgoing wires are wound on the wire racks 5 according to different performances, the outgoing wires are connected with a controller, a positioning boss is arranged on the stator chip 6 on the stator component and matched with a groove arranged on the gear box body 12, and a stator and rotor component and a motor rear cover 8 are fixed on the gear box body 12 by screws; the motor outgoing line is connected with a driving plate 10, and the driving plate 10 is fixed on a control shell 11 by screws and is fixed on a gear box body 12 by screws; the bearing hole of the rotor shaft 1 is blocked on the gear box body 12 by an elastic retainer ring 13, and an oil retainer ring 14 is added at the outer end and fixed on the rotor shaft 1; the gear box body 12 is internally provided with a first-stage gear 15, a second-stage gear 19, a third-stage gear 21 and an output gear 23, and two ends of the gear and the second-stage gear 19 are respectively inlaid with two similar bearings such as an oil-containing output bearing 18 or an oil-feeding-free lubrication bearing, the inner bores of the similar bearings such as the oil-containing output bearing 18 or the oil-feeding-free lubrication bearing are respectively provided with a positioning shaft 22 and a shaft sleeve in a sliding fit manner, the positioning shaft 22 is pressed into the third-stage gear 21, the two ends of the positioning shaft 22 are provided with bearings, the output gear 23 is fixed on a reduction output shaft 20 by a flat key and an elastic retainer ring, the reduction output shaft 20 is provided with a bearing close to the shaft extension end, the reverse side is provided with the oil-containing bearing 18 and a flat output bearing 17, the flat output bearing 17 is a flat needle roller bearing or a flat thrust ball bearing, the shaft extension end is provided with an oil seal 7 and fixed on a gear box, the assembly is fixed by screws with locating pins. The gear box is big gear ratio low rotational speed box, and box gear ratio is at 1: 100-1: 1200. The outer diameter of the brushless motor stator is between 30mm and 75 mm. The primary gear 15 is a non-metal gear, i.e., a POM gear or a similar gear. The shaft extension end of the output gear 23 is provided with a deep groove ball bearing, the bearing matched with the other end is a similar bearing such as an oil-containing output bearing 18 or a non-oil-feeding lubrication bearing, and an outer diameter of 20-50mm is arranged between the similar bearing such as the oil-containing output bearing 18 or the non-oil-feeding lubrication bearing and the output gear 23, and a plane output bearing 17 with an inner diameter of 8-20mm is also a plane thrust needle bearing or a plane thrust ball bearing classified by the industry, or a tapered roller type thrust bearing with the inner diameter of 8-20 mm.

The novel brushless motor is described in the type of a brushless motor with a control driver, but the motor can be applied to any type of motor, any structure of the motor structure, and the like. The utility model discloses the output power scope is 10-140W, and the output torque scope is 50-600kg cm.

To sum up, the embodiment of the utility model provides a gear box motor for an ice maker, the utility model optimizes the spatial position relationship of the motor, the controller and the reduction box, reduces the whole size as much as possible without obviously reducing the respective volume, improves the space utilization rate of the whole motor, and is convenient for the miniaturization design of the motor; the utility model discloses a gear train realizes the effect of speed reduction output, under the prerequisite that satisfies the demand of reduction ratio, can reduce energy loss as far as possible, improves energy utilization, guarantees the high energy efficiency of motor.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims (10)

1. A gear box motor for an ice maker, comprising: a reduction gearbox, a controller and a brushless motor;

the controller and the brushless motor are arranged on one side of the reduction gearbox; the motor output shaft of the brushless motor is connected with the input shaft of the reduction box; the speed reduction output shaft (20) of the speed reduction box is arranged on the other side of the speed reduction box; the controller is used for controlling the operation of the brushless motor;

the controller and the brushless motor have no overlapped part in the projection along the direction of the reduction output shaft (20) of the reduction gearbox and fall into the projection of the reduction gearbox along the direction of the reduction output shaft (20) of the reduction gearbox;

the sum of the projection areas of the controller and the brushless motor along the direction of the reduction output shaft (20) of the reduction gearbox is more than or equal to 80 percent of the projection area of the reduction gearbox along the direction of the reduction output shaft (20) of the reduction gearbox;

the size difference of the controller and the brushless motor along the direction of the reduction box speed reduction output shaft (20) is less than or equal to 20% of the size of the controller or the brushless motor along the direction of the reduction box speed reduction output shaft (20).

2. The gear box motor for ice maker according to claim 1, wherein said brushless motor comprises: a stator, a rotor and a motor rear cover (8);

the stator is cylindrical and is installed in the motor rear cover (8), the stator is provided with a stator chip (6), a wire frame (5) is arranged on the stator chip (6), an enameled wire is wound on the wire frame (5), the enameled wire is provided with a leading-out end, and the leading-out end is electrically connected with the controller;

the rotor is inserted into the stator, the rotor is provided with a rotor shaft (1), and the rotor shaft (1) is a motor output shaft of the brushless motor;

the motor rear cover (8) is fixedly connected with the reduction gearbox through screws.

3. A gear box motor for an ice maker according to claim 2, wherein an outer diameter of the stator is 30-75 mm;

the rotor shaft (1) penetrates into the reduction gearbox, and an oil retainer ring (14) is arranged at the joint of the rotor shaft (1) and the inner wall of the reduction gearbox and is tightly matched with the rotor shaft.

4. The gear box motor for ice maker according to claim 2 or 3, wherein the controller includes a driving plate (10) and a control housing (11);

the driving plate (10) is arranged in the control shell (11), and the control shell (11) is fixedly connected with the reduction gearbox through screws;

the driving plate (10) is electrically connected with the leading-out terminal.

5. A gearbox motor for an ice maker according to claim 2 or 3, wherein the reduction gearbox comprises: a gear set, a gearbox cover (16) and a gearbox housing (12);

the gearbox and gearbox housing (12) being fixedly mountable together and confining the gear set within the gearbox; the rotor shaft (1) penetrates into the gear box body (12) and is connected with the input end of the gear set; the output end of the gear set is provided with a speed reduction output shaft (20), and the speed reduction output shaft (20) penetrates out of the gear box cover (16);

and a groove matched with the stator chip (6) is formed in the outer side of the gear box body (12).

6. The gearbox motor for ice maker as set forth in claim 5, wherein said gear train comprises: a primary gear (15), a secondary gear (19), a tertiary gear (21) and an output gear (23); the primary gear (15), the secondary gear (19) and the tertiary gear (21) are all duplicate gears;

the part of the rotor shaft (1) penetrating into the gear box is provided with an input gear, the input gear is meshed with a primary gear (15), the primary gear (15) is meshed with a secondary gear (19), a tertiary gear (21) is meshed with an output gear (23), and the speed reduction output shaft (20) and the output gear (23) are in coaxial transmission.

7. The gear box motor for ice maker as claimed in claim 6, wherein both ends of the positioning shaft (22) of each of the primary gear (15) and the secondary gear (19) are provided with oil-impregnated bearings or oil-starved self-lubricating bearings; deep groove ball bearings are arranged at two ends of a positioning shaft (22) of the third-stage gear (21);

the positioning shafts (22) of the primary gear (15) and the secondary gear (19) are of an integral structure; a positioning shaft (22) of the three-stage gear (21) is installed in a press-fit mode;

and the positioning shafts (22) of the primary gear (15), the secondary gear (19) and the tertiary gear (21) are respectively inserted into the gear box body (12) and the gear box cover (16).

8. The gear box motor for ice maker as claimed in claim 6, wherein one end of the positioning shaft (22) of the output gear (23) is integrated with the speed reduction output shaft (20) and is provided with a deep groove ball bearing; the other end is provided with an oil-containing output bearing (18) or an oil-supply-free lubrication bearing;

a plane thrust needle roller bearing or a plane thrust ball bearing is arranged between the oil-containing output bearing (18) or the oil-supply-free lubrication bearing and the output gear (23); the outer diameter of the plane thrust needle roller bearing or the plane thrust ball bearing is 20-50mm, and the inner diameter of the plane thrust needle roller bearing or the plane thrust ball bearing is 8-20 mm;

or a tapered roller type thrust bearing is arranged between the oil-containing output bearing (18) or the oil-supply-free lubrication bearing and the output gear (23); the inner diameter of the tapered roller type thrust bearing is 8-20 mm.

9. A gearbox motor for ice maker according to any one of claims 6 to 8, wherein the gear ratio of said gear set is 100-1200: 1;

the primary gear (15) is a non-metal gear.

10. The gear box motor for ice maker according to claim 9, wherein the output power of the gear box motor for ice maker is 10-140W, and the output torque is in the range of 50-600 kg-cm.

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