KR20190137494A - Driving device for ice crushing device and manufacturing method for the same - Google Patents

Abstract

The present invention provides a driving device for an ice crushing device having reduced noise. According to embodiments of the present invention, the driving device for an ice crushing device comprises: a case; a motor arranged on the case; a driveshaft rotatably arranged on the case; and a plurality of gears sequentially engaged with each other to rotate to transfer torque from the motor to the driveshaft to rotate the driveshaft at a reduced rotating speed in comparison to a shaft of the motor. The plurality of gears include: at least one high-speed gear made of a first material; a transfer gear to rotate at a reduced rotating speed in comparison to the high-speed gear; and at least one low-speed gear which is made of a second material with higher strength than the first material, and rotates at a reduced rotating speed in comparison to the transfer gear. The transfer gear includes: a driven gear unit made of the first material and engaged with any one of the at least one high-speed gear; and a driving gear unit made of the second material, coupled to the driven gear unit to rotate as one unit, and engaged with any one of the at least one low-speed gear to transfer torque.

Description

Drive device for ice crushing device and its manufacturing method {DRIVING DEVICE FOR ICE CRUSHING DEVICE AND MANUFACTURING METHOD FOR THE SAME}

The present disclosure relates to a device for driving an ice crushing device and a method of manufacturing the same.

Generally, an ice maker includes a tray device for freezing ice and a dispenser for moving and taking out ice. Here, the dispenser may include an ice crushing device for crushing the ice.

The ice crushing apparatus includes a crushing unit configured to crush ice by rotation. For example, the crushing unit of the ice crushing device may include a blade (blade) that rotates about a predetermined axis of rotation, the ice pressed by the rotating blade may be crushed.

The ice crushing device includes a driving device for transmitting a predetermined torque to the crushing unit. The drive device for the ice crushing device includes a motor and a plurality of gears for transmitting the rotational force of the motor. Since a plurality of gears of the conventional drive device for ice crushing apparatus must transmit a torque enough to crush ice, the gears are made of a metal material having high strength.

Since a plurality of gears of the conventional drive device for ice crushing device is made of a metal material, there is a problem that the weight of the drive device is excessive and the cost is increased. In addition, there is a problem that the noise is increased due to the engagement between the gears of the metal of the conventional drive device for ice crushing device. Embodiments of the present disclosure solve this problem.

If a plurality of gears of the drive device for ice crushing device is made of a material such as resin, which is light and has low friction noise, in order to solve the above-mentioned problems of the prior art, the gears for transmitting a predetermined torque for crushing ice There is a problem that it is difficult to secure the strength. Embodiments of the present disclosure solve this problem.

One aspect of the present disclosure provides embodiments of a drive device for an ice crushing device. Driving device for an ice crushing device according to an exemplary embodiment, the case; A motor disposed in the case; A drive shaft rotatably disposed in the case; And a plurality of gears sequentially engaged with each other to rotate the drive shaft at a rotational speed slower than that of the motor by transmitting rotational force from the motor to the drive shaft. The plurality of gears, at least one high speed gear formed of a first material; A transmission gear that rotates at a reduced speed than the high gear; And at least one low speed gear formed of a second material having a stronger strength than the first material and rotating at a reduced rotational speed than the transmission gear. The transmission gear is formed of the first material, the driven gear portion is coupled to any one of the at least one high speed gear to receive a rotational force; And a main gear part formed of the second material, coupled to the driven gear part to rotate integrally, and engaged with any one of the at least one low speed gear to transmit a rotational force.

Another aspect of the disclosure provides embodiments of a method of manufacturing a drive device for an ice crushing device. In the method of manufacturing a drive device for an ice crushing device according to an exemplary embodiment, the coarse gear portion includes a coupling portion for forming a projection projecting in the radially outward direction or a groove recessed in the radially inward direction about the rotation axis of the transmission gear. In addition, the driven gear portion includes a coupling corresponding portion fixed to the engaging portion. The manufacturing method includes injection molding the driven gear part in a state in which the main gear part is disposed at the center and engaging the main gear part.

In a method of manufacturing a drive device for an ice crushing device according to another exemplary embodiment, the at least one low speed gear includes an ending low speed gear that rotates integrally with the drive shaft. The ending low speed gear includes a plurality of protrusions protruding from the inner circumferential surface forming a hole through which the drive shaft passes, extending in the vertical direction, and spaced apart from each other along the circumferential direction. The drive shaft is pressed into the hole to contact the plurality of protrusions. The manufacturing method includes fixing the driving shaft and the ending low speed gear by pressing and deforming the outer circumferential surface of the press fitting part of the drive shaft into the hole of the ending low speed gear.

According to embodiments of the present disclosure, the high speed gear 300H to which a relatively small torque is applied is formed of a first material having a relatively high strength, and the low speed gear 300L to which a relatively large torque is applied is relatively strong. By forming a small second material, the weight of the drive device 10 can be reduced, the manufacturing cost of the drive device 10 can be reduced, and the operating noise of the drive device 10 can be reduced.

According to the embodiments of the present disclosure, both the high speed gear 300H and the driven gear part 331 which are engaged with each other are made of the first material, and the low speed gear 300L and the main gear part 333 that are engaged with each other are made of the second material. By doing so, it is possible to significantly reduce the possibility of abrasion of gears (gear of relatively weak material) which may occur as gears of different strengths are engaged with each other.

According to embodiments of the present disclosure, the driven gear unit may be more strongly coupled to the main gear unit.

According to embodiments of the present disclosure, the driving shaft and the ending low speed gear may be more strongly coupled.

1 is a perspective view of a drive device 10 for an ice crushing device according to an embodiment of the present disclosure.
FIG. 2 is a perspective view of the driving device 10 of FIG. 1 viewed from another direction.
3 is an exploded perspective view of the drive device 10 of FIG. 1.
4 is an exploded perspective view of the driving device 10 of FIG. 3 viewed from another direction.
FIG. 5 is an upper elevation view illustrating a state in which the plurality of gears 300 of FIG. 3 are engaged with each other.
6 is a cross-sectional view of the driving device 10 taken along the line S1-S1 ′ of FIG. 5.
7 is a top elevation view of the transmission gear 330 of FIG.
8 is a cross-sectional view of the transmission gear 330 of FIG. 7 taken along the line S2-S2 '.
9 is a cross-sectional view of the transmission gear 330 of FIG. 8 taken along the line S3-S3 '.
FIG. 10 is a top elevation view and a partial enlarged view of the ending low speed gear 350 of FIG. 3.
FIG. 11 is a cross-sectional view of the ending low speed gear 350 and the drive shaft 400 taken along the line S4-S4 ′ of FIG. 10, and FIG. 11A illustrates that the ending low speed gear 350 and the drive shaft 400 are separated from each other. 11 (b) shows a state in which the ending low speed gear 350 and the driving shaft 400 are coupled to each other.
12 is a cross-sectional view taken along the line S5-S5 'of the ending low speed gear 350 and the drive shaft 400 of FIG.
FIG. 13 is an upper elevation view of the base case 110 of FIG. 3.
14 is a bottom elevation view of the base case 110 of FIG. 13.
FIG. 15 is a partial cross-sectional view of the base case 110 of FIGS. 13 and 14 taken along a line S6-S6 '.
FIG. 16 is a top elevation view of the motor 200 of FIG. 3.
17A is a partial perspective view illustrating a state in which the case 100 and the motor 200 of FIG. 3 are disassembled from each other, and FIG. 17B is a partial perspective view illustrating a state in which the case 100 and the motor 200 of FIG. 3 are coupled to each other. to be.
18A and 18B are elevation views illustrating a coupling process between the first coupling part 231 of the motor 200 of FIGS. 17A and 17B and the first coupling counterpart 117A of the case 100.
19A and 19B are elevation views illustrating a coupling process between the second coupling part 232 of the motor 200 of FIGS. 17A and 17B and the second coupling counterpart 117B of the case 100.

Embodiments of the present disclosure are illustrated for the purpose of describing the technical spirit of the present disclosure. The scope of the present disclosure is not limited to the embodiments set forth below or the detailed description of these embodiments.

All technical and scientific terms used in the present disclosure, unless defined otherwise, have the meanings that are commonly understood by one of ordinary skill in the art to which this disclosure belongs. All terms used in the present disclosure are selected for the purpose of more clearly describing the present disclosure, and are not selected to limit the scope of the rights according to the present disclosure.

As used in this disclosure, expressions such as "comprising", "including", "having", and the like, are open terms that imply the possibility of including other embodiments unless otherwise stated in the phrase or sentence in which the expression is included. It should be understood as (open-ended terms).

As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

The expressions “first”, “second”, and the like used in the present disclosure are used to distinguish a plurality of components from each other, and do not limit the order or importance of the components.

In the present disclosure, the first axial direction X1 and the second axial direction X2 are defined as shown in the accompanying drawings, but this is for convenience of description of the driving device 10, and each direction may be defined differently. It may be.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. In the accompanying drawings, the same or corresponding components are given the same reference numerals. In addition, in the following description of the embodiments, it may be omitted to duplicate the same or corresponding components. However, even if the description of the component is omitted, it is not intended that such component is not included in any embodiment.

The ice crushing device (not shown) according to an embodiment of the present disclosure may be a device disposed in a refrigerator or an ice maker, or may be a separate device. The ice crushing device includes a crushing unit (not shown) configured to crush ice by rotation. The shredding portion may include a blade configured to press the ice by rotation. The average size of the ice particles crushed by the crusher may vary according to the rotational direction of the crusher. The ice crushing device includes a drive device 10 for rotating the crushing part. Hereinafter, the driving device 10 for an ice crushing device according to an embodiment of the present disclosure will be described in detail.

1 is a perspective view of a drive device 10 for an ice crushing device. FIG. 2 is a perspective view of the driving device 10 of FIG. 1 viewed from another direction. 1 and 2, the driving device 10 includes a case 100 forming an appearance. The case 100 includes a base case 110 and a cover case 130 that are coupled to each other. The case 100 includes a fastening member 150 for fastening the base case 110 and the cover case 130 to each other.

The cover case 130 is coupled in the first axial direction X1 of the base case 110. The base case 110 and the cover case 130 are combined to form an internal space.

The drive device 10 includes a motor 200. The motor 200 is disposed in the case 100. The motor 200 may be coupled to the base case 110. The motor 200 is coupled in the second axial direction X2 of the case 100. The motor 200 includes a power terminal 240 configured to receive power.

The drive device 10 includes a drive shaft 400 rotatably disposed in the case 100. The drive shaft 400 rotates about the rotation axis Op. The rotation axis Op extends along the axial directions X1 and X2. In the present disclosure, the axis of rotation Op is a virtual axis and does not refer to the actual part of the device.

The drive shaft 400 is configured to rotate the above-described crushing portion (not shown). The shredding part may be fixed to one end of the drive shaft 400. The second axial direction X2 end portion of the drive shaft 400 may protrude from the case 100, and the crushing portion may be fixed to the protruding second axial direction X2 end portion of the drive shaft 400. . The crushing part and the drive shaft 400 may rotate integrally.

In the present disclosure, that the first component "rotates" with the second component means that the first component and the second component rotate at the same rotational speed and the same direction of rotation about the same axis of rotation. Not only when the first component is coupled (or connected) to the second component and rotates together, but also the first component is coupled (or connected) to the third component and the third component is the second component. It is meant to include (or connected) to when the first component rotates with the second component.

The drive shaft 400 may penetrate the base case 110. The drive shaft 400 may pass through the cover case 130. The drive shaft 400 may be supported by the base case 110 and the cover case 130. The cover case 130 includes a ring rib 133r into which the distal end of the drive shaft 400 is inserted. The ring rib 133r protrudes in the first axial direction X1 and extends along the outer circumferential surface of the drive shaft 400.

The drive device 10 includes a bearing 600 interposed between the drive shaft 400 and the case 100. The bearing 600 includes a first bearing 600a interposed between the drive shaft 400 and the base case 110 and a second bearing 600b interposed between the drive shaft 400 and the cover case 130. Include. The second bearing 600b is disposed between the ring rib 133r and the drive shaft 400.

3 and 4, each configuration of the driving device 10 will be described in more detail as follows. 3 is an exploded perspective view of the driving device 10 of FIG. 1, and FIG. 4 is an exploded perspective view of the driving device 10 of FIG. 3 viewed from another direction.

The driving device 10 includes a case 100, a motor 200, a drive shaft 400, and a plurality of gears which rotate in engagement with each other so as to transmit rotational force from the motor 200 to the drive shaft 400. 300). The drive shaft 400 is disposed on the rotation axis Op of any one of the plurality of gears 300. The driving device 10 includes a plurality of gear shafts 500 disposed on the rotation shafts O1, O2, and O3 of the plurality of gears 300. The drive device 10 includes a bearing 600 that rotatably supports the drive shaft 400.

The motor 200 may be a brushless direct current (BLDC) motor. The motor 200 may operate by receiving a DC current. The motor 200 may be configured to enable forward and reverse rotation control and RPM control.

The motor 200 includes a shaft 210 that rotates about a rotation axis Om. The rotation axis Om extends along the axial directions X1 and X2. In this disclosure, the axis of rotation Om does not refer to the actual part of the device as a virtual axis. The shaft 210 of the motor protrudes in the first axial direction X1 along the rotation axis Om. One of the plurality of gears 310 is fixed to the shaft 210 of the motor.

The motor 200 includes a case 100 and a motor case 220 accommodating a rotor of the motor 200 therein. The stator of the motor 200 is fixed to the motor case 100. The power supply terminal 240 is disposed on one side of the motor case 220.

The motor 200 includes a coupling portion 230 coupled with the case 100. The coupling part 230 is disposed in the motor case 100. Coupling portion 230 may protrude in a direction away from the rotation axis (Om) in the motor case (100). The plurality of coupling parts 230 may be spaced apart from each other along the circumferential direction around the rotation axis Om.

The plurality of gears 300 are rotated by being sequentially engaged with each other by receiving the rotational force of the motor 200. The plurality of gears 300 rotate in engagement with each other so as to rotate the drive shaft 400 at a rotational speed slower than the shaft 210 of the motor by transmitting rotational force from the motor 200 to the drive shaft 400. . In this embodiment, the rotational speed of the gear receiving the rotational force is smaller than the rotational speed of the gear transmitting the rotational force of the two gears meshing with each other among the plurality of gears 300. The smaller the rotation speed of the plurality of gears 300, the greater the torque is received.

The plurality of gears 300 includes at least one high speed gear 300H, a transmission gear 330, and at least one low speed gear 300L. At least one high speed gear 300H receives a rotational force from the shaft 210 of the motor. The transmission gear 330 receives a rotational force from at least one high speed gear 300H. The at least one low speed gear 300L receives the rotational force from the transmission gear 330 and transmits the rotational force to the drive shaft 400.

The at least one high speed gear 300H includes a starting high speed gear 310 and an ending high speed gear 320. The starting high speed gear 310 rotates about the rotation axis Om of the motor. The starting high speed gear 310 is fixed to the shaft 210 of the motor and rotates integrally with the shaft 210 of the motor.

The ending high speed gear 320 rotates at a lower rotational speed than the starting high speed gear 310. The ending high speed gear 320 may be engaged with the starting high speed gear 310 to receive a rotational force. The ending high speed gear 320 rotates about the rotation axis O1. The rotating shaft O1 extends along the axial directions X1 and X2. In this disclosure, the axis of rotation O1 is a virtual axis and does not refer to the actual part of the device. In order to provide the function of the rotating shaft (O1), a gear shaft 510 may be provided on the rotating shaft (O1), the projection projecting along the rotating shaft (O1) and the groove is formed to rotatably engage the projection. May be

The transmission gear 330 rotates at a reduced rotational speed than the high speed gear 300H. The transmission gear 330 is engaged with the ending high speed gear 320 to receive the rotational force, and is engaged with the starting low speed gear 340 to transmit the rotational force. The transmission gear 330 rotates about the rotation axis O2. The rotating shaft O2 extends along the axial directions X1 and X2. In this disclosure, the axis of rotation O2 is a virtual axis and does not refer to the actual part of the device. In order to provide the function of the rotating shaft (O2), a gear shaft 520 may be provided on the rotating shaft (O2), the projection is formed along the rotating shaft (O2) and the groove is formed to rotatably engage the projection. May be

The transmission gear 330 includes a driven gear unit 331 receiving the rotational force and a main gear unit 333 transmitting the rotational force. The driven gear unit 331 is engaged with any one 320 of the at least one high speed gear 300H to receive a rotational force. The main gear unit 333 meshes with any one of the at least one low speed gear 300L 340 to transmit a rotational force. The main gear unit 333 rotates integrally with the driven gear unit 331.

At least one low speed gear 300L rotates at a reduced rotational speed than the transmission gear 330. At least one low gear 300L includes a starting low gear 340 and an ending low gear 350.

The starting low speed gear 340 is engaged with the transmission gear 330 to receive the rotational force. The starting low speed gear 340 rotates about the rotation axis O3. The rotation axis O3 extends along the axial directions X1 and X2. In the present disclosure, the axis of rotation O3 is a virtual axis and does not refer to the actual part of the device. In order to provide the function of the rotating shaft (O3), a gear shaft 530 disposed on the rotating shaft (O3) may be provided, and a protrusion protruding along the rotating shaft (O3) and a groove in which the protrusion is rotatably engaged. May be

The ending low speed gear 350 rotates at a slower rotation speed than the starting low speed gear 340. The ending low speed gear 350 rotates integrally with the drive shaft 400. The ending low speed gear 350 and the drive shaft 400 rotate about the rotation axis Op. The ending low speed gear 350 may be engaged with the starting low speed gear 340 to receive a rotational force.

The drive shaft 400 extends long along the axial directions X1 and X2. The drive shaft 400 penetrates the ending low speed gear 350. One end of the drive shaft 400 protrudes out of the case 100. The drive shaft 400 may be formed of a metal material such as steel.

Drive shaft 400 includes a rotational force transmission unit 410 is configured to be fixed to the crushing portion of the ice crushing device. The rotation force transmitting unit 410 may be formed at the distal end portion of the driving shaft 400 in the second axial direction X2. The rotation force transmitting unit 410 may be formed at an angle on a cross section that vertically crosses the rotation axis Op. The rotational force transmitting part 410 may include a fastening part 411 into which a fastening member such as a screw is inserted.

The drive shaft 400 includes a press-fit part 420 inserted into the hole 350h of the ending high speed gear 320. The press-fit part 420 is press-fitted to the ending high speed gear 320.

The drive shaft 400 includes a sliding portion 430 in sliding contact with the bearing 600. The sliding part 430 may include a first sliding part 431 in contact with the first bearing 600a and a second sliding part 432 in contact with the second bearing 600b. The press-fitting part 420 is disposed between the first sliding part 431 and the second sliding part 432.

The drive shaft 400 forms a ring groove 450 extending along the outer circumferential surface. The ring groove 450 is recessed in a direction closer to the rotation axis Op from the outer circumferential surface of the drive shaft 400. The ring groove 450 is disposed at one end of the second axial direction X2 of the press-fit part 420.

The gear shaft 500 is disposed on each of the rotation shafts O1, O2, and O3 of the gear 300. Both ends of the axial directions X1 and X2 of each gear shaft 500 are supported by the case 100. The gear shaft 500 may be formed of a metal material such as SUS material.

The plurality of gear shafts 500 may include a high speed gear shaft 510 disposed on the rotation shaft O1, a transmission gear shaft 520 disposed on the rotation shaft O2, and a low speed gear shaft 530 disposed on the rotation shaft O3. ). The high speed gear shaft 510 penetrates the ending high speed gear 320. The transmission gear shaft 520 penetrates the transmission gear 330. The low speed gear shaft 530 passes through the starting low speed gear 340.

The bearing 600 includes a first bearing 600a disposed in the second axial direction X2 about the ending low speed gear 350 and a second bearing 600b disposed in the first axial direction X1. . The first bearing 600a is inserted into the hole 113c of the case 100. The second bearing 600b is inserted into the hole 133b of the case 100. The bearing 600 may be formed of a resin material such as high strength plastic. The bearing 600 is fixed to the case 100.

The bearing 600 includes a cylindrical portion 610 forming a hole penetrating along the rotation axis Op. The cylindrical portion 610 forms an outer circumferential surface and an outer circumferential surface with respect to the rotation axis Op. The inner circumferential surface of the cylindrical portion 610 is in contact with the drive shaft 400.

The bearing 600 includes a locking portion 620 formed at one end of the cylindrical portion 610. The locking part 620 is locked to an inner side surface of the case 100 to prevent the bearing 600 from moving outside the case 100.

The bearing 600 is provided with a gap 630 spaced apart in the circumferential direction about the rotation axis Op. The gap 630 is formed to cross the cylindrical portion 610 and the locking portion 620. The tolerance according to the injection molding of the bearing 600 can be compensated by varying the separation distance of the gap 630, and the assembly of the bearing 600, the case 100, and the drive shaft 400 becomes convenient.

The case 100 includes a base case 110 including a base plate 111 and sidewalls 112. The base case 110 may be formed of a resin such as high strength plastic.

The base plate 111 may be formed in a plate shape. The base plate 111 is disposed on one side X2 of the plurality of gears 300. The base plate 111 is disposed across the drive shaft 400.

The side wall portion 112 extends along the circumference of the base plate 111. The side wall portion 112 protrudes from the base plate 111 in the first axial direction X1. The side wall portion 112 surrounds the plurality of gears 300.

The base case 110 includes a shaft support 113 for supporting one side of the shafts 510, 520, 530, and 400. Here, the shaft support part 113 may support the shaft fixedly, or may support the shaft rotatably. The shaft support 113 forms grooves or holes 113a, 113b, 113c, and 113d into which the shafts 510, 520, 530, and 400 are inserted.

The shaft support 113 includes at least one groove or hole 113a and 113b into which one side of the shafts 530 and 400 disposed on the rotation shafts O3 and Op of each of the at least one low speed gear 300L is inserted. First shaft support 113A is included. The shaft support part 113 includes a second shaft support part 113B which forms a groove or a hole 113c into which one side of the shaft 520 disposed on the rotation shaft O2 of the transmission gear 330 is inserted. The shaft support 113 includes a third shaft support 113C forming a groove or hole 113d into which one side of the shaft 510 of the ending high speed gear 320 is inserted. Here, one side of the shaft is a portion of the second axis direction X2 based on the plurality of gears 300.

The first shaft support 113A and the second shaft support 113B are formed in the base plate 111. The third shaft support part 113C is formed in the base plate 111.

At least one first shaft support portion 113A includes a low speed gear shaft support portion 113A1 that forms a groove or hole 113a into which one side portion of the shaft 530 disposed on the rotation shaft O3 of the starting low speed gear 340 is inserted. It includes. The at least one first shaft support 113A includes a drive shaft support 113A2 that forms a hole 113b through which one side of the drive shaft 400 penetrates. The first bearing 600a is inserted into the hole 113b of the drive shaft support 113A2.

In this embodiment, the low speed gear shaft support 113A1 forms the groove 113a, and the drive shaft support 113A2 forms the hole 113b. In the present embodiment, the second shaft support portion 113B forms the groove 113c, and the third shaft support portion 113C forms the groove 113d.

The base case 110 includes a reinforcement part 114 to reinforce the rigidity of the shaft support part 113. The reinforcement part 114 includes a plurality of ribs T and U that protrude in the axial directions X1 and X2 from the base plate 111. The plurality of ribs T, U includes radial ribs T extending in a direction away from the respective shaft supports 113A1, 113A2, 113B. The plurality of ribs T and U includes ring-shaped ribs U extending in the circumferential direction about the respective shaft supports 113A1 and 113A2.

The base case 110 includes a motor cover part 116 coupled to the motor 200. The motor cover part 116 includes an upper cover part 116a covering the first axial direction X1 of the motor 200. The motor cover part 116 includes a side cover part 116b that covers a part of an outer circumferential surface around the rotation axis Om of the motor 200.

The base case 110 includes a plurality of coupling counterparts 117 that couple with the plurality of coupling units 230 of the motor 200 to be described later. The plurality of coupling counterparts 117 may be formed in the side cover part 116b of the case 100.

The base case 110 includes a motor shaft through portion 118 that forms a hole through which the shaft 210 of the motor passes. The motor shaft through portion 118 is formed at the center of the upper cover portion 116a of the case 100.

The case 100 includes a cover case 130 that is coupled to the base case 110. The cover case 130 is formed in a plate shape crossing the axial directions X1 and X2. For example, the cover case 130 may be a pressed steel sheet.

The cover case 130 includes a corresponding support part 133 supporting the other side of the shafts 510, 520, 530, and 400. Here, the corresponding support part 133 may support the shaft fixedly, or may support the shaft rotatably. Corresponding support 133 forms grooves or holes 133a, 133b, 133c, 133d into which shafts 510, 520, 530, 400 are inserted.

The corresponding support part 133 includes at least one groove or hole 133a and 133b into which the other side of the shafts 530 and 400 disposed on the rotation shafts O3 and Op of each of the at least one low speed gear 300L is inserted. The first corresponding support 133A. The corresponding support part 133 includes a second corresponding support part 133B which forms a groove or hole 133c into which the other side of the shaft 520 disposed on the rotation shaft O2 of the transmission gear 330 is inserted. The corresponding support 133 includes a third corresponding support 133C forming a groove or hole 133d into which the other side of the shaft 510 of the ending high speed gear 320 is inserted. Here, the other side of the shaft is a portion of the first axial direction X1 based on the plurality of gears 300.

The first and second support parts 133A and 133B are formed in the cover case 130. The third corresponding support part 133C is formed on the base plate 111.

The at least one first corresponding support part 133A includes the low speed gear corresponding support part 133A1 which forms a groove or hole 133a into which the other side part of the shaft 530 disposed on the rotation axis O3 of the starting low speed gear 340 is inserted. ). The at least one first corresponding support part 133A includes a driving corresponding support part 133A2 which forms a hole 133b through which the other side of the drive shaft 400 penetrates. The second bearing 600b is inserted into the hole 133b of the drive corresponding support portion 133A2.

In this embodiment, the low speed gear corresponding support 133A1 forms the groove 133a, and the drive shaft support 133A2 forms the hole 133b. In this embodiment, the second corresponding support portion 133B forms the groove 133c, and the third corresponding support portion 133C forms the groove 133d.

The cover case 130 and the base case 110 are fastened to each other by a fastening member 150 such as a screw. The fastening member 150 passes through the fastening hole 139 of the cover case 130 and is fixed to the fastening part 119 of the base case 110.

5 and 6, the plurality of gears 300 will be described in detail as follows. FIG. 5 is an upper elevation view illustrating a state in which the plurality of gears 300 of FIG. 3 are engaged with each other. 6 is a cross-sectional view of the driving device 10 taken along the line S1-S1 ′ of FIG. 5.

The plurality of gears 300 may include at least one high speed gear 300H formed of a first material, at least one low speed gear 300L formed of a second material having a stronger strength than the first material, and a high speed gear ( And a transmission gear 330 for transmitting the rotational force of 300H to the low speed gear 300L.

The at least one high speed gear 300H includes a starting high speed gear 310 that rotates integrally with the shaft 210 of the motor. The at least one high speed gear 300H includes an ending high speed gear 320 that rotates in engagement with the driven gear 331 of the transmission gear 330. In the present embodiment, the ending high speed gear 320 rotates in direct engagement with the starting high speed gear 310, but in another embodiment, not shown, at least one high speed gear 300H is configured to rotate the starting force of the starting high speed gear 310 at high speed. It may further include at least one transmission high speed gear (not shown) for transmitting to the gear (320).

The ending high speed gear 320 includes a plurality of driven gear teeth 321 engaged with another gear 310 to receive rotational force, and a plurality of main gear teeth 323 engaged with another gear 330 to transmit rotational force. Include. The number of the plurality of driven gear teeth 323 is less than the number of the plurality of driven gear teeth 321. In the present embodiment, the plurality of driven gear teeth 323 is disposed in the second axial direction X2 with respect to the plurality of driven gear teeth 321, but may also be disposed in the first axial direction X1.

The transmission gear 330 includes a driven gear portion 331 engaged with a plurality of driving gear teeth 323 of the ending high speed gear 320. The transmission gear 330 includes a main gear portion 333 engaged with a plurality of driven gear teeth 341 of the starting low speed gear 340.

The number of gear teeth of the main gear part 333 is less than the number of gear teeth of the driven gear part 331. In this embodiment, the gear teeth of the main gear unit 333 are arranged in the first axial direction X1 relative to the gear teeth of the driven gear unit 331, but may also be arranged in the second axial direction X2.

The at least one low speed gear 300L includes a starting low speed gear 340 that meshes with and rotates with the main gear portion of the transmission gear 330. The at least one low speed gear 300L includes an ending low speed gear 350 that rotates integrally with the drive shaft 400. In this embodiment, the ending low speed gear 350 rotates in direct engagement with the starting low speed gear 340, but in another embodiment, not shown, at least one low speed gear 300L rotates the rotational force of the starting low speed gear 340. At least one transmission low speed gear (not shown) for transmitting to the gear 350 may be further included.

The starting low speed gear 340 has a plurality of driven gear teeth 341 engaged with the other gear 330 to receive rotational force, and a plurality of main gear teeth 343 engaged with the other gear 350 to transmit rotational force. Include. The number of the plurality of driven gear teeth 343 is less than the number of the plurality of driven gear teeth 341. In the present embodiment, the plurality of driven gear teeth 343 are arranged in the second axial direction X2 with respect to the plurality of driven gear teeth 341, but may also be arranged in the first axial direction X1.

The ending low speed gear 350 includes a plurality of gear teeth 355 engaged with other gears 340 to receive rotational force. The ending low speed gear 350 forms a hole 350h through which the drive shaft 400 passes. The ending low speed gear 350 includes a plurality of protrusions 351 formed on an inner circumferential surface that partitions the hole 350h. In this embodiment, the central portion 353 protrudes in the first axial direction X1 with respect to the disc portion 354, but may also protrude in the second axial direction X2.

7 to 9, the transmission gear 330 will be described in detail as follows. 7 is a top elevation view of the transmission gear 330 of FIG. 8 is a cross-sectional view of the transmission gear 330 of FIG. 7 taken along the line S2-S2 '. 9 is a cross-sectional view of the transmission gear 330 of FIG. 8 taken along the line S3-S3 '.

The driven gear part 331 of the transmission gear 330 is formed of the first material such as the material of the high speed gear 300H. The main gear part 333 of the transmission gear 330 is formed of the second material such as the material of the low speed gear 300L. The high speed gear 300H to which a relatively small torque is applied is formed of a first material having a relatively high strength, and the low speed gear 300L to which a relatively large torque is applied is formed of a second material having a small strength, The weight of the driving device 10 may be reduced, the manufacturing cost of the driving device 10 may be reduced, and operation noise of the driving device 10 may be reduced. That is, the strength of the first material may be greater than the strength of the second material. In addition, both the high speed gear 300H and the driven gear portion 331 which are engaged with each other are made of the first material, and the low speed gear 300L and the driven gear portion 333 which are engaged with each other are made of the second material, so that the strengths differ from each other. It can solve the wear problem of the gear (gear of relatively weak material) which can be caused by the meshing of the gears.

The first material may include a resin. For example, the first material may be a high strength plastic (SEP).

The second material may include a metal. For example, the second material may be a material obtained by sintering a metal powder.

The driven gear unit 331 includes a plurality of gear teeth 331a arranged along the circumferential direction of the first diameter about the rotation axis O2 of the transmission gear 330. The main gear unit 333 includes a plurality of gear teeth 333a arranged along the circumferential direction of the second diameter smaller than the first diameter about the rotation axis O2 of the transmission gear 330.

The main gear part 333 includes a coupling part 333b that forms a protrusion projecting in the radially outward direction or a groove recessed in the radially inward direction about the rotation axis O2 of the transmission gear 330. Here, the radially outward direction means a direction away from the rotation axis O2, and the radially inward direction means a direction approaching the rotation axis O2. The driven gear part 331 includes a coupling counterpart 331b that is engaged with and fixed to the coupling part 333b. The coupling part 333b and the coupling counterpart 331b prevent the main gear part 333 and the driven gear part 331 from rotating relative to the circumferential direction around the rotation axis O2.

The driven gear part 331 includes a cover part 331c which covers the upper side and the lower side of the coupling part 333b. Here, "upper" means the first axial direction X1 and "lower" means the second axial direction X2, but each direction may be defined differently according to a reference. The driven gear part 331 includes a first cover part 331c1 covering an upper surface of the coupling part 333b. The driven gear part 331 includes a second cover part 331c2 covering the lower side of the coupling part 333b. The cover gear 331c can prevent the main gear part 333 from being separated from the driven gear part 331 in the axial directions X1 and X2.

The driven gear portion 331 includes a peripheral portion 331d in which a plurality of gear teeth 331a are disposed on the outer circumference thereof. Coupling counterparts 331b are disposed on the inner circumference of the peripheral portion 331d.

The main gear part 333 forms the hole 333h through which the shaft 520 penetrates. The main gear part 333 includes the center part 333c in which the hole 333h is formed. The engaging portion 333b and the plurality of gear teeth 333a are disposed at the outer circumference of the central portion 333c. The coupling part 333b and the plurality of gear teeth 333a are disposed at different positions in the axial directions X1 and X2.

For example, the driven gear unit 331 may be injection molded in a state in which the main gear unit 333 is disposed at the center, and may be coupled to the main gear unit 333. As the driven gear 331 to be injection molded is cured, the driven gear 331 and the main gear 333 are coupled to each other. The manufacturing method of the drive device 10 for an ice crushing device may include the step of injection molding the driven gear part 331 in a state in which the main gear part 333 is disposed in the center, and coupling the driven gear part 333 with the main gear part 333. Can be. Through this, the main gear unit 333 and the driven gear unit 331 can be more strongly combined.

As another example, after the driven gear unit 331 and the main gear unit 333 are manufactured, the main gear unit 333 may be inserted into the center hole of the driven gear unit 331. In this case, the driven gear part 331 does not include the cover part 331c or only one of the first cover part 331c1 and the second cover part 331c2.

Referring to FIG. 10, the ending low speed gear 350 will be described in detail as follows. FIG. 10 is a top elevation view and a partial enlarged view of the ending low speed gear 350 of FIG. 3.

The ending low speed gear 350 includes a protrusion 351 protruding from an inner circumferential surface forming a hole 350h through which the driving shaft 400 penetrates. A plurality of protrusions 351 are configured. The plurality of protrusions 351 extend in the vertical direction. Here, "upper" means the first axial direction X1 and "lower" means the second axial direction X2, but each direction may be defined differently according to a reference. The plurality of protrusions 351 are spaced apart from each other along the circumferential direction around the rotation axis Op.

The ending low speed gear 350 includes a central portion 353 through which the rotating shaft Op passes, and a disc portion 354 formed at an edge of the central portion 353. The disc portion 354 is formed in a disc shape crossing the rotation axis Op. A plurality of gear teeth 355 are formed along the edge of the disc portion 354. The central portion 353 has a greater thickness in the axial directions X1 and X2 than the disc portion 354. A hole 350h extending along the rotation axis Op at the center of the central portion 353 is formed.

11 and 12, the coupling structure and coupling process of the ending low speed gear 350 and the drive shaft 400 will be described in detail as follows. FIG. 11 is a cross-sectional view of the ending low speed gear 350 and the drive shaft 400 taken along the line S4-S4 ′ of FIG. 10, and FIG. 11A illustrates that the ending low speed gear 350 and the drive shaft 400 are separated from each other. 11 (b) shows a state in which the ending low speed gear 350 and the driving shaft 400 are coupled to each other. 12 is a cross-sectional view taken along the line S5-S5 'of the ending low speed gear 350 and the drive shaft 400 of FIG.

The drive shaft 400 is pressed into the hole 350h of the ending low speed gear 350 to contact the plurality of protrusions 351. The indentation part 420 of the drive shaft 400 is in indentation contact with the plurality of protrusions 351. The drive shaft 400 is preferably formed of a third material having a weaker strength than the second material, which is a material of the ending low speed gear 350. For example, the drive shaft may be formed of steel material SM45C.

The indentation part 420 of the drive shaft 400 is deformed according to the indentation so as to be engaged with and fixed to the plurality of protrusions 351. The distance between the outer circumferential surface of the press-fit part 420 and the rotational axis Op is greater than the distance between the outer circumferential surface of the other portion of the drive shaft 400 and the rotational axis Op.

The manufacturing method of the drive device 10 for ice crushing apparatus drives the outer peripheral surface of the press-fit part 420 of the drive shaft 400 by pressing it into the hole 350h of the ending low-speed gear 350, and deforming it, And securing the ending low speed gear 350. For example, the driving shaft 400 may be inserted into the hole 350h of the ending low speed gear 350 in the direction of the arrow of FIG. 11A.

13 to 15, the reinforcement part 114 of the case 100 will be described in detail as follows. FIG. 13 is an upper elevation view of the base case 110 of FIG. 3. 14 is a bottom elevation view of the base case 110 of FIG. 13. FIG. 15 is a partial cross-sectional view of the base case 110 of FIGS. 13 and 14 taken along a line S6-S6 '.

The reinforcement 114 includes at least one low speed gear support reinforcement 114A for reinforcing the rigidity of the at least one first shaft support 113A, and a transmission gear support reinforcement for reinforcing the rigidity of the second shaft support 113B. Section 114B. The at least one low speed gear support reinforcement 114A includes a starting low speed gear support reinforcement 114A1 for reinforcing the rigidity of the low speed gear shaft support 113A1 and a drive shaft support reinforcement for reinforcing the rigidity of the drive shaft support 113A2. Section 114A2.

The low speed gear support reinforcement 114A includes a plurality of radial ribs T1, T2 extending radially outward about each of the at least one first shaft support 113A1, 113A2. The starting low speed gear support reinforcement 114A1 includes a plurality of radial ribs T1 extending radially outward about the low speed gear shaft support 113A1. The drive shaft support reinforcement 114A2 includes a plurality of radial ribs T2 extending radially outward about the drive shaft support 113A2. The transmission gear support reinforcement 114B includes a plurality of radial ribs T3 extending radially outward about the second shaft support 113B.

The number of radial ribs (any one of T1 and T2) of any one of the at least one low speed gear support reinforcement 114A1, 114A2 is either radial of the transmission gear support reinforcement 114B. More than the number of ribs T3. This makes it possible to reinforce the stiffness even more at the part supporting the shaft to which greater torque is applied. In this embodiment, the number of radial ribs T1 is eight, the radial ribs T2 are eight, and the number of radial ribs T3 is four.

Each of the at least one low speed gear support reinforcement 114A1, 114A2 is a ring spaced radially outwardly and extending in a circumferential direction from a corresponding first shaft support of the at least one first shaft support 113A1, 113A2. Type ribs U1 and U2 are included. The starting low speed gear support reinforcement 114A1 includes a ring-shaped rib U1 spaced radially outward from the low speed gear shaft support 113A1 and extending in the circumferential direction. The drive shaft support reinforcement 114A2 includes a ring-shaped rib U2 spaced radially outward from the drive shaft support 113A2 and extending in the circumferential direction.

Each of the radial ribs T1 and T2 of the low speed gear support reinforcement 114A1 and 114A2 and the radial rib T3 of the transmission gear support reinforcement 114B is inward of the case 100 from the base plate 111. Protruding inner protrusions T1i, T2i, T3i. Each of the radial ribs T1, T2, and T3 has an outer protrusion T1o, T2o, and T3o protruding outward of the case 100 at a position corresponding to the inner protrusions T1i, T2i, and T3i of the base plate 111. ).

Each of the ring-shaped ribs U1 and U2 of the low speed gear support reinforcement portions 114A1 and 114A2 and the ring-shaped rib U3 of the transmission gear support reinforcement portion 114B moves from the base plate 111 to the inside of the case 100. Protruding inner protrusions U1i, U2i, U3i. Each of the ring-shaped ribs U1, U2, U3 is an outer protrusion U1o, U2o, U3o protruding out of the case 100 at a position corresponding to the inner protrusions U1i, U2i, U3i of the base plate 111. ).

Referring to FIGS. 16, 17A and 17B, the coupling structure and coupling process of the case 100 and the motor 200 will be described in detail as follows. FIG. 16 is a top elevation view of the motor 200 of FIG. 3. 17A is a partial perspective view illustrating a state in which the case 100 and the motor 200 are disassembled from each other. 17B is a partial perspective view illustrating a state in which the case 100 and the motor 200 are coupled to each other.

The plurality of coupling parts 230 of the motor 200 protrude in a radially outward direction about the shaft 210 of the motor. The plurality of coupling parts 230 are spaced apart from each other along the circumferential directions Dc1 and Dc2. The plurality of coupling parts 230 may include a first coupling part 231 and a second coupling part 232. A plurality of second coupling parts 232 may be configured. In the present embodiment, one first coupling portion 231 and three second coupling portions 232 are spaced apart from each other at regular intervals along the circumferential directions Dc1 and Dc2.

The circumferential directions Dc1 and Dc1 include a first direction Dc1 and a second direction Dc2 different from the first direction Dc1. The first direction Dc1 is defined as one of a clockwise direction and a counterclockwise direction when viewed in the first axial direction X1, and the second direction Dc2 is defined as a direction opposite to the first direction Dc2. do.

The plurality of coupling counterparts 117 of the case 100 are configured to correspond to the plurality of coupling parts 230. The plurality of coupling counterparts 117 correspond one-to-one with the plurality of coupling parts 230.

The plurality of coupling counterparts 117 may include a first coupling counterpart 117A and a second coupling counterpart 117B. A plurality of second coupling counterparts 117B may be configured. In this embodiment, one first coupling counterpart 117A and three second coupling counterparts 117B are spaced apart from each other along the circumferential directions Dc1 and Dc2.

The plurality of coupling counterparts 117 form a plurality of insertion grooves 117a and 117p into which the plurality of coupling units 230 are inserted. Each of the plurality of insertion grooves 117a and 117p is formed to be inserted in the second direction Dc2 after the corresponding coupling portion 230 is inserted in the upper direction X1. Through this, the motor 200 may be conveniently coupled to the case 100.

In describing the coupling part 230 and the coupling counterpart 117, "upper" means the first axial direction X1 and "lower" means the second axial direction X2, Orientations can be defined differently.

Each of the plurality of insertion grooves 117a and 117p forms an opening in the downward direction X2 and forms axial grooves 117a1 and 117p1 extending in the vertical directions X1 and X2. Each of the plurality of insertion grooves 117a and 117p includes circumferential grooves 117a2 and 117p2 extending in the circumferential directions Dc1 and Dc2 at upper portions of the axial grooves 117a1 and 117p1. The insertion groove 117a includes an axial groove 117a1 and a circumferential groove 117a2, and the insertion groove 117p includes an axial groove 117p1 and a circumferential groove 117p2.

Each of the coupling counterparts 117A and 117B includes locking parts 117b and 117q to which lower surfaces of the corresponding coupling parts 231 and 233 are engaged. The first coupling counterpart 117A includes a locking part 117b to which the lower side of the corresponding first coupling part 231 is engaged. The second coupling counterpart 117B includes a locking part 117q to which the lower side of the corresponding second coupling part 233 is engaged.

Only some of the coupling counterparts 117A of the plurality of coupling counterparts 117A and 117B include a hook part 117c to which one side circumferential side of the corresponding coupling part 231 is engaged. The side of the first direction Dc1 of the first coupling part 231 is engaged with the hook part 117c of the first coupling counterpart 117A. In addition, the circumferential grooves 117a2 and 117p2 of each of the coupling counterparts 117A and 117B extend in the second direction Dc2 from the axial grooves 117a1 and 117p1. In this way, the motor 200 and the case 100 may be hook-coupled by rotating the motor 200 in the second direction Dc2.

The hook portion 117c of the first coupling counterpart 117A protrudes upward from the distal end of the first direction Dc1 of the locking portion 117b. The first coupling counterpart 117A includes an extension part 117d extending from the locking part 117b in the second direction Dc2. The extension part 117d extends by connecting the motor cover part 116 and the locking part 117b. The extension part 117d supports the locking part 117b. The vertical thickness of the extension portion 117d is smaller than the vertical thickness of the locking portion 117b. The width of the cross section of the extension portion 117d is smaller than the width of the cross section of the locking portion 117b.

The second coupling counterpart 117B includes an outer portion 117r disposed in the radially outward direction of the locking portion 117q. The outer portion 117r is disposed in the radially outward direction of the circumferential groove 117p2. The outer portion 117r extends while connecting the motor cover portion 116 and the locking portion 117q in the axial directions X1 and X2.

Referring to FIGS. 18A and 18B, a process of coupling the first coupling part 231 of the motor 200 and the first coupling counterpart 117A of the case 100 will be described below. 18A and 18B are elevation views illustrating a coupling process between the first coupling part 231 of the motor 200 of FIGS. 17A and 17B and the first coupling counterpart 117A of the case 100. FIG. 18A illustrates a state in which the first coupling part 231 is inserted in the first axial direction X1 with respect to the first coupling counterpart 117A, and FIG. 18B illustrates the first coupling counterpart in the state of FIG. 18A. The first coupling part 231 is rotated in the second direction Dc2 with respect to 117A.

Referring to FIG. 18A, when the motor 200 moves to the upper side X1 to approach the case 100, the first coupling part 231 is an axial groove 117a1 of the first coupling counterpart 117A. Is inserted. When the first coupling portion 231 further moves to the upper side X1, the first coupling portion 231 contacts a portion that restricts the upper end of the axial groove 117a1.

Referring to FIG. 18B, when the first coupling part 231 contacts the upper end of the axial groove 117a1, the motor 200 is rotated in the second direction Dc2 with respect to the case 100. The first coupling portion 231 is inserted into the circumferential groove 117a2 of the first coupling corresponding portion 117A. When the first coupling part 231 further moves in the second direction Dc2, the lower surface of the first coupling part 231 contacts the locking part 117b of the first coupling corresponding part 117A, and the first The side surface of the first direction Dc1 of the coupling portion 231 contacts the hook portion 117c of the first coupling counterpart 117A and is engaged.

Referring to FIGS. 19A and 19B, a process of coupling the second coupling part 232 of the motor 200 and the second coupling counterpart 117B of the case 100 will be described below. 19A and 19B are elevation views illustrating a coupling process between the second coupling part 232 of the motor 200 of FIGS. 17A and 17B and the second coupling counterpart 117B of the case 100. FIG. 19A illustrates a state in which the second coupling part 232 is inserted in the first axial direction X1 with respect to the first coupling counterpart 117B, and FIG. 19B illustrates a second coupling counterpart in the state of FIG. The second coupling part 232 is rotated in the second direction Dc2 with respect to 117B.

Referring to FIG. 19A, when the motor 200 moves to the upper side X1 to approach the case 100, the second coupling part 232 is an axial groove 117p1 of the second coupling counterpart 117B. Is inserted. If the second coupling portion 232 further moves to the upper side X1, the second coupling portion 232 contacts a portion that restricts the upper end of the axial groove 117p1.

Referring to FIG. 19B, when the second coupling part 232 is in contact with the upper end of the axial groove 117p1, the motor 200 is rotated in the second direction Dc2 with respect to the case 100. The second coupling portion 232 is inserted into the circumferential groove 117p2 of the second coupling counterpart 117B. When the second coupling part 232 further moves in the second direction Dc2, the lower surface of the second coupling part 232 contacts the locking part 117q of the second coupling counterpart 117B. When the motor 200 is rotated in the second direction Dc2 with respect to the case 100, the second coupling part 232 is slid along the upper side of the locking part 117q without being caught in a configuration such as a hook.

Although the technical spirit of the present disclosure has been described with reference to some embodiments and the examples shown in the accompanying drawings, the technical spirit and scope of the present disclosure may be understood by those skilled in the art. It will be appreciated that various substitutions, modifications, and alterations can be made in the scope. Also, such substitutions, modifications and variations are intended to be included within the scope of the appended claims.

DESCRIPTION OF SYMBOLS 10 Drive device 100 Case 113 Shaft support part 114 Reinforcement part 117 Coupling correspondence part of case 133 Corresponding support part 200 Motor 230 Coupling part of motor 300 A plurality of gears 300H At least one high gear, 310: starting high gear, 320: Ending high speed gear, 330: transmission gear, 331: driven gear part, 333: main gear part, 300L: at least one low speed gear, 340: starting low speed gear, 350: ending low speed gear, 400: drive shaft, 500: gear shaft 600: bearing

Claims (20)

case;
A motor disposed in the case;
A drive shaft rotatably disposed in the case; And
A plurality of gears sequentially engaged with each other to rotate to transmit the rotational force from the motor to the drive shaft to rotate the drive shaft at a rotational speed slower than the axis of the motor,
The plurality of gears,
At least one high speed gear formed of a first material;
A transmission gear that rotates at a reduced speed than the high gear; And
It is formed of a second material having a stronger strength than the first material, and comprises at least one low speed gear that rotates at a reduced rotational speed than the transmission gear,
The transmission gear,
A driven gear part formed of the first material and configured to receive a rotational force by engaging any one of the at least one high speed gears; And
It is formed of the second material, coupled to the driven gear unit and integrally rotates, including a main gear unit for transmitting a rotational force in engagement with any one of the at least one low speed gear,
Drive for ice crushing device. The method of claim 1,
The driven gear part includes a plurality of gear teeth arranged along the circumferential direction of the first diameter about the rotation axis of the transmission gear,
The main gear unit includes a plurality of gear teeth arranged along the circumferential direction of the second diameter smaller than the first diameter about the rotation axis of the transmission gear,
Drive for ice crushing device. The method of claim 2,
The main gear part includes a coupling part for forming a projection projecting in the radially outward direction or a groove recessed in the radially inward direction about the rotation axis of the transmission gear,
The driven gear portion includes a mating correspondence portion engaged with the engaging portion,
Drive for ice crushing device. The method of claim 3,
The driven gear part includes a cover part covering an upper side and a lower side of the coupling part.
Drive for ice crushing device. The method of claim 3,
The driven gear portion is injection molded in the state in which the main gear portion is disposed in the center to engage with the main gear portion,
Drive for ice crushing device. The method of claim 1,
The first material comprises a resin,
The second material comprises a metal,
Drive for ice crushing device. The method of claim 1,
The at least one high speed gear,
A starting high speed gear that rotates integrally with the shaft of the motor; And
And an ending high speed gear that meshes with the driven gear portion and rotates at a lower rotational speed than the starting high speed gear.
Drive for ice crushing device. The method of claim 7, wherein
The at least one low speed gear,
A starting low speed gear engaged with the main gear part and rotating; And
And an ending low speed gear that integrally rotates with the drive shaft and that rotates at a reduced speed than the starting low speed gear,
Drive for ice crushing device. The method of claim 1,
The case,
At least one first shaft support forming a groove or a hole into which one side of a shaft disposed on a rotation shaft of each of the at least one low speed gear is inserted;
A second shaft support part defining a groove or a hole into which one side of the shaft disposed on the rotation shaft of the transmission gear is inserted;
At least one low speed gear support reinforcement having a plurality of radial ribs extending radially outward about each of said at least one first shaft support; And
And a transmission gear support reinforcement having a plurality of radial ribs extending radially outward about the second shaft support.
Drive for ice crushing device. The method of claim 9,
Wherein the number of the radial ribs of any one of the at least one low speed gear support reinforcement is greater than the number of the radial ribs of the transmission gear support reinforcement,
Drive for ice crushing device. The method of claim 9,
Each of the at least one low speed gear support reinforcement comprising a ring-shaped rib that is spaced radially outwardly from the corresponding first shaft support of the at least one first shaft support and extends in a circumferential direction;
Drive for ice crushing device. The method of claim 9,
The case includes a plate-shaped base plate formed with the first shaft support and the second shaft support,
Each of the radial ribs of the low speed gear support reinforcement and the radial ribs of the transmission gear support reinforcement,
An inner protrusion protruding inwardly of the case from the base plate; And
It includes an outer protrusion protruding to the outside of the case at a position corresponding to the inner protrusion of the base plate,
Drive for ice crushing device. The method of claim 9,
The at least one low speed gear,
A starting low speed gear engaged with the main gear part and rotating; And
An end slow gear that rotates integrally with the drive shaft and rotates at a reduced speed than the starting low gear,
The at least one first shaft support portion,
A low speed gear shaft support forming a groove or a hole into which one side of the shaft disposed on the rotating shaft of the starting low speed gear is inserted; And
It includes a drive shaft support for forming a hole through which one side of the drive shaft passes,
Drive for ice crushing device. The method of claim 1,
The motor includes a plurality of coupling portions projecting radially outwardly about the axis of the motor and spaced apart from each other along the circumferential direction,
The case includes a plurality of coupling counterparts forming a plurality of insertion grooves into which the plurality of coupling parts of the motor are inserted.
Each of the plurality of engagement counterparts of the case includes a locking portion to which the lower side of the corresponding engagement portion of the motor is engaged.
Only a coupling counterpart of a part of the plurality of coupling counterparts of the case, the hook includes a hook portion that is engaged with the circumferential side surface of the corresponding coupling part of the motor,
Drive for ice crushing device. The method of claim 14,
Each of the plurality of insertion grooves,
An axial groove forming an opening in the downward direction and extending in the vertical direction; And
A circumferential groove extending in the circumferential direction from an upper side of the axial groove,
The circumferential direction includes a first direction and a second direction different from the first direction, and the hook portion is engaged with a first direction side surface of any one of the coupling parts of the motor, and the circumferential groove is the axial direction. Extending in the second direction from the groove,
Drive for ice crushing device. The method of claim 14,
Each of the plurality of insertion grooves is formed to be inserted in the second direction after the corresponding coupling portion of the motor is inserted in the upward direction,
Drive for ice crushing device. The method of claim 1,
The at least one low speed gear includes an ending low speed gear that rotates integrally with the drive shaft,
The ending low speed gear includes a plurality of protrusions protruding from the inner circumferential surface forming a hole through which the drive shaft passes, extending in the vertical direction, and spaced apart from each other along the circumferential direction,
The drive shaft is pressed into the hole and in contact with the plurality of protrusions,
Drive for ice crushing device. The method of claim 17,
The drive shaft is formed of a third material having a weaker strength than the second material,
Drive for ice crushing device. In the manufacturing method of the drive device for ice crushing apparatus according to claim 3,
And injection molding the driven gear part in a state in which the main gear part is disposed at the center, and coupling the driven gear part to the main gear part.
The manufacturing method of the drive device for ice crushing apparatus. In the manufacturing method of the drive device for ice crushing apparatus of Claim 17,
Fixing the driving shaft and the ending low speed gear by pressing and deforming the outer circumferential surface of the press fitting part of the drive shaft into the hole of the ending low speed gear,
The manufacturing method of the drive device for ice crushing apparatus.

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