JP5788700B2 - Motor and ice making device - Google Patents

Description

  The present invention relates to a motor that rotates a drive shaft via a speed reduction mechanism, for example, and an ice making device that uses this motor.

  Conventionally, in an ice making apparatus for business use, as disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-224215, an ice making chamber having a large number of ice making chambers is held almost horizontally so as to face the ice making chamber during ice making. Next, place a water pan below the ice making chamber. Further, water is jetted from the nozzles provided in the water dish to each ice making chamber of the ice making chamber, and ice blocks are generated in each ice making chamber. Thereafter, the water tray is retracted, the ice making chamber is heated, and the ice blocks in the ice making chamber are dropped into the ice storage chamber. In this type of ice making device, one end of the ice making chamber is supported by a rotating shaft, and the water dish is rotated by energizing by a spring and moving the other end up and down by a cam, thereby making the ice making chamber during ice making. A water tray is held below the ice making chamber so as to face the surface of the ice making chamber, and when the ice block is discharged into the ice storage chamber, the water tray is inclined at an angle so as not to prevent the discharge of the ice block.

  Japanese Patent Application Laid-Open No. 2007-147201 proposes a device for a motor used to move the water tray. That is, FIG. 8 is a front view and a side view showing the motor disclosed in Japanese Patent Laid-Open No. 2007-147201. The motor 1 drives the drive shaft 4 by reducing the rotational shaft output of the motor body 2, which is a brushless motor, for example, by the speed reducer 3. In the ice making device, the drive shaft 4 is provided with a cam, and the drive shaft 4 rotates approximately half in the forward and reverse directions to rotate the water tray.

  In the motor 1, a lever 5 is provided at the base of the drive shaft 4, and a magnet 6 is provided at the tip of the lever 5. Further, a wiring board 7 is provided on the end face on the lever 5 side of the speed reducer 3, and Hall elements 8 and 9 for detecting a magnetic field by the magnet 6 are provided at predetermined positions of the wiring board 7. Here, the Hall elements 8 and 9 are provided at positions corresponding to the water trays when making ice and discharging ice blocks to the ice storage chamber. As a result, the motor 1 detects the magnetic field of the magnet 6 by the Hall elements 8 and 9 to control the driving of the motor body 2, and the range by the two Hall elements 8 and 9 is set as the rotation range of the drive shaft 4. And drive the ice making cam. Note that stoppers 10 and 11 that abut against the lever 5 and limit the rotation of the drive shaft 4 are provided on the end surface of the speed reducer 3 on the lever 5 side.

JP 2008-224215 A JP 2007-147201 A

  In the motor 1 shown in FIG. 8, a lever 5 is provided at the base of the drive shaft 4, and the magnetic field of the magnet 6 provided at the tip of the lever 5 is detected by the Hall elements 8 and 9. There is a problem that the dimension in the direction to be increased. When the dimension in the extending direction of the drive shaft 4 is large in this way, it is difficult to reduce the dimension in the corresponding direction in the apparatus in which the motor 1 is incorporated. It becomes difficult to make it.

  In addition, since the rotational position of the drive shaft 4 is detected by the lever 5, the magnet 6, the wiring board 7, and the Hall elements 8 and 9 provided on the base side of the drive shaft 4, the reliability of these configurations is considered. However, there are still insufficient problems in practical use.

  The present invention solves these problems, makes it possible to shorten the length of the drive shaft in the extension direction as compared with the prior art, and further improves the reliability as compared with the conventional motor, and this motor We propose an ice making device using

  The present invention relates to a motor that drives the drive shaft provided in the speed reducer by reducing the rotational speed of the rotating shaft of the motor body by a speed reducer that is integrally held with the motor body. The rotational speed of the rotary shaft is reduced by a plurality of gears to drive the drive shaft, and the motor has a sensor space inside a case for holding the plurality of gears, A magnet is attached to the tip, a lever attached to the drive shaft, and a hall element that detects the rotational position of the drive shaft by detecting the magnetic field of the magnet.

  According to the present invention, a lever and a hall element are provided in the sensor space provided in the case, and the configuration for detecting the rotational position of the drive shaft is provided in the sensor space. Compared with the case where it is provided outside the machine, the length of the drive shaft in the extending direction can be shortened, and further the reliability can be improved.

  Furthermore, the present invention is the above-described reduction gear, wherein the plurality of gears are a plurality of composite gears in which a small-diameter spur gear and a large-diameter spur gear are integrated on an axis parallel to the rotation axis of the motor body. The plurality of composite gears drives the drive shaft by sequentially reducing the rotational speed of the rotation shaft of the motor body, and the plurality of composite gears each have a large diameter side on the motor body side. As the rotational speed decreases, the sensor space is sequentially disposed away from the motor body side in the axial direction, and the sensor space is provided at the motor body side end of the drive shaft.

  According to the present invention, it is possible to secure a space for providing a sensor space inside the speed reducer due to the arrangement of the gears, thereby effectively avoiding an increase in size by effectively using the internal space of the speed reducer. In the above, the length of the drive shaft in the extending direction can be shortened as compared with the conventional case, and the reliability can be improved.

  In the present invention, the drive shaft is provided with a direction indicator that displays a rotational position of the drive shaft.

  According to the present invention, a configuration for detecting the rotational position of the drive shaft is provided in the sensor space inside the speed reducer, and even if this configuration cannot be seen from the outside, it is driven by the direction indicator. The rotational position of the shaft can be seen, thereby effectively avoiding a reduction in assembly work efficiency.

  Further, according to the present invention, the case is provided with a gear cover that partitions the plurality of gears and the motor main body, and the gear cover has a recess formed in a portion of the drive shaft, and the recess is a sensor space. Assigned to.

  According to the present invention, the sensor space can be configured by effectively using the configuration of the gear cover.

  The present invention also holds the water tray so as to face the ice making chamber, and supplies water from the water tray to each of the plurality of ice making chambers provided in the ice making chamber to form ice blocks in the ice making chamber. At the same time, in the ice making apparatus for separating the water dish from the ice making chamber and dropping the ice block created in the ice making chamber, the claim 1, claim 2, claim 4, claim 5 or claim 5 The water tray is moved by any one of the motors.

  According to the present invention, in the motor, the length of the drive shaft in the extension direction can be shortened as compared with the conventional motor, and the reliability can be improved as compared with the conventional motor. In the ice making device to be used, the size of the motor drive shaft in the extending direction can be reduced and the reliability can be improved.

  According to the present invention, the length of the drive shaft in the extending direction can be shortened as compared with the conventional case, and the reliability can be improved as compared with the conventional case.

It is a figure which shows the ice making apparatus which concerns on the 1st Embodiment of this invention. FIG. 2 is a front view showing an ice making mechanism during ice making in the ice making device of FIG. 1. FIG. 2 is a front view showing an ice making mechanism in the ice making device of FIG. 1 when discharging ice pieces made into ice storage chambers. It is a figure which shows the actuator motor of the ice making apparatus of FIG. It is sectional drawing of the actuator motor of the ice making apparatus of FIG. FIG. 2 is a front view showing the position of an arm during ice making in the ice making device of FIG. 1. FIG. 2 is a front view showing the position of an arm when discharging ice blocks to the ice storage chamber in the ice making device of FIG. 1. It is a figure which shows the motor of the conventional ice making apparatus.

  Embodiments of the present invention will be described below with reference to the drawings.

[Ice making equipment]
FIG. 1 is a perspective view showing an ice making device according to a first embodiment of the present invention. In FIG. 1, the ice making device 21 is shown with the ceiling side cover removed. Here, the ice making device 21 is a commercial ice making device, and a housing 22 is formed in a substantially box shape, and a compressor or the like is housed in the lower portion of the housing 22. The ice making device 21 is provided with a door 23 that opens and closes when the created ice block is taken out, and an ice storage chamber 24 that stores the ice block behind the door 23. An ice making mechanism 25 is provided on the ice storage chamber 24 to prepare ice blocks.

  Here, the ice making mechanism 25 is held on the ice storage chamber 24 by the mounting frame 26, generates an ice block, a water tray 28 for supplying ice making water to the ice making chamber 27, and a water tray 28 for ice making. A pump motor 29 for supplying water, an ice making water tank 30 for accumulating ice-making water supplied by the pump motor 29, an actuator motor 32 for moving the water tray 28, and the like are provided.

  2 and 3 are front views showing the ice making mechanism 25 at the time of ice making and at the time of discharging ice pieces made into ice storage chamber 24, respectively. In the ice making mechanism 25, the ice making chamber 27 is provided with a partition plate in a lattice shape, and an ice making chamber having an opening on the ice storage chamber 24 side is provided in a grid shape by the partition plate. The ice making chamber 27 is provided with an evaporator for cooling and heating the partition plate. During ice making (FIG. 2), the ice making mechanism 25 holds a water tray 28 below the ice making chamber 27 so as to face the ice making chamber 27, and each of the water trays 28 is used for making ice in the corresponding ice making chamber. A nozzle for injecting water is provided. The ice making mechanism 25 supplies the ice making water held in the ice making water tank 30 to the nozzle of the water tray 28 by the pump motor 29, and the ice making water is supplied from the nozzle to the ice making chamber 27. As a result, ice blocks are generated in the ice making chamber of the ice making chamber 27. When the ice block is generated (FIG. 3), the water tray 28 is retracted to the retracted position, the partition plate of the ice making chamber 27 is heated, and the generated ice block is dropped into the ice storage chamber 24.

  In the ice making device 21, one end of the water tray 28 is held on the mounting frame 26 by a rotating shaft, and thereby the water tray 28 is rotatably held on the mounting frame 26. In the ice making device 21, the other end of the water tray 28 is connected to the tip of a cam 35 via a coil spring 34, and the cam 35 is driven by an actuator motor 32, whereby the water tray 28 is moved by the actuator motor 32. To do. Specifically, at the time of ice making, the tip of the cam 35 is moved upward by the actuator motor 32, whereby the other end of the water tray 28 is pulled up by the coil spring 34, and the lower side of the ice making chamber 27 is opposed to the ice making chamber 27. The water tray 28 is held in the container (FIG. 2). Further, when discharging the ice pieces to the ice storage chamber 24, the tip of the cam 35 is moved downward by the actuator motor 32 (FIG. 3), and the other end of the water tray 28 is pushed down by the coil spring 34. Accordingly, the water tray 28 is held so as to be inclined with respect to the ice making chamber 27 so as not to prevent the ice block from dropping from the ice making chamber 27 to the ice storage chamber 24.

[Actuator motor]
FIG. 4 is a front view and a side view showing the actuator motor 32. The actuator motor 32 decelerates the rotation speed of the rotation shaft of the motor main body 42 by a reduction gear 43 held integrally with the motor main body 42 and drives a drive shaft 44 provided in the reduction gear 43. In the ice making device 21, a cam 35 is provided on the drive shaft 44, and the drive shaft 44 rotates about half a forward and reverse direction to rotate the water tray 28. Here, the motor main body 42 is, for example, a brushless motor.

  Therefore, in the actuator motor 32, the speed reducer 43 is provided with a plurality of gears for speed reduction as shown in FIG. Here, FIG. 5 is a diagram showing a section taken along a broken line connecting the centers of the rotation axes between the rotation shaft 47 and the drive shaft 44 of the motor main body 42 in the order of transmission of the driving force, and FIG. It is a figure which shows the structure of the gearwheel concerning the speed-reduction mechanism cut out and shown by XX. The reduction gear 43 is a plurality of composite gears in which a small-diameter spur gear and a large-diameter spur gear are integrated on an axis parallel to the rotation axis of the motor body 42, and a plurality of composite gears having different rotation axes. Is provided. That is, in the speed reducer 43, a small diameter spur gear 48 is provided on the rotation shaft 47 of the motor body 42, and the rotation speed of the rotation shaft 47 is reduced by a large diameter spur gear 49 that meshes with the spur gear 48. Further, the speed reducer 43 is formed by integrally forming a small diameter spur gear 50 on the large diameter spur gear 49 to form a first synthetic gear, and is rotated by a large diameter spur gear 51 meshing with the small diameter spur gear 50. The rotational speed of the shaft 47 is further reduced. In the reduction gear 43, a small synthetic spur gear 52 is integrally provided on the large spur gear 51 to form a second synthetic gear, and a large spur gear 53 that meshes with the small spur gear 52 is provided. It is done. Further, in the speed reducer 43, a small-diameter spur gear 54 is integrally provided on the large-diameter spur gear 53 to form a third synthetic gear, and a large-diameter spur gear 55 meshing with the small-diameter spur gear 54 is provided. Provided on the drive shaft 44. As a result, the speed reducer 43 reduces the rotational speed in four stages using the parallel shaft spur gears 48 to 55, and drives the drive shaft 44 by the motor body 42.

  In the speed reducer 43, the rotation shafts of these spur gears 48 to 55 are sequentially arranged around the rotation shaft 47 of the motor main body 42 so as to surround the rotation shaft 47 (FIG. 4A). The overall shape of the machine 43 is configured to be reduced in size. The spur gears 48 to 55 are arranged so that the spur gear 48 is disposed on the motor main body 42 side and sequentially away from the motor main body 42 side in the axial direction. , 53 are arranged closer to the motor body 42 than the corresponding small diameter spur gears 50, 52, 54. Accordingly, in the reduction gear 43, these spur gears 48 to 55 are arranged so as to form a space on the side of the motor main body 42 of the drive shaft 44.

  The speed reducer 43 accommodates and holds these gears 48 to 55 in a case integrally with the motor main body 42, and provides a sensor space inside the case, and the rotation of the drive shaft 44 in the sensor space. A configuration for detecting the position is provided. Thereby, in this actuator motor 32, the length in the extending direction of the drive shaft 44 is shortened as compared with the conventional one, and the reliability is further improved as compared with the conventional one. That is, when a configuration for detecting the rotational position of the drive shaft 44 is provided in the sensor space provided inside the speed reducer 43 as described above, the space provided outside can be omitted, and thus the drive shaft can be omitted. The length of 44 can be shortened. Further, when the configuration for detecting the rotational position of the drive shaft 44 is provided inside the speed reducer 43 as described above, it is possible to prevent collision of ice blocks and adhesion of various foreign matters, thereby improving reliability. Can do.

  Further, in this embodiment, the space on the motor body 42 side of the drive shaft 44 formed by the arrangement of the gears 48 to 55 is allocated to the sensor space, so that the reduction gear 43 effectively uses the internal space. Use to effectively avoid the increase in size.

  Further, in the speed reducer 43, a recess 58 is formed in the gear cover 57 that partitions the plurality of gears 48 to 55 and the motor main body 42 inside the case, and the recess 58 is assigned to the sensor space, thereby rotating. A reduction in reliability due to the arrangement of the position detection inside the reduction gear 43 is prevented.

  That is, the speed reducer 43 has a gear case 56 formed in a box shape having an opening formed on the motor body 42 side. The gear case 56 is formed by, for example, resin injection molding, and a bearing for the rotation shaft of the gears 49 to 54 is formed. In the reduction gear 43, after the spur gears 49 to 55 are accommodated in the gear case 56, the opening on the motor main body 42 side of the gear case 56 is closed by the gear cover 57 similarly formed by resin injection molding. Here, the gear cover 57 is a partition plate that partitions the motor body 42 and the configuration related to the speed reducer 43, and bearings for the rotation shafts of the gears 49 to 54 are formed corresponding to the gear case 56. Further, the gear cover 57 is provided with a screw hole for screwing or the like that is configured to hold the motor body 42 integrally. In the speed reducer 43, a recess 58 is formed at the drive shaft 44 in the gear cover 57, and the recess 58 is allocated to the sensor space.

  In the speed reducer 43, a wiring board 59 on which a Hall element 60 for position detection is arranged is arranged in the recess 58. In the reduction gear 43, the end of the drive shaft 44 on the side of the motor body 42 protrudes from the recess 58, and a lever 61 is provided at the protruding portion. The reducer 43 has a magnet 62 disposed at the tip of the lever 61. The actuator motor 32 detects the rotational position of the drive shaft 44 by detecting the magnetic field of the magnet 62 provided on the lever 61 by the Hall element 60 disposed on the wiring board 59. The Hall element 60 is configured by an integrated circuit integrated with a signal processing circuit that processes the output signal of the Hall element 60. The Hall element 60 is positioned on the wiring board 59 corresponding to the position of the water tray 28 during ice making, and on the wiring board 59 corresponding to the position of the water tray 28 when discharging ice blocks to the ice storage chamber 24. Accordingly, the ice making device 21 drives the actuator motor 32 to rotate the water dish 28. When the magnetic field of the magnet 62 is detected by the Hall elements 60, the driving of the actuator motor 32 is stopped. Control.

  The actuator motor 32 is provided with a configuration related to the rotational position detection mechanism in the recess 58, followed by the motor main body 42, and then the back cover 65. In the actuator motor 32, the recess 58 is sealed by the back cover 65. Thus, the speed reducer 43 holds the plurality of gears 48 to 55 integrally with the motor main body 42 by the gear case 56 and the back cover 65, and forms a sensor space inside the case by the gear case 56 and the back cover 65. .

  6 and 7 are diagrams showing the relationship between the wiring board 59, the lever 61, the cam 35, and the coil spring 34 in comparison with FIGS. 2 and 3, respectively. 6 and 7 are perspective views showing the wiring board 59 and the lever 61.

  By the way, in the conventional configuration, the lever 5 for detecting the rotational position is provided at the base of the drive shaft (FIG. 8), so that the rotational position of the drive shaft 44 can be confirmed by the direction of the lever 5. Therefore, when the cam 35 is attached to the drive shaft 44, the cam 35 can be attached in the correct direction based on the direction of the lever 5. However, if the configuration relating to the detection of the rotational position, such as the actuator motor 32, is housed in the speed reducer 43, there is no clue for determining the direction of the drive shaft 44. Therefore, it is necessary to pay attention to the assembly work as compared with the conventional case, and the efficiency of the assembly work may be reduced.

  Therefore, in this embodiment, the actuator motor 32 is provided with a direction indicator 70 (FIG. 4) that indicates the direction of the drive shaft 44. Here, the direction indicator 70 is provided with a direction indicator plate 71 at the base portion of the drive shaft 44, and a scale 72 is provided in the gear case 56 corresponding to the direction indicator plate 71. In this embodiment, the direction display plate 71 is formed by a plate-like member, and is held by the drive shaft 44 with the drive shaft 44 penetrating through the through hole. The direction display plate 71 has a peripheral portion protruding in one direction to form a pointer, and the scale 72 can identify the position indicated by the pointer in the range in which the drive shaft 44 rotates, at a constant interval. And is formed in a large shape at both ends and the center of the rotation range of the drive shaft 44.

  Thus, the actuator motor 32 can attach the direction indicator 70 as a clue when attaching the cam 35, and can simplify the assembly work as compared with the conventional case. In maintenance work or the like, when the actuator motor 32 is removed and the operation of the actuator motor 32 is confirmed, the direction indicator 70 can be used as a clue to confirm the operation easily and reliably. The efficiency in the work can be improved.

  According to the above configuration, in the actuator motor that moves the water tray of the ice making device, the sensor space is provided inside the case that holds the plurality of gears related to the speed reducer, and the rotational position of the drive shaft is set in the sensor space. By providing the detection structure, the length of the drive shaft in the extension direction can be shortened compared to the conventional one, and further, the reliability of the motor can be improved compared to the conventional one, and this motor is used. An ice making device can be obtained.

  In addition, a plurality of combined gears of small and large diameter spur gears whose rotation axes are parallel are applied to the plurality of gears, and the arrangement of the gears secures a space for the sensor space inside the reduction gear, thereby reducing the speed. Effective use of the internal space of the machine can effectively avoid an increase in size.

  Furthermore, by providing a direction indicator that displays the rotational position of the drive shaft, even when a configuration for detecting the rotational position of the drive shaft is provided inside the speed reducer, the rotational position of the drive shaft can be seen. It is possible to effectively avoid a decrease in efficiency of assembly work.

  Further, by forming a recess in the gear cover that partitions the gear and the motor main body and assigning it to the sensor space, the sensor space can be configured by effectively using the configuration of the gear cover.

[Other Embodiments]
As mentioned above, although the specific structure suitable for implementation of this invention was explained in full detail, this invention can change the structure of the above-mentioned embodiment variously in the range which does not deviate from the meaning of this invention.

  That is, for example, in the above-described embodiment, the case where the position where driving is stopped by one set of hall elements is detected on the premise that the driving shaft is rotated about a half turn has been described. When the drive shaft is rotated one or more times, the present invention can be widely applied to the case where one or three or more hall elements are arranged. Further, the present invention is not limited to the case where the stop position is detected, but can be applied to the case where passage of the lever is detected.

  In the above-described embodiment, the case where the rotational speed is sequentially reduced in four stages by the gears of the parallel shaft has been described. However, the present invention is not limited to this, and is widely applied to the case where the rotational speed is reduced in one stage, for example. can do.

  In the above-described embodiment, the case where the reduction gear is configured by the gears of the parallel shaft has been described. However, the present invention is not limited to this, and can be widely applied when the rotational speed is reduced by the configuration of various gears. it can.

  In the above-described embodiment, the case where the motor main body is housed integrally in the case has been described. However, the present invention is not limited to this, and the present invention can be widely applied to cases where gears are housed separately from the motor main body. be able to.

  In the above-described embodiment, the case where the present invention is applied to an ice making device has been described. However, the present invention is not limited to this and can be widely applied to various devices.

DESCRIPTION OF SYMBOLS 1 Motor 2 Motor main body 3 Reducer 4, 44 Drive shaft 5, 61 Lever 6, 62 Magnet 7, 59 Wiring board 8, 9, 60 Hall element 10, 11 Stopper 21 Ice making device 22 Case 23 Door 24 Ice storage room 25 Ice making Mechanism 26 Mounting frame 27 Ice making chamber 28 Water tray 29 Pump motor 30 Ice making water tank 32 Actuator motor 34 Coil spring 35 Cam 42 Motor body 43 Reducer 47 Rotating shaft 48-55 Spur gear 56 Gear case 57 Gear cover 58 Recess 65 Back cover 70 Direction indicator 71 Direction indicator 72 Scale

Claims (4)

The rotational speed of the rotary shaft of the motor body, is decelerated by reducing the speed, the motor for driving the drive shaft provided in the speed reducer,
The motor body is integrally held in the speed reducer case, and the rotation shaft of the motor body is introduced into the speed reducer case.
The speed reducer is configured to house a plurality of gears that drive the drive shaft by reducing the rotation speed of the rotary shaft, in the case,
The plurality of gears are composed of a plurality of synthetic gears in which a small diameter gear and a large diameter gear are integrated on an axis parallel to the rotation axis of the motor body,
Each of the plurality of synthetic gears is arranged in the case so that the motor main body side is the larger diameter side, and sequentially moves away from the motor main body side in the axial direction as the rotational speed decreases. Arranged,
Inside the case , a sensor space is recessed at the motor body side end of the drive shaft in a state of being isolated from the plurality of gears,
A magnet is attached to the tip of the sensor space, a lever attached to the drive shaft, and a hall element that detects the rotational position of the drive shaft by detecting the magnetic field of the magnet. A motor characterized by that. The motor according to claim 1 , wherein a direction indicator that displays a rotational position of the drive shaft is provided on the drive shaft. In the case,
A gear cover that partitions the plurality of gears and the motor body is provided;
The gear cover is
A recess is formed in the drive shaft,
The motor according to claim 1, wherein the recess is the sensor space . Holding the water tray so as to face the ice making chamber, supplying water from the water tray to the plurality of ice making chambers provided in the ice making chamber to form ice blocks in the ice making chamber,
In the ice making device for separating the water dish from the ice making chamber and dropping the ice block created in the ice making chamber,
An ice making device, wherein the water dish is moved by the motor according to any one of claims 1, 2, and 3 .

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