JPH0513612B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a refrigeration device, for example, a drive mechanism for a refrigeration device that can produce ice cream, ice, etc.
Related to drive mechanisms for other devices.

[Prior art]

One type of conventional refrigeration equipment includes a cooling tank that is cooled from the outer periphery with a cooling medium, and a bottomed cylindrical container that is removably housed in the cooling tank from its upper opening, or There is a refrigeration apparatus that includes a rotatably arranged stirring blade and rotates the stirring blade to stir and freeze the contents of the container or cooling tank. In such a refrigeration system, a drive gear that is rotatably driven by a drive means such as an electric motor is used as a drive mechanism for rotating the stirring blade, and a driven gear that is rotatably assembled to the stirring blade and meshes with the drive gear. Ru.

[Problem that the invention seeks to solve]

In this way, when both of the above-mentioned gears are adopted as the drive mechanism for the stirring blade, the driven gear is installed horizontally on the upper end of the stirring blade above the upper end opening of the container or cooling tank, and the driven gear is installed horizontally at the upper end of the stirring blade at the same position. It meshes with the horizontally assembled drive gear. Therefore,
Since the meshing portions of these two gears are located above the container or the cooling tank, a means to prevent them from being caught in the meshing portions is required.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a drive mechanism for a refrigeration device that can prevent jamming by extremely simple means, and furthermore, to provide the various drive mechanisms described above.

[Means for solving problems]

In order to achieve such an object, the present invention provides a drive mechanism that includes:
A rotary member that rotates horizontally at the upper end of a rotary member that is rotatably arranged in a bottomed cylindrical container in which the object to be processed is accommodated and processes the object to be processed (for example, processes such as stirring, cutting, and pulverizing). a driven gear that can be assembled, and a drive gear that is rotationally driven by a driving means and meshes with the driven gear, and one of these gears has an outward flange portion that covers these meshing portions from above. It is characterized by

[Action/effect of the invention]

In the drive mechanism having such a configuration, if both of the gears are arranged in a circular recess and an adjacent circular recess above the upper end opening of the container, the outer periphery of each gear is placed on the upright wall of each circular recess. The engaging portions of both gears that are surrounded by the circular recesses and are not surrounded by the standing walls of each circular recess are covered from above by the outward flange portions of one of the gears. Therefore, with this configuration, biting in the meshing portion can be effectively prevented by a simple means.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a refrigeration system equipped with a drive mechanism according to the present invention. The refrigeration device is the one shown in Japanese Patent Application No. 1983-261653 filed by the present applicant, and includes a cooling tank 11, a container 12 for producing ice cream, an impeller 13, and a drive mechanism 20. machine 31, condenser 3
2. Equipped with a cooling pipe 33 which is an evaporator,
Furthermore, it is provided with an ice-making holding frame and an ice-making impeller (not shown). Each of these components is housed within a casing 34.

Compressor 31, condenser 32 and cooling pipe 33
constitutes a known refrigeration circuit as shown in FIG. Condenser 32
A bypass pipe 35c is provided between the connecting pipe 35a and the connecting pipe 35a.
5c is interposed with an electromagnetic on-off valve 36c. In such a refrigeration circuit, the cooling medium flows through the on-off valve 36c.
When closing the pipes 35b → 35a → 35d,
When the on-off valve 36c is opened, the pipe line 35b→35c
→Cycle through 35d.

The cooling tank 11 has a cylindrical shape with a bottom, around the outer periphery of which a cooling pipe 33 is wound many times, and is buried in the heat insulating layer 37a and opens upward. In the cooling tank 11, a circular through hole 11a is formed at the center of the bottom thereof, and the through hole 11a communicates with a drain hose 37c via a drain channel 37b. Drain hose 37c
is removably fitted into a holder provided on one side of the outer surface of the casing 34.

Container 12 for producing ice cream is cooling tank 11
It has a cylindrical shape with a bottom similar to that of the cooling tank 11, and is sized so that a predetermined circumferential gap is formed between the cooling tank 11 and 12 when housed in the cooling tank 11. The container 12 has a cylindrical projection 12a projecting upward from the center of the bottom thereof. Thereby, a predetermined circumferential gap is maintained between the container 12 and the inner periphery of the cooling tank 11 within the cooling tank 11.
The impeller 13 has two blades 13b and 13c integrally formed on the outer periphery of a rotating shaft 13a in upper and lower stages.
A circular recess 13d is formed to fit into the protrusion 12a. Further, a prismatic protrusion 13e is formed at the upper end of the rotating shaft 13a, and the protrusion 13e is fitted into a recess of a driven gear of a drive mechanism 20, which will be described later. The impeller 13 is positioned and rotatably supported in the container 12 with a recess 13d fitted into the projection 12a of the container 12 and a projection 13e fitted into the recess of the driven gear. In this state, the outer edges of each of the blades 13b and 13c are close to the inner circumference 12b of the container 12, as shown in FIG.

The drive mechanism 20 includes a drive motor 21, a small-diameter drive gear 22, and a large-diameter driven gear 23, and the motor 21 is supported by an upper plate 34a within a casing 34, as shown in FIG. As shown in FIG. 3, this upper plate 34a has a pair of circular recesses 34a1 and 34a2 formed above the drive motor 21 and the cooling tank 11, and the first circular recess 34a1 is slightly smaller than the drive gear 22. The second circular recess 34a2 has a larger diameter than the driven gear 23.
They are formed with a slightly larger diameter and communicate with each other on the inside. A small diameter opening 34b is formed in the center of the first circular recess 34a1, and the drive shaft 21a of the motor 21 projects from the small diameter opening 34b.
An adapter 21b is fitted onto the drive shaft 21a, and the adapter 21b protrudes from the small diameter opening 34b so as to be rotatable together with the drive shaft 21a. The adapter 21b has a rectangular tube shape. The drive gear 22 has an angular recess 22a opening downward in its center boss, and an adapter 21b of the motor 21.
It is fitted removably and integrally rotatably to the
It is located within the first circular recess 34a1 of the top plate 34a.
The large-diameter gear 23 has an angular recess 23a that opens downward in its central boss, has teeth 23b on its outer periphery, and has an outward flange 23c on its upper surface that protrudes outward from the teeth 23b. We are prepared. The recess 23a of the driven gear 23 fits into the protrusion e of the impeller 13, and when the impeller 13 is supported in the container 12, it is supported within the second circular recess 34a2 of the upper plate 34a.
The impeller 13 is located above a large diameter opening 34c provided concentrically with the impeller 13, and can be attached to and detached from the impeller 13 and rotated together with the impeller 13. Further, in this state, the teeth 23b of the driven gear 23 are meshed with the teeth 22b on the outer periphery of the drive gear 22, and each gear 22,
The outer periphery of the tooth portions 22b and 23b of 23 is provided with each circular recess 34.
Surrounded by the standing walls of a1 and 34a2, and both gears 2
The meshing portions 2 and 23 are covered from above by an outward flange portion 23c of the driven gear 23.

Note that the reference numeral 38 in FIG. 1 indicates the casing 3.
The lid 38 is removably fitted to the upper edge of the casing 34, and is fitted into the central protrusion 23d of the driven gear 23 at its recess 38a. The gear 23 is rotatably supported.

To produce ice cream using the freezing device, first, the drain hose 37c is fitted to the holder, and then a small amount of water is injected into the cooling tank 11 to fill the circumferential gap between the cooling tank 11 and the container 12. Cooling tank 11
A container 12 filled with ice cream batter is housed inside. Next, the drive gear 2 of the drive mechanism 20
2 to the adapter 21b of the motor 21, and the protrusion 13e of the impeller 13 is fitted to the recess 23a of the driven gear 23 to assemble the impeller 13 to the driven gear 23, and the impeller 13 in this state is assembled. It is placed upright inside the container 12.
The impeller 13 has a recess 13 in its rotating shaft 13a.
By fitting d into the protrusion 12a on the bottom of the container 12, it is positioned within the container 12 and rotatably supported. Finally, by fitting the lid 38 to the upper peripheral edge of the casing 34, the refrigeration system is set in the state shown in FIG.

In such a state, if the switch of the drive circuit (not shown) of the refrigeration system is closed and electricity is supplied for a predetermined period of time, the compressor 31 will start and the refrigerant will flow to the side of the pipe line 35b→35a→35d shown in FIG. The reflux cools the cooling tank 11, while the motor 21 in the drive mechanism 20 is started to rotate the impeller 13 and stir the ice cream batter. However,
As cooling progresses in the cooling tank 11, the cooling tank 1
The water present in the circumferential gap between the container 1 and the container 12 freezes to combine the two 11 and 12 with the minimum ice pressure, and the container 12 is frozen while maintaining heat conduction between the two. Prevents rolling. In addition, in the container 12, the inner circumference 12b
The ice cream dough is frozen and gradually grows.
This frozen material is sequentially scraped off by the impeller 13. When all of the ice cream dough in the container 12 is frozen and turned into ice cream after a predetermined period of time has elapsed, the supply of power to the freezing device is stopped and the motor 21, compressor 31, etc. stop driving. Therefore, the cover body 38 is removed and the impeller 13 is removed.
If the ice cream is taken out from the container 12 together with the driven gear 23, the ice cream can be easily taken out. In addition, in order to drain the water in the cooling tank 11, the drain hose 37c is removed from the holder and directed downward. As a result, water in the cooling tank 11 passes through the through hole 11a and the drain channel 37b to the drain hose 37.
It is discharged from c.

By the way, in the refrigeration system, the drive gear 22 and the driven gear 23 of the drive mechanism 20
are located in the respective circular recesses 34a1, 34a2 of the upper plate 34a, and the toothed portions 22b,
23b is surrounded by the upright walls of the respective recesses 34a1 and 34a2, and the meshing portion of both gears 22 and 23 is covered from above by the outer peripheral flange portion 23c of the driven gear 23. Therefore, according to this configuration,
Biting in the meshing portion is effectively prevented.

In addition, in the above embodiment, the drive mechanism of the refrigeration device that can selectively produce ice cream and ice was shown, but the present invention
It can also be applied to drive mechanisms for refrigeration equipment and other equipment dedicated to ice production.

Further, in the above embodiment, the driven gear 2
Outward flange portion 23c protruding outward from the upper surface of 3
Although the present invention was implemented by providing the drive gear 22
It is also possible to carry out the invention by providing an outwardly directed flange on the upper surface of the holder.

[Brief explanation of the drawing]

FIG. 1 is a partially vertical side view of a refrigeration device according to an embodiment of the present invention, FIG. 2 is a refrigeration circuit diagram of the same device, and FIG. 3 is a plan view of the same device with the lid removed. . Explanation of symbols 11...Cooling tank, 12...Container, 13
... Impeller, 20... Drive mechanism, 21... Motor,
22, 23... Gear, 22b, 23b... Teeth, 23
c...Outward flange portion, 31...Compressor, 32...Condenser, 33...Cooling pipe, 34a...Upper plate, 34a
1,34a2...Circular recess.

Claims (1)

[Claims] 1. A driven gear which is rotatably disposed in a bottomed cylindrical container in which the object to be processed is accommodated and is integrally and rotatably assembled horizontally to the upper end of a rotating member that processes the object to be processed, and a drive means. 1. A drive mechanism comprising: a drive gear that rotates and meshes with the driven gear; one of the two gears includes an outward flange portion that covers the meshing portion from above.