JP2593993Y2 - Bearing structure of auger ice machine - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auger type ice making machine, and more particularly to a structure of an upper bearing for rotatably supporting an upper portion of an auger.

[0002]

2. Description of the Related Art In an auger type ice making machine, a frozen casing is cooled from the outside, and ice formed on the inner wall surface is scraped by a spiral peeling blade of the auger and pushed upward.
FIG. 6 shows a part of a typical example of such a conventional auger type ice making machine. In the figure, a freezing casing 1 has a cylindrical shape and supports a pressing head 3 at an upper end thereof. Pressing head 3
Has an ice compression passage (not shown) for compressing the scraped ice and sending it upward while compressing the scraped ice.
The upper shaft is supported.

As can be seen from FIG. 6, the peeling blade 7a of the auger 7 scrapes ice and sends it upward, and thus receives a downward force as its resistance. On the other hand, since the pressing head 3 is pressed by the ice that is scraped and sent upward, it receives an upward force, so that the gap between the lower end surface of the pressing head 3 and the shoulder surface of the auger 7 is easily widened. Further, impurities such as silica and calcium in the ice making water have a tendency to move to an unfreezed portion when the ice making water is frozen, so that the concentration becomes high near the lower end of the pressing head 3 and is likely to precipitate. That is, the precipitated fine solid impurities are likely to be pressed into the sliding bearing 5 through the widened gap. As a matter of course, when solid impurities enter the bearing surface, the bearing is easily damaged.

On the other hand, as described above, the ice pushed upward through the ice compression passage of the pressing head 3 is cut into a predetermined length by the cutter 9 attached to the upper end of the auger 7. In this way, since the upper shaft portion of the auger 7 receives the reaction force at the time of ice cutting, the reaction force of the bearing increases, and it is easy to receive a large frictional force. That is, the bearing portion of the upper shaft portion of the auger 7 is in a severe condition from the viewpoint of the load and from the side of the contaminants on the bearing surface.

[0005] Under such circumstances, various proposals have been made to protect the upper bearing of the auger of the auger type ice maker from damage. First, as to the first example, a thrust bearing is provided on the upper end side of the upper shaft portion, a downward force of the auger is transmitted to the pressing head, a radial bearing is provided on the lower end side of the upper shaft portion, and the torque reaction force is reduced. receive. By doing so, the auger and the pressing head are integrated and the gap between them is prevented. However, these two bearings are surrounded by two oil seals, and water and impurities enter. And leakage of the lubricant is prevented (see Japanese Patent Application Laid-Open No. 58-21020).

Secondly, a plurality of grooves are provided on both the upper auger shaft and the lower portion of the pressing head corresponding to the helical peeling blade, so that sherbet-like ice which enters by being pressed by the compression passage is formed by the grooves. A configuration has also been proposed in which solidification is performed to prevent intrusion of ice or foreign matter into the bearing portion (Japanese Utility Model Application Laid-open No. 60-187887).
Reference). Thirdly, it has been proposed to form a concave portion in the lower portion of the pressing head or the upper end surface of the spiral peeling blade of the auger and provide a sliding member therein to prevent abnormal wear of the pressing head and the auger made of the same material. (See Japanese Utility Model Publication No. 61-32304). Fourth, the rib forming the ice compression passage of the pressing head is projected downward from the boss portion, and a washer for adjusting the gap with the upper surface of the auger is provided in the recess formed thereby, thereby adjusting the gap and controlling the ice. It has also been proposed to prevent clogging and to prevent radial displacement of the auger (see Japanese Utility Model Publication No. 3-36858).

[0007]

In the first proposal described above, the pressing head and the auger are integrated, and the gap between the two remains unchanged. However, sherbet-like ice particles or the like are formed on the lip of the lower oil seal. When foreign matter in the water is pressed, the lip is easily damaged, the life of the bearing is reduced due to the intrusion of water, the lubricant flows out, and the like, so that it is hardly practically used. In the second proposal, ice that has entered the groove is solidified to prevent foreign matter in the water from entering the bearing portion, but this is not effective at the beginning of operation. Further, in the third and fourth proposals,
Although a washer or the like is used, as described above, the gap tends to expand as described above due to the direction of action of the force, so that the expected effect cannot be obtained.
That is, the conventional proposals have advantages and disadvantages, and a complete solution to the problem has not been obtained. The present invention has been made in view of such circumstances. Even if a contaminant enters the bearing portion, it is hardly damaged, and even if foreign matter is generated in the bearing portion, the foreign matter is transferred to the ice making portion. Don't migrate and get into the water
The purpose is to provide such a bearing structure
is there.

[0008]

According to the present invention, a refrigeration casing having a vertical cylindrical cross section and a spiral peeling provided in the refrigeration casing and adjacent to the inner surface of the refrigeration casing are provided. Bearing part of an auger type ice making machine having an auger having a blade and a pressing head provided inside the upper end of the freezing casing and having an ice compression passage and supporting an upper shaft part of the auger via a slide bearing. The structure is formed integrally with the auger and extends towards the pressure head
An annular projection and an annular projection with respect to the annular projection
Of the pressing head extending so as to have overlap in the axial direction of the
By the Tangaishu unit, comprising defining a foreign matter trapping space in proximity to at least one of upper or <br/> lower end of the sliding bearing.

[0009]

In the above construction, a part of the sliding surface is missing.
Even if it becomes foreign matter, it is caught in the foreign matter trap space and
Since no special lubricant is used in the section,
Prevent contamination.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding parts. In FIG. 1, the lower end of a freezing casing 11 having a cylindrical cross section of an auger type ice making machine 10 is supported by a casing 15 connected to a geared motor 13, and an auger 17 coaxially arranged in the freezing casing 11 is provided. , Driven by a geared motor 13 via a power transmission mechanism (not shown). Auger 17
A spiral peeling blade 17a is formed on the surface of the upper part, and the upper part is further reduced in diameter to form an upper shaft part 17b, and a cutter 19 is fixed to an end thereof.

An outer surface of the freezing casing 11 is provided with a heat insulating material 21.
A refrigerant evaporating pipe 23 is interposed between the heat insulating material 21 and the refrigeration casing 11, and is wound around the outer surface of the refrigeration casing 11, and is provided with an evaporation heat of the refrigerant flowing inside. Thereby, the freezing casing 11 and the ice making water therein are cooled. A pressing head 25 is fixed inside the upper end of the freezing casing 11. A sliding bearing 27 is provided on the inner surface of the pressing head 25, and rotatably supports the upper shaft portion 17b of the auger 17. On the other hand, an ice discharge chute 29 surrounding the cutter 19 is fixed outside the upper end of the freezing casing 11.

FIG. 2 is an enlarged view of the periphery of the upper portion of the freezing casing 11. A shoulder is formed between the large-diameter portion 17c on which the peeling blade 17a is formed and the upper shaft portion 17b. An annular projection 17e is provided on the shoulder 17d.
Are formed, and the lower end of the slide bearing 27 and the pressing head 25 are formed.
Thus, a foreign substance trap space, that is, a foreign substance reservoir A is defined. Extrusion head 25 for supporting the sliding bearing 27 is configured to form ice compression passage, not shown, the lower end outer peripheral portion 25a is extended downwardly, the radial dimension d ₂ between the annular projection 17e of the auger 17 cyclic Form a gap.

On the inner peripheral portion of the upper end surface of the pressing head 25, an annular lid 3 is provided.
1 defines a foreign matter trapping space or foreign matter reservoir B which is closed. On the outer surface of the upper shaft portion 17b of the auger 17, a metal layer 17f made of a welded high-hardness metal is formed in a portion surrounded by the sliding bearing 27, and the bearing surface of the sliding bearing 27 has A lubricant groove 27a is formed to supply water to the sliding surface to contribute to lubrication, and foreign matter having a size that can easily pass through the lubricant groove 27a is generated by rotation of the auger upper shaft and water pressure (pressing head). (Depending on the pressure).

FIG. 3 shows the external shape of each member by further enlarging the bearing portion of FIG. The above-mentioned dimension d ₂ is preferably as small as possible. Generally, it is assumed that a margin is added to a value obtained by adding a wear amount of a bearing part to a variation amount of a gap due to a manufacturing tolerance of each member. Is good. The height H ₁ of the annular projection 17e has a height of the lower end outer peripheral portion 25a H ₂
It is set slightly smaller. Further, it is preferable that the total volume of the foreign material reservoirs A and B be as large as possible.
It is preferable that the total volume be 1.5 times or more. In the above-described configuration, the high hardness metal layer 17f provided on the surface of the upper shaft portion 17b of the auger 17 undergoes plastic deformation in the shaft material when subjected to surface pressure generated during operation via hard foreign matter on the surface. By making the thickness such that a local force is not applied (the thickness depends on the metal to be applied, it is preferably at least 0.3 mm, and in the embodiment, 0.5 mm), the bearing surface of the slide bearing 27 and the high hardness metal layer 17 f In this way, a good sliding surface suitable for ice making operation is formed, and the wear resistance can be greatly improved. Further, with the construction of the above metal, corrosion occurs from a defective portion such as a pinhole due to long-term operation and progresses, and even if a part of the metal layer is peeled, the peeled pieces remain in the foreign matter reservoirs A and B. As a result, foreign matter can be prevented from entering the ice, and the wear resistance is not impaired.

Further, the operation of the above-described structure will be described. The ice making water freezes and grows on the inner surface of the refrigeration casing 11 cooled from the outside. This ice is supplied to the peeling blade 17a of the auger 17 driven by the geared motor 13.
While being scraped off, it is sent upward and is compressed and hardened while passing through a compression passage (not shown) of the pressing head 25. The hardened ice is cut to a predetermined size by a cutter 19 which rotates together with the auger 17, and the ejection chute 2
Emitted from 9.

A downward force is applied to the auger 17 by scraping and sending out ice, while an upward force is applied to the pressing head 25. However, the annular projection 17e and the outer peripheral lower end 25a are axially opposed to each other. Just moving, the dimension d ₂ does not change. The slide bearing 27 slidably supports the upper shaft portion 17b of the auger 17 by supplying water serving as a lubricant to the sliding surface through the lubricant groove 27a. At this time, even if foreign matter is generated in the metal layer 17f or the slide bearing 27 due to separation or the like, the foreign matter reservoir A,
Captured by B. The foreign matter reservoirs A and B are shown in FIG.
It may be formed as shown in FIG. In each figure, reference numerals 117 and 217 denote augers, and 117 b and 217
b is an upper shaft portion, and reference numerals 125 and 225 are pressing heads.

[0017]

[Effects of the Invention] As described above, according to the present invention,
Integrally formed with the auger and extending toward the pressure head
An annular projection, and an annular projection with respect to the annular projection.
The pressing head extending so as to have an overlap in the axial direction of the pressing head.
By the end outer peripheral portion of, at least the upper <br/> end or one foreign matters trap space in proximity to the lower end of the sliding bearing is defined, foreign substances generated in the bearing portion is captured therein, ice It is prevented from flowing into the section and mixing with ice, so that sanitary and safe ice can always be produced. Further, since the gap leading to the ice making section in the lower foreign matter trap space is always kept constant, foreign matter in the ice making water is prevented from entering the bearing section from here.

[Brief description of the drawings]

FIG. 1 is an elevational view, partially in section, of an auger ice maker having a bearing structure according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional view showing a bearing unit structure in the embodiment of FIG.

FIG. 3 is an enlarged contour diagram showing a main part of the bearing structure in the embodiment of FIG. 1;

FIG. 4 is a partial sectional view showing a modified embodiment in which a part of the embodiment of FIG. 1 is modified.

FIG. 5 is a partial sectional view showing another modified embodiment in which a part of the embodiment of FIG. 1 is modified.

FIG. 6 is a partial cross-sectional view showing a conventional bearing structure of an auger type ice making machine.

[Description of References] 10: auger type ice machine, 11: freezing casing, 17: auger, 17a: helical peeling blade of auger, 17b: upper shaft portion of auger, 17e: annular protrusion,
17f: High hardness metal layer, 25: Press head, 27: Slide bearing, 117: Auger, 117b: Upper shaft part of auger, 1
25 ... pressing head 217 ... auger, upper shaft portion of the 217b ... auger 2 25 ... pressing head, A ... foreign matter trapping space (foreign matter reservoir), B ... foreign matter trapping space (foreign matter reservoir).

Continuation of the front page (56) References Japanese Utility Model Sho 62-130374 (JP, U) Japanese Utility Model Sho 55-85674 (JP, U) Japanese Utility Model Sho 61-124865 (JP, U) (58) Fields surveyed (Int) .Cl. ⁶ , DB name) F25C 1/14

Claims (1)

(57) [Scope of request for utility model registration] 1. A freezing casing having a vertical cylindrical section, an auger provided in the freezing casing and having a spiral peeling blade close to an inner surface of the freezing casing, and an ice compression passage provided inside an upper end of the freezing casing. An auger-type ice making machine comprising: a pressing head that supports an upper shaft portion of the auger via a slide bearing.
An annular projection formed integrally and extending towards the pressing head
A raised portion and an axial center of the annular projection with respect to the annular projection.
Outer periphery of the end of the pressing head extending so as to have an overlap in the direction
Parts and the bearing part structure of the auger type ice making machine characterized by comprising defining a foreign matter trapping space in proximity to at least one of upper or lower <br/> end of the sliding bearing.