JP2012002383A - Auger for ice maker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To dispense with many troublesome operations required for formation of a wear-resistant journaling portion on each of upper and lower shaft portions constituting an auger for an ice maker, which is indispensable in the conventional auger for the ice maker, to reduce the man-hours of processing by constituting the auger for the ice maker so that the formation of the journaling portion on each of the upper and lower shafts can be eliminated.SOLUTION: An auger body 21 constituting the auger 20 for the ice maker is formed from non-precipitation hardening stainless steel (SUS304), and an upper end-side shaft portion 22 and a lower end-side shaft portion 23 are formed from precipitation hardening stainless steel (SUS630H900) which has high strength and high hardness, compared with the auger body 21. The upper end-side shaft portion 22 and the lower end-side shaft portion 23 are frictionally pressure-welded to the respective ends of the auger body 21. Since each shaft portion 22, 23 is high in strength and hardness, itself can be made to function as a journaling portion.

Description

  The present invention relates to an auger for an ice making machine used in an auger type ice making machine.

  As one type of auger for ice making machine, a columnar auger body having a spiral blade protruding spirally on the outer peripheral surface, an upper end side shaft portion coaxially joined to the upper end portion of the auger body, and A lower end side shaft portion coaxially joined to the lower end portion of the auger body, the upper end side shaft portion and the lower end side shaft portion are rotatably supported in the cooling cylinder, and the lower end side There is an auger for an ice making machine in which the spline portion of the shaft portion and the output shaft of the drive source are connected to each other so as to be able to transmit torque.

  In the auger for an ice making machine of this type, since the upper end side shaft portion and the lower end side shaft portion are rotatably supported, the shaft abutment portion on which each shaft portion is directly supported is in rotation of the auger. Therefore, it is required to have wear resistance that can sufficiently withstand the friction. For this reason, in the conventional ice making auger, each shaft portion is separately formed with a wear-resistant shaft support portion (see Patent Documents 1, 2, etc.).

JP-A-9-310950 JP 2001-153509 A

Thus, in the conventional ice making auger of this type, it is indispensable to separately form wear-resistant shaft support portions on the upper end side shaft portion and the lower end side shaft portion. In order to form an auger for an ice making machine, the number of work steps for forming the shaft support portion is increased.
In order to form the wear-resistant shaft support portions on the upper end side shaft portion and the lower end side shaft portion constituting the ice making auger, specifically, a predetermined portion of the outer peripheral surface of the base material serving as the shaft portion is predetermined. An annular recess having a predetermined depth is formed (annular recess forming step), and the annular recess is overlaid by plasma arc welding or the like using a specific welding material (building up step). It is necessary to grind and finish the outer periphery (finishing process). In other words, in order to form the wear-resistant shaft support portions on the upper end side shaft portion and the lower end side shaft portion constituting the ice making auger, the three steps of the annular recess forming step, the build-up step, and the finishing step are minimized. As long as necessary.

As described above, in the conventional ice making auger of this type, many troublesome processing steps are required to form the wear-resistant shaft support portions on the upper end side shaft portion and the lower end side shaft portion, respectively. This has led to an increase in man-hours when forming an auger for an ice making machine.
Therefore, an object of the present invention is to make the upper end side shaft portion and the lower end side shaft portion constituting the auger for ice making machine of this type of material higher in strength and hardness than the auger body constituting the auger for ice making machine. By forming the upper end side shaft portion and the lower end side shaft portion themselves to have the function of the shaft support portion, a wear-resistant shaft support portion is separately formed on each of the upper end side shaft portion and the lower end side shaft portion. Is to reduce the man-hours for forming the auger for the ice making machine of this type.

The present invention relates to an auger for an ice making machine. An auger for an ice making machine to which the present invention is applied includes a columnar auger body having a helical blade protruding spirally on an outer peripheral surface, and an upper end side shaft coaxially joined to the upper end of the auger body And a lower end side shaft portion coaxially joined to the lower end portion of the auger body, and the upper end side shaft portion and the lower end side shaft portion are rotatably supported in a cooling cylinder, and An auger for an ice making machine of a type erected in a state where the spline portion of the lower end side shaft portion and the output shaft of the drive source are connected so as to be able to transmit torque.
Thus, in the auger for ice making machine according to the present invention, the auger body is formed of non-precipitation hardening type stainless steel, and the upper end side shaft portion and the lower end side shaft portion are higher in strength than the auger body. And the upper end side shaft portion is joined to the upper end portion of the auger body by friction welding and the lower end side shaft portion is the lower end portion of the auger body. It is characterized by being joined by friction welding.

  In the auger for ice making according to the present invention, the upper end side shaft portion and the lower end side shaft portion constituting the ice making auger may be formed of precipitation hardening stainless steel having a Rockwell hardness (HRC) of 40 or more. it can.

  Further, in the ice making auger according to the present invention, the auger body constituting the ice making auger is formed of stainless steel of SUS304, and the upper end side shaft portion and the lower end side constituting the ice making auger are formed. The shaft portion can be formed of SUS630H900 precipitation hardening stainless steel.

  In the auger for ice making machine according to the present invention, the upper end side shaft portion and the lower end side shaft portion joined to the upper and lower end portions of the auger body have a higher strength and higher hardness than the auger body. It is made of stainless steel. For this reason, the upper end side shaft portion and the lower end side shaft portion constituting the ice making auger have high strength and high hardness, and can function as a wear-resistant shaft support portion.

Therefore, in the auger for ice making machine according to the present invention, it is not necessary to separately form a wear-resistant shaft support part on each of the upper end side shaft part and the lower end side shaft part, and the man-hours for forming the ice making machine auger, Specifically, it is possible to reduce the man-hours for forming the shaft support portion on each of the upper end side shaft portion and the lower end side shaft portion.
Further, in the auger for ice making machine according to the present invention, since the lower end side shaft portion is formed of high strength and high hardness precipitation hardening stainless steel, the spline portion formed on the lower end side shaft portion is Even when the strength is high and high torque is applied to the spline portion from the output shaft side of the drive source, it is possible to greatly reduce the occurrence of defects such as deformation and damage of the spline portion.

  Further, in the ice making auger according to the present invention, precipitation hardened stainless steel subjected to precipitation hardening heat treatment is adopted as the upper end side shaft portion and the lower end side shaft portion, and these shaft portions are connected to the ends of the auger body. A means for friction welding to the part is employed. For this reason, when the upper end side shaft portion and the lower end side shaft portion made of precipitation hardening stainless steel before precipitation hardening heat treatment are joined to each end portion of the auger body, and the precipitation hardening heat treatment is performed on each joined shaft portion. The set characteristics of the auger body can be sufficiently maintained without any adverse thermal effects caused by the precipitation hardening heat treatment on the auger body which may occur.

It is the side view which cut through a part which shows the auger ice making machine which employ | adopted one Embodiment of the auger for ice making machines which concerns on this invention. It is a side view which shows one Embodiment of the auger for ice makers based on this invention.

  The present invention relates to an auger for an ice making machine. FIG. 1 shows an auger type ice making machine employing an embodiment of an ice making auger according to the present invention, and FIG. 2 shows an embodiment of an ice making auger according to the present invention. The auger type ice making machine includes an ice making mechanism 10, an ice making auger 20 that is rotatably disposed in a cylindrical cooling cylinder constituting the ice making mechanism 10, and stands up coaxially. An ice breaking mechanism 30 disposed on the upper end side shaft portion and a drive mechanism 40 coupled to the lower end side shaft portion of the ice making machine auger 20 so as to transmit torque are provided.

  The ice making mechanism 10 constituting the auger type ice making machine includes a cylindrical cooling tube 11 and an evaporation pipe 12 that is tightly wound around the outer periphery of the cooling tube 11, and the outer periphery of the cooling tube 11 has a heat insulating property. Covered with a cover body 13.

  As shown in FIG. 2, the auger for ice making constituting the auger type ice making machine includes a columnar auger body 21 having a spiral blade portion 21 a and an upper end side shaft joined to the upper end portion of the auger body 21. Part 22 and a lower end side shaft part 23 joined to the lower end part of the auger main body 21, and the lower end part of the lower end side shaft part 23 is connected to the output shaft of the drive mechanism 40 so as to be able to transmit torque. Is formed.

  The ice breaking mechanism 30 includes a cylindrical fixed blade 31 and a cutting tool 32. The fixed blade 31 has a shaft 33 on the upper end side of the auger 20 for ice making machine in a state where a bearing 33 is fitted on the inner peripheral side thereof. The outer periphery of 22 is rotatably fitted around, and in this state, it is fixed to the upper end of the cooling cylinder 11 via screws. In this fixed state, the fixed blade 31 rotatably supports the upper end side shaft portion 22 of the ice making auger 20. The folding tool 32 includes a broken part 32a at a part below the head, and is attached to the upper end of the upper end side shaft part 22 of the auger 20 for ice making machine.

  The drive mechanism 40 includes an electric motor 41 and a speed reducer 42, and an output shaft 43 of the speed reducer 42 is connected to a spline portion 23a provided on the lower end side shaft portion 23 of the ice making machine auger 20 in a torqueable manner. . The lower end side shaft portion 23 of the ice making auger 20 is rotatably supported by a cylindrical shaft support portion 14 provided at the lower end portion in the cooling cylinder 11 via a bearing 15. As a result, the ice making auger 20 stands coaxially in the cooling cylinder 11 with the upper end side shaft portion 22 and the lower end side shaft portion 23 rotatably supported by the shafts of the drive mechanism 40. The output shaft 43 is connected to the output shaft 43 so that torque can be transmitted.

  In the ice making operation of the auger type ice making machine, ice making water is supplied into the cooling cylinder 11 through the water supply pipe 16 and a cooling medium is supplied into the evaporation pipe 12. Thereby, in the cooling cylinder 11, ice making water gradually freezes on the inner peripheral surface, and the ice formed is scraped and scraped off by the spiral blade portion 21a of the auger body 21 of the ice making auger 20 that is driven to rotate. The ice is sequentially transferred upward and inserted into the ice compression passages formed between the blades from the tips of the blades of the fixed blade 31.

  The ice inserted into each ice compression passage is gradually compressed while passing through each ice compression passage to become long compressed ice, and is conveyed upward through the upper end opening of each ice compression passage. When the compressed ice protrudes by a predetermined length, the upper end of the compressed ice collides with the breakage portion 32a of the breaker 32 attached to the head of the ice making auger 20 and is broken and cut into ice blocks. The ice blocks formed by being sequentially broken are sequentially accommodated in an ice storage (not shown) provided in an upper part of the auger type ice making machine.

  Therefore, in the ice making auger 20 according to the present invention, the auger body 21, the upper end side shaft portion 22, and the lower end side shaft portion 23 are separately formed of stainless steels of different materials. The auger body 21 constituting the ice making auger 20 is made of SUS304 stainless steel, which is a non-precipitation hardening type stainless steel. The upper end side shaft portion 22 and the lower end side shaft portion 23 constituting the ice making auger 20 are: It is formed of SUS630H900 stainless steel, which is a precipitation hardening stainless steel having a higher strength and higher hardness than the auger body 21 and having a Rockwell hardness (HRC) of 40 or more.

  The auger main body 21, the upper end side shaft portion 22, and the lower end side shaft portion 23, which are formed separately from each other, are joined by frictional pressure contact between the upper end side shaft portion 22 and the upper end portion of the auger main body 21, and The lower end side shaft portion 23 is joined to the lower end portion of the auger main body 21 by friction welding, and the ice making machine auger 20 is configured by such a joining structure.

  In the ice making auger 20 having such a configuration, the upper end side shaft portion 22 and the lower end side shaft portion 23 joined to the upper and lower end portions of the auger body 21 are higher than the auger body 21 (SUS304). It is made of precipitation hardened stainless steel (SUS630H900) having high strength and high hardness. For this reason, the upper-end side shaft portion 22 and the lower-end side shaft portion 23 constituting the ice making auger 20 have high strength and high hardness, and can function as wear-resistant shaft support portions.

In other words, in the upper end side shaft portion 22, the shaft portion itself can be used as the shaft support portion 22a, and in the lower end side shaft portion 23, the shaft portion itself above the stainless steel portion 23a is used as the shaft support portion 23b. Can be used. Accordingly, in the ice making auger 20, there is no need to separately form wear-resistant shaft support portions on the upper end side shaft portion 22 and the lower end side shaft portion 23, and the man-hours for forming the ice making auger 20 are as follows: Specifically, it is possible to eliminate the man-hours for separately forming the shaft support portions on the upper end side shaft portion 22 and the lower end side shaft portion 23, respectively.
Further, in the ice making auger 20, the lower end side shaft portion 23 is formed of the high strength and high hardness precipitation hardening stainless steel (SUS630H900). The spline portion 23a has high strength, and even when a high torque is applied to the spline portion 23a from the output shaft 43 side of the drive mechanism 40, the occurrence of defects such as deformation and damage to the spline portion 23a can be greatly reduced. Can do.

  In the ice making auger 20, the upper end side shaft portion 22 and the lower end side shaft portion 23 are formed of precipitation hardening stainless steel (SUS630H900) subjected to precipitation hardening heat treatment, and these upper end side shafts are formed. The means 22 and the lower end side shaft portion 23 are joined to each end of the auger body 21 by friction welding. For this reason, it occurs when the upper end side shaft part and the lower end side shaft part made of precipitation hardening stainless steel before precipitation hardening heat treatment are joined to each end part of the auger body, and each joined shaft part is subjected to precipitation hardening heat treatment. It is possible to maintain the set high characteristics of the auger body without any adverse thermal effects due to the precipitation hardening heat treatment on the auger body.

DESCRIPTION OF SYMBOLS 10 ... Ice making mechanism, 11 ... Cooling cylinder, 12 ... Evaporating pipe, 13 ... Cover body, 14 ... Shaft support part, 15 ... Bearing, 16 ... Water supply pipe line, 20 ... Ice machine auger, 21 ... Auger main body, 21a ... Spiral Blade portion, 22 ... upper end side shaft portion, 22a ... shaft support portion, 23 ... lower end side shaft portion, 23a ... spline portion, 23b ... shaft support portion, 30 ... folding mechanism, 31 ... fixed blade, 32 ... cutting tool, 32a ... Broken part, 33 ... bearing, 40 ... drive mechanism, 41 ... electric motor, 42 ... speed reducer, 43 ... output shaft.

Claims (3)

A cylindrical auger body having a spiral blade portion that spirally protrudes from the outer peripheral surface, an upper end side shaft portion that is coaxially joined to the upper end portion of the auger body, and a lower end portion of the auger body that is coaxial. The lower end side shaft portion is joined, and the upper end side shaft portion and the lower end side shaft portion are rotatably supported in the cooling cylinder, and the lower end side shaft portion has a spline portion and a drive source. An auger for an ice maker standing in a state where an output shaft is connected so as to be capable of transmitting torque, wherein the auger body is formed of non-precipitation hardening type stainless steel, and the upper end side shaft And the lower end side shaft portion are made of precipitation hardened stainless steel having higher strength and hardness than the auger body, and the upper end side shaft portion is friction-welded to the upper end portion of the auger body. The lower end side shaft portion is joined to the auger body. Ice making machine auger, characterized in that it is joined by friction welding to the lower end. 2. The ice making auger according to claim 1, wherein the upper end side shaft portion and the lower end side shaft portion constituting the ice making machine auger are formed of precipitation hardening stainless steel having a Rockwell hardness (HRC) of 40 or more. An auger for an ice making machine. 3. The ice making auger according to claim 1, wherein an auger body constituting the ice making auger is formed of stainless steel of SUS304, and an upper end side shaft portion and a lower end constituting the ice making auger. An auger for an ice making machine, characterized in that the side shaft portion is formed of precipitation hardened stainless steel of SUS630H900.

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