Gear box for ice maker

Abstract

The utility model relates to a gear box for an ice maker, which comprises an outer rotor brushless motor, a power output shaft, a transmission assembly, an aluminum box body and a plastic cover body, the aluminum box body is detachably connected with the plastic cover body, the outer rotor brushless motor is arranged on the aluminum box body, and the power output shaft is arranged on the outer rotor brushless motor. The output end of the outer rotor brushless motor is in transmission connection with a power output shaft through a transmission assembly, one end of the power output shaft is installed on an aluminum box body through a first bearing, the aluminum box body axially supports the first bearing and the power output shaft, and the other end of the power output shaft is installed on a plastic cover body through a second bearing. According to the utility model, a structure of combining the aluminum box body and the plastic cover body is adopted, so that good bearing performance can be ensured, heat dissipation of the motor is facilitated, and the cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gear boxes, in particular to a gear box for an ice maker. Background Art

[0002] An ice maker is a refrigeration mechanical device that generates ice by cooling water through an evaporator with the refrigerant of a refrigeration system. It is widely favored by consumers. Ice cubes are squeezed out by rotating the gear box drive screw. The gear boxes in existing ice makers mostly adopt a bottom-mounted installation structure, that is, the gear box is installed below the screw, and the power output shaft of the gear box is connected to the lower end of the screw. The ice cubes are squeezed out from the top through the rotation of the screw. Therefore, the power output shaft of the gear box needs to withstand a large axial load-bearing force. Therefore, most gear boxes use an aluminum casing, which not only has good load-bearing capacity, but also facilitates heat dissipation, and the motor is not easy to burn out, but the cost is relatively high. Utility Model Content

[0003] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a gear box for an ice maker, which has low cost, good load-bearing capacity and convenient heat dissipation.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a gear box for an ice maker, comprising an outer rotor brushless motor, a power output shaft, a transmission assembly, an aluminum case and a plastic cover, wherein the aluminum case is detachably connected to the plastic cover, the outer rotor brushless motor is mounted on the aluminum case, the output end of the outer rotor brushless motor is connected to the power output shaft through the transmission assembly, one end of the power output shaft is mounted on the aluminum case through a first bearing, and the aluminum case axially supports the first bearing and the power output shaft, and the other end of the power output shaft is mounted on the plastic cover through a second bearing.

[0005] Furthermore, a helical gear is provided at the output end of the outer rotor brushless motor, and the transmission assembly includes a primary helical gear meshing with the helical gear, a secondary gear meshing with the primary helical gear, and a tertiary gear meshing with the secondary gear, and the tertiary gear is locked on the power output shaft.

[0006] Furthermore, the aluminum box body is provided with a first mounting position for installing a first bearing, and an axial hole for the power output shaft to pass through is provided at the center of the first mounting position, and a first annular step surface is provided in the circumference of the first mounting position, and an annular convexity is provided on the power output shaft, and the bottom surface of the outer ring of the first bearing contacts with the first annular step surface, and the top surface of the inner ring of the first bearing contacts with the bottom surface of the annular convexity.

[0007] Furthermore, an annular oil seal is provided on the first mounting position, and the annular oil seal is sleeved on the annular convex part of the power output shaft.

[0008] Furthermore, the plastic cover is provided with a second mounting position for mounting a second bearing, the second mounting position is provided with a second annular step surface, and the bottom surface of the second bearing is in contact with the second annular step surface.

[0009] Furthermore, both ends of the first-stage bevel gear and the second-stage gear are respectively mounted on the aluminum box body and the plastic cover body through bearings.

[0010] Furthermore, the first bearing is a deep groove ball bearing, and the second bearing is a rolled bearing.

[0011] Compared with the prior art, the advantages of the utility model are: the utility model adopts a structure composed of an aluminum box and a plastic cover, which can not only ensure good load-bearing capacity and help the motor dissipate heat, but also reduce costs. First, the aluminum box has good strength and good load-bearing capacity, and can withstand the pressure brought by the bottom installation. Moreover, the aluminum box has good heat dissipation. The outer rotor brushless motor is installed on the aluminum box for convenient heat dissipation and is not easy to burn. Furthermore, the power output shaft is installed on the aluminum box through the first bearing, so that the power output shaft transfers most of the load-bearing force to the aluminum box through the first bearing, so that the cover does not need to bear a large load-bearing force and can be made of plastic, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0013] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is a cross-sectional view of the utility model;

[0016] Figure 3 It is an exploded view of the utility model;

[0017] Figure 4This is a schematic diagram of the structure of the aluminum box of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the plastic cover of the utility model;

[0019] As shown in the figure, 1 aluminum box, 1.1 first mounting position, 1.2 shaft hole, 1.3 first annular step surface, 2 plastic cover, 2.1 second mounting position, 2.2 second annular step surface, 3 outer rotor brushless motor, 3.1 helical gear, 4 transmission assembly, 4.1 first helical gear, 4.2 second gear, 4.3 third gear, 5 power output shaft, 5.1 annular cam, 6 first bearing, 7 second bearing, 8 annular oil seal. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with specific implementation methods.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, which indicate orientations or positional relationships, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] like Figure 1-5 As shown, the utility model provides a gearbox for an ice maker, comprising an outer rotor brushless motor 3, a power output shaft 5, a transmission assembly 4, an aluminum case 1 and a plastic cover 2, wherein the aluminum case 1 is detachably connected to the plastic cover 2, the outer rotor brushless motor 3 is mounted on the aluminum case 1, the output end of the outer rotor brushless motor 3 is connected to the power output shaft 5 through the transmission assembly 4, one end of the power output shaft 5 is mounted on the aluminum case 1 through a first bearing 6, and the aluminum case 1 axially supports the first bearing 6 and the power output shaft 5, the other end of the power output shaft 5 is mounted on the plastic cover 2 through a second bearing 7, and the power output shaft 5 is used for transmission connection to a screw on the ice maker.

[0026] The utility model adopts a structure composed of an aluminum box body 1 and a plastic cover body 2, which can not only ensure good load-bearing capacity and help the motor dissipate heat, but also reduce costs. First, the aluminum box body 1 has good strength and good load-bearing capacity, and can withstand the pressure brought by the lower installation. Moreover, the aluminum box body 1 has good heat dissipation. The outer rotor brushless motor 3 is installed on the aluminum box body 1 for convenient heat dissipation and is not easy to burn. Furthermore, the power output shaft 5 is installed on the aluminum box body 1 through the first bearing 6, so that the power output shaft 5 transfers most of the load-bearing force to the aluminum box body 1 through the first bearing 6, so that the cover body does not need to bear a large load-bearing force and can be made of plastic, thereby reducing costs.

[0027] Among them, see Figure 2 , 3 The output end of the outer rotor brushless motor 3 is provided with a helical gear 3.1, and the transmission assembly 4 includes a primary helical gear 4.1 meshing with the helical gear 3.1, a secondary gear 4.2 meshing with the primary helical gear 4.1, and a tertiary gear 4.3 meshing with the secondary gear 4.2. The tertiary gear 4.3 is locked in the power output shaft 5. The outer rotor brushless motor 3 drives the helical gear 3.1 to sequentially transmit the primary helical gear 4.1, the secondary gear 4.2, and the tertiary gear 4.3, thereby rotating the power output shaft 5 to output power.

[0028] Among them, see Figure 2 , 4The aluminum housing 1 is provided with a first mounting position 1.1 for mounting a first bearing 6, the first mounting position 1.1 opening is upward, and an axial hole 1.2 for the power output shaft 5 to pass through is provided at the center of the first mounting position 1.1, a first annular step surface 1.3 is provided in the circumference of the first mounting position 1.1, and an annular convex 5.1 is provided on the power output shaft 5, the bottom surface of the outer ring of the first bearing 6 contacts the first annular step surface 1.3, and the top surface of the inner ring of the first bearing 6 contacts the bottom surface of the annular convex 5.1, and the first annular step surface 1.3 plays an axial supporting role for the first bearing 6, and the first bearing 6 plays an axial supporting role for the power output shaft 5, so that the axial bearing force of the power output shaft 5 is transmitted to the aluminum housing 1 through the first bearing 6, and the aluminum housing 1 has good strength, so that the cover body does not need to bear a large bearing force, and can be made of plastic, thereby reducing the cost.

[0029] Among them, see Figure 1-3 An annular oil seal 8 is provided on the first installation position 1.1, and the annular oil seal 8 is sleeved on the annular convexity 5.1 of the power output shaft 5 to play a role of sealing protection.

[0030] Among them, see Figure 2 , 5 The plastic cover body 2 is provided with a second mounting position 2.1 for mounting a second bearing 7. The second mounting position 2.1 is open upward and is provided with a second annular step surface 2.2. The bottom surface of the second bearing 7 is in contact with the second annular step surface 2.2, which not only reduces the axial bearing force, but also ensures that the power output shaft 5 can rotate along the axis to reduce wear.

[0031] The two ends of the first helical gear 4.1 and the second helical gear 4.2 are respectively mounted on the aluminum box 1 and the plastic cover 2 through bearings, ensuring that the first helical gear 4.1 and the second helical gear 4.2 can rotate along the axis, reducing wear and extending service life.

[0032] The first bearing 6 is a deep groove ball bearing, and the second bearing 7 is a rolled bearing. Both the deep groove ball bearing and the rolled bearing have good load-bearing capacity and can reduce axial pressure.

[0033] When in use, the power output shaft 5 is connected to the lower end of the screw on the ice maker, and the outer rotor brushless motor 3 drives the bevel gear 3.1 to sequentially transmit the first-stage bevel gear 4.1, the second-stage gear 4.2, and the third-stage gear 4.3, thereby rotating the power output shaft 5 to drive the screw to rotate and squeeze out ice cubes. During operation, the screw will apply pressure to the power output shaft 5, and the power output shaft 5 transfers most of the pressure to the aluminum box body 1 through the first bearing 6, so that the cover body does not need to bear a lot of pressure and can be made of plastic, thereby reducing the cost.

[0034] Unless otherwise specified, the materials, reagents and experimental equipment involved in the embodiments of the present invention are all commercially available products in the field of gearbox technology.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A gear box for an ice maker, characterized in that: It includes an outer rotor brushless motor, a power output shaft, a transmission assembly, an aluminum case and a plastic cover. The aluminum case and the plastic cover are detachably connected. The outer rotor brushless motor is installed on the aluminum case. The output end of the outer rotor brushless motor is connected to the power output shaft through the transmission assembly. One end of the power output shaft is installed on the aluminum case through a first bearing, and the aluminum case axially supports the first bearing and the power output shaft. The other end of the power output shaft is installed on the plastic cover through a second bearing.

2. The gear box for ice making machine according to claim 1, characterized in that: The output end of the outer rotor brushless motor is provided with a helical gear, and the transmission assembly includes a primary helical gear meshing with the helical gear, a secondary gear meshing with the primary helical gear, and a tertiary gear meshing with the secondary gear, and the tertiary gear is locked on the power output shaft.

3. The gear box for ice making machine according to claim 1, characterized in that: The aluminum box body is provided with a first mounting position for mounting a first bearing, an axial hole for the power output shaft to pass through is provided at the center of the first mounting position, a first annular step surface is provided in the circumference of the first mounting position, an annular convexity is provided on the power output shaft, the bottom surface of the outer ring of the first bearing contacts with the first annular step surface, and the top surface of the inner ring of the first bearing contacts with the bottom surface of the annular convexity.

4. The gear box for ice making machine according to claim 3, characterized in that: An annular oil seal is arranged on the first installation position, and the annular oil seal is sleeved on the annular convex part of the power output shaft.

5. The gear box for ice making machine according to claim 1, characterized in that: The plastic cover is provided with a second mounting position for mounting a second bearing, the second mounting position is provided with a second annular step surface, and the bottom surface of the second bearing contacts the second annular step surface.

6. The gear box for ice making machine according to claim 2, characterized in that: The two ends of the first-stage helical gear and the second-stage gear are respectively mounted on the aluminum box body and the plastic cover body through bearings.

7. The gear box for ice making machine according to claim 1, characterized in that: The first bearing is a deep groove ball bearing, and the second bearing is a rolled bearing.

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