Gearbox and refrigerator ice crusher using the same

Abstract

The utility model discloses a gear box and the refrigerator ice crusher of using it, include: gear box, be located in the motor gear drive system of gear box and be located outside gear box and be suitable for with motor gear drive system's motor electric connection's circuit board subassembly, gear box includes the shell and shell cover suitable for matching to form the containing cavity, and the motor gear drive system is located in the containing cavity, and circuit board subassembly includes circuit box, the circuit board body of built -in in circuit box and the inner link line and outer link line be connected with circuit board body respectively, wherein the inner link line is suitable for partial penetration gear box and is inserted to the containing cavity in the connection with motor.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a gearbox and a refrigerator ice crusher using the same. Background Technology

[0002] Gearboxes are mostly driven by DC motors, and often require a built-in circuit board with a rectifier bridge and thermistor to convert the AC power from the host device into DC power for use.

[0003] In most existing designs, the circuit board or thermistor is placed directly in the same space as the DC motor. While this design makes the overall structure compact, it poses safety hazards during use. Firstly, when the DC motor runs for extended periods, it generates heat. If the electronic components on the circuit board or the thermistor on the connecting wires are in the same space as the motor, the heat generated by the motor will be transferred to these electronic components, affecting their lifespan. This is especially true for thermistors, as the heat transferred from the motor will raise the temperature they sense, affecting their normal operation. Secondly, since the circuit board or thermistor is directly sealed within the same housing as the motor and gear set, if any electronic component on the circuit board fails during production, assembly, or use, the entire gearbox housing must be disassembled, making maintenance and disassembly extremely inconvenient.

[0004] In response, CN203248693U discloses a novel motor reduction gearbox, in which the circuit board is mounted on the gearbox cover, preventing the circuit board and motor from being directly housed in the same space. This prevents the heat generated by the motor from being directly transferred to the electronic components on the circuit board, thus reducing the impact of the heat generated by the motor on the circuit board. However, for this disclosed technology, since the power output shaft is assembled with the circuit board via a cam, an adaptive fit is formed between the circuit board and the power output shaft. Different power output shafts require different circuit boards, and a complex disassembly process is still required when the circuit board malfunctions. Furthermore, the directly externally mounted circuit board is easily damaged during actual use, requiring an external protective cover for protection. Therefore, after the circuit board and gearbox cover are assembled, the disassembly and reassembly of the protective cover and gearbox cover must be considered separately.

[0005] In summary, based on the problems existing in the actual disassembly, assembly, and use of the current gearbox, its overall structure still needs to be optimized. Utility Model Content

[0006] The primary objective of this invention is to provide a gearbox that addresses the technical problem of optimizing its overall structure.

[0007] The primary objective of this invention is to provide a refrigerator ice crusher that addresses the technical problem of optimizing the overall structure of its gearbox.

[0008] The gearbox of this utility model is implemented as follows:

[0009] A gearbox includes: a gearbox body, a motor gear transmission system disposed within the gearbox body, and a circuit board assembly disposed outside the gearbox body and adapted to be electrically connected to the motor gear transmission system.

[0010] The gearbox housing includes a shell and a cover adapted to mate to form a receiving cavity; the motor gear transmission system is disposed within the receiving cavity; and

[0011] The circuit board assembly includes a circuit box, a circuit board body built into the circuit box, and internal and external connecting wires respectively connected to the circuit board body; wherein the internal connecting wire is adapted to partially penetrate the gearbox body and be inserted into the receiving cavity to connect to the motor.

[0012] In an optional embodiment of this utility model, the circuit box includes a lower box body suitable for inserting a circuit board and an upper box cover for mating with the lower box body; wherein

[0013] The lower box body and the upper box cover are adapted to be welded together to seal and fix the circuit board body inside the circuit box.

[0014] In an optional embodiment of this utility model, the outer wall of the circuit box is further provided with a connecting part for fastening with the cover, and the cover is designed with a fixing part adapted to the connecting part;

[0015] The connecting part is connected to the fixing part by fasteners.

[0016] In an optional embodiment of this utility model, the connecting part includes at least one protruding connecting piece provided on the outer side wall of the upper cover and / or the lower box body;

[0017] Each of the connecting pieces has a connecting hole for fitting fasteners.

[0018] In an optional embodiment of this utility model, the end face edge of the lower box body for welding with the upper box cover is provided with a circumferentially arranged, concave welding groove; and

[0019] The upper box cover is designed with welding ribs suitable for welding with the welding groove.

[0020] In an optional embodiment of this utility model, the upper cover and the lower body cooperate to form a first slot suitable for the internal connecting wire to pass through; and

[0021] The inner connecting line is fitted with a first sealing plug suitable for sealing and engaging with the inner wall of the first slot.

[0022] In an optional embodiment of this utility model, the upper cover and the lower body cooperate to form a second slot suitable for the passage of an external connecting wire; and

[0023] A second sealing plug is fitted onto the external connecting line, suitable for sealing and engaging with the inner wall of the second slot.

[0024] In an optional embodiment of this utility model, the side wall of the housing is provided with a through hole suitable for the internal connecting wire to pass through; and

[0025] A third sealing plug suitable for sealing and engaging with the inner wall of the through hole is fitted on the inner connecting line.

[0026] In an optional embodiment of this utility model, the circuit box is further provided with a slot assembly for mounting the circuit board.

[0027] The slot assembly includes at least a lower limiting groove disposed within the lower housing and embedded in the side end face portion of the circuit board in the thickness direction.

[0028] In an optional embodiment of this utility model, the card slot assembly further includes an upper limit slot disposed in the upper cover and adapted to be embedded in the side end face of the circuit board in the thickness direction.

[0029] The refrigerator ice crusher of this utility model works as follows:

[0030] A refrigerator ice crusher includes: the gearbox.

[0031] By adopting the above technical solution, this utility model has the following beneficial effects: The gearbox and the refrigerator ice crusher using it of this utility model respectively place the motor gear transmission system and the circuit board assembly on the inner and outer sides of the gearbox body, avoiding the influence of the heat generated by the motor operation in the motor gear transmission system on the components on the circuit board assembly, thereby extending the service life of the circuit board body. Furthermore, based on this structure, when the circuit board assembly needs to be disassembled, it is not necessary to disassemble the gearbox body, thus improving the convenience and efficiency of maintenance and disassembly / reassembly.

[0032] Furthermore, the design of the external circuit board assembly allows the entire circuit board assembly to be designed as a separate module. The circuit board assembly only needs to be connected to the motor gear transmission system through internal connecting wires, and there are no requirements on the general size and assembly method of the entire circuit board assembly. Therefore, the circuit board assembly can be adapted to a variety of different gearboxes, thereby improving the adaptability of the circuit board assembly to different gearboxes. Attached Figure Description

[0033] Figure 1 This is an exploded structural diagram of the gearbox of this utility model;

[0034] Figure 2 This is an exploded structural diagram of the circuit board assembly and housing cover of the gearbox of this utility model.

[0035] Figure 3 This is a schematic diagram of the mating structure between the circuit board assembly and the housing cover of the gearbox of this utility model.

[0036] Figure 4 This is an exploded structural diagram of the circuit board assembly of the gearbox of this utility model.

[0037] Figure 5 This is an exploded structural diagram of the circuit board body and the circuit box body of the circuit board assembly of the gearbox of this utility model.

[0038] Figure 6 This is a schematic diagram of the lower housing of the gearbox of this utility model;

[0039] Figure 7 This is a first-view structural schematic diagram of the upper cover of the gearbox of this utility model;

[0040] Figure 8 This is a second-view structural schematic diagram of the upper cover of the gearbox of this utility model;

[0041] Figure 9 This is a schematic diagram of the circuit board of the gearbox of this utility model.

[0042] In the figure: housing 11, housing cover 12, fixing part 13, motor 21, gear transmission assembly 22, circuit board 31, internal connecting wire 32, external connecting wire 33, third sealing plug 41, first sealing plug 42, second sealing plug 43, lower box body 51, upper box cover 52, welding groove 53, welding rib 54, positioning post 55, positioning hole 56, protruding rib 57, upper limit groove 58, lower limit groove 59, connecting piece 6, connecting hole 61, fastener 7, first slot hole 81, second slot hole 82. Detailed Implementation

[0043] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0044] Example 1:

[0045] Please see Figures 1 to 9 As shown, this embodiment provides a gearbox, including: a gearbox body, a motor gear transmission system disposed within the gearbox body, and a circuit board assembly disposed outside the gearbox body and adapted to be electrically connected to the motor gear transmission system.

[0046] The gearbox housing includes a housing 11 and a cover 12 adapted to mate to form a receiving cavity; the motor gear transmission system is disposed within the receiving cavity. The motor gear transmission system generally includes a motor 21 and a gear transmission assembly 22 connected to the motor 21. The structure and principle of the motor 21 and the gear transmission assembly 22 can be achieved using any mature method from the prior art; this embodiment does not make any improvements and therefore does not impose absolute limitations. Furthermore, the assembly and mating method between the gearbox housing and the motor gear transmission system can also employ any mature method from the prior art; this embodiment also does not impose absolute limitations in this regard.

[0047] Based on the above, the following section will focus on the circuit board assembly used in this embodiment:

[0048] First, the circuit board assembly is externally mounted relative to the gearbox, not occupying internal space and eliminating the need to consider compatibility issues between the gearbox and the circuit board assembly. Therefore, the motor gear drive system and the circuit board assembly are positioned on the inner and outer sides of the gearbox, respectively, preventing the heat generated by the motor 21 in the motor gear drive system from affecting the components on the circuit board 31, thus extending the lifespan of the circuit board 31. Furthermore, this structure eliminates the need to disassemble the gearbox when the circuit board assembly needs to be removed, improving the convenience and efficiency of maintenance and disassembly.

[0049] Secondly, referring to the accompanying drawings, in one specific optional scenario, the circuit board assembly includes a circuit box, a circuit board body 31 built into the circuit box, and internal connecting wires 32 and external connecting wires 33 respectively connected to the circuit board body 31; wherein the internal connecting wire 32 is adapted to partially penetrate the gearbox body and be inserted into the receiving cavity to connect to the motor 21. The external connecting wire 33 is used to connect to the product terminal using the gearbox, such as, but not limited to, a refrigerator ice crusher. The internal connecting wires 32 and external connecting wires 33 are staggered within the circuit board box to reduce the stress on the solder joints of the internal connecting wires 32 and external connecting wires 33 at the circuit board body 31.

[0050] Based on the above structure, it is necessary to explain that, for the fit between the gearbox body and the inner connecting line 32, a through hole is provided on the side wall of the housing 11 for the inner connecting line 32 to pass through; and a third sealing plug 41 is fitted on the inner connecting line 32 to seal against the inner wall of the through hole. The overall third sealing plug 41 is generally cylindrical, made of an elastic material such as, but not limited to, rubber, and has an axially penetrating shaft hole for the inner connecting line 32 to pass through, so that the outer wall of the third sealing plug 41 forms an interference fit with the through hole, and the shaft hole also forms an interference fit with the inner connecting line 32.

[0051] Based on the above structure, the design of the external circuit board assembly allows the entire circuit board assembly to be a separate module design. The circuit board assembly only needs to be connected to the motor 21 through the internal connecting wire 32, and there are no requirements for the general specifications and dimensions of the entire circuit board assembly or the assembly method. Therefore, the circuit board assembly can be adapted to a variety of different gearboxes, thereby improving the adaptability of the circuit board assembly to different gearboxes.

[0052] Furthermore, the circuit box includes a lower box body 51 suitable for housing the circuit board 31 and an upper box cover 52 for mating with the lower box body 51; wherein the lower box body 51 and the upper box cover 52 are suitable for welding together to seal and fix the circuit board 31 inside the circuit box. The lower box body 51 has a certain depth, that is, the circuit board 31 is mainly built into the lower box body 51, and the upper box cover 52 is mainly used to cooperate with the lower box body 51 so that the space accommodating the circuit board body can form a sealed environment.

[0053] Based on the above structure, regarding the compatibility between the circuit box and the internal connecting line 32 and the external connecting line 33:

[0054] The upper cover 52 and the lower body 51 cooperate to form a first slot 81 suitable for the inner connecting wire 32 to pass through. This can be understood as a circular first slot 81. Arc-shaped slots are respectively provided on the upper cover 52 and the lower body 51, thus forming the complete first slot 81 through the cooperation of the upper cover 52 and the lower body 51. Similarly, the upper cover 52 and the lower body 51 cooperate to form a second slot 82 suitable for the outer connecting wire 33 to pass through. The forming method of the second slot 82 can refer to that of the first slot. Based on this structure, a first sealing plug 42 suitable for sealing with the inner wall of the first slot 81 is fitted on the inner connecting wire 32. A second sealing plug 43 suitable for sealing with the inner wall of the second slot 82 is fitted on the outer connecting wire 33. The situation regarding the first sealing plug 42 and the second sealing plug 43 can be referred to the situation regarding the third sealing plug 41. The cooperation method between the first sealing plug 42 and the first slot 81 and the inner connecting line 32, and the cooperation method between the second sealing plug 43 and the second slot 82 and the inner and outer connecting lines 33 can also be referred to the cooperation method between the third sealing plug 41 and the through hole and the inner connecting line 32.

[0055] Furthermore, it should be noted that, in order to better ensure the sealing reliability of the space formed by the lower housing 51 and the upper cover 52 for accommodating the circuit board 31, the lower housing 51 in this embodiment has a circumferentially arranged, concave welding groove 53 on the edge of the end face for welding with the upper cover 52; and the upper cover 52 is designed with welding ribs 54 suitable for welding with the welding grooves 53. The cooperation between the welding grooves 53 and the welding ribs 54 provides sufficient operating space for the welding operation, ensuring proper welding.

[0056] It should also be noted that, in order to ensure that the lower box body 51 and the upper box cover 52 do not shift in relative position during the welding process, this embodiment also incorporates the following design:

[0057] A positioning post 55 is provided at at least one diagonal point on the end face of the lower box body 51 facing the upper box cover 52. Correspondingly, a positioning hole 56 is provided on the end face of the upper box cover 52 facing the lower box body 51, which mates with each positioning post 55 in a one-to-one manner. Thus, when the positioning post 55 is partially inserted into the positioning hole 56, the mating position of the upper box cover 52 and the lower box body 51 is determined, thereby improving the efficiency of the welding operation.

[0058] Based on the above, further regarding the assembly and fixing of the circuit board body 31:

[0059] The circuit box also includes a slot assembly for mounting the circuit board 31 to prevent the circuit board 31 from becoming loose or displaced in the circuit and inside; generally, the slot assembly includes at least a lower limiting groove 59 provided in the lower box 51 that is suitable for embedding into the side end face of the circuit board 31 in the thickness direction.

[0060] From the perspective of simplifying the structure while still meeting the requirement of fixing the circuit board 31, for the circuit board 31 placed in the lower housing 51, for example, a roughly rectangular circuit board 31, one longitudinal side end face of the circuit board 31 is in contact with the bottom wall of the internal cavity of the lower housing 51, while a pair of width side end faces of the circuit board 31 are in contact with a pair of side walls of the internal cavity of the lower housing 51. In this case, a lower limiting groove 59 can be designed only on the pair of width side end faces of the circuit board 31 in the internal cavity of the lower housing 51, without limiting the longitudinal side end faces of the circuit board 31.

[0061] Regarding the limiting groove itself, from the perspective of ease of processing, it includes a pair of relatively arranged protruding ribs 57, which are joined by the side walls of the internal cavity of the lower box 51 to form a roughly U-shaped groove.

[0062] Based on the above, when the end face of the upper cover 52 facing the lower box body 51 also has a certain depth, the slot assembly further includes an upper limit groove 58 provided in the upper cover 52, which is suitable for embedding in the side end face portion of the circuit board body 31 in the thickness direction. Regarding the upper limit groove 58 here, it can be a corresponding lower limit groove 59, that is, the upper limit groove 58 is only provided on a pair of side end faces in the width direction corresponding to the circuit board body 31. The upper limit groove 58 itself can also be a pair of opposing ribs 57.

[0063] Based on the above structure, and in detail with reference to the accompanying drawings, the spacing d1 between a pair of protruding ribs 57 along the thickness direction of the circuit board 31 should be between 1t and 1.25t, preferably 1.19t, where t is the thickness of the circuit board 31; and the height h of the protruding ribs 57 is between 2.0 and 2.5mm, so that the distance d2 between a pair of protruding ribs 57 in the lower housing 51 is less than the length d3 of the circuit board 31, and d2 is also greater than the length d4 occupied by the components on the circuit board 31. This design ensures that the components on the circuit board 31 are not interfered with, while facilitating the installation and fixing of the circuit board 31.

[0064] Next, regarding the fit between the circuit board assembly and the gearbox housing, the structural diagram of this embodiment illustrates one possible scenario:

[0065] The outer wall of the circuit box is also provided with a connecting part for fastening with the cover 12, and the cover 12 is designed with a fixing part 13 adapted to the connecting part; the connecting part is connected to the fixing part 13 by fasteners 7, such as, but not limited to, screws.

[0066] Generally speaking, the connecting part includes at least one protruding connecting piece 6 provided on the outer side wall of the upper cover 52 and / or the lower cover 51; each connecting piece 6 has a connecting hole 61 adapted to a fastener. The shape of the connecting piece 6 is not absolutely limited in this embodiment; the accompanying drawings only illustrate the case of a dovetail shape.

[0067] Since the upper cover 52 and the lower body 51 are welded together to form a reliable integral part, theoretically, it is sufficient to design a protruding connecting piece 6 on the outer side wall of the upper cover 52 or the lower body 51 to meet the usage requirements. However, in this embodiment, with reference to the accompanying drawings, an optional case is provided, in which the upper cover 52 and the lower body 51 are respectively provided with connecting pieces 6 suitable for stacking and connecting to the fixing part 13 by fasteners. In this case, the fit between the upper cover 52 and the lower body 51 is reinforced by the connection between the connecting piece 6 and the fixing part 13 on the basis of welding, thereby improving the reliability of the overall circuit board assembly during long-term use.

[0068] In summary, the gearbox of this embodiment not only facilitates the assembly process of the circuit board assembly and the gearbox body, but also improves the convenience and efficiency of the circuit board assembly maintenance process.

[0069] Example 2:

[0070] Based on the gearbox of Embodiment 1, this embodiment provides a refrigerator ice crusher, including: the gearbox of Embodiment 1.

[0071] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0072] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0075] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0076] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A gearbox, characterized in that, include: Gearbox housing, motor gear drive system disposed within the gearbox housing, and circuit board assembly disposed outside the gearbox housing and adapted for electrical connection with the motor gear drive system. The gearbox housing includes a shell and a cover adapted to mate to form a receiving cavity; the motor gear transmission system is disposed within the receiving cavity; and The circuit board assembly includes a circuit box, a circuit board body built into the circuit box, and internal and external connecting lines respectively connected to the circuit board body. The internal connecting wire is adapted to partially pass through the gearbox body and then be inserted into the receiving cavity to connect with the motor.

2. The gearbox according to claim 1, characterized in that, The circuit box includes a lower box body suitable for inserting a circuit board and an upper box cover for mating with the lower box body; wherein The lower box body and the upper box cover are adapted to be welded together to seal and fix the circuit board body inside the circuit box.

3. The gearbox according to claim 2, characterized in that, The outer wall of the circuit box is also provided with a connecting part for fastening with the cover, and the cover is designed with a fixing part that adapts to the connecting part. The connecting part is connected to the fixing part by fasteners.

4. The gearbox according to claim 3, characterized in that, The connecting part includes at least one protruding connecting piece provided on the outer side wall of the upper box cover and / or the lower box body; Each of the connecting pieces has a connecting hole for fitting fasteners.

5. The gearbox according to any one of claims 2 to 4, characterized in that, The lower housing has a circumferentially recessed welding groove along its end face edge for welding with the upper housing cover; and The upper box cover is designed with welding ribs suitable for welding with the welding groove.

6. The gearbox according to claim 2, characterized in that, The upper cover and lower body cooperate to form a first slot suitable for the internal connecting wire to pass through; and The inner connecting line is fitted with a first sealing plug suitable for sealing and engaging with the inner wall of the first slot.

7. The gearbox according to claim 2 or 6, characterized in that, The upper cover and lower body cooperate to form a second slot suitable for external connection cables to pass through; and A second sealing plug is fitted onto the external connecting line, suitable for sealing and engaging with the inner wall of the second slot.

8. The gearbox according to claim 1 or 6, characterized in that, The sidewall of the housing is provided with through holes suitable for the internal connecting wires to pass through; and A third sealing plug suitable for sealing and engaging with the inner wall of the through hole is fitted on the inner connecting line.

9. The gearbox according to claim 2, characterized in that, The circuit box is also equipped with a slot assembly for mounting the circuit board. The slot assembly includes at least a lower limiting groove disposed within the lower housing and embedded in the side end face portion of the circuit board in the thickness direction.

10. The gearbox according to claim 9, characterized in that, The card slot assembly also includes an upper limit slot that is embedded in the side end face of the upper cover in the direction of the circuit board thickness.

11. A refrigerator ice crusher, characterized in that, include: The gearbox as described in any one of claims 1 to 10.

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