Put the drive motor into the sub-cabinet to drive the Y-axis lifting structure of the refrigerator

Abstract

This utility model belongs to the field of refrigeration equipment technology and discloses a structure for lifting the Y-axis of a freezer by placing a drive motor inside an auxiliary cabinet. The structure includes a freezer, an auxiliary cabinet, a synchronous shaft, an L-shaped bearing housing, and a driven wheel assembly. A drive assembly is installed inside the auxiliary cabinet, comprising a stepper motor and a reducer connected to the motor's output end. A large synchronous wheel is installed at the output end of the reducer. The synchronous shaft is mounted inside the freezer near the top via flange bearing housings and L-shaped bearing housings, respectively. A synchronous wheel is mounted on the synchronous shaft, and the flange bearing housings are fixedly installed inside the auxiliary cabinet. This utility model effectively saves space in the freezer body by placing the stepper motor and reducer inside the auxiliary cabinet, while also facilitating centralized wiring and maintenance. A cover covers the stepper motor terminals and the gap in the outer casing, forming a waterproof and dustproof isolation structure, improving the motor's operational reliability in low-temperature and high-humidity environments.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment technology, and in particular to a structure that places a drive motor inside an auxiliary cabinet to drive the Y-axis lifting of a freezer. Background Technology

[0002] In existing cold chain equipment, the lifting mechanism of a freezer typically uses a drive method where the motor is directly mounted on the freezer body, and lifting control in the Y-axis direction is achieved through transmission mechanisms such as lead screws, chains, or synchronous belts. However, this traditional structure has several problems: First, due to the limited space in the freezer, the placement of the motor and its accessories is restricted, resulting in a compact overall structure and inconvenient maintenance; second, the motor is exposed to the humid environment outside or inside the freezer, making it susceptible to corrosion from condensation and affecting its service life. Furthermore, existing freezer lifting mechanisms often use open bearing supports, lacking proper sealing and lubrication design, which can easily lead to wear and tear during long-term operation, reducing system reliability. Utility Model Content

[0003] The main purpose of this utility model is to provide a structure that places the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer. This aims to solve the technical problems that the limited space in the freezer restricts the arrangement of the motor and its auxiliary components, resulting in a compact overall structure and inconvenient maintenance; secondly, the motor is exposed to the humid environment outside or inside the freezer and is easily corroded by condensation, affecting its service life.

[0004] To achieve the aforementioned objectives of this utility model, the first aspect of this utility model proposes a structure for lifting and lowering the Y-axis of a freezer by placing a drive motor inside a secondary cabinet, comprising:

[0005] Refrigerator, auxiliary cabinet, synchronous shaft, L-shaped bearing housing and driven wheel assembly;

[0006] The auxiliary cabinet is equipped with a drive assembly, which includes a stepper motor and a reducer connected to the output end of the motor.

[0007] A large synchronous pulley is installed at the output end of the reducer;

[0008] The synchronous shaft is installed at both ends inside the refrigerator near the top via flange bearing seats and L-shaped bearing seats, respectively. A synchronous pulley is installed on the synchronous shaft, and the flange bearing seats are fixedly installed inside the auxiliary cabinet.

[0009] The small synchronous pulley is installed at one end of the synchronous shaft that extends into the auxiliary cabinet, and the small synchronous pulley is connected to the large synchronous pulley via a second synchronous belt.

[0010] The synchronous pulley is connected to the driven pulley group via a first synchronous belt;

[0011] The stepper motor of the auxiliary cabinet is equipped with a cover to form a moisture-proof isolation structure.

[0012] Furthermore, the cover is a metal stamping part or an engineering plastic part, covering the wiring terminals of the stepper motor and the seams of the housing.

[0013] Furthermore, the stepper motor and the reducer are rigidly connected by a flange, and both are coaxially mounted on the mounting base plate of the auxiliary cabinet.

[0014] Furthermore, the reducer is a planetary gear reducer or a worm gear reducer, with a reduction ratio ranging from 5:1 to 16:1.

[0015] Furthermore, the horizontal support plate of the L-shaped bearing seat is fixed to the top of the inner side of the freezer with bolts, and the vertical support plate supports the end of the synchronous shaft, forming a cantilever support structure.

[0016] Furthermore, the vertical support plate of the L-shaped bearing housing is provided with a grease injection hole and has an embedded sealed ball bearing.

[0017] Furthermore, the diameter ratio of the large synchronous pulley to the small synchronous pulley is 2:1 to 4:1, and the second synchronous belt is a double-sided toothed synchronous belt.

[0018] Furthermore, the small synchronous pulley is fixed to one end of the synchronous shaft by a key connection, and an axial limiting retaining ring is provided in the flange bearing seat at that end.

[0019] Furthermore, the driven wheel assembly includes at least two drive wheels, and the driven wheel assembly is installed at the bottom of the freezer.

[0020] Furthermore, a shock-absorbing rubber pad is provided between the mounting flange of the flange bearing housing and the side wall of the auxiliary cabinet.

[0021] Beneficial effects:

[0022] 1. This utility model discloses a Y-axis lifting structure for a refrigerator by placing the drive motor inside the auxiliary cabinet. By setting the stepper motor and reducer inside the auxiliary cabinet, space in the refrigerator body is effectively saved, while also facilitating centralized wiring and maintenance. The cover covers the stepper motor terminals and the gap in the outer shell, forming a waterproof and dustproof isolation structure, improving the reliability of the motor in low temperature and high humidity environments. This application provides a compact, stable, and easy-to-maintain Y-axis lifting drive structure for refrigerators by optimizing the motor layout, improving the transmission structure, and strengthening bearing support and protection measures. It solves the problems of difficult motor placement, unstable transmission, and susceptibility to environmental influences in the prior art.

[0023] 2. The present invention features a structure that places the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer. The motor and reducer are fixed by a flange rigid connection to ensure that they are installed coaxially, thereby improving transmission efficiency and reducing vibration and noise. The reducer is selected from planetary gears or worm gears, and the reduction ratio range is suitable for a wide range of load requirements, enhancing the versatility and adaptability of the system.

[0024] 3. The present invention features a drive motor placed inside the auxiliary cabinet to drive the Y-axis lifting structure of the refrigerator. The L-shaped bearing seat is equipped with a grease injection hole and a sealed ball bearing, which facilitates regular lubrication and maintenance, prevents dust and moisture from entering, and extends the bearing life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a structure of the present invention in which the drive motor is placed inside the auxiliary cabinet to drive the Y-axis lifting of the freezer.

[0026] Figure 2 This is a schematic diagram of the disassembly of the baffle of the Y-axis lifting structure of the freezer, which is installed in the auxiliary cabinet and drives the drive motor inside the auxiliary cabinet.

[0027] Figure 3 This is a side view schematic diagram of the drive assembly of the Y-axis lifting structure of the freezer, which is a drive motor placed inside the auxiliary cabinet according to an embodiment of the present invention.

[0028] Figure 4 This is an enlarged structural diagram of the drive component of a refrigerator Y-axis lifting structure, which places the drive motor inside the auxiliary cabinet according to an embodiment of the present invention.

[0029] in:

[0030] 1-Refrigerator; 2-Auxiliary cabinet; 3-Synchronous shaft; 4-L-type bearing housing; 5-Synchronous pulley; 6-First synchronous belt; 7-Driven pulley set; 8-Stepper motor; 9-Reducer; 10-Large synchronous pulley; 11-Second synchronous belt; 12-Small synchronous pulley; 13-Flange bearing housing; 14-Baffle.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0033] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0034] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, 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.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can 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 top" of the second 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 second 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.

[0036] Reference Figures 1-4 An embodiment of this utility model provides a structure for placing a drive motor inside an auxiliary cabinet to drive the Y-axis lifting of a freezer, comprising:

[0037] Refrigerator 1, auxiliary cabinet 2, synchronous shaft 3, L-shaped bearing seat 4, and driven wheel assembly 7;

[0038] The auxiliary cabinet 2 is equipped with a drive assembly, which includes a stepper motor 8 and a reducer 9 connected to the output end of the motor.

[0039] A large synchronous pulley 10 is installed at the output end of the reducer 9;

[0040] The synchronous shaft 3 is installed at both ends inside the freezer 1 near the top via flange bearing seats 13 and L-shaped bearing seats 4, respectively. The synchronous shaft 3 is equipped with a synchronous wheel 5, and the flange bearing seats 13 are fixedly installed inside the auxiliary cabinet 2.

[0041] The small synchronous pulley 12 is installed at one end of the synchronous shaft 3 that extends into the interior of the auxiliary cabinet 2. The small synchronous pulley 12 is connected to the large synchronous pulley 10 via the second synchronous belt 11.

[0042] The synchronous pulley 5 is connected to the driven pulley group 7 via the first synchronous belt 6;

[0043] The stepper motor 8 of the auxiliary cabinet 2 is provided with a baffle 14 on the outside to form a moisture-proof isolation structure.

[0044] In this embodiment, a drive assembly is provided inside the auxiliary cabinet 2. The drive assembly includes a stepper motor 8 and a reducer 9 connected to its output end. A large synchronous pulley 10 is installed at the output end of the reducer 9, and is connected to a small synchronous pulley 12 mounted on a synchronous shaft 3 via a second synchronous belt 11. The two ends of the synchronous shaft 3 are fixed to the top of the freezer 1 via flange bearing seats 13 and L-shaped bearing seats 4. The synchronous shaft 3 is also equipped with synchronous pulleys 5, which are connected to a driven pulley group 7 located at the bottom of the freezer 1 via a first synchronous belt 6, thereby realizing the lifting and lowering control of the entire freezer 1 along the Y-axis direction.

[0045] In addition, a cover 14 is provided on the outside of the stepper motor 8 to form a moisture-proof isolation structure and improve the operating stability of the equipment in humid or low-temperature environments.

[0046] As described above, the stepper motor 8 and the reducer 9 are integrated inside the auxiliary cabinet 2. The top of the freezer 1 is connected to the synchronous pulley 5 via the synchronous shaft 3, and cooperates with the driven wheel set 7 at the bottom to form a closed-loop synchronous transmission system. This structure enables the motor power to be stably transmitted to each lifting point of the freezer 1, realizing the synchronous lifting function.

[0047] By moving the motor inside the auxiliary cabinet 2, not only can it prevent water vapor from entering, but it also avoids the problem of limited external space in the freezer 1; moreover, the overall structure is compact and easy to maintain and repair.

[0048] Optionally, the cover 14 is a metal stamping part or an engineering plastic part, covering the wiring terminals of the stepper motor 8 and the seams of the housing.

[0049] The cover 14 covers the wiring terminals and housing gaps of the stepper motor 8, forming a closed protective structure. This further improves the motor's moisture and dust resistance, extends its service life, and prevents condensate from entering the motor, thus avoiding the risk of short circuits.

[0050] In some embodiments, the stepper motor 8 and the reducer 9 are rigidly connected by a flange, and both are coaxially mounted on the mounting base plate of the auxiliary cabinet 2.

[0051] It should be noted that the stepper motor 8 and the reducer 9 are rigidly connected by a flange, and both are mounted coaxially on the mounting base plate of the auxiliary cabinet 2. This rigid connection reduces transmission backlash and improves response speed.

[0052] In some embodiments, the reducer 9 is a planetary gear reducer or a worm gear reducer, with a reduction ratio ranging from 5:1 to 16:1.

[0053] It should be noted that the reducer 9 is preferably a planetary gear reducer or a worm gear reducer, with a reduction ratio range set from 5:1 to 16:1, which can be flexibly adjusted according to load requirements. Planetary reducers have the advantages of small size, high torque, and high efficiency; and the reduction ratio range is adaptable to the lifting requirements of different models of freezers 1, making them highly versatile.

[0054] In some embodiments, the horizontal support plate of the L-shaped bearing seat 4 is fixed to the top of the inner side of the freezer 1 by bolts, and the vertical support plate carries the end of the synchronous shaft 3, forming a cantilever support structure.

[0055] It should be noted that the cantilever support structure saves space and facilitates the arrangement of the synchronous shaft 3; it is easy to install and easy to disassemble and maintain.

[0056] In one example, the vertical support plate of the L-shaped bearing housing 4 has a grease injection hole and a built-in sealed ball bearing for long-term lubrication and dust prevention. The grease injection hole facilitates regular lubrication and maintenance; the sealed ball bearing prevents dust and moisture from entering, thus extending the bearing's lifespan.

[0057] In one example, the diameter ratio of the large synchronous pulley 10 to the small synchronous pulley 12 is set to 2:1 to 4:1, and the second synchronous belt 11 is a double-sided toothed synchronous belt. Double-sided toothed synchronous belts offer smoother transmission and stronger load-bearing capacity; their diameter ratio is also rationally designed, balancing transmission efficiency and space utilization.

[0058] In one example, the small synchronous pulley 12 is fixed to one end of the synchronous shaft 3 by a key connection, and an axial limiting retaining ring is provided in the flange bearing seat 13 at that end. The key connection ensures that the small synchronous pulley 12 rotates synchronously with the synchronous shaft 3 without slippage; the axial limiting retaining ring prevents the small synchronous pulley 12 from axially moving, ensuring stable transmission.

[0059] In some embodiments, the driven wheel assembly 7 includes at least two drive wheels, and the driven wheel assembly 7 is mounted on the bottom of the freezer 1.

[0060] It should be noted that the driven wheel assembly 7 includes at least two drive wheels, which are installed at the bottom of the freezer 1 and are linked to the synchronous wheel 5 via the first synchronous belt 6.

[0061] In one example, a shock-absorbing rubber pad is provided between the mounting flange of the flange bearing housing 13 and the side wall of the auxiliary cabinet 2. The rubber pad can absorb vibration, reduce noise, and protect the connection between the bearing housing and the cabinet from impact damage.

[0062] Instructions: First, the operator should install the freezer 1 and auxiliary cabinet 2 according to the design requirements, ensuring a reliable mechanical connection between them via the synchronous shaft 3 and transmission components. Before starting, check that the stepper motor 8 and reducer 9 are rigidly connected and fixed to the mounting base of the auxiliary cabinet 2 via flanges, and confirm that the second synchronous belt 11 between the large synchronous pulley 10 and the small synchronous pulley 12 is properly tensioned. The synchronous pulley 5 on the synchronous shaft 3 is connected to the driven wheel set 7 at the bottom of the freezer 1 via the first synchronous belt 6. This driven wheel set 7 contains at least two evenly distributed transmission pulleys, used to achieve synchronous lifting and lowering of the entire freezer 1 along the Y-axis. When the equipment is powered on, the stepper motor 8 drives the reducer 9, and the power is transmitted to the synchronous shaft 3 via the second synchronous belt 11 between the large synchronous pulley 10 and the small synchronous pulley 12. The synchronous pulley 5 then drives the first synchronous belt 6 to drive the driven wheel set 7, thereby achieving smooth lifting and lowering control of the freezer 1. During this process, the stepper motor 8 inside the auxiliary cabinet 2 is equipped with a cover 14. This cover 14 is made of metal stamping or engineering plastic and covers the motor terminals and housing gaps, providing good waterproof and dustproof protection to prevent motor failure caused by humid environments. The entire lifting process can be automated by setting the stroke, speed, and position through the control system. During maintenance, grease can be periodically injected through the grease injection hole on the L-shaped bearing seat 4 to extend the bearing's service life and facilitate the disassembly and replacement of related components, ensuring long-term reliable operation of the equipment.

[0063] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A structure for lifting and lowering a freezer along its Y-axis by placing a drive motor inside a secondary cabinet, characterized in that, include: Refrigerated cabinet (1), auxiliary cabinet (2), synchronous shaft (3), L-shaped bearing housing (4) and driven wheel assembly (7); The auxiliary cabinet (2) is equipped with a drive assembly, which includes a stepper motor (8) and a reducer (9) connected to the output end of the motor; The output end of the reducer (9) is equipped with a large synchronous pulley (10); The synchronous shaft (3) is installed at both ends through flange bearing seats (13) and L-shaped bearing seats (4) inside the freezer (1) near the top. A synchronous wheel (5) is installed on the synchronous shaft (3). The flange bearing seats (13) are fixedly installed inside the auxiliary cabinet (2). The small synchronous pulley (12) is installed at one end of the synchronous shaft (3) that extends into the auxiliary cabinet (2). The small synchronous pulley (12) is connected to the large synchronous pulley (10) via the second synchronous belt (11). The synchronous pulley (5) is connected to the driven pulley group (7) via the first synchronous belt (6); The stepper motor (8) of the auxiliary cabinet (2) is provided with a baffle (14) on the outside to form a moisture-proof isolation structure.

2. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The cover (14) is a metal stamping part or an engineering plastic part, covering the wiring terminals of the stepper motor (8) and the seam of the housing.

3. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The stepper motor (8) and the reducer (9) are rigidly connected by a flange, and both are coaxially mounted on the mounting base plate of the auxiliary cabinet (2).

4. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The speed reducer (9) is a planetary gear reducer or a worm gear reducer, with a reduction ratio ranging from 5:1 to 16:

1.

5. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The horizontal support plate of the L-shaped bearing seat (4) is fixed to the top of the inner side of the freezer (1) by bolts, and the vertical support plate carries the end of the synchronous shaft (3) to form a cantilever support structure.

6. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 5, characterized in that, The vertical support plate of the L-shaped bearing housing (4) is provided with a grease injection hole and is fitted with a sealed ball bearing.

7. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The diameter ratio of the large synchronous pulley (10) to the small synchronous pulley (12) is 2:1 to 4:1, and the second synchronous belt (11) is a double-sided toothed synchronous belt.

8. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The small synchronous pulley (12) is fixed to one end of the synchronous shaft (3) by a key connection, and an axial limiting retaining ring is provided in the flange bearing seat (13) at that end.

9. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The driven wheel assembly (7) includes at least two drive wheels and is mounted on the bottom of the freezer (1).

10. The structure for placing the drive motor inside the auxiliary cabinet to drive the Y-axis lifting of the freezer according to claim 1, characterized in that, The mounting flange of the flange bearing housing (13) is provided with a shock-absorbing rubber pad between the mounting flange and the side wall of the auxiliary cabinet (2).

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