Roller support assembly and microwave oven

Abstract

The utility model provides a kind of roller support assembly and microwave oven, the roller support assembly includes support ring body, roller, the lower part of the support ring body is provided with support structure, the lateral wall of the support ring body is provided with assembly shaft, the roller is connected with assembly shaft, the roller can rotate with the axis L of the assembly shaft as rotating shaft, the distance between the lower end of the support structure and the axis L is recorded as K, K>the radius of roller;The utility model can realize that roller does not contact cavity, avoid the design purpose that friction occurs between roller and cavity, also keep the simplicity of existing roller support assembly on structure, and without its structure is greatly disassembled and greatly changed, it is convenient to the actual production and processing of roller support assembly, simultaneously, whether the assembly of roller or the assembly of entire roller support assembly, can effectively reduce the degree of complexity on assembly.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a roller bracket assembly and a microwave oven. Background Technology

[0002] Microwave ovens use high-frequency microwaves emitted by a magnetron to act on water molecules in food. The heat generated by the high-speed movement and friction of the water molecules is used to quickly heat the food, making it an indispensable cooking appliance in modern households.

[0003] Most conventional microwave ovens currently use a bottom-mounted turntable motor drive system. The motor rotates a circular glass turntable inside the cavity, allowing food on the turntable to come into contact with microwaves from multiple angles, thus achieving even heating. To ensure stable operation of the glass turntable, existing technology often uses a roller support assembly between the turntable and the cavity to assist rotation through sliding. (See attached image) Figure 1 , 2 As shown, when the existing roller support assembly works inside the cavity, the roller and the cavity are in direct contact, resulting in rigid friction. This not only causes significant noise, but also damages the cavity substrate due to friction. Under the influence of water vapor or water droplets generated when heating food, the cavity is extremely prone to rust spots. Furthermore, with friction with the roller, rust particles are generated and splashed onto the food, affecting the cooking experience. In more severe cases, it can cause the cavity to wear through, rendering the machine unable to cook properly.

[0004] To address this, the applicant initially improved the structure of the roller support assembly and filed a patent application (CN202422696060.3). This improvement involved replacing the existing roller support with multiple individual roller assemblies and suspending the lower parts of the rollers to prevent them from contacting the cavity, thus resolving issues such as friction and wear between the rollers and the cavity. However, in subsequent production practice, the applicant discovered that while this structure abandoned the traditional roller support assembly, each individual roller assembly presented significant challenges in actual microwave oven production. Not only was the overall structure of each assembly complex, but the corresponding assembly structure was also intricate. Each roller assembly required individual assembly within the microwave oven cavity, increasing the difficulty of actual production and assembly, and hindering cost reduction. Utility Model Content

[0005] In view of this, the present invention aims to provide a roller bracket assembly and a microwave oven to solve the problems of complex assembly structure corresponding to the roller in the prior art, high actual production and processing difficulty of the roller bracket assembly (or roller assembly), and cumbersome assembly.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A roller support assembly includes a support ring and a roller. A support structure is provided at the lower part of the support ring, and an assembly shaft is provided on the side wall of the support ring. The roller is connected to the assembly shaft and can rotate about the axis L of the assembly shaft. The distance between the lower end of the support structure and the axis L is denoted as K, where K > the radius of the roller.

[0008] Furthermore, the support structure is an arc-shaped plate structure concentric with the bracket ring body, and at least three support structures are provided at the lower part of the bracket ring body, arranged in a circular array with the central axis of the bracket ring body as the reference axis.

[0009] Furthermore, the sidewall of the bracket ring is provided with at least three assembly shafts, which are arranged in a circular array with the central axis of the bracket ring as the reference axis. The axis L of any of the assembly shafts is perpendicular to and coplanar with the central axis of the bracket ring.

[0010] Furthermore, the bracket ring, the support structure, and the assembly shaft are integrally formed.

[0011] Furthermore, the roller is detachably connected to the mounting shaft.

[0012] Furthermore, the assembly shaft includes a first shaft portion and a second shaft portion, with a gap between the first shaft portion and the second shaft portion. One end of the first shaft portion is connected to the bracket ring body, and the other end is provided with a first limiting head. One end of the second shaft portion is connected to the bracket ring body, and the other end is provided with a second limiting head.

[0013] Furthermore, the assembly shaft is provided with a reinforcing plate within the gap, and the reinforcing plate is connected to the first shaft portion, the second shaft portion, and the bracket ring body respectively.

[0014] A microwave oven includes the aforementioned roller support assembly.

[0015] Furthermore, the microwave oven includes a cavity, a turntable, and a connector. The connector is disposed on the bottom wall of the cavity, and the end of the connector away from the bottom wall is connected to the turntable to drive the turntable to rotate. The roller support assembly is disposed between the turntable and the bottom wall. The lower surface of the turntable contacts the roller of the roller support assembly, and the upper surface of the bottom wall contacts the support structure of the roller support assembly but does not contact the roller.

[0016] Compared with the prior art, the roller support assembly and microwave oven described in this utility model have the following advantages:

[0017] The present invention discloses a roller bracket assembly and a microwave oven. While maintaining the existing roller bracket assembly structure, it does not require major structural modifications. It only requires an additional support structure to be set at the lower part of the original bracket ring, and K is greater than the radius of the roller. When the roller bracket assembly is set between the cavity and the turntable of the microwave oven, the upper part of the roller contacts the turntable, and the roller bracket assembly contacts the bottom wall of the cavity through the support structure. The lower part of the roller is lifted and suspended by the support structure, so that the roller does not contact the cavity and avoids friction between the roller and the cavity.

[0018] Meanwhile, this application maintains the structural simplicity of existing roller bracket assemblies. The roller only needs to be fitted onto the assembly shaft of the bracket ring, and then the entire roller bracket assembly is placed between the bottom wall of the cavity and the turntable. On the one hand, this facilitates the actual production and processing of the roller bracket assembly, and on the other hand, the entire assembly process can be completed without the participation of any fasteners. Whether it is the assembly of the roller or the assembly of the entire roller bracket assembly, the complexity of the assembly is effectively reduced. Attached Figure Description

[0019] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of a roller support assembly in the prior art;

[0021] Figure 2 This is a schematic cross-sectional view of a roller support assembly in the prior art at any roller.

[0022] Figure 3 This is a schematic diagram of the structure of the microwave oven described in an embodiment of the present invention;

[0023] Figure 4 This is an exploded view of the roller support assembly described in an embodiment of the present invention;

[0024] Figure 5 For the present utility model in Figure 4 A magnified view of a section at point A in the middle;

[0025] Figure 6 This is a cross-sectional schematic diagram of the roller support assembly described in an embodiment of the present invention at any roller.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Door assembly; 2. Control box; 3. Cavity; 31. Bottom wall; 4. Connector; 5. Roller bracket assembly; 51. Bracket ring; 52. Support structure; 53. Assembly shaft; 531. First shaft part; 5311. First limit head; 532. Second shaft part; 5321. Second limit head; 533. Reinforcing plate; 54. Roller; 541. Center mounting hole; 6. Turntable. Detailed Implementation

[0028] The inventive concepts of this disclosure will be described below using terminology commonly used by those skilled in the art to convey the essence of their work to others skilled in the art. However, these inventive concepts may be embodied in many different forms and should not be construed as limited to the embodiments described herein.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other. Furthermore, the directional terms used in this application, such as "up" and "down," refer to the conventional orientation of the microwave oven and the roller support assembly in their normal placement state. Please refer to the appendix for further details. Figure 6 The coordinates in the diagram.

[0030] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] To address the problems of complex assembly structures for rollers, high manufacturing difficulty of roller bracket assemblies (or roller assemblies), and cumbersome assembly in existing technologies, and to prevent contact between the roller and the cavity, thus resolving issues of friction and wear, this embodiment proposes a roller bracket assembly, as shown in the attached figure. Figure 3-6 As shown, the roller support assembly 5 includes a support ring 51 and a roller 54. A support structure 52 is provided at the lower part of the support ring 51, and an assembly shaft 53 is provided on the side wall of the support ring 51. The roller 54 is connected to the assembly shaft 53 and can rotate about the axis L of the assembly shaft 53. The distance between the lower end of the support structure 52 and the axis L is denoted as K, where K > the radius of the roller 54.

[0032] Therefore, this application maintains the existing roller bracket assembly structure without making major structural changes. It only requires adding a support structure 52 to the lower part of the original bracket ring 51 and making K > the radius of the roller 54. When the roller bracket assembly 5 is placed between the microwave oven cavity 3 and the turntable 6, the upper part of the roller 54 contacts the turntable 6, and the roller bracket assembly 5 contacts the bottom wall 31 of the cavity 3 through the support structure 52. This lifts the lower part of the roller 54 off the ground by the support structure 52, achieving the design purpose of preventing the roller 54 from contacting the cavity 3 and avoiding friction between the roller 54 and the cavity 3.

[0033] Meanwhile, this application maintains the structural simplicity of the existing roller bracket assembly. The roller only needs to be fitted onto the assembly shaft 53 of the bracket ring 51, and then the entire roller bracket assembly 5 is placed between the bottom wall 31 of the cavity 3 and the turntable 6. On the one hand, it facilitates the actual production and processing of the roller bracket assembly 5, and on the other hand, the entire assembly process can be completed without the participation of any fasteners. Whether it is the assembly of the roller 54 or the assembly of the entire roller bracket assembly 5, the complexity of the assembly is effectively reduced.

[0034] The support structure 52 can form a complete ring support structure along the lower part of the bracket ring 51, or it can be an arc-shaped support structure with a certain arc length. Preferably, the support structure 52 is an arc-shaped plate structure concentric with the bracket ring 51. At least three support structures 52 are provided at the lower part of the bracket ring 51 and are arranged in a circular array with the central axis of the bracket ring 51 as the reference axis, so that the entire roller bracket assembly 5 can be stably placed on the bottom wall 31 of the microwave oven cavity 3 through the support structure 52.

[0035] Correspondingly, at least three mounting shafts 53 are also provided on the side wall of the bracket ring 51, arranged in a circular array with the central axis of the bracket ring 51 as the reference axis. The axis L of any of the mounting shafts 53 is perpendicular to and coplanar with the central axis of the bracket ring 51. Correspondingly, each mounting shaft 53 is equipped with a roller 54. This allows the turntable 6 to be stably supported by at least three rollers 54 when placed on the roller bracket assembly 5, and to rotate smoothly under the drive of the motor (not shown) and the connector 4.

[0036] The bracket ring 51, the support structure 52, and the assembly shaft 53 are integrally formed. Preferably, the bracket ring 51, the support structure 52, and the assembly shaft 53 are processed into a complete part by an integral injection molding process, which is beneficial to improve the efficiency of production and processing and reduce unnecessary assembly structures.

[0037] To further improve the ease of assembly of the roller 54, for any assembly shaft 53, the assembly shaft 53 includes a first shaft portion 531 and a second shaft portion 532, with a gap 534 formed between the first shaft portion 531 and the second shaft portion 532. One end of the first shaft portion 531 is connected to the bracket ring body 51, and the other end is provided with a first limiting head 5311. One end of the second shaft portion 532 is connected to the bracket ring body 51, and the other end is provided with a second limiting head 5321. Thus, when the assembly shaft 53 is in its normal state, it is only necessary to make the center assembly hole 541 of the roller 54 slightly larger than the common diameter of the two shaft portions in the axial and radial directions. The maximum size formed by the two limiting heads is slightly smaller than the maximum size formed by the two limiting heads in the radial direction. By squeezing the two shafts or limiting heads, the two limiting heads can be brought closer to each other. As the corresponding space size decreases, the two limiting heads can pass through the central mounting hole 541 of the roller 54, so that the roller 54 cooperates with the two shafts. At the same time, the corresponding squeezing force is released, so that the entire assembly shaft 53 returns to normal. The limiting of the two limiting heads can prevent the roller 54 from separating from the entire assembly shaft 53. Of course, if it is necessary to remove the roller 54, the two shafts or limiting heads are squeezed and the roller 54 can be removed.

[0038] However, in order to improve the mechanical properties of the first shaft portion 531 and the second shaft portion 532 and prevent them from breaking under the pressure of compression, the assembly shaft 53 is provided with a reinforcing plate 533 in the gap 534. The reinforcing plate 533 is connected to the first shaft portion 531, the second shaft portion 532 and the bracket ring 51 respectively. Correspondingly, this also helps to improve the mechanical strength of the entire bracket ring 51 to a certain extent.

[0039] This invention further proposes a microwave oven, comprising a cavity 3, a turntable 6, a connector 4, and the roller support assembly 5 described in this embodiment. The connector 4 is disposed on the bottom wall 31 of the cavity 3, and one end of the connector 4 away from the bottom wall 31 is connected to the turntable 6 to drive the turntable 6 to rotate. The roller support assembly 5 is disposed between the turntable 6 and the bottom wall 31. Correspondingly, the lower surface of the turntable 6 contacts the roller 54, and the upper surface of the bottom wall 31 contacts the bottom end of the support structure 52 but does not contact the roller 54. This achieves the support of the turntable 6 by the roller support assembly 5 and also achieves the design objective of preventing the roller 54 from contacting the cavity 3 and avoiding friction between the roller 54 and the cavity 3.

[0040] The technical content proposed in this application can be used for any microwave oven. In addition, based on the technical content provided in this application, the microwave oven also includes conventional components such as a shell, door assembly 1, and control box 2. Since these conventional components are all prior art, they will not be described in detail here.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A roller support assembly, characterized in that, The roller support assembly (5) includes a support ring (51) and a roller (54). A support structure (52) is provided at the lower part of the support ring (51). An assembly shaft (53) is provided on the side wall of the support ring (51). The roller (54) is connected to the assembly shaft (53). The roller (54) can rotate about the axis L of the assembly shaft (53). The distance between the lower end of the support structure (52) and the axis L is denoted as K, where K > the radius of the roller (54).

2. The roller support assembly according to claim 1, characterized in that, The support structure (52) is an arc-shaped plate structure concentric with the bracket ring (51). At least three support structures (52) are provided at the lower part of the bracket ring (51) and are arranged in a circular array with the central axis of the bracket ring (51) as the reference axis.

3. The roller support assembly according to claim 1, characterized in that, The side wall of the bracket ring (51) is provided with at least three assembly shafts (53), which are arranged in a circular array with the central axis of the bracket ring (51) as the reference axis. The axis L of any of the assembly shafts (53) is perpendicular to and coplanar with the central axis of the bracket ring (51).

4. A roller support assembly according to claim 1, characterized in that, The bracket ring (51), the support structure (52), and the assembly shaft (53) are integrally formed.

5. A roller support assembly according to claim 1, characterized in that, The roller (54) is detachably connected to the assembly shaft (53).

6. A roller support assembly according to claim 5, characterized in that, The assembly shaft (53) includes a first shaft portion (531) and a second shaft portion (532), with a gap (534) formed between the first shaft portion (531) and the second shaft portion (532). One end of the first shaft portion (531) is connected to the bracket ring body (51), and the other end is provided with a first limiting head (5311). One end of the second shaft portion (532) is connected to the bracket ring body (51), and the other end is provided with a second limiting head (5321).

7. A roller support assembly according to claim 6, characterized in that, The assembly shaft (53) is provided with a reinforcing plate (533) in the gap (534), and the reinforcing plate (533) is connected to the first shaft part (531), the second shaft part (532), and the bracket ring (51) respectively.

8. A microwave oven, characterized in that, The microwave oven includes the roller support assembly (5) as described in any one of claims 1-7.

9. A microwave oven according to claim 8, characterized in that, The microwave oven includes a cavity (3), a turntable (6), and a connector (4). The connector (4) is disposed on the bottom wall (31) of the cavity (3). One end of the connector (4) away from the bottom wall (31) is connected to the turntable (6) to drive the turntable (6) to rotate. The roller bracket assembly (5) is disposed between the turntable (6) and the bottom wall (31). The lower surface of the turntable (6) contacts the roller (54) of the roller bracket assembly (5), and the upper surface of the bottom wall (31) contacts the support structure (52) of the roller bracket assembly (5) but does not contact the roller (54).

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