Food processor capable of rotating stably

Abstract

The utility model discloses a food processor capable of rotating stably, which relates to the field of life electric appliances and comprises a main machine and a processing component, a motor and a reduction gearbox are arranged in the main machine, and the reduction gearbox comprises a shell provided with a mounting cavity and a gear set arranged in the mounting cavity. The gear set comprises a first gear set in transmission connection with a motor shaft of the motor and a second gear set in transmission connection with an output shaft of the first gear set, a first oil storage groove is formed in the side, close to the second gear set, in the mounting cavity, and a second oil storage groove formed above the first oil storage groove is formed in the outer side of the shell. The first oil storage tank and the second oil storage tank are communicated through the pressure relief hole, when too much lubricating oil is accumulated in the first oil storage tank, the overflowed lubricating oil can overflow outwards into the second oil storage tank through the pressure relief hole and is stored by the second oil storage tank, and meanwhile the lubricating oil in the second oil storage tank flows back into the mounting cavity under the action of gravity. And the lubricating oil consumption of each part in the reduction gearbox is maintained, and the noise deterioration is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a food processing machine with stable rotation. Background Art

[0002] Existing food processors typically include a main unit with a built-in motor and a detachable processing assembly located above the main unit. When using the food processor, the user places the ingredients in the processing cup, and the motor drives the processing parts in the processing assembly to rotate to process the ingredients. However, some ingredients require a large torque to process, such as juicing, kneading noodles, and grinding. Therefore, a reduction gearbox is usually installed in the main unit. The reduction gearbox is connected between the motor and the processing parts, and the torque is increased by reducing the speed of the reduction gearbox to achieve the processing of different ingredients. However, the gears in the reduction gearbox generate a lot of heat during rotation, which causes the pressure in the reduction gearbox to continue to increase, resulting in excessive pressure in the reduction gearbox. In order to balance the pressure inside and outside the reduction gearbox, most manufacturers will open air vents on the reduction gearbox housing. However, when the pressure in the reduction gearbox is too high, the lubricating oil in the gearbox will directly splash out through the air vents.

[0003] In order to solve the above problems, Chinese utility model patent CN202323335165.8 discloses a gearbox, which is provided with a first chamber and a second chamber connected to the lubrication chamber in the reduction box, and the second chamber is connected to the breathable cap. The oil-gas mixture inside the lubrication chamber passes through the first chamber and the second chamber in sequence before reaching the breathable cap, and the oil and gas separation is performed multiple times with the cooperation of the first chamber and the second chamber, so that the load at the breathable cap is small and oil leakage is less likely to occur at the breathable cap. Although the above scheme can reduce the flow rate of lubricating oil overflow, it is found that some lubricating oil still overflows during actual use; for example, Chinese utility model patent CN202221024820.0 only provides a first-level oil storage chamber inside the cavity, and the lubricating oil is collected in the oil storage chamber. The oil storage chamber is on the inner side of the box body. When the oil storage chamber is full of oil, the pressure in the oil storage chamber and its surrounding area will increase, and some oil will still splash out through the air vents, which is not conducive to internal pressure relief. On the one hand, part of the lubricating oil is sprayed outward and directly splashes onto other components in the main engine, causing these components to be contaminated or even unable to be used normally; on the other hand, as the lubricating oil overflows for a long time, the capacity of the lubricating oil in the reduction gearbox is greatly reduced, which will cause the lubrication effect of various components in the reduction gearbox to deteriorate over time, produce abnormal noise, aggravate wear and even damage, seriously affecting the consumer experience. Utility Model Content

[0004] The purpose of the utility model is to provide a food processing machine with stable rotation, so as to solve the problems in existing food processing machines that the lubricating oil in the reduction box easily overflows through the air vents, causing other components in the main machine to be contaminated or even unable to work, and the lubrication effect of various components in the reduction box deteriorates, easily causing abnormal noise and increased wear.

[0005] To achieve the above-mentioned objectives, the utility model provides a food processing machine with stable rotation, comprising a main body and a detachable processing assembly arranged above the main body, a motor and a reduction gearbox transmission-connected between the motor and the processing assembly being provided in the main body, the reduction gearbox comprising a shell provided with an installation cavity and a gear set arranged in the installation cavity, the gear set comprising a first gear set transmission-connected to the motor shaft of the motor and a second gear set transmission-connected to the output shaft of the first gear set, a first oil storage tank being provided in the installation cavity and on one side close to the second gear set, a second oil storage tank being provided above the first oil storage tank being provided on the outside of the shell, and the first oil storage tank and the second oil storage tank being connected through a pressure relief hole.

[0006] The present application provides a motor and a reduction gearbox in a main unit that is transmission-connected between the motor and the processing assembly, so that the torque output by the motor is decelerated by the reduction gearbox before being output to the processing assembly, allowing the processing assembly to output a greater torque to meet user needs. At the same time, the gear set includes a first gear set transmission-connected to the motor shaft of the motor and a second gear set transmission-connected to the output shaft of the first gear set, so that the torque output by the motor is reduced in one stage by the first gear set and then reduced in two stages by the second gear set, achieving multi-stage torque reduction, enabling the processing assembly to output a greater torque for processing difficult-to-process ingredients.

[0007] When the user uses the food processor to process food, the temperature of the area with higher speed in the process of rotation of the gear set rises significantly, which will form a high-pressure area with higher pressure, that is, a high-pressure area is formed near the first gear set, and a low-pressure area is formed near the second gear set. Under the action of the pressure difference, the lubricating oil in the installation cavity will flow from the high-pressure area to the low-pressure area. By providing a first oil storage tank on the side of the installation cavity and close to the second gear set, the lubricating oil near the first gear set can be stored through the first oil storage tank when flowing to the vicinity of the second gear set, effectively avoiding the lubricating oil splashing around in the installation cavity, resulting in poor lubrication effect and loud noise. At the same time, a second oil storage tank is provided above the first oil storage tank on the outside of the shell, and the first oil storage tank and the second oil storage tank are connected through a pressure relief hole, so that when too much lubricating oil accumulates in the first oil storage tank, the overflowed lubricating oil can be The oil in the second oil tank flows back through the pressure relief hole to the first oil tank, and the oil in the first oil tank flows back downwards under the action of gravity to lubricate the first gear set and the second gear set, thereby maintaining the amount of lubricating oil used in the various components of the reduction gear set, reducing noise deterioration, ensuring lubrication effects, and avoiding serious wear of various components, thereby making the reduction motor more reliable and rotating more stably.

[0008] In a preferred implementation of the rotationally stable food processor, a projection of at least a portion of the second oil storage tank on a horizontal plane coincides with the pressure relief hole.

[0009] By arranging the projection of at least part of the second oil storage tank on the horizontal plane and the pressure relief hole to coincide with each other, the lubricating oil in the second oil storage tank can better flow downward through the pressure relief hole under the action of gravity, thereby improving the reflux efficiency of the lubricating oil and at the same time enabling the lubricating oil in the second oil storage tank to be drained as much as possible, effectively avoiding the situation where a large amount of lubricating oil still remains in the second oil storage tank and cannot flow back, resulting in a deterioration in the lubrication effect of various components in the reduction gearbox, causing a louder rotation noise and severe wear.

[0010] In a preferred implementation of the rotationally stable food processor, the second oil storage tank is formed on the top wall of the housing.

[0011] By forming the second oil reservoir into the housing's top wall, the lubricating oil in the second reservoir can flow downward through the pressure relief hole under the action of gravity, improving the lubricating oil's return efficiency. This also rationally utilizes the reduction gearbox's structural space, reducing its radial footprint, contributing to a more compact structure within the main engine and reducing the overall machine's footprint.

[0012] In a preferred implementation of a rotationally stable food processor, a fixing hole fixedly connected to the motor is provided on the bottom wall of the housing, and the cross-sectional area of ​​the fixing hole is smaller than the cross-sectional area of ​​the pressure relief hole.

[0013] By setting the cross-sectional area of ​​the fixed hole to be smaller than the cross-sectional area of ​​the pressure relief hole, when the reducer is working, the high-pressure area and the low-pressure area in the reducer will cause the lubricating oil and gas to flow from the high-pressure area to the low-pressure area under the action of the pressure difference. Due to the characteristics of the lubricating oil and the gas themselves, the lubricating oil and the gas in the reducer will preferentially choose the channel with a large hole cross-sectional area to flow out. The cross-sectional area of ​​the fixed hole is smaller than the cross-sectional area of ​​the pressure relief hole, and the screws at the fixing hole also have a certain obstructive effect on the lubricating oil and gas. Only a small amount of airflow will penetrate out, effectively preventing the lubricating oil and the like from overflowing through the fixed hole.

[0014] In a preferred implementation of a food processor with stable rotation, the second gear set includes a gear and a planetary bracket arranged above the gear, and the top wall of the planetary bracket and the inner wall of the installation cavity are combined to form a first oil storage tank.

[0015] By configuring the second gear set to include gears and a planetary carrier positioned above the gears, the lubricating oil that splashes upward after passing through the gears is prevented from further splashing upward by the planetary carrier. The blocked lubricating oil can then flow back onto the gears, further lubricating the second gear set. Simultaneously, the first oil reservoir is formed by the top wall of the planetary carrier and the inner wall of the mounting cavity. This allows the planetary carrier to block the lubricating oil while also forming the first oil reservoir. This eliminates the need for an additional structure within the mounting cavity to form the first oil reservoir, simplifying the structure of the reduction gearbox and improving its compactness.

[0016] In a preferred implementation of a rotationally stable food processor, an inner gear ring is provided on the cavity wall of the mounting cavity above the planetary bracket, and a distance L between the planetary bracket and the tooth top of the inner gear ring satisfies: 0.75 mm ≤ L ≤ 1 mm.

[0017] By providing an inner gear ring in the cavity wall of the mounting cavity above the planetary bracket, the overall strength of the housing can be improved, preventing deformation of the housing when subjected to high pressure. At the same time, the distance L between the planetary bracket and the inner gear ring tooth top satisfies the following conditions: 0.75mm≤L≤1mm. On the one hand, this allows the lubricating oil near the second gear set to flow smoothly to the first oil reservoir through the gap between the planetary bracket and the inner gear ring tooth top, ensuring smooth flow of the lubricating oil and avoiding the situation where L is less than 0.75mm, resulting in poor flow of the lubricating oil into the first oil reservoir. On the other hand, it greatly expands the oil storage space of the first oil reservoir, allowing more lubricating oil to be stored in the first oil reservoir, avoiding the situation where L is greater than 1mm, resulting in a small oil storage space in the first oil reservoir and excessive lubricating oil overflow.

[0018] In a preferred implementation of a rotationally stable food processor, the main unit includes a main unit housing, the motor and the reduction gearbox are arranged in the main unit housing, the shell is fixed to the main unit housing, and the main unit housing is provided with a baffle that blocks the slot of the second oil storage tank.

[0019] By providing a baffle on the main engine housing to cover the slot of the second oil storage tank, on the one hand, it can prevent the lubricating oil in the second oil storage tank from splashing outward and causing pollution to external components, thereby further achieving the protection effect of various components in the main engine; on the other hand, it can achieve the dust-proof protection effect of the second oil storage tank, preventing dust and the like from entering the second oil storage tank and causing pollution of the lubricating oil and deterioration of its lubrication effect, thereby ensuring the lubricating effect of the lubricating oil.

[0020] In a preferred implementation of a rotationally stable food processor, a reflux structure is provided between the first oil storage tank and the second oil storage tank, so that the oil in the second oil storage tank flows back into the first oil storage tank through the pressure relief hole.

[0021] By providing a reflux structure between the first oil storage tank and the second oil storage tank, the lubricating oil in the first oil storage tank can flow back into the first oil storage tank through the pressure relief hole due to the guiding effect of the reflux structure, thereby improving the reflux efficiency of the lubricating oil and at the same time enabling the lubricating oil in the second oil storage tank to be drained as much as possible, effectively avoiding the situation where a large amount of lubricating oil still remains in the second oil storage tank and cannot flow back, resulting in poor lubrication effect of various components in the reduction gearbox, causing increased rotation noise and severe wear.

[0022] In a preferred implementation of a rotationally stable food processor, the reflux structure includes a reflux surface arranged on the bottom wall of the second oil storage tank and extending obliquely downward, and the pressure relief hole is arranged at the lowest position of the reflux surface.

[0023] By arranging the pressure relief hole at the lowest position of the return surface, the lubricating oil in the second oil storage tank can flow back into the installation cavity as much as possible, further improving the return effect of the lubricating oil and ensuring its lubrication effect on various components in the reduction gearbox. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is a schematic structural diagram of a host in one embodiment of the present invention;

[0026] Figure 2 This is an exploded view of a reduction gearbox and a motor in one embodiment of the present invention;

[0027] Figure 3 This is a cross-sectional view of a reduction gearbox in one embodiment of the present invention;

[0028] Figure 4 This is a structural diagram of a housing in one embodiment of the present invention;

[0029] Figure 5 This is a schematic structural diagram of the housing at another angle in one embodiment of the present invention.

[0030] List of parts and reference numerals:

[0031] 1-main engine, 11-main engine housing, 111-baffle; 2-motor; 3-reduction gearbox, 31-first gear set, 32-second gear set, 33-housing, 331-pressure relief hole, 332-annular enclosure, 333-fixing part, 34-planetary bracket, 35-installation cavity, 351-inner ring gear, 36-first oil storage tank, 37-second oil storage tank. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0033] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific implementation methods disclosed below.

[0034] like Figures 1 to 5As shown, the utility model provides a food processing machine with stable rotation, including a main body 1 and a detachable processing assembly arranged above the main body 1, a motor 2 and a reduction gear box 3 that is transmission-connected between the motor 2 and the processing assembly are arranged in the main body 1, the reduction gear box 3 includes a housing 33 with a mounting cavity 35 and a gear set arranged in the mounting cavity 35, the gear set includes a first gear set 31 that is transmission-connected to the motor 2 shaft of the motor 2 and a second gear set 32 ​​that is transmission-connected to the output shaft of the first gear set 31, wherein the first gear set 31 is Both the first and second gear sets 32 can have multiple gear stages. A first oil storage tank 36 is provided in the mounting cavity 35 and on the side close to the second gear set 32. A second oil storage tank 37 is provided on the outside of the shell 33 and is located above the first oil storage tank 36. The first oil storage tank 36 and the second oil storage tank 37 are connected through the pressure relief hole 331. It should be noted that the above-mentioned first oil storage tank 36 can be directly above or obliquely above. For example, when the pressure relief hole 331 is provided on the side of the shell 33, the second oil storage tank 37 is located obliquely above the first oil storage tank 36.

[0035] The present application provides a motor 2 and a reduction gear box 3 in a main unit 1, which is connected to the motor 2 and the processing assembly. The torque output by the motor 2 is decelerated by the reduction gear box 3 before being output to the processing assembly, allowing the processing assembly to output a greater torque to meet user needs. At the same time, the gear set includes a first gear set 31 connected to the motor shaft of the motor 2 and a second gear set 32 ​​connected to the output shaft of the first gear set 31. The torque output by the motor 2 is reduced in one stage by the first gear set 31 and then reduced in two stages by the second gear set 32, achieving multi-stage torque reduction. This allows the processing assembly to output a greater torque for processing difficult-to-process ingredients.

[0036] When the user uses the food processor to process food, the temperature of the area with higher speed in the process of rotation of the gear set rises significantly, which will form a high-pressure area with higher pressure, that is, a high-pressure area is formed near the first gear set 31, and a low-pressure area is formed near the second gear set 32. Under the action of the pressure difference, the lubricating oil in the installation cavity 35 will flow from the high-pressure area to the low-pressure area. By providing a first oil storage tank 36 on the side of the installation cavity 35 close to the second gear set 32, the lubricating oil near the first gear set 31 can be stored in the first oil storage tank 36 when flowing to the second gear set 32, effectively avoiding the lubricating oil splashing around in the installation cavity 35, resulting in poor lubrication effect and loud noise. At the same time, a second oil storage tank 37 is provided on the outside of the shell 33, which is located above the first oil storage tank 36, and the first oil storage tank 36 and the second oil storage tank 37 are connected through the pressure relief hole 331, so that when too much lubricating oil accumulates in the first oil storage tank 36, the overflowed lubricating oil can be discharged. The oil in the second oil tank 37 overflows outwards through the pressure relief hole 331 into the second oil storage tank 37 and is stored in the second oil storage tank 37. Compared with the existing method of only providing the pressure relief hole 331, the lubricating oil is effectively prevented from splashing directly to the outside after being discharged from the pressure relief hole 331, causing other components in the main unit 1 to be contaminated or even unable to be used normally, thereby ensuring the stability of the operation of the entire machine. In addition, the second oil storage tank 37 is located above the first oil storage tank 36, so that after the user uses the external food processor and the reduction gear box 3 cools down, the lubricating oil in the second oil storage tank 37 flows back into the first oil storage tank 36 through the pressure relief hole 331 under the action of gravity, and the lubricating oil in the first oil storage tank 36 also flows downward under the action of gravity and realizes the lubrication of the first gear set 31 and the second gear set 32, thereby maintaining the lubricating oil consumption of each component in the reduction gear box 3, reducing the deterioration of noise, ensuring the lubrication effect and avoiding serious wear of each component, making the reduction motor 2 more reliable and rotating more stably.

[0037] It should be noted that the present application does not specifically limit the relative position relationship between the second oil storage tank 37 and the pressure relief hole 331. As a preferred embodiment of the present application, Figure 3 As shown, at least a portion of the projection of the second oil storage tank 37 on the horizontal plane coincides with the pressure relief hole 331 .

[0038] By arranging the projection of at least part of the second oil storage tank 37 on the horizontal plane to coincide with the pressure relief hole 331, the lubricating oil in the second oil storage tank 37 can better flow downward through the pressure relief hole 331 under the action of gravity, thereby improving the reflux efficiency of the lubricating oil. At the same time, the lubricating oil in the second oil storage tank 37 can be emptied as much as possible, effectively avoiding the situation where a large amount of lubricating oil still remains in the second oil storage tank 37 and cannot flow back, resulting in a deterioration in the lubrication effect of various components in the reduction box 3, causing a louder rotation noise and severe wear.

[0039] It should be noted that the present application does not specifically limit the forming position of the second oil storage tank 37. As a preferred embodiment of the present application, Figure 3 、 Figure 4 As shown, the second oil storage tank 37 is formed on the top wall of the shell 33.

[0040] By forming the second oil reservoir 37 on the top wall of the housing 33, the lubricating oil in the second oil reservoir 37 can flow downward through the pressure relief hole 331 under the action of gravity, thereby improving the return efficiency of the lubricating oil. At the same time, the structural space of the reduction gearbox 3 is rationally utilized, and the radial space occupied by the reduction gearbox 3 can be reduced, which helps to improve the compactness of the structure of the main engine 1 and reduce the space occupied by the entire machine.

[0041] Furthermore, if Figure 4 As shown, the upper end surface of the shell 33 is provided with an outwardly extending annular enclosure 332, and the annular enclosure 332 encloses a second oil storage tank 37. Specifically, the main unit 1 includes an outer shell that accommodates the motor 2 and the reduction gearbox 3. The top wall of the shell 33 is provided with a fixing portion 333 fixedly connected to the outer shell, and the annular enclosure 332 is formed between the fixing portions 333.

[0042] In the above embodiment, the present application does not limit the placement direction of the reduction gearbox 3, which can be placed horizontally or horizontally. Figure 1 As shown in the vertical arrangement, preferably, the reduction gearbox 3 is vertically arranged in the main engine 1. Of course, when the reduction gearbox 3 is vertically arranged in the main engine 1, the second oil storage tank 37 is not limited to being arranged on the top wall of the shell 33, but can also be arranged on the side wall of the shell 33 and located laterally above the first oil storage tank 36.

[0043] As a preferred embodiment of the present application, a fixing hole fixedly connected to the motor 2 is provided on the bottom wall of the housing 33 , and the cross-sectional area of ​​the fixing hole is smaller than the cross-sectional area of ​​the pressure relief hole 331 .

[0044] By setting the cross-sectional area of ​​the fixing hole to be smaller than the cross-sectional area of ​​the pressure relief hole 331, when the reducer 3 is working, the high-pressure area and the low-pressure area in the reducer 3 will cause the lubricating oil and gas to flow from the high-pressure area to the low-pressure area under the action of the pressure difference. Due to the characteristics of the lubricating oil and the gas themselves, the lubricating oil and the gas in the reducer 3 will preferentially choose the channel with a large hole cross-sectional area to flow out. The cross-sectional area of ​​the fixing hole is smaller than the cross-sectional area of ​​the pressure relief hole 331 and the screws at the fixing hole also have a certain obstructive effect on the lubricating oil and the gas. Only a small amount of airflow will penetrate out of it, effectively preventing the lubricating oil and the like from overflowing through the fixing hole.

[0045] It should be noted that the present application does not specifically limit the forming method of the first oil storage tank 36. As a preferred embodiment of the present application, Figure 3As shown, a planetary bracket 34 is further provided in the installation cavity 35 and is located above the second gear set 32 ​​. The top wall of the planetary bracket 34 and the inner wall of the installation cavity 35 are combined to form a first oil storage tank 36 .

[0046] By also providing a planetary carrier 34 above the second gear set 32 ​​within the mounting cavity 35, the lubricating oil that splashes upward after passing through the second gear set 32 ​​is prevented from further splashing upward by the planetary carrier 34. At the same time, the blocked lubricating oil can flow back to the second gear set 32, further lubricating the second gear set 32. Furthermore, the first oil reservoir 36 is formed by the top wall of the planetary carrier 34 and the inner wall of the mounting cavity 35. This allows the planetary carrier 34 to block the lubricating oil while also forming the first oil reservoir 36. This eliminates the need for an additional structure within the mounting cavity 35 to form the first oil reservoir 36, simplifying the structure of the reduction gearbox 3 and improving its compactness.

[0047] Furthermore, if Figure 3 As shown, the cavity wall of the mounting cavity 35 above the planetary bracket 34 is provided with an inner gear ring 351 , and the distance L between the planetary bracket 34 and the tooth top of the inner gear ring 351 satisfies: 0.75 mm≤L≤1 mm.

[0048] By providing the cavity wall of the mounting cavity 35 above the planetary carrier 34 with an inner gear ring 351, the overall strength of the housing 33 can be improved, preventing deformation of the housing 33 when subjected to high pressure. At the same time, the distance L between the planetary carrier 34 and the tooth tops of the inner gear ring 351 satisfies the following: 0.75mm≤L≤1mm. This allows lubricating oil near the second gear set 32 ​​to flow smoothly into the first oil reservoir 36 through the gap between the planetary carrier 34 and the tooth tops of the inner gear ring 351, ensuring smooth flow of lubricating oil and avoiding the situation where L is less than 0.75mm, resulting in unsmooth flow of lubricating oil into the first oil reservoir 36. Furthermore, it greatly expands the oil storage space of the first oil reservoir 36, allowing more lubricating oil to be stored in the first oil reservoir 36, and avoiding the situation where L is greater than 1mm, resulting in a smaller oil storage space in the first oil reservoir 36 and excessive lubricating oil overflow.

[0049] As a preferred embodiment of the present application, Figure 1 As shown, the main engine 1 includes a main engine housing 11, the motor 2 and the reduction gearbox 3 are arranged in the main engine housing 11, the shell 33 is fixed to the main engine housing 11, and the main engine housing 11 is provided with a baffle 111 covering the notch of the second oil storage tank 37.

[0050] By providing a baffle 111 on the main body housing 11 to cover the notch of the second oil storage tank 37, on the one hand, it can prevent the lubricating oil in the second oil storage tank 37 from splashing outward and causing pollution to external parts, thereby further achieving the protection effect of various components in the main body 1; on the other hand, it can achieve the dust-proof protection effect of the second oil storage tank 37, preventing dust and the like from entering the second oil storage tank 37 and causing pollution of the lubricating oil and deterioration of its lubrication effect, thereby ensuring the lubricating effect of the lubricating oil.

[0051] As a preferred embodiment of the present application, a reflux structure is provided between the first oil storage tank 36 and the second oil storage tank 37 so that the oil in the second oil storage tank 37 can flow back into the first oil storage tank 36 through the pressure relief hole 331 .

[0052] By providing a reflux structure between the first oil storage tank 36 and the second oil storage tank 37, the lubricating oil in the first oil storage tank 36 can flow back into the first oil storage tank 36 through the pressure relief hole 331 due to the guiding effect of the reflux structure, thereby improving the reflux efficiency of the lubricating oil. At the same time, the lubricating oil in the second oil storage tank 37 can be emptied as much as possible, effectively avoiding the situation where a large amount of lubricating oil still remains in the second oil storage tank 37 and cannot flow back, resulting in poor lubrication effect of various components in the reduction gear box 3, causing increased rotation noise and severe wear.

[0053] Furthermore, the reflux structure includes a reflux surface that is arranged on the bottom wall of the second oil storage tank 37 and extends obliquely downward, and the pressure relief hole 331 is arranged at the lowest position of the reflux surface.

[0054] By arranging the pressure relief hole 331 at the lowest position of the return surface, the lubricating oil in the second oil reservoir 37 can flow back into the mounting cavity 35 as much as possible, further improving the return effect of the lubricating oil and ensuring its lubrication effect on the various components in the reduction gearbox 3. Of course, the return structure is not limited to the above-mentioned arrangement, and it can also be a return channel extending obliquely downward, which will not be described in detail here.

[0055] The technical solutions protected by this utility model are not limited to the above-described embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of this utility model. Although the above description of this utility model has been provided in detail using general instructions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on this utility model. Therefore, such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A food processing machine with stable rotation, comprising a main machine and a detachable processing assembly disposed above the main machine, wherein the main machine is provided with a motor and a reduction gearbox connected between the motor and the processing assembly, characterized in that: The reduction gearbox includes a shell having an installation cavity and a gear set arranged in the installation cavity, the gear set includes a first gear set that is transmission-connected to the motor shaft of the motor and a second gear set that is transmission-connected to the output shaft of the first gear set, a first oil storage tank is provided in the installation cavity and on one side close to the second gear set, a second oil storage tank is provided above the first oil storage tank on the outside of the shell, and the first oil storage tank and the second oil storage tank are connected through a pressure relief hole.

2. A rotationally stable food processing machine according to claim 1, characterized in that: A projection of at least part of the second oil storage tank on a horizontal plane coincides with the pressure relief hole.

3. A rotationally stable food processing machine according to claim 1, characterized in that: The second oil storage tank is formed on the top wall of the shell.

4. A rotationally stable food processing machine according to claim 3, characterized in that: An outwardly extending annular enclosure is provided on the upper end surface of the shell, and the annular enclosure forms the second oil storage tank.

5. The rotationally stable food processing machine according to claim 1, characterized in that: The bottom wall of the housing is provided with a fixing hole fixedly connected to the motor, and the cross-sectional area of ​​the fixing hole is smaller than the cross-sectional area of ​​the pressure relief hole.

6. A rotationally stable food processing machine according to claim 1, characterized in that: The second gear set includes a gear and a planetary bracket arranged above the gear, and the top wall of the planetary bracket and the inner wall of the installation cavity are combined to form the first oil storage tank.

7. A rotationally stable food processing machine according to claim 6, characterized in that: An inner gear ring is provided on the cavity wall of the mounting cavity above the planetary bracket, and a distance L between the planetary bracket and the tooth top of the inner gear ring satisfies the following: 0.75 mm ≤ L ≤ 1 mm.

8. The rotationally stable food processing machine according to claim 1, characterized in that: The main engine includes a main engine housing, the motor and the reduction gearbox are arranged in the main engine housing, the shell is fixed to the main engine housing, and the main engine housing is provided with a baffle covering the notch of the second oil storage tank.

9. The rotationally stable food processing machine according to claim 1, characterized in that: A reflux structure is provided between the first oil storage tank and the second oil storage tank, so that the oil in the second oil storage tank flows back into the first oil storage tank through the pressure relief hole.

10. A rotationally stable food processor according to claim 9, characterized in that: The reflux structure includes a reflux surface arranged on the bottom wall of the second oil storage tank and extending obliquely downward, and the pressure relief hole is arranged at the lowest position of the reflux surface.

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