A food processor

Abstract

The utility model discloses a food processing machine, including the cup body of built -in stirring member and with processing cavity and the host computer that is equipped with motor, and the speed reduction mechanism includes with motor fixed connection and is the first support of metal material and is fixedly connected with the second support below the first support, is equipped with worm wheel and with worm wheel transmission connection and the output shaft that stretches out from the first support between the first support and the second support, and the output end of motor has the transmission connection of worm and worm wheel, and the first support is equipped with the hole of avoiding that output shaft passes out, and the first insulating bushing that is equipped with the hole of avoiding and output shaft between separates the both, and the top surface of first insulating bushing and the top surface of hole of avoiding have height difference, to form zigzag creeping path between the hole of avoiding and output shaft through the height of lateral wall of first insulating bushing and the width of top wall, thereby effectively prolongs the creeping distance under the premise of not increasing the thickness of insulating bushing, guarantees the insulation performance, and then reduces the radial dimension demand of insulating bushing.

Description

Technical Field

[0001] This utility model relates to the field of household appliances technology, specifically to a food processing machine. Background Technology

[0002] Existing food processing machines, such as dough mixers, typically include a cup body with a built-in mixing element and a processing chamber, and a main unit containing a motor. The motor is connected to the mixing element via a reduction gear mechanism. When using the food processing machine, the user places the ingredients into the processing chamber. The motor rotates, and after being reduced in speed by the reduction gear mechanism, the torque is transmitted to the mixing element, which then rotates to process the ingredients. The reduction gear mechanism usually includes a first bracket fixedly connected to the motor and a second bracket fixedly connected below the first bracket. A worm gear is located between the first and second brackets, and an output shaft, connected to the worm gear and extending from the first bracket, is driven by it. A metal connector is located inside the cup body; one end of the connector is connected to the mixing element, and the other end extends to the outer bottom surface of the cup body and is connected to the output shaft. Because the entire reduction structure needs to withstand a significant force when the motor transmits torque to the worm gear, the first bracket is usually made of metal to ensure the stability of the connection between the reduction gear mechanism and the motor. However, during operation, if leakage occurs due to the motor being powered on, it will be transmitted through the first metal bracket to the output shaft, then from the output shaft to the connector, and finally from the connector to the mixing component, causing the entire machine to become electrified, which could be dangerous if the user touches it.

[0003] To address this issue, Chinese patent CN217481911U discloses a geared motor with a double-insulated structure for dough mixers. This motor has insulating bushings between the contact points of the gear reducer and the output shaft. These bushings insulate the gear reducer from the output shaft, preventing current from being transferred from the gear reducer to the output shaft. To meet these insulation requirements, the creepage distance from the top wall of the gear reducer to the output shaft must be greater than 8mm. However, since the top wall of the gear reducer is flush with the insulating bushing, the creepage distance is equal to the width of the top wall of the insulating bushing. Therefore, the thickness of the insulating bushing should be no less than 8mm. This results in an excessively large radial dimension of the entire gear reducer mechanism, leading to an overly large radial dimension of the entire machine. This makes it impossible to meet the requirements for miniaturization, resulting in a large footprint and significantly impacting the user experience. Utility Model Content

[0004] The purpose of this utility model is to provide a food processing machine to solve the problem in existing food processing machines where, under the premise of setting an insulating bushing between the speed reducer and the output shaft and meeting the creepage distance, the radial dimension of the entire speed reducer mechanism is too large due to the excessive thickness of the insulating bushing.

[0005] To achieve the above objectives, this utility model provides a food processing machine, including a cup body with a built-in stirring element and a processing chamber, and a main unit with a motor inside. The motor is driven and connected to the stirring element through a reduction mechanism. The reduction mechanism includes a first bracket made of metal and fixedly connected to the motor, and a second bracket fixedly connected below the first bracket. A worm gear is provided between the first bracket and the second bracket, and an output shaft extending from the first bracket is driven and connected to the worm gear. The output end of the motor has a worm and is driven and connected to the worm gear. A metal transmission part is provided inside the cup body. One end of the transmission part is connected to the stirring element, and the other end extends to the outer bottom surface of the cup body and is connected to the output shaft. The first bracket is provided with a clearance hole for the output shaft to pass through. A first insulating bushing is provided between the clearance hole and the output shaft to isolate the two. There is a height difference between the top surface of the first insulating bushing and the top surface of the clearance hole, so that a tortuous creepage path is formed between the clearance hole and the output shaft through the side wall height and top wall width of the first insulating bushing.

[0006] This application provides a first insulating bushing that isolates the output shaft from the clearance hole. The top surface of the first insulating bushing has a height difference with the top surface of the clearance hole. This height difference results in a creepage path between the first bracket and the output shaft that is no longer simply the width of the bushing's top wall. Instead, it becomes a tortuous path formed by the combined height of the side walls and the width of the top wall of the first insulating bushing, thus meeting insulation requirements. For example, when the top surface of the first insulating bushing is higher than the top surface of the clearance hole, the creepage path will first extend upwards along the outer peripheral wall of the first insulating bushing, and then inwards along the top wall before contacting the output shaft, significantly increasing the creepage path. The total length; for example, when the top surface of the first insulating bushing is lower than the top surface of the clearance hole, the creepage path will first extend inward along the top surface of the first insulating bushing, and the top surface of the first insulating bushing is preferably stepped, thereby greatly extending the creepage path. This achieves the goal of effectively extending the creepage distance without increasing the thickness and height of the first insulating bushing, ensuring insulation performance, and reducing the radial dimension requirement of the insulating bushing. Furthermore, the height of the first insulating bushing is less than the height of the output shaft. Therefore, under the premise of reducing the radial dimension of the first insulating bushing, the overall height of the reduction mechanism will not be changed, which helps to reduce the overall volume of the reduction mechanism, improve the space utilization of the whole machine, and improve the user experience.

[0007] In a preferred embodiment of a food processing machine, the reduction mechanism further includes a bearing sleeved on the outside of the output shaft, a first insulating bushing is isolated between the bearing and the clearance hole and partially shields the top of the bearing, and the radial distance between the first insulating bushing and the bearing is less than the minimum radial distance between the first insulating bushing and the output shaft.

[0008] By including a bearing sleeved on the outside of the output shaft in the reduction mechanism, the output shaft can be isolated from the first bracket through the bearing, ensuring smooth rotation of the output shaft. Simultaneously, the first insulating sleeve isolates the bearing from the clearance hole, and the radial distance between the first insulating sleeve and the bearing is less than the minimum radial distance between the first insulating sleeve and the output shaft, creating a gap between the first insulating sleeve and the output shaft. This effectively prevents wear or friction on the first insulating sleeve during output shaft rotation, thereby extending the service life of the first insulating sleeve and ensuring its long-term stable isolation function. Furthermore, the first insulating sleeve partially covers the bearing, axially limiting the bearing's position and ensuring bearing stability, thus improving the operational stability of the reduction mechanism.

[0009] In a preferred embodiment of a food processing machine, the first insulating bushing includes a clamping section clamped between a clearance hole and a bearing, and a first insulating section extending inward from the top of the clamping section and abutting against the top wall of the bearing. The first insulating bushing is shielded above the bearing by the first insulating section.

[0010] By configuring the first insulating bushing to include a clamping section that holds between the clearance hole and the bearing, and a first insulating section that extends inward from the top of the clamping section and abuts against the top wall of the bearing, the clamping section effectively isolates the clearance hole and the bearing. It also provides buffering and shock absorption, reducing the direct transmission of vibrations generated during high-speed rotation to the first support via the bearing. This effectively reduces overall vibration transmission and improves the stability of the machine. Furthermore, the first insulating section abutting against the top wall of the bearing significantly extends the creepage path from the clearance hole to the bearing, preventing current from being transmitted to the bearing and then from the bearing to the output shaft, further enhancing the insulation performance and safety of the reduction mechanism. Simultaneously, the clamping section and the first insulating section covering the bearing achieve dual vertical and horizontal isolation between the first support and the bearing, ensuring that current cannot be transmitted to the bearing.

[0011] In a preferred embodiment of a food processing machine, an inwardly extending ring rib is provided at the outer port of the clearance hole, and the ring rib is pressed against the top of the first insulating section.

[0012] By providing an inwardly extending ring rib at the outer port of the clearance hole, and pressing the ring rib above the first insulating section, the entire first bracket can achieve axial positioning through the cooperation of the ring rib and the first insulating section, ensuring the positional stability of the upper bracket. At the same time, it can achieve axial positioning of the first insulating bushing, ensuring the stability of the first insulating bushing in the axial direction, and avoiding axial displacement of the first insulating bushing due to vibration or uneven force during high-speed operation, which would affect the insulation effect or damage the structural components.

[0013] In a preferred embodiment of a food processing machine, the first insulating bushing includes a second insulating section extending radially outward between the bottom wall of the first support and the top wall of the worm gear.

[0014] The first insulating bushing includes a second insulating section extending radially outward between the bottom wall of the first support and the top wall of the worm gear. This ensures that the creepage distance between the first support and the bearing is first downward along the outer wall of the second insulating section, then inward along the bottom wall of the second insulating section, and then upward along the inner wall of the second insulating section. The creepage distance between the first support and the worm gear is downward along the outer wall of the second insulating section. This allows the second insulating section to extend the creepage distance between the first support and the worm gear and the bearing, ensuring that the creepage path between the first support and the bearing and the worm gear is tortuous, whether conducting electricity from the bottom or the top of the first support. This effectively prevents current from being transmitted to the worm gear or the bearing through short circuits or leakage, further improving the insulation safety and stability of the entire reduction mechanism and ensuring that the equipment maintains reliable insulation performance during long-term operation.

[0015] In a preferred embodiment of a food processing machine, an insulating gap is provided between the second insulating section and the bottom wall of the first support or the top wall of the worm gear.

[0016] By providing an insulation gap between the second insulation section and the bottom wall of the first support or the top wall of the worm gear, on the one hand, the creepage path transmitted to the output shaft through the second insulation section and bearing can be increased, further improving the insulation performance of the output shaft; on the other hand, the distance between the first support and the worm gear can be further increased, thereby effectively improving the insulation performance and further preventing the current from being directly transmitted to the worm gear.

[0017] In a preferred embodiment of a food processing machine, the second support is made of plastic; or, The second bracket is made of metal, and a second insulating bushing is provided between the second bracket and the output shaft to isolate the two.

[0018] By making the second bracket out of plastic, the risk of electrical leakage due to the conductivity of metal is eliminated, further improving the overall insulation safety of the deceleration mechanism. This also reduces the overall weight of the machine, making it easier for users to handle and load the food processor.

[0019] By setting the second bracket to a metal material and providing a second insulating bushing between the second bracket and the output shaft to isolate the two, insulation isolation between the second bracket and the output shaft is achieved. This ensures that if current is conducted to the second bracket through other paths, it can also be effectively blocked by the second insulating bushing, preventing the metal second bracket from becoming a conductive path, thereby further ensuring the safety of the equipment.

[0020] In addition, both of the above-mentioned second bracket schemes can eliminate the need for grounding wiring harnesses, thereby saving production costs and improving production efficiency.

[0021] In a preferred embodiment of a food processing machine, the inner peripheral wall of the first insulating bushing is further provided with an inwardly extending annular insulating rib.

[0022] By providing an inwardly extending annular insulating rib on the inner circumferential wall of the first insulating bushing, the creepage path of the first insulating bushing can be further extended through the annular insulating rib. This adds a path formed by the inner circumferential wall of the first insulating bushing and the top wall of the annular insulating rib to the original creepage path, thereby further improving the insulation performance of the first insulating bushing. Simultaneously, only the annular insulating rib area can be thickened, while the entire first insulating bushing can be made thinner. This not only reduces the amount of material used for demolding the first insulating bushing, thus lowering production costs, but also provides a larger heat dissipation gap for the output shaft, facilitating heat dissipation.

[0023] In a preferred embodiment of a food processing machine, the top surface of the first insulating bushing is higher than the top surface of the clearance hole, and an insulating groove with an upper opening is provided between the first insulating bushing and the clearance hole and between the first insulating bushing and the output shaft. The creepage path is formed on the groove wall of the insulating groove and the top surface of the first insulating bushing.

[0024] By making the top surface of the first insulating bushing higher than the top surface of the clearance hole, and by providing insulating grooves with upper openings between the first insulating bushing and the clearance hole, as well as between the first insulating bushing and the output shaft, the creepage path is further extended. First, it extends inward along the bottom wall of the insulating groove near the clearance hole, then upward from the outer peripheral wall of the first insulating bushing, then inward from the top wall of the first insulating bushing, then downward from the inner peripheral wall of the first insulating bushing, and finally inward from the bottom wall of the insulating groove near the output shaft to reach the surface of the output shaft. This further greatly extends the creepage distance, allowing the first insulating bushing to be made thinner, and thus making the structure of the entire reduction mechanism more compact.

[0025] This application also protects a food processing machine, including a cup body with a built-in stirring element and a processing chamber, and a main unit with a motor inside. The motor is connected to the stirring element via a reduction mechanism. The reduction mechanism includes a first bracket made of metal and fixedly connected to the motor, and a second bracket fixedly connected below the first bracket. A worm gear and an output shaft extending from the first bracket are provided between the first bracket and the second bracket. A metal transmission part is provided inside the cup body. One end of the transmission part is connected to the stirring element, and the other end is located on the outer bottom surface of the cup body and connected to the output shaft. The output end of the motor has a worm gear and is connected to the worm gear. The first bracket has a clearance hole for the output shaft to pass through. A first insulating bushing is provided between the clearance hole and the output shaft to isolate the two. An insulating groove is provided between the first insulating bushing and the clearance hole or the output shaft to form a tortuous creepage path between the clearance hole and the output shaft through the first insulating bushing and the insulating groove.

[0026] By providing an insulating groove between the first insulating bushing and the clearance hole or output shaft, the creepage path between the first bracket and the output shaft is no longer a single width of the bushing top wall, but a more complex creepage path formed by the groove wall of the insulating groove and the top surface of the first insulating bushing. This significantly extends the creepage distance without increasing the bushing thickness, further improving the insulation performance. This allows the first insulating bushing to be made thinner, thereby effectively reducing the overall volume of the deceleration mechanism, improving the internal space utilization of the food processing machine, and further optimizing the structural stability and operational reliability of the whole machine. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a cross-sectional view of a food processing machine according to one embodiment of the present invention; Figure 2 This is a cross-sectional view of the deceleration mechanism in one embodiment of the present invention; Figure 3 This is an exploded view of the deceleration mechanism and the motor in one embodiment of the present invention; Figure 4 This is a cross-sectional view of the deceleration mechanism in another embodiment of the present invention; Figure 5 This is an exploded view of the deceleration mechanism and the motor in another embodiment of the present invention.

[0028] List of components and reference numerals: 1-Cup body; 2-Main unit; 3-First bracket; 31-Allowing hole; 32-Ring rib; 4-Output shaft; 5-Second bracket; 6-First insulating bushing; 61-Clamping section; 62-First insulating section; 63-Second insulating section; 64-Ring insulating rib; 7-Insulation gap; 8-Worm gear; 9-Bearing; 10-Insulation groove; 11-Motor; 12-Second insulating bushing. Detailed Implementation

[0029] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0030] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may 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 embodiments disclosed below.

[0031] like Figures 1 to 5 As shown, this utility model provides a food processing machine, including a cup body 1 with a built-in stirring component and a processing chamber, and a main unit 2 with a motor 11 inside. The motor 11 is connected to the stirring component through a reduction mechanism. The reduction mechanism includes a first bracket 3 made of metal and fixedly connected to the motor 11, and a second bracket 5 fixedly connected below the first bracket 3. A worm gear 8 is provided between the first bracket 3 and the second bracket 5, and an output shaft 4 extending from the first bracket 3 and connected to the worm gear 8. The output end of the motor 11 has a worm and is connected to the worm gear 8. A metal transmission part is provided inside the cup body 1. One end of the transmission part is connected to the stirring component, and the other end extends to the outer bottom surface of the cup body 1 and is connected to the output shaft 4. The first bracket 3 is provided with a clearance hole 31 for the output shaft 4 to pass through. A first insulating bushing 6 is provided between the clearance hole 31 and the output shaft 4 to isolate the two. There is a height difference between the top surface of the first insulating bushing 6 and the top surface of the clearance hole 31, so that a tortuous creepage path is formed between the clearance hole 31 and the output shaft 4 through the side wall height and top wall width of the first insulating bushing 6.

[0032] This application provides a first insulating bushing 6 between the clearance hole 31 and the output shaft 4 to isolate them. The top surface of the first insulating bushing 6 has a height difference with the top surface of the clearance hole 31. This height difference prevents the creepage path between the first bracket 3 and the output shaft 4 from being a single width of the bushing's top wall. Instead, it creates a tortuous path formed by the superposition of the side wall height and top wall width of the first insulating bushing 6, thus meeting insulation requirements. Figure 2As shown, when the top surface of the first insulating bushing 6 is higher than the top surface of the clearance hole 31, the creepage path will first extend upward along the outer peripheral wall of the first insulating bushing 6, and then extend inward along the top wall of the first insulating bushing 6 before it can contact the output shaft 4, thus greatly increasing the total length of the creepage path; Figure 4 As shown, when the top surface of the first insulating bushing 6 is lower than the top surface of the clearance hole 31, the creepage path will first extend inward along the top surface of the first insulating bushing 6. The top surface of the first insulating bushing 6 is preferably stepped, which greatly extends the creepage path. This achieves the goal of effectively extending the creepage distance without increasing the thickness and height of the first insulating bushing 6, ensuring insulation performance, and reducing the radial dimension requirement of the insulating bushing. Furthermore, the height of the first insulating bushing 6 is less than the height of the output shaft 4. Therefore, the overall height of the reduction mechanism will not be changed under the premise of reducing the radial dimension of the first insulating bushing 6, which helps to reduce the overall volume of the reduction mechanism, improve the space utilization of the whole machine, and improve the user experience.

[0033] As a preferred embodiment of this application, as shown in the figure, the reduction mechanism further includes a bearing 9 sleeved on the outside of the output shaft 4. A first insulating bushing 6 is isolated between the bearing 9 and the clearance hole 31, and partially covers the top of the bearing 9. The radial distance between the first insulating bushing 6 and the bearing 9 is less than the minimum radial distance between the first insulating bushing 6 and the output shaft 4. Simultaneously, the first insulating bushing 6 partially covers the top of the bearing 9, enabling the first insulating bushing 6 to axially limit the bearing 9, ensuring the stability of the bearing 9's position, and thus improving the operational stability of the reduction mechanism.

[0034] By including a bearing 9 sleeved on the outside of the output shaft 4 in the reduction mechanism, the output shaft 4 can be isolated from the first bracket 3 through the bearing 9, ensuring that the output shaft 4 can rotate smoothly. At the same time, the first insulating bushing 6 is isolated between the bearing 9 and the clearance hole 31, and the radial distance between the first insulating bushing 6 and the bearing 9 is less than the minimum radial distance between the first insulating bushing 6 and the output shaft 4, so that there is a gap between the first insulating bushing 6 and the output shaft 4. This effectively avoids wear or friction on the first insulating bushing 6 when the output shaft 4 rotates, thereby extending the service life of the first insulating bushing 6 and ensuring that the first insulating bushing 6 can play a stable isolation role for a long time.

[0035] Furthermore, such as Figure 2 As shown, the first insulating bushing 6 includes a clamping section 61 clamped between the clearance hole 31 and the bearing 9, and a first insulating section 62 extending inward from the top of the clamping section 61 and abutting against the top wall of the bearing 9. The first insulating bushing 6 is shielded above the bearing 9 by the first insulating section 62.

[0036] By configuring the first insulating bushing 6 to include a clamping section 61 that clamps between the clearance hole 31 and the bearing 9, and a first insulating section 62 that extends inward from the top of the clamping section 61 and abuts against the top wall of the bearing 9, the clamping section 61 can effectively isolate the clearance hole 31 and the bearing 9. Furthermore, the clamping section 61 can buffer and dampen vibrations, reducing the direct transmission of vibrations generated during high-speed rotation to the first support 3 via the bearing 9. This effectively reduces the overall vibration transmission and improves the stability of the machine's operation. The first insulating section 62, abutting against the top wall of the bearing 9, significantly extends the creepage path from the clearance hole 31 to the bearing 9, preventing current from being transmitted to the bearing 9 and then from the bearing 9 to the output shaft 4, further improving the insulation performance and safety of the reduction mechanism. Simultaneously, the clamping section 61 and the first insulating section 62 covering the bearing 9 achieve double isolation between the first support 3 and the bearing 9 in both vertical and horizontal directions, ensuring that current cannot be transmitted to the bearing 9.

[0037] As a preferred embodiment, such as Figure 2 As shown, an inwardly extending ring rib 32 is also provided at the outer port of the clearance hole 31, and the ring rib 32 is pressed against the top of the first insulating section 62.

[0038] By providing an inwardly extending ring rib 32 at the outer port of the clearance hole 31, and pressing the ring rib 32 above the first insulating section 62, the entire first bracket 3 can achieve axial positioning through the cooperation of the ring rib 32 and the first insulating section 62, ensuring the positional stability of the upper bracket. At the same time, it can achieve axial positioning of the first insulating bushing 6, ensuring the stability of the first insulating bushing 6 in the axial direction, and avoiding axial displacement of the first insulating bushing 6 due to vibration or uneven force during high-speed operation, thereby affecting the insulation effect or damaging structural components.

[0039] As a preferred embodiment of this implementation, such as Figure 2 As shown, the first insulating bushing 6 includes a second insulating section 63 that extends radially outward between the bottom wall of the first bracket 3 and the top wall of the worm gear 8.

[0040] The first insulating bushing 6 includes a second insulating section 63 extending radially outward between the bottom wall of the first support 3 and the top wall of the worm gear 8. This ensures that the creepage distance between the first support 3 and the bearing 9 is first downward along the outer wall of the second insulating section 63, then inward along the bottom wall of the second insulating section 63, and then upward along the inner wall of the second insulating section 63. The creepage distance between the first support 3 and the worm gear 8 is downward along the outer wall of the second insulating section 63. This allows the second insulating section 63 to extend the creepage distance between the first support 3 and the worm gear 8 and the bearing 9, ensuring that the creepage path between the first support 3 and the bearing 9 and the worm gear 8 is tortuous, whether conducting electricity from the bottom or the top of the first support 3. This effectively prevents current from being transmitted to the worm gear 8 or the bearing 9 through short circuits or leakage, further improving the insulation safety and stability of the entire reduction mechanism and ensuring that the equipment maintains reliable insulation performance during long-term operation.

[0041] Furthermore, such as Figure 2 As shown, an insulating gap 7 is provided between the second insulating section 63 and the bottom wall of the first support 3 or the top wall of the worm gear 8. Preferably, the insulating gap 7 is formed between the second insulating section 63 and the top wall of the worm gear 8.

[0042] By providing an insulation gap 7 between the second insulating section 63 and the bottom wall of the first support 3 or the top wall of the worm gear 8, on the one hand, the creepage path transmitted to the output shaft 3 through the second insulating section 63 and the bearing 9 can be increased, further improving the insulation performance of the output shaft 3; on the other hand, the distance between the first support 3 and the worm gear 8 can be further increased, thereby effectively improving the insulation performance and further preventing the current from being directly transmitted to the worm gear 8.

[0043] It should be noted that this application does not specifically limit the insulation method between the second bracket 5 and the output shaft 4, which can be any of the following embodiments: Example 1: As Figure 2 As shown, in this embodiment, the second bracket 5 is made of plastic.

[0044] By making the second bracket 5 out of plastic, the risk of leakage caused by the conductivity of metal is eliminated, further improving the overall insulation safety of the deceleration mechanism. This also reduces the overall weight of the machine, making it easier for users to handle and place the food processor.

[0045] Example 2: As Figure 5 As shown, in this embodiment, the second bracket 5 is made of metal, and a second insulating bushing 12 is provided between the second bracket 5 and the output shaft 4 to isolate the two.

[0046] By setting the second bracket 5 to a metal material and providing a second insulating bushing 12 between the second bracket 5 and the output shaft 4 to isolate the two, insulation isolation between the second bracket 5 and the output shaft 4 is achieved. This ensures that if current is conducted to the second bracket 5 through other paths, it can also be effectively blocked by the second insulating bushing 12, preventing the metal second bracket 5 from becoming a conductive path, thereby further ensuring the safety of the equipment.

[0047] In addition, both of the above-mentioned second bracket 5 schemes can eliminate the need for grounding wiring harnesses, thereby saving production costs and improving production efficiency.

[0048] As a preferred embodiment of this application, such as Figure 4 As shown, the inner peripheral wall of the first insulating bushing 6 is also provided with an inwardly extending annular insulating rib 64.

[0049] By providing an inwardly extending annular insulating rib 64 on the inner peripheral wall of the first insulating bushing 6, the creepage path of the first insulating bushing 6 can be further extended through the annular insulating rib 64. This adds a path formed by the inner peripheral wall of the first insulating bushing 6 and the top wall of the annular insulating rib 64 to the original creepage path, thereby further improving the insulation performance of the first insulating bushing 6. Simultaneously, only the annular insulating rib 64 can be thickened, while the entire first insulating bushing 6 can be made thinner. This not only reduces the amount of material used for demolding the first insulating bushing 6, thus lowering production costs, but also provides a larger heat dissipation gap for the output shaft 3, facilitating its heat dissipation.

[0050] As a preferred embodiment of this application, such as Figure 2 As shown, the top surface of the first insulating bushing 6 is higher than the top surface of the clearance hole 31, and an insulating groove 10 with an upper opening is provided between the first insulating bushing 6 and the clearance hole 31 and between the first insulating bushing 6 and the output shaft 4. The creepage path is formed on the groove wall of the insulating groove 10 and the top surface of the first insulating bushing 6.

[0051] By making the top surface of the first insulating bushing 6 higher than the top surface of the clearance hole 31, and by providing insulating grooves 10 with upper openings between the first insulating bushing 6 and the clearance hole 31, and between the first insulating bushing 6 and the output shaft 4, the creepage path is further extended. First, it extends inward along the bottom wall of the insulating groove 10 near the clearance hole 31, then upward from the outer peripheral wall of the first insulating bushing 6, then inward from the top wall of the first insulating bushing 6, then downward from the inner peripheral wall of the first insulating bushing 6, and finally inward from the bottom wall of the insulating groove 10 near the output shaft 4 to reach the surface of the output shaft 4. This further greatly extends the creepage distance, thereby allowing the first insulating bushing 6 to be made thinner, and thus making the structure of the entire reduction mechanism more compact.

[0052] It should be noted that the extension of the creepage path in this application is not limited to the above-mentioned settings. As another preferred embodiment of this application, this application also protects a food processing machine, including a cup body 1 with a built-in stirring element and a processing chamber, and a main unit 2 with a motor 11 inside. The motor 11 is driven by the stirring element through a reduction mechanism. The reduction mechanism includes a first bracket 3 made of metal and fixedly connected to the motor 11, and a second bracket 5 fixedly connected below the first bracket 3. A worm gear 8 is provided between the first bracket 3 and the second bracket 5, and a device is driven by the worm gear 8 and connected to the first bracket. The output shaft 4 extends outward. The cup body 1 is provided with a metal transmission part. One end of the transmission part is connected to the stirring component, and the other end is located on the outer bottom surface of the cup body 1 and connected to the output shaft 4. The output end of the motor 11 has a worm gear and a worm wheel 8 for transmission connection. The first bracket 3 is provided with a clearance hole 31 for the output shaft 4 to pass through. A first insulating bushing 6 is provided between the clearance hole 31 and the output shaft 4 to isolate the two. An insulating groove 10 is provided between the first insulating bushing 6 and the clearance hole 31 or the output shaft 4 so as to form a tortuous creepage path between the clearance hole 31 and the output shaft 4 through the first insulating bushing 6 and the insulating groove 10.

[0053] like Figure 2 As shown, by simultaneously providing insulating grooves 10 between the first insulating bushing 6 and the clearance hole 31, and between the first insulating bushing 6 and the output shaft 4, the creepage path between the first bracket 3 and the output shaft 4 is no longer a single bushing top wall width, but a more complex creepage path formed by the groove wall of the insulating groove 10 and the top surface of the first insulating bushing 6. This significantly extends the creepage distance without increasing the bushing thickness, further improving the insulation performance. This allows the first insulating bushing 6 to be made thinner, thereby effectively reducing the overall volume of the deceleration mechanism, improving the internal space utilization of the food processing machine, and further optimizing the structural stability and operational reliability of the whole machine.

[0054] It should be noted that this application does not specifically limit the location of the insulating groove 10, such as... Figure 4 As shown, it can be between the first insulating bushing 6 and the output shaft 4; preferably, as shown... Figure 2 As shown, insulating grooves 10 are respectively disposed between the first insulating bushing 6 and the clearance hole 31, and between the first insulating bushing 6 and the output shaft 4. Specifically, the inner insulating groove 10 is composed of the side wall of the output shaft 4, the top wall of the bearing 8, and the inner side wall of the first insulating bushing 6, while the outer insulating groove 10 is composed of the opening wall of the clearance hole, the bottom wall of the first insulating bushing 6, and the outer side wall of the first insulating groove 10. Furthermore, due to the presence of the insulating grooves 10, the clearance utilizes the top wall and at least one side wall of the first insulating bushing 6, thus forming a tortuous insulating path between the clearance hole 31 and the output shaft, greatly extending the path distance. In this case, the top wall of the first insulating bushing 6 can be flush with the top of the clearance hole 31, or it can have a height difference from the top of the clearance hole 31.

[0055] It should be further noted that the core of both of the above-mentioned methods for extending the creepage path is based on forming a tortuous creepage path, which belongs to the same inventive concept.

[0056] The technical solutions protected by this utility model are not limited to the above embodiments. It should be noted that any combination of the technical solutions of any embodiment with one or more other embodiments is within the protection scope of this utility model. Although this utility model has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all 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, comprising a cup body with a built-in stirring element and a processing chamber, and a main unit with a motor inside, wherein the motor is drivenly connected to the stirring element via a reduction mechanism, the reduction mechanism comprising a first bracket made of metal and fixedly connected to the motor, and a second bracket fixedly connected below the first bracket, a worm gear and an output shaft extending from the first bracket and drivenly connected to the worm gear are provided between the first bracket and the second bracket, the output end of the motor has a worm and is drivenly connected to the worm gear, and a metal transmission part is provided inside the cup body, one end of the transmission part being connected to the stirring element, and the other end extending to the outer bottom surface of the cup body and connected to the output shaft, characterized in that... The first bracket is provided with a clearance hole for the output shaft to pass through. A first insulating bushing is provided between the clearance hole and the output shaft to isolate the two. There is a height difference between the top surface of the first insulating bushing and the top surface of the clearance hole, so that a tortuous creepage path is formed between the clearance hole and the output shaft through the side wall height and top wall width of the first insulating bushing.

2. The food processing machine according to claim 1, characterized in that, The deceleration mechanism also includes a bearing sleeved on the outside of the output shaft. The first insulating bushing is isolated between the bearing and the clearance hole and shields the bearing. The radial distance between the first insulating bushing and the bearing is less than the minimum radial distance between the first insulating bushing and the output shaft.

3. A food processing machine according to claim 2, characterized in that, The first insulating bushing includes a clamping section that is clamped between the clearance hole and the bearing, and a first insulating section that extends inward from the top of the clamping section and abuts against the top wall of the bearing.

4. A food processing machine according to claim 3, characterized in that, The outer port of the clearance hole is also provided with an inwardly extending ring rib, which presses against the first insulating section, and the first insulating bushing is shielded above the bearing by the first insulating section.

5. A food processing machine according to claim 2, characterized in that, The first insulating bushing includes a second insulating section extending radially outward between the bottom wall of the first support and the top wall of the worm gear.

6. A food processing machine according to claim 5, characterized in that, An insulating gap is provided between the second insulating section and the bottom wall of the first bracket or the top wall of the worm gear.

7. A food processing machine according to claim 1, characterized in that, The second bracket is made of plastic; or, The second bracket is made of metal, and a second insulating bushing is provided between the second bracket and the output shaft to isolate the two.

8. A food processing machine according to claim 1, characterized in that, The inner peripheral wall of the first insulating bushing is also provided with an inwardly extending annular insulating rib.

9. A food processing machine according to claim 1, characterized in that, The top surface of the first insulating bushing is higher than the top surface of the clearance hole, and there are insulating grooves with upper openings between the first insulating bushing and the clearance hole and between the first insulating bushing and the output shaft. The creepage path is formed on the groove wall of the insulating groove and the top surface of the first insulating bushing.

10. A food processing machine, comprising a cup body with a built-in stirring element and a processing chamber, and a main unit with a motor inside, wherein the motor is drivenly connected to the stirring element via a reduction mechanism, the reduction mechanism comprising a first bracket made of metal and fixedly connected to the motor, and a second bracket fixedly connected below the first bracket, a worm gear and an output shaft extending from the first bracket and drivenly connected to the worm gear are provided between the first bracket and the second bracket, the cup body is provided with a metal transmission part, one end of the transmission part is connected to the stirring element, and the other end is located on the outer bottom surface of the cup body and connected to the output shaft, the output end of the motor has a worm gear drivenly connected to the worm gear, characterized in that... The first bracket is provided with a clearance hole for the output shaft to pass through. A first insulating bushing is provided between the clearance hole and the output shaft to isolate the two. An insulating groove is provided between the first insulating bushing and the clearance hole or the output shaft, so as to form a tortuous creepage path between the clearance hole and the output shaft through the first insulating bushing and the insulating groove.

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