A food processor with smooth operation

Abstract

This invention relates to the field of food processing equipment technology, and discloses a food processing machine with stable operation, including a mixing cup and a main unit equipped with a motor and a reduction mechanism. The reduction mechanism includes a fixed gear ring, a double gear, a moving gear ring, and a planetary carrier that cooperate with each other. The double gear includes a gear with a shaft hole and a gear shaft passing through the shaft hole. The gear shaft and the motor shaft are arranged side by side, and the motor shaft drives the gear and gear shaft to rotate synchronously. The gear includes an upper gear that meshes with the fixed gear ring and a lower gear that meshes with the moving gear ring. The shaft hole wall is provided with a wear-resistant part, which surrounds the gear shaft to limit the radial movement of the gear shaft. The outer surface of the wear-resistant part is fixedly connected to the shaft hole wall, and a heat dissipation gap is provided between the inner surface of the wear-resistant part and the gear shaft. The axial height h2 of the wear-resistant part and the shaft hole wall height h1 satisfy 1 / 2h1<h2≤h1-2mm. This avoids direct contact between the gear shaft and the shaft hole, provides good wear resistance to the shaft hole, ensures good alignment between the gear and the rotating shaft, and ensures stable operation.

Description

Technical Field

[0001] This invention relates to the field of food processing equipment technology, and more specifically to a food processing machine that operates smoothly. Background Technology

[0002] Existing food processing machines, such as a meat grinder that can knead dough, have a kneading rod installed inside the grinding cup, a lid covering the top of the grinding cup, and a main unit mounted on top of the lid. When kneading dough using this food processing machine, the motor inside the main unit drives the kneading rod to rotate via a two-stage reduction gearbox, thereby mixing the ingredients inside the grinding cup.

[0003] This type of main unit uses a double gear transmission. The gearbox contains a fixed gear ring, a double gear, a moving gear ring, and a planetary carrier that mesh with each other. The double gear includes an upper gear that meshes with the fixed gear ring and a lower gear that meshes with the moving gear ring. The motor shaft transmits power to the upper gear through the sun gear. The lower gear drives the planetary carrier and the moving gear ring to rotate, thus forming a two-stage output. The moving gear ring meshes with the dough-making rod after achieving two-stage reduction through the planetary carrier and the double gear. The planetary carrier outputs a higher speed, which can be used to drive the meat grinder.

[0004] During dough kneading, the dough, after forming a ball, is distributed on one side of the grinding cup. Its position is constantly adjusted during mixing, resulting in a significant radial force exerted on the kneading rod. This radial force is transmitted to the inner wall of the gearbox housing via the moving gear ring. Consequently, the entire gearbox bears the radial force transmitted from the lower kneading rod during operation, causing the moving gear ring to wobble. Because the upper gear of the double-geared gear meshes with the fixed gear ring while the lower gear meshes with the wobbled moving gear ring, the double-geared gear as a whole experiences a significant wobble force, leading to high noise levels in the gearbox. The gear shaft of the double-geared gear is axially and radially limited by upper and lower supports located at both ends of the gear shaft. The shaft hole of the double-geared gear has a small clearance fit with the gear shaft. When the double-geared gear experiences a significant wobble force, the gear shaft will correct the wobble to some extent. However, if the wobble of the moving gear ring causes the double-geared gear to experience wobble force for an extended period, a reaming problem may occur between the gear shaft and the central shaft hole of the double-geared gear. Once a reaming problem occurs, the centering and correction effect of the intermediate gear shaft on the double gears disappears, and the wobble of the double gears is aggravated. This will further cause the end faces of the double gears and the upper and lower end faces of the supports at both ends of the gears to be crushed, thereby causing the overall durability failure of the gearbox and affecting the stability of the whole machine. Summary of the Invention

[0005] The purpose of this invention is to provide a food processing machine that operates smoothly, thereby solving the problems of poor durability and poor working stability caused by the double gear transmission in the main body of existing food processing machines.

[0006] To achieve the above object, the present invention provides a food processor with stable operation, which includes a mixing cup and a main body provided with a motor and a reduction mechanism. The reduction mechanism includes a fixed gear ring, a double gear, a moving gear ring and a planet carrier that cooperate with each other. The double gear includes a gear with a shaft hole and a gear shaft passing through the shaft hole. The gear shaft is arranged in parallel with the motor shaft of the motor. The motor shaft drives the gear and the gear shaft to rotate synchronously. The gear includes an upper gear meshing with the fixed gear ring and a lower gear meshing with the moving gear ring. The inner wall of the shaft hole is provided with a wear-resistant member. The wear-resistant member surrounds the gear shaft to radially limit the gear shaft. The outer side surface of the wear-resistant member is fixedly connected to the inner wall of the shaft hole. There is a heat dissipation gap between the inner side surface of the wear-resistant member and the gear shaft. The axial height h2 of the wear-resistant member and the wall height h1 of the shaft hole satisfy 1 / 2h1 < h2 ≤ h1 - 2 mm.

[0007] In the food processor provided by the present invention, by arranging a wear-resistant member on the inner wall of the shaft hole, the wear-resistant member surrounds the gear shaft to radially limit the gear shaft, avoiding direct contact between the gear shaft and the shaft hole, converting the friction between the gear shaft and the shaft hole of the double gear into the friction between the gear shaft and the wear-resistant member, increasing the wear resistance at the shaft hole position, effectively preventing the problem of hole reaming, and the wear-resistant member protects the shaft hole. The wear-resistant member makes the centering of the gear and the gear shaft of the double gear better, and has a certain correction effect on the yaw of the moving gear ring in the reverse direction, so that the centering of the double gear with the moving gear ring and the fixed gear ring is in a good state during the working state, that is, the gear, the shaft hole, the wear-resistant member and the gear shaft are kept on the same axis during the working state, the double gear works more smoothly, reduces the working noise, and reduces the risk of crushing of the double gear on its two ends brackets by ensuring the smoothness of the double gear during the working process, improving the durability of the overall main body. Further, since the gear, the shaft hole, the wear-resistant member and the gear shaft are kept centered during the working process and the double gear works smoothly, it can ensure effective meshing transmission between the double gear and the moving gear ring while effectively meshing with the fixed gear ring, and there will be no problem of gear jamming, enabling the main body to operate normally and smoothly.

[0008] The outer side surface of the wear-resistant member is fixedly connected to the inner wall of the shaft hole, making the wear-resistant member reliably fixed to the hole wall. There is a heat dissipation gap between the inner side surface of the wear-resistant member and the gear shaft. When the yaw of the moving gear ring is relatively large, it causes the gear to yaw. Due to the existence of the heat dissipation gap, at this time, the gear yaw is transmitted to the wear-resistant member, making the wear-resistant member contact the rotating shaft, so as to achieve the effect of reversing the gear by the gear shaft and further the effect of扶正 the moving gear ring; in the state of normal operation of the main body, the inner side surface of the wear-resistant member does not contact the gear shaft, and the heat dissipation gap is beneficial to discharging the friction heat during the working process of the double gear, thus avoiding the heat deformation of the double gear or the upper and lower brackets, resulting in the loosening of the wear-resistant member, preventing the softening of the wear-resistant member due to the friction high temperature during the friction process between the gear shaft and the wear-resistant member, affecting the radial limiting effect, ensuring the centering of the gear and the rotating shaft, and further improving the dynamic balance of the main body during operation.

[0009] The hole wall height h1 of the shaft hole and the axial height h2 of the wear-resistant part satisfy 1 / 2h1 < h2 ≤ h1 - 2 mm. 1 / 2h1 < h2 means that at least half of the hole wall along the axial direction is covered and protected by the wear-resistant part, thus preventing the wear-resistant part from failing to provide effective protection for the shaft hole. The height of the wear-resistant part is more than half the height of the hole wall, effectively protecting the hole wall and improving the wear resistance of the shaft hole. Furthermore, the gear shaft achieves better alignment of the gears, ensuring optimal alignment of the double gear with the moving and fixed gear rings during operation. The axial height h2 of the wear-resistant part is less than the hole wall height h1 of the shaft hole, reducing the wear between the gear shaft and the wear-resistant part. The friction area of ​​the parts is reduced, thereby reducing the heat generated by friction. This prevents the gear shaft from softening due to high temperature during dry grinding of the wear-resistant parts, which would affect the radial limiting effect and reduce the probability of softening and deformation of the upper and lower supports. Since there is relative movement between the gear end face and the upper and lower supports, h2≤h1-2mm avoids direct contact between the high temperature of the wear-resistant parts and the upper and lower supports, and avoids overheating of the gear end face. Therefore, h2≤h1-2mm, while maintaining the height of the wear-resistant parts to ensure a certain anti-shake strength with the shaft hole, avoids excessive frictional heat.

[0010] Preferably, the heat dissipation gap S1 satisfies 0.02mm≤S1≤0.05mm.

[0011] If the heat dissipation gap S1 is less than 0.02mm, the gear shaft and wear-resistant parts will be tightly fitted, while the gear rotation requires a large torque, increasing the overall load on the machine. This also increases the actual friction surface and the probability of friction, leading to rapid heat generation and potentially causing thermal deformation of the double gears or the upper and lower supports, resulting in loosening of the wear-resistant parts. If the heat dissipation gap is greater than 0.05mm, it may cause large gear runout, resulting in high noise during operation, and unstable meshing between the gear and the fixed and moving gear rings, affecting the durability of the double gears and the service life of the main unit. Therefore, a heat dissipation gap S1 of 0.02mm ≤ S1 ≤ 0.05mm can prevent excessive frictional heat caused by the tight fit between the gear shaft and wear-resistant parts, ensure stable gear meshing, guarantee the alignment of the gear and the shaft, improve the wear resistance of the double gears, and extend the service life of the main unit.

[0012] Preferably, the wear-resistant part is interference-fitted into the shaft hole.

[0013] The wear-resistant component is interference-fitted into the shaft hole, providing a certain clamping force to the component and ensuring its reliable fixation within the hole. This prevents the component from falling out and ensures its effective application to the radial force acting on the shaft and gear. The interference fit eliminates the need for connecting components, reducing tolerances and improving alignment between the gear shaft, wear-resistant component, and shaft hole. Furthermore, it simplifies the structure, reduces the rotational load on the double-gear assembly, improves dynamic balance during operation, reduces noise, and enhances the durability and service life of the main unit.

[0014] Preferably, the wear-resistant part is integrally injection molded into the gear as an insert, and the outer surface of the wear-resistant part is provided with an anti-slip structure that mates with the hole wall of the shaft hole.

[0015] Wear-resistant parts are integrally injection molded into gears as inserts, achieving one-step production. The outer surface of the wear-resistant parts is equipped with an anti-slip structure that mates with the hole wall of the shaft hole, thereby ensuring a reliable fit between the wear-resistant parts and the shaft hole and preventing the wear-resistant parts from falling off.

[0016] Preferably, the anti-slip structure is a groove recessed on the outer side of the wear-resistant part, and the hole wall of the shaft hole is provided with a rib corresponding to the groove.

[0017] The anti-slip structure is a groove recessed on the outer side of the wear-resistant part, which facilitates the one-time formation of the raised rib located on the inner wall of the shaft hole during injection molding. The structure is simple and easy to process and produce. The raised rib and the groove have a radial interference fit, which ensures reliable radial fixation of the wear-resistant part. At the same time, the raised rib and the groove mutually limit each other axially, thereby limiting the axial movement of the wear-resistant part and effectively preventing the wear-resistant part from falling off after long-term operation.

[0018] Preferably, the wear-resistant part is fixed in the shaft hole by press fitting.

[0019] The wear-resistant parts are press-fitted and fixed in the shaft hole by press-fitting process, ensuring sufficient interference between the wear-resistant parts and the shaft hole, and effectively preventing the wear-resistant parts from falling off after long-term operation.

[0020] Preferably, the gear shaft has an annular groove along its circumference, and the inner side of the wear-resistant part and the annular groove form an oil storage cavity.

[0021] An oil reservoir is provided between the gear shaft and the wear-resistant parts to avoid generating a lot of heat during dry grinding of the gear shaft and the wear-resistant parts, reducing the probability of softening and deformation of the upper and lower supports. This ensures that the upper and lower supports maintain their effective correction of gear runout, prevents softening of the gear shaft and wear-resistant parts due to frictional high temperature during dry grinding, which would affect the radial limiting effect, ensure the alignment of the gear and the shaft, and thus improve the dynamic balance of the main unit.

[0022] Preferably, the wear-resistant part is a metal sleeve.

[0023] The wear-resistant part is a metal sleeve, which is strong, hard, and wear-resistant. The sleeve shape provides all-round protection for the shaft hole and radial limit for the rotating shaft, thereby avoiding the problems of reaming and enlarging holes, and ensuring the wear resistance and service life of the main unit.

[0024] Preferably, the wear-resistant component includes a plurality of wear-resistant ribs arranged at intervals along the circumferential direction of the gear shaft.

[0025] Multiple wear-resistant ribs can be integrated with the gear to avoid the inconvenience of installing wear-resistant parts, simplify the installation steps, and reduce processing costs.

[0026] Preferably, the top surface of the fixed gear ring is provided with a plurality of heat dissipation holes arranged at intervals along the circumference.

[0027] By setting heat dissipation holes on the fixed gear ring, it is beneficial to dissipate the frictional heat during the operation of the double gear, thereby preventing the double gear or the upper and lower brackets from deforming due to heat and causing the wear-resistant parts to loosen. It also prevents the gear shaft from softening due to high frictional temperature during friction with the wear-resistant parts, which would affect the radial limiting effect, ensure the alignment of the gear and the rotating shaft, and thus improve the dynamic balance of the main unit.

[0028] Preferably, the reduction mechanism further includes brackets located at both ends of the gear shaft. The brackets have mating holes for inserting the gear shaft and mating surfaces facing the gear end face. One of the hole wall and the mating surface is provided with a limiting element for radially limiting the gear shaft.

[0029] By incorporating a limiting component, direct contact between the gear shaft and the bracket can be minimized. This creates a hardness difference between the gear shaft, gear, and bracket, transforming the direct contact into friction between the gear shaft and the limiting component. This improves the wear resistance of the bracket at the limiting component location, protecting the bracket and minimizing the risk of hole enlargement due to excessive wear at the connection between the bracket and gear shaft. Furthermore, the limiting component stabilizes the positional relationship between the gear shaft and gear. Specifically, the limiting component restricts the position of the gear shaft, and the gear, fitted onto the gear shaft, is further restrained by the limiting component, ensuring the gear... The wheel set's moving gear ring plays a certain corrective role in reducing runout, ensuring that the gear, gear shaft, limiting components, and bracket are aligned on the same axis during operation. This makes the gear operation smoother, minimizes the possibility of gear crushing of the bracket, and further improves the wear resistance of the main unit. Furthermore, the limiting components make the connection between the gear shaft and the bracket more compact, reducing wobble and making the gear rotation smoother. This also reduces tooth jamming and gear runout when the fixed and moving gear rings mesh with the gears, ensuring normal operation of the main unit and reducing internal noise.

[0030] The limiting component includes a metal sleeve located inside the mating hole and a wear-resistant gasket located on the mating surface.

[0031] The metal sleeve can fully contact the outer wall of the gear shaft, balancing the torque at various positions on the gear shaft and preventing uneven stress on the limiting components to some extent. It effectively disperses friction and heat, reducing deformation of the gear shaft and support, making the support and gear shaft more stable during engineering operations. This also reduces gear runout and further improves the wear resistance between the gear shaft and support. Wear-resistant shims help prevent direct wear between the support and gear end faces, preventing gear crushing of the support and further enhancing the wear resistance inside the main unit. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0033] Figure 1 This is a schematic diagram of the structure of a food processing machine according to one embodiment of the present invention.

[0034] Figure 2 for Figure 1 Enlarged view of the partial structure of part A in the middle.

[0035] Figure 3 for Figure 1 Enlarged view of a section of the structure in part B.

[0036] Figure 4 This is a schematic diagram of the structure of a wear-resistant component in one embodiment of the present invention.

[0037] Figure 5 This is a schematic diagram of the gear shaft and bracket fitting structure in another embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the oil reservoir on the gear in another embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the wear-resistant component in another embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 10-Stirring cup; 20-Motor; 30-Reduction mechanism; 31-Standing gear ring; 32-Double gear; 321-Gear; 3211-Upper gear; 3212-Lower gear; 322-Gear shaft; 3221-Oil reservoir; 323-Shaft hole; 3231-Rib; 33-Moving gear ring; 34-Planetary carrier; 35-Wear-resistant part; 351-Groove; 352-Wear-resistant sub-part; 353-Wear-resistant sub-part; 36-Upper bracket; 361-Mating hole; 362-Mating surface; 371-Metal sleeve; 372-Wear-resistant gasket; 40-Main unit; 50-Stirring component; 3213-Oil reservoir. Detailed Implementation

[0042] To more clearly illustrate the overall concept of the present invention, a detailed description will be provided below with reference to the accompanying drawings and examples.

[0043] 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 may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited by the specific embodiments disclosed below.

[0044] As Figure 1 shown, in one embodiment of the present invention, a food processor with stable operation is provided, which includes a mixing cup 10 and a main body 40 provided with a motor 20 and a speed reduction mechanism 30. The speed reduction mechanism 30 includes a fixed gear ring 31, a double gear 32, a moving gear ring 33 and a planet carrier 34 that cooperate with each other. The double gear 32 includes a gear 321 having a shaft hole 323 and a gear shaft 322 disposed through the shaft hole. The gear shaft 322 is arranged in parallel with the motor shaft of the motor. The motor shaft drives the gear 321 and the gear shaft 322 to rotate synchronously. The gear 321 includes an upper gear 3211 meshing with the fixed gear ring and a lower gear 3212 meshing with the moving gear ring. The inner wall of the shaft hole is provided with a wear-resistant member 35. The wear-resistant member 35 is disposed around the gear shaft 322 to radially limit the gear shaft 322. The outer side surface of the wear-resistant member 35 is fixedly connected to the inner wall of the shaft hole 323. There is a heat dissipation gap between the inner side surface of the wear-resistant member 35 and the gear shaft 322. The axial height h2 of the wear-resistant member 35 and the wall height h1 of the shaft hole satisfy 1 / 2h1 < h2 ≤ h1 - 2 mm.

[0045] As Figure 1 shown in [figure reference], a mixing member 50 is disposed in the mixing cup 10, and the main body 40 is disposed above the mixing cup 10 to drive the mixing member 50 to rotate. The mixing member 50 may include a dough mixing rod or a meat mincing knife. The meat mincing knife and the dough mixing rod are respectively detachably connected to the output ends of the planet carrier 34 and the moving gear ring, so that the food processor can not only implement the meat mincing function but also the dough mixing function.

[0046] The food processing machine provided by the present invention provides a wear-resistant part 35 on the wall of the shaft hole 323. The wear-resistant part 35 is arranged around the gear shaft 322 to radially limit the gear shaft 322, thereby avoiding direct contact between the gear shaft 322 and the shaft hole 323. The friction between the gear shaft 322 and the shaft hole 323 of the double gear 32 is converted into friction between the gear shaft 322 and the wear-resistant part 35, which increases the wear resistance of the shaft hole 323 and effectively prevents the hole reaming problem. The wear-resistant part 35 protects the shaft hole 323. Wear-resistant component 35 ensures good alignment between the double gear 32 and the gear shaft 322, and provides some correction to the runout of the moving gear ring 33. This ensures that the alignment of the double gear 32 with the moving gear ring 33 and the fixed gear ring 31 is good during operation. Specifically, the double gear 32, shaft hole 323, wear-resistant component 35, and gear shaft 322 remain on the same axis during operation. This results in smoother operation of the double gear 32, reduced operating noise, and reduced risk of crushing of the supports at both ends by ensuring smooth operation of the main unit. Furthermore, because the double gear 32, shaft hole 323, wear-resistant component 35, and gear shaft 322 remain aligned during operation, the double gear 32 operates smoothly, ensuring effective meshing with both the moving gear ring 33 and the fixed gear ring 31 simultaneously, preventing gear jamming and ensuring smooth and normal operation of the main unit. The outer side of the wear-resistant part 35 is fixedly connected to the wall of the shaft hole 323, and a heat dissipation gap is provided between the inner side of the wear-resistant part 35 and the gear shaft 322, so that the wear-resistant part 35 is reliably fixed to the hole wall. The heat dissipation gap is conducive to the discharge of frictional heat during the operation of the double gear 32, thereby preventing the double gear 32 or the upper and lower brackets from being deformed by heat and causing the wear-resistant part 35 to loosen. It also prevents the gear shaft 322 from softening due to high frictional temperature during friction with the wear-resistant part 35, which would affect the radial limiting effect. This ensures the alignment of the double gear 32 with the rotating shaft, thereby improving the dynamic balance of the main unit.

[0047] The hole wall height h1 of the shaft hole and the axial height h2 of the wear-resistant part satisfy 1 / 2h1 < h2 ≤ h1 - 2 mm. 1 / 2h1 < h2 means that at least half of the hole wall along the axial direction is covered and protected by the wear-resistant part, thus preventing the wear-resistant part from failing to provide effective protection for the shaft hole. The height of the wear-resistant part is more than half the height of the hole wall, effectively protecting the hole wall and improving the wear resistance of the shaft hole. Furthermore, the gear shaft achieves better alignment of the gears, ensuring optimal alignment of the double gear with the moving and fixed gear rings during operation. The axial height h2 of the wear-resistant part is less than the hole wall height h1 of the shaft hole, reducing the wear between the gear shaft and the wear-resistant part. The friction area of ​​the parts is reduced, thereby reducing the heat generated by friction. This prevents the gear shaft from softening due to high temperature during dry grinding of the wear-resistant parts, which would affect the radial limiting effect and reduce the probability of softening and deformation of the upper and lower supports. Since there is relative movement between the gear end face and the upper and lower supports, h2≤h1-2mm avoids direct contact between the high temperature of the wear-resistant parts and the upper and lower supports, and avoids overheating of the gear end face. Therefore, h2≤h1-2mm, while maintaining the height of the wear-resistant parts to ensure a certain anti-shake strength with the shaft hole, avoids excessive frictional heat.

[0048] In a preferred embodiment, such as Figure 1-3 As shown, the heat dissipation gap S1 satisfies 0.02mm≤S1≤0.05mm.

[0049] If the heat dissipation gap S1 is less than 0.02mm, the gear shaft 322 and the wear-resistant part 35 will be tightly fitted, while the gear 321 will require a large torque to rotate, increasing the overall load on the machine. This also increases the actual friction surface and the probability of friction, leading to rapid heat generation. This could cause the double gear 32 or the upper and lower supports to deform due to heat, resulting in the wear-resistant part 35 becoming loose. If the heat dissipation gap is greater than 0.05mm, the gear 321 may have a large runout, resulting in high noise during operation. Furthermore, the meshing amount between the gear 321 and the fixed gear ring 31 and the moving gear ring 33 will be unstable, affecting the durability of the double gear 32 and the service life of the main unit. Therefore, the heat dissipation gap S1 should be 0.02mm≤S1≤0.05mm. This avoids excessive frictional heat caused by the tight fit between the gear shaft 322 and the wear-resistant part 35, ensures stable meshing of the gear 321, guarantees the alignment of the double gear 32 and the rotating shaft, improves the wear resistance of the double gear 32, and extends the service life of the main unit.

[0050] In a preferred embodiment, the wear-resistant part 35 is interference-fitted into the shaft hole 323.

[0051] The wear-resistant part 35 is interference-fitted into the shaft hole 323, so that the shaft hole 323 has a certain clamping force on the wear-resistant part 35, thereby ensuring the reliable fixation of the wear-resistant part 35 in the shaft hole 323, preventing the wear-resistant part 35 from falling off, and ensuring that the wear-resistant part 35 effectively supports the radial action of the rotating shaft and gear 321. The interference fit of the wear-resistant part 35 into the shaft hole 323 eliminates the need for connecting parts to the shaft hole 323. On the one hand, it reduces the fit tolerance, which is conducive to improving the alignment of the gear shaft 322, the wear-resistant part 35 and the shaft hole 323. On the other hand, it simplifies the structure, reduces the rotational load of the double gear 32, which is conducive to improving the dynamic balance of the double gear 32 during operation, reducing working noise, and improving the durability and service life of the main unit.

[0052] The present invention does not limit the assembly method of the wear-resistant part 35, for example,

[0053] In a first preferred embodiment, the wear-resistant part 35 is integrally injection molded into the gear 321 as an insert, and the outer surface of the wear-resistant part 35 is provided with an anti-slip structure that cooperates with the hole wall of the shaft hole 323.

[0054] The wear-resistant part 35 is integrally injection molded into the gear 321 as an insert, and the production is completed in one step. The outer side of the wear-resistant part 35 is provided with an anti-slip structure that matches the hole wall of the shaft hole 323, thereby ensuring a reliable fit between the wear-resistant part 35 and the shaft hole 323 and preventing the wear-resistant part 35 from falling off.

[0055] More specifically, such as Figure 4 As shown, the anti-slip structure is a groove 351 recessed on the outer side of the wear-resistant part 35, and the hole wall of the shaft hole 323 is provided with a rib 3231 corresponding to the groove.

[0056] The anti-slip structure is a groove 351 recessed on the outer side of the wear-resistant part 35, which facilitates the one-time formation of the rib 3231 located on the inner wall of the shaft hole 323 during injection molding. The structure is simple and easy to process and produce. The rib 3231 and the groove 351 are radially interference-fitted to ensure reliable radial fixation of the wear-resistant part 35. At the same time, the rib 3231 and the groove 351 mutually limit each other axially, thereby limiting the axial movement of the wear-resistant part 35 and effectively preventing the wear-resistant part 35 from falling off after long-term operation.

[0057] Of course, those skilled in the art will understand that the anti-slip structure can also be provided with knurling on the outer side of the wear-resistant part 35. The knurling increases the friction surface between the wear-resistant part and the shaft hole wall, thereby increasing the friction between the two and preventing the wear-resistant part from falling off.

[0058] In the second preferred embodiment, the wear-resistant part 35 is press-fitted into the shaft hole 323. That is, the wear-resistant part 35 is press-fitted into the shaft hole 323 using a press-fitting machine and a press-fitting process, ensuring sufficient interference fit between the wear-resistant part 35 and the shaft hole 323, effectively preventing the wear-resistant part 35 from falling off after long-term operation.

[0059] In a preferred embodiment, the gear shaft 322 is provided with an annular groove along its circumference, and the inner side of the wear-resistant part 35 and the annular groove form an oil storage cavity 3221.

[0060] An oil reservoir is provided between the gear shaft 322 and the wear-resistant part 35 to avoid generating a large amount of heat during dry grinding of the gear shaft 322 and the wear-resistant part 35, reducing the probability of softening and deformation of the upper and lower supports. This ensures that the upper and lower supports maintain the effective correction of the gear 321's runout, preventing the gear shaft 322 from softening due to frictional high temperature during dry grinding of the wear-resistant part 35 and affecting the radial limiting effect, ensuring the alignment of the double gear 32 and the rotating shaft, and thus improving the dynamic balance of the main unit.

[0061] In another preferred embodiment, such as Figure 6 As shown, an oil reservoir 3213 is provided on the upper end face of the gear 321. During the operation of the main unit, the oil in the oil reservoir 3213 can flow between the wear-resistant parts and the gear shaft to avoid dry friction. Preferably, three oil reservoirs 3213 are provided along the circumference of the gear.

[0062] Of course, in practice, an oil reservoir 3213 can be provided on the end face of the gear, and an annular groove can be provided on the gear shaft 322 along its circumference to form an oil reservoir cavity and avoid dry grinding.

[0063] In a preferred embodiment, the wear-resistant component 35 is a metal sleeve.

[0064] Wear-resistant part 35 is a metal sleeve with high strength, high hardness and wear resistance. It adopts a sleeve shape to protect the shaft hole 323 in all directions and to limit the radial movement of the rotating shaft in all directions, thereby avoiding the problems of reaming and enlarging holes in all directions, and ensuring the wear resistance and service life of the main unit.

[0065] Preferably, the wear-resistant part 35 is made of copper sleeve. Copper sleeve has high hardness and wear resistance, which can provide good protection for shaft hole 323, which is conducive to maintaining the dynamic balance between gear shaft 322 and gear 321, and ensuring smooth operation of the main machine.

[0066] In a preferred embodiment, the top surface of the fixed gear ring 31 is provided with a plurality of heat dissipation holes arranged at intervals along the circumference.

[0067] By setting heat dissipation holes in the fixed gear ring 31, it is beneficial to dissipate the frictional heat of the double gear 32 during operation, thereby preventing the double gear 32 or the upper and lower supports from deforming due to heat and causing the wear-resistant part 35 to loosen. It also prevents the gear shaft 322 from softening due to high frictional temperature during friction with the wear-resistant part 35, which would affect the radial limiting effect. This ensures the alignment of the double gear 32 with the rotating shaft, thereby improving the dynamic balance of the main unit.

[0068] In a preferred embodiment, such as Figure 5The reduction mechanism also includes supports located at both ends of the gear shaft, namely an upper support 36 and a lower support. It should be noted that in this embodiment, the planet carrier 34 constitutes the lower support, or it can be understood that the planet carrier and the lower support are integrally set. The support has a mating hole 361 for inserting the gear shaft 322 and a mating surface 362 facing the end face of the gear. One of the hole wall and the mating surface is provided with a limiting member 37 for radially limiting the gear shaft 322.

[0069] Preferably, the limiting member 37 includes a metal sleeve 371 located in the mating hole and a wear-resistant gasket 372 located on the mating surface.

[0070] Of course, the present invention does not limit the specific structure of the limiting member 37. For example, in another embodiment, the limiting member 37 is only a metal sleeve provided in the mating hole; or, the limiting member 37 is only a wear-resistant gasket provided on the mating surface.

[0071] Specifically, the metal sleeve is made of copper; the wear-resistant gasket can be made of bakelite or Teflon.

[0072] By setting the limiting member 37, direct contact between the gear shaft 322 and the bracket can be avoided to the greatest extent. This creates a hardness difference between the gear shaft 322, the gear 321, and the bracket, transforming the direct contact between the gear shaft 322 and the bracket into friction between the gear shaft 322 and the limiting member 37. This improves the wear resistance of the bracket at the location of the limiting member 37, protecting the bracket and minimizing the risk of hole enlargement due to excessive wear at the connection between the bracket and the gear shaft 322. Furthermore, the limiting member 37 makes the positional relationship between the gear shaft 322 and the gear 321 more stable. Specifically, the limiting member 37 limits the position of the gear shaft 322, and the gear 321 is fitted onto the gear shaft 322, thus allowing the limiting member 37 to exert a certain degree of pressure on the gear 321. The limiting element 37 helps to correct the runout of the moving gear ring 33, ensuring that the gear 321, gear shaft 322, limiting element 37, and bracket are on the same axis during operation. This makes the operation of the gear 321 more stable and prevents the gear 321 from crushing the bracket, further improving the wear resistance of the main unit. Furthermore, the limiting element 37 makes the connection between the gear shaft 322 and the bracket more compact, reducing the wobble between them and making the rotation of the gear 321 more stable. It also reduces the jamming of the gear 321 and the runout of the gear 321 when the fixed gear ring and moving gear ring are engaged with the gear 321, ensuring the normal operation of the main unit and reducing the noise inside the main unit.

[0073] It should also be noted that, in addition to being sleeve-shaped, wear-resistant parts can also be: wear-resistant parts include multiple wear-resistant ribs arranged at intervals along the circumference of the gear shaft, with the wear-resistant ribs extending axially along the shaft hole.

[0074] Multiple wear-resistant ribs can be integrated with the gear to avoid the inconvenience of installing wear-resistant parts, simplify the installation steps, and reduce processing costs.

[0075] It should be noted that the present invention does not limit the specific structure of the wear-resistant part 35. For example, in Figure 1-4 In the preferred embodiment shown, the wear-resistant component 35 is a metal sleeve. In another preferred embodiment, such as Figure 7 As shown, the wear-resistant component 35 includes two wear-resistant sub-components 352 and 353 arranged axially along the gear shaft, with the wear-resistant sub-components 352 and 353 located at the upper and lower parts of the shaft hole 323, respectively.

[0076] Wear-resistant component 35 includes two wear-resistant sub-components to protect the upper and lower parts of the shaft hole respectively. This eliminates the need to place a wear-resistant component in the middle of the shaft hole, which is the part where the shaft hole is least damaged during wobbling. This simplifies the installation process and reduces processing costs while protecting the shaft hole.

[0077] More preferably, the bracket has a mating hole for inserting the end of the gear shaft, and the limiting member is fixed to the wall of the mating hole, with the gear shaft and the limiting member having a clearance fit.

[0078] This application utilizes a clearance fit between the gear shaft 322 and the limiting member 37 to facilitate the assembly of the gear shaft 322 and the limiting member 37. Furthermore, the limiting member 37 is fixed to the wall of the mating hole opened on the bracket, which can prevent the bracket from directly contacting the gear shaft 322 to the greatest extent, thereby improving the wear resistance of both and reducing wear, thus ensuring the service life of the bracket and the gear shaft 322.

[0079] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "top", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0080] The technical solutions protected by this invention 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 invention. Although the invention 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 invention are within the scope of protection claimed by this invention.

Claims

1. A food processing machine with smooth operation, comprising a mixing cup and a main unit equipped with a motor and a reduction mechanism, wherein the reduction mechanism comprises a fixed gear ring, a double gear ring, a movable gear ring, and a planetary carrier that cooperate with each other, the double gear ring comprising a gear with a shaft hole and a gear shaft passing through the shaft hole, the gear shaft being arranged parallel to the motor shaft of the motor, the motor shaft driving the gear and the gear shaft to rotate synchronously, the gear comprising an upper gear meshing with the fixed gear ring and a lower gear meshing with the movable gear ring, characterized in that, The hole wall of the shaft hole is provided with a wear-resistant component. The wear-resistant component is arranged around the gear shaft to limit the radial movement of the gear shaft. The outer side of the wear-resistant component is fixedly connected to the hole wall of the shaft hole. A heat dissipation gap is provided between the inner side of the wear-resistant component and the gear shaft. The axial height h2 of the wear-resistant component and the hole wall height h1 of the shaft hole satisfy 1 / 2h1<h2≤h1-2mm.

2. The food processing machine with stable operation according to claim 1, characterized in that, The heat dissipation gap S1 satisfies 0.02mm≤S1≤0.05mm.

3. The food processing machine with stable operation according to claim 1, characterized in that, The wear-resistant component is interference-fitted into the shaft hole.

4. The food processing machine with stable operation according to claim 3, characterized in that, The wear-resistant part is integrally injection molded into the gear as an insert, and the outer surface of the wear-resistant part is provided with an anti-slip structure that mates with the hole wall of the shaft hole.

5. A food processing machine with stable operation according to claim 4, characterized in that, The anti-slip structure is a groove recessed on the outer side of the wear-resistant part, and the hole wall of the shaft hole is provided with a rib corresponding to the groove.

6. The food processing machine with stable operation according to claim 3, characterized in that, The wear-resistant part is fixed in the shaft hole by press fitting.

7. The food processing machine with stable operation according to claim 1, characterized in that, The gear shaft has an annular groove along its circumference, and the inner side of the wear-resistant part and the annular groove form an oil storage cavity.

8. The food processing machine with stable operation according to claim 1, characterized in that, The wear-resistant component is a metal sleeve, or the wear-resistant component includes a plurality of wear-resistant ribs arranged at intervals along the circumferential direction of the gear shaft.

9. A food processing machine with stable operation according to claim 1, characterized in that, The top surface of the fixed gear ring is provided with multiple heat dissipation holes arranged at intervals along the circumference.

10. A food processing machine with stable operation according to claim 1, characterized in that, The deceleration mechanism further includes brackets located at both ends of the gear shaft. The brackets have mating holes for inserting the gear shaft and mating surfaces facing the end face of the gear. One of the hole wall of the mating hole and the mating surface is provided with a limiting member for radially limiting the gear shaft. The limiting component includes a metal sleeve located inside the mating hole and a wear-resistant gasket located on the mating surface.

Images