Portable food processor

Abstract

The utility model discloses a portable food processor which comprises a base, a driving mechanism arranged in the base, a stirring cup arranged on the base and a smashing cutter which is arranged on the base, driven by the driving mechanism and extends into the stirring cup, and the lower end of the stirring cup is open and connected with the base in a sealed mode. The base comprises a base outer shell and a base lower shell installed at the bottom of the base outer shell, the driving mechanism comprises a brushless motor and a gear box which are integrally fixed in the axial direction, the brushless motor is fixed to the base outer shell, the input end of the gear box is connected with a motor shaft of the brushless motor, and an output shaft of the gear box drives the smashing cutter to rotate. Torque is increased under the condition that the size is not increased, and integration of small size, large torque, high rotating speed and stable and reliable transmission is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of small kitchen appliances, and particularly relates to a food processor. Background Art

[0002] An ordinary food processor is connected to the mains power supply, so a series motor is usually used as the driving source and is combined with a gearbox for driving to increase the torque. The gearbox can also be omitted and the series motor can directly drive.

[0003] However, for a portable food processor, the requirements of being small and portable need to be met. Some do not have a gearbox, but have higher requirements for the motor, which not only causes a sharp increase in cost, but also results in a smaller output torque and a worse crushing effect. Some are also combined with a gearbox for driving to increase the torque. However, due to miniaturization and usually using a battery as the power source, in order to ensure the crushing effect, a reduction gearbox with a large reduction ratio is used to ensure the output torque, but this will cause the volume to be too large and the structure to become complicated.

[0004] Referring to the Chinese utility model patent with the authorization announcement number of CN 220320263 U, which discloses a motor reduction gearbox for a bean grinder, including a bean grinder motor, a three-stage sun gear disc, a three-stage planetary gear base, a double gear, a two-stage planetary pinion, a three-stage planetary pinion, an outer shell gear ring and a reduction gearbox connection base provided on the output end side of the bean grinder motor. Only one double gear is fixedly connected to the reduction gearbox connection base through a corresponding gear positioning shaft. The motor is still a series motor. The series motor has a fast starting speed and a large starting torque. However, when the load is large, the armature winding may burn out or be damaged. Especially when the motor is small, it cannot provide a large torque. The multi-stage reduction of the reduction gearbox increases the torque, but it also causes too much reduction and it is difficult to ensure the crushing effect. Summary of the Utility Model

[0005] Aiming at the defects of the prior art, the technical problem to be solved by the utility model is to provide a portable food processor, which can increase the torque without increasing the volume, and realizes the combination of small volume, large torque and high speed.

[0006] To solve the above technical problems, the present utility model adopts the following technical solutions: A portable food processor, comprising a base, a drive mechanism disposed within the base, a mixing cup disposed on the base, and a crushing knife disposed on the base and driven by the drive mechanism to extend into the mixing cup. The lower end of the mixing cup is open and is hermetically connected to the base. The base includes a base housing and a base lower housing installed at the bottom of the base housing. The drive mechanism includes a brushless motor and a gearbox integrally fixed along the axis. The brushless motor is fixed to the base housing. The input end of the gearbox is connected to the motor shaft of the brushless motor, and the output shaft of the gearbox drives the crushing knife to rotate.

[0007] Preferably, the gearbox includes a gearbox body composed of a gearbox upper cover and a gearbox lower cover, and a planetary gear train disposed within the gearbox body. The brushless motor is provided with a motor upper cover. The gearbox lower cover is fixed to the motor upper cover. The output shaft of the gearbox sequentially passes upward through the gearbox upper cover and the top wall of the base housing.

[0008] Preferably, the planetary gear train includes a sun gear, an internal gear ring, and planetary gears. The planetary gears are fixed to the gearbox body through planetary pins. The motor shaft passes through the gearbox lower cover and is connected to the sun gear. The planetary gears are respectively engaged with the sun gear and the internal gear ring, and the internal gear ring is connected to the output shaft.

[0009] Preferably, a shaft seal is installed on the output shaft. The motor upper cover is fixed to the base housing through fasteners and generates an upward axial force, so that the gearbox upper cover and the base housing cooperate to axially fix the shaft seal.

[0010] Preferably, a stepped shaft hole with a smaller upper diameter and a larger lower diameter is provided at the center of the upper part of the outer side of the base. The output shaft passes through the stepped shaft hole. A central convex portion protruding upward is provided at the center of the gearbox upper cover. The central convex portion is inserted into the stepped shaft hole. The shaft seal includes an upper axial part and a lower axial part. The upper axial part cooperates with the output shaft and the upper side of the stepped shaft hole, and the lower axial part cooperates with the central convex portion and the lower side of the stepped shaft hole.

[0011] Preferably, there is an axial gap between the lower end of the axial direction of the internal gear ring and the gearbox lower cover; and / or, a radial limiting rib is provided on the outer side of the radial direction of the internal gear ring, and the radial limiting rib cooperates with the inner ring of the gearbox upper cover to limit the radial runout of the internal gear ring.

[0012] Preferably, a ball bearing is installed on the output shaft, and the outer ring of the ball bearing is fixed to the gearbox upper cover.

[0013] Preferably, an axial limiting step for limiting and cooperating with the lower end face of the inner ring of the ball bearing is provided on the output shaft, and a hole limiting step for limiting and cooperating with the lower end face of the outer ring of the ball bearing is provided on the gearbox upper cover.

[0014] Preferably, an upper cover piece is provided above the planetary gear inside the upper cover of the gearbox. The lower end of the planetary pin is inserted into the pin hole on the lower cover of the gearbox and installed with interference fit, and the upper end of the planetary pin is connected to the pin hole on the upper cover piece; and / or, the internal gear ring includes an axial part with a gear ring arranged on the inner wall and an upper end part connected to the upper end of the axial part, and the output shaft is connected to the upper end part.

[0015] Preferably, a battery is provided below the brushless motor, and a drive circuit is connected between the battery and the brushless motor.

[0016] The technical solution adopted by the present utility model has the following beneficial effects:

[0017] 1. The driving mechanism and the crushing knife are both arranged on the base. The lower end of the mixing cup is open and is hermetically connected to the base. In this way, the driving mechanism passes upward through the lower opening of the mixing cup and extends into the crushing cup and is connected to the crushing knife. Then, there is no need to set a shaft seal structure between the crushing cup and the driving mechanism, and the crushing cup and the base share a part of the internal space, with a compact structure, which can reduce the overall height of the machine and meet the design requirements of the overall portability of the machine.

[0018] Among them, the driving mechanism adopts a combination of a brushless motor and a gearbox. The brushless motor has the advantage of high efficiency, and the gearbox can adopt a gearbox with a small reduction ratio, which can increase the torque without excessive reduction, ensuring that the driving mechanism drives the crushing knife to rotate at a high speed; and in order to avoid excessive volume, the brushless motor and the gearbox are integrally fixed, and then the whole is fixed to the base housing, maximizing the use of the internal space of the base housing, with a compact structure, increasing the torque without increasing the volume and without too much reduction.

[0019] In addition, since the brushless motor and the gearbox are integrally fixed and then the whole is fixed to the base housing, and the input end of the gearbox is connected to the motor shaft of the brushless motor, and the output shaft of the gearbox drives the crushing knife to rotate. In this way, the coaxiality of the series output can be ensured, and since the output shaft of the driving mechanism is directly connected to the crushing knife, stable and reliable transmission can be achieved.

[0020] To sum up, the present utility model increases the torque without increasing the volume, achieving the combination of small volume, large torque, high speed and stable and reliable transmission.

[0021] 2. The main characteristics of the planetary gear train transmission adopted by the gearbox are small volume, large load-bearing capacity, stable operation and low noise, which is beneficial to increasing the torque of the whole driving mechanism without increasing the volume and without too much reduction.

[0022] In addition, after the upper cover of the gearbox and the lower cover of the gearbox are fixed, they form the gearbox body. The lower cover of the gearbox is fixed to the upper cover of the motor. In this way, the upper cover of the gearbox, the lower cover of the gearbox, and the upper cover of the motor are fixed together, and then the whole is fixed to the base shell. On the one hand, the overall structure is compact, the occupied space can be compressed, which is beneficial to reducing the overall volume of the driving mechanism. On the other hand, it is also convenient for installation.

[0023] 3. This planetary gear train is different from the conventional planetary bracket output. Since the planetary pin is fixed to the gearbox body, the planetary gear can only rotate but not revolve, and the internal gear ring outputs, thereby increasing the torque without increasing the volume and without much deceleration.

[0024] 4. In order to ensure the seal between the output shaft and the upper cover of the gearbox, a shaft seal is installed on the output shaft. Since the upper cover of the motor is fixed to the base shell through fasteners and generates an upward axial force, the upper cover of the gearbox and the base shell cooperate to axially fix the shaft seal.

[0025] 5. The shaft seal includes an upper axial part and a lower axial part. The upper axial part cooperates with the output shaft and the upper side of the stepped shaft hole, and seals the central convex part and the end of the ball bearing. The lower axial part cooperates with the central convex part and the lower side of the stepped shaft hole. In this way, a radial and axial sealing fit is formed between the shaft seal, the stepped shaft hole, and the output shaft to avoid leakage.

[0026] 6. Since there is an axial gap between the lower end of the axial direction of the internal gear ring and the lower cover of the gearbox, a radial limiting rib is provided on the radial outer side of the internal gear ring. The radial limiting rib cooperates with the inner ring of the upper cover of the gearbox to limit the radial runout of the internal gear ring. In this way, the rotation resistance of the output shaft of the internal gear ring is small, and the radial runout during the high-speed rotation of the output shaft is reduced.

[0027] 7. The installation position of the ball bearing is positioned by the cooperation of the shaft limiting step and the hole limiting step. Through the rolling support of the ball bearing, the smooth rotation of the output shaft is realized.

[0028] 8. The lower end of the planetary pin is inserted into the pin hole on the lower cover of the gearbox and installed with interference fit. The upper end of the planetary pin is connected to the pin hole on the upper cover piece, thereby ensuring the installation accuracy of the planetary gear. It is not easy to shift during operation, improving the operation accuracy and reducing the operation noise.

[0029] The specific technical solutions adopted by the present utility model and the beneficial effects brought by them will be detailedly disclosed in the following specific implementation manners in combination with the drawings. Brief Description of the Drawings

[0030] The present utility model will be further described below in conjunction with the drawings and specific implementation manners:

[0031] Figure 1 It is a schematic diagram of the whole machine after the mixing cup is placed on the base;

[0032] Figure 2 Schematic structural diagram in the state where the mixing cup is separated from the base;

[0033] Figure 3 Cross-sectional view of the base;

[0034] Figure 4 Schematic diagram of a partial cross-section of the whole machine;

[0035] Figure 5 For Figure 4 Enlarged structural schematic diagram at position A in

[0036] Figure 6 Schematic structural diagram of the combination of the brushless motor and the gearbox;

[0037] Figure 7 Cross-sectional view after the combination of the brushless motor and the gearbox;

[0038] Figure 8 Cross-sectional view of the gearbox;

[0039] Figure 9 Schematic structural diagram of the decomposition of the brushless motor and the gearbox;

[0040] Figure 10 Exploded view of the base housing and the base lower housing;

[0041] Figure 11 Cross-sectional view of the base;

[0042] In the figure: base 1, base lower housing 101, base housing 102, positioning post 1021, stepped shaft hole 1022, mounting groove 103, brushless motor 11, motor shaft 111, motor upper cover 112, positioning groove 1121, gearbox 12, gearbox lower cover 121, screw 1211, gearbox upper cover 122, central convex part 1221, hole limiting step 1222, sun gear 123, planetary pin 124, planetary gear 125, upper cover plate 126, internal gear ring 127, axial part 1271, upper end part 1272, output shaft 1273, radial limiting rib 1274, shaft limiting step 1275, ball bearing 128, shaft seal 129, axially lower part 1291, axially upper part 1292, crushing knife 13, battery 14, mixing cup 2, threaded joint 21, cup cover 22, handle 23. Specific embodiments

[0043] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0044] Those skilled in the art can understand that, without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0045] The terms used in the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. For example, the terms indicating orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are only based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present utility model.

[0046] In the present utility model, unless otherwise clearly specified and defined, the terms such as "installation", "connection", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] As Figures 1 to 11 shown, this embodiment provides a portable food processor, which includes a base 1, a driving mechanism disposed in the base 1, a mixing cup 2 disposed on the base 1, and a crushing knife 13 disposed on the base and driven by the driving mechanism and extending into the mixing cup 2. Among them, both the upper and lower ends of the mixing cup 2 are open. A cup cover 22 is provided at the upper opening, and the lower opening is detachably connected to the base 1. The driving mechanism can extend into the crushing cup and be connected to the crushing knife, so that the crushing knife is driven to rotate by the driving mechanism. There is no need to provide a shaft seal structure between the crushing cup and the driving mechanism, and the crushing cup and the base share a part of the internal space, with a compact structure, which can reduce the overall height of the machine and meet the design requirements of the overall portability of the machine. The base 1 includes a base outer shell 102 and a base lower shell 101 installed at the bottom of the base outer shell. Taking the common cylindrical shape of the portable food processor as an example, the base 1 and the mixing cup 2 are also cylindrical. The base outer shell 102 is cylindrical, and the base lower shell 101 closes the bottom opening of the base outer shell and can be connected by a buckle or a screw. The driving mechanism includes a battery 14, a brushless motor 11, and a gearbox 12 arranged axially from bottom to top in sequence. The brushless motor 11 and the gearbox 12 are integrally fixed, and the brushless motor 11 is fixed to the base outer shell 102. The input end of the gearbox 12 is connected to the motor shaft 111 of the brushless motor 11, and the output shaft of the gearbox 12 drives the crushing knife 13 to rotate. A driving circuit is connected between the battery 14 and the brushless motor 11.

[0048] Of course, the battery can also be not set, so as to further reduce the volume, making the volume of the base smaller, especially the axial height can be reduced a lot. After the battery is not set, it can be powered by an external wireless power supply, that is, wireless power supply is adopted, and the machine is powered through non-physical contact power transmission.

[0049] Among them, the drive mechanism adopts a combination of a brushless motor and a gearbox. The brushless motor has the advantage of high efficiency, and the gearbox can adopt a gearbox with a small reduction ratio, which can increase the torque without excessive reduction, ensuring that the drive mechanism drives the crushing knife to rotate at a high speed; and in order to avoid excessive volume, the brushless motor and the gearbox are integrally fixed, and then the whole is fixed to the base shell, maximizing the use of the internal space of the base shell, with a compact structure, increasing the torque without increasing the volume and without too much reduction.

[0050] In addition, since the brushless motor and the gearbox are integrally fixed and then the whole is fixed to the base shell, and the input end of the gearbox is connected to the motor shaft of the brushless motor, and then the output shaft of the gearbox drives the crushing knife to rotate. In this way, the coaxiality of the series output can be ensured, and since the output shaft of the drive mechanism is directly connected to the crushing knife, stable and reliable transmission can be achieved.

[0051] In summary, the utility model increases the torque without increasing the volume, achieving the combination of small volume, large torque, high speed and stable and reliable transmission.

[0052] In this embodiment, the gearbox 12 includes a gearbox housing composed of an upper gearbox cover 122 and a lower gearbox cover 121, and a planetary gear train disposed within the gearbox housing. The brushless motor 11 is provided with an upper motor cover 112. The lower gearbox cover 121 is fixed to the upper motor cover 112. The output shaft of the gearbox sequentially passes through the upper gearbox cover 122 and the top wall of the base housing upward. Among them, the planetary gear train includes a sun gear 123, an internal gear ring 127, and planetary gears 125. The planetary gears 125 are fixed to the gearbox housing through planetary pins 124. The motor shaft 111 is connected to the sun gear 123. The planetary gears 125 are respectively meshed with the sun gear 123 and the internal gear ring 127. The internal gear ring 127 is provided with an output shaft 1273. The main characteristics of the gearbox using a planetary gear train for transmission are small size, large load-bearing capacity, smooth operation, and low noise. It is preferably to adopt an NGW planetary transmission mechanism, with a relatively small overall size and the number of planetary gears between 3 and 6. Moreover, this planetary gear train is different from the conventional planetary bracket output. Since the planetary pins are fixed to the gearbox housing, the planetary gears can only rotate but not revolve, and the output is from the internal gear ring. At this time, the reduction ratio i = Z3 / Z1, where Z3 is the number of teeth of the internal gear ring and Z1 is the number of teeth of the sun gear, and the reduction ratio i = 1:2 - 3, which is relatively small. Therefore, the torque can be increased without increasing the volume too much or decelerating too much. In addition, after the upper gearbox cover and the lower gearbox cover are fixed, they form the gearbox housing. The lower gearbox cover is fixed to the upper motor cover. In this way, the upper gearbox cover, the lower gearbox cover, and the upper motor cover are fixed together, and then the whole is fixed to the base housing. On the one hand, the overall structure is compact, the occupied space can be compressed, which is beneficial to reducing the overall volume of the drive mechanism. On the other hand, it is also convenient for installation.

[0053] It can be understood that other common gearboxes with a small reduction ratio can also be used for replacement.

[0054] It can be understood that the lower gearbox cover and the upper motor cover can also be of an integral structure, so as to further reduce the volume and make the volume of the base smaller, especially the axial height can be reduced a lot.

[0055] Further, a ball bearing 128 is installed on the output shaft 1273. The outer ring of the ball bearing is fixed to the upper gearbox cover 122. An axial limit step 1275 for limiting and cooperating with the lower end face of the inner ring of the ball bearing is provided on the output shaft 1273. A hole limit step 1222 for limiting and cooperating with the lower end face of the outer ring of the ball bearing is provided on the upper gearbox cover to position the installation position of the ball bearing. Through the rolling support of the ball bearing, the smooth rotation of the output shaft is realized.

[0056] To ensure the seal between the output shaft and the upper cover of the gearbox, a shaft seal 129 is installed on the output shaft 1273. The upper cover 112 of the motor is fixed to the base housing 102 by fasteners, generating an upward axial force that axially fixes the shaft seal by the cooperation of the upper cover 122 of the gearbox and the base housing 102. Specifically, the lower cover 121 of the gearbox is fixed to the upper cover 112 of the motor by screws 1211. The upper cover 112 of the motor is fixed to the base housing 102 through fastening screws and screw holes, with an upward axial force pressing against the shaft seal position to play a sealing role. In addition, an installation cavity is provided at the lower part of the base housing 102. Positioning posts 1021 are evenly distributed along the circumference in the middle of the installation cavity. Threaded holes are provided in the positioning posts. Corresponding positioning grooves 1121 that cooperate with the positioning posts are provided on the upper cover of the motor. Through holes are provided on the bottom wall of the positioning grooves. The fastening screws pass through the through holes and are threadedly connected to the threaded holes.

[0057] Furthermore, a stepped shaft hole 1022 with a smaller upper diameter and a larger lower diameter is provided at the center of the upper part of the base housing 102. The output shaft 1273 passes through the stepped shaft hole. A central convex portion 1221 protruding upward is provided at the center of the upper cover 122 of the gearbox. The central convex portion is inserted into the stepped shaft hole 1022. The shaft seal 129 includes an upper axial part 1292 and a lower axial part 1291. The upper axial part 1292 cooperates with the output shaft and the upper side of the stepped shaft hole, and seals the end of the central convex portion 1221 and the ball bearing 128. The lower axial part 1291 cooperates with the central convex portion and the lower side of the stepped shaft hole. In this way, a radial and axial sealing fit is formed between the shaft seal, the stepped shaft hole, and the output shaft, avoiding leakage.

[0058] To ensure the rotation of the internal gear ring, as Figure 11 shown, there is an axial gap H1 between the lower end of the shaft of the internal gear ring 127 and the lower cover 121 of the gearbox. Radial limiting ribs 1274 are provided on the radial outer side of the internal gear ring 127. The radial limiting ribs cooperate with the inner ring of the upper cover of the gearbox to limit the radial runout of the internal gear ring. In this way, the rotational resistance of the output shaft of the internal gear ring is small, and the radial runout during high-speed rotation of the output shaft is reduced.

[0059] Specifically, an upper cover piece 126 is provided above the planetary gear on the inner side of the upper cover 122 of the gearbox. The lower end of the planetary pin 124 is inserted into the pin hole on the lower cover of the gearbox and installed with interference fit. The upper end of the planetary pin 124 is connected to the pin hole on the upper cover piece. Thus, the installation accuracy of the planetary gear is ensured, it is not easy to shift during operation, the operation accuracy is improved, and the operation noise is reduced.

[0060] As Figure 9As shown in the figure, the internal gear ring 127 includes an axial portion 1271 with a gear ring provided on the inner wall, an upper end portion 1272 connected to the upper end of the axial portion, and an output shaft 1273 connected to the upper end portion. The upper end portion 1272 is fixed to the axial portion 1271 by screws, and the output shaft 1273 is press-fitted into the through hole at the center of the upper end portion, so that the output shaft rotates following the internal gear ring 127.

[0061] Specifically, an installation groove 103 is provided in the upper part of the base housing, a threaded joint 21 is provided at the bottom opening of the mixing cup, and internal threads are provided on the inner wall of the installation groove. In this way, the threaded joint 21 is threadedly connected to the installation groove 103, and a sealing ring can be added for sealing. The output shaft and the crushing knife pass through the lower opening of the mixing cup and extend into the interior of the mixing cup. In addition, the mixing cup 2 is provided with a handle 23 that can rotate up and down.

[0062] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A portable food processor, comprising a base, a drive mechanism disposed within the base, a mixing cup disposed on the base, and a crushing knife disposed on the base and driven by the drive mechanism to extend into the mixing cup. The mixing cup has an open lower end and is sealingly connected to the base. The base includes a base housing and a base lower shell mounted at the bottom of the base housing. It is characterized in that, The driving mechanism includes a brushless motor and a gearbox that are integrally fixed along the axial direction. The brushless motor is fixed to the base housing. The input end of the gearbox is connected to the motor shaft of the brushless motor, and the output shaft of the gearbox drives the crushing knife to rotate.

2. A portable food processor according to claim 1, wherein, The gearbox includes a gearbox body composed of a gearbox upper cover and a gearbox lower cover, and a planetary gear train arranged in the gearbox body. The brushless motor is provided with a motor upper cover. The gearbox lower cover is fixed to the motor upper cover. The output shaft of the gearbox sequentially passes through the gearbox upper cover and the top wall of the base housing upward.

3. The portable food processor according to claim 2, wherein, The planetary gear train includes a sun gear, an internal gear ring, and planetary gears. The planetary gears are fixed to the gearbox body through planetary pins. The motor shaft passes through the gearbox lower cover and is connected to the sun gear. The planetary gears are respectively meshed with the sun gear and the internal gear ring, and the internal gear ring is connected to the output shaft.

4. A portable food processor according to claim 2, wherein, A shaft seal is installed on the output shaft. The motor upper cover is fixed to the base housing through fasteners and generates an upward axial force, so that the gearbox upper cover and the base housing cooperate to axially fix the shaft seal.

5. A portable food processor according to claim 4, wherein, A stepped shaft hole with a smaller upper diameter and a larger lower diameter is provided at the upper center of the base housing. The output shaft passes through the stepped shaft hole. A central convex portion protruding upward is provided at the center of the gearbox upper cover. The central convex portion is inserted into the stepped shaft hole. The shaft seal includes an upper axial portion and a lower axial portion. The upper axial portion cooperates with the output shaft and the upper side of the stepped shaft hole, and the lower axial portion cooperates with the central convex portion and the lower side of the stepped shaft hole.

6. A portable food processor according to claim 3, wherein There is an axial gap between the lower end of the axial direction of the internal gear ring and the gearbox lower cover; and / or, radial limiting ribs are provided on the outer side in the radial direction of the internal gear ring, and the radial limiting ribs cooperate with the inner ring of the gearbox upper cover to limit the radial runout of the internal gear ring.

7. A portable food processor according to claim 2, wherein, A ball bearing is installed on the output shaft, and the outer ring of the ball bearing is fixed to the gearbox upper cover.

8. A portable food processor according to claim 7, wherein, An axial limiting step for limiting and cooperating with the lower end face of the inner ring of the ball bearing is provided on the output shaft, and a hole limiting step for limiting and cooperating with the lower end face of the outer ring of the ball bearing is provided on the gearbox upper cover.

9. A portable food processor according to claim 3, characterized in that, Upper cover pieces are provided on the inner side of the gearbox upper cover above the planetary gears. The lower end of the planetary pin is inserted into the pin hole on the gearbox lower cover and installed with interference fit, and the upper end of the planetary pin is connected to the pin hole on the upper cover piece; and / or, the internal gear ring includes an axial portion with a tooth ring arranged on the inner wall and an upper end portion connected to the upper end of the axial portion, and the output shaft is connected to the upper end portion.

10. A portable food processor according to claim 1, wherein, A battery is provided below the brushless motor, and a driving circuit is connected between the battery and the brushless motor.

Images