Food processor stable in transmission

Abstract

The utility model discloses a food processor with stable transmission, which relates to the field of life electric appliances and comprises a main machine, a cup body and a reciprocating motion mechanism, and a stirring piece in transmission connection with an output shaft of the reciprocating motion mechanism is arranged in the cup body. The reciprocating motion mechanism comprises a first gear arranged on the outer side of the output shaft in a sleeving mode and a second gear located below the first gear, and the first gear and the second gear have a rotating speed difference so that the output shaft can be driven to rotate while reciprocating in the axial direction of the output shaft. The first gear comprises a gear body and an upper extending part which extends upwards from the gear body and surrounds the outer side of the output shaft, and the outer side of the upper extending part is further sleeved with a first bearing, so that the stability of the overall position of the first gear can be improved by means of positioning cooperation of the first bearing and the upper extending part, and reliable positioning of the first gear is achieved; and the situation that the output shaft drives the first gear to swing after being stressed, so that the first gear and the second gear collide and rub to generate large noise and are seriously abraded is effectively avoided.

Description

[0001] This application claims the priority of Chinese patent application 2023112960896, filed on September 28, 2023, and cites the full text of the above-mentioned Chinese patent application. Technical Field

[0002] The utility model relates to the technical field of household electrical appliances, in particular to a food processing machine with stable transmission. Background Art

[0003] The existing food processor includes a cup body with a crushing chamber, a crushing device arranged in the crushing chamber, and a motor located under the cup body and driving the crushing device to rotate. When using the food processor, the user places the food into the crushing chamber, and the crushing device rotates at high speed driven by the motor to process the food. However, the existing food processors, especially meat grinders, generally have poor crushing performance when cutting food, especially when crushing vegetable leaves. Since the vegetable leaves are light, some of the vegetable leaves will adhere to the side or bottom of the cup body during the crushing process, and the crushing device is fixed in a horizontal position for rotation and cutting, and the vegetable leaves attached to the wall cannot be crushed, resulting in insufficient processing of the food. In order to solve the above problems, for example, Chinese utility model patent CN201720870853.X discloses an automatically lifting and rotating cutting stirring knife, which installs a crushing device on the upper end of the output shaft, and a rotatable center rod is installed at the bottom of the output shaft, the output shaft and the center rod are radially fixed and axially movable; a convex pin is radially arranged at the bottom of the output shaft, and the outer movable sleeve of the center rod is provided with a rotatable sliding sleeve, and an inclined spiral sliding groove is arranged on the inner surface of the sliding sleeve, and the convex pin is movably embedded in the spiral sliding groove; the center rod drives the output shaft to rotate at a first speed, and the sliding sleeve rotates at a second speed. When there is a speed difference between the first speed and the second speed, the output shaft can rotate relative to the sliding sleeve, and the convex pin will move along the trajectory of the spiral sliding groove, driving the crushing device to rotate while cyclically lifting and lowering up and down, so that the crushing device moves up and down to achieve a larger range of cutting in the axial direction, so that the crushing device moves up and down to achieve a larger range of cutting in the axial direction. However, in the above scheme, only a bearing is provided on the outer side of the center rod to realize the radial positioning of the output shaft, and the two gears are limited only by upper and lower gaskets. However, there is a certain gap between the two gears so that they can rotate relative to each other and output different speeds. This causes the two gears to have a large deflection when the output shaft is subjected to a large radial force, causing the two gears to collide with each other, generate a large noise and cause serious wear, which seriously shortens the service life of the gears. Utility Model Content

[0004] The utility model aims to provide a food processing machine with stable transmission, so as to solve the problem that in the existing food processing machine, only one bearing is provided to position the center rod, which leads to the gear being easily driven to have a large deflection when the output shaft is subjected to force, thus causing gear damage.

[0005] To achieve the above-mentioned purpose, the utility model provides a food processing machine with stable transmission, including a main unit with a built-in motor and a detachable cup body connected to the main unit, a reciprocating motion mechanism connected to the motor transmission is also provided in the main unit, a stirring member connected to the output shaft of the reciprocating motion mechanism transmission is provided in the cup body, the reciprocating motion mechanism includes a first gear sleeved on the outside of the output shaft and a second gear located below the first gear, the first gear and the second gear are respectively matched with the output shaft transmission, the first gear and the second gear have a speed difference, so that the output shaft can be driven to reciprocate along its axial direction while rotating, the first gear includes a gear body and an upper extension portion extending upward from the gear body and surrounding the outside of the output shaft, and a first bearing is also sleeved on the outside of the upper extension portion.

[0006] The present application sets up a reciprocating motion mechanism to drive the output shaft to rotate and reciprocate along its axial direction at the same time, so that the stirring element driven by the output shaft can achieve a larger range of stirring in the axial direction, effectively avoiding the situation where the stirring element cannot cut the food due to the food being far away from the stirring element in the axial direction, resulting in insufficient processing of the food, which helps to improve the processing effect and efficiency of the food and enhance the user experience.

[0007] At the same time, the first gear includes a gear body and an upper extension portion extending upward from the gear body and surrounding the outside of the output shaft, and a first bearing is also sleeved on the outside of the upper extension portion, so that the first gear can improve the stability of its overall position with the help of the positioning cooperation of the first bearing and the upper extension portion, and realize the reliable positioning of the first gear, effectively avoiding the situation where the output shaft drives the first gear to swing after being subjected to force, causing the first gear and the second gear to collide and rub, causing both to produce loud noise and serious wear, which helps to improve the protection of the first gear and the second gear, avoid the situation where the first gear and the second gear fail to drive due to serious wear, extend the service life of both, and improve the user experience. At the same time, it effectively avoids the situation where the radial deflection of the output shaft when subjected to a large force causes the stirring effect of the stirring element to deteriorate or even collides with the inner wall of the cup body, causing the stirring element to be damaged, and improves the stability of the whole machine.

[0008] In a preferred implementation of a food processor with stable transmission, the upper extension portion includes a first step portion with a step surface facing upward and connected to the gear body, and a first rib extending upward from the step surface of the first step portion and surrounding the outside of the output shaft, and the first bearing sleeve is arranged on the outside of the side wall of the first step portion.

[0009] By setting the upper extension portion to include a first step portion with a step surface facing upward and connected to the gear body, and a first rib extending upward from the step surface of the first step portion and surrounding the outside of the output shaft, and the first bearing is sleeved on the outside of the side wall of the first step portion, so that the first bearing can achieve positioning of the side wall of the first step portion, and then achieve radial positioning of the entire first gear, further improving the stability of the position of the first gear. At the same time, the first rib is surrounded on the outside of the output shaft, so that the first gear can be matched with the output shaft through the first rib, which can not only increase the matching area of ​​the first gear and the output shaft, so that the radial positioning of the first gear to the output shaft is more stable, avoid the situation that the output shaft is deflected when the output shaft is subjected to force, and further improve the rotation stability of the output shaft; at the same time, it can also increase the transmission area, improve the transmission stability of the two, ensure the transmission of the torque from the first gear to the output shaft, and avoid the situation that the first gear or the output shaft is seriously worn or even broken when the transmission torque is large.

[0010] In a preferred implementation of a food processing machine with stable transmission, a transmission member for transmission-connecting the first rib and the output shaft is provided between the first rib and the output shaft.

[0011] By providing a transmission member between the first rib and the output shaft to connect the first rib and the output shaft, the torque output by the first gear can be transmitted to the transmission member and then transmitted to the output shaft by the transmission member, thereby effectively avoiding the situation where the first gear and the output shaft directly contact and transmit torque, resulting in severe wear or even breakage of the first gear or the output shaft when the transmitted torque is large, further improving the protection of the first gear and the output shaft, helping to extend their service life and ensure transmission stability. At the same time, after long-term use, if the transmission member is severely worn, the transmission stability can be ensured by replacing the transmission member, effectively reducing maintenance costs and improving user experience.

[0012] In a preferred implementation of a food processing machine with stable transmission, the outer side wall of the transmission member is provided with a rotation-stopping rib extending vertically, and the inner side wall of the first rib is provided with a rotation-stopping groove cooperating with the rotation-stopping rib; or,

[0013] The transmission member and the first rib are integrally injection molded.

[0014] By providing a vertically extending anti-rotation rib on the outer side wall of the transmission part, and providing a anti-rotation groove that cooperates with the anti-rotation rib on the inner side wall of the first rib, the transmission part can achieve torque transmission between the two through the anti-rotation cooperation of the anti-rotation rib and the anti-rotation groove, thereby ensuring the stability of torque transmission, effectively avoiding relative sliding between the transmission part and the first rib, resulting in torque transmission failure and thus causing the output shaft to be unable to rotate, thereby ensuring the stability of torque transmission and improving the reliability of the whole machine.

[0015] By arranging the transmission part and the first rib to be integrally injection molded, the step of connecting the transmission part to the first rib is omitted, which helps to improve assembly efficiency. At the same time, the stability of the connection between the transmission part and the first rib is ensured, the reliability of torque transmission between the two is improved, and the normal operation of the whole machine is further ensured.

[0016] In a preferred implementation of a food processing machine with stable transmission, the second gear is provided with a lower extension portion extending downward and surrounding the outer side of the output shaft, and a second bearing is also sleeved on the outer side of the lower extension portion.

[0017] By providing the second gear with a lower extension portion extending downward and surrounding the outside of the output shaft, and a second bearing being sleeved on the outside of the lower extension portion, the second gear can improve the stability of its overall position with the help of the positioning cooperation of the second bearing and the lower extension portion, thereby achieving reliable positioning of the second gear, and effectively avoiding the situation where the output shaft drives the second gear to swing after being subjected to force, causing the first gear and the second gear to collide and rub, causing both to generate loud noise and severe wear, which helps to further enhance the protection of the first gear and the second gear, avoid the situation where the first gear and the second gear transmission fail due to severe wear of the two, extend the service life of both, and enhance the user experience.

[0018] In a preferred implementation of a food processor with stable transmission, the reciprocating motion mechanism also includes a housing covering the first gear and the second gear, the housing is formed with a second step portion, the step surface of the second step portion is provided with a positioning rib extending upward for supporting the second bearing, and the positioning rib is located on the outer side of the lower extension portion.

[0019] By forming a second step portion on the housing, axial support for the second bearing is achieved, the reliability of the second bearing position is ensured, and the second bearing position is prevented from moving and failing to effectively limit the second gear. At the same time, the step surface of the second step portion is provided with a positioning rib extending upward, and the positioning rib is located on the outside of the lower extension portion, so that the positioning rib can further limit the lower extension portion, so that the lower extension portion can be radially positioned with the help of the second bearing and the positioning rib, further improving the reliability of the second gear position.

[0020] In a preferred implementation of a food processor with stable transmission, the second step portion includes a first step and a second step located below the first step, the positioning rib is formed on the second step, and the first step is supported below the second gear.

[0021] By setting the second step portion to include a first step and a second step located below the first step, the positioning rib is formed on the second step, and the first step is supported below the second gear, so that the first step can support the second gear, and the second step can support the second bearing, thereby realizing layered support for the two components, avoiding the situation where both components fall on the same step surface, resulting in greater force on the second step portion and easy deformation of the shell, thereby ensuring the supporting effect of the shell on the second gear and the second bearing.

[0022] In a preferred implementation of a food processing machine with stable transmission, a spiral guide rail extending in a circumferential direction and connected end to end is provided on the outer surface of the output shaft, and a protrusion cooperating with the spiral guide rail is provided on the lower extension portion.

[0023] A spiral guide rail extending circumferentially and connected end to end is provided on the outer surface of the output shaft, and a protrusion cooperating with the spiral guide rail is provided on the lower extension part. By virtue of the speed difference between the first gear and the second gear, when the first gear drives the output shaft to rotate, the output shaft and the lower extension part produce relative rotation, thereby causing the protrusion to move along the spiral guide rail. Since the second gear is fixed and stationary in the axial direction, the output shaft will produce axial reciprocating motion due to the relative force between the protrusion and the spiral guide rail, thereby causing the output shaft to reciprocate axially while rotating, thereby allowing the stirring element driven by the output shaft to achieve a wider range of stirring in the axial direction, thereby improving the stirring effect.

[0024] In a preferred implementation of a food processing machine with stable transmission, the reciprocating motion mechanism also includes a housing covering the first gear and the second gear, the housing is formed with a third step portion adapted to the upper extension portion, and the step surface of the third step portion is provided with a second rib extending upward and surrounding the outside of the output shaft.

[0025] By forming a third step portion adapted to the upper extension portion on the housing, the first bearing and the upper extension portion are positioned, the reliability of the positions of the two is ensured, and the rotation stability of the first gear and the output shaft is ensured. At the same time, the step surface of the third step portion is provided with a second rib extending upward and surrounding the outside of the output shaft, so that the housing can achieve radial positioning of the output shaft with the help of the second rib, so that the output shaft can not only be positioned through the first gear and the second gear, but the second rib can also further play a positioning role, effectively avoiding the situation where the output shaft has a large radial swing. At the same time, the contact area between the second rib and the output shaft is large, so that a large supporting force can be provided to ensure the positioning effect of the output shaft.

[0026] In a preferred implementation of a food processing machine with stable transmission, a third bearing is further provided between the second rib and the output shaft.

[0027] By providing a third bearing between the second rib and the output shaft, the sliding friction between the second rib and the output shaft is converted into rolling friction through the third bearing, which helps to reduce the friction between the two and improve the smoothness of the output shaft rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0029] Figure 1 A cross-sectional view of a reciprocating motion structure and a motor in one embodiment of the utility model;

[0030] Figure 2 A cross-sectional view of a reciprocating motion structure in one embodiment of the utility model;

[0031] Figure 3 This is a schematic structural diagram of a first gear and a transmission member in one embodiment of the utility model.

[0032] List of parts and reference numerals:

[0033] 1-output shaft, 11-helical guide rail; 2-first gear, 21-gear body, 22-upper extension, 221-first step, 222-first rib, 2221-anti-rotation groove; 3-second gear, 31-lower extension, 311-protrusion; 4-motor; 5-housing, 51-second step, 511-positioning rib, 52-third step, 521-second rib; 6-first bearing; 7-second bearing; 8-third bearing; 9-transmission member, 91-anti-rotation rib. DETAILED DESCRIPTION

[0034] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in combination with the accompanying drawings by way of examples.

[0035] It should be noted that many specific details are elaborated in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific implementation methods disclosed below.

[0036] like Figures 1 to 3As shown, the utility model provides a food processing machine with stable transmission, including a main machine with a built-in motor 4 and a detachable cup body connected to the main machine, a reciprocating mechanism connected to the motor 4 is also provided in the main machine, a stirring member connected to the output shaft 1 of the reciprocating mechanism is provided in the cup body, the reciprocating mechanism includes a first gear 2 sleeved on the outside of the output shaft 1 and a second gear 3 located below the first gear 2, the first gear 2 and the second gear 3 are respectively matched with the output shaft 1, the first gear 2 and the second gear 3 have a speed difference, so that the output shaft 1 can be driven to reciprocate along its axial direction while being driven to rotate, the first gear 2 includes a gear body 21 and an upper extension part 22 extending upward from the gear body 21 and surrounding the outside of the output shaft 1, and a first bearing 6 is also sleeved on the outside of the upper extension part 22.

[0037] The present application sets up a reciprocating motion mechanism to drive the output shaft 1 to rotate and reciprocate along its axial direction at the same time, so that the stirring element driven by the output shaft 1 can achieve a larger range of stirring in the axial direction, effectively avoiding the situation where the stirring element cannot cut the food due to the food being far away from the stirring element in the axial direction, resulting in insufficient food processing, which helps to improve the processing effect and efficiency of the food and enhance the user experience.

[0038] At the same time, the first gear 2 includes a gear body 21 and an upper extension portion 22 extending upward from the gear body 21 and surrounding the outside of the output shaft 1, and the upper extension portion 22 is also sleeved with a first bearing 6, so that the first gear 2 can improve the stability of its overall position with the help of the positioning cooperation of the first bearing 6 and the upper extension portion 22, and realize the reliable positioning of the first gear 2, effectively avoiding the situation that the output shaft 1 drives the first gear 2 to swing after being subjected to force, causing the first gear 2 and the second gear 3 to collide and rub, causing both to produce loud noise and serious wear, which helps to improve the protection of the first gear 2 and the second gear 3, avoid the situation that the first gear 2 and the second gear 3 fail to drive due to serious wear, extend the service life of both, and improve the user experience. At the same time, it effectively avoids the situation that the radial deflection of the output shaft 1 when subjected to a large force causes the stirring effect of the stirring element to deteriorate or even collides with the inner wall of the cup body to cause damage to the stirring element, and improves the stability of the whole machine.

[0039] It should be noted that the present application does not specifically limit the structure of the upper extension portion 22. As a preferred embodiment of the present application, Figure 2 As shown, the upper extension portion 22 includes a first step portion 221 with a step surface facing upward and connected to the gear body 21, and a first rib 222 extending upward from the step surface of the first step portion 221 and surrounding the outside of the output shaft 1, and the first bearing 6 is sleeved on the outside of the side wall of the first step portion 221.

[0040] By setting the upper extension portion 22 to include a first step portion 221 with a step surface facing upward and connected to the gear body 21, and a first rib 222 extending upward from the step surface of the first step portion 221 and surrounding the outside of the output shaft 1, and the first bearing 6 is sleeved on the outside of the side wall of the first step portion 221, so that the first bearing 6 can achieve positioning of the side wall of the first step portion 221, and then achieve radial positioning of the entire first gear 2, further improving the stability of the position of the first gear 2. At the same time, the first rib 222 is surrounded by the outside of the output shaft 1, so that the first gear 2 can be matched with the output shaft 1 through the first rib 222, which can not only increase the matching area of ​​the first gear 2 and the output shaft 1, so that the radial positioning of the first gear 2 to the output shaft 1 is more stable, avoid the output shaft 1 when the force is applied, and further improve the rotation stability of the output shaft 1; at the same time, it can also increase the transmission area, improve the transmission stability of the two, ensure the transmission of torque from the first gear 2 to the output shaft 1, and avoid the first gear 2 or the output shaft 1 when the transmission torque is large. Wear or even breakage.

[0041] Furthermore, if Figure 2 , Figure 3 As shown, a transmission member 9 is provided between the first rib 222 and the output shaft 1 to transmission-connect the first rib 222 and the output shaft 1 .

[0042] By providing a transmission member 9 between the first rib 222 and the output shaft 1 to connect the first rib 222 and the output shaft 1, the torque output by the first gear 2 can be transmitted to the transmission member 9 and then transmitted to the output shaft 1 by the transmission member 9, thereby effectively avoiding the first gear 2 and the output shaft 1 directly contacting and transmitting the torque, resulting in greater wear or even breakage of the first gear 2 or the output shaft 1 when the transmitted torque is large, further improving the protection of the first gear 2 and the output shaft 1, helping to extend their service life and ensure transmission stability. At the same time, after long-term use, if the transmission member 9 is severely worn, the transmission stability can be ensured by replacing the transmission member 9, effectively reducing the maintenance cost and improving the user experience.

[0043] It should be noted that the present application does not specifically limit how the transmission member 9, the output shaft 1, and the first rib 222 are connected to each other. Specifically, Figure 2 , Figure 3 As shown, a flat groove is provided at the center of the transmission member 9, and a flat position matching the flat groove is provided on the output shaft 1 to realize the transmission connection between the two. At the same time, the transmission member is inserted into the groove formed by the first rib 222 by interference fit. More preferably, the outer wall of the transmission member 9 is provided with a vertically extending anti-rotation rib 91, and the inner wall of the first rib 222 is provided with an anti-rotation groove 2221 that cooperates with the anti-rotation rib 91 to prevent rotation.

[0044] By providing a vertically extending anti-rotation rib 91 on the outer wall of the transmission member 9, and providing a anti-rotation groove 2221 that cooperates with the anti-rotation rib 91 on the inner wall of the first rib 222, the transmission member 9 can achieve torque transmission between the two through the anti-rotation cooperation between the anti-rotation rib 91 and the anti-rotation groove 2221, thereby ensuring the stability of torque transmission, effectively avoiding relative sliding between the transmission member 9 and the first rib 222, resulting in torque transmission failure and thus causing the output shaft 1 to be unable to rotate, thereby ensuring the stability of torque transmission and improving the reliability of the entire machine.

[0045] Of course, the transmission member 9 and the first rib 222 are not limited to the above-mentioned configuration, and the transmission member 9 and the first rib 222 may also be integrally injection molded.

[0046] By arranging the transmission member 9 and the first rib 222 to be integrally injection molded, the step of connecting the transmission member to the first rib 222 is eliminated, which helps to improve assembly efficiency. At the same time, the stability of the connection between the transmission member 9 and the first rib 222 is ensured, the reliability of torque transmission between the two is improved, and the normal operation of the whole machine is further ensured.

[0047] As a preferred embodiment of the present application, Figure 2 As shown, the second gear 3 is provided with a lower extension portion 31 extending downward and surrounding the outer side of the output shaft 1 , and a second bearing 7 is sleeved on the outer side of the lower extension portion 31 .

[0048] By providing the second gear 3 with a lower extension portion 31 extending downward and surrounding the outside of the output shaft 1, and the second bearing 7 is also sleeved on the outside of the lower extension portion 31, the second gear 3 can improve the stability of its overall position with the help of the positioning cooperation of the second bearing 7 and the lower extension portion 31, thereby realizing reliable positioning of the second gear 3, effectively avoiding the situation where the output shaft 1 drives the second gear 3 to swing after being subjected to force, causing the first gear 2 and the second gear 3 to collide and rub, causing both to generate loud noise and serious wear, which helps to further improve the protection of the first gear 2 and the second gear 3, avoid the situation where the first gear 2 and the second gear 3 fail to transmit due to serious wear, extend the service life of both, and improve the user experience.

[0049] Furthermore, if Figure 2 As shown, the reciprocating motion mechanism also includes a housing 5 covering the first gear 2 and the second gear 3, the housing 5 is formed with a second step portion 51, the step surface of the second step portion 51 is provided with a positioning rib 511 extending upward for supporting the second bearing 7, and the positioning rib 511 is located on the outer side of the lower extension portion 31.

[0050] By forming the second step portion 51 on the housing 5, the axial support for the second bearing 7 is achieved, the reliability of the position of the second bearing 7 is ensured, and the movement of the second bearing 7 is avoided so that it cannot effectively limit the second gear 3. At the same time, the step surface of the second step portion 51 is provided with a positioning rib 511 extending upward, and the positioning rib 511 is located on the outside of the lower extension portion 31, so that the positioning rib 511 can further limit the lower extension portion 31, so that the lower extension portion 31 can be radially positioned with the help of the second bearing 7 and the positioning rib 511, further improving the reliability of the position of the second gear 3.

[0051] Furthermore, if Figure 2 As shown, the second step portion 51 includes a first step and a second step located below the first step, the positioning rib 511 is formed on the second step, and the first step is supported below the second gear 3.

[0052] By setting the second step portion 51 to include a first step and a second step located below the first step, the positioning rib 511 is formed on the second step, and the first step is supported below the second gear 3, so that the first step can support the second gear 3, and the second step can support the second bearing 7, thereby realizing layered support for the two components, avoiding the situation where both components fall on the same step surface, resulting in the second step portion being subjected to greater force and the outer shell being easily deformed, thereby ensuring the supporting effect of the outer shell 3 on the second gear 3 and the second bearing 7.

[0053] As a preferred embodiment of this embodiment, Figure 2 As shown, a spiral guide rail 11 extending circumferentially and connected end to end is provided on the outer surface of the output shaft 1, and a lower extension portion 31 is provided with a protrusion 311 cooperating with the spiral guide rail 11. Specifically, the spiral guide rail 11 is arranged obliquely, and while the first gear 2 drives the output shaft 1 to rotate, the second gear 3 rotates and drives the protrusion 311 to move along the spiral guide rail 11, so that the output shaft 1 reciprocates along its axial direction.

[0054] A spiral guide rail 11 extending circumferentially and connected end to end is provided on the outer surface of the output shaft 1, and the spiral guide rail 11 is inclined. The lower extension portion 31 is provided with a protrusion 311 cooperating with the spiral guide rail 11. By virtue of the speed difference between the first gear 2 and the second gear 3, when the first gear 2 drives the output shaft 1 to rotate, the output shaft 1 and the lower extension portion 31 produce relative rotation, thereby causing the protrusion 311 to move along the spiral guide rail 11. Since the second gear 3 is fixed and stationary in the axial direction, the output shaft 1 will produce axial reciprocating motion due to the relative force between the protrusion 311 and the spiral guide rail 11, thereby causing the output shaft 1 to reciprocate axially while rotating, thereby allowing the stirring element driven by the output shaft 1 to achieve a wider range of stirring in the axial direction, thereby improving the stirring effect.

[0055] It should be noted that the present application does not specifically limit the structure of the protrusion 311. As a preferred embodiment of the present application, Figure 2 As shown, the lower extension portion 31 is provided with a fixing hole, and the protrusion 311 includes a ball disposed between the fixing hole and the spiral guide rail 11 .

[0056] By providing a fixing hole in the lower extension portion 31, and the protrusion 311 including a ball disposed between the fixing hole and the spiral guide rail 11, the sliding friction between the spiral guide rail 11 and the protrusion 311 is transformed into rolling friction due to the characteristics of the ball, effectively reducing the friction resistance between the two, making the reciprocating motion of the output shaft 1 smoother, while reducing the kinetic energy loss during the transmission process, and further improving the transmission efficiency. Of course, the protrusion 311 can also be a structure such as a latch, which will not be described in detail here.

[0057] As a preferred embodiment of the present application, Figure 2 As shown, the reciprocating mechanism also includes a housing 5 covering the first gear 2 and the second gear 3, the housing 5 is formed with a third step portion 52 adapted to the upper extension portion 22, and the step surface of the third step portion 52 is provided with a second rib 521 extending upward and surrounding the outside of the output shaft 1.

[0058] By forming a third step portion 52 adapted to the upper extension portion 22 on the housing 5, the first bearing 6 and the upper extension portion 22 are positioned, the reliability of the positions of the two is ensured, and the rotation stability of the first gear 2 and the output shaft 1 is ensured. At the same time, the step surface of the third step portion 52 is provided with a second rib 521 extending upward and surrounding the outside of the output shaft 1, so that the housing 5 can achieve radial positioning of the output shaft 1 with the help of the second rib 521, so that the output shaft 1 can not only be positioned through the first gear 2 and the second gear 3, but the second rib 521 can also further play a positioning role, effectively avoiding the situation where the output shaft 1 has a large radial swing. At the same time, the contact area between the second rib 521 and the output shaft 1 is large, so that it can provide a large supporting force and ensure the positioning effect of the output shaft 1.

[0059] Furthermore, if Figure 2 As shown, a third bearing 8 is further provided between the second rib 521 and the output shaft 1 .

[0060] By providing a third bearing 8 between the second rib 521 and the output shaft 1 , the sliding friction between the second rib 521 and the output shaft 1 is converted into rolling friction through the third bearing 8 , which helps to reduce the friction between the two and improve the smoothness of the rotation of the output shaft 1 .

[0061] The technical solution protected by the present utility model is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any embodiment with the technical solution of one or more other embodiments is within the protection scope of the present utility model. Although the present utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present utility model. Therefore, these modifications or improvements made without departing from the spirit of the present utility model are within the scope of protection claimed by the present utility model.

Claims

1. A food processing machine with stable transmission, comprising a main machine with a built-in motor and a detachable cup body connected to the main machine, wherein a reciprocating mechanism connected to the motor is provided in the main machine, and a stirring member connected to the output shaft of the reciprocating mechanism is provided in the cup body, characterized in that: The reciprocating motion mechanism includes a first gear sleeved on the outside of the output shaft and a second gear located below the first gear. The first gear and the second gear are respectively matched with the output shaft for transmission. The first gear and the second gear have a speed difference so that the output shaft can be driven to reciprocate along its axial direction while rotating. The first gear includes a gear body and an upper extension portion extending upward from the gear body and surrounding the outside of the output shaft. A first bearing is also sleeved on the outside of the upper extension portion.

2. A food processing machine with stable transmission according to claim 1, characterized in that: The upper extension portion includes a first step portion with a step surface facing upward and connected to the gear body, and a first rib extending upward from the step surface of the first step portion and surrounding the outside of the output shaft. The first bearing sleeve is arranged on the outside of the side wall of the first step portion.

3. A food processing machine with stable transmission according to claim 2, characterized in that: A transmission member is also provided between the first rib and the output shaft to transmission-connect the first rib and the output shaft.

4. A food processing machine with stable transmission according to claim 3, characterized in that: The outer side wall of the transmission member is provided with a rotation-stopping rib extending vertically, and the inner side wall of the first rib is provided with a rotation-stopping groove cooperating with the rotation-stopping rib; or, The transmission member and the first rib are integrally injection molded.

5. A food processing machine with stable transmission according to claim 1, characterized in that: The second gear is provided with a lower extension portion extending downward and surrounding the outer side of the output shaft, and a second bearing is sleeved on the outer side of the lower extension portion.

6. A food processing machine with stable transmission according to claim 5, characterized in that: The reciprocating motion mechanism also includes a housing covering the first gear and the second gear, the housing forming a second step portion, the step surface of the second step portion is provided with a positioning rib extending upward for supporting the second bearing, and the positioning rib is located on the outer side of the lower extension portion.

7. A food processing machine with stable transmission according to claim 6, characterized in that: The second step portion includes a first step and a second step located below the first step, the positioning rib is formed on the second step, and the first step is supported below the second gear.

8. The food processing machine with stable transmission according to claim 5, characterized in that: A spiral guide rail extending in the circumferential direction and connected end to end is arranged on the outer surface of the output shaft, and a protrusion matching with the spiral guide rail is arranged on the lower extension part.

9. A food processing machine with stable transmission according to claim 1, characterized in that: The reciprocating mechanism also includes a housing covering the first gear and the second gear, the housing is formed with a third step portion adapted to the upper extension portion, and the step surface of the third step portion is provided with a second rib extending upward and surrounding the outside of the output shaft.

10. A food processing machine with stable transmission according to claim 9, characterized in that: A third bearing is also provided between the second rib and the output shaft.

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