Food processor reliable in positioning

Abstract

The utility model discloses a food processor reliable in positioning, which relates to the field of life electric appliances and comprises a main machine with a built-in motor and a processing component detachably arranged above the main machine, the processing component is provided with a processing part in transmission connection with a motor shaft of the motor, and the processing part is in transmission connection with the motor shaft through a transmission part. The side, away from the machining part, of the transmission part is movably arranged on the outer side of the motor shaft in a sleeving mode, a positioning shaft arranged in the axial direction of the motor shaft is further arranged in the transmission part, one end of the positioning shaft is movably inserted into the motor shaft, and the other end of the positioning shaft is movably inserted into the transmission part. The positioning range of the positioning shaft on the transmission part in the radial direction is expanded, then the positioning effect on the transmission part can be further improved, the situation that due to unstable positioning of the transmission part and the motor shaft, the transmission part deflects, a machined part deflects, and food materials cannot be continuously processed is further avoided, and the food material processing stability can be improved.

Description

Technical Field

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

[0002] Existing food processors, such as juicers, typically include a main unit with a built-in motor and a removable processing assembly located above the main unit. The processing assembly includes a processing part that is transmission-connected to the motor shaft of the motor. When using the food processor, the user places food ingredients in the processing chamber, and the motor drives the processing part to rotate to process the food ingredients. However, when the processing part engages with the motor shaft, the two will vibrate and collide. In particular, the screw in the juicer will produce significant axial movement when squeezing fruits and vegetables. Therefore, the traditional method of directly connecting the processing part to the motor shaft through a connector cannot meet processing requirements. Some manufacturers will install a transmission member between the processing part and the motor shaft. The side of the transmission member away from the processing part is movably mounted on the outside of the motor shaft. A spring is installed between the transmission member and the motor shaft. When the processing part moves axially back and forth, the transmission member drives the axial movement of the transmission member. Under the action of the upward elastic force of the spring, the transmission member can always engage with the processing part to ensure torque transmission, thereby reducing the noise generated by direct collision between the processing part and the motor shaft. However, in actual use of this type of machine, due to the poor positioning effect of the motor shaft on the transmission part, especially when the transmission part moves upward, the transmission part will tilt relative to the motor shaft, which will cause the workpiece to tilt and cause the workpiece to rotate and wobble.

[0003] In order to solve the above problems, Chinese utility model patent CN217937867U discloses a juicer, which is provided with a spring insertion shaft. The spring insertion shaft passes through the drive transmission part (transmission part) and is threadedly connected to the drive shaft (motor shaft). The transmission part is further radially limited by the auxiliary positioning of the spring insertion shaft. However, users found in actual use that although the spring insertion shaft can play a certain auxiliary positioning role, when the transmission part moves to a higher position, the spring insertion shaft and the transmission part only have a small limited matching area. When the processing part is subjected to a large extrusion force, especially when the processing part is a screw, a large radial force will be generated when squeezing the fruits and vegetables, thereby causing the transmission part to tilt radially. At this time, the spring insertion shaft cannot achieve positioning of the transmission part, causing the food to be blocked between the screw and the cavity wall of the processing cavity, resulting in interruption of food processing, which seriously affects the consumer's experience. Utility Model Content

[0004] The purpose of the utility model is to provide a food processing machine with reliable positioning, so as to solve the problem in existing food processing machines that the spring insertion shaft for positioning the processing part connected between the motor shaft and the processing part has poor positioning effect, which makes the transmission part prone to deflection and causes interruption of food processing.

[0005] To achieve the above-mentioned purpose, the utility model provides a food processing machine with reliable positioning, including a main body with a built-in motor and a detachable processing assembly arranged above the main body, the processing assembly is provided with a processing part that is transmission-connected to the motor shaft of the motor, and the processing part and the motor shaft are transmission-connected via a transmission part, and the side of the transmission part away from the processing part is movably sleeved on the outside of the motor shaft, and a positioning shaft arranged along the axial direction of the motor shaft is also provided in the transmission part, one end of the positioning shaft is movably inserted in the motor shaft, and the other end is movably inserted in the transmission part.

[0006] The present application sets a transmission member between the processing member and the motor shaft to realize the transmission of the motor axial torque to the processing member through the transmission member, and the transmission member is movably sleeved on the outside of the motor shaft on the side away from the processing member, so that when the processing assembly is installed on the main machine, the connecting head at the bottom end of the processing member can press the transmission member downward and drive it to move downward. The transmission member can always abut against the connecting head with the help of the upward elastic force, thereby ensuring the stability of the engagement between the transmission member and the connecting head, and then ensuring the stability of the transmission between the two. The axial vibration generated by the processing member during the processing of food can also be offset by the reciprocating motion of the transmission member, thereby avoiding the situation where the vibration of the processing member collides with the motor shaft when the processing member is directly transmitted to the motor shaft to generate a large noise, which helps to achieve sound insulation and noise reduction.

[0007] At the same time, a positioning shaft arranged along the axial direction of the motor shaft is further provided in the transmission member, one end of the positioning shaft is movably inserted in the motor shaft, and the other end is movably inserted in the transmission member. With the help of the positioning shaft, the limitation of the transmission member and the motor shaft is not limited to the cooperation between the two. At the same time, the lower part of the positioning shaft can be positioned with the motor shaft, and the upper part is positioned with the transmission member, so as to realize the radial limitation of the positioning shaft on the transmission member, ensure the coaxiality of the transmission member and the motor shaft, and effectively avoid the deflection of the transmission member during the torque transmission process, which causes the processing member to deflect and cause unstable food processing and generate large processing noise, thereby improving the stability of torque transmission, and the positioning shaft is not only relative to the transmission member The moving part can move axially and can also move axially relative to the motor shaft. Compared with the existing positioning shaft fixed on the motor shaft, not only the transmission part can realize axial movement, but the positioning shaft can also move accordingly, which expands the radial positioning range of the positioning shaft on the transmission part, thereby further improving the positioning effect of the transmission part, further avoiding the unstable positioning of the transmission part and the motor shaft, resulting in its deflection and then the deflection of the processing part, especially when the processing part deflects during juicing, causing fruit residue to be blocked between the screw and the inner wall of the processing chamber, thereby making it impossible to continue processing the food, which helps to improve the stability of food processing.

[0008] In a preferred implementation of a food processor with reliable positioning, the transmission member is provided with a transmission cavity open toward one side of the motor shaft, the motor shaft extends into the transmission cavity to form a closed cavity, and the positioning shaft is movably arranged in the closed cavity.

[0009] By providing the transmission member with a transmission cavity that is open toward one side of the motor shaft, and the motor shaft extending into the transmission cavity to form a closed cavity, the positioning shaft is movably arranged in the closed cavity to achieve the closure of the cavity inside the transmission member. Compared with the existing method of providing a through hole on the top of the transmission member for the positioning shaft to pass through, it effectively avoids the situation in which slurry and the like enter the closed cavity through the gap between the positioning shaft and the through hole during food processing, causing the residual food inside the cavity to produce odor or even mold, ensuring the cleanliness of the transmission member, and can avoid the situation in which food and the like enter the closed cavity, causing friction with the positioning shaft during movement, generating noise and jamming of the movement, ensuring the smoothness of the positioning shaft movement, and thereby improving its positioning effect on the transmission member.

[0010] In a preferred implementation of a food processor with reliable positioning, the motor shaft is provided with a first positioning hole connected to the closed cavity and extending axially downward, the top wall of the closed cavity is provided with a second positioning hole extending axially upward, one end of the positioning shaft is movably inserted in the first positioning hole, and the other end is movably inserted in the second positioning hole.

[0011] By providing the motor shaft with a first positioning hole that is connected to the closed cavity and extends axially downward, and providing the top wall of the closed cavity with a second positioning hole that extends axially upward, one end of the positioning shaft can be movably inserted into the first positioning hole, and the other end can be movably inserted into the second positioning hole, thereby achieving the positioning of the positioning shaft and ensuring the stability of its movement.

[0012] In a preferred implementation of a food processing machine with reliable positioning, the distance between the bottom wall of the first positioning hole and the top wall of the second positioning hole is greater than the axial height of the positioning shaft.

[0013] By setting the distance between the bottom wall of the first positioning hole and the top wall of the second positioning hole to be greater than the axial height of the positioning shaft, when the processing workpiece presses the transmission part downward, even if the transmission part moves downward to the extreme position, there is still a gap between the top or bottom end of the positioning shaft and the top wall of the second positioning hole or the bottom wall of the first positioning hole, which effectively avoids the situation where the top or bottom end of the positioning shaft collides with the second positioning hole or the first positioning hole when the transmission part moves downward to the extreme position, causing the positioning shaft to deform and causing its positioning of the transmission part to fail, further ensuring the reliability of the positioning shaft in positioning the transmission part.

[0014] In a preferred implementation of a food processing machine with reliable positioning, the bottom wall of the first positioning hole is the first extreme position, the top wall of the second positioning hole is the second extreme position, one end of the positioning shaft is located at the first extreme position, and part of the positioning shaft extends into the second positioning hole; the other end of the positioning shaft is located at the second extreme position, and part of the positioning shaft is located in the first positioning hole.

[0015] By positioning one end of the positioning shaft at the first extreme position, part of the positioning shaft extends into the second positioning hole; and the other end of the positioning shaft is positioned at the second extreme position, part of the positioning shaft is positioned in the first positioning hole, so that no matter how the positioning shaft moves in the axial direction, part of the positioning shaft is always positioned in the first positioning hole and part of it is always positioned in the second positioning hole, so that after the motor shaft radially limits the positioning shaft, it can achieve effective positioning of the transmission member, which helps to further enhance the positioning effect of the positioning shaft on the transmission member.

[0016] In a preferred implementation of a food processing machine with reliable positioning, the motor includes a housing, and a top wall of the housing is provided with a limiting portion extending toward the processing part to the outside of the transmission part.

[0017] By providing a limiting portion on the top wall of the shell extending toward the outside of the transmission member in the direction of the workpiece, the transmission member can not only be radially positioned with the help of the motor shaft, but also be radially positioned through the positioning shaft and the limiting portion, thereby realizing triple radial positioning of the transmission member, further improving its positioning reliability, and thereby ensuring the stability of the position of the workpiece.

[0018] In a preferred implementation of a food processing machine with reliable positioning, a transmission part is provided on the top of the transmission part for transmission cooperation with the processing part, and the cooperation length L1 between the transmission part and the processing part and the axial height L2 of the processing part satisfy: 0.07≤L1 / L2≤0.2.

[0019] By setting the fitting length L1 between the transmission part and the workpiece and the axial height L2 of the workpiece to satisfy: 0.07≤L1 / L2≤0.2, it is avoided that the fitting length between the transmission part and the workpiece is too short relative to the axial height of the workpiece, resulting in the fitting length of the transmission part and the workpiece being too short, resulting in a small fitting area between the transmission part and the workpiece, and further resulting in unstable torque transmission between the transmission part and the workpiece or even slipping; at the same time, it is avoided that the fitting length between the transmission part and the workpiece is too long relative to the axial height of the workpiece, resulting in a short length of the processing area of ​​the workpiece and low processing efficiency.

[0020] In a preferred implementation of a food processing machine with reliable positioning, the width of the fitting clearance between the positioning shaft and the motor shaft is L3, and the width of the fitting clearance between the positioning shaft and the transmission member is L4, where 0.01 mm ≤ L3 = L4 ≤ 0.1 mm.

[0021] By setting the fitting clearance width between the positioning shaft and the motor shaft to L3, and the fitting clearance width between the positioning shaft and the transmission member to L4, 0.01mm≤L3=L4≤0.1mm, it is avoided that the fitting clearance width between the positioning shaft and the motor shaft or the fitting clearance width between the positioning shaft and the transmission member is too small, resulting in large friction between the positioning shaft and the motor shaft or the transmission member during movement, causing severe wear and generating large noise; at the same time, it is avoided that the fitting clearance width between the positioning shaft and the motor shaft or the fitting clearance width between the positioning shaft and the transmission member is too large, resulting in the radial limiting effect of the positioning shaft on the transmission member being deteriorated, causing it to sway. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 This is a cross-sectional view of a food processing machine in one embodiment of the present invention;

[0024] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0025] Figure 3 This is an exploded view of components such as a transmission member and a positioning shaft in one embodiment of the present invention;

[0026] Figure 4 This is a cross-sectional view of components such as a transmission member and a positioning shaft in one embodiment of the present invention.

[0027] List of parts and reference numerals:

[0028] 1-main machine, 11-limiting part; 2-motor, 21-motor shaft, 211-first positioning hole; 3-processing part; 4-transmission part, 41-sealed cavity, 411-second positioning hole, 42-transmission part, 43-transmission cavity; 5-spring; 6-positioning shaft. DETAILED DESCRIPTION

[0029] 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.

[0030] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific implementation methods disclosed below.

[0031] like Figures 1 to 4As shown, the present invention provides a food processing machine with reliable positioning, comprising a main unit 1 with a built-in motor 2 and a detachable processing assembly arranged above the main unit 1, the processing assembly is provided with a processing piece 3 that is transmission-connected to the motor shaft 21 of the motor 2, the processing piece 3 and the motor shaft 21 are transmission-connected via a transmission member 4, the transmission member 4 is movably sleeved on the outside of the motor shaft 21 on a side away from the processing piece 3, a positioning shaft 6 that is arranged along the axial direction of the motor shaft 21 is further provided in the transmission member 4, one end of the positioning shaft 6 is movably inserted into the motor shaft 21, and the other end is movably inserted into the transmission member 4, specifically, as shown in FIG. Figure 2 As shown, a spring 5 is sleeved outside the positioning shaft 6, one end of the spring 5 abuts against the motor shaft 21, and the other end abuts against the transmission member 4, so that when the transmission member 4 presses the spring 5 downward, the spring 5 has an upward elastic force on the transmission member 4.

[0032] The present application sets a transmission member 4 between the processing member 3 and the motor shaft 21, and realizes the transmission of torque from the motor shaft 21 to the processing member 3 through the transmission member 4, and the transmission member 4 is movably sleeved on the outside of the motor shaft 21 on the side away from the processing member 3, so that when the processing assembly is installed on the main machine 1, the connecting head at the bottom end of the processing member 3 can press the transmission member 4 downward and drive it to move downward. The transmission member 4 can always be in contact with the connecting head with the help of the upward elastic force, thereby ensuring the stability of the engagement between the transmission member 4 and the connecting head, and then ensuring the stability of the transmission between the two, and the axial vibration generated by the processing member 3 during the processing of food can also be offset by the reciprocating motion of the transmission member 4, thereby avoiding the situation where the vibration of the processing member 3 collides with the motor shaft 21 and generates a large noise when the processing member 3 is directly transmitted to the motor shaft 21, which helps to achieve sound insulation and noise reduction.

[0033] At the same time, a positioning shaft 6 is further provided in the transmission member 4 along the axial direction of the motor shaft 21. One end of the positioning shaft 6 is movably inserted in the motor shaft 21, and the other end is movably inserted in the transmission member 4. With the help of the positioning shaft 6, the limitation of the transmission member 4 and the motor shaft 21 is not limited to the cooperation between the two. At the same time, the lower part of the positioning shaft 6 can be positioned with the motor shaft 21, and the upper part is positioned with the transmission member 4, so as to realize the radial limitation of the positioning shaft 6 on the transmission member 4, ensure the coaxiality of the transmission member 4 and the motor shaft 21, and effectively avoid the deflection of the transmission member 4 during the torque transmission process, which causes the processing member 3 to deflect and cause unstable food processing and generate large processing noise, thereby improving the stability of torque transmission, and the positioning shaft 6 is not It can move axially not only relative to the transmission member 4, but also relative to the motor shaft 21. Compared with the existing method of fixing the positioning shaft 6 on the motor shaft 21, not only the transmission member 4 can realize axial movement, but the positioning shaft 6 can also move accordingly, which expands the radial positioning range of the positioning shaft 6 on the transmission member 4, thereby further improving the positioning effect of the transmission member 4, further avoiding the unstable positioning of the transmission member 4 and the motor shaft 21, which causes its deflection and then causes the processing member 3 to deflect. In particular, when the processing member 3 deflects during juicing, it causes the residue to be blocked between the screw and the inner wall of the processing chamber, thereby making it impossible to continue processing the food, which helps to improve the stability of food processing. It should be noted that the present application does not make any specific restrictions on the structure of the processing member 3. It can be a crushing knife, a dough knife, a grinding head, etc. Preferably, the processing member 3 is a screw to realize the functions of the food processor such as juicing.

[0034] As a preferred embodiment of the present application, Figure 2 、 Figure 4 As shown, the transmission member 4 is provided with a transmission cavity 43 which is open toward one side of the motor shaft 21. The motor shaft 21 extends into the transmission cavity 43 to form a closed cavity 41. Specifically, as shown in FIG. Figure 2 As shown, the closed cavity 41 is marked d, and during the up and down movement of the transmission member 4 , the axial height d of the closed cavity 41 changes accordingly, and the positioning shaft 6 is movably arranged in the closed cavity 41 .

[0035] By providing the transmission member 4 with a transmission cavity 43 that is open to one side of the motor shaft 21, and the motor shaft 21 extends into the transmission cavity 43 to form a closed cavity 41, the positioning shaft 6 is movably arranged in the closed cavity 41 to achieve the closure of the cavity inside the transmission member 4. Compared with the existing method of providing a through hole on the top of the transmission member for the positioning shaft 6 to pass through, it effectively avoids the situation in which slurry, etc. enters the closed cavity 41 through the gap between the positioning shaft 6 and the through hole during food processing, causing the residual food inside the cavity to produce odor or even mold, ensuring the cleanliness of the transmission member 4, and can avoid the situation in which food, etc. enters the closed cavity 41, causing friction with the positioning shaft 6 during its movement, generating noise and jamming, ensuring the smoothness of the movement of the positioning shaft 6, and thereby improving its positioning effect on the transmission member 4.

[0036] As a preferred embodiment of the present invention, Figure 2 As shown, the motor shaft 21 is provided with a first positioning hole 211 which is connected to the closed cavity 41 and extends axially downward, and the top wall of the closed cavity 41 is provided with a second positioning hole 411 which extends axially upward, and one end of the positioning shaft 6 is movably inserted in the first positioning hole 211, and the other end is movably inserted in the second positioning hole 411.

[0037] By providing the motor shaft 21 with a first positioning hole 211 that is connected to the closed cavity 41 and extends axially downward, and providing the top wall of the closed cavity 41 with a second positioning hole 411 that extends axially upward, one end of the positioning shaft 6 can be movably inserted into the first positioning hole 211, and the other end can be movably inserted into the second positioning hole 411, thereby realizing the positioning of the positioning shaft 6 and ensuring its stability in movement.

[0038] It should be noted that the present application does not specifically limit the relationship between the distance between the bottom wall of the first positioning hole 211 and the top wall of the second positioning hole 411 and the axial height of the positioning shaft 6. As a preferred embodiment, Figure 2 As shown, the distance between the bottom wall of the first positioning hole 211 and the top wall of the second positioning hole 411 is greater than the axial height of the positioning shaft 6 .

[0039] By setting the distance between the bottom wall of the first positioning hole 211 and the top wall of the second positioning hole 411 to be greater than the axial height of the positioning shaft 6, when the processing workpiece 3 presses the transmission member 4 downward, even if the transmission member 4 moves downward to the extreme position, there is still a gap between the top or bottom end of the positioning shaft 6 and the top wall of the second positioning hole 411 or the bottom wall of the first positioning hole 211, effectively avoiding the situation where the top or bottom end of the positioning shaft 6 collides with the second positioning hole 411 or the first positioning hole 211 when the transmission member 4 moves downward to the extreme position, causing the positioning shaft 6 to deform and causing its positioning of the transmission member 4 to fail, further ensuring the reliability of the positioning shaft 6 in positioning the transmission member 4.

[0040] As a preferred embodiment of this application, Figure 2 As shown, the bottom wall of the first positioning hole 211 is the first extreme position, the top wall of the second positioning hole 411 is the second extreme position, one end of the positioning shaft 6 is located at the first extreme position, and part of the positioning shaft 6 extends into the second positioning hole 411; the other end of the positioning shaft 6 is located at the second extreme position, and part of the positioning shaft 6 is located in the first positioning hole 211.

[0041] By positioning one end of the positioning shaft 6 at the first extreme position, part of the positioning shaft 6 extends into the second positioning hole 411; and the other end of the positioning shaft 6 is positioned at the second extreme position, part of the positioning shaft 6 is positioned in the first positioning hole 211, so that no matter how the positioning shaft 6 moves in the axial direction, a part of the positioning shaft 6 is always positioned in the first positioning hole 211, and a part of it is always positioned in the second positioning hole 411, so that after the motor shaft 21 radially limits the positioning shaft 6, it can realize effective positioning of the transmission member 4, which helps to further enhance the positioning effect of the positioning shaft 6 on the transmission member 4.

[0042] It should be noted that the present application does not specifically limit the structures of the first positioning hole 211 and the second positioning hole 411. As a preferred embodiment of the present application, Figure 2 As shown, the first positioning hole 211 and the second positioning hole 411 are blind holes.

[0043] As a preferred embodiment of the present application, Figure 2 、 Figure 4 As shown, the axial height of the second positioning hole 411 is a, the axial height of the positioning shaft 6 is c, the axial height of the first positioning hole 211 is b, and the depth of the gap between the top wall of the closed cavity 41 and the top of the motor shaft 21 in the free state is d, where c>a+d; c>b+d; c<a+b+d. Through the above arrangement, it is ensured that after the spring 5, positioning shaft 6, and transmission member 4 are installed, the following conditions are met: the positioning shaft 6 is always positioned and matched with the first positioning hole 211 and the second positioning hole 411; when the transmission member 4 is moved by the downward axial force, a gap is left between the positioning shaft 6 and the top of the second positioning hole 411, thereby positioning the positioning shaft 6 to achieve the positioning function between the transmission member 4 and the motor shaft 21.

[0044] As a preferred embodiment of the present application, Figure 2 As shown, the motor 2 includes a housing, and the top wall of the housing is provided with a limiting portion 11 extending toward the workpiece 3 to the outside of the transmission member 4. Figure 2 As shown, the limiting portion 11 is a positioning ring arranged around the outside of the transmission member 4.

[0045] By providing a limiting portion 11 on the top wall of the shell extending toward the workpiece 3 to the outside of the transmission member 4, the transmission member 4 can not only be radially positioned with the help of the motor shaft 21, but also be radially positioned through the positioning shaft 6, and can also be radially positioned through the limiting portion 11, thereby realizing triple radial positioning of the transmission member 4, further improving its positioning reliability, and thereby ensuring the stability of the position of the workpiece 3.

[0046] As a preferred embodiment of the present application, Figure 1 、 Figure 2 As shown, a transmission part 42 is provided on the top of the transmission member 4 for transmission cooperation with the workpiece 3. The cooperation length L1 between the transmission part 42 and the workpiece 3 and the axial height L2 of the workpiece 3 satisfy: 0.07≤L1 / L2≤0.2. Preferably, L1=12.2mm, and L2=127mm.

[0047] By setting the fitting length L1 between the transmission part 42 and the workpiece 3 and the axial height L2 of the workpiece 3 to satisfy: 0.07≤L1 / L2≤0.2, it is avoided that the fitting length between the transmission part 42 and the workpiece 3 is too short relative to the axial height of the workpiece 3, resulting in the fitting length between the transmission part 42 and the workpiece 3 being too short, resulting in a small fitting area between the transmission part 42 and the workpiece 3, and further resulting in unstable torque transmission between the transmission part 4 and the workpiece 3 or even slipping; at the same time, it is avoided that the fitting length between the transmission part 42 and the workpiece 3 is too long relative to the axial height of the workpiece 3, resulting in a short length of the processing area of ​​the workpiece 3 and low processing efficiency.

[0048] It should be noted that the present application does not specifically limit the structure of the positioning shaft 6. As a preferred embodiment of the present application, Figure 2 As shown, the positioning shaft 6 is cylindrical and has the same outer diameter at the top and bottom. Of course, it can also be multi-segmented along its axial direction, which can be distributed in 2-5 segments. Preferably, the outer diameter of the positioning shaft 6 gradually decreases from bottom to top.

[0049] As a preferred embodiment of the present application, Figure 2 As shown, the fitting clearance width between the positioning shaft 6 and the motor shaft 21 is L3, and the fitting clearance width between the positioning shaft 6 and the transmission member 4 is L4, 0.01mm≤L3=L4≤0.1mm. Preferably, L3=L4=0.05mm.

[0050] By setting the fitting clearance width between the positioning shaft 6 and the motor shaft 21 to L3, and the fitting clearance width between the positioning shaft 6 and the transmission member 4 to L4, 0.01mm≤L3=L4≤0.1mm, it is avoided that the fitting clearance width between the positioning shaft 6 and the motor shaft 21 or the fitting clearance width between the positioning shaft 6 and the transmission member 4 is too small, resulting in large friction between the positioning shaft 6 and the motor shaft 21 or the transmission member 4 during movement, causing severe wear and generating large noise; at the same time, it is avoided that the fitting clearance width between the positioning shaft 6 and the motor shaft 21 or the fitting clearance width between the positioning shaft 6 and the transmission member 4 is too large, resulting in the radial limiting effect of the positioning shaft 6 on the transmission member 4 being deteriorated, causing it to sway.

[0051] The technical solutions protected by this utility model are not limited to the above-described embodiments. It should be noted that the combination of the technical solutions of any one embodiment with the technical solutions of one or more other embodiments falls within the scope of protection of this utility model. Although the above description of this utility model has been provided in detail using general instructions and specific embodiments, it is obvious to those skilled in the art that modifications or improvements can be made based on this utility model. Therefore, such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A food processing machine with reliable positioning, comprising a main unit with a built-in motor and a detachable processing assembly disposed above the main unit, wherein the processing assembly comprises a processing member that is transmission-connected to a motor shaft of the motor, characterized in that: The processing part and the motor shaft are connected via a transmission part. The transmission part is movably sleeved on the outside of the motor shaft on a side away from the processing part. A positioning shaft is also provided in the transmission part along the axial direction of the motor shaft. One end of the positioning shaft is movably inserted into the motor shaft, and the other end is movably inserted into the transmission part.

2. A food processing machine with reliable positioning according to claim 1, characterized in that: The transmission member is provided with a transmission cavity which is open toward one side of the motor shaft. The motor shaft extends into the transmission cavity to form a closed cavity. The positioning shaft is movably arranged in the closed cavity.

3. A food processing machine with reliable positioning according to claim 2, characterized in that: The motor shaft is provided with a first positioning hole connected to the closed cavity and extending axially downward, the top wall of the closed cavity is provided with a second positioning hole extending axially upward, one end of the positioning shaft is movably inserted in the first positioning hole, and the other end is movably inserted in the second positioning hole.

4. A food processing machine with reliable positioning according to claim 3, characterized in that: The distance between the bottom wall of the first positioning hole and the top wall of the second positioning hole is greater than the axial height of the positioning shaft.

5. The food processing machine with reliable positioning according to claim 3, characterized in that: The bottom wall of the first positioning hole is the first extreme position, the top wall of the second positioning hole is the second extreme position, one end of the positioning shaft is located at the first extreme position, and part of the positioning shaft extends into the second positioning hole; the other end of the positioning shaft is located at the second extreme position, and part of the positioning shaft is located in the first positioning hole.

6. The food processing machine with reliable positioning according to claim 3, characterized in that: The first positioning hole and the second positioning hole are blind holes.

7. The food processing machine with reliable positioning according to claim 1, characterized in that: The motor includes a housing, and a top wall of the housing is provided with a limiting portion extending toward the processing part to the outside of the transmission part.

8. The food processing machine with reliable positioning according to claim 1, characterized in that: A transmission portion for transmission cooperation with the workpiece is provided on the top of the transmission member, and the cooperation length L1 between the transmission portion and the workpiece and the axial height L2 of the workpiece satisfy: 0.07≤L1 / L2≤0.

2.

9. The food processing machine with reliable positioning according to claim 1, characterized in that: The positioning shaft is multi-sectioned along its axial direction.

10. The food processing machine with reliable positioning according to claim 1, characterized in that: The width of the fitting clearance between the positioning shaft and the motor shaft is L3, and the width of the fitting clearance between the positioning shaft and the transmission member is L4, 0.01 mm≤L3=L4≤0.1 mm.

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