Screw rod applied to food processor and food processor

Abstract

The utility model discloses a food processor and a screw rod applied to the food processor, and relates to the field of life electric appliances, the screw rod is a metal screw rod, the metal screw rod comprises a screw rod body and a transmission shaft axially penetrating through the screw rod body, the transmission shaft and the screw rod body form an annular cavity, and a sealing piece is arranged at the bottom end cover of the annular cavity. The sealing piece is provided with an avoiding opening for the transmission shaft to penetrate through, the avoiding opening is welded to the transmission shaft, the periphery of the sealing piece is welded to the inner wall of the screw body, the transmission shaft can be directly connected with a cutter above the metal screw, torque is directly transmitted to the cutter from the transmission shaft, the coaxiality of all the components is higher, torque transmission is more stable, and the service life of the metal screw is prolonged. The conditions of deflection, high noise and serious abrasion of the metal screw and the cutting knife during transmission due to low coaxiality of the metal screw and the cutting knife caused by large manufacturing and production errors are effectively avoided, the transmission stability of the whole machine is ensured, and the working stability of the whole machine is favorably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a screw rod used in a food processing machine and the food processing machine. Background Art

[0002] Existing food processing machines such as juicers and juicers usually include a main unit with a built-in motor and a juice extraction component disposed above the main unit. The juice extraction component includes a juice extraction body disposed above the main unit and a material bin disposed above the juice extraction body. The juice extraction body includes a juice extraction net forming a juice extraction chamber and a juice collecting plate disposed outside the juice extraction net. When using the juicer, the user puts fruit and vegetable ingredients into the material bin. As the motor drives the extrusion component in the juice extraction chamber to rotate, the ingredients are squeezed out of the juice in the juice extraction chamber. The screw in the existing extrusion component is usually made of plastic, which has low strength and hardness. When the screw is extruding harder ingredients, the surface of the screw is prone to wear and the service life is short. In order to solve this problem, for example, Chinese utility model patent CN201620749119.3 discloses a juicer and its screw propeller, which sets the screw as a metal screw to increase the hardness of the screw, thereby improving the wear resistance. However, when the screw of the above structure is assembled, the bottom shaft cover is connected to the rotating body by welding. During the transmission process of the entire extrusion assembly, the torque of the motor is transmitted to the lower positioning shaft, and the lower positioning shaft is transmitted to the rotating body through the bottom shaft cover, and then the rotating body transmits the torque to the cutting tool. The entire transmission has a large size chain and a high requirement for coaxiality. When the bottom shaft cover is welded to the rotating body, the inconsistency of the welding points and the manufacturing tolerances of the components will cause the coaxiality of the rotating body and the cutting tool to be greatly reduced, which will cause the cutting tool and the rotating body to have a large runout during transmission, and will generate a large transmission noise and cause serious wear of the cutting tool, seriously affecting the consumer experience. Utility Model Content

[0003] The utility model aims to provide a screw and a food processing machine for use in a food processing machine, so as to solve the problem that the rotating body of the screw and the cutting blade transmission connection size chain in the existing food processing machine are too many, resulting in low coaxiality of each component, causing loud noise and severe wear during transmission.

[0004] To achieve the above-mentioned purpose, the utility model provides a screw for use in a food processing machine, wherein the screw is a metal screw, comprising a hollow screw body with an open bottom end and a transmission shaft axially penetrating the screw body, wherein the transmission shaft and the screw body form an annular cavity, a sealing member is provided at the bottom end cover of the annular cavity, and the sealing member is provided with an avoidance opening for the transmission shaft to pass through, the avoidance opening is welded to the transmission shaft, and the outer periphery of the sealing member is welded to the inner wall of the screw body.

[0005] The present application greatly improves the strength and hardness of the screw by setting the screw as a metal screw, so that the screw can grind hard ingredients smoothly, effectively avoiding the situation that the screw is easy to wear out during grinding due to its low hardness, which causes the subsequent processing effect of the ingredients to deteriorate and the service life to be shortened, thereby ensuring the grinding effect. At the same time, the metal screw includes a hollow screw body with an open bottom, which effectively reduces the weight of the metal screw, thereby greatly reducing the weight of the food processor, so that users can move the food processor more easily, improving the user experience, and reducing the amount of metal screw to be ejected, which can reduce its production cost.

[0006] The transmission shaft and the screw body form an annular cavity, the bottom end cover of the annular cavity is provided with a seal, and the seal is provided with an avoidance opening for the transmission shaft to pass through, the avoidance opening is welded to the transmission shaft, the outer periphery of the seal is welded to the inner wall of the screw body, the transmission shaft passes through the screw body and can be directly connected to the cutting knife above the metal screw, so that the torque is directly transmitted from the transmission shaft to the cutting knife, reducing the number and length of the transmission dimension chain, the coaxiality of each component is higher, and the torque transmission is more stable. Compared with the existing solution that needs to be transmitted to the screw body and then transmitted to the cutting knife through the screw body, it effectively avoids the metal screw and the cutting knife from swinging, making loud noises and severe wear during transmission due to the low coaxiality of the metal screw and the cutting knife caused by large manufacturing and production errors, thereby ensuring the stability of the whole machine transmission and helping to improve the stability of the whole machine operation.

[0007] In a preferred implementation of a screw used in a food processing machine, a transmission shaft is provided with a first step portion with a first step surface facing downward, an inner wall of a screw body is provided with a second step portion with a second step surface facing downward, a top wall of a seal at a relief opening abuts against below the first step surface, and a top wall of the seal abuts against below the second step surface.

[0008] By setting the seal at the avoidance so that the top wall abuts against the bottom of the first step surface, and the top wall of the seal abuts against the bottom of the second step surface, when the seal is welded to the drive shaft and the screw body, the seal can first be abutted against the first step surface and the second step surface to achieve rapid positioning of the seal, and then the seal, the drive shaft and the screw body are fixedly connected by welding, which can improve the assembly efficiency of the seal. At the same time, the position of the seal is unique, which can ensure the accurate positioning of the seal, the drive shaft and the screw body, and further improve the coaxiality of the three, thereby further ensuring the consistency of the coaxiality of the whole machine and improving the stability of the transmission of each component.

[0009] In a preferred implementation of a screw applied to a food processor, the seal is provided with a first welding portion cooperating with the first step surface and a second welding portion cooperating with the second step surface, and the seal extends obliquely downward from the first welding portion to the second welding portion.

[0010] By providing the sealing member with a first welding portion that cooperates with the first step surface and a second welding portion that cooperates with the second step surface, the sealing member is positioned through the cooperation of the first step surface and the second step surface with the first welding portion and the second welding portion, respectively, which can further improve the positioning accuracy. At the same time, the sealing member extends downwardly from the first welding portion to the second welding portion, so that the bottom of the metal screw is in an inverted cone shape, and then the metal screw is similar to the structure of the juice collecting plate below it, so that it can be located in the inverted cone space formed by the juice extraction net and the juice collecting plate, effectively improving the space occupancy rate inside the juice extraction cavity, thereby effectively reducing the amount of juice residue.

[0011] In a preferred implementation of a screw applied to a food processing machine, the seal includes a first horizontal vertical section extending laterally outward from an avoidance opening, an inclined section connected to the first horizontal vertical section and extending obliquely downward, and a second horizontal vertical section connected to the inclined section and extending laterally outward, the first welding portion is the first horizontal vertical section, and the second welding portion is the second horizontal vertical section.

[0012] By setting the first welding part as the first horizontal vertical section and the second welding part as the second horizontal vertical section, the contact area between the first welding part and the second welding part and the first step surface and the second step surface is greatly improved, which can further improve the matching stability between the seal and the transmission shaft and the screw body, and further improve the coaxiality of the three.

[0013] In a preferred implementation of a screw applied to a food processing machine, the screw body is provided with a through hole for the top end of the transmission shaft to pass through, and the through hole is welded to the transmission shaft.

[0014] By welding the through hole to the transmission shaft, the top and bottom ends of the metal screw are fixedly connected to the screw body respectively, so that the transmission shaft can transmit torque to the screw body at both the top and bottom ends, making the transmission more stable. Compared with the existing solution in which the bottom end of the screw body is only fixedly connected to the transmission shaft, the torque transmitted by the transmission shaft to the screw body can be effectively improved, and the situation in which the screw body is deformed or even separated from the transmission shaft when the torque transmitted by the transmission shaft is too large is avoided, thereby improving the working stability of the whole machine.

[0015] In a preferred implementation of a screw applied to a food processing machine, a grinding rib and a slag sweeping rib located below the grinding rib are provided on the outer wall of the screw body, and the grinding rib and the slag sweeping rib are smoothly connected.

[0016] By providing grinding ribs and slag sweeping ribs below the grinding ribs on the outer wall of the screw body, the grinding ribs can achieve fine filtration of juice, etc., and the juice, etc. can be further filtered seamlessly by the slag sweeping ribs during the downward flow of the juice, thereby effectively reducing the residue in the juice and improving the taste of the user. At the same time, the grinding ribs and the slag sweeping ribs are smoothly connected, so that the juice, etc. can flow more smoothly from the grinding ribs to the slag sweeping ribs, effectively avoiding the residue remaining at the junction of the two, and improving the smoothness of juicing.

[0017] In a preferred implementation of a screw applied to a food processing machine, a plurality of grinding ribs are provided, a material guide channel is formed between two adjacent grinding ribs, and the grinding ribs include a first rib connected to the slag sweeping rib and a second rib that divides the material guide channel equally.

[0018] By setting the grinding ribs to include a first rib connected to the residue sweeping rib and a second rib that divides the material guide channel equally, when the fruit juice enters the guide channel and moves downward, the multiple grinding and residue removal of the second ribs can further reduce the residue residue, and the taste of the discharged juice can be further improved.

[0019] As a preferred embodiment of the present application, the present application also includes a food processing machine, including a main unit with a built-in motor and a detachable juice extraction component arranged above the main unit, the juice extraction component includes a juice collecting chamber arranged above the main unit, a material bin arranged above the juice collecting chamber, and an extrusion component driven by a motor, the extrusion component includes the screw as described above and a pressing plate and a cutting knife arranged above the screw in sequence.

[0020] By setting the screw as described above in the food processing machine, the torque on the transmission shaft is directly transmitted from the transmission shaft to the cutting blade, the coaxiality of each component is higher, the torque transmission is more stable, the stability of the whole machine transmission is ensured, and the stability of the whole machine operation is improved.

[0021] In a preferred implementation of a food processor, a transmission part extending upward is provided on the top of the transmission shaft, the cutting blade is provided with a transmission hole for transmission cooperation with the transmission part, and the extrusion assembly further includes a connecting piece, which passes through the cutting blade and is fastened to the transmission part.

[0022] By configuring the extrusion assembly to also include a connecting piece, the connecting piece passes through the cutting blade and is fastened to the transmission part, so that in addition to achieving transmission connection with the transmission part through the transmission hole, the cutting blade can also fix the two through the connecting piece, which can further improve the stability of the connection with the transmission shaft and further avoid the situation where the cutting blade swings, causing collision noise between the cutting blade and the transmission shaft and poor cutting effect.

[0023] In a preferred implementation of the food processing machine, a wear-resistant pad is provided between the pressing plate and the cutting blade to isolate the two.

[0024] By providing a wear-resistant pad between the pressure plate and the cutting knife to isolate the two, on the one hand, the pressure plate and the cutting knife can be isolated with the help of the wear-resistant pad, thereby avoiding the situation where there is a gap between the two, which causes vibration noise and unstable transmission when the cutting knife rotates; on the other hand, it avoids the situation where the cutting knife collides with the pressure plate for a long time, causing severe wear of the cutting knife and shortening its service life, thereby protecting the cutting knife and the pressure plate and extending their service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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:

[0026] Figure 1 This is a schematic diagram of the structure of a screw rod in one embodiment of the utility model;

[0027] Figure 2 This is an exploded view of a screw in one embodiment of the utility model;

[0028] Figure 3 A cross-sectional view of a screw in one embodiment of the utility model;

[0029] Figure 4 for Figure 3 Enlarged view of part A in the middle;

[0030] Figure 5 A cross-sectional view of a juice extraction component in one embodiment of the utility model;

[0031] Figure 6 This is a schematic structural diagram of an extrusion assembly in one embodiment of the utility model;

[0032] Figure 7 It is a cross-sectional view of structures such as an extrusion component in one embodiment of the utility model.

[0033] List of parts and reference numerals:

[0034] 1-screw, 11-screw body, 111-grinding rib, 112-slag sweeping rib, 1121-first rib, 1122-second rib, 113-annular cavity, 114-second step portion, 1141-second step surface, 12-transmission shaft, 121-first step portion, 1211-first step surface, 122-transmission portion; 13-seal, 131-first welding portion, 132-second welding portion, 133-inclined section, 134-avoidance; 2-juice collecting chamber; 3-silo; 4-cutting knife, 41-transmission hole; 5-pressing plate; 6-wear-resistant pad; 7-connecting piece. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] like Figures 1 to 7 As shown, the utility model provides a screw 1 used in a food processing machine, wherein the screw 1 is a metal screw 1, comprising a hollow screw body 11 with an open bottom end and a transmission shaft 12 axially penetrating the screw body 11, wherein the transmission shaft 12 and the screw body 11 form an annular cavity 113, wherein a sealing member 13 is provided at the bottom end cover of the annular cavity 113, and the sealing member 13 is provided with an escape opening 134 for the transmission shaft 12 to pass through, wherein the escape opening 134 is welded to the transmission shaft 12, and the outer periphery of the sealing member 13 is welded to the inner wall of the screw body 11, and preferably, the screw body 11, the transmission shaft 12 and the sealing member 13 are all metal parts.

[0038] The present application greatly improves the strength and hardness of the screw 1 by setting the screw 1 as a metal screw 1, so that the screw 1 can grind hard food smoothly, effectively avoiding the situation that the screw 1 is easy to wear during grinding due to its low hardness, which causes the subsequent processing effect of the food to deteriorate and the service life to be shortened, thereby ensuring its grinding effect. At the same time, the metal screw 1 includes a hollow screw body 11 with an open bottom, which effectively reduces the weight of the metal screw 1, thereby greatly reducing the weight of the food processor, so that the user can move the food processor more easily, improve the user experience, and reduce the demoulding amount of the metal screw 1, which can reduce its production cost.

[0039] The transmission shaft 12 and the screw body 11 form an annular cavity 113, and the bottom end cover of the annular cavity 113 is provided with a seal 13, and the seal 13 is provided with an avoidance opening 134 for the transmission shaft 12 to pass through, and the avoidance opening 134 is welded to the transmission shaft 12, and the outer periphery of the seal 13 is welded to the inner wall of the screw body 11. The transmission shaft 12 passes through the screw body 11 and can be directly connected to the cutting blade 4 above the metal screw 1, so that the torque is directly transmitted from the transmission shaft 12 to the cutting blade 4, reducing the number and length of the transmission dimension chain, the coaxiality of each component is higher, and the torque transmission is more stable. Compared with the existing solution that needs to be transmitted to the screw body 11 and then transmitted to the cutting blade 4 through the screw body 11, it effectively avoids the situation that the metal screw 1 and the cutting blade 4 have low coaxiality due to large manufacturing and production errors, resulting in the metal screw 1 and the cutting blade 4 swaying, high noise and severe wear during transmission, thereby ensuring the stability of the whole machine transmission and helping to improve the stability of the whole machine operation.

[0040] As a preferred implementation of the present application, Figure 4 As shown, the transmission shaft 12 is provided with a first step portion 121 with a first step surface 1211 facing downward, the inner wall of the screw body 11 is provided with a second step portion 114 with a second step surface 1141 facing downward, and the top wall of the seal 13 at the avoidance opening 134 abuts against the bottom of the first step surface 1211, and the top wall of the seal 13 abuts against the bottom of the second step surface 1141.

[0041] By setting the seal 13 at the avoidance opening 134 so that the top wall abuts against the bottom of the first step surface 1211, and the top wall of the seal 13 abuts against the bottom of the second step surface 1141, when the seal 13 is welded to the transmission shaft 12 and the screw body 11, the seal 13 can be first abutted against the first step surface 1211 and the second step surface 1141 to achieve rapid positioning of the seal 13, and then the seal 13 is fixedly connected to the transmission shaft 12 and the screw body 11 through welding, which can improve the assembly efficiency of the seal 13. At the same time, the position of the seal 13 is unique, which can ensure the accurate positioning of the seal 13, the transmission shaft 12 and the screw body 11, and further improve the coaxiality of the three, thereby further ensuring the consistency of the coaxiality of the whole machine and improving the stability of the transmission of each component.

[0042] Furthermore, if Figure 4 As shown, the sealing member 13 is provided with a first welding portion 131 matched with the first step surface 1211 and a second welding portion 132 matched with the second step surface 1141 , and the sealing member 13 extends obliquely downward from the first welding portion 131 to the second welding portion 132 .

[0043] By providing the sealing member 13 with a first welding portion 131 that cooperates with the first step surface 1211 and a second welding portion 132 that cooperates with the second step surface 1141, the sealing member 13 is positioned by the cooperation of the first step surface 1211 and the second step surface 1141 with the first welding portion 131 and the second welding portion 132, respectively, which can further improve the positioning accuracy. At the same time, the sealing member 13 extends downward from the first welding portion 131 to the second welding portion 132, so that the bottom of the metal screw 1 is inverted cone shape, and then the metal screw 1 is similar to the structure of the juice collecting plate below it, so that it can be located in the inverted cone space formed by the juice extraction net and the juice collecting plate, effectively improving the space occupancy rate inside the juice extraction cavity, thereby effectively reducing the amount of juice residue.

[0044] It should be noted that the present application does not specifically limit the structure of the sealing member 13. As a preferred embodiment of the present application, Figure 4 As shown, the seal 13 includes a first horizontal straight section extending laterally outward from the avoidance opening 134, an inclined section 133 connected to the first horizontal straight section and extending obliquely downward, and a second horizontal straight section connected to the inclined section 133 and extending laterally outward, the first welding portion 131 is the first horizontal straight section, and the second welding portion 132 is the second horizontal straight section.

[0045] By setting the first welding portion 131 as the first horizontal vertical section and the second welding portion 132 as the second horizontal vertical section, the contact area between the first welding portion 131 and the second welding portion 132 and the first step surface 1211 and the second step surface 1141 is greatly improved, which can further improve the matching stability between the seal 13 and the transmission shaft 12 and the screw body 11, and further improve the coaxiality of the three.

[0046] As a preferred implementation of the present application, Figure 3 As shown, the screw body 11 is provided with a through hole for the top end of the transmission shaft 12 to pass through, and the through hole is welded to the transmission shaft 12 . Preferably, the top edge of the through hole is welded to the transmission shaft 12 .

[0047] By welding the through hole to the transmission shaft 12, the top and bottom ends of the metal screw 1 are fixedly connected to the screw body 11 respectively, so that the transmission shaft 12 can transmit the torque to the screw body 11 at both the top and bottom ends, making the transmission more stable. Compared with the existing solution in which the bottom end of the screw body 11 is only fixedly connected to the transmission shaft 12, the torque transmitted by the transmission shaft 12 to the screw body 11 can be effectively improved, and the situation that the screw body 11 is deformed or even the screw body 11 is separated from the transmission shaft 12 when the torque transmitted by the transmission shaft 12 is too large is avoided, thereby improving the working stability of the whole machine.

[0048] As a preferred implementation of the present application, Figure 1As shown, the outer wall of the screw body 11 is provided with a grinding rib 111 and a slag sweeping rib 112 located below the grinding rib 111 , and the grinding rib 111 and the slag sweeping rib 112 are smoothly connected.

[0049] By providing the outer wall of the screw body 11 with a grinding rib 111 and a slag sweeping rib 112 located below the grinding rib 111, the grinding rib 111 can achieve fine filtration of the juice, etc., and the juice, etc. can be further filtered seamlessly by the slag sweeping rib 112 during the downward flow of the juice, thereby effectively reducing the residue in the juice and improving the taste of the user. At the same time, the grinding rib 111 and the slag sweeping rib 112 are smoothly connected, so that the juice, etc. can flow more smoothly from the grinding rib 111 to the slag sweeping rib 112, effectively avoiding the residue remaining at the junction of the two, and improving the smoothness of juicing.

[0050] Furthermore, if Figure 1 As shown, a plurality of grinding ribs 111 are provided, and a material guiding channel is formed between two adjacent grinding ribs 111 . The grinding ribs 111 include a first rib 1121 connected to the slag sweeping rib 112 and a second rib 1122 that divides the material guiding channel equally.

[0051] By setting the grinding rib 111 to include a first rib 1121 connected to the residue sweeping rib 112 and a second rib 1122 that divides the material guide channel equally, when the fruit juice enters the guide channel and moves downward, the multiple grinding and residue removal of the second rib 1122 can further reduce the residue residue, and the taste of the discharged juice can be further improved.

[0052] As a preferred embodiment of this application, Figure 5 , Figure 6 As shown, the present application also includes a food processing machine, including a main machine with a built-in motor and a detachable juice extraction assembly arranged above the main machine, the juice extraction assembly includes a juice collecting chamber 2 arranged above the main machine, a material bin 3 arranged above the juice collecting chamber 2, and an extrusion assembly driven by a motor, the extrusion assembly includes the screw 1 as described above, and a pressing plate 5 and a cutting knife 4 arranged above the screw 1 in sequence.

[0053] By setting the screw 1 as described above in the food processing machine, the torque on the transmission shaft 12 is directly transmitted from the transmission shaft 12 to the cutting blade 4, the coaxiality of each component is higher, the torque transmission is more stable, the stability of the whole machine transmission is ensured, and it helps to improve the stability of the whole machine operation.

[0054] As a preferred implementation of the present application, Figure 7 As shown, a transmission part 122 extending upward is provided on the top of the transmission shaft 12 , and the cutting blade 4 is provided with a transmission hole 41 which is transmission-matched with the transmission part 122 . The extrusion assembly also includes a connecting member 7 which passes through the cutting blade 4 and is fastened to the transmission part 122 .

[0055] By configuring the extrusion assembly to also include a connecting piece 7, the connecting piece 7 passes through the cutting blade 4 and is fastened to the transmission part 122, so that the cutting blade 4 can not only achieve a transmission connection with the transmission part 122 through the transmission hole 41, but can also fix the two through the connecting piece 7, which can further improve the stability of the connection with the transmission shaft 12 and further avoid the situation where the cutting blade 4 swings, causing collision noise between the cutting blade 4 and the transmission shaft 12 and poor cutting effect.

[0056] Furthermore, if Figure 7 As shown, a wear-resistant pad 6 is provided between the pressure plate 5 and the cutting blade 4 to isolate the two.

[0057] By providing a wear-resistant pad 6 between the pressure plate 5 and the cutting blade 4 to isolate the two, on the one hand, the pressure plate 5 and the cutting blade 4 can be isolated with the help of the wear-resistant pad 6, thereby avoiding the situation where there is a gap between the two, which causes vibration noise and unstable transmission when the cutting blade 4 rotates; on the other hand, it avoids the situation where the cutting blade 4 collides with the pressure plate 5 for a long time, causing serious wear of the cutting blade 4 and shortening its service life, thereby achieving protection for the cutting blade 4 and the pressure plate 5 and extending their service life.

[0058] Furthermore, if Figure 7 As shown, the cutting blade 4 is provided with a transmission column extending downward and forming a transmission hole 41, the pressure plate 5 is provided with a through hole cooperating with the transmission column, and the wear-resistant pad 6 includes a first wear-resistant portion arranged between the through hole and the transmission column and a second wear-resistant portion arranged between the pressure plate 5 and the bottom wall of the cutting blade 4.

[0059] 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 screw used in a food processing machine, characterized in that: The screw is a metal screw, which includes a hollow screw body with an open bottom end and a transmission shaft axially penetrating the screw body. The transmission shaft and the screw body form an annular cavity. The bottom end cover of the annular cavity is provided with a sealing member, and the sealing member is provided with an escape opening for the transmission shaft to pass through. The escape opening is welded to the transmission shaft, and the outer periphery of the sealing member is welded to the inner wall of the screw body.

2. The screw used in a food processing machine according to claim 1, characterized in that: The transmission shaft is provided with a first step portion with a first step surface facing downward, the inner wall of the screw body is provided with a second step portion with a second step surface facing downward, the top wall of the seal at the avoidance is abutted against the bottom of the first step surface, and the top wall of the seal is abutted against the bottom of the second step surface.

3. The screw used in a food processing machine according to claim 2, characterized in that: The sealing member is provided with a first welding portion matched with the first step surface and a second welding portion matched with the second step surface, and the sealing member extends obliquely downward from the first welding portion to the second welding portion.

4. The screw used in a food processing machine according to claim 3, characterized in that: The seal includes a first horizontal straight section extending laterally outward from the avoidance, an inclined section connected to the first horizontal straight section and extending obliquely downward, and a second horizontal straight section connected to the inclined section and extending laterally outward, the first welding portion is the first horizontal straight section, and the second welding portion is the second horizontal straight section.

5. The screw used in a food processing machine according to claim 1, characterized in that: The screw body is provided with a through hole for the top end of the transmission shaft to pass through, and the through hole is welded to the transmission shaft.

6. The screw used in a food processing machine according to claim 1, characterized in that: The outer wall of the screw body is provided with a grinding rib and a slag sweeping rib located below the grinding rib, and the grinding rib is smoothly connected to the slag sweeping rib.

7. The screw used in a food processing machine according to claim 6, characterized in that: The grinding ribs are provided with a plurality of them, and a material guiding channel is formed between two adjacent grinding ribs. The grinding ribs include a first rib connected to the slag sweeping rib and a second rib that equally divides the material guiding channel.

8. A food processing machine, characterized in that: The invention comprises a main unit with a built-in motor and a detachable juice extraction component arranged above the main unit, wherein the juice extraction component comprises a juice collecting chamber arranged above the main unit, a material bin arranged above the juice collecting chamber and an extrusion component driven by the motor, wherein the extrusion component comprises a screw as described in any one of claims 1 to 7 and a pressing plate and a cutting knife arranged above the screw in sequence.

9. A food processing machine according to claim 8, characterized in that: The top of the transmission shaft is provided with a transmission part extending upward, the cutting blade is provided with a transmission hole which is transmission-matched with the transmission part, and the extrusion assembly also includes a connecting piece which passes through the cutting blade and is fastened to the transmission part.

10. A food processing machine according to claim 9, characterized in that: A wear-resistant pad is provided between the pressing plate and the cutting blade to isolate the two.

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