Sectional type extrusion screw rod and normal juice machine

Abstract

The invention discloses a sectional type extrusion screw, and belongs to the field of food processing equipment.The sectional type extrusion screw comprises a screw body, and the screw body comprises a feeding end; a spiral convex rib used for extruding or crushing fruits and vegetables is arranged on the side, close to the feeding end, of the peripheral side of the screw main body, and the spiral convex rib forms a first extrusion section; the extrusion screw further comprises a second extrusion section, the second extrusion section is far away from the feeding end, the second extrusion section comprises at least one second convex rib arranged on the peripheral side of the screw main body, and a guide surface for guiding fruits and vegetables to be extruded in the radial direction is arranged on the second convex rib; after fruits and vegetables are extruded and crushed by the first extrusion section, residual parts enter the second extrusion section, and the residual parts are extruded to a second filter screen of the juicer in the second extrusion section under the guidance of the second convex ribs to be scraped and ground so as to form secondary filtration. The sectional type extrusion screw rod and the juicer adopting the sectional type extrusion screw rod have the advantages that the nutrition of fruit juice extracted by the juicer is improved, and meanwhile, the juice yield is increased.

Description

[Technical field]

[0001] The invention relates to a segmented extrusion screw and a juicer, belonging to the field of food processing equipment. [Background technology]

[0002] With the advancement of technology and the improvement of living standards, juicers or juicers are becoming more and more popular. The main structure of a juicer or juicer includes a main body and a juice extraction component connected to the main body, and the juice extraction component usually includes an extrusion screw and an extrusion barrel. The principle is to allow the extrusion screw to rotate in the extrusion barrel, so that the fruits and vegetables to be squeezed are squeezed out of liquid between the extrusion screw and the extrusion barrel.

[0003] With the current traditional extrusion screw, fruits and vegetables usually enter the feed end from a large piece, and then go through a crushing and extrusion step to become small particles of pulp. Some juicers will also have a grinding layer to grind the small particles of pulp again, and then the residue will be discharged from the residue outlet to complete the juicing process. The current structure of the juicer will result in a large amount of juice and nutrients in the pulp being discharged along with the residue, resulting in a large amount of material and nutrient waste. [Summary of the invention]

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a juice extractor to improve the nutrition of the juice extracted by the juice extractor.

[0005] To solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A segmented extrusion screw, comprising:

[0007] a screw body, the screw body comprising a feed end;

[0008] The outer peripheral side of the screw body is provided with a spiral rib for extruding or crushing fruits and vegetables at a side close to the feeding end, and the spiral rib forms a first extrusion section;

[0009] The extrusion screw further comprises an independent second extrusion section, the second extrusion section is far away from the feed end, the second extrusion section comprises at least one second convex rib arranged on the outer peripheral side of the screw body, and the second convex rib is provided with a guiding surface for guiding the fruits and vegetables to be extruded in a radial direction;

[0010] After the fruits and vegetables are squeezed and crushed in the first extrusion section, the remaining part enters the second extrusion section, and is squeezed into the second filter screen of the juicer under the guidance of the second convex ribs in the second extrusion section for scraping to form secondary filtration.

[0011] The beneficial effects of the present invention are as follows:

[0012] In the present invention, the extrusion screw is designed to be segmented, and the first extrusion section is mainly used to extrude and crush the large pieces of pulp fed. The juice extruded in the first extrusion section is usually the most, but this part of the extrusion is basically pure liquid, because the pulp has not been completely crushed at this stage, and most of the liquid is squeezed out. As the pulp passes through the first extrusion section, the large pieces of pulp are gradually cut and crushed into small granular pulp. In these pulps, there are also a large number of water-soluble fruit and vegetable fibers that can be digested and absorbed by the human body. In the present invention, the extrusion screw is specially provided with an independent second extrusion section, and at least one second convex rib is provided in the second extrusion section. The second convex rib is provided with a guide surface for guiding the fruits and vegetables to be extruded in the radial direction. The residual part of the pulp is squeezed into the second filter screen of the juicer under the guidance of the second convex rib in the second extrusion section for scraping. The function of the second extrusion section is mainly scraping. In this scraping process, since the second convex rib has a guide surface that guides radially outward, in this process, whether it is liquid or water-soluble fruit and vegetable fiber, most of them will be squeezed into the second filter screen by this scraping method to seep out, thereby forming secondary filtration.

[0013] By adopting the extrusion screw of the present invention, the pulp can be extruded in sections, especially the second extrusion section, which not only further squeezes out the juice liquid, but also further squeezes and filters some water-soluble fruit and vegetable fibers, thereby increasing the nutritional content in the squeezed juice and the juice output.

[0014] Preferably, the guide surface is an inclined surface or a curved surface, and the guide surface is configured such that: along the rotation direction of the extrusion screw, the distance between the guide surface and the central axis gradually decreases.

[0015] Preferably, the second convex ribs are distributed outside the screw body in an inclined shape relative to the axial direction.

[0016] Preferably, the extrusion screw is further provided with a grinding section between the first extrusion section and the second extrusion section, and the fruits and vegetables enter the grinding section after being extruded from the first extrusion section, and enter the second extrusion section after being ground in the grinding section.

[0017] Preferably, the grinding section comprises at least one first tooth-shaped portion provided on the outer peripheral side of the screw body.

[0018] Preferably, the grinding section comprises an outer flange extending radially outward, and the first toothed portion is arranged on the outer flange.

[0019] Preferably, the top surface of the outer flange includes an inclined surface, and the first toothed portion is arranged on the inclined surface.

[0020] Preferably, the extrusion screw is provided with a flow channel between the grinding section and the second extrusion section for allowing fruits and vegetables to flow from the grinding section into the second extrusion section.

[0021] Preferably, the grinding section is an integral structure with the screw body; or, a grinding sleeve is sleeved on the outside of the screw body, the grinding sleeve includes the grinding section, and the grinding sleeve is a metal body.

[0022] Preferably, the second extrusion section is an integral structure with the screw body; or, an extrusion sleeve is sleeved outside the screw body, and the second extrusion section is located on the extrusion sleeve.

[0023] Preferably, the extrusion sleeve is a soft body as a whole; or, the second convex rib is a soft body.

[0024] Preferably, the second convex rib is a soft body.

[0025] Preferably, the extrusion screw further comprises a slag discharge rib on a side of the second extrusion section away from the feed end, and the residue generated in the second extrusion section is discharged through the guidance of the slag discharge rib.

[0026] In addition, the present invention also discloses a juicer, including a main body, a feeding assembly and an extrusion assembly, wherein a driver is provided in the main body, and the extrusion assembly includes an extrusion barrel and an extrusion screw at least partially provided in the extrusion barrel, and the driver is transmission-connected to the extrusion screw so that the extrusion screw rotates in the extrusion barrel, and the extrusion screw adopts a segmented extrusion screw in any of the above-mentioned schemes, and the extrusion assembly is provided with a juice outlet, and the liquid and / or substance extruded through the first extrusion section and the second extrusion section are both connected to the juice outlet.

[0027] Preferably, the extrusion cylinder is provided with a first filter and a second filter respectively, the first filter corresponds to the first extrusion section, the second filter corresponds to the second extrusion section, the filter holes of the second filter are smaller than or equal to the filter holes of the first filter, and the first filter and the second filter are both connected to the juice outlet.

[0028] Preferably, the pore size of the first filter screen is in the range of 0.3 mm to 2 mm; and / or the pore size of the second filter screen is in the range of 0.3 mm to 0.5 mm.

[0029] Preferably, the extrusion gap between the first extrusion section and the first filter screen is larger than the extrusion gap between the second extrusion section and the second filter screen.

[0030] Preferably, the second rib and the second filter screen are clearance-fitted, and the clearance is less than or equal to 0.5 mm; or, the second rib is a soft body, and the second rib and the second filter screen are interference-fitted.

[0031] Preferably, the extrusion screw is further provided with a grinding section between the first extrusion section and the second extrusion section. After being extruded from the first extrusion section, the fruits and vegetables enter the grinding section, and after being ground in the grinding section, they enter the second extrusion section. The grinding section includes at least one first tooth-shaped portion arranged on the outer peripheral side of the screw body, and a second tooth-shaped portion matching the first tooth-shaped portion is provided on the inner wall of the extrusion barrel.

[0032] Preferably, the grinding section comprises an outer flange formed by radially extending the screw body outward, the first tooth-shaped portion is arranged on the outer flange, and the extrusion barrel is provided with an outer convex ring at a position corresponding to the outer flange.

[0033] Preferably, the top surface of the outer flange includes an inclined surface, the first tooth-shaped portion is arranged on the inclined surface, and a second tooth-shaped portion is arranged on the inner wall of the outer convex ring at a position corresponding to the first tooth-shaped portion.

[0034] Preferably, the gap between the first toothed portion and the second toothed portion is 0.1 mm to 0.5 mm.

[0035] Preferably, the extrusion assembly also includes an outer cylinder body arranged outside the extrusion cylinder, the juice outlet is arranged on the outer cylinder body, and a liquid channel is formed between the outer cylinder body and the extrusion cylinder, and the liquid and / or substance extruded through the first extrusion section and the second extrusion section enters the liquid channel.

[0036] Preferably, the outer cylinder is provided with a residue discharge port, and the residues after the fruits and vegetables are squeezed between the extrusion cylinder and the second extrusion section are discharged through the residue discharge port.

[0037] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0038] The present invention will be further described below in conjunction with the accompanying drawings:

[0039] Figure 1 This is a schematic diagram of the structure of an extrusion screw in accordance with an embodiment of the present invention;

[0040] Figure 2 This is an exploded schematic diagram of an extrusion screw in accordance with an embodiment of the present invention;

[0041] Figure 3 for Figure 1 A local enlarged schematic diagram of the middle A;

[0042] Figure 4 This is an overall schematic diagram of a juicer according to a second embodiment of the present invention;

[0043] Figure 5 This is an exploded schematic diagram of a juicer according to a second embodiment of the present invention;

[0044] Figure 6 It is a cross-sectional schematic diagram of the extrusion assembly and the feeding assembly in the second embodiment of the present invention;

[0046] Figure 7 It is a cross-sectional schematic diagram of the extrusion screw and the extrusion barrel in the second embodiment of the present invention. [Specific implementation method]

[0048] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0049] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention.

[0050] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through an intermediate structure, but are only connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0052] Embodiment 1:

[0053] like Figures 1 to 3 As shown, a segmented extrusion screw 300 is shown, which is mainly used for extruding fruits and vegetables in a juicer. The segmented extrusion screw 300 in this embodiment is mainly used in a vertical juicer. This embodiment specifically includes: a screw body 30, the screw body 30 includes a feed end, Figure 1 For example, the feed end is the top of the screw body 30 , and the fruits and vegetables mainly enter from the top feed end and are gradually squeezed downward by the extrusion screw 300 .

[0054] The outer peripheral side of the screw body 30 is provided with a spiral rib 31 for squeezing or crushing fruits and vegetables near the feeding end, and the spiral rib 31 forms a first extrusion section 300A; the first extrusion section 300A is a structure that most of the extrusion screws 300 of the juicer currently have. The spiral rib 31 is mainly used to squeeze the fruits and vegetables that have just entered. At the same time, the spiral design also plays a role in guiding the fruits and vegetables gradually downward. In the juicer, the extrusion gap between the first extrusion section 300A and the inner wall of the extrusion barrel 21 is relatively large, which helps large pieces of pulp to enter.

[0055] The extrusion screw 300 further includes a second extrusion section 300C, which is far away from the feed end. Figure 1 For example, the second extrusion segment 300C is close to the bottom position of the extrusion screw 300, and the second extrusion segment 300C includes at least one second convex rib 32 arranged on the outer peripheral side of the screw body 30, and the second convex rib 32 is provided with a guiding surface 321 for guiding the fruits and vegetables to be extruded in the radial direction; after the fruits and vegetables are extruded and crushed by the first extrusion segment 300A, the remaining parts enter the second extrusion segment 300C again, and the remaining parts are squeezed into the second filter screen 212 of the juicer in the second extrusion segment 300C under the guidance of the second convex rib 32 for scraping to form secondary filtration.

[0056] In this embodiment, the extrusion screw 300 is designed to be segmented. The first extrusion segment 300A is mainly used to extrude and crush the large pieces of pulp fed in and guide the pulp further downward. The juice squeezed out in the first extrusion segment 300A is usually the largest, but this part of the juice is basically pure liquid, because the pulp has not been completely crushed at this stage, and most of the liquid in the fruits and vegetables is squeezed out.

[0057] As the pulp passes through the first extrusion section 300A, the large pieces of pulp are gradually cut and broken into small particles. In fact, there are a lot of water-soluble fruit and vegetable fibers that can be digested and absorbed by the human body in these small particles of pulp. In this embodiment, the extrusion screw 300 is specially provided with an independent second extrusion section 300C, and at least one second convex rib 32 is provided in the second extrusion section 300C. The second convex rib 32 is provided with a guiding surface 321 for guiding the fruits and vegetables to be extruded in the radial direction. The remaining part of the pulp is in the second extrusion section 300C and is located on the second convex rib 32. The fruits and vegetables are guided to be squeezed to the second filter screen 212 of the juicer for scraping. The difference from the first extrusion section 300A is that the first extrusion section 300A mainly guides the fruits and vegetables to feed downward during the extrusion process, while the second extrusion section 300C mainly scrapes in the radial direction. In this scraping process, since the second convex rib 32 has a guiding surface 321 that guides radially outward, most of the liquid and water-soluble fruit and vegetable fibers will be squeezed into the second filter screen 212 by this scraping method to seep out, thereby forming a secondary filtration.

[0058] By using the extrusion screw 300 of this structure, the pulp can be extruded in sections, especially the second extrusion section 300C, which not only further squeezes out the juice liquid, but also further squeezes and filters some water-soluble fruit and vegetable fibers, thereby increasing the nutritional content in the squeezed juice and increasing the juice output.

[0059] Regarding the specific structure of the guide surface 321, Figure 3 As shown, in this embodiment, the guide surface 321 is an inclined surface or an arc surface, and the guide surface 321 is configured such that: along the rotation direction of the extrusion screw 300, the distance between the guide surface 321 and the central axis gradually decreases. Figure 3 For example, the arrow indicates the direction of rotation of the extrusion screw 300 , along which the guide surface 321 increasingly fits the side surface of the extrusion screw 300 . When the residual fruit and vegetable part contacts the guide surface 321 , it will converge radially outward along the guide surface 321 and be squeezed out from the second filter screen 212 .

[0060] For the layout or extension direction of the second rib 32, refer to Figures 1 to 3The second rib 32 is distributed outside the screw body 30 in an inclined shape relative to the axial direction. The axial direction referred to here is the axial direction of the rotation center axis of the extrusion screw 300, that is, the second rib 32 is not parallel to the axial direction. From a side view, the second rib 32 and the center axis are obliquely intersected. The second rib 32 is designed in this way to reduce the resistance during the scraping process. At the same time, compared with the vertical design, this inclined design prevents the residual part of fruits and vegetables from immediately sliding into the residue discharge port 222, but adds a buffer function, which makes the scraping time longer. In addition, it can also make the residue discharge smoother without causing the residue to be too concentrated in a certain position.

[0061] It should be noted that, in other embodiments, the second convex rib 32 is not limited to being of an inclined design, and may also be of a vertical design.

[0062] In order to make the fruit and vegetable fibers be better extruded in the second extrusion section 300C, in this embodiment, the extrusion screw 300 is further provided with a grinding section 300B between the first extrusion section 300A and the second extrusion section 300C. After being extruded from the first extrusion section 300A, the fruits and vegetables enter the grinding section 300B, and enter the second extrusion section 300C after being ground by the grinding section 300B. The main function of the grinding section 300B is to further grind the small particles of pulp into puree, which is closer to the fluid form. With the scraping of the second extrusion section 300C, the scraping effect can be better, thereby increasing the output rate of juice and fruit and vegetable fibers in the second extrusion section 300C.

[0063] The extrusion screw 300 in this embodiment substantially realizes a three-stage juicing process, namely, from the initial crushing and extrusion, to the finer small-particle pulp grinding and extrusion, to the final fruit puree scraping, which cooperate with each other to achieve the purpose of increasing the amount of juice and the nutrition of the juice.

[0064] Regarding the specific structure of the grinding section 300B, Figure 1 or Figure 3 As shown, the grinding section 300B in this embodiment includes at least one first tooth-shaped portion 33 provided on the outer peripheral side of the screw body 30. In this embodiment, a plurality of first tooth-shaped portions 33 are evenly distributed in the circumferential direction, and the whole is similar to a toothed disc. Compared with the spiral ribs 31 in the first extrusion section 300A, this toothed disc type grinding method can crush the pulp more thoroughly.

[0065] In addition, in order to further improve the grinding effect, the grinding section 300B in this embodiment includes an outer flange 34 extending radially outward, as shown in FIG. Figure 1 or Figure 2As shown, in this embodiment, the extrusion screw 300 is a conical body with a gradually increasing outer diameter at the first extrusion section 300A, which is a commonly used design of the extrusion screw 300 at present. It can gradually reduce the gap between the extrusion screw 300 and the inner wall of the extrusion barrel 21, that is, gradually extrude from large to small, and the grinding section 300B in this embodiment has an obvious convex formation in the radial direction, forming a step-like shape, and the first toothed portion 33 is arranged on the outer flange 34. The advantages of this design are: first, it can play a role in buffering the feeding. At this stage, the pulp has basically been broken into small particles, and some will fall rapidly with the fluid. The design of this stepped outer flange 34 can effectively slow down the feeding speed, so that this part of the pulp can be fully ground in the grinding section 300B; second, the grinding is more thorough. In the first extrusion section 300A, the force on the fruits and vegetables is mostly from the horizontal lateral extrusion force, and there is a large extrusion space in the vertical direction. After being stressed, they may have a tendency to extrude downwards. When grinding on the outer flange 34, the fruits and vegetables are squeezed between the top of the outer flange 34 and the extrusion cylinder 21. The force on the fruits and vegetables is mostly from the extrusion force in the upper and lower directions. The lateral extrusion space is limited, resulting in that the fruits and vegetables can only be ground in this area. In this grinding method, the probability of missing the pulp from grinding is greatly reduced, making the grinding more thorough.

[0066] In order to allow the grinding part to smoothly discharge the material to the second extrusion section 300C while achieving the grinding effect, the top surface of the outer flange 34 in this embodiment includes an inclined surface, and the first tooth-shaped portion 33 is arranged on the inclined surface. The design of this inclined surface combines the functions of buffering discharge and more thorough grinding mentioned above, and also facilitates the smooth entry of the ground fruit puree into the second extrusion section 300C below. Preferably, the inclined surface of the top surface of the outer flange 34 has an inclination angle of 3° to 45° relative to the horizontal plane. If the inclination angle is too small, it is not conducive to the discharge of fruit puree. If the inclination angle is too large, the effect of buffering discharge will be affected. Generally, 10°, 15°, 20°, etc. can be selected. It should be noted that designing the top surface of the outer flange 34 as an inclined surface is a preferred solution. In other embodiments, the top surface of the outer flange 34 can also be a plane, that is, the guide thrust of the first extrusion section 300A is used to push the discharge.

[0067] like Figure 1As shown, in order to allow the fruit puree to be smoothly fed into the second extrusion section 300C, the extrusion screw 300 in this embodiment is provided with a circulation channel between the grinding section 300B and the second extrusion section 300C for fruits and vegetables to enter the second extrusion section 300C from the grinding section 300B. There can be many designs of such circulation channels. Taking this embodiment as an example, there are two types of circulation channels. The first channel is a notch 35 provided at the top of the outer flange 34, and the notch 35 extends all the way to the side of the outer flange 34, so that the fruit puree at the top of the outer flange 34 can enter the side of the outer flange 34 from the notch 35 and enter the second extrusion section 300C below. The second channel is provided at the side of the outer flange 34, wherein a plurality of spaced ribs 36 are provided on the side wall of the outer flange 34, and the adjacent spaced ribs 36 just form a second channel, and the fruit puree from the top of the outer flange 34 can enter the second extrusion section 300C through the second channel. Of course, as a preferred embodiment, the first channel and the second channel are also interconnected in this embodiment.

[0068] In order to further play the role of the segmented extrusion screw 300 in each stage, the grinding section 300B in this embodiment adopts a structure designed separately from the screw body 30, such as Figure 2 As shown, the screw body 30 is provided with a grinding sleeve 37 on the outside, and the grinding section 300B is provided on the grinding sleeve 37. The grinding sleeve 37 is a metal body. The conventional screw body 30 is currently formed by injection molding, and the grinding section 300B requires a greater grinding strength, so a metal body with better hardness is used, such as an alloy material, which is more wear-resistant and has a better grinding effect. For the assembly of the grinding sleeve 37 and the screw body 30, secondary injection molding can be used, or it can be fixed by manual assembly at a later stage. In this embodiment, secondary injection molding is preferred. It should be noted that in order to make the grinding sleeve 37 and the screw body 30 more stable, the grinding sleeve 37 in this embodiment also includes a part of the spiral ribs 31 of the first extrusion section 300A, so that the grinding sleeve 37 and the screw body 30 can have a larger fitting area and the probability of separation is reduced.

[0069] At the same time, the second extrusion section 300C in this embodiment also adopts a separate design structure from the screw body 30. Since the second extrusion section 300C mainly has a scraping and grinding function, the gap between the second convex rib 32 and the extrusion barrel 21 needs to be relatively small, almost to achieve a gapless or even interference fit effect. Corresponding to this working environment, it is preferred that the second convex rib 32 has a certain elastic deformation ability, so as to reduce the problem of material jamming during the scraping and grinding process. Therefore, in this embodiment, it is preferred that an extrusion sleeve 38 is sleeved on the outside of the screw body 30, and the second extrusion section 300C is located on the extrusion sleeve 38, so that the material of the extrusion sleeve 38 can be inconsistent with that of the screw body 30. In terms of specific materials, the extrusion sleeve 38 can be a soft body as a whole, that is, the second convex rib 32 and the extrusion sleeve 38 are made of a soft material. Of course, the extrusion sleeve 38 body can also be a hard body, and the second convex rib 32 can be designed as a soft body alone.

[0070] It should be noted that the grinding sleeve 37 and the extrusion sleeve 38 are only the preferred methods of this embodiment. In other implementations, they are not limited to this split structure. The grinding sleeve 37 and the extrusion sleeve 38 are designed to be integrally formed with the screw body 30, which also falls within the protection scope of the present invention.

[0071] In order to improve the slag removal effect, in this embodiment, the extrusion screw 300 further includes a slag removal rib 39 on the side of the second extrusion section 300C away from the feeding end, and the residue generated in the second extrusion section 300C is guided and discharged through the slag removal rib 39.

[0072] Embodiment 2:

[0073] like Figures 4 to 7 As shown, a juicer is shown. The juicer as a whole includes a main body 100, a feeding assembly 400 and an extrusion assembly 200. A driver is provided in the main body 100, and the driver is usually a motor and a reduction device. The extrusion assembly 200 includes an extrusion barrel 21 and an extrusion screw 300 at least partially provided in the extrusion barrel 21. The driver is connected to the extrusion screw 300 in a transmission manner so that the extrusion screw 300 rotates in the extrusion barrel 21. Taking this embodiment as an example, the main body 100 is located at the bottom, the output shaft of the driver extends out of the top of the main body 100, and the extrusion assembly 200 is installed at At the top of the main body 100, the feeding assembly 400 is installed above the extrusion assembly 200. Fruits and vegetables are put in from the feeding assembly 400 and extruded in the extrusion assembly 200. The extrusion assembly 200 also includes an outer cylinder 22 arranged outside the extrusion cylinder 21. The outer cylinder 22 is provided with a juice outlet 221. A liquid channel is formed between the outer cylinder 22 and the extrusion cylinder 21. The juice squeezed from the extrusion cylinder 21 flows out from the juice outlet 221 of the extrusion assembly 200, and the residue after squeezing is discharged from the residue outlet 222 of the extrusion assembly 200. The basic principle of this juicer can refer to the prior art and will not be elaborated on.

[0074] The extrusion screw 300 of the juicer in this embodiment is the segmented extrusion screw 300 described in the first embodiment, wherein in the extrusion assembly 200, the liquid and / or substance extruded from the fruits and vegetables through the first extrusion section 300A and the second extrusion section 300C are connected to the juice outlet 221, where the substance mainly refers to water-soluble fruit and vegetable fiber. The residue of the fruits and vegetables after being extruded between the extrusion barrel 21 and the second extrusion section 300C is discharged through the residue discharge port 222, and there is a flexible baffle 2221 between the residue discharge port 222 and the extrusion barrel 21.

[0075] like Figure 5 As shown, the extrusion cylinder 21 in this embodiment is provided with a first filter screen 211 and a second filter screen 212, respectively. The first filter screen 211 corresponds to the first extrusion section 300A, and the second filter screen 212 corresponds to the second extrusion section 300C, that is, when the fruits and vegetables are extruded in the first extrusion section 300A, the liquid flows into the juice outlet 221 mainly through the first filter screen 211, and when the fruits and vegetables are scraped in the second extrusion section 300C, the liquid and water-soluble fruit and vegetable fibers flow into the juice outlet 221 mainly through the second filter screen 212. In the design, since the fruits and vegetables are already close to the puree state in the second extrusion section 300C, in order to prevent larger residues from entering the juice outlet 221 through the second filter screen 212, the filter holes of the second filter screen 212 in this embodiment are smaller than or equal to the filter holes of the first filter screen 211, and the first filter screen 211 and the second filter screen 212 are both connected to the juice outlet 221.

[0076] Regarding the size parameters of the filter holes, the filter hole diameter of the first filter screen 211 ranges from 0.3 mm to 2 mm; preferably 1.2 mm, 1.5 mm, and 1.8 mm. It should be noted that the first filter screen 211 may not be limited to a single diameter, such as Figure 5 As shown, the first filter screen 211 in this embodiment includes two calibers of filter screens, namely, a first upper filter screen 211a and a first lower filter screen 211b. This is mainly because the extrusion screw 300 is a cone in the first extrusion section 300A, and its extrusion gap itself is gradual, so it can be matched with filter screens of different calibers for filtering. For example, the caliber of the first lower filter screen 211b can even be consistent with the caliber of the second filter screen 212. However, even if the caliber of the filter hole is consistent with the caliber of the second filter screen 212, there is still a difference in the matching gap. In the first extrusion section 300A, there is generally a large gap between the extrusion screw 300 and the first filter screen 211, and it will not be almost zero gap like the second extrusion section 300C, otherwise it will be very difficult to cut the material.

[0077] In this embodiment, the filter hole diameter range of the second filter 212 is 0.3mm-0.5mm, which is just suitable for fruit and vegetable fibers to pass through. If the diameter is too small, the fruit and vegetable fibers are not easy to pass through, and if the diameter is too large, some unnecessary residues will pass through. Generally, 0.3mm, 0.35mm, and 0.4mm are selected as appropriate.

[0078] As described above, in this embodiment, the extrusion gap between the first extrusion section 300A and the first filter 211 is larger than the extrusion gap between the second extrusion section 300C and the second filter 212. The extrusion gap referred to here is mainly the lateral distance between the ribs and the filter. In the first extrusion section 300A, the main function is crushing and extrusion, and at the same time, the fruits and vegetables must be guided downward, so the extrusion gap is usually not too small, otherwise it will be detrimental to feeding. In the second extrusion section 300C, it is basically small particles of pulp or puree. At this stage, feeding is no longer the main purpose, but to fully filter out the nutrients in the small particles of pulp or puree. Therefore, the extrusion gap between the second extrusion section 300C and the second filter 212 can be designed to be very small, almost zero gap, or even interference fit. In actual design, the second convex rib 32 and the second filter screen 212 are clearance-fitted, and the clearance is less than or equal to 0.5 mm. The specific clearance can be determined according to the elastic deformation ability of the second convex rib 32. If the elastic deformation ability is weak, the clearance can be appropriately selected as 0.5 mm, 0.4 mm, etc. If the elastic deformation ability is strong, it can be 0 mm or 0.1 mm, etc. Of course, even the second convex rib 32 can also be interference-fitted with the second filter screen 212.

[0079] At the same time, the matching relationship between the second extrusion section 300C and the second filter 212 can also make the rotation of the extrusion screw more stable. The rotation of the extrusion screw 300 is driven by the output shaft in the center. The outer peripheral side of the traditional extrusion screw will leave a gap with the extrusion barrel to ensure that the fruits and vegetables can be fed. This will inevitably cause the extrusion screw to shake during operation. In this embodiment, the matching relationship between the second extrusion section 300C and the second filter 212 is designed to be almost zero gap, or even interference fit, which is equivalent to positioning the outer ring of the extrusion screw 300, and the rotation stability is better. In particular, in the juicer of this embodiment, the extrusion screw 300 is an extrusion screw with a single bottom positioning and no top positioning. The shaking degree of this extrusion screw is greater than that of the extrusion screw with both top and bottom positioning. However, in this embodiment, it is precisely by utilizing the matching relationship between the second extrusion section and the second filter 212 that the shaking problem of the extrusion screw with a single bottom positioning is alleviated to a certain extent.

[0080] Similarly, in this embodiment, the outer flange 34 is provided with a spacer rib 36, which can also achieve a similar effect. In this embodiment, since the grinding section mainly grinds at the top of the outer flange 34, the gap between the spacer rib 36 located on the side and the inner wall of the extrusion barrel 21 can be set relatively small, which is equivalent to positioning the outer ring of the extrusion screw 300, and the rotation stability is better. Especially in this embodiment, the extrusion screw 300 is an extrusion screw with a single bottom positioning and no top positioning. The wobble of this extrusion screw is greater than that of an extrusion screw with double top and bottom positioning. However, in this embodiment, the design of the spacer rib 36 can also be used to alleviate the wobble problem of the extrusion screw with a single bottom positioning to a certain extent.

[0081] In this embodiment, in order to cooperate with the grinding section 300B of the extrusion screw 300, the inner wall of the extrusion barrel 21 is provided with a second tooth-shaped portion 213 matching the first tooth-shaped portion 33. The first tooth-shaped portion 33 and the second tooth-shaped portion 213 cooperate with each other to make the grinding more thorough. At the same time, the gap between adjacent teeth can just serve as a buffer to reduce the occurrence of material jamming. In addition, since the grinding section 300B of the extrusion screw 300 is specially designed with an outer flange 34, in this embodiment, the extrusion barrel 21 is provided with an outer convex ring 214 corresponding to the outer flange 34, and the second tooth-shaped portion 213 is arranged on the bottom wall of the outer convex ring 214. Therefore, during actual grinding, the fruits and vegetables are squeezed between the top of the outer flange 34 and the bottom wall of the outer convex ring 214, and the extrusion force they bear is basically mainly in the up and down direction. Compared with the lateral extrusion force, this grinding method is more thorough.

[0082] The extrusion gap between the first tooth-shaped portion 33 and the second tooth-shaped portion 213 is preferably 0.1 mm to 0.5 mm. The extrusion gap referred to here is the gap between the tooth tops of the first tooth-shaped portion 33 and the tooth tops of the second tooth-shaped portion 213. 0.1 mm and 0.2 mm are preferred.

[0083] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A segmented extrusion screw, characterized in that: include: a screw body, the screw body comprising a feed end; The outer peripheral side of the screw body is provided with a spiral rib for extruding or crushing fruits and vegetables at a side close to the feeding end, and the spiral rib forms a first extrusion section; The extrusion screw further comprises an independent second extrusion section, the second extrusion section is far away from the feed end, the second extrusion section comprises at least one second convex rib arranged on the outer peripheral side of the screw body, and the second convex rib is provided with a guiding surface for guiding the fruits and vegetables to be extruded in a radial direction; After the fruits and vegetables are squeezed and crushed in the first extrusion section, the remaining part enters the second extrusion section, and is squeezed into the second filter screen of the juicer under the guidance of the second convex ribs in the second extrusion section for scraping to form secondary filtration.

2. A segmented extrusion screw as claimed in claim 1, characterized in that: The guide surface is an inclined surface or an arc surface, and the guide surface is configured such that: along the rotation direction of the extrusion screw, the distance between the guide surface and the central axis gradually decreases.

3. A segmented extrusion screw as claimed in claim 1, characterized in that: The second convex ribs are distributed outside the screw body in an inclined shape relative to the axial direction.

4. A segmented extrusion screw as claimed in claim 1, characterized in that: The extrusion screw is further provided with a grinding section between the first extrusion section and the second extrusion section. The fruits and vegetables are extruded from the first extrusion section and then enter the grinding section. After being ground in the grinding section, they enter the second extrusion section.

5. A segmented extrusion screw as claimed in claim 4, characterized in that: The grinding section includes at least one first tooth portion arranged on the outer peripheral side of the screw body.

6. A segmented extrusion screw as claimed in claim 5, characterized in that: The grinding section comprises an outer flange extending radially outward, and the first tooth-shaped portion is arranged on the outer flange.

7. A segmented extrusion screw as claimed in claim 6, characterized in that: The top surface of the outer flange comprises an inclined surface, and the first tooth-shaped portion is arranged on the inclined surface.

8. A segmented extrusion screw as claimed in claim 4, characterized in that: The extrusion screw is provided with a flow channel between the grinding section and the second extrusion section for fruits and vegetables to flow from the grinding section into the second extrusion section.

9. A segmented extrusion screw as claimed in claim 4, characterized in that: The grinding section is an integral structure with the screw body; or, a grinding sleeve is sleeved on the outside of the screw body, the grinding sleeve includes the grinding section, and the grinding sleeve is a metal body.

10. The segmented extrusion screw according to claim 1, characterized in that: The second extrusion section is an integral structure with the screw body; or, an extrusion sleeve is sleeved outside the screw body, and the second extrusion section is located on the extrusion sleeve.

11. A segmented extrusion screw as claimed in claim 10, characterized in that: The extrusion sleeve is a soft body as a whole; or the second convex rib is a soft body.

12. A segmented extrusion screw as claimed in claim 1, characterized in that: The second convex rib is a soft body.

13. A segmented extrusion screw as claimed in claim 1, characterized in that: The extrusion screw further comprises a slag discharge rib on a side of the second extrusion section away from the feed end, and the residue generated in the second extrusion section is discharged through the guidance of the slag discharge rib.

14. A juicer, comprising a main body, a feeding assembly and an extrusion assembly, wherein the main body is provided with a driver, the extrusion assembly comprises an extrusion barrel and an extrusion screw at least partially provided in the extrusion barrel, the driver is drivingly connected to the extrusion screw so that the extrusion screw rotates in the extrusion barrel, characterized in that: The extrusion screw adopts the segmented extrusion screw according to any one of claims 1 to 13, and the extrusion assembly is provided with a juice outlet, and the liquid and / or substance extruded through the first extrusion section and the second extrusion section are connected to the juice outlet.

15. A juicer according to claim 14, characterized in that: The extrusion cylinder is provided with a first filter screen and a second filter screen respectively. The first filter screen corresponds to the first extrusion section, the second filter screen corresponds to the second extrusion section, the filter holes of the second filter screen are smaller than or equal to the filter holes of the first filter screen, and the first filter screen and the second filter screen are both connected to the juice outlet.

16. A juicer according to claim 15, characterized in that: The filter pore size range of the first filter is 0.3mm-2mm; and / or the filter pore size range of the second filter is 0.3mm-0.5mm.

17. A juicer according to claim 15, characterized in that: The extrusion gap between the first extrusion section and the first filter screen is larger than the extrusion gap between the second extrusion section and the second filter screen.

18. The juice machine according to claim 15, characterized in that: The second rib and the second filter screen are clearance-fitted, and the clearance is less than or equal to 0.5 mm; or, the second rib is a soft body, and the second rib and the second filter screen are interference-fitted.

19. The juice machine according to claim 14, characterized in that: The extrusion screw is also provided with a grinding section between the first extrusion section and the second extrusion section. After being extruded from the first extrusion section, the fruits and vegetables enter the grinding section, and after being ground by the grinding section, they enter the second extrusion section. The grinding section includes at least one first tooth-shaped portion arranged on the outer peripheral side of the screw body, and a second tooth-shaped portion matching the first tooth-shaped portion is provided on the inner wall of the extrusion barrel.

20. A juicer according to claim 19, characterized in that: The grinding section comprises an outer flange formed by radially extending the screw body outward, the first tooth-shaped portion is arranged on the outer flange, and the extrusion cylinder is provided with an outer convex ring at a position corresponding to the outer flange.

21. The juicer according to claim 19, characterized in that: The top surface of the outer flange comprises an inclined surface, the first tooth-shaped portion is arranged on the inclined surface, and a second tooth-shaped portion is arranged on the inner wall of the outer convex ring at a position corresponding to the first tooth-shaped portion.

22. A juicer according to claim 21, characterized in that: The extrusion gap between the first tooth-shaped portion and the second tooth-shaped portion is 0.1 mm to 0.5 mm.

23. The juicer according to claim 14, characterized in that: The extrusion assembly also includes an outer cylinder body arranged outside the extrusion cylinder, the juice outlet is arranged on the outer cylinder body, a liquid channel is formed between the outer cylinder body and the extrusion cylinder, and the liquid and / or substance extruded through the first extrusion section and the second extrusion section enters the liquid channel.

24. A juicer according to claim 23, characterized in that: The outer cylinder is provided with a residue discharge port, and the residues after the fruits and vegetables are squeezed between the extrusion cylinder and the second extrusion section are discharged through the residue discharge port.

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