Sectional type extrusion screw rod and normal juice machine

Abstract

The utility model discloses a sectional type extrusion screw rod, which belongs to the field of food processing equipment and comprises a screw rod main body, and the screw rod main 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 utility model further discloses a juicer adopting the sectional type extrusion screw, and the juicer has the advantages that the nutrition of fruit juice extracted by the juicer is improved, and meanwhile, the juice yield is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to a segmented extrusion screw and a juice extractor, and belongs to the field of food processing equipment. BACKGROUND

[0002] With the progress of science and technology and the improvement of living standards, juice extractors or juicers are becoming more and more popular. The main structure of a juice extractor or a juicer mainly includes a main body and a juicing assembly connected to the main body. The juicing assembly usually includes an extrusion screw and an extrusion cylinder. The principle is that the extrusion screw rotates in the extrusion cylinder, so that the fruits and vegetables to be extruded are extruded between the extrusion screw and the extrusion cylinder to form liquid.

[0003] However, the current traditional extrusion screw usually has a crushing and extruding step after the fruits and vegetables enter the feeding end in large pieces, and the small particle flesh is further ground by a grinding layer. Then the fruit residue is discharged through the residue outlet, and the juicing process is completed. The current structure of the juice extractor causes a large amount of fruit juice and nutrients to be discharged with the residue, resulting in a large amount of material and nutrient waste. SUMMARY

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

[0005] To solve the above technical problems, the present application adopts the following technical scheme:

[0006] A segmented extrusion screw, comprising:

[0007] A screw body, the screw body comprising a feeding end;

[0008] The outer periphery of the screw body is provided with a spiral rib for extruding or crushing fruits and vegetables near 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 being away from the feeding end, the second extrusion section comprising at least one second rib provided on the outer periphery of the screw body, and the second rib being provided with a guide surface for guiding the fruits and vegetables to be extruded in the radial direction;

[0010] After the fruits and vegetables are crushed and extruded by the first extrusion section, the residual part enters the second extrusion section, and the residual part is extruded to the second filter screen of the juice extractor under the guidance of the second rib in the second extrusion section to form secondary filtration.

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

[0012] In the present application, the extrusion screw is designed in a segmented manner, the first extrusion segment is mainly used for crushing the large pieces of pulp, and the juice extracted in the first extrusion segment is usually the most, but the extracted part is basically liquid, because the pulp has not been completely crushed at this stage, and most of the liquid is extracted. With the pulp passing through the first extrusion segment, the large pieces of pulp are gradually cut and crushed into small particles, and a large amount of water-soluble fruit and vegetable fibers that can be digested and absorbed by the human body exist in the pulp. In the present application, the extrusion screw is specially provided with a separate second extrusion segment, at least one second rib is arranged in the second extrusion segment, a guide surface for guiding the fruit and vegetable to be extruded in the radial direction is arranged on the second rib, and the residual part of the pulp is scraped and ground in the second extrusion segment under the guidance of the second rib to the second filter screen of the juicer. The function of the second extrusion segment is mainly scraping and grinding, and in this process, whether it is liquid or water-soluble fruit and vegetable fibers, most of them will be extruded into the second filter screen in this way. By means of scraping and grinding, secondary filtration is formed.

[0013] By adopting the extrusion screw of the present application, the pulp can be extruded in a segmented manner, especially the second extrusion segment, which not only further extrudes the juice liquid, but also further extrudes and filters some water-soluble fruit and vegetable fibers, thereby improving the nutritional ingredients in the extracted juice and increasing the juice yield.

[0014] As a preferred, the guide surface is an inclined surface or an arc surface, and the guide surface is configured to gradually decrease in distance from the central axis in the rotation direction of the extrusion screw.

[0015] As a preferred, the second rib is distributed in an inclined manner outside the screw body relative to the axial direction.

[0016] As a preferred, the extrusion screw is further provided with a grinding segment between the first extrusion segment and the second extrusion segment, the fruit and vegetable is extruded from the first extrusion segment and enters the grinding segment, and after being ground in the grinding segment, the fruit and vegetable enters the second extrusion segment.

[0017] As a preferred, the grinding segment includes at least one first tooth-shaped part arranged on the outer circumferential side of the screw body.

[0018] As a preferred, the grinding segment includes an outer flange extending radially outward, and the first tooth-shaped part is arranged on the outer flange.

[0019] As a preferred, the top surface of the outer flange includes an inclined surface, and the first tooth-shaped part is arranged on the inclined surface.

[0020] As a preferred, the extrusion screw is provided with a flow channel between the grinding segment and the second extrusion segment for the fruit and vegetable to flow from the grinding segment to the second extrusion segment.

[0021] As preferred, the grinding section is integrated with the screw body; or, a grinding sleeve is externally sleeved on the screw body, the grinding sleeve comprises the grinding section, and the grinding sleeve is a metal body.

[0022] As preferred, the second extruding section is integrated with the screw body; or, an extruding sleeve is externally sleeved on the screw body, and the second extruding section is located on the extruding sleeve.

[0023] As preferred, the extruding sleeve is a soft body as a whole; or, the second convex rib is a soft body.

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

[0025] As preferred, the extruding screw further comprises a residue discharging convex rib on the side of the second extruding section away from the feeding end, and the residue generated in the second extruding section is guided to be discharged through the residue discharging convex rib.

[0026] In addition, the application further discloses a juicer, which comprises a main body, a feeding assembly and an extruding assembly, the main body is internally provided with a driver, the extruding assembly comprises an extruding cylinder and an extruding screw at least partially arranged in the extruding cylinder, the driver is in transmission connection with the extruding screw to enable the extruding screw to rotate in the extruding cylinder, the extruding screw adopts the sectional extruding screw in any one of the above-mentioned schemes, the extruding assembly is provided with a juice outlet, and the liquid and / or substance extruded through the first extruding section and the second extruding section are all communicated to the juice outlet.

[0027] As preferred, the extruding cylinder is respectively provided with a first filter screen and a second filter screen, the first filter screen corresponds to the first extruding section, the second filter screen corresponds to the second extruding section, the filter hole of the second filter screen is smaller than or equal to that of the first filter screen, and the first filter screen and the second filter screen are both in communication with the juice outlet.

[0028] As preferred, the filter hole of the first filter screen ranges from 0.3 mm to 2 mm in diameter; and / or, the filter hole of the second filter screen ranges from 0.3 mm to 0.5 mm in diameter.

[0029] As preferred, the extruding gap between the first extruding section and the first filter screen is greater than the extruding gap between the second extruding section and the second filter screen.

[0030] As preferred, the second convex rib is in clearance fit with the second filter screen, and the clearance is less than or equal to 0.5 mm; or, the second convex rib is a soft body, and the second convex rib is in interference fit with the second filter screen.

[0031] As preferred, the extrusion screw is further provided with a grinding section between the first extrusion section and the second extrusion section, the fruit and vegetable is extruded from the first extrusion section and then enters the grinding section, and is ground in the grinding section and then enters the second extrusion section, the grinding section comprises at least one first toothed part provided on the outer circumferential side of the screw body, and the inner wall of the extrusion barrel is provided with a second toothed part matched with the first toothed part.

[0032] As preferred, the grinding section comprises an outer flange formed by extending radially outwardly from the screw body, the first toothed part is provided on the outer flange, and the extrusion barrel is provided with an outer flange ring corresponding to the outer flange.

[0033] As preferred, the top surface of the outer flange comprises an inclined surface, the first toothed part is provided on the inclined surface, and the inner wall of the outer flange ring is provided with a second toothed part corresponding to the position of the first toothed part.

[0034] As preferred, the gap between the first toothed part and the second toothed part is 0.1mm-0.5mm.

[0035] As preferred, the extrusion assembly further comprises an outer barrel body provided outside the extrusion barrel, the juice outlet is arranged on the outer barrel body, and a liquid channel is formed between the outer barrel body and the extrusion barrel, and the liquid and / or substance extruded from the first extrusion section and the second extrusion section enters the liquid channel.

[0036] As preferred, the outer barrel body is provided with a residue outlet, and the residue of the fruit and vegetable extruded between the extrusion barrel and the second extrusion section is discharged through the residue outlet.

[0037] The features and advantages of the present application will be described in detail in the following specific embodiments, drawings.

DRAWINGS

[0038] The present application will be further described in combination with the drawings below:

[0039] Figure 1 It is a structure schematic view of the extrusion screw of the first embodiment of the present application;

[0040] Figure 2 It is an explosion schematic view of the extrusion screw of the first embodiment of the present application;

[0041] Figure 3 It is Figure 1 It is a local enlarged schematic view of A in FIG. 8;

[0042] Figure 4 It is a whole schematic view of the juicer of the second embodiment of the present application;

[0043] Figure 5 It is an exploded schematic view of the juicer of the second embodiment of the present application;

[0044] Figure 6 Figure 2 is a cross-sectional view of the extrusion assembly and the feeding assembly in the second embodiment of the present application;

[0045] Figure 7 Figure 3 is a cross-sectional view of the extrusion screw and the extrusion cylinder in the second embodiment of the present application.

DETAILED DESCRIPTION

[0046] The technical solutions of the embodiments of the present application are explained and described below in combination with the drawings of the embodiments of the present application. However, the following embodiments are only preferred embodiments of the present application, and not all. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without making creative efforts are within the protection scope of the present application.

[0047] In the following description, the terms such as "inner", "outer", "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, are only for the convenience of describing the embodiments and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0048] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "fixing", and the like should be understood in a broad sense, for example, can be fixed connection, or detachable connection, or integrated; can be directly connected, or indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements. However, it is noted that direct connection means that the connection between the two main bodies does not form a connection relationship through an excessive structure, but is connected only through a connection structure to form an integral whole. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0049] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can 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 the present specification, the description referring to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Embodiment I:

[0051] As Figures 1 to 3As shown, a segmented extrusion screw 300 is shown, which is mainly used for fruit and vegetable extrusion in a juicer. The segmented extrusion screw 300 in the embodiment is mainly used in a vertical juicer. The embodiment specifically includes: a screw body 30, which includes a feed end, so that Figure 1 For example, the feed end is the top end of the screw body 30, and the fruit and vegetable mainly enters from the feed end and is gradually extruded by the extrusion screw 300.

[0052] The outer circumferential side of the screw body 30 is provided with a spiral rib 31 for extruding or crushing fruit and vegetable near the feed end side, and the spiral rib 31 forms a first extrusion section 300A. For the first extrusion section 300A, it is a structure that most of the current juicer extrusion screws 300 have. The spiral rib 31 is mainly used to extrude the fruit and vegetable just entering, and the spiral design also plays a role in gradually guiding the fruit and vegetable downward. In the juicer, the extrusion gap between the first extrusion section 300A and the inner wall of the extrusion cylinder 21 is relatively large, which helps the large fruit meat to enter.

[0053] The extrusion screw 300 also includes a second extrusion section 300C, which is away from the feed end, and also Figure 1 For example, the second extrusion section 300C is already close to the bottom position of the extrusion screw 300. The second extrusion section 300C includes at least one second rib 32 provided on the outer circumferential side of the screw body 30, and the second rib 32 is provided with a guide surface 321 for guiding the fruit and vegetable to be extruded in the radial direction. After the fruit and vegetable is crushed by the first extrusion section 300A, the remaining part enters the second extrusion section 300C, and the remaining part is guided by the second rib 32 in the second extrusion section 300C to be extruded to the second filter screen 212 of the juicer for scraping and grinding to form secondary filtration.

[0054] In the embodiment, the extrusion screw 300 is designed in a segmented manner. The first extrusion section 300A is mainly used for extruding and crushing the large fruit meat of the feed, and further guiding the fruit meat downward. The fruit juice extruded by the first extrusion section 300A is usually the most, but this part of the extrusion is basically pure liquid, because the fruit meat has not been completely crushed at this stage, and most of it is to extrude the liquid in the fruit and vegetable.

[0055] As the fruit pulp passes through the first extrusion section 300A, large pieces of pulp are gradually cut and broken into small particles. These small particles contain a large amount of water-soluble fruit and vegetable fiber that is easily digested and absorbed by the human body. In this embodiment, the extrusion screw 300 is specially equipped with a separate second extrusion section 300C. This second extrusion section 300C has at least one second rib 32, and the second rib 32 has a guide surface 321 that guides the fruit and vegetables to be extruded radially. The remaining portion of the fruit pulp is contained within the second rib 32 in the second extrusion section 300C. Under guidance, the fruit and vegetables are squeezed into the second filter 212 of the juicer for scraping. Unlike the first extrusion section 300A, which mainly guides the fruit and vegetables downward during the extrusion process, the second extrusion section 300C mainly scrapes in the radial direction. During this scraping process, since the second rib 32 has a radially outward guiding surface 321, most of the liquid or water-soluble fruit and vegetable fibers will be squeezed into the second filter 212 by this scraping method and seep out, thus forming secondary filtration.

[0056] Using this type of extrusion screw 300, the pulp can be extruded in stages. In particular, the second extrusion stage 300C not only further squeezes out the juice liquid, but also further squeezes and filters out some water-soluble fruit and vegetable fibers, thereby improving the nutritional content of the juice and increasing the juice yield.

[0057] Regarding the specific structure of guide surface 321, as follows: 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 the distance between the guide surface 321 and the central axis gradually decreases along the rotation direction of the extrusion screw 300. Figure 3 For example, the arrow indicates the direction of rotation of the extrusion screw 300. Along this rotation direction, the guide surface 321 becomes increasingly closer to the circumferential side of the extrusion screw 300. When fruit and vegetable residue comes into contact with the guide surface 321, it will converge radially outward along the guide surface 321 and be extruded from the second filter screen 212.

[0058] For the layout or extension direction of the second rib 32, refer to the same. Figures 1 to 3The second protruding ribs 32 are inclinedly distributed outside the screw body 30 relative to the axial direction, which is the axial direction of the rotation center axis of the extrusion screw 300, i.e., the second protruding ribs 32 are not parallel to the axial direction, and the second protruding ribs 32 are inclinedly intersected with the center axis as viewed from the side. The inclined design of the second protruding ribs 32 reduces the resistance in the scraping process, and relative to the vertical design, the inclined design can prevent the fruit and vegetable residues from immediately sliding to the residue discharge port 222, but increase a buffering function, so that the scraping time is longer, and the residue discharge is more smooth, and the residues are not excessively concentrated in a certain position.

[0059] It should be noted that in other embodiments, the second protruding ribs 32 are not limited to the inclined design, but can also be a vertical design.

[0060] In order to better extrude the fruit and vegetable fibers in the second extrusion section 300C, in the 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. The fruit and vegetable is extruded from the first extrusion section 300A and then enters the grinding section 300B, and after being ground in the grinding section 300B, enters the second extrusion section 300C. The main function of the grinding section 300B is to further grind the small particle flesh into puree, which is closer to a fluid form, and cooperates with the scraping of the second extrusion section 300C, so that the scraping effect is better, thereby increasing the output rate of the fruit juice and the fruit and vegetable fibers of the second extrusion section 300C.

[0061] The extrusion screw 300 in the embodiment substantially realizes a three-stage juicing process, i.e., from the initial crushing extrusion, to the finer small particle flesh grinding extrusion, to the final puree scraping, which cooperates with each other to achieve the purpose of improving the juice output and the juice nutrition.

[0062] As shown in Figure 1 or Figure 3 In the embodiment, the grinding section 300B includes at least one first toothed portion 33 arranged on the outer circumferential side of the screw body 30. In the embodiment, the plurality of first toothed portions 33 are uniformly distributed in the circumferential direction, and the whole is similar to a toothed disc. The toothed disc type grinding method is more thorough than the spiral protruding ribs 31 in the first extrusion section 300A for crushing the flesh.

[0063] In addition, in order to further improve the grinding effect, the grinding section 300B in the embodiment includes an outer flange 34 extending radially outward, which can be seen from Figure 1 or Figure 2As shown, in this embodiment, the extrusion screw 300 is a tapered body with a gradually increasing outer diameter at the first extrusion section 300A. This is a commonly used design for extrusion screws 300, which allows the gap between the extrusion screw 300 and the inner wall of the extrusion cylinder 21 to gradually decrease, i.e., extrusion from large to small. In this embodiment, the grinding section 300B has a significant outward convexity in the radial direction, forming a step-like shape, and the first toothed portion 33 is provided on the outward flange 34. The advantages of this design are as follows: First, it can buffer the feeding process. At this stage, the fruit pulp has been basically broken into small particles, and some of it will fall rapidly with the fluid. The stepped outer flange 34 can effectively slow down the feeding speed, allowing this part of the fruit pulp to be fully ground in the grinding section 300B. Second, the grinding is more thorough. In the first extrusion section 300A, the fruit and vegetables are mostly subjected to horizontal lateral extrusion force, and there is a large extrusion space in the vertical direction. After being subjected to force, they may tend to be extruded downwards. However, when grinding is carried out on the outer flange 34, the fruit and vegetables are squeezed between the top of the outer flange 34 and the extrusion cylinder 21. The fruit and vegetables are mostly subjected to vertical extrusion force, and their lateral extrusion space is limited, which means that the fruit and vegetables can only be ground in this area. This grinding method greatly reduces the chance of fruit pulp being missed in grinding, making the grinding more thorough.

[0064] To ensure smooth material feeding into the second extrusion section 300C while simultaneously achieving effective grinding, the top surface of the outer flange 34 in this embodiment includes an inclined surface, with the first toothed portion 33 disposed on this inclined surface. This inclined surface design serves the purposes of buffering material feeding and ensuring more thorough grinding, as mentioned above, while also facilitating the smooth flow of the ground fruit puree into the lower second extrusion section 300C. Preferably, the inclination angle of the top surface of the outer flange 34 relative to the horizontal plane is between 3° and 45°. If the inclination angle is too small, it will hinder the feeding of the fruit puree; if the inclination angle is too large, the buffering effect will be affected. Typically, angles of 10°, 15°, and 20° are selected. It should be noted that designing the top surface of the outer flange 34 as an inclined surface is the preferred solution. In other embodiments, the top surface of the outer flange 34 can also be a plane, i.e., the material is pushed out using the guiding thrust of the first extrusion section 300A.

[0065] like Figure 1As shown, in order to let the puree smoothly discharged to the second extrusion section 300C, the extrusion screw 300 in the embodiment is provided with a flow-through channel for the fruits and vegetables from the grinding section 300B to enter the second extrusion section 300C between the grinding section 300B and the second extrusion section 300C. The design of such a flow-through channel can be many, for example, in the embodiment, the flow-through channel includes two kinds, the first channel is a notch 35 provided at the top of the outer flange 34, which extends to the side of the outer flange 34, so that the puree at the top of the outer flange 34 can enter the side of the outer flange 34 to enter the second extrusion section 300C below, and the second channel is provided at the side of the outer flange 34, wherein the side wall of the outer flange 34 is provided with a plurality of spaced ribs 36, and the second channel is formed between adjacent spaced ribs 36, and the puree at the top of the outer flange 34 can enter the second extrusion section 300C through the second channel, and of course, as preferred, the first channel and the second channel are also connected to each other in the embodiment.

[0066] In order to further exert the effect of the segmented extrusion screw 300 in each stage, the grinding section 300B in the embodiment is designed in a structure separate from the screw body 30, as shown in Figure 2 As shown, the screw body 30 is externally sleeved with a grinding sleeve 37, and the grinding section 300B is arranged on the grinding sleeve 37, the grinding sleeve 37 is a metal body, and the conventional screw body 30 is formed by injection molding, while the grinding section 300B needs to have greater grinding strength, so a metal body with better hardness, such as an alloy material, is used to make it more wear-resistant and have better grinding effect, and the grinding sleeve 37 and the screw body 30 can be assembled by secondary injection molding or by manual assembly and fixation, and in the embodiment, the preferred method is secondary injection molding. It should be noted that in order to make the grinding sleeve 37 and the screw body 30 cooperate more stably, the grinding sleeve 37 in the embodiment also includes part of the helical ribs 31 of the first extrusion section 300A, so that the grinding sleeve 37 and the screw body 30 have a larger area of adhesion, and the probability of disengagement is reduced.

[0067] Meanwhile, in this embodiment, the second extrusion section 300C also adopts a separate design structure from the screw body 30. Since the second extrusion section 300C mainly performs scraping, the gap between the second rib 32 and the extrusion cylinder 21 needs to be relatively small, almost to achieve zero gap, or even an interference fit effect. Corresponding to this working environment, it is preferred that the second rib 32 has a certain elastic deformation capability, so as to reduce the problem of material jamming during the scraping process. Therefore, in this embodiment, it is preferable that the screw body 30 is fitted with an extrusion sleeve 38, and the second extrusion section 300C is located on the extrusion sleeve 38, so that the material of the extrusion sleeve 38 can be different from 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 rib 32 and the extrusion sleeve 38 are made of a soft material. Of course, the body of the extrusion sleeve 38 can also be a hard body, and the second rib 32 can be designed as a soft body separately.

[0068] It should be noted that the grinding sleeve 37 and the extrusion sleeve 38 are merely preferred embodiments in this case. In other embodiments, they are not limited to this split structure. Designing the grinding sleeve 37 and the extrusion sleeve 38 as integrally formed with the screw body 30 also falls within the protection scope of this invention.

[0069] To improve the slag removal effect, in this embodiment, the extrusion screw 300 also includes a slag removal rib 39 on the side of the second extrusion section 300C away from the feed end, and the residue generated in the second extrusion section 300C is guided out by the slag removal rib 39.

[0070] Example 2:

[0071] like Figures 4 to 7 The illustration shows a juicer, which includes a main body 100, a feeding assembly 400, and a pressing assembly 200. The main body 100 houses a driver, typically a motor and a reduction gear. The pressing assembly 200 includes a pressing cylinder 21 and a pressing screw 300 at least partially disposed within the pressing cylinder 21. The driver is kinetically connected to the pressing screw 300, causing the pressing screw 300 to rotate within the pressing cylinder 21. In this embodiment, the main body 100 is located at the bottom, the output shaft of the driver extends from the top of the main body 100, and the pressing assembly 200 is mounted on... At the top of the main body 100, the feeding component 400 is installed above the extrusion component 200. Fruits and vegetables are fed into the feeding component 400 and squeezed inside the extrusion component 200. The extrusion component 200 also includes an outer cylinder 22 located 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 out from the extrusion cylinder 21 flows out from the juice outlet 221 of the extrusion component 200, and the residue after extrusion is discharged from the residue discharge port 222 of the extrusion component 200. The basic principle of this juicer can be referred to the existing technology, and will not be elaborated here.

[0072] In this embodiment of the juicer, the extrusion screw 300 is the segmented extrusion screw 300 described in Embodiment 1. Within the extrusion assembly 200, the liquid and / or substances extruded from the fruits and vegetables through the first extrusion section 300A and the second extrusion section 300C are both connected to the juice outlet 221. The substances referred to here mainly refer to water-soluble fruit and vegetable fibers. The residue from the extrusion between the extrusion cylinder 21 and the second extrusion section 300C is discharged through the residue discharge port 222. A flexible baffle 2221 is located between the residue discharge port 222 and the extrusion cylinder 21.

[0073] like Figure 5 As shown, in this embodiment, the extrusion cylinder 21 is provided with a first filter screen 211 and a second filter screen 212. 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 mainly flows into the juice outlet 221 through the first filter screen 211. When the fruits and vegetables are scraped in the second extrusion section 300C, the liquid and water-soluble fruit and vegetable fibers mainly flow into the juice outlet 221 through the second filter screen 212. In the design, since the fruits and vegetables are already close to a puree state in the second extrusion section 300C, in order to avoid larger residues also 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. Both the first filter screen 211 and the second filter screen 212 are connected to the juice outlet 221.

[0074] Regarding the size parameters of the filter pores, the pore diameter of the first filter screen 211 ranges from 0.3mm to 2mm; preferably 1.2mm, 1.5mm, or 1.8mm. It should be noted that the first filter screen 211 is not limited to a single pore diameter, such as... Figure 5 As shown, the first filter screen 211 in this embodiment includes two types of filter screens with different diameters, namely the first upper filter screen 211a and the first lower filter screen 211b. This is mainly because the extrusion screw 300 is conical in the first extrusion section 300A, and its extrusion gap is progressive. Therefore, it can be used with filter screens of different diameters for filtration. For example, the diameter of the first lower filter screen 211b can even be the same as that of the second filter screen 212. However, even if the filter hole diameter is the same as that of the second filter screen 212, there is still a difference in the fitting gap. In the first extrusion section 300A, there is generally a large gap between the extrusion screw 300 and the first filter screen 211, rather than an almost zero gap fit like in the second extrusion section 300C. Otherwise, feeding would be very difficult.

[0075] In the embodiment, the filter hole aperture of the second filter screen 212 is 0.3mm-0.5mm, which is just suitable for the fruit and vegetable fibers to pass through. If the aperture is too small, the fruit and vegetable fibers are not easy to pass through, and if the aperture is too large, some unnecessary residues will pass through. Usually, 0.3mm, 0.35mm, 0.4mm are appropriate.

[0076] As described above, in the embodiment, the extrusion gap between the first extrusion section 300A and the first filter screen 211 is larger than the extrusion gap between the second extrusion section 300C and the second filter screen 212. The extrusion gap referred to here is mainly the transverse distance between the ribs and the filter screen. In the first extrusion section 300A, the main function is to crush and extrude, and at the same time to guide the fruit and vegetables downward, so the extrusion gap usually cannot be too small, otherwise it will not be conducive to the feeding. In the second extrusion section 300C, it is basically small particles of fruit pulp or fruit paste. At this stage, the feeding is not the most important purpose, but to fully filter out the nutritional ingredients in the small particles of fruit pulp or fruit paste. Therefore, the extrusion gap between the second extrusion section 300C and the second filter screen 212 can be designed to be very small, almost zero gap, or even interference fit. In actual design, the second rib 32 and the second filter screen 212 are gap fit, the gap is less than or equal to 0.5mm. Specifically, it can be determined according to the elastic deformation ability of the second rib 32. If the elastic deformation ability is weak, the gap can be appropriately selected as 0.5mm, 0.4mm, etc. If the elastic deformation ability is strong, it can be 0mm or 0.1mm, etc. Of course, the second rib 32 can also be interference fit with the second filter screen 212.

[0077] At the same time, the cooperation between the second extrusion section 300C and the second filter screen 212 can also make the extrusion screw rotate more stably. The rotation of the extrusion screw 300 is driven by the central output shaft. The traditional extrusion screw is usually left with a gap between the outer periphery and the extrusion cylinder to ensure that the fruit and vegetables can be fed. This inevitably causes the extrusion screw to shake to some extent during operation. In the embodiment, the cooperation between the second extrusion section 300C and the second filter screen 212 is designed to be almost zero gap or even interference fit, which is equivalent to positioning the extrusion screw 300 from the outside, and the rotation is more stable. Especially in the embodiment, the juicer uses an extrusion screw that is positioned at the bottom and not at the top. The shaking degree of this extrusion screw is greater than that of the extrusion screw that is positioned at the top and the bottom. However, in the embodiment, the cooperation between the second extrusion section and the second filter screen 212 to some extent reduces the shaking degree of the extrusion screw that is positioned at the bottom alone.

[0078] Similarly, the outer flange 34 in the embodiment is provided with the spacing ribs 36, which can also have similar effects. In the embodiment, since the main grinding of the grinding section is on the top of the outer flange 34, the gap between the spacing ribs 36 on the side and the inner wall of the extrusion cylinder 21 can be relatively small, which is equivalent to positioning the extrusion screw 300 from the outside, and the rotation stability is better. In particular, in the embodiment, the extrusion screw 300 is a single bottom positioning and top non-positioning extrusion screw, and the shaking degree of such an extrusion screw is greater than that of a top and bottom double-positioning extrusion screw. However, in the embodiment, the design of the spacing ribs 36 can also reduce the shaking degree of the single bottom positioning extrusion screw to a certain extent.

[0079] In the embodiment, in order to cooperate with the grinding section 300B of the extrusion screw 300, the inner wall of the extrusion cylinder 21 is provided with a second toothed portion 213 matched with the first toothed portion 33. The first toothed portion 33 and the second toothed portion 213 cooperate with each other to allow more thorough grinding, and the gap between adjacent teeth can serve as a buffer to reduce the occurrence of material jamming. In addition, since the outer flange 34 is specially designed for the grinding section 300B of the extrusion screw 300, the extrusion cylinder 21 in the embodiment is provided with an outer flange 214 corresponding to the outer flange 34, and the second toothed portion 213 is arranged on the bottom wall of the outer flange 214. Therefore, during actual grinding, the fruits and vegetables are extruded between the top of the outer flange 34 and the bottom wall of the outer flange 214, and the extrusion force they bear is mainly in the upward and downward directions, which is more thorough than the lateral extrusion force.

[0080] The extrusion gap between the first toothed portion 33 and the second toothed portion 213 is preferably 0.1mm-0.5mm. The extrusion gap referred to herein is the gap between the tooth top of the first toothed portion 33 and the tooth top of the second toothed portion 213. The values of 0.1mm and 0.2mm are preferred.

[0081] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Those skilled in the art should understand that the present application includes but is not limited to the contents described in the above specific embodiments and the drawings. Any modification that does not deviate from the functional and structural principles of the present application shall be included in the scope of the claims.

Claims

1. A segmented extrusion screw characterized by, Comprising: a screw body comprising a feeding end; a helical rib for extruding or crushing fruits and vegetables is arranged on the outer circumferential side of the screw body near the feeding end, and the helical rib forms a first extrusion section; the extrusion screw further comprises a separate second extrusion section away from the feeding end, and the second extrusion section comprises at least one second rib arranged on the outer circumferential side of the screw body, and a guide surface for guiding the fruits and vegetables to be extruded in the radial direction is arranged on the second rib; after the fruits and vegetables are crushed by the first extrusion section, the residual parts enter the second extrusion section again, and the residual parts are extruded under the guidance of the second rib in the second extrusion section to be scraped and ground by the second filter screen of the juicer 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 to gradually decrease in distance from the central axis in the direction of rotation of the extrusion screw.

3. A segmented extrusion screw as claimed in claim 1, characterized in that: The second rib is arranged on the outer circumferential side of the screw body in an inclined manner with respect to the axial direction.

4. A segmented extrusion screw as claimed in claim 1, characterized in that: The extrusion screw further comprises 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.

5. A segmented extrusion screw as claimed in claim 4, characterized in that: The grinding section comprises at least one first tooth-shaped part arranged on the outer circumferential 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 part 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 part 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 the fruits and vegetables to enter the second extrusion section from the grinding section.

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

10. A segmented extrusion screw as claimed in claim 1, characterized in that: The second extrusion section is in an integral structure with the screw body; or, an extrusion sleeve is arranged 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 rib is a soft body.

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

13. A segmented extrusion screw as claimed in claim 1, characterized in that: The extrusion screw further comprises a residue discharge rib on the side of the second extrusion section away from the feeding end, and the residue generated in the second extrusion section is guided to be discharged by the residue discharge rib.

14. A juicer comprising a main body, a feeding assembly and an extruding assembly, a driver is arranged in the main body, the extruding assembly comprises an extruding cylinder and an extruding screw arranged at least partially in the extruding cylinder, the driver is in driving connection with the extruding screw to rotate the extruding screw in the extruding cylinder, 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 liquids and / or substances extruded from the first extrusion section and the second extrusion section are all communicated to the juice outlet.

15. A juicer as claimed in claim 14, wherein: The extrusion cylinder is respectively provided with a first filter screen and a second filter screen, the first filter screen corresponds to the first extrusion section, the second filter screen corresponds to the second extrusion section, the filter hole of the second filter screen is smaller than or equal to the filter hole of the first filter screen, and the first filter screen and the second filter screen are both communicated with the juice outlet.

16. A juicer as claimed in claim 15, wherein: The filter hole of the first filter screen has a diameter range of 0.3mm-2mm; and / or, the filter hole of the second filter screen has a diameter range of 0.3mm-0.5mm.

17. A juicer as claimed in claim 15, wherein: The extrusion gap between the first extrusion section and the first filter screen is greater than the extrusion gap between the second extrusion section and the second filter screen.

18. A juicer as claimed in claim 15, wherein: The second convex rib is in clearance fit with the second filter screen, and the clearance is less than or equal to 0.5 mm; or the second convex rib is a soft body, and the second convex rib is in interference fit with the second filter screen.

19. A juicer as claimed in claim 14, wherein: The extrusion screw is further provided with a grinding section between the first extrusion section and the second extrusion section, the fruit and vegetable is extruded from the first extrusion section and then enters the grinding section, and then enters the second extrusion section after being ground in the grinding section, the grinding section comprises at least one first toothed part arranged on the outer circumferential side of the screw body, and the inner wall of the extrusion cylinder is provided with a second toothed part matched with the first toothed part.

20. A juicer as claimed in claim 19, wherein: The grinding section comprises an outer flange formed by the screw body extending radially outward, and the first toothed part is arranged on the outer flange, and the extrusion cylinder is provided with an outer convex ring corresponding to the outer flange.

21. A juicer as claimed in claim 20, wherein: The top surface of the outer flange comprises an inclined surface, and the first toothed part is arranged on the inclined surface, and the inner wall of the outer convex ring is provided with a second toothed part corresponding to the position of the first toothed part.

22. A juicer as claimed in claim 21, characterised in that: The extrusion gap between the first toothed part and the second toothed part is 0.1 mm to 0.5 mm.

23. A juicer as claimed in claim 14, wherein: The extrusion assembly further comprises an outer cylinder body arranged outside the extrusion cylinder, the outer cylinder body is provided with the juice outlet, and a liquid channel is formed between the outer cylinder body and the extrusion cylinder, and the liquid and / or substance extruded from the first extrusion section and the second extrusion section enters the liquid channel.

24. A juicer as claimed in claim 23, wherein: The outer cylinder body is provided with a residue discharge port, and the residue of the fruit and vegetable after being extruded between the extrusion cylinder and the second extrusion section is discharged through the residue discharge port.

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