Juicer with good scraping effect

Abstract

The utility model relates to a juicer with a good scraping effect, which comprises a hopper, a juice collecting barrel, a screw rod, a pressing plate, a material pushing rod and a pre-cutting piece, the material pushing rod comprises a main body part extending into the hopper and a flexible part arranged at the bottom of the main body part, the outer end of a first cutting edge rotates around the axis to form a revolution surface, and a second cutting edge rotates around the axis to form a second revolution surface. An upper connecting face which inclines downwards and extends towards the center is arranged at the lower end of the side wall of the hopper, an annular scraping area is defined between the upper connecting face and the rotation face, and the flexible part inclines along with the material pushing rod and extends into the annular scraping area. According to the technical scheme, the height value between the flexible part and the annular material scraping area can be always small, even if materials with small particle sizes are in the annular material scraping area, the materials can make contact with the bottom face of the flexible part, then the material pushing rod scrapes the materials with the small particle sizes away from the annular material scraping area through the flexible part, and the material scraping efficiency is improved. The accumulation of the materials in the annular scraping area is effectively avoided, the quantity of the materials falling into the screw rod is ensured, and the juice yield is further improved.

Description

Technical Field

[0001] This utility model relates to the field of food processing machine technology, and in particular to a juicer with good scraping effect. Background Technology

[0002] A slow juicer evolved from a conventional juicer, its main function being to turn fruit into juice to improve taste and convenience. Compared to a regular juicer, it extracts juice through low-speed screw extrusion; the lower the extrusion speed, the better, slowly squeezing the juice out like wringing a towel, without damaging the fruit's cell structure and preserving its nutrients. Furthermore, low-speed juicing avoids generating high heat, preventing the juice from oxidizing. In related technologies, a motor combined with a reduction gear structure outputs slow, high torque to meet the high torque required for slow screw extrusion.

[0003] The application number is CN201980029237.3, and the invention is entitled "juicer". It discloses that the hopper is attached to the top of the juicing cylinder, the juicing cylinder contains a screw, the hopper includes a cutting part that can be rotatably attached to the lower end face of the hopper, the cutting part includes a chopping blade that extends upward from the center of rotation to form a spiral shape, and a cutting blade that extends horizontally to form a cutting edge on the lower end face of the hopper, and the screw is located below the lower end of the hopper and is connected to the cutting part in a driving connection. However, the technical problem with this solution is that the inner wall of the hopper is vertically oriented, while the lower end face of the hopper extends horizontally. The hopper sidewall and lower end face are perpendicular to each other, forming a right-angle zone at the junction of the bottom of the sidewall and its lower end face. After pre-cutting by the cutting section, some material enters the space between the screw and the juicing cylinder through the discharge port. Other material, pushed by other materials and propelled by the horizontal cutting blades, is continuously pushed radially outward, entering the right-angle zone along the horizontally extending lower end face of the hopper. Some smaller particles may even get stuck in the gap between the sidewall and lower end face of the right-angle zone. Therefore, material jamming or accumulation is prone to occur in the right-angle zone.

[0004] Secondly, even when using the pusher rod with application number CN202322945643.0, which extends into the hopper to scrape material, the pusher rod forms a rotation zone (first rotation zone) around the screw axis. The trajectory of the pusher rod from the center to the radially outer side is arc-shaped. As the pusher rod rotates radially outward, the height value between the pusher rod and the lower end face of the hopper increases. In other words, the height value between the pusher rod and the right-angle zone is greater than the height value between the pusher rod and the center area of ​​the lower end face of the hopper. Due to the large height value between the bottom surface of the pusher rod and the right-angle zone, smaller particles have difficulty contacting the bottom surface of the pusher rod in the right-angle zone. The pusher rod has difficulty scraping smaller particles away from the right-angle zone, resulting in a scraping blind zone in the right-angle zone. A large amount of material will always accumulate in the right-angle zone, reducing the amount of material falling into the screw and lowering the juice yield.

[0005] Application number CN202420353716.9, entitled "A Juicing Component," discloses an arc-shaped pressure plate that curves upwards from the center of a screw, with the inner wall of the feed cylinder being vertically oriented. The screw is connected to a first cutting edge, and the pressure plate is installed between the screw and the first cutting edge, which extends along the upper surface of the pressure plate. However, the technical problem with this solution is that, because the first cutting edge curves upwards from the inside out, the material may be lifted upwards by the action of the first cutting edge. Some of the material, after being cut by the first cutting edge, will be lifted and run towards the inner wall of the feed cylinder. Since the inner wall of the feed cylinder is vertically oriented, the distance between the outer end of the first cutting edge and the inner wall of the feed cylinder is small. Therefore, there is a narrow connection area at the junction of the feed cylinder side wall and the pressure plate, except for the outer end of the first cutting edge. The lifted material is prone to colliding with the connection area, and at the moment of impact, some material will break and stick to the wall in the connection area. Even when using the pusher bar in the existing technology, because the inner wall of the feed cylinder (hopper) is vertically arranged and the trajectory of the pusher bar from the center to the radially outer side is arc-shaped, the material hanging on the wall in the connection area will prevent the flexible part of the pusher bar from extending into the narrow connection area due to the upward-curving outer end of the first cutting edge. The small-sized material hanging on the wall in the connection area has difficulty contacting the flexible part of the pusher bar, resulting in a scraping blind zone in the connection area. A large amount of material will always accumulate, reducing the amount of material falling into the screw and lowering the juice yield.

[0006] The above-disclosed technical solutions all have the following technical problems: at the bottom of the feed cylinder sidewall and the connection area of ​​the pressure plate, because the material with a smaller particle size is difficult to contact the bottom surface of the pusher bar in the connection area, it is difficult for the pusher bar to scrape the material with a smaller particle size away from the connection area. As a result, a lot of material will always accumulate in this area, creating a scraping blind zone, which reduces the amount of material falling into the screw and reduces the juice yield. Utility Model Content

[0007] The purpose of this invention is to provide a juicer with good scraping effect, in order to solve the technical problem that small particles have difficulty contacting the bottom surface of the pusher bar in the connection area between the bottom of the side wall of the feed cylinder and the pressure plate, resulting in a scraping blind zone in the connection area, which reduces the amount of material falling into the screw and reduces the juice yield.

[0008] To solve the above-mentioned technical problems, this utility model provides a juicer with good scraping effect, comprising:

[0009] The hopper has an opening at the bottom.

[0010] The juice collection bucket is detachably connected to the bottom of the hopper;

[0011] A screw, disposed inside the juice collection tank, includes a screw body and a helix disposed on the outer surface of the screw body;

[0012] A pre-cutting component is disposed inside the hopper and is connected to the upper end of the screw for transmission, including a first cutting edge that extends upwardly from the center outwards;

[0013] A pressure plate is installed between the screw body and the pre-cutting part, and is located at the bottom of the hopper. A guide plate and a discharge port are provided along the rotation direction of the screw. The guide plate has a continuous circumferential surface. The guide plate is installed at the opening. The first cutting edge extends along the upper surface of the guide plate.

[0014] The pusher includes a main body that extends into the hopper and a flexible part disposed at the bottom of the main body;

[0015] The outer end of the first cutting edge rotates around the axis to form a rotating surface. The lower end of the hopper sidewall has an upper connecting surface that slopes downward and extends towards the center. An annular scraping area is formed between the upper connecting surface and the rotating surface. The flexible part tilts with the pusher bar and extends into the annular scraping area.

[0016] Preferably, the upper surface of the guide plate extends upward from the center outward at an upward angle, and the lower end of the upper connecting surface is connected to the upper surface of the guide plate in a transitional manner.

[0017] Preferably, the upper surface of the guide plate has a lower connecting surface that protrudes radially from the outer end face of the first cutting edge, and the upper connecting surface and the lower connecting surface form the bottom surface of the annular scraping area.

[0018] Preferably, the upper connecting surface and the lower connecting surface are staggered vertically, with the upper connecting surface located above the lower connecting surface.

[0019] Preferably, a stepped surface extending towards the center is formed at the connection between the bottom end of the upper connecting surface and the opening, and the guide plate includes an abutting part disposed on the outer periphery of the lower connecting surface, the abutting part being disposed below the stepped surface and pressing against it.

[0020] Preferably, a pre-crushing cavity with an arc-shaped bottom is formed between the top and bottom of the pressure plate, and the pre-crushing cavity is connected to the annular scraping area.

[0021] Preferably, both the upper connecting surface and the upper surface of the guide plate are curved upwards from the center outwards, and the height between the annular scraping area and the bottom surface of the flexible part is equal everywhere.

[0022] Preferably, the pre-cutting component further includes a second cutting edge that spirally extends upward at the center of rotation. The tips of the first and second cutting edges are arranged opposite each other circumferentially. The first and second cutting edges surround a cutting rotation zone located inside the annular scraping zone along the rotation direction of the screw. The bottom of the flexible part extends into the cutting rotation zone.

[0023] Preferably, the flexible portion is located above the first cutting edge, and the upper end of the second cutting edge is located above the lower end of the flexible portion.

[0024] Preferably, the angle between the pusher bar and the screw shaft is 0°-16°, the hopper has a hopper cover, the hopper cover has a through hole for the pusher bar to extend into, the inner diameter of the through hole is D, and the outer diameter of the main body is d, where d < D < 45 mm.

[0025] The beneficial effects of this utility model are:

[0026] 1. This utility model provides a juicer with good scraping effect. A rotating surface is formed by the outer end of the first cutting edge rotating around an axis. An annular scraping area is formed between the upper connecting surface and the rotating surface. The lower end of the hopper sidewall has a downward-sloping upper connecting surface extending towards the center. The first cutting edge extends upwards from the center outwards, forming the bottom surface of the annular scraping area. The trajectory of the pusher rod from the center to the radially outer side is an upward-curving arc. This ensures that the arc trajectory of the pusher rod matches the deformation trend of the bottom surface of the annular scraping area, both extending upwards and outwards from the center. This prevents significant changes in the height between the bottom surface of the flexible part and the bottom surface of the annular scraping area during the pusher rod's radial outward movement within the annular scraping area. This keeps the height between the flexible part and the annular scraping area consistently small, ensuring that even small-sized materials can contact the bottom surface of the flexible part within the annular scraping area, thus improving the scraping effect. The rod scrapes smaller particles away from the annular scraping zone through its flexible section, effectively preventing material accumulation within the zone and ensuring sufficient material entering the screw, thereby increasing juice yield. Secondly, the first cutting edge is inclined upwards from the inside out. Although material may be thrown upwards by the first cutting edge, and some material will be thrown towards the hopper sidewall after being cut, the downward inclination of the upper connecting surface and its extension towards the center creates a horizontal displacement between the hopper sidewall and the outer end of the first cutting edge. This prevents material from easily impacting the upper connecting surface after being cut by the first cutting edge, avoiding material breakage and adhesion within the annular scraping zone and reducing the difficulty of cleaning material within the zone. Furthermore, the large radial distance between the upper connecting surface and the rotating surface allows the flexible section to extend into the annular scraping zone, enabling smaller particles to contact the flexible section and scrape off accumulated material.

[0027] 2. The upper surface of the guide plate extends upwards from the center outwards, with the lower end of the upper connecting surface transitioning to the upper surface of the guide plate. The changing trends of the upper surface of the guide plate and the upper connecting surface are consistent, both sloping upwards from the center outwards. The lower end of the upper connecting surface and the upper end of the guide plate transition to each other. The upper connecting surface is located above the guide plate, continuously sloping upwards radially outwards from the guide plate to the upper connecting surface. The trajectory of the pusher rod from the center to the radially outer side is a continuously upward-curving arc, allowing the pusher rod to move from the guide plate... As the material tray moves to the upper connecting surface, the arc-shaped trajectory of the pusher bar matches the deformation trend of the bottom surface of the annular scraping zone, gradually tilting upwards from the inside to the outside. This ensures that the height between the bottom surface of the flexible part and the bottom surface of the annular scraping zone does not change significantly from the inside to the outside as the pusher bar moves radially outwards within the annular scraping zone. This keeps the height between the flexible part and the annular scraping zone relatively small, allowing smaller particles to contact the bottom surface of the flexible part within the annular scraping zone and be scraped away from the annular scraping zone.

[0028] 3. The upper and lower connecting surfaces are staggered, with the upper connecting surface located above the lower connecting surface. The connection between the upper and lower connecting surfaces is vertically aligned axially. This allows the material to fall freely into the lower connecting surface when scraped off the upper connecting surface by the flexible part. There is no horizontal displacement at the connection between the upper and lower connecting surfaces, which shortens the material's path from the upper to the lower connecting surface and improves the efficiency of the material falling into the guide plate. This ensures that the material is promptly scraped into the discharge port when the first cutting edge rotates circumferentially, guaranteeing the efficiency of material entering the discharge port within the annular scraping zone and thus ensuring overall juicing efficiency.

[0029] 4. Based on the stepped surface extending towards the center formed at the connection between the bottom end of the upper connecting surface and the opening, the guide plate includes an abutment portion located on the outer periphery of the lower connecting surface. The abutment portion is located below the stepped surface and abuts against it, enabling the abutment portion to be detachably fixed to the connection between the upper connecting surface and the opening, thereby allowing the guide plate to be detachably installed at the bottom of the hopper. Furthermore, the abutment portion is located below the stepped surface, below and outside the bottom end of the upper connecting surface, and is also located on the outer periphery of the lower connecting surface, allowing the lower end of the upper connecting surface to directly connect to the lower connecting surface, enabling materials on the upper connecting surface to fall into the lower connecting surface via a shorter path. On the connecting surface, if the material rolls directly from the upper connecting surface and comes into contact with the first cutting edge, the gravitational potential energy of the material will act on the first cutting edge. When the rolling material is large and concentrated, it will have a radial inward impact force on the first cutting edge. By adding a lower connecting surface between the upper connecting surface and the first cutting edge, the falling material is buffered at the lower connecting surface, which avoids the first cutting edge from generating abnormal noise due to the impact and friction of the material during the rotational cutting process. It also further avoids the first cutting edge from oscillating radially, thereby ensuring that the screw connected to the first cutting edge does not oscillate radially, so as to ensure the performance of material grinding.

[0030] 5. A pre-grinding chamber with an arc-shaped bottom is formed between the top and bottom of the pressure plate. The pre-grinding chamber is connected to the annular scraping area. The lower end of the annular scraping area is located at the upper end of the pre-grinding chamber. When the material is scraped off from the annular scraping area by the flexible part, it can enter the pre-grinding chamber from top to bottom under the action of gravity. After being scraped off from the annular scraping area, the material can continue to be cut into smaller particles by the first cutting edge in the pre-grinding chamber. This allows the material falling into the annular scraping area to be re-cut in the pre-grinding chamber before entering the discharge port, so that the particle size of the material falling into the screw is as small as possible, reducing the grinding pressure of the screw and thus ensuring the overall juicing efficiency. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a cross-sectional schematic diagram from one perspective of a juicer with good scraping effect according to an embodiment of the present invention.

[0033] Figure 2 for Figure 1 The diagram shows the structure of the screw assembly.

[0034] Figure 3 This is a cross-sectional schematic diagram from another perspective of a juicer with good scraping effect according to an embodiment of the present invention.

[0035] Figure 4 for Figure 3 An enlarged schematic diagram of point A shown.

[0036] The names of the components shown in the diagram are as follows:

[0037] 1. Hopper; 11. Upper connecting surface; 12. Annular scraping area; 13. Stepped surface; 14. Storage hopper cover; 2. Juice collection tank; 3. Screw; 41. First cutting edge; 42. Second cutting edge; 5. Pressure plate; 51. Guide plate; 511. Lower connecting surface; 512. Abutment part; 52. Discharge port; 53. Pre-crushing chamber; 54. Groove; 6. Extrusion cylinder; 7. Pusher bar; 71. Main body; 72. Flexible part. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0039] Please see Figures 1-4 The present invention provides a juicer with good scraping effect, comprising a hopper 1, a juice collection tank 2, a screw 3, a pre-cutting part, a pressure plate 5, and a pusher 7.

[0040] The hopper 1 has an opening at its bottom; a juice collection tank 2 is detachably connected to the bottom of the hopper 1; a screw 3 is disposed inside the juice collection tank 2, including a screw 3 body and a spiral disposed on the outer surface of the screw 3 body; a pre-cutting component is disposed inside the hopper 1 and is drivenly connected to the upper end of the screw 3, including a first cutting edge 41 extending upwardly from the center; a pressure plate 5 is installed between the screw 3 body and the pre-cutting component, and is located at the bottom of the hopper 1, with a guide plate 51 and a discharge port 52 along the rotation direction of the screw 3, the guide plate 51 having a continuous circumferential surface, the guide plate 51 being installed at the opening, and the first cutting edge 41 extending along the upper surface of the guide plate 51; and a pusher 7, including a main body 71 extending into the hopper 1 and a flexible part 72 disposed at the bottom of the main body 71.

[0041] The outer end of the first cutting edge 41 rotates around the axis to form a rotating surface. The lower end of the side wall of the hopper 1 has an upper connecting surface 11 that slopes downward and extends towards the center. An annular scraping area 12 is formed between the upper connecting surface 11 and the rotating surface. The flexible part 72 tilts with the pusher 7 and extends into the annular scraping area 12.

[0042] It should be noted that the annular scraping zone 12 is a rotating annular body that extends axially to a certain height, such as... Figure 4As shown, the radial extent of the annular scraping zone 12 is within the dashed line indication area. The flexible part 72 tilts with the pusher rod 7 and extends into the annular scraping zone 12. The movement range of the pusher rod 7 can be a conical rotation zone. The flexible part 72 moves with the pusher rod 7. When the flexible part 72 tilts to a certain angle, it can extend into the annular scraping zone 12 located on the outer periphery of the pre-cutting part rotation zone. The projection of the conical rotation zone of the pusher rod 7 on the horizontal plane coincides with the projection of the annular scraping zone 12 on the horizontal plane. That is, the flexible part 72 can cover the annular scraping zone 12 during rotation, and the flexible part 72 can scrape the material in the annular scraping zone 12. The pressure plate 5 is part of the screw 3 assembly. The pressure plate 5, the screw 3, and the pre-cutting edge form a screw 3 assembly. The screw 3 shaft passes through the guide plate 51 and is connected to the pre-cutting part for transmission.

[0043] It is understood that the outer end of the first cutting edge 41 rotates around the axis to form a rotating surface, and an annular scraping area 12 is formed between the upper connecting surface 11 and the rotating surface. Since the lower end of the side wall of the hopper 1 has an upper connecting surface 11 that slopes downward and extends towards the center, and the first cutting edge 41 extends upward from the center outward, the bottom surface of the annular scraping area 12 is formed by the surface between the upper connecting surface 11 and the rotating surface. The upper connecting surface 11 is set to slope upward from the center outward, and the trajectory of the pusher 7 from the center to the radially outer side is an upwardly curved arc, so that the arc trajectory of the pusher 7 and the deformation trend of the bottom surface of the annular scraping area 12 are consistent. The components extend outward and upward from the center, ensuring that the height between the bottom surface of the flexible part 72 and the bottom surface of the annular scraping area 12 does not change significantly from the inside to the outside as the pusher 7 moves radially outward within the annular scraping area 12. This keeps the height between the flexible part 72 and the annular scraping area 12 relatively small, so that even small-sized materials can contact the bottom surface of the flexible part 72 within the annular scraping area 12. This allows the pusher 7 to scrape the small-sized materials away from the annular scraping area 12 through the flexible part 72, effectively preventing material accumulation within the annular scraping area 12, ensuring the amount of material falling into the screw 3, and thus improving the juice yield.

[0044] Secondly, the annular scraping zone 12 can scrape the material away from the annular scraping zone 12 in a timely manner, ensuring the effective cutting area of ​​the first cutting edge 41 on the guide plate 51, avoiding the radial inward squeezing force of the material on the first cutting edge 41 in the annular scraping zone 12, thereby reducing the abnormal noise generated by the material squeezing and friction during the rotational cutting process of the first cutting edge 41, preventing the first cutting edge 41 from radially swinging with the screw 3, ensuring the squeezing and grinding gap between the screw 3 and the extrusion cylinder 6, and thus ensuring the grinding performance. Furthermore, the first cutting edge 41 is inclined upward from the inside out. Although the material may be lifted upward by the action of the first cutting edge 41, and some material will be lifted and run towards the side wall of the hopper 1 after being cut by the first cutting edge 41, the lower end of the side wall of the hopper 1 has an upper connecting surface 11 that is inclined downward and extends towards the center. The existence of the upper connecting surface 11 creates a horizontal gap between the side wall of the hopper 1 and the outer end of the first cutting edge 41. In this way, the gap between the material after being cut by the first cutting edge 41 and the side wall of the hopper 1 is increased, and the material is less likely to hit the upper connecting surface 11. This avoids the situation where the material breaks and sticks to the wall in the annular scraping area 12, and reduces the difficulty of cleaning the material in the annular scraping area 12. Furthermore, since the upper connecting surface 11 is inclined upward from the center outward, there is a horizontal distance between the side wall of the hopper 1 and the outer end of the first cutting edge 41, and there is a large radial distance between the upper connecting surface 11 and the rotating surface, so that the flexible part 72 can extend into the annular scraping area 12, allowing materials with smaller particle sizes to come into contact with the flexible part 72, and successfully scraping off the materials accumulated in the annular scraping area 12.

[0045] The connection method between the pressure plate 5 and the upper connecting surface 11 is as follows: the upper surface of the guide plate 51 extends upwards from the center outwards at an upward angle, and the lower end of the upper connecting surface 11 is connected to the upper surface of the guide plate 51 at a transitional position. It should be noted that, generally speaking, the outer end of the first cutting edge 41 does not protrude radially beyond the upper surface of the guide plate 51, that is, the transitional connection between the lower end of the upper connecting surface 11 and the upper surface of the guide plate 51 is still within the annular scraping area 12.

[0046] It is understandable that the changing trends of the upper surface of the guide plate 51 and the upper connecting surface 11 are compatible, both sloping outwards and upwards from the center. The lower end of the upper connecting surface 11 and the upper end of the guide plate 51 are connected vertically. The upper connecting surface 11 is positioned above the guide plate 51, continuously sloping upwards radially outwards from the guide plate 51 to the upper connecting surface 11. The trajectory of the pusher rod 7 from the center to the radially outer side is a continuously upward-curving arc. This ensures that during the process of the pusher rod 7 moving from the guide plate 51 to the upper connecting surface 11, the arc of the pusher rod 7... The trajectory and the deformation trend of the bottom surface of the annular scraping zone 12 are consistent, and the material gradually tilts upward from the inside to the outside. This ensures that the height between the bottom surface of the flexible part 72 and the bottom surface of the annular scraping zone 12 does not change significantly from the inside to the outside during the radial outward movement of the pusher rod 7 in the annular scraping zone 12. This keeps the height between the flexible part 72 and the annular scraping zone 12 relatively small, allowing smaller particles to contact the bottom surface of the flexible part 72 in the annular scraping zone 12 and scrape them away from the annular scraping zone 12.

[0047] There are several ways to form the bottom surface of the annular scraping area 12: when the upper surface of the guide plate 51 is radially flush with the outer end face of the first cutting edge 41, the upper connecting surface 11 forms the bottom surface of the annular scraping area 12; when the upper surface of the guide plate 51 protrudes radially from the outer end face of the first cutting edge 41, the surface of the upper surface of the guide plate 51 that protrudes radially from the outer end face of the first cutting edge 41 and the upper connecting surface 11 form the bottom surface of the annular scraping area 12.

[0048] In one embodiment, such as Figures 3-4 As shown, the upper surface of the guide plate 51 has a lower connecting surface 511 that protrudes radially from the outer end face of the first cutting edge 41. The upper connecting surface 11 and the lower connecting surface 511 form the bottom surface of the annular scraping area 12. It is understood that the lower connecting surface 511 is also provided between the radially rotating surface of the outer end of the first cutting edge 41 and the upper connecting surface 11, further increasing the distance between the material cut by the first cutting edge 41 and the side wall of the hopper 1. This makes it less likely for the material to impact the upper connecting surface 11, further preventing material breakage and adhesion within the annular scraping area 12. On the other hand, the addition of the lower connecting surface 511 to the radial distance between the side wall of the hopper 1 and the outer end of the first cutting edge 41 increases the radial distance between the upper connecting surface 11 and the rotating surface, allowing the flexible part 72 sufficient space to extend into the annular scraping area 12, making it easier for the flexible part 72 of the pusher rod 7 to scrape the material out of the annular scraping area 12.

[0049] It should be noted that the lower end of the side wall of the hopper 1 has an upper connecting surface 11 that slopes downward and extends towards the center. That is, the upper connecting surface 11 can be an arc surface that curves upward from the center outward, or it can be a slope surface that slopes upward from the center outward. The upper surface of the guide plate 51 extends upward from the center outward. That is, the upper surface of the guide plate 51 can be an arc surface that curves upward from the center outward, or it can be a slope surface that slopes upward from the center outward. The lower connecting surface 511 is a part of the upper surface of the guide plate 51. That is, the lower connecting surface 511 can be an arc surface that curves upward from the center outward, or it can be a slope surface that slopes upward from the center outward. The first cutting edge 41 extends upward from the center outward and extends along the upper surface of the guide plate 51. Similarly, the first cutting edge 41 can be an arc surface or a slope surface that curves upward from the center outward.

[0050] In a preferred embodiment, both the upper connecting surface 11 and the lower connecting surface 511 are curved arc surfaces that curve upwards from the center outwards. It is understood that the trajectory of the pusher rod 7 from the center to the radially outer side is a continuously upward-curving arc. The upper connecting surface 11 and the lower connecting surface 511 serve as the bottom surface of the annular scraping area 12. Since both the upper connecting surface 11 and the lower connecting surface 511 are curved arc surfaces that curve upwards from the center outwards, the running trajectory of the pusher rod 7 matches the deformation trend of the bottom surface of the annular scraping area 12. This ensures that during the radially outer movement of the pusher rod 7 within the annular scraping area 12, the height between the bottom surface of the flexible part 72 and the bottom surface of the annular scraping area 12 does not change significantly from the inside to the outside.

[0051] More specifically, such as Figures 2-4 As shown, a pre-crushing chamber 53 with an arc-shaped bottom is formed between the top and bottom ends of the pressure plate 5, and the pre-crushing chamber 53 is connected to the annular scraping area 12; the axial height of the pre-crushing chamber 53 is as follows: Figure 2 The area shown is within the dashed line.

[0052] It is understandable that, since both the upper connecting surface 11 and the first cutting edge 41 extend upwards from the center, the bottom surface of the annular scraping area 12 gradually extends upwards. That is, the lower end of the annular scraping area 12 is located at the upper end of the pre-grinding chamber 53. When the material is scraped off from the annular scraping area 12 by the flexible part 72, it can enter the pre-grinding chamber 53 from top to bottom under the action of gravity. After the material is scraped off from the annular scraping area 12, it can continue to be cut into smaller particles by the first cutting edge 41 in the pre-grinding chamber 53. This allows the material falling into the annular scraping area 12 to be re-cut in the pre-grinding chamber 53 before entering the discharge port 52, so that the particle size of the material falling into the screw 3 is as small as possible, reducing the grinding pressure of the screw 3, and thus ensuring the overall juicing efficiency.

[0053] It should be noted that the lower end of the upper connecting surface 11 is connected to the upper surface of the guide plate 51 through a transitional connection. This transitional connection can be a smooth arc connection, or a staggered connection, etc. Other connection methods are also possible, depending on the implementation situation.

[0054] Specifically, such as Figures 1-4 As shown, the upper connecting surface 11 and the lower connecting surface 511 are staggered vertically, with the upper connecting surface 11 located above the lower connecting surface 511. Furthermore, at the connection point between the upper connecting surface 11 and the lower connecting surface 511, that is, at the inner side of the stepped surface 13 and the inner side of the abutting portion 512, they are flush vertically aligned, meaning the inner sides of the stepped surface 13 and the abutting portion 512 are vertically aligned axially.

[0055] It is understandable that the lower end of the upper connecting surface 11 is located at the upper end of the lower connecting surface 511. The connection between the upper connecting surface 11 and the lower connecting surface 511 is vertically arranged along the axial direction. That is, it is vertically arranged along the axial direction on the inner side of the stepped surface 13 and the inner side of the abutment part 512. When the material is scraped off from the upper connecting surface 11 by the flexible part 72, it can fall freely into the lower connecting surface 511. There is no horizontal displacement at the connection between the upper connecting surface 11 and the lower connecting surface 511. This can shorten the running path of the material from the upper connecting surface 11 to the lower connecting surface 511, improve the running efficiency of the material falling into the guide plate 51, and thus enable the material to be scraped into the discharge port 52 in time when the first cutting edge 41 rotates in the circumferential direction. This ensures the running efficiency of the material in the annular scraping area 12 entering the discharge port 52, thereby ensuring the overall juicing efficiency.

[0056] In another embodiment, not shown in the figure, the lower end of the upper connecting surface 11 is smoothly connected to the upper end of the lower connecting surface 511, which can be achieved through a smooth transition by an arc, etc.

[0057] In one embodiment, both the upper connecting surface 11 and the upper surface of the guide plate 51 are curved upward from the center outward, and the height between the annular scraping area 12 and the bottom surface of the flexible part 72 is equal everywhere.

[0058] It is understandable that the trajectory of the pusher bar 7 from the center to the radially outer side is an upward curved arc. By setting both the upper connecting surface 11 and the upper surface of the guide plate 51 to be curved upward from the center outward, the deformation trend of the flexible part 72 on the pusher bar 7 and the bottom surface of the annular scraping area 12 is matched. From the radially inner side to the outer side, the height value between the bottom surface of the annular scraping area 12 and the flexible part 72 is always equal. This ensures that the flexible part 72 can always scrape the material with a smaller particle size in the annular scraping area 12. Even small particle size materials on the outer periphery of the pressure plate 5 can still be scraped off by the flexible part 72, ensuring the reliability of scraping.

[0059] Specifically, such as Figures 3-4 As shown, a stepped surface 13 extending towards the center is formed at the connection between the bottom end of the upper connecting surface 11 and the opening. The guide plate 51 includes an abutting portion 512 disposed on the outer periphery of the lower connecting surface 511. The abutting portion 512 is disposed below the stepped surface 13 and abuts against it. It should be explained that the abutting portion 512 is a circumferentially arranged annular body, and the abutting portion 512 is integrally formed with the lower connecting surface 511.

[0060] Understandably, since the bottom of the hopper 1 has an opening and no bottom surface, it is an open structure. By pressing the abutment part 512 against the lower part of the stepped surface 13, the abutment part 512 can be detachably fixed to the connection between the upper connecting part and the opening, thereby allowing the guide plate 51 to be detachably installed at the bottom of the hopper 1. Secondly, the abutment part 512 is located below the stepped surface 13, that is, the abutment part 512 is located on the lower outer side below the bottom end of the upper connecting surface 11, and the abutment part 512 is also located on the outer periphery of the lower connecting surface 511, so that the lower end of the upper connecting surface 11 can directly connect to the lower connecting surface 511, allowing the material on the upper connecting surface 11 to fall onto the lower connecting surface 511 through a shorter path. If the material rolls directly from the upper connecting surface 11 and comes into contact with the first cutting edge 41, the gravitational potential energy of the material acts on the first cutting edge 41. When the rolling material is large and concentrated, it will have a radial inward impact force on the first cutting edge 41. By adding a lower connecting surface 511 between the upper connecting surface 11 and the first cutting edge 41, the falling material is buffered at the lower connecting surface 511, which avoids the first cutting edge 41 from generating abnormal noise due to the impact and friction of the material during the rotational cutting process. It also further avoids the first cutting edge 41 from oscillating radially, thereby ensuring that the screw 3, which is connected to the first cutting edge 41, does not oscillate radially, so that the extrusion and grinding gap between the screw 3 and the extrusion cylinder 6 remains stable, thus ensuring the performance of material grinding. Therefore, by directly connecting the lower connecting surface 511 below the upper connecting surface 11, the material can enter the area of ​​the first cutting edge 41 for rotary cutting with a shorter path, ensuring the overall pre-crushing efficiency; at the same time, the lower connecting surface 511 can buffer the material, so that the material does not generate a large impact force on the first cutting edge 41, avoiding pre-crushing noise and radial disturbance of the screw 3.

[0061] More specifically, the juicer also includes a squeezing cylinder 6 inserted into the juice collection tank 2, and a groove 54 is formed between the side of the opening and the bottom surface of the abutting part 512, so the upper end of the squeezing cylinder 6 extends into the groove 54 and abuts against the bottom surface of the abutting part 512.

[0062] Understandably, the slot 54 is triangular in shape, and the diameter of the extrusion cylinder 6 gradually increases from bottom to top, extending horizontally outward at the upper end of the extrusion cylinder 6. This allows the upper end shape of the extrusion cylinder 6 to match the shape of the slot 54. The upper end of the extrusion cylinder 6 extends into the slot 54. Since the stepped surface 13 protrudes from the side of the opening, the abutting part 512 abuts against the lower part of the stepped surface 13. The bottom surfaces of the extrusion cylinder 6 and the abutting part 512 are pressed tightly together. The pressure plate 5 is formed by the stepped surface 13 and the extrusion cylinder. The pressing of the 6th part achieves the axial limiting installation of the pressing plate 5. Then, the bottom surface of the extrusion cylinder 6 is inserted into the juice collection tank 2, and its upper end abuts against the bottom surface of the abutment part 512. The upper and lower parts of the extrusion cylinder 6 are pressed together by the pressing plate 5 and the juice collection tank 2, thus achieving the axial limiting installation of the extrusion cylinder 6. From top to bottom, the pressing plate 5 and the extrusion cylinder 6 are pressed together through the stepped surface 13, without the need for other assembly locking parts. This not only makes the structure simple, but also provides a good axial limiting effect through the upper and lower clamping method.

[0063] In addition, such as Figures 1-3 As shown, the pre-cutting part further includes a second cutting edge 42 that extends spirally upward at the center of rotation. The tips of the first cutting edge 41 and the second cutting edge 42 are arranged opposite each other in the circumferential direction. The first cutting edge 41 and the second cutting edge 42 surround a cutting rotation area located on the outer periphery of the annular scraping area 12 along the rotation direction of the screw 3. The bottom of the flexible part 72 extends into the cutting rotation area.

[0064] It is understandable that the rotation area of ​​the pusher 7 is larger than the cutting rotation area. The rotation area of ​​the pusher 7 covers the cutting rotation area and the annular scraping area 12. The outer periphery of the cutting rotation area is the annular scraping area 12, which allows the flexible part 72 to tilt with the pusher 7 and extend into the annular scraping area 12. At the same time, the flexible part 72 can also extend into the cutting rotation area at a small angle to scrape the material in the cutting rotation area off the first cutting edge 41 and the second cutting edge 42, so that the material does not stick or get stuck on the first cutting edge 41 and the second cutting edge 42, and the material can fall smoothly into the discharge port 52. Therefore, under the action of the flexible part 72, there is as few scraping blind areas as possible in the hopper 1.

[0065] Specifically, the flexible part 72 is located above the first cutting edge 41, and the upper end of the second cutting edge 42 is located above the lower end of the flexible part 72. It is understood that having the upper end of the second cutting edge 42 above the lower end of the flexible part 72 minimizes the height between the flexible part 72 of the pusher bar 7 and the pre-cutting part, ensuring a good pushing effect. Simultaneously, positioning the flexible part 72 above the first cutting edge 41 avoids damage to the flexible part 72 due to excessively close proximity between it and the pre-cutting part.

[0066] In other embodiments, the upper surface of the first cutting edge 41 may be flush with the flexible part 72, or the bottom surface of the flexible part 72 may be lower than the upper surface of the first cutting edge 41, etc., without limitation.

[0067] More specifically, the angle between the pusher rod 7 and the axis of the screw 3 is 0°-16°. The hopper 1 has a hopper cover 14 with a through hole for the pusher rod 7 to extend into it. The inner diameter of the through hole is D, and the outer diameter of the main body 71 is d, where d < D < 45 mm. Because there is a certain gap between the pusher rod 7 and the through hole of the hopper cover 14, the pusher rod 7 can be tilted at a certain angle within the hopper 1, allowing the angle between the pusher rod 7 and the axis of the screw 3 to be 0°-16°. This allows the flexible part 72 to tilt with the pusher rod 7 and extend into the annular scraping area 12. Simultaneously, the flexible part 72 can also extend into the cutting rotation area at a smaller angle, scraping the material in the cutting rotation area from the first cutting edge 41 and the second cutting edge 42.

[0068] In addition to the preferred embodiments described above, the technical solutions protected by this utility model are not limited to the above embodiments. It should be noted that the combination of multiple technical solutions in any one embodiment, as well as the combination of technical solutions in any one embodiment with technical solutions in one or more other embodiments, are within the protection scope of this utility model. Although this utility model has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of this utility model are within the scope of protection claimed by this utility model.

Claims

1. A juicer with improved scraping effect, characterized in that, The application relates to a hopper, a juice collecting barrel, a screw rod, a pre-cutting piece, a pressing plate and a pushing rod. The hopper is provided with an opening at the bottom end. The juice collecting barrel is detachably connected with the bottom of the hopper. The screw rod is arranged in the juice collecting barrel and comprises a screw rod body and a spiral arranged on the outer surface of the screw rod body. The pre-cutting piece is arranged in the hopper and is in transmission connection with the upper end of the screw rod, and comprises a first cutting edge which extends upwards and outward from the center. The pressing plate is installed between the screw rod body and the pre-cutting piece and is located at the bottom of the hopper. The pushing rod comprises a main body part which extends into the hopper and a flexible part arranged at the bottom of the main body part. The outer end of the first cutting edge rotates around the shaft center to form a rotary surface.

2. The juicer of claim 1, wherein, The lower end of the side wall of the hopper is provided with an upper connecting surface which extends downwards and towards the center.

3. The juicer of claim 1, wherein, The upper connecting surface and the rotary surface form an annular scraping area.

4. The juicer of claim 3, wherein, The upper surface of the guide disc extends upwards and outward from the center.

5. The juicer of claim 3, wherein, The lower end of the upper connecting surface is in up-down transition connection with the upper surface of the guide disc.

6. The juicer of claim 1, wherein, The upper surface of the guide disc has a lower connecting surface which protrudes radially from the outer end surface of the first cutting edge.

7. The juicer of claim 1, wherein, The upper connecting surface and the lower connecting surface are arranged in up-down staggered mode.

8. The juicer of claim 1, wherein, The upper connecting surface is located above the lower connecting surface.

9. The juicer of claim 8, wherein, The bottom end of the upper connecting surface and the opening are connected to form a step surface which extends towards the center.

10. The juicer of claim 1, wherein, The guide disc comprises an abutting part arranged on the outer periphery of the lower connecting surface and abutting tightly below the step surface. The pressing plate is provided with a pre-pulverizing cavity with an arc-shaped bottom surface. The upper connecting surface and the upper surface of the guide disc are arranged in a curved mode from the center to the outside. The first cutting edge and the second cutting edge are arranged in opposite mode along the circumferential direction. The flexible part is located above the first cutting edge and below the upper end of the second cutting edge. The angle between the pushing rod and the shaft center is 0-16 degrees. The hopper is provided with a hopper cover which is provided with a through hole for the pushing rod. The inner diameter of the through hole is D. The outer diameter of the main body part is d. d D

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