Juicer with low noise and good grinding performance

Abstract

The low-noise juicer with the good grinding performance comprises a hopper, a juice collecting barrel, a screw rod, a pressing plate and a pre-cutting piece, the pressing plate is provided with a material guiding disc and a material falling opening in the rotating direction of the screw rod, and the lower end of the side wall of the hopper is provided with an upper connecting face which inclines downwards and extends towards the center. The upper surface of the material guiding disc is provided with a lower connecting face protruding out of the outer end face of the first cutting edge in the radial direction, and the lower end of the upper connecting face and the upper end of the lower connecting face are connected and define an annular rotation area in the circumferential direction. According to the technical scheme, materials are subjected to buffering operation for a period of time from the upper connecting face and then downwards move into the lower connecting face below the upper connecting face, the effective cutting area of the first cutting edges on the material guide disc is guaranteed, the inward extrusion force of the materials on the first cutting edges in the radial direction in the annular rotation area is avoided, and the cutting efficiency is improved. Abnormal noise generated by extrusion and friction of materials on the first cutting edge in the process that the first cutting edge rotationally cuts the materials is reduced, and the situation that the screw rod swings in the radial direction due to shaking of the first cutting edge is avoided.

Description

Technical Field

[0001] This utility model relates to the field of food processing machine technology, and in particular to a juicer with low noise and good grinding performance. 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 arranged, the lower end face of the hopper extends horizontally, and the side wall and the lower end face of the hopper are perpendicular to each other. A right-angle zone is formed at the connection between the bottom of the side wall and its lower end face. After being cut by the chopping blade and the first inner protrusion, some of the material enters the right-angle zone along the side wall of the hopper. The material accumulating in the right-angle zone will gradually increase, and the horizontal cutting blade will only push the material radially outward. As a result, the material that has been cut by the chopping blade and entered the right-angle zone is difficult to be pre-cut by the horizontal cutting blade in the effective cutting area of ​​the bottom of the hopper, which reduces the pre-cutting efficiency in the hopper.

[0004] To address the aforementioned technical problems, application number CN202420353716.9, entitled "A Juicing Assembly," discloses an arc-shaped pressure plate that curves upwards from the center of the screw, with the inner wall of the feed cylinder (hopper) being vertically arranged. The screw is connected to a first cutting edge, and the pressure plate is installed between the screw and the first cutting edge, with the first cutting edge extending along the upper surface of the pressure plate. However, the technical problem with this solution is that, due to the arc-shaped arrangement of the pressure plate, although the connection between the edge of the pressure plate and the bottom of the feed cylinder side wall is arc-shaped, over a long period of operation, the material can gradually move along the center direction of the pressure plate, preventing material accumulation between the pressure plate and the bottom of the feed cylinder side wall. However, in short-term operation, after the material is pre-cut by the upper cutting edge and the first inner protrusion of the feed cylinder, some of the material falls directly into the edge area of ​​the arc-shaped pressure plate due to the vertical bottom of the feed cylinder side wall. This causes the amount of material at the edge of the pressure plate to be greater than that near the center of the pressure plate in a short period of time. When too much material accumulates and cannot be pre-cut by the lower cutting edge in time, the material at the edge of the pressure plate exerts a significant radial inward squeezing force on the lower cutting edge. During the rotational cutting of the material, the lower cutting edge will generate abnormal noise due to the squeezing friction. It will also cause the screw to oscillate radially through the lower cutting edge, affecting the squeezing and grinding gap between the screw and the juicing cylinder, and thus affecting the grinding performance of the material.

[0005] The above-disclosed technical solutions all have the following technical problems: Since the side wall of the hopper is vertically set, in a short period of time, the amount of material falling into the edge of the pressure plate is greater than the amount of material in the center area of ​​the pressure plate. When there is a lot of material, the material at the edge of the pressure plate will exert a significant radial inward squeezing force on the lower cutting edge. During the process of rotating and cutting the material, the lower cutting edge will produce abnormal noise due to squeezing friction. In addition, the lower cutting edge will also cause radial oscillation with the screw, affecting the squeezing and grinding gap between the screw and the juicing cylinder, thereby affecting the performance of material grinding. Utility Model Content

[0006] The purpose of this utility model is to provide a juicer with low noise and good grinding performance, so as to solve the technical problems that in a short time, the amount of material at the edge of the pressure plate is greater than the amount of material in the center area of ​​the pressure plate, the lower cutting edge generates abnormal noise due to the pressure and friction of the material during the rotating cutting process, and the lower cutting edge swings due to the pressure, causing the screw to also swing radially, which affects the grinding performance of the material.

[0007] To solve the above-mentioned technical problems, this utility model provides a juicer with low noise and good grinding performance, comprising:

[0008] The hopper has an opening at the bottom.

[0009] The juice collection bucket is detachably connected to the bottom of the hopper;

[0010] A screw, disposed inside the juice collection tank, includes a screw body and a helix disposed on the outer surface of the screw body;

[0011] A pre-cutting component, disposed inside the hopper and connected to the upper end of the screw, includes a first cutting edge;

[0012] 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 surface in the circumferential direction. The guide plate is installed at the opening. The upper surface of the guide plate extends upward from the center outward. The first cutting edge extends along the upper surface of the guide plate.

[0013] The hopper sidewall has an upper connecting surface that slopes downward and extends towards the center, and 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. The lower end of the upper connecting surface and the upper end of the lower connecting surface are connected and surround an annular rotating area in the circumferential direction.

[0014] Preferably, the first cutting edge is curved upward from the center outward, and the projection of the first cutting edge on the vertical plane is located within the projection of the annular rotation area on the vertical plane.

[0015] Preferably, the projection of the upper part of the first cutting edge on the vertical plane is located within the projection of the upper connecting surface on the vertical plane.

[0016] 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.

[0017] Preferably, the juicer with low noise and good grinding performance further includes a squeezing cylinder inserted into the juice collection tank. A groove is formed between the side of the opening and the bottom surface of the abutting part, so that the upper end of the squeezing cylinder extends into the groove and abuts against the bottom surface of the abutting part.

[0018] Preferably, the inner side of the step surface is flush with the inner side of the abutment portion.

[0019] Preferably, the lower end of the upper connecting surface is smoothly connected to the upper end of the lower connecting surface.

[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 rotating area.

[0021] Preferably, both the upper connecting surface and the lower connecting surface are curved upwards from the center outwards.

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

[0023] The beneficial effects of this utility model are:

[0024] 1. This utility model provides a low-noise juicer with good grinding performance. A pressure plate is installed at the opening of the hopper, between the screw body and the pre-cutting component. The upper surface of the guide plate extends upwards from the center outwards. A first cutting edge extends along the upper surface of the guide plate. The lower end of the hopper sidewall has a downwardly inclined upper connecting surface extending towards the center. The lower end of the upper connecting surface and the upper end of the lower connecting surface are connected and form a circumferential rotating area. Based on this, the lower end of the upper connecting surface and the upper end of the lower connecting surface are connected, with the upper connecting surface located at the upper end of the lower connecting surface. Both the upper and lower connecting surfaces extend upwards from the center outwards. A driving force based on gravity is present on both the upper and lower connecting surfaces, allowing material falling along the hopper sidewall to first enter the upper connecting surface. The material then undergoes a buffering process on the upper connecting surface for a period of time. Then, it moves downwards to the lower connecting surface below the upper connecting surface, extending the radial path of the material in the annular rotating area. This allows some material to be cut into the discharge port on the lower connecting surface, and then enter the lower connecting surface from the upper connecting surface. The amount of material at the edge of the pressure plate is as balanced as possible with the amount of material in the center area of ​​the pressure plate. The cutting efficiency of the pressure plate from the center to the edge is matched, ensuring that the lower connecting surface on the guide plate always has enough space for the outer end of the first cutting edge to pass through. This ensures the effective cutting area of ​​the first cutting edge on the guide plate, avoids the radial inward squeezing force of the material on the first cutting edge in the annular rotating area, reduces the abnormal noise generated by the material squeezing and rubbing against the material during the rotational cutting process, and prevents the screw from wobbling due to the first cutting edge shaking. This ensures the squeezing and grinding gap between the screw and the extrusion cylinder, thereby ensuring the grinding performance.

[0025] 2. The first cutting edge is curved upwards from the center outwards. The projection of the first cutting edge on the vertical plane lies within the projection of the annular rotating area on the vertical plane. Since the outer end of the first cutting edge corresponds to the annular rotating area in the vertical direction, after the material rolls from the upper connecting surface into the lower connecting surface within the annular rotating area, it contacts the first cutting edge as quickly as possible in the vertical direction, thus shortening the path of the material entering the re-cutting range of the first cutting edge in the vertical direction. Therefore, the annular rotating area in the radial direction lengthens the radial path of the material while shortening its vertical path, balancing the falling speed of the material entering the re-cutting area of ​​the pre-cutting part, thereby ensuring the cutting efficiency of the material and the overall juicing efficiency.

[0026] 3. Based on the step 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 step surface and is pressed tightly against it. By pressing the abutment portion against the lower part of the step surface, the abutment portion can be detachably fixed to the connection between the upper connecting surface and the opening, thereby enabling the guide plate to be detachably installed at the bottom of the hopper. Secondly, the abutment portion is located below the step surface and on the lower outer side of the bottom end of the upper connecting surface, while the abutment portion is located on the outer periphery of the lower connecting surface. This allows the lower end of the upper connecting surface to directly connect to the lower connecting surface, allowing material on the upper connecting surface to fall onto the lower connecting surface via a shorter path. If the material rolls directly from the upper connecting surface and contacts the first cutting edge, the gravitational potential energy of the material acts on the first cutting edge. When the rolling material is large and concentrated, it will have a radially 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, avoiding abnormal noise caused by the impact and friction of the material during the rotational cutting of the material by the first cutting edge. It also further avoids radial oscillation of the first cutting edge, thus ensuring that the screw connected to the first cutting edge does not oscillate radially, keeping the extrusion and grinding gap between the screw and the extrusion cylinder stable, and ensuring the grinding performance of the material. Therefore, directly connecting the lower connecting surface below the upper connecting surface allows the material to enter the area of ​​the first cutting edge's rotational cutting with a shorter path, ensuring the overall pre-crushing efficiency; at the same time, the lower connecting surface acts as a buffer for the material, preventing the material from exerting a large impact force on the first cutting edge, avoiding pre-crushing abnormal noise and radial disturbance of the screw.

[0027] 4. A groove is formed between the side of the opening and the bottom of the contact part of the squeezing cylinder inserted into the juice collection tank. The upper end of the squeezing cylinder extends into the groove and abuts against the bottom of the contact part. The groove is roughly triangular in shape. The diameter of the squeezing cylinder gradually increases from bottom to top and extends horizontally outward at the upper end, so that the shape of the upper end of the squeezing cylinder matches the shape of the groove. The upper end of the squeezing cylinder extends into the groove. Because the stepped surface protrudes from the side of the opening, the contact part abuts against the lower part of the stepped surface, squeezing... The bottom surfaces of the pressure cylinder and the abutment part are pressed together. The upper and lower parts of the pressure plate are pressed together by the stepped surface and the extrusion cylinder, which realizes the axial limiting installation of the pressure plate. Secondly, the bottom surface of the extrusion cylinder is inserted into the juice collection tank, and its upper end abuts against the bottom surface of the abutment part. The upper and lower parts of the extrusion cylinder are pressed together by the pressure plate and the juice collection tank, which realizes the axial limiting installation of the extrusion cylinder. From top to bottom, the pressure plate and the extrusion cylinder are pressed together by the stepped surface, without the need for other assembly and locking parts. This not only makes the structure simple, but also provides a good axial limiting effect through the upper and lower clamping method.

[0028] 5. Based on the fact that the inner side of the stepped surface and the inner side of the abutment are flush, the lower end of the upper connecting surface is located at the upper end of the lower connecting surface, and the connection between the upper and lower connecting surfaces is vertically arranged along the axial direction. That is, the inner side of the stepped surface and the inner side of the abutment are vertically arranged along the axial direction, so that when the material leaves the upper connecting surface, it can fall freely into the lower connecting surface. There is no horizontal displacement at the connection between the upper and lower connecting surfaces, which can shorten the running path of the material from the upper connecting surface to the lower connecting surface, improve the running efficiency of the material falling into the guide plate, and thus ensure that the material can be pushed into the discharge port in time when the first cutting edge rotates in the circumferential direction, ensuring the running efficiency of the material entering the discharge port in the annular rotation zone, thereby ensuring the overall juicing efficiency. Attached Figure Description

[0029] 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.

[0030] Figure 1 This is a cross-sectional schematic diagram from one perspective of a juicer with low noise and good grinding performance according to an embodiment of the present invention.

[0031] Figure 2 for Figure 1 The diagram shows the structure of the screw assembly.

[0032] Figure 3 This is a cross-sectional schematic diagram from another perspective of a juicer with low noise and good grinding performance in an embodiment of this utility model.

[0033] Figure 4 for Figure 3 An enlarged schematic diagram of point A shown.

[0034] The names of the components shown in the diagram are as follows:

[0035] 1. Hopper; 11. Upper connecting surface; 12. Annular rotating area; 13. Stepped surface; 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. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Please see Figures 1-4The present invention provides a juicer with low noise and good grinding performance, including a hopper 1, a juice collection tank 2, a screw 3, a pre-cutting part, an extrusion cylinder 6, and a pressure plate 5.

[0038] The hopper 1 has an opening at its bottom; the juice collection tank 2 is detachably connected to the bottom of the hopper 1; the 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; the 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; the 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, and is provided 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 direction. The guide plate 51 is installed at the opening. The upper surface of the guide plate 51 extends upward from the center outward. The first cutting edge 41 extends along the upper surface of the guide plate 51. 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 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 lower end of the upper connecting surface 11 and the upper end of the lower connecting surface 511 are connected and surround an annular rotating area 12 in the circumferential direction.

[0039] It should be noted that the lower connecting surface 511 is located at the edge of the pressure plate 5, and the annular rotating area 12 is a rotating ring that extends axially to a certain height, such as... Figure 4 As shown, the radial extent of the annular rotary zone 12 is within the area indicated by the dashed line. The pressure plate 5 is part of the screw 3 assembly. The pressure plate 5, screw 3, and pre-cutting edge form a screw 3 assembly. The screw 3 shaft passes through the guide plate 51 and is drively connected to the pre-cutting element.

[0040] It is understood that the lower end of the upper connecting surface 11 is connected to the upper end of the lower connecting surface 511. The upper connecting surface 11 is located above the lower connecting surface 511, and both the upper connecting surface 11 and the lower connecting surface 511 extend upwards from the center. There is a driving force of gravity component on both the upper connecting surface 11 and the lower connecting surface 511, so that the material falling along the side wall of the hopper 1 can first enter the upper connecting surface 11. After a period of buffering, the material moves downwards to the lower connecting surface 511 below the upper connecting surface 11, extending the radial running path of the material in the annular rotating area 12. This allows some material to be cut on the lower connecting surface 511 and enter the discharge port 52 before the material flows out from the upper connecting surface. 11. Entering the lower connecting surface 511, the amount of material at the edge of the pressure plate 5 and the amount of material in the center area of ​​the pressure plate 5 are balanced as much as possible. The cutting efficiency of the pressure plate 5 from the center to the edge is matched, so that the lower connecting surface 511 on the guide plate 51 always has enough space to allow the outer end of the first cutting edge 41 to pass through, 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 rotating area 12, reducing the abnormal noise generated by the material squeezing and friction during the rotation cutting of the material by the first cutting edge 41, avoiding the radial swing of the screw 3 caused by the shaking of the first cutting edge 41, ensuring the squeezing and grinding gap between the screw 3 and the extrusion cylinder 6, and thus ensuring the grinding performance.

[0041] 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 rotating area 12; the axial height of the pre-crushing chamber 53 is as follows: Figure 2 The area shown is within the dashed line.

[0042] It is understandable that, since both the upper connecting surface 11 and the lower connecting surface 511 extend upwards from the center, that is, the bottom surface of the annular rotating area 12 gradually extends upwards, and the lower end of the annular rotating area 12 is located at the upper end of the pre-grinding chamber 53, when the material moves downwards and leaves the upper connecting surface 11, it can enter the pre-grinding chamber 53 from top to bottom under the action of gravity. After the material falls from the upper connecting surface 11, it continues 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 rotating 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.

[0043] More specifically, such as Figures 1-3As shown, the pre-cutting component also 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 inside the annular rotation area 12 along the rotation direction of the screw 3.

[0044] It is understandable that the outer periphery of the cutting rotary zone is an annular rotary zone 12, allowing the material to continue to be cut by the first cutting edge 41 or the second cutting edge 42 within the cutting rotary zone after falling from the annular rotary zone 12. This results in smaller particle sizes, with larger particles being preferentially cut by the second cutting edge 42, while smaller particles are on the guide plate 51 and then cut by the first cutting edge 41. This ensures that the material falling into the annular rotary zone 12 is re-cut within the cutting rotary zone before entering the discharge port 52, thereby minimizing the particle size of the material falling into the screw 3, reducing the grinding pressure on the screw 3, and thus ensuring overall juicing efficiency.

[0045] In one embodiment, such as Figures 3-4 As shown, the first cutting edge 41 is curved upward from the center outward, and the projection of the first cutting edge 41 on the vertical plane is located within the projection of the annular rotation area 12 on the vertical plane.

[0046] Understandably, since the outer end of the first cutting edge 41 is vertically aligned with the annular rotating area 12, after the material rolls from the upper connecting surface 11 into the lower connecting surface 511 within the annular rotating area 12, it contacts the first cutting edge 41 as quickly as possible in the vertical direction, thus shortening the path of the material entering the re-cutting range of the first cutting edge 41 in the vertical direction. Therefore, by passing through the annular rotating area 12 in the radial direction, the radial path of the material is extended, while the vertical path is shortened, balancing the falling speed of the material entering the re-cutting area of ​​the pre-cutting part, thereby ensuring the cutting efficiency of the material and the overall juicing efficiency.

[0047] Furthermore, the projection of the upper part of the first cutting edge 41 onto the vertical plane is located within the projection of the upper connecting surface 11 onto the vertical plane.

[0048] It is understandable that by having the upper part of the first cutting edge 41 protrude from the lower connecting surface 511, the material can preferentially contact the upper part of the first cutting edge 41 in the vertical direction after falling from the upper connecting surface 11, and be cut by the first cutting edge 41, thereby further shortening the material's running path in the vertical direction and effectively improving the material's cutting efficiency.

[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 surfaces that curve upwards from the center. It is understood that the upper connecting surface 11 and the lower connecting surface 511 serve as the bottom surface of the annular rotating area 12. Both the upper connecting surface 11 and the lower connecting surface 511 are curved surfaces that curve upwards from the center. Both the upper connecting surface 11 and the lower connecting surface 511 have a driving force generated by the component of gravity. The upper connecting surface 11 is above the lower connecting surface 511, allowing the material to gradually enter the lower connecting surface 511 from the upper connecting surface 11. The curved surface differs from the inclined surface; on the same radial direction, the curvature is different, allowing the material to fall at different speeds on the same radial direction, preventing it from all accumulating in the lower connecting surface 511 at once. This achieves a balance between the amount of material at the edge of the pressure plate 5 and the physical quantity in the central area of ​​the pressure plate 5.

[0051] 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.

[0052] Specifically, such as Figure 1 , Figure 4 As shown, the connection between the upper connecting surface 11 and the lower connecting surface 511, that is, the inner side of the step surface 13 and the inner side of the abutment part 512 are flush with each other, that is, the inner side of the step surface 13 and the inner side of the abutment part 512 are vertically arranged along the axial direction.

[0053] 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. This allows the material to fall freely into the lower connecting surface 511 when it leaves the upper connecting surface 11. There is no horizontal displacement at the connection between the upper connecting surface 11 and the lower connecting surface 511, which can shorten the running path of the material from the upper connecting surface 11 to the lower connecting surface 511 and improve the running efficiency of the material falling into the guide plate 51. This allows the material to be pushed into the discharge port 52 in time when the first cutting edge 41 rotates in the circumferential direction, ensuring the running efficiency of the material entering the discharge port 52 in the annular rotating area 12, thereby ensuring the overall juicing efficiency.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] More specifically, the squeezing cylinder 6 is 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.

[0058] 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.

[0059] 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 having low noise and good grinding performance, characterized in that, include: The hopper has an opening at the bottom. The juice collection bucket is detachably connected to the bottom of the hopper; A screw, disposed inside the juice collection tank, includes a screw body and a helix disposed on the outer surface of the screw body; A pre-cutting component, disposed inside the hopper and connected to the upper end of the screw, includes a first cutting edge; 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 surface in the circumferential direction. The guide plate is installed at the opening. The upper surface of the guide plate extends upward from the center outward. The first cutting edge extends along the upper surface of the guide plate. The hopper sidewall has an upper connecting surface that slopes downward and extends towards the center, and 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. The lower end of the upper connecting surface and the upper end of the lower connecting surface are connected and surround an annular rotating area in the circumferential direction.

2. The juicer of claim 1, wherein The first cutting edge is curved upward from the center outward, and the projection of the first cutting edge on the vertical plane is located within the projection of the annular rotation area on the vertical plane.

3. The juicer of claim 2, wherein The projection of the upper part of the first cutting edge on the vertical plane lies within the projection of the upper connecting surface on the vertical plane.

4. The juicer of claim 1, wherein The bottom end of the upper connecting surface and the opening are connected to form a stepped surface extending towards the center. The guide plate includes an abutting part located on the outer periphery of the lower connecting surface. The abutting part is located below the stepped surface and abuts against it.

5. The juicer of claim 4, wherein The juicer with low noise and good grinding performance also includes a squeezing cylinder inserted into the juice collection tank. A groove is formed between the side of the opening and the bottom surface of the abutting part, so the upper end of the squeezing cylinder extends into the groove and abuts against the bottom surface of the abutting part.

6. The juicer of claim 4, wherein The inner side of the step surface is flush with the inner side of the abutment portion.

7. The low noise juicer with good grinding performance according to claim 1, characterized in that, The lower end of the upper connecting surface is smoothly connected to the upper end of the lower connecting surface.

8. The low noise juicer with good grinding performance according to claim 1, characterized in that, 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 rotating area.

9. The low noise juicer with good grinding performance according to claim 1, characterized in that, Both the upper connecting surface and the lower connecting surface are curved upwards from the center outwards.

10. The low noise juicer with good grinding performance according to claim 1, characterized in that, The pre-cutting component also includes a second cutting edge that extends spirally upward at the center of rotation. The tips of the first and second cutting edges are arranged opposite each other in the circumferential direction. The first and second cutting edges surround a cutting rotation zone located inside the annular rotation zone along the rotation direction of the screw.

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