Detachable knife assembly structure of juicer

Abstract

The utility model relates to a detachable knife assembly structure of a juicer, which comprises a cup body, a transmission part and a knife assembly, the transmission part comprises an upper connecting section used for connecting the knife assembly and a lower connecting section used for connecting a motor rotating shaft, and the upper connecting section is a polygonal shaft with a lead angle; the cutter assembly is provided with a slot matched with the lower connecting section in shape; the transmission part is arranged at the bottom of the cup body in a rotating mode, the upper connecting section of the transmission part extends into an inner cavity of the cup body, and the lower connecting section of the transmission part extends out of the cup body. And the cutter assembly is connected with the transmission part. The polygonal upper connecting section with the lead angle is matched with the cutter assembly inserting groove, the self-tightening effect can be generated after the cutter assembly is in place, centrifugal force generated when the blade rotates at a high speed can generate axial negative pressure in the lead angle direction, and the cutter assembly is made to be tightly attached to the bottom of the cup body. The upward floating or loosening phenomenon of the cutter assembly caused by vibration or fluid counter-acting force in a traditional structure is eradicated, and therefore the crushing efficiency and the operation stability are guaranteed.

Description

Technical Field

[0001] This utility model relates to the structure of a detachable blade assembly for a juicer. Background Technology

[0002] With increasing attention to healthy eating, juicers (also known as blenders, high-speed blenders, etc.) are widely used in both home and commercial settings. The core components of a juicer are the blade assembly and transmission mechanism. A motor drives the transmission mechanism to rotate the blades at high speed, cutting and crushing fruits, vegetables, and other ingredients to extract juice.

[0003] To facilitate cleaning and assembly, various detachable knife assembly designs have emerged on the market, typically consisting of three parts: a drive shaft at the bottom of the cup, the knife assembly, and a fixing device.

[0004] Existing detachable tool assemblies mostly use cylindrical or star-shaped splined shafts that mate with corresponding slots, achieving connection through lateral locking or elastic jaws. However, in actual use, they have the following shortcomings:

[0005] When the material is subjected to centrifugal force and fluid reaction force during the juicing process, if the connection structure relies on a single radial clamping force or elastic element, it is often difficult to completely resist the upward trend of the blade assembly, which causes the blade assembly and the transmission component to slide relative to each other, affecting the crushing efficiency and possibly causing abnormal noise or mechanical collision.

[0006] Traditional structures fail to create effective negative pressure between the blade assembly and the inner cavity of the cup, making it easy for material to flow back or leak between the blade and the cup wall, which reduces the efficiency of the juicing process and leaves residue during cleaning.

[0007] To prevent loosening, many designs require pre-tightening of the blade assembly or the use of additional springs and washers during assembly, which increases the difficulty of operation for users. At the same time, additional tools are required for cleaning, which reduces the user experience. Utility Model Content

[0008] The purpose of this invention is to provide a detachable blade assembly structure that is reliable in connection, easy to install, and can maintain negative pressure during rotation to ensure that the blade assembly does not float.

[0009] The purpose of this utility model is achieved as follows:

[0010] A detachable blade assembly structure for a juicer includes a cup body, a transmission component, and a blade assembly. The transmission component includes an upper connecting section for connecting the blade assembly and a lower connecting section for connecting a motor shaft. The upper connecting section is a polygonal shaft with a helical angle.

[0011] The blade assembly has a slot that matches the shape of the lower connecting section;

[0012] The transmission component is rotatably mounted at the bottom of the cup body, with the upper connecting section of the transmission component extending into the inner cavity of the cup body and the lower connecting section of the transmission component extending out of the cup body.

[0013] The blade assembly is placed inside the cup body cavity, and the upper connecting section is inserted into the slot and locked in place, thereby connecting the blade assembly and the transmission component.

[0014] The polygonal upper connecting section with a helical angle is used to cooperate with the blade assembly slot, which can produce a self-tightening effect after the blade assembly is in place. The centrifugal force generated by the blade when it rotates at high speed will generate axial negative pressure along the helical angle direction, so that the blade assembly is tightly attached to the bottom of the cup body. This eliminates the floating or loosening phenomenon of the blade assembly due to vibration or fluid reaction force in the traditional structure, thus ensuring crushing efficiency and stable operation.

[0015] Because the engagement of the polygonal shaft and the slot directly achieves a gapless connection between the blade assembly and the transmission components, it eliminates the need for additional springs, snap rings, or pre-tightening devices, simplifying the assembly and disassembly process. At the same time, the negative pressure generated during rotation can further improve the sealing of the inner cavity of the cup, reduce juice backflow and residue retention, and improve juicing efficiency and ease of cleaning.

[0016] This structure not only improves the locking reliability and safety of the blade assembly, but also reduces user maintenance costs and enhances the overall durability and user experience of the juicer.

[0017] The objective of this utility model can also be achieved by the following technical measures:

[0018] Furthermore, the upper connecting segment is a hexagonal shaft with a helix angle.

[0019] The hexagonal upper connecting section with a helix angle allows the six facets to make full circumferential contact with the blade assembly slot, significantly enhancing the transmission efficiency of torque and preventing slippage under high loads. At the same time, the helix angle design continuously generates axial tension during rotation, making the blade assembly fit more firmly against the bottom of the cup and effectively suppressing the upward movement of the blade assembly caused by centrifugal force and fluid reaction.

[0020] Furthermore, it also includes a connecting seat, which has a receiving cavity, and the top surface of the connecting seat has a through hole communicating with the receiving cavity. The top surface of the connecting seat is provided with wear-resistant plastic.

[0021] The bottom of the cup body has an installation port, the connecting seat is set at the installation port, and the wear-resistant plastic enters the inner cavity of the cup body;

[0022] The transmission component is further provided with a disc, the upper end face of which is provided with the upper connecting section, and the lower end face of which is provided with the lower connecting section;

[0023] The transmission component sits inside the inner cavity of the cup, the lower connecting section extends out of the cup through the through hole, and the lower end face of the disc contacts the wear-resistant plastic.

[0024] By setting wear-resistant plastic on the top surface of the connector and partially inserting it into the inner cavity of the cup, this structure forms a soft-hard combined contact surface at the connection between the lower end face of the transmission disc and the cup body. The wear-resistant plastic can withstand the high-speed rotation and friction of the disc, and effectively isolate the direct wear between the metal and the plastic, avoiding the shedding of abrasive particles or the adhesion of molten material caused by high-speed operation, thereby greatly improving the wear resistance and service life of the connection part.

[0025] The connecting seat has a receiving cavity and a through hole, allowing the lower connecting section of the transmission component to pass smoothly through the bottom of the cup and connect with the motor shaft; the wear-resistant plastic not only plays a role in bearing and guiding, but also forms a stable lateral support for the disc during rotation, suppressing vibration and sway during operation, and further ensuring the smoothness and safety of the knife assembly operation.

[0026] By relying on the close contact between the wear-resistant plastic and the disc, efficient anti-wear, anti-leakage and shock absorption effects can be achieved, significantly improving the overall reliability of the juicer and the user experience.

[0027] Furthermore, it also includes a lower connector and an oil seal ring. The top of the lower connector is provided with a column with a threaded hole. The inner cavity of the lower connector is a cavity that matches the shape of the motor shaft. The bottom of the lower connector has an opening that communicates with the cavity. The threaded hole, the cavity, and the opening are connected.

[0028] The lower connecting section is a threaded section;

[0029] The oil seal ring is fitted onto the column, and the lower connector is placed in the receiving cavity of the connector. The threaded section of the transmission component passes through the through hole of the connector and locks the threaded hole of the lower connector, thereby connecting the transmission component and the lower connector. The upper end face of the oil seal ring is in close contact with the inner wall of the connector, and the lower end face of the oil seal ring is in close contact with the top of the lower connector.

[0030] The threaded section directly meshes with the threaded hole of the cylinder, enabling the transmission component and the lower connector to achieve a self-locking connection during assembly, eliminating the need for additional fasteners or snap rings and simplifying the structure and operation process; at the same time, the threaded connection has high torsional resistance, ensuring stable and reliable torque transmission under high speed and heavy load, without loosening or slippage.

[0031] The oil seal ring fits tightly against the inner wall of the connector and the top of the lower connector, forming a double seal from top to bottom. This effectively prevents media such as juice, small fruit pulp particles, and cleaning water from entering the joint between the transmission component and the motor shaft, preventing internal parts from being corroded or scaled by liquids, thereby significantly improving the overall waterproof and leak-proof performance and system durability.

[0032] The lower connector's inner cavity is shaped to match the motor shaft, and it connects to the internal cavity through the bottom opening, thus ensuring coaxial torque transmission.

[0033] The beneficial effects of this utility model are as follows:

[0034] This invention employs a polygonal upper connecting section with a helical angle to cooperate with the blade assembly slot, which can produce a self-tightening effect after the blade assembly is in place. The centrifugal force generated by the blade during high-speed rotation will generate axial negative pressure along the helical angle direction, making the blade assembly tightly adhere to the bottom of the cup body. This eliminates the floating or loosening phenomenon of the blade assembly due to vibration or fluid reaction force in traditional structures, thereby ensuring crushing efficiency and stable operation.

[0035] This invention achieves a gapless connection between the blade assembly and the transmission component by directly engaging the polygonal shaft and the slot, eliminating the need for additional springs, snap rings, or pre-tightening devices, thus simplifying the assembly and disassembly process. At the same time, the negative pressure generated during rotation can further improve the sealing of the inner cavity of the cup, reduce juice backflow and residue retention, and improve juicing efficiency and ease of cleaning.

[0036] This invention, by setting wear-resistant plastic on the top surface of the connecting seat and partially inserting it into the inner cavity of the cup, forms a soft-hard combined contact surface at the connection between the lower end face of the transmission disc and the cup body. The wear-resistant plastic can withstand the high-speed rotation and friction of the disc, and effectively isolate the direct wear between the metal and the plastic, avoiding the shedding of abrasive particles or the adhesion of molten adhesive caused by high-speed operation, thereby greatly improving the wear resistance and service life of the connecting parts. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of a cup body with a blade assembly installed.

[0038] Figure 2 This is another angled view of the cup body with the blade assembly installed.

[0039] Figure 3 for Figure 1 A sectional view.

[0040] Figure 4 A cross-sectional view of the cup body (excluding the cup body) with the knife assembly installed.

[0041] Figure 5 This is an assembly drawing of the cutter assembly, transmission components, lower connector, oil seal ring, and cup body.

[0042] Figure 6 This is an assembly drawing of the cutter assembly, transmission components, lower connector, oil seal ring, connecting seat, and cup body.

[0043] Figure 7This is another assembly view of the blade assembly, transmission components, lower connector, oil seal ring, connecting seat, and cup body.

[0044] Figure 8 This is a schematic diagram of the blade assembly.

[0045] Figure 9 This is a schematic diagram of the blade assembly from another angle.

[0046] Figure 10 This is a schematic diagram of the transmission components.

[0047] Figure 11 This is the front view of the transmission component. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0049] Implementation examples, in conjunction with Figures 1 to 11 As shown, a detachable blade assembly structure for a juicer includes a cup body 1, a transmission component 2, and a blade assembly 3. The transmission component 2 includes an upper connecting section 4 for connecting the blade assembly 3 and a lower connecting section 5 for connecting the motor shaft. The upper connecting section 4 is a polygonal shaft with a helical angle.

[0050] The blade assembly 3 has a slot 31 that matches the shape of the lower connecting section 5;

[0051] The transmission component 2 is rotatably mounted at the bottom of the cup body 1. The upper connecting section 4 of the transmission component 2 extends into the inner cavity of the cup body 1, and the lower connecting section 5 of the transmission component 2 extends out of the cup body 1.

[0052] The blade assembly 3 is placed inside the cup body 1, and the upper connecting section 4 is inserted into the slot 31 and locked in place, thereby connecting the blade assembly 3 and the transmission component 2.

[0053] Furthermore, the upper connecting segment 4 is a hexagonal shaft with a helix angle.

[0054] Furthermore, it also includes a connecting seat 6, which has a receiving cavity 61, a through hole 62 communicating with the receiving cavity 61 on the top surface of the connecting seat 6, and a wear-resistant plastic 63 provided on the top surface of the connecting seat 6.

[0055] The bottom of the cup body 1 has an installation port 11, the connecting seat 6 is set at the installation port 11, and the wear-resistant plastic 63 enters the inner cavity of the cup body 1.

[0056] The transmission component 2 is also provided with a disc 7, the upper end face of the disc 7 is provided with the upper connecting section 4, and the lower end face of the disc 7 is provided with the lower connecting section 5;

[0057] The transmission component 2 sits inside the cup body 1, the lower connecting section 5 extends out of the cup body 1 through the through hole 62, and the lower end face of the disc 7 contacts the wear-resistant plastic 63.

[0058] Furthermore, it also includes a lower connector 8 and an oil seal ring 9. The top of the lower connector 8 is provided with a column 82 with a threaded hole 81. The inner cavity of the lower connector 8 is a cavity 83 that matches the shape of the motor shaft. The bottom of the lower connector 8 has an opening 84 that communicates with the cavity 83. The threaded hole 81, the cavity 83 and the opening 84 are connected.

[0059] The lower connecting section 5 is a threaded section;

[0060] The oil seal ring 9 is fitted onto the column 82, and the lower connector 8 is placed in the receiving cavity 61 of the connecting seat 6. The threaded section of the transmission component 2 passes through the through hole 62 of the connecting seat 6 and locks the threaded hole 81 of the lower connector 8, thereby connecting the transmission component 2 and the lower connector 8. The upper end face of the oil seal ring 9 is in close contact with the inner wall of the connecting seat 6, and the lower end face of the oil seal ring 9 is in close contact with the top of the lower connector 8.

[0061] When the hexagonal shaft with a helix angle rotates at high speed with the motor, its facets and the slot 31 of the blade assembly 3 act like a miniature screw pump, squeezing the air and liquid in the bottom space of the cup outward along the helix angle direction, forming a vacuum zone with increased local flow velocity and reduced pressure. This generates a negative pressure "adsorption" force between the blade assembly 3 and the bottom of the cup body 1. This axial suction force not only counteracts the centrifugal force and fluid reaction force, preventing the blade assembly 3 from floating or loosening, but also effectively blocks the backflow of juice and pulp, significantly improving the connection firmness, sealing and juicing efficiency.

Claims

1. A detachable blade assembly structure for a juicer, comprising a cup body, a transmission component, and a blade assembly, characterized in that: The transmission component includes an upper connecting section for connecting the blade assembly and a lower connecting section for connecting the motor shaft. The upper connecting section is a polygonal shaft with a helix angle. The blade assembly has a slot that matches the shape of the lower connecting section; The transmission component is rotatably mounted at the bottom of the cup body, with the upper connecting section of the transmission component extending into the inner cavity of the cup body and the lower connecting section of the transmission component extending out of the cup body. The blade assembly is placed inside the cup body cavity, and the upper connecting section is inserted into the slot and locked in place, thereby connecting the blade assembly and the transmission component.

2. The detachable blade assembly structure of the juicer according to claim 1, characterized in that: The upper connecting section is a hexagonal shaft with a helical angle.

3. The detachable blade assembly structure of the juicer according to claim 1, characterized in that: It also includes a connecting seat, which has a receiving cavity, and the top surface of the connecting seat has a through hole communicating with the receiving cavity. The top surface of the connecting seat is provided with wear-resistant plastic. The bottom of the cup body has an installation port, the connecting seat is set at the installation port, and the wear-resistant plastic enters the inner cavity of the cup body; The transmission component is further provided with a disc, the upper end face of which is provided with the upper connecting section, and the lower end face of which is provided with the lower connecting section; The transmission component sits inside the cup's inner cavity, the lower connecting section extends out of the cup through the through hole, and the lower end face of the disc contacts the wear-resistant plastic.

4. The detachable blade assembly structure of the juicer according to claim 3, characterized in that: It also includes a lower connector and an oil seal ring. The top of the lower connector is provided with a column with a threaded hole. The inner cavity of the lower connector is a cavity that matches the shape of the motor shaft. The bottom of the lower connector has an opening that communicates with the cavity. The threaded hole, the cavity and the opening are connected. The lower connecting section is a threaded section; The oil seal ring is fitted onto the column, and the lower connector is placed in the receiving cavity of the connector. The threaded section of the transmission component passes through the through hole of the connector and locks the threaded hole of the lower connector, thereby connecting the transmission component and the lower connector. The upper end face of the oil seal ring is in close contact with the inner wall of the connector, and the lower end face of the oil seal ring is in close contact with the top of the lower connector.

Images