Knife assembly and meat grinder

Abstract

This utility model discloses a blade assembly and a meat grinder. The blade assembly includes a rotating shaft, a collection chamber, and at least two blades. The collection chamber is fixed to one end of the rotating shaft, and the fixed ends of the two blades are radially and retractably fixed within the collection chamber along the rotating shaft. This utility model, through the radially retractable design of the blades, allows for flexible adjustment of the working length of the blades to adapt to the cutting needs of meats of different thicknesses, improving cutting efficiency and uniformity. It effectively solves the problems of poor adaptability and uneven cutting caused by traditional fixed-length blades, while also reducing the frequency of blade replacement and maintenance costs, thus improving the overall performance of the meat grinder.

Description

Technical Field

[0001] This utility model relates to the field of food processing equipment technology, and in particular to a cutting tool assembly and a meat grinder. Background Technology

[0002] Currently, meat grinders generally use fixed-length blades for cutting and grinding, but this has several limitations in practical applications. First, fixed-length blades are difficult to adapt to processing meat slices of varying thicknesses. For example, when processing thick pieces of meat, incomplete cutting or uneven particle size can easily occur, affecting the quality of the minced meat. Second, different types of meat (such as pork and beef) have significant differences in fiber structure and thickness, making it difficult for a single blade to handle multiple ingredients, resulting in insufficient applicability. Furthermore, a mismatch between the cutting stroke and the thickness of the meat slices reduces efficiency; for example, if the blade is too short, multiple cuts are required, increasing processing time. While changing to blades of different lengths can improve cutting results, frequent changes are cumbersome and increase blade inventory and costs, failing to meet the demands for efficient and convenient processing. Utility Model Content

[0003] The present invention provides a knife assembly and a meat grinder, which aims to solve the problem that existing fixed-length knives are difficult to handle different types and thicknesses of meat, resulting in incomplete cutting and low cutting efficiency.

[0004] This utility model provides a cutting tool assembly, including: a rotating shaft, a collection chamber, and at least two cutting blades. The collection chamber is fixed to one end of the rotating shaft, and the fixed ends of the two cutting blades are retractably fixed in the collection chamber along the radial direction of the rotating shaft.

[0005] Furthermore, the fixed end of the blade extends radially along the rotation axis and is at least partially located within the axial projection region of the rotation axis.

[0006] Furthermore, the fixed end of the blade extends radially along the rotation axis, and its end extends beyond the axial projection area of ​​the rotation axis.

[0007] Furthermore, the fixed ends of the two blades are arranged in a staggered, parallel configuration.

[0008] Furthermore, the blade assembly also includes a fixing member, and the fixed end of the blade is provided with an adjustment part for adjusting the blade length arranged radially along the rotation axis. The fixing member is fixedly connected to the adjustment part to fix the blade in the collection chamber.

[0009] Furthermore, the adjustment part includes at least one set of adjustment holes, each set of adjustment holes including multiple adjustment holes arranged radially along the rotation axis, and the upper and / or lower axial surfaces of the collection chamber are provided with at least one fixing hole, and the fixing member passes through the fixing hole and is fixedly connected to the adjustment hole.

[0010] Furthermore, the tool assembly also includes a connector. The end of the collection chamber near the rotating shaft is provided with a coaxial connection end. The coaxial connection end and the rotating shaft are aligned on the same axis. The coaxial connection end is provided with a first connection hole. One end of the rotating shaft is provided with a second connection hole. The two ends of the connector are respectively connected to the first connection hole and the second connection hole to fix the rotating shaft and the collection chamber coaxially.

[0011] Furthermore, the diameter d1 of the fixing hole satisfies 2.5mm ≤ d1 ≤ 3.5mm, the depth L1 of the fixing hole satisfies 6mm ≤ L1 ≤ 9mm, and the distance L2 between two adjacent fixing holes satisfies 7.5mm ≤ L2 ≤ 12.5mm; and / or,

[0012] The adjustment hole d2 satisfies 2.5mm ≤ d2 = d1 ≤ 3.5mm, the width spacing L3 between two adjacent sets of adjustment holes satisfies 7.5mm ≤ L3 = L2 ≤ 12.5mm, and the length spacing L4 between two adjacent adjustment holes satisfies 8mm ≤ L4 ≤ 12mm; and / or,

[0013] The diameter d3 of the connector is the same as the diameter of the first connecting hole and satisfies 2.5mm≤d3≤3.5mm. The depth L5 of the first connecting hole satisfies 8mm≤L5≤10mm. The length L6 of the connector satisfies 16mm≤L6=2L5≤20mm. The diameter d4 of the second connecting hole satisfies 2.5mm≤d4=d3≤3.5mm. The depth L7 of the second connecting hole satisfies 8mm≤L7=L5≤10mm.

[0014] Furthermore, each of the two opposing side walls of the collection chamber is provided with a receiving groove. The receiving groove extends radially from one side wall of the collection chamber toward the rotating shaft and forms an opening on the side wall of the collection chamber. The fixed end of the blade extends into the opening and is disposed in the receiving groove.

[0015] This utility model also provides a meat grinder, including the aforementioned blade assembly.

[0016] This utility model provides a knife assembly and a meat grinder. The knife assembly includes a rotating shaft, a collection chamber, and at least two blades. The collection chamber is fixed at one end of the rotating shaft and is used to fix the blades. The fixed ends of the two blades are retractably fixed in the collection chamber along the radial direction of the rotating shaft. When it is necessary to change the length of the blades, by adjusting the position of the fixed ends of the blades in the collection chamber, the blades can be extended outward or inward a certain distance along the radial direction of the rotating shaft and then fixed, thereby realizing the adjustment of the blade length. This allows it to adapt to various types and thicknesses of meat, meet multiple processing needs, improve cutting efficiency, eliminate the need for frequent blade replacement, and is convenient to use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the tool assembly in an embodiment of the present invention;

[0019] Figure 2 This is an exploded structural diagram of the cutting tool assembly according to an embodiment of the present invention;

[0020] Figure 3 This is another exploded structural diagram of the tool assembly according to an embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional schematic diagram of the cutting tool assembly according to an embodiment of the present utility model;

[0022] Figure 5 This is another cross-sectional schematic diagram of the tool assembly according to an embodiment of the present utility model;

[0023] Figure 6 This is another cross-sectional schematic diagram of the tool assembly according to an embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the blade of the cutting tool assembly according to an embodiment of the present utility model;

[0025] Figure 8 This is a top view schematic diagram of the cutting tool assembly according to an embodiment of the present utility model;

[0026] Figure 9 This is a cross-sectional schematic diagram of the collection chamber of the tool assembly in an embodiment of the present utility model;

[0027] Figure 10 This is a cross-sectional schematic diagram of the rotation shaft of the tool assembly in an embodiment of the present invention; Attached image description:

[0029] 1. Rotating shaft; 11. Spline; 12. Second connecting hole; 2. Collection chamber; 21. Receiving groove; 22. Fixing hole; 23. Coaxial connecting end; 24. First connecting hole; 3. Blade; 31. Fixing end; 32. Cutting end; 33. Adjusting hole; 4. Fixing component; 5. Connecting component. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for explanation and understanding of this invention, and not for limiting it. Furthermore, in the accompanying drawings, structures that are similar or identical are indicated by the same reference numerals.

[0032] Existing meat grinders mostly use fixed-length blades for cutting, making it difficult to adapt to the processing needs of different types of meat (such as pork, beef, and poultry) and meat of varying thicknesses. Because the blade length is not adjustable, incomplete cutting and uneven minced meat are common when processing thicker pieces; furthermore, cutting efficiency decreases significantly when dealing with meats of varying textures, affecting processing quality. In addition, fixed blades require frequent replacement to adapt to different working conditions, increasing operational complexity and maintenance costs. Therefore, there is an urgent need for a flexible, adjustable blade assembly to improve the versatility and processing efficiency of meat grinders.

[0033] Please see Figures 1 to 10 , Figure 1 This is a schematic diagram of the structure of a cutting tool assembly according to an embodiment of the present utility model. The cutting tool assembly includes: a rotating shaft 1, a collection chamber 2, and at least two blades 3. The collection chamber 2 is fixed to one end of the rotating shaft 1, and the fixed ends 31 of the two blades 3 are retractably fixed in the collection chamber 2 along the radial direction of the rotating shaft 1.

[0034] Reference Figures 1-3Specifically, the rotating shaft 1 of the tool assembly is a cylindrical long shaft structure with different functional structures at both ends. One end is fixedly connected to the collection chamber 2, and the other end is machined with a standard spline 11 tooth profile for meshing with the motor output shaft to transmit torque. The collection chamber 2 is a rectangular structure, with its width greater than the diameter of the rotating shaft 1 to provide sufficient internal space. Figure 7 As shown, the blade 3 is forged from a single piece of high-carbon steel and consists of two parts: a straight fixed end 31 and an arc-shaped cutting end 32. The fixed end 31 has a positioning structure machined on its surface to lock its position in conjunction with the collection chamber 2. The cutting end 32 has an involute arc shape and continuous cutting edges milled on its edge. In the assembled state, the fixed end 31 of the blade 3 is embedded inside the collection chamber 2, and its embedding depth is adjustable. The cutting end 32 extends outward from one side of the collection chamber 2 to form an arc-shaped cutting structure. When the length of blade 3 needs to be adjusted, first loosen the fixing structure of blade 3, move blade 3 radially to change the insertion depth of the fixed end 31 in the collection chamber 2, and the length of the exposed cutting end 32 will change accordingly. After adjustment, tighten the fixing structure of blade 3 to complete the positioning. During operation, the motor drives the rotating shaft 1 to rotate through spline 11, which drives the collection chamber 2 and blade 3 to rotate synchronously. At this time, the arc-shaped cutting edge of the cutting end 32 cuts into the meat in a progressive manner, and uses the shearing force generated by the arc motion to cut the meat fibers. At the same time, the adjustable blade length can match the fiber strength and thickness requirements of different types of meat. The shorter setting is suitable for soft poultry meat to ensure the integrity of the cut, while the longer setting can effectively handle thick pieces of livestock meat and improve cutting efficiency. This structure realizes adaptive processing of various types of meat through mechanical length adjustment, which not only avoids incomplete cutting or energy loss caused by mismatched blade length, but also significantly improves the versatility and operating efficiency of the equipment. It should be noted that there are various structures for the fixed end 31 of the blade 3 to be retractably fixed in the collection chamber 2 in this embodiment, such as sliding groove telescopic structure, rack telescopic structure, worm telescopic structure, etc., which are not limited here.

[0035] In this embodiment, through a retractable and adjustable structural design, when processing meat of different thicknesses or fibrous structures, the depth of the fixed end 31 of the blade 3 inserted into the collection chamber 2 can be adjusted accordingly, thereby adjusting the exposed length of the blade 3 outside the collection chamber, i.e., the length of the cutting end 32: for thicker or more fibrous meat pieces, the length of the cutting end 32 used for cutting is increased to increase the single cutting stroke; for thinner or softer meat pieces, the length of the cutting end 32 is shortened to increase the cutting frequency. This adjustable structure avoids the problem of incomplete cutting caused by the mismatch between the cutting stroke and the thickness of the meat piece in traditional fixed-length blades, while reducing the number of repeated cuts and improving the overall cutting efficiency.

[0036] Reference Figure 4 and Figure 5In one embodiment, the fixed end 31 of the blade 3 extends radially along the rotating shaft 1 and is at least partially located within the axial projection area of ​​the rotating shaft 1. Specifically, the fixed end 31 of the blade 3 has a flat rectangular structure, and its length direction is arranged radially along the rotating shaft 1. In the installed state, the fixed end 31 extends inward from the side wall opening of the collection chamber 2 and at least partially enters the axial projection area of ​​the outer contour of the rotating shaft 1, that is, part of the structure of the fixed end 31 is located below the cylindrical space defined by the diameter of the rotating shaft 1. When the blade 3 is in the minimum working length state, the fixed end 31 extends into the collection chamber 2 to the maximum extent and is completely hidden within the projection area of ​​the rotating shaft 1. At this time, the overall structure of the blade 3 is most compact. This layout makes full use of the originally unused space area below the rotating shaft 1, so that the exposed length of the blade 3 in the fully retracted state is minimized. By shortening the lever arm length, the moment of inertia is effectively reduced. When the motor starts, the working speed can be quickly reached to reduce energy consumption. At the same time, when processing small pieces of meat, the slight extension of the blade 3 can meet the cutting requirements and avoid interference with other parts of the equipment. It is evident that this design, which hides the fixed end 31 within the projection area of ​​the rotating shaft 1, not only optimizes space utilization but also expands the applicability of the tool assembly by shortening the minimum working length, especially providing better adaptability for fine meat grinding operations.

[0037] Reference Figure 4 and Figure 5 In one embodiment, the fixed end 31 of the blade 3 extends radially along the rotation axis 1, and its end extends beyond the axial projection area of ​​the rotation axis 1. Specifically, the fixed end 31 of the blade 3 has a flat rectangular strip structure, which extends radially along the rotation axis 1 and penetrates the internal space of the collection chamber 2, with its end extending to the opposite side of the axial projection area of ​​the rotation axis 1. Specifically, the end of the fixed end 31 crosses the axis of the rotation axis 1 and extends to the opposite side of its radial section, so that the axial projection of the fixed end 31 on the rotation axis 1 completely covers the radial section of the rotation axis 1. This structural design allows the fixed end 31 of the blade 3 to make full use of the space on both sides of the rotation axis 1 for arrangement, further shortening the overall radial dimension of the blade 3 while maintaining the effective working length of the cutting end 32 of the blade 3, and achieving an ultra-compact design of the blade 3 by utilizing the space on both sides of the rotation axis 1.

[0038] Reference Figure 4 and Figure 5In one embodiment, the fixed ends 31 of the two blades 3 are arranged in a staggered, parallel configuration. Specifically, the fixed ends 31 of the two blades 3 adopt a layered arrangement structure, with one blade 3's fixed end 31 installed in the upper part of the collection chamber 2, and the other blade 3's fixed end 31 located in the lower part of the collection chamber 2. Furthermore, the upper blade 3 and the lower blade 3 partially overlap in the axial projection direction of the rotation axis 1, but due to the height difference, the fixed ends 31 of the two blades 3 do not interfere with each other in actual space. This staggered, parallel arrangement ensures that the two blades 3 remain in a non-contact state during radial extension and retraction adjustment, and even when both blades 3 are adjusted to their shortest length, their fixed ends 31 will not interfere with each other spatially. This arrangement makes efficient use of the three-dimensional space of the collection chamber 2, achieving a compact overall structure while maintaining the independence of the blades 3, making it particularly suitable for applications requiring multiple blades 3 but with limited radial space. When adjusting the length of the blades 3, the upper and lower blades 3 can operate independently without affecting each other, greatly improving ease of use. It is evident that this staggered arrangement scheme fundamentally solves the spatial interference problem in the multi-blade 3 system, providing a reliable structural basis for the modular expansion of the tool assembly.

[0039] Reference Figures 1-5In one embodiment, the blade assembly further includes a fixing member 4. The fixed end 31 of the blade 3 is provided with an adjusting part arranged radially along the rotation axis 1 for adjusting the length of the blade 3. The fixing member 4 is fixedly connected to the adjusting part to fix the blade 3 within the collection chamber 2. Specifically, the fixing member 4 is a functional component that can form a tight connection with the adjusting part, and its specific structure can be in the form of bolts, buckles, slots, or magnetic suction devices. The adjusting part is a functional area arranged radially along the rotation axis 1 on the fixed end 31 of the blade 3, and its specific structure can be in the form of slots, toothed grooves, positioning grooves, or magnetic adsorption areas. The specific structures of the fixing member 4 and the adjusting part are not limited here. The fixed end 31 of the blade 3, through the cooperation of the adjusting part and the fixing member 4, realizes the radial position adjustment and fixation of the blade 3 within the collection chamber 2. When it is necessary to adjust the length of the blade 3, the connection between the fixing member 4 and the adjusting part is released, allowing the blade 3 to slide radially along the collection chamber 2; after the blade 3 is adjusted to the target position, the fixing member 4 is reconnected to the adjusting part to lock the blade 3 within the collection chamber 2. For example, when the adjusting part consists of multiple positioning grooves distributed along the length of the fixed end, and the fixing element is an elastic buckle that can be inserted into the grooves, multi-level adjustment of the blade length is achieved by the cooperation of the buckle with the grooves at different positions. When the adjusting part is a strip-shaped through hole, and the fixing element is a bolt that passes through the through hole and is threadedly connected to the collection chamber, the sliding and fixing of the blade 3 is achieved by loosening or tightening the bolt. This structural design allows the blade length adjustment process to be carried out without completely disassembling the blade, simplifying the operation process. With the fixing element 4 cooperating with the adjusting part to achieve convenient length adjustment, the blade assembly can quickly adapt to the processing needs of different meats, improving adaptability and processing efficiency.

[0040] Reference Figure 7In this embodiment, the adjusting part includes at least one set of adjusting holes 33. Each set of adjusting holes 33 includes multiple adjusting holes 33 arranged radially along the rotation axis 1. The upper and / or lower axial surfaces of the collection chamber 2 are provided with at least one fixing hole 22. The fixing member 4 passes through the fixing hole 22 and is fixedly connected to the adjusting hole 33. Specifically, the adjusting part is composed of at least one set of adjusting holes 33 arranged radially along the rotation axis 1. Each set of adjusting holes 33 includes multiple circular through holes of the same diameter, and the holes are spaced evenly. The upper and / or lower axial surfaces of the collection chamber 2 are provided with fixing holes 22 that are adapted to the adjusting holes 33. The axis of the fixing hole 22 is parallel to the axis of the adjusting hole 33 and has the same diameter. The fixing member 4 is a cylindrical bolt or pin, and its outer diameter is clearance-fitted with the inner diameter of the adjusting hole 33 and the fixing hole 22. When the blade 3 slides to the target position within the collection chamber 2, the axis of the adjusting hole 33 coincides with that of the fixing hole 22. The fixing member 4 passes through the fixing hole 22 and the adjusting hole 33 in sequence, fixing the blade 3 to the collection chamber 2. For example, when the blade 3 needs to be shortened, it is slid inward into the collection chamber 2, aligning the adjusting hole 33 near the cutting end 32 with the fixing hole 22 on the collection chamber 2, and the fixing member 4 is inserted to lock it in place. Conversely, when the length needs to be increased, the blade 3 is slid outward, aligning the adjusting hole 33 away from the cutting end 32 with the fixing hole 22 and securing it. This design with multiple sets of adjusting holes 33 provides multiple length adjustment levels, allowing the blade 3 to be precisely adjusted according to the thickness and fiber characteristics of different meats. Through this multi-level adjustable fixing structure, the blade assembly can adapt to a wider range of meat processing needs while maintaining stable cutting performance, improving the applicability and processing quality of the equipment, while also being cost-effective and easy to operate.

[0041] Reference Figure 9In this embodiment, the collection chamber 2 has receiving grooves 21 on both opposite side walls. Each receiving groove 21 extends radially from one side wall of the collection chamber 2 toward the rotating shaft 1 and has an opening on that side wall. The fixed end 31 of the blade 3 extends into the opening and is positioned within the receiving groove 21. Specifically, the two side walls of the collection chamber 2 are symmetrically provided with parallel receiving grooves 21. Each receiving groove 21 extends inward from the outer side wall of the collection chamber 2 to form a guide channel, and a rectangular opening is formed at the outer edge of the side wall for the fixed end 31 of the blade 3 to be inserted. The width of the receiving groove 21 is adapted to the thickness of the fixed end 31 of the blade 3 to achieve precise guidance. The fixed ends 31 of the two blades 3 are inserted into the corresponding receiving grooves 21 from the openings on the left and right sides of the collection chamber 2, respectively, and their radial positions are fixed through the cooperation of the fixing member 4 and the adjusting part. The length of the receiving groove 21 is arranged radially along the rotating shaft 1, and its depth meets the accommodating requirements of the fixed end 31 of the blade 3 at its maximum adjustment stroke. This symmetrical arrangement of the receiving grooves 21 on both sides allows the two blades 3 to be installed and adjusted independently. Adjusting the length of one blade 3 does not interfere with the normal operation of the other blade 3. Furthermore, the groove walls of the receiving grooves 21 are tightly fitted to the surface of the fixed end 31 of the blade 3, forming a surface contact constraint during blade rotation. This effectively resists the torque generated by the cutting force, improving the stability of the blades 3. The precise guidance of the receiving grooves 21 on both sides ensures that the two blades 3 always remain parallel, resulting in stable cutting during high-speed rotation. When maintenance or replacement is required, the blades 3 can be easily removed from the corresponding side openings, greatly simplifying the disassembly and assembly process. Moreover, this arrangement of the receiving grooves 21 on both sides provides reliable structural support and a convenient operating experience for the tool assembly, while maintaining good scalability, allowing for the addition of more blades 3 as needed without changing the basic structural layout.

[0042] Reference Figures 1-3In one embodiment, the tool assembly further includes a connector 5. The collection chamber 2 has a coaxial connecting end 23 at one end near the rotating shaft 1. The coaxial connecting end 23 and the rotating shaft 1 have their axes coincident. The coaxial connecting end 23 has a first connecting hole 24, and one end of the rotating shaft 1 has a second connecting hole 12. Both ends of the connector 5 are connected to the first connecting hole 24 and the second connecting hole 12 respectively to coaxially fix the rotating shaft 1 and the collection chamber 2. Specifically, the end of the collection chamber 2 near the rotating shaft 1 extends to form a cylindrical coaxial connecting end 23. The outer diameter of this connecting end is approximately the same as the outer diameter of the rotating shaft 1, and their axes coincide. Multiple first connecting holes 24 are evenly distributed along the circumferential direction on the end face of the coaxial connecting end 23. The first connecting holes 24 are blind holes, and their axes are parallel to the axis of the rotating shaft 1. The corresponding end face of the rotating shaft 1 has a second connecting hole 12, which is equal in number and position to the first connecting hole 24. The second connecting hole 12 is a through hole or a blind hole, and its inner diameter is the same as the inner diameter of the first connecting hole 24. The connecting member 5 is a cylindrical connecting pin, whose outer diameter is clearance-fitted with the inner diameter of the first and second connecting holes 12, and whose length is greater than the depth of the first connecting hole 24. During installation, the coaxial connecting end 23 of the collection chamber 2 is brought into contact with the end face of the rotating shaft 1, so that the first connecting hole 24 and the second connecting hole 12 correspond one-to-one. Then, the connecting pin is inserted into the second connecting hole 12 and the first connecting hole 24 in sequence until the end of the connecting pin is completely sunk into the first connecting hole 24. During installation, the connecting pin is first inserted into the first connecting hole 24 on the coaxial connecting end 23, and then the second connecting hole 12 on the rotating shaft 1 is aligned with the insertion of the connecting pin, thereby fixing the two. For example, when three connecting pins are evenly distributed around the circumference, a stable three-point connection structure can be formed. This coaxial fixing structure achieves a rigid connection between the rotating shaft 1 and the collection chamber 2 through the engagement of the connecting pin and the cylindrical surface of the connecting hole. When the blade assembly rotates at high speed, the coaxial connection ensures that the rotation centers of the rotating shaft 1 and the collection chamber 2 coincide. Based on the mechanical characteristics of rotating bodies, this design reduces centrifugal force caused by eccentricity, thus lowering vibration and noise. Through this connection method, the driving force of the rotating shaft 1 can be efficiently and smoothly transmitted to the blade 3, improving cutting efficiency and meat processing quality. Simultaneously, precise coaxiality control effectively reduces the risk of dynamic imbalance in rotating components, ensuring the stability of the equipment during high-speed operation.

[0043] In other embodiments, the rotating shaft 1 and the collection chamber 2 can also be an integral structure. Separate rotating shaft 1 and knife storage chamber make disassembly, cleaning, and storage easier when the meat grinder is not in use. An integral structure offers higher strength and better stability.

[0044] Reference Figure 6In this embodiment, the diameter d1 of the fixing hole 22 satisfies 2.5mm ≤ d1 ≤ 3.5mm, the hole depth L1 satisfies 6mm ≤ L1 ≤ 9mm, and the distance L2 between two adjacent fixing holes 22 satisfies 7.5mm ≤ L2 ≤ 12.5mm. Specifically, the diameter d1 of the fixing hole 22 is designed to be 2.5-3.5mm. This size range has been repeatedly verified: when the hole diameter is less than 2.5mm, the strength of the fixing member 4 is insufficient, which may lead to the tool not being firmly fixed; while the hole diameter exceeds 3.5mm, it will weaken the structural strength of the tool storage compartment. The hole depth L1 is designed to be 6-9mm. This depth can ensure that the fixing member 4 has sufficient connection length to provide a stable fixing effect, and can also avoid affecting the overall structural strength of the tool storage compartment due to excessive hole depth. The center distance L2 between adjacent fixing holes 22 is designed to be 7.5-12.5mm. This reasonable hole spacing ensures that each fixing hole 22 can fully play its fixing role and ensures that the force on the tool is evenly distributed during use, thereby improving the overall fixing effect and durability.

[0045] Reference Figure 7 In this embodiment, the diameter d2 of the adjustment hole 33 satisfies 2.5mm ≤ d2 = d1 ≤ 3.5mm, the width spacing L3 between two adjacent sets of adjustment holes 33 satisfies 7.5mm ≤ L3 = L2 ≤ 12.5mm, and the length spacing L4 between two adjacent adjustment holes 33 satisfies 8mm ≤ L4 ≤ 12mm. Specifically, the diameter d2 of the adjustment hole 33 and the fixing hole 22 d1 adopt the same size standard (2.5-3.5mm). This equal diameter design ensures that the fixing member 4 can form a precise fit with the adjustment hole 33, achieving gapless positioning. In the width direction of the blade, the spacing L3 between adjacent adjustment holes 33 is consistent with the spacing L2 of the fixing hole 22 (7.5-12.5mm). This symmetrical layout ensures that the tool remains stably centered during the adjustment process. The multiple rows of adjustment holes 33 arranged along the length of the blade have an adjacent row spacing L4 controlled within the range of 8-12mm. This gradient design ensures that a single adjustment produces a significant change in cutting length while also ensuring a smooth transition between adjacent settings. This hole arrangement scheme, by aligning the storage compartment fixing hole 22 with any row of adjustment holes 33, enables multi-level precise adjustment of the blade's working length, effectively adapting to the cutting and mincing needs of different types of meat.

[0046] Reference Figure 9 and Figure 10In this embodiment, the diameter d3 of the connector 5 is the same as the diameter of the first connecting hole 24 and satisfies 2.5mm≤d3≤3.5mm, the hole depth L5 of the first connecting hole 24 satisfies 8mm≤L5≤10mm, the length L6 of the connector 5 satisfies 16mm≤L6=2L5≤20mm, the hole diameter d4 of the second connecting hole 12 satisfies 2.5mm≤d4=d3≤3.5mm, and the hole depth L7 of the second connecting hole 12 satisfies 8mm≤L7=L5≤10mm. Specifically, the connector 5 is designed with the same diameter as the connecting hole (d3 = d4 = 2.5-3.5 mm). This precision fit ensures that the connector 5 and the hole wall form a tight contact, realizing gapless power transmission. The depth L5 of the connecting hole of the collection chamber 2 and the depth L7 of the connecting hole of the rotating shaft 1 are both set to 8-10 mm. This depth range can provide sufficient connection strength and maintain the structural integrity of the connection part. The length L6 of the connector 5 is designed to be twice the hole depth (16-20 mm), so that it can completely penetrate the connecting holes of the collection chamber 2 and the rotating shaft 1, and generate a fixing effect on both connecting surfaces at the same time. This symmetrical connection structure design not only ensures accurate alignment during assembly, but also maintains stable connection performance under high-speed rotation conditions, effectively preventing connection loosening caused by vibration.

[0047] This utility model embodiment also provides a meat grinder, including the blade assembly described in the above embodiments. This blade assembly has been described in detail in the above embodiments, and for the sake of brevity, it will not be repeated here.

[0048] Specifically, by employing the aforementioned blade assembly, the meat grinder of this embodiment achieves flexible adjustment of the blade length and optimized spatial layout, allowing for rapid adjustment of the cutting length according to different meat characteristics and processing requirements. The motor is connected to the rotating shaft 1 via a spline 11, driving the adjustable blade 3 to complete efficient cutting operations. The structural design of the collection chamber 2 ensures the stability of the blade 3 while facilitating disassembly and maintenance. The entire machine has a compact structure, is easy to operate, and significantly improves the adaptability and production efficiency of meat grinding.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A cutting tool assembly, characterized in that, include: The device comprises a rotating shaft, a collection chamber, and at least two blades, wherein the collection chamber is fixed to one end of the rotating shaft, and the fixed ends of the two blades are retractably fixed within the collection chamber along the radial direction of the rotating shaft.

2. The cutting tool assembly according to claim 1, characterized in that, The fixed end of the blade extends radially along the rotation axis and is at least partially located within the axial projection area of ​​the rotation axis.

3. The cutting tool assembly according to claim 1, characterized in that, The fixed end of the blade extends radially along the rotation axis, and its end extends beyond the axial projection area of ​​the rotation axis.

4. The cutting tool assembly according to claim 1, characterized in that, The fixed ends of the two blades are arranged in a staggered, parallel configuration.

5. The cutting tool assembly according to any one of claims 1-4, characterized in that, The blade assembly also includes a fixing member, and the fixed end of the blade is provided with an adjustment part arranged radially along the rotation axis for adjusting the blade length. The fixing member is fixedly connected to the adjustment part to fix the blade in the collection chamber.

6. The cutting tool assembly according to claim 5, characterized in that, The adjustment part includes at least one set of adjustment holes, and each set of adjustment holes includes multiple adjustment holes arranged radially along the rotation axis. The upper axial surface and / or lower axial surface of the collection chamber are provided with at least one fixing hole, and the fixing member passes through the fixing hole and is fixedly connected to the adjustment hole.

7. The cutting tool assembly according to claim 6, characterized in that, The tool assembly also includes a connector. The end of the collection chamber near the rotating shaft is provided with a coaxial connection end. The coaxial connection end and the rotating shaft are aligned on the same axis. The coaxial connection end is provided with a first connection hole. One end of the rotating shaft is provided with a second connection hole. The two ends of the connector are respectively connected to the first connection hole and the second connection hole to fix the rotating shaft and the collection chamber coaxially.

8. The cutting tool assembly according to claim 7, characterized in that, The diameter d1 of the fixing hole satisfies 2.5mm ≤ d1 ≤ 3.5mm, the depth L1 of the fixing hole satisfies 6mm ≤ L1 ≤ 9mm, and the distance L2 between two adjacent fixing holes satisfies 7.5mm ≤ L2 ≤ 12.5mm; and / or, The adjustment hole d2 satisfies 2.5mm ≤ d2 = d1 ≤ 3.5mm, the width spacing L3 between two adjacent sets of adjustment holes satisfies 7.5mm ≤ L3 = L2 ≤ 12.5mm, and the length spacing L4 between two adjacent adjustment holes satisfies 8mm ≤ L4 ≤ 12mm; and / or, The diameter d3 of the connector is the same as the diameter of the first connecting hole and satisfies 2.5mm≤d3≤3.5mm. The depth L5 of the first connecting hole satisfies 8mm≤L5≤10mm. The length L6 of the connector satisfies 16mm≤L6=2L5≤20mm. The diameter d4 of the second connecting hole satisfies 2.5mm≤d4=d3≤3.5mm. The depth L7 of the second connecting hole satisfies 8mm≤L7=L5≤10mm.

9. The cutting tool assembly according to claim 5, characterized in that, The collection chamber has accommodating grooves on both opposite side walls. The accommodating grooves extend radially from one side wall of the collection chamber toward the rotating shaft and form openings on the side wall of the collection chamber. The fixed end of the blade extends into the opening and is located in the accommodating groove.

10. A meat grinder, characterized in that, Includes the cutting tool assembly as described in any one of claims 1-9.

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