A head assembly for a meat grinder

Abstract

The utility model provides a kind of head device for meat grinder, including fuselage, auger and transmission shaft. Fuselage is provided with feeding port, front end inlay hole plate, and detachably sleeved with head. Auger is located in the inside of fuselage, and its front end is connected with reamer through square shaft, the diameter of auger shaft gradually increases from tail to head, forming progressive compression structure, to improve material conveying efficiency and discharging uniformity. The scheme cancels the bearing inside the head, avoids lubricating grease to contaminate food materials, and improves food safety; The design of conical auger improves extrusion efficiency; Split transmission structure is convenient to disassemble and maintain. The overall structure is compact, suitable for various types of bench and cabinet meat grinder, with good hygiene, reliability and multifunctionality.

Description

Technical Field

[0001] This utility model belongs to the field of meat grinder technology, and more specifically, it relates to a head device for a meat grinder. Background Technology

[0002] In the field of meat processing technology, meat grinders are widely used equipment, and the structural design of their core component, the head assembly, directly affects the equipment's working efficiency, food hygiene and safety, and service life.

[0003] Traditional meat grinders typically use bearings inside the machine head to support the square shaft at the front of the auger for rotational transmission. However, this structure has significant drawbacks: firstly, the built-in bearings require lubrication, and over time, grease leakage can occur, contaminating food and affecting food safety; secondly, the complex internal structure of the machine head makes cleaning difficult, failing to meet high standards of food hygiene. Furthermore, existing augers often feature a uniform diameter central shaft design, which can easily lead to uneven pressure distribution during material feeding, resulting in poor discharge, material backflow, or low extrusion efficiency, affecting the uniformity of meat grinding and production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a head device for a meat grinder, which solves problems such as grease contamination, uneven material output, and inconvenient disassembly and assembly in the prior art by optimizing the transmission structure and auger design, thereby improving the hygiene, efficiency and reliability of the equipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A head assembly for a meat grinder, comprising:

[0007] The machine body is a hollow cylindrical structure with a feeding port on the upper side. A perforated plate is embedded in the front end of the machine body, and a machine head is detachably sleeved on the front end of the machine body. A machine head fixing seat is provided at the rear end of the machine body, and a machine head base is connected to the rear end of the machine head fixing seat.

[0008] An auger is rotatably mounted in the machine body. A reamer is mounted at the front end of the auger via a square shaft. The other end of the square shaft is rotatably inserted into the machine head. The diameter of the central shaft of the auger gradually increases from the tail end to the head end.

[0009] The drive shaft is rotatably mounted in the head fixing seat and the head base, and the front end of the drive shaft is connected to the tail end of the auger.

[0010] Preferably, the tail of the auger is integrally provided with a rectangular part, and the front end of the drive shaft is provided with a rectangular groove; the rectangular part is inserted into the rectangular groove to realize the non-keyless connection and transmission between the auger and the drive shaft, which has a simple structure, a firm connection, and is easy to disassemble and assemble.

[0011] Preferably, the tail end of the drive shaft extends out of the headstock and is fixedly fitted with a pulley for connecting to the motor to achieve power input.

[0012] Preferably, an oil seal is provided at the connection between the tail of the auger and the front end of the drive shaft to prevent materials or liquids inside the machine body from seeping into the machine head seat, thereby improving sealing performance and equipment service life.

[0013] Preferably, a first bearing and a second bearing are sleeved on the drive shaft. The first bearing is located inside the headstock, near the tail outlet end. The second bearing is located at the connection between the headstock fixing seat and the headstock, and is used to support the drive shaft to ensure its stable rotation.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] (1) This device achieves a lubrication-free design inside the machine head by removing the bearing structure from inside the machine head, completely solving the technical problem of food contamination caused by grease leakage from the bearings inside the machine head in traditional meat grinders. The detachable machine head no longer contains moving parts that require grease lubrication. Positioning and support are achieved only by the rotation of the square shaft inside the machine head, avoiding direct contact between grease and meat, greatly improving the hygiene and safety of the food processing process, fully complying with modern food hygiene standards, and is particularly suitable for commercial and industrial environments with high cleanliness requirements.

[0016] (2) The central shaft of the auger adopts a tapered variable diameter structure that gradually increases from the tail to the head. This innovative design significantly optimizes the material conveying and compression process. During the auger's rotation and propulsion, as the shaft diameter increases, the volume of the spiral groove gradually decreases, forming a progressive compression effect. This causes the meat to be subjected to continuously enhanced extrusion pressure as it is conveyed forward, effectively preventing material backflow and improving the output density and uniformity. Compared with traditional constant-diameter augers, this structure not only improves the meat grinding efficiency but also improves the texture of the minced meat, reduces air mixing, and makes the finished product more compact and delicate. At the same time, it reduces the motor load and improves energy utilization efficiency.

[0017] (3) The entire machine head device adopts a modular design. The machine head and the front end of the machine body can be detachably connected, which facilitates quick disassembly for cleaning or replacement of orifice plates with different diameters and reamers with different blade types, meeting various processing needs such as coarse reaming and fine reaming, and improving the multifunctionality and flexibility of the equipment. Key components such as the machine head, machine body, and auger can be made of stainless steel, which has excellent corrosion resistance, wear resistance and high strength, and is suitable for frequent cleaning and high humidity and high oil kitchen environments. It is not easy to rust or deform after long-term use, ensuring the durable performance and clean appearance of the equipment. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the device;

[0019] Figure 2 This is a schematic diagram of the exploded structure of the device;

[0020] Figure 3 This is a cross-sectional structural diagram of the device;

[0021] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0022] 1—Machine head, 2—Orifice plate, 3—Reamer, 4—Auger, 40—Rectangular section, 41—Square shaft, 5—Machine body, 51—Feeding port, 6—Machine head mounting base, 7—Drive shaft, 70—Rectangular groove, 71—First bearing, 72—Second bearing, 8—Machine head base, 9—Pulley, 10—Oil seal. Detailed Implementation

[0023] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but should not be used to limit the scope of this utility model.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example:

[0026] like Figures 1-3 As shown, a head assembly for a meat grinder addresses the problems of lubrication contamination, uneven material output, and maintenance difficulties in existing technologies. Through structural optimization and innovative design, it achieves higher hygiene, transmission stability, and processing efficiency. The specific implementation of this solution is described in detail below with reference to the accompanying drawings and technical features.

[0027] In existing technologies, traditional meat grinders typically have bearings inside the head to support the square shaft at the front of the auger. While this allows for rotational positioning, the bearings require lubrication. After prolonged operation, high temperatures or seal aging can cause grease to seep out, directly contaminating the processed meat and posing a serious food safety hazard. Furthermore, this structure is difficult to clean, and residual meat scraps can easily breed bacteria, failing to meet food hygiene standards. To address this issue, this solution completely removes the bearing structure from the head. A detachable head 1 is directly fitted onto the front of the machine body 5. The square shaft 41 at the front of the auger 4 passes through the perforated plate 2 and extends into the head 1 for rotational support. However, there are no bearings inside the head; guidance and positioning are achieved solely through structural cooperation. This design completely avoids contact between lubricating grease and food, improving the purity and safety of food processing, making it particularly suitable for commercial kitchens and food production enterprises with strict hygiene requirements. Simultaneously, the head 1 can be easily disassembled, facilitating thorough cleaning or replacement of the perforated plate 2, auger blade 3, and the front of the auger, significantly improving maintenance convenience.

[0028] In terms of material conveying, traditional augers often use a design with a central shaft of uniform diameter, resulting in uneven compression force between the front and rear sections during material transport. This can easily lead to problems such as insufficient pressure at the front end, material backflow, or loose discharge. To address this deficiency, the auger 4 in this design is specifically designed as a conical structure with a central shaft diameter that gradually increases from the tail to the head. As the auger rotates, the space between the spiral blades and the inner wall of the machine gradually decreases with the increase in shaft diameter, creating a progressive compression effect. This structure ensures that the material experiences continuously increasing extrusion force as it is propelled from the rear end towards the perforated plate, effectively compacting the meat, reducing air ingress, and improving discharge density and uniformity. Compared to traditional structures, this design not only improves meat grinding efficiency but also enhances the texture of the minced meat, making it firmer and finer, while simultaneously reducing motor load and improving energy efficiency.

[0029] In terms of power transmission, existing technologies often use keyed or threaded connections between the auger and the drive shaft, which leads to problems such as complex assembly, easy loosening, and unstable transmission. This solution adopts a split connection structure: the tail of the auger 4 has an integrally formed rectangular section 40, and the front end of the drive shaft 7 has a matching rectangular groove 70. The two are connected via a plug-in method to achieve a keyless transmission connection. This structure relies on the surface contact of the rectangular cross-section to transmit torque, resulting in a large force-bearing area and strong torsional resistance, avoiding the risk of keyway wear or thread stripping, and ensuring smooth and reliable transmission. Furthermore, this connection method requires no additional fasteners, allowing for quick assembly and disassembly, and facilitating regular maintenance and cleaning by the user. The drive shaft 7 is rotatably mounted in the connection structure between the headstock fixing seat 6 and the headstock base 8, and is supported at two points via a first bearing 71 and a second bearing 72. The first bearing 71 is located inside the headstock base 8 near the tail outlet end, and the second bearing 72 is located at the connection between the headstock fixing seat 6 and the headstock base 8, forming stable support at both ends. This effectively distributes the radial load on the drive shaft during operation, reduces vibration and sway, and ensures rotational accuracy and long-term operational stability.

[0030] To prevent meat scraps, juices, or cleaning water from seeping into the transmission side of the machine body and affecting the service life of the bearings and drive shaft, this solution includes an oil seal 10 at the connection between the tail of the auger 4 and the drive shaft 7. The oil seal 10 is installed inside the machine head mounting base 6, tightly covering the outer circumference of the drive shaft, forming a reliable dynamic sealing barrier. This effectively isolates the wet and dry areas, protects the internal bearings from contamination and corrosion, extends the service life of the equipment, and reduces maintenance frequency.

[0031] Furthermore, the tail end of the drive shaft 7 extends out of the headstock 8 and is fixedly fitted with a pulley 9 for connecting an external motor. The motor transmits power to the pulley 9 via a belt, driving the drive shaft 7 to rotate, which in turn drives the auger 4 to rotate through the insertion structure of the rectangular part 40 and the rectangular groove 70. The entire power transmission path is clear, efficient, and compact, making it suitable for universal installation platforms for both tabletop and cabinet-type meat grinders.

[0032] The working process of this device is as follows: After the motor is started, power is transmitted to pulley 9 via belt, driving the drive shaft 7 to rotate; the rectangular groove 70 at the front end of the drive shaft 7 engages with the rectangular part 40 at the tail of the auger 4, transmitting torque to the auger 4; the auger 4 rotates inside the machine body 5, propelling the meat fed from the feeding port 51 forward axially; as the diameter of the auger shaft gradually increases, the material is progressively compressed during the propulsion process, and after being compacted, it is pushed to the front end; the meat is extruded through the perforated plate 2 embedded in the front end of the machine body, and simultaneously cut by the rotating cutter 3 sleeved on the square shaft 41, completing the mincing process; the processed minced meat is discharged from the front end of the machine head 1. Throughout the process, there are no bearings or lubricants inside the machine head, ensuring food hygiene and safety; the double bearing support and oil seal structure ensure stable operation of the transmission system; the detachable machine head design facilitates cleaning and function switching. This device has a reasonable structure, runs smoothly, is easy to maintain, and is suitable for various specifications of meat grinding equipment, possessing good practicality and promotional value.

[0033] The embodiments of this utility model are given for illustrative and descriptive purposes only, and are not intended to be exhaustive or to limit the utility model to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical applications of this utility model, and to enable those skilled in the art to understand this utility model and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A head assembly for a meat grinder, characterized in that, include: The machine body (5) is a hollow cylindrical structure, and a feeding port (51) is provided on the upper side of the machine body (5); a perforated plate (2) is embedded in the front end of the machine body (5), and a machine head (1) is detachably sleeved at the front end of the machine body (5); a machine head fixing seat (6) is provided at the rear end of the machine body (5), and a machine head seat (8) is connected to the rear end of the machine head fixing seat (6). The auger (4) is rotatably installed in the machine body (5). The front end of the auger (4) is fitted with a reamer (3) through a square shaft (41). The other end of the square shaft (41) is rotatably inserted into the machine head (1). The diameter of the central shaft of the auger (4) gradually increases from the tail to the head. The drive shaft (7) is rotatably mounted in the head fixing seat (6) and the head seat (8), and the front end of the drive shaft (7) is connected to the tail end of the auger (4).

2. The head assembly for a meat grinder as described in claim 1, characterized in that, The tail of the auger (4) is integrally provided with a rectangular part (40), and the front end of the drive shaft (7) is provided with a rectangular groove (70); the rectangular part (40) is inserted into the rectangular groove (70).

3. The head assembly for a meat grinder as described in claim 1, characterized in that, The tail of the drive shaft (7) extends out of the headstock (8) and is fixedly fitted with a pulley (9).

4. The head assembly for a meat grinder as described in claim 1, characterized in that, An oil seal (10) is also provided at the connection between the tail of the auger (4) and the front end of the drive shaft (7).

5. The head assembly for a meat grinder as described in claim 1, characterized in that, The drive shaft (7) is fitted with a first bearing (71) and a second bearing (72). The first bearing (71) is located inside the head seat (8) near the tail outlet end. The second bearing (72) is located at the connection between the head fixing seat (6) and the head seat (8).

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