Full-automatic food stirring equipment and food processing technology

Abstract

The invention relates to full-automatic food stirring equipment and a food processing technology, and belongs to the technical field of food processing.The full-automatic food stirring equipment comprises an equipment body, a supporting part, a stirring barrel and a forward and backward stirring device, and the forward and backward stirring device is composed of a belt pulley part, a bevel gear part, a stirring part and a connecting rod rack part; the driving source outputs a constant rotating speed through the belt pulley part, drives a connecting rod of the connecting rod rack part to do circular motion, converts the circular motion into linear reciprocating motion of a rack, and drives the bevel gear part to alternately rotate forwards and backwards when the rack moves leftwards or rightwards, so as to drive the stirring part to perform forward and backward rotation stirring action in the stirring barrel; according to the transmission mode, the direction of the motor does not need to be frequently switched, impact current and reverse torque interference during starting, stopping and reversing of the motor are avoided, meanwhile, the stirring action is naturally matched with the material resistance change due to the phase synchronization characteristic of the forward and reverse stirring structure, and the influence of load fluctuation on the system stability is reduced.

Description

Technical Field

[0001] This invention belongs to the field of food processing technology, specifically relating to a fully automatic food mixing equipment and food processing technology. Background Technology

[0002] In the mixing and stirring processes of the food industry, for viscous materials such as high-moisture dough, minced meat, and fillings, a single rotary stirring method often fails to achieve ideal mixing uniformity. The materials move along a fixed flow path within the mixing drum, causing the area near the stirring paddle to experience excessive temperature rise due to excessive shear force or excessive stretching of the gluten network. Meanwhile, the area between the drum wall and the paddle blades is prone to forming mixing dead zones, resulting in uneven distribution of moisture and auxiliary materials. To solve this problem, existing technologies have widely introduced a process of alternating forward and reverse stirring. By periodically changing the stirring direction, the fixed flow field is broken, simulating the folding action of hand kneading, thereby improving the three-dimensionality and gentleness of the mixing.

[0003] Currently, the solutions for achieving the aforementioned forward and reverse rotation functions mainly rely on programmable servo control of the drive motor. Specifically, this solution uses a complex electronic control system to periodically instruct the motor to perform forward rotation, stop, and reverse rotation cycles. However, when mixing viscous materials such as high-moisture dough, the gluten protein network undergoes phased formation and local breakage, and the material distribution exhibits microscopic unevenness, resulting in a non-constant mixing load that frequently generates irregular passive fluctuations during mixing. Faced with this inherent load disturbance, the forward and reverse rotation solution based on direct electronic control reveals its inherent limitations. The frequent start-stop and instantaneous reversal of the motor itself generates continuous inrush current and reverse electromagnetic torque, while the dynamic fluctuations in load resistance further interfere with the stability of the electronic control system, making it difficult to accurately maintain the preset speed at the resistance peak, or to become inaccurate at the reverse switching point due to inertial overshoot or response delay, ultimately damaging the texture uniformity and process stability of the food. To address this, a fully automatic food mixing equipment and food processing technology are proposed. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides a fully automatic food mixing equipment and food processing technology, which solves the problem that existing food mixing equipment uses an electrically controlled forward and reverse rotation system, which causes unstable motor control due to load fluctuations when mixing viscous materials, resulting in uneven mixing and process fluctuations.

[0005] The objective of this invention can be achieved through the following technical solutions: A fully automatic food mixing device includes a main body, a support unit and a mixing tank mounted on the main body, and a forward and reverse mixing device for mixing materials in the mixing tank. Both the mixing tank and the forward and reverse mixing device are mounted on the support unit. The forward and reverse mixing device includes a pulley unit, a bevel gear unit, a mixing unit, and a connecting rod and rack unit. The mixing unit is located at one end of the bevel gear unit, and the rack of the connecting rod and rack unit meshes with the other end of the bevel gear unit. The pulley unit is connected to a connecting rod of the connecting rod and rack unit. The pulley unit is externally connected to a drive source, which drives the connecting rod of the connecting rod and rack unit to rotate. The connecting rod of the connecting rod guide unit drives the rack to move, and the rack drives the bevel gear unit to rotate forward and reverse. The bevel gear unit drives the mixing unit to rotate forward and reverse within the mixing tank.

[0006] As a further embodiment of the present invention, the bevel gear section includes four bevel gears, and the four bevel gears mesh with each other in a rectangular distribution.

[0007] As a further embodiment of the present invention, the stirring unit includes a first stirring group and a second stirring group, the second stirring group being located around the first stirring group, the first stirring group being sleeved on the shaft of a bevel gear near the bottom of the stirring tank, and the second stirring group being sleeved on the shaft of a bevel gear near the top of the stirring tank.

[0008] As a further embodiment of the present invention, the first stirring group and the second stirring group each include three uniformly distributed first stirring blocks and second stirring blocks.

[0009] As a further aspect of the present invention, the included angle between the first stirring block and the adjacent second stirring block is 60°.

[0010] As a further embodiment of the present invention, the first stirring group and the second stirring group are both sleeved on the shaft of the bevel gear by a limiting rod, and the three first stirring blocks and the three second stirring blocks are respectively connected to the limiting rod by a first telescopic member and a second telescopic member.

[0011] As a further embodiment of the present invention, the connecting rod rack portion further includes a guide frame rotatably mounted on the support portion, one end of the connecting rod of the connecting rod rack portion is hinged to the shaft center of one of the pulleys of the pulley portion, the other end of the connecting rod of the connecting rod rack portion is hinged to one end of the rack, and the rack slides through the guide frame.

[0012] A fully automated food processing technology includes the following steps: S1: Initial mixing. The first and second mixing groups are initially located at the same horizontal level in the middle of the mixing tank. After the material is added, the drive source is started, and the two groups synchronously rotate forward and reverse to perform preliminary mixing throughout the entire area. S2: Asynchronous preheating, the first stirring group is driven to move downward by the first telescopic component to detect the state of the material at the bottom of the stirring tank, and the second stirring group maintains the middle height and stirs in both directions to initially adapt to the material characteristics; S3: Asynchronous strengthening, the first mixing group moves to the bottom to perform strong shearing and compaction mixing on the bottom material, and the second mixing group is driven to the top by the second telescopic component to loosen and mix the upper surface material, so as to achieve targeted treatment in different areas; S4: Cross-fusion, the first mixing group rises from the bottom and the second mixing group falls from the top to the middle height. When they meet, they stir in both directions simultaneously, so that the materials in the upper and lower layers can fully collide and fuse. S5: Staggered homogenization, the first stirring group moves down a small distance to stir the lower layer, and the second stirring group moves up a small distance to stir the upper layer. The two maintain a vertical staggered height difference, and the forward and reverse rotation forms a shear gradient field to achieve fine homogenization. S6: Drive the first and second mixing groups to return to the initial intermediate height synchronously, and synchronously reverse the mixing for a predetermined time to make the material stable and uniform before stopping the machine to discharge the material.

[0013] As a further aspect of the present invention, both the first stirring group and the second stirring group are equipped with sensors for detecting the state of the material.

[0014] As a further embodiment of the present invention, the asynchronous lifting motion of the first stirring group and the second stirring group is controlled by a split camshaft mechanism. The split camshaft mechanism is driven by a drive source through a fixed ratio transmission. The split camshaft mechanism is provided with two independent cam profiles with different phases, which respectively control the lifting timing and stroke of the first stirring group and the second stirring group.

[0015] The beneficial effects of this invention are as follows: This invention designs a forward and reverse stirring device that automatically converts the constant rotation of the drive source into the forward and reverse motion of the stirring unit. The fully automatic food stirring equipment includes a main body, a support unit, a stirring tank, and the forward and reverse stirring device. The forward and reverse stirring device consists of a pulley unit, a bevel gear unit, a stirring unit, and a connecting rod and rack unit. The drive source outputs a constant speed through the pulley unit, driving the connecting rod of the connecting rod and rack unit to perform circular motion. The end of the connecting rod is hinged to the rack, converting the circular motion into the linear reciprocating motion of the rack. The rack meshes with the bevel gear unit; when the rack moves left or right, it drives the bevel gear unit to alternately rotate forward and reverse, thereby causing the stirring unit to perform forward and reverse stirring actions within the stirring tank. This transmission method eliminates the need for frequent motor direction switching by the electronic control system, avoiding inrush current and reverse torque interference during motor start-up, shutdown, and commutation. Simultaneously, the phase synchronization characteristic of the forward and reverse stirring structure allows the stirring action to naturally match changes in material resistance, reducing the impact of load fluctuations on system stability. This improves speed stability and steering accuracy, ensuring material mixing uniformity and process stability. It solves the problem of unstable motor control caused by load fluctuations when stirring viscous materials in existing food mixing equipment using electronically controlled forward and reverse rotation systems, resulting in uneven mixing and process fluctuations. Furthermore, the rigid transmission of the rack and pinion effectively absorbs impact loads, reducing energy loss during motor commutation. Attached Figure Description

[0016] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the planar structure of the forward and reverse stirring device of the present invention; Figure 3 This is an isometric view of the forward and reverse stirring device of the present invention; Figure 4 This is a schematic diagram of the stirring section structure of the present invention; Figure 5 This is a flowchart of the food processing technology of the present invention.

[0018] Explanation of key component symbols: In the diagram: 1. Main body of the equipment; 2. Support unit; 3. Mixing tank; 4. Forward and reverse mixing device; 41. Belt pulley unit; 42. Bevel gear unit; 43. Mixing unit; 431. First mixing group; 432. Second mixing group; 433. Limiting rod; 434. First telescopic component; 435. Second telescopic component; 44. Connecting rod rack unit; 441. Guide frame. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0020] Please see Figure 1 - Figure 5 As shown, this embodiment provides a fully automatic food mixing device, including a main body 1, a support part 2 and a mixing tank 3 disposed on the main body 1, and a forward and reverse mixing device 4 for mixing materials in the mixing tank 3. The mixing tank 3 and the forward and reverse mixing device 4 are both disposed on the support part 2. The forward and reverse mixing device 4 includes a pulley part 41, a bevel gear part 42, a mixing part 43 and a connecting rod rack part 44. The mixing part 43 is disposed at one end of the bevel gear part 42. The rack of the connecting rod rack part 44 meshes with the other end of the bevel gear part 42. The pulley part 41 is connected to the connecting rod of the connecting rod rack part 44. The pulley part 41 is externally connected to a drive source. The pulley part 41 drives the connecting rod of the connecting rod rack part 44 to rotate. The connecting rod of the connecting rod guide part drives the rack to move. The rack drives the bevel gear part 42 to rotate forward and reverse. The bevel gear part 42 drives the mixing part 43 to rotate forward and reverse in the mixing tank 3.

[0021] In the existing mixing and stirring processes of the food industry, the stirring of viscous materials often adopts an alternating forward and reverse rotation process to improve the mixing uniformity. The traditional solution relies on servo motor drive, and the direction is switched periodically through the electronic control system. However, materials such as high water content dough will generate dynamic load fluctuations during the stirring process, which will cause inrush current and reverse torque interference when the motor starts and stops frequently, affecting the speed stability and the accuracy of the direction switching, resulting in uneven material texture and process fluctuations.

[0022] To address the aforementioned problems, this application proposes a mixing device comprising a main body 1, a support 2, a mixing tank 3, and a forward and reverse mixing device 4. The forward and reverse mixing device 4 includes a pulley section 41, a bevel gear section 42, a mixing section 43, and a connecting rod rack section 44. The mixing section 43 is mounted at the end of the bevel gear section 42. The rack of the connecting rod rack section 44 meshes with the other end of the bevel gear section 42. The pulley section 41 is connected to the connecting rod and driven by a drive source. The pulley section 41 drives the connecting rod to rotate, and the connecting rod drives the rack to reciprocate. The rack, through meshing, causes the bevel gear section 42 to alternately rotate forward and reverse, ultimately driving the mixing section 43 to perform forward and reverse mixing actions within the mixing tank 3. The pulley section 41 includes two pulleys, one large and one small, connected by a belt. The smaller pulley is externally connected to a drive source, which is a motor. The larger pulley is connected to the connecting rod rack section 44. The connecting rod of the rack and pinion section 44 is connected to the pulley section 41, which converts the constant speed of the drive source into the rotational motion of the connecting rod. Specifically, the drive source outputs a constant speed through the pulley section 41, which drives the connecting rod of the rack and pinion section 44 to make circular motion. The end of the connecting rod is hinged to the rack, converting the circular motion into the linear reciprocating motion of the rack. The rack meshes with the bevel gear section 42. When the rack moves to the left, it drives the bevel gear to rotate clockwise, and when it moves to the right, it rotates counterclockwise. The left and right directions are for ease of understanding and to distinguish between two opposite directions, not in the actual sense of left and right. The reversing action of the bevel gear is directly transmitted to the stirring section 43, which makes it alternately stir in the stirring tank 3. Since the reciprocating frequency of the rack is in a fixed proportion to the speed of the drive source, the reversing cycle of the stirring action can be precisely controlled by adjusting the speed ratio of the pulley.

[0023] To avoid torque imbalance and reversing impact during transmission, in one embodiment, the bevel gear section 42 includes four bevel gears meshing in a rectangular arrangement. This rectangular arrangement means that the axes of the four bevel gears project onto a plane to form a rectangular geometric relationship. Specifically, this can be achieved using two pairs of mutually perpendicular meshing bevel gear sets. The included angle between the axes of each pair of bevel gears can be 90°. The four bevel gears form a closed-loop transmission structure through pairwise meshing. When the rack drives one bevel gear to rotate, power is transmitted to the adjacent bevel gears through the meshing relationship, creating a mutually restrictive linkage. When the pulley drives the connecting rod... When the rack moves in a reciprocating linear motion, the rack pushes one of the bevel gears to rotate clockwise. This bevel gear, through meshing, drives the adjacent bevel gear to rotate counterclockwise, which in turn drives the third bevel gear to rotate clockwise, and finally causes the fourth bevel gear to rotate counterclockwise, forming a transmission pattern in which the four bevel gears alternately rotate clockwise and counterclockwise. This rectangular meshing structure ensures that the power transmission path is symmetrically distributed, avoiding excessive torque on one side of the gear. During the frequent reversing of the stirring device, the symmetrical meshing relationship of the four bevel gears can balance the force state of each gear, thereby extending the service life of the gear set, while reducing vibration and noise caused by gear uneven loading, and improving the smoothness of the stirring action.

[0024] To avoid a uniform mixing flow field and the existence of mixing dead zones within the tank, in one embodiment, the stirring unit 43 includes a first stirring group 431 and a second stirring group 432. The second stirring group 432 is located around the first stirring group 431. The first stirring group 431 is mounted on the shaft of a bevel gear near the bottom of the mixing tank 3, and the second stirring group 432 is mounted on the shaft of a bevel gear near the top of the mixing tank 3. The first stirring group 431 and the second stirring group 432 each include three evenly distributed first stirring blocks and second stirring blocks, as shown below. Figure 4 As shown, the first and second stirring blocks are located in the inner and outer layers respectively, and their movements do not interfere with each other. The first and second stirring blocks are located on the same horizontal plane, and their rotation directions are opposite. The first stirring group 431 in the inner layer generates a strong, centripetal shear flow in the central region, while the second stirring group 432 in the outer layer generates a strong, centrifugal shear flow in the peripheral region. These two flow fields with opposite directions meet, collide, and shear on the same horizontal plane, greatly disrupting the overall rotational trend of the material and forcing the material to undergo intense exchange and folding in the radial and circumferential directions, thus achieving true three-dimensional mixing. In addition, the second stirring group 432 is specifically responsible for sweeping and stirring the material near the barrel wall to prevent material adhesion and eliminate the peripheral dead zone, while the first stirring group 431 is specifically responsible for stirring the material in the central region. The two work together on the same plane, which means that the entire horizontal section from the barrel center to the barrel wall is simultaneously under active stirring without any omissions, thereby improving the mixing efficiency.

[0025] It is worth mentioning that if the inner and outer mixing blocks are perfectly aligned on the circumference, i.e., the included angle is 0°, they will move synchronously like a large paddle, pushing the material to rotate as a whole, forming a dead zone for mixing, resulting in low efficiency. To avoid this problem and improve mixing efficiency, in one embodiment, the included angle between the first mixing block and the adjacent second mixing block is 60°. This 60° offset angle means that at any time, the inner and outer mixing blocks are in staggered positions. Specifically, the first mixing group 431 and the second mixing group 432 are sleeved on the shaft of the bevel gear by the limiting rod 433. The three first mixing blocks and the three second mixing blocks are fixed at different height positions of the limiting rod 433 at uniform intervals. When the bevel gear drives the mixing group to rotate forward and backward, the circumferential offset angle of the first mixing block and the second mixing block forms a complementary material flow path. When the first mixing block rotates forward, it pushes the material to move in a clockwise direction, and when the second mixing block rotates backward, it drives the material to move in a counterclockwise direction. The two groups of mixing blocks alternately cover different areas in the mixing tank 3 through a 60° phase difference, thereby eliminating the mixing dead zone.

[0026] To avoid the problem of a fixed mixing group height that cannot adapt to the differences in material states at different levels during mixing, in one embodiment, the first mixing group 431 and the second mixing group 432 are both fixedly sleeved on the shaft of the bevel gear by a limiting rod 433. The three first mixing blocks and the three second mixing blocks are respectively connected to the limiting rod 433 by a first telescopic member 434 and a second telescopic member 435. Through the first telescopic member 434 and the second telescopic member 435, the first mixing group 431 and the second mixing group 432 can be driven independently to move in the vertical direction, thereby realizing targeted treatment of specific areas in the mixing tank 3, such as the bottom or the surface layer, and greatly enhancing the equipment's adaptability to different process stages and material characteristics. The first telescopic member 434 and the second telescopic member 435 refer to power actuators that can output linear displacement, specifically hydraulic cylinders or electric push rods. The cylinder body is fixedly connected to the limiting rod 433, and the end of the piston rod is connected to the mixing block. The position of the mixing block is adjusted by telescoping along the vertical direction.

[0027] To better avoid problems such as swaying, jamming, or misalignment with the bevel gear during long-distance reciprocating motion of the rack, in one embodiment, the connecting rod rack section 44 further includes a guide frame 441 rotatably mounted on the support section 2. One end of the connecting rod of the connecting rod rack section 44 is hinged to the axis of one of the pulleys of the pulley section 41, and the other end of the connecting rod of the connecting rod rack section 44 is hinged to one end of the rack. The rack slides through the guide frame 441. The guide frame 441 is a rigid frame structure used to constrain the movement trajectory of the rack. Specifically, the pulley section 41 rotates under the drive of the drive source. When rotating, the connecting rod hinged to the pulley shaft generates planar circular motion. This circular motion is transmitted to the rack through the other end of the connecting rod. Since the rack is restricted by the guide frame 441 to slide only along the straight groove, the circular motion trajectory of the connecting rod is converted into the linear reciprocating motion of the rack. The reciprocating motion of the rack drives the bevel gear part 42 to rotate periodically in the forward and reverse directions through meshing, thereby driving the stirring part 43 to perform bidirectional stirring action. The rigid support of the guide frame 441 can eliminate the lateral displacement of the rack due to inertia at the moment of reversal, ensuring that the meshing surface of the bevel gear is always in an effective contact state.

[0028] A fully automated food processing technology includes the following steps: S1: In the initial stage of full-area initialization, the first stirring group 431 and the second stirring group 432 are initially located at the middle height position of the mixing tank 3 and are on the same horizontal plane. The material to be stirred is put into the mixing tank 3, the drive source is started, and the pulley part 41 is driven to rotate continuously in one direction. Then, through the connecting rod rack part 44 and the bevel gear part 42, the first stirring group 431 and the second stirring group 432 are driven to rotate synchronously in both directions at the middle height position of the mixing tank 3 to perform preliminary mixing in the whole area. S2: Entering the asynchronous preheating stage, the first stirring group 431 keeps rotating in both directions and is driven by the first telescopic component 434 to start moving downward to detect the state of the bottom material. The second stirring group 432 remains in the same position and continues to stir in both directions at the middle height, so that the equipment can initially adapt to the material characteristics. S3: Asynchronous strengthening stage of bottom and middle layers. The first stirring group 431 moves to the bottom of the stirring tank 3 and performs strong shearing and compaction mixing on the bottom layer material. The second stirring group 432 moves upward from the middle position and loosens and mixes the upper surface material after reaching the upper area. The two stirring components are located at the two ends of the tank respectively, and perform asynchronous and targeted strengthening treatment on different areas. S4: Cross-transition and fusion stage. The first stirring group 431 rises from the bottom to the middle position, and the second stirring group 432 falls from the top to the middle position. When the two meet at the middle position, they do not stop immediately, but instead carry out synchronous forward and reverse stirring in this area for a period of time, so as to fully collide and fuse the upper and lower layer materials that have been strengthened respectively. S5: Displacement and fine homogenization stage. The first stirring group 431 and the second stirring group 432 end the synchronization and enter the asynchronous mode again. The first stirring group 431 moves down a short distance again to stir the middle and lower layers, and the second stirring group 432 moves up a short distance again to stir the middle and upper layers. The two maintain a fixed displacement height difference in the vertical direction and continue to rotate forward and reverse, thereby forming a continuously changing shear gradient field in the central area of ​​the tank to achieve fine homogenization. S6: Reset and final stabilization stage. The first mixing group 431 and the second mixing group 432 are synchronously returned to the initial intermediate height position for final synchronous forward and reverse mixing. The operation lasts for a predetermined time to make the material properties completely stable and uniform, and then the machine is stopped and the material is discharged.

[0029] Both the first stirring group 431 and the second stirring group 432 are equipped with sensors for detecting the state of the material. The asynchronous lifting and lowering movements of the first stirring group 431 and the second stirring group 432 are controlled by a split camshaft mechanism. The split camshaft mechanism is driven by a drive source through a fixed ratio transmission. The split camshaft mechanism is equipped with two sets of independent cam profiles with different phases, which control the lifting and lowering timing and stroke of the first stirring group 431 and the second stirring group 432 respectively. Initial mixing refers to the stirring groups synchronously stirring in both forward and reverse directions at the initial position. Specifically, this can be achieved by using a belt pulley to drive a connecting rod rack to drive a bevel gear to rotate in both directions. The material is broken up through symmetrical stirring action. The material has a fixed flow field. Asynchronous preheating refers to the first stirring group 431 probing the material state, which can be achieved by using a pressure sensor to feed back the viscosity data of the bottom material. The stirring depth is dynamically adjusted to match the material characteristics. Asynchronous enhancement refers to upper and lower layered stirring, which can be achieved by using a split camshaft to control the independent movement of two sets of telescopic parts. Layered processing eliminates mixing dead zones. Cross-fusion refers to the stirring groups mixing at the same time, which promotes the exchange between material layers. Staggered homogenization refers to the stirring groups forming a gradient field by staggering the stirring groups. This can be achieved by using a phase difference cam to control the staggered movement of two sets of stirrers, which eliminates local agglomeration through shear gradient.

[0030] Specifically, after the materials are added, the first mixing group 431 and the second mixing group 432 synchronously rotate forward and reverse at the middle height. The bevel gear transmission system drives the mixing blocks to rotate in both directions to form a symmetrical vortex, achieving full-area mixing. After the materials are initially mixed, the first mixing group 431 descends to the bottom layer through the first telescopic member 434. The viscosity of the materials is sensed by the pressure change generated by the gap between the first mixing block and the bottom of the barrel. At the same time, the second mixing group 432 maintains the middle layer mixing to form a dynamic balance. After the bottom material is subjected to strong shearing, the second mixing group 432 moves the loose surface material upward through the second telescopic member 435. The camshaft controls the independent movement trajectory of the two mixing groups to achieve upper and lower layer processing. Subsequently, the two mixing groups move from the bottom and top to the middle respectively. When they meet, they synchronously stir in both directions to form a counterflow field, promoting the exchange of materials between the upper and lower layers. During the staggered stage, the two mixing groups maintain a vertical distance. The speed difference generated by the forward and reverse rotation forms a gradient shear, eliminating local agglomeration. Finally, the mixing groups return to the initial position to complete the homogenization process.

[0031] It needs to be further clarified that the first and second mixing groups must be at the same horizontal height, and the mixing blocks between them must maintain a fixed 60° offset angle. This structural feature is the key to effectively solving the problems described in the background art. If the first and second mixing groups are not at the same height, it is impossible to form a double-layered synergistic mixing flow field on the same horizontal cross-section of the mixing tank, making it difficult to achieve full-section coverage mixing from the tank center to the tank wall, and easily leaving mixing dead zones. In addition, if the included angle between the two is not 60°, especially when they are completely aligned, the inner and outer mixing blocks will move approximately synchronously, pushing the material to rotate as a whole rather than forming staggered shearing. If the fixed flow field cannot be disrupted, it will instead exacerbate the movement of materials along the fixed path, leading to local overheating or uneven mixing. Therefore, not all bidirectional stirring structures can solve the problems of load fluctuation and dead zone in the mixing of viscous materials. By limiting the structural combination of "same height" and "60° offset angle", the inner first stirring group and the outer second stirring group form complementary and staggered flow paths during forward and reverse rotation, effectively breaking the overall rotation trend of the material and realizing three-dimensional shearing and folding. Thus, on the basis of mechanical transmission forward and reverse rotation, the mixing uniformity and process stability are further improved. This specific structural design is what makes this invention different from general bidirectional stirring structures.

[0032] Working principle and usage process of this invention: In use, the drive source is connected to an external control system. The control system controls the drive source to start. The drive source drives the connecting rod to make a circular motion through the pulley part 41. The connecting rod then drives the rack to make a linear reciprocating motion relative to the guide frame 441. The rack meshes with the bevel gear part 42. Its reciprocating motion drives the bevel gear set to alternately rotate forward and reverse. Finally, this reversing motion is transmitted to the stirring part 43, so that it performs periodic forward and reverse stirring in the stirring tank 3. This transmission design does not require the electrical control system to frequently switch the motor direction. It not only avoids current impact and torque interference, but its inherent phase synchronization characteristics also allow the stirring action to naturally adapt to the changes in material resistance, thereby maintaining a stable stirring rhythm and effect when the load fluctuates. After the equipment is started, it first performs initial global mixing to initially fuse the materials. Then it enters an asynchronous stage where two sets of mixing groups move in a staggered vertical direction to perform targeted shearing and loosening of the bottom and surface materials respectively. Next, cross-fusion is used to fully integrate the upper and lower layers of materials. Then, by maintaining vertical staggering, a shear gradient field is formed to achieve fine homogenization. Finally, the two sets of mixing groups return to their initial positions for synchronous and stable mixing to ensure that the materials reach a uniform texture before being discharged. The entire process is automatically controlled by a split camshaft to control the lifting and reversing sequence of the mixing groups, achieving fully automatic, efficient and uniform food processing.

[0033] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A fully automatic food mixing device, characterized in that, The device includes a main body, a support unit and a mixing tank mounted on the main body, and a forward and reverse stirring device for stirring materials in the mixing tank. Both the mixing tank and the forward and reverse stirring device are mounted on the support unit. The forward and reverse stirring device includes a pulley unit, a bevel gear unit, a stirring unit, and a connecting rod and rack unit. The stirring unit is located at one end of the bevel gear unit, and the rack of the connecting rod and rack unit meshes with the other end of the bevel gear unit. The pulley unit is connected to a connecting rod of the connecting rod and rack unit. The pulley unit is externally connected to a drive source, which drives the connecting rod of the connecting rod and rack unit to rotate. The connecting rod of the connecting rod guide unit drives the rack to move, and the rack drives the bevel gear unit to rotate forward and reverse. The bevel gear unit drives the stirring unit to rotate forward and reverse within the mixing tank.

2. The fully automatic food mixing equipment according to claim 1, characterized in that, The bevel gear section includes four bevel gears, which mesh with each other in a rectangular arrangement.

3. The fully automatic food mixing equipment according to claim 2, characterized in that, The stirring unit includes a first stirring group and a second stirring group. The second stirring group is located around the first stirring group. The first stirring group is sleeved on the shaft of a bevel gear near the bottom of the stirring tank, and the second stirring group is sleeved on the shaft of a bevel gear near the top of the stirring tank.

4. The fully automatic food mixing equipment according to claim 3, characterized in that, The first stirring group and the second stirring group each include three uniformly distributed first stirring blocks and second stirring blocks.

5. The fully automatic food mixing equipment according to claim 4, characterized in that, The angle between the first stirring block and the adjacent second stirring block is 60°.

6. The fully automatic food mixing equipment according to claim 4, characterized in that, The first and second stirring groups are both sleeved on the shaft of the bevel gear by limiting rods, and the three first stirring blocks and the three second stirring blocks are respectively connected to the limiting rods by the first telescopic member and the second telescopic member.

7. The fully automatic food mixing equipment according to claim 1, characterized in that, The connecting rod rack section also includes a guide frame rotatably mounted on the support section. One end of the connecting rod of the connecting rod rack section is hinged to the shaft center of one of the pulleys of the pulley section, and the other end of the connecting rod of the connecting rod rack section is hinged to one end of the rack. The rack slides through the guide frame.

8. A fully automated food processing technology, based on the fully automated food mixing equipment according to any one of claims 1-7, characterized in that, Includes the following steps: S1: Initial mixing. The first and second mixing groups are initially located at the same horizontal level in the middle of the mixing tank. After the material is added, the drive source is started, and the two groups synchronously rotate forward and reverse to perform preliminary mixing throughout the entire area. S2: Asynchronous preheating, the first stirring group is driven to move downward by the first telescopic component to detect the state of the material at the bottom of the stirring tank, and the second stirring group maintains the middle height and stirs in both directions to initially adapt to the material characteristics; S3: Asynchronous strengthening, the first mixing group moves to the bottom to perform strong shearing and compaction mixing on the bottom material, and the second mixing group is driven to the top by the second telescopic component to loosen and mix the upper surface material, so as to achieve targeted treatment in different areas; S4: Cross-fusion, the first mixing group rises from the bottom and the second mixing group falls from the top to the middle height. When they meet, they stir in both directions simultaneously, so that the materials in the upper and lower layers can fully collide and fuse. S5: Staggered homogenization, the first stirring group moves down a small distance to stir the lower layer, and the second stirring group moves up a small distance to stir the upper layer. The two maintain a vertical staggered height difference, and the forward and reverse rotation forms a shear gradient field to achieve fine homogenization. S6: Drive the first and second mixing groups to return to the initial intermediate height synchronously, and synchronously reverse the mixing for a predetermined time to make the material stable and uniform before stopping the machine to discharge the material.

9. The fully automated food processing technology according to claim 8, characterized in that, Both the first and second stirring groups are equipped with sensors for detecting the state of the materials.

10. The fully automated food processing technology according to claim 8, characterized in that, The asynchronous lifting motion of the first stirring group and the second stirring group is controlled by a split camshaft mechanism. The split camshaft mechanism is driven by a drive source through a fixed ratio transmission. The split camshaft mechanism is provided with two sets of independent cam profiles with different phases, which control the lifting timing and stroke of the first stirring group and the second stirring group respectively.

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