An anti-eccentric load lifting device and mixing device

Abstract

This utility model relates to mixing equipment, specifically disclosing an anti-eccentric load lifting device and mixing apparatus, comprising: a base assembly; a lifting assembly for bearing heavy and light loads to form a lifting system, including a lifting plate, a heavy-load vertical guide rod, and a light-load vertical guide rod; and a linear drive mechanism for driving the lifting assembly to reciprocate relative to the base assembly; wherein: both the heavy-load and light-load vertical guide rods are perpendicular to the lifting plate, and the axes of the heavy-load and light-load vertical guide rods form a vertical support surface A; the distance L1 from the center of gravity of the heavy load to the vertical support surface A is less than the distance L2 from the center of gravity of the light load to the vertical support surface A, so as to balance the torque on both sides of the vertical support surface A. The anti-eccentric load lifting device and mixing apparatus provided by this utility model can effectively solve the problems of lateral bending of the vertical guide rod and lifting jamming caused by severe load imbalance at both ends of the lifting plate.

Description

Technical Field

[0001] This utility model relates to mixing equipment, and more particularly to an anti-eccentric lifting device and mixing apparatus. Background Technology

[0002] See Figure 1 Existing mixing equipment includes: Base component 1; Linear drive mechanism 2 is mounted and fixed on base assembly 1; The lifting assembly 3 includes a lifting plate 301 fixed to the drive end 201 of the linear drive mechanism 2, a first vertical guide rod 302 fixed at the middle position of the lifting plate 301, and a second vertical guide rod 303 fixed at the middle position of the lifting plate 301; wherein the lower ends of both the first vertical guide rod 302 and the second vertical guide rod 303 are slidably connected to the base assembly 1. The stirring assembly 4 includes a stirring motor 401 fixed to one end of the lifting plate 301, a stirring shaft 402 rotatably mounted on the other end of the lifting plate 301 about a vertical axis, a transmission belt extending along the length of the lifting plate 301 and driving the driving end 201 of the stirring motor 401 to the upper end of the stirring shaft 402, and a stirring head 404 fixed to the lower end of the stirring shaft 402.

[0003] In the above structure, fixing the drive end 201 of the linear drive mechanism 2 to the geometric center 3011 of the lifting plate 301, and symmetrically arranging the first vertical guide rod 302 and the second vertical guide rod 303 about the geometric center 3011 of the lifting plate 301 (i.e., symmetrical on the central plane parallel to the length and width directions of the lifting plate 301) is a common and easy-to-design and manufacture practice. However, this symmetrical arrangement has an inherent drawback, which implicitly assumes that the loads on both ends of the lifting plate 301 are roughly balanced (i.e., the mass of the stirring motor 401 is roughly equal to the combined mass of the stirring shaft 402 and the stirring head 404), thus making the system center of gravity 5 of the entire lifting system (including the lifting plate 301, guide rods, motor, stirring shaft 402, and stirring head 404) close to the geometric center 3011 of the lifting plate 301. In fact: (1) When the power demand of the stirring motor 401 increases, causing its mass to significantly exceed the combined mass of the stirring shaft 402 and the stirring head 404, the precondition of balanced load on both ends of the lifting plate 301 is broken. The system center of gravity 5 of the lifting system will be significantly biased towards the side where the stirring motor 401 is located. At this time, under the action of gravity, the system center of gravity 5 of the lifting system and the vertical support surface (passing through the geometric center 3011 of the lifting plate 301) formed by the two symmetrically arranged vertical guide rods will be significantly offset in the horizontal direction.

[0004] The offset of the system's center of gravity 5 from the vertical support surface inevitably causes the lifting system to generate a continuous downward torsional moment F relative to the two vertical guide rods under the action of gravity. This torsional moment F acts on the two vertical guide rods, causing them to bear a huge lateral bending moment. This, in turn, forces the vertical guide rods to bend and deform, resulting in the lifting plate 301 moving up and down unevenly, swaying, or generating abnormal noise, or even jamming and being unable to slide.

[0005] (2) When the system center of gravity 5 deviates from the vertical support surface, but the driving end 201 of the linear drive mechanism 2 is still fixed on the geometric center 3011 of the lifting plate 301, the driving force of the linear drive mechanism 2 is separated from the vertical support surface, which will generate additional torque on the lifting plate 301. The double torque superposition (torque caused by the deviation of the system center of gravity 5 and torque caused by the deviation of the driving force) further accelerates the failure of the vertical guide rod.

[0006] Therefore, it is necessary to improve the existing high-power mixing equipment to solve the problems of vertical guide rod bending and lifting jamming caused by severe load imbalance at both ends of the lifting plate.

[0007] The information disclosed in this background section is included only to enhance the understanding of the context of this disclosure, and therefore may contain information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0008] One objective of this invention is to provide an anti-eccentric load lifting device and a mixing device that can effectively solve the problems of vertical guide rod bending and lifting jamming caused by severe load imbalance at both ends of the lifting plate.

[0009] To achieve the above objectives, on the one hand, this utility model provides an anti-eccentric load lifting device, comprising: Base assembly; A lifting assembly is provided, which is disposed opposite to the base assembly. The lifting assembly includes: a lifting plate, one end of which has a heavy-load area for hanging heavy loads and the other end has a light-load area for hanging light loads; after the heavy-load area and the light-load area are respectively hung with loads, the lifting assembly and the loads hung at both ends of the lifting plate together constitute a lifting system, and the center of gravity of the lifting system is located on the side of the geometric center of the lifting plate closer to the heavy-load area; a heavy-load vertical guide rod and a light-load vertical guide rod, the top of which is fixed to the lifting plate, and the bottom of which is slidably connected to the base assembly. A linear drive mechanism is mounted on the base assembly, and the drive end is connected to the lifting plate, for driving the lifting assembly to slide back and forth relative to the base assembly; in: Both the heavy-duty vertical guide rod and the light-duty vertical guide rod are perpendicular to the lifting plate, and the axes of the heavy-duty vertical guide rod and the light-duty vertical guide rod form a vertical support surface A; The distance L1 from the center of gravity of the heavy load to the vertical support surface A is less than the distance L2 from the center of gravity of the light load to the vertical support surface A, so as to balance the torque on both sides of the vertical support surface A.

[0010] Optionally, the light-load area may be detachably equipped with a counterweight for adjusting the position of the system's center of gravity.

[0011] Optionally, the connection point between the linear drive mechanism and the lifting plate is the drive point; The heavy-duty vertical guide rod and the light-duty vertical guide rod are arranged symmetrically about the driving point.

[0012] Optionally, the line connecting the heavy-load center of gravity and the light-load center of gravity is orthogonal or oblique to the vertical support surface A.

[0013] Optionally, the base assembly includes a base bottom plate and a base top plate fixedly disposed above the base bottom plate at intervals; The linear drive mechanism is mounted and fixed on the base plate, and the lower ends of the heavy-duty vertical guide rod and the light-duty vertical guide rod are slidably connected to the top plate of the base.

[0014] Optionally, the top plate of the base is provided with two guide rod mounting holes, and a linear bearing is fixed in the guide rod mounting holes for the corresponding heavy-duty vertical guide rod or the light-duty vertical guide rod to slide up and down through.

[0015] On the other hand, a stirring device is provided, comprising: Any of the aforementioned anti-eccentric lifting devices; The stirring assembly includes a stirring motor mounted and fixed to one end of the lifting plate, a stirring shaft rotatably mounted on the other end of the lifting plate about a vertical axis and driven by the stirring motor, and a stirring head fixed to the lower end of the stirring shaft.

[0016] Optionally, the stirring assembly further includes a transmission component that extends along the length of the lifting plate and drives the drive shaft of the stirring motor to the upper end of the stirring shaft.

[0017] Optionally, the transmission component is a transmission belt, chain, or gear assembly.

[0018] Optionally, the drive shaft of the stirring motor, the drive end of the linear drive mechanism, and the stirring shaft are all perpendicular to the lifting plate; The drive shaft of the stirring motor, the drive end of the linear drive mechanism, and the stirring shaft are coplanar on the bisecting vertical plane. The bisecting vertical plane passes through the geometric center of the lifting plate and bisects the lifting plate. The heavy-load vertical guide rod and the light-load vertical guide rod are asymmetrically arranged on both sides of the split vertical plane, and the distances from the split vertical plane to the two rods are equal.

[0019] The beneficial effects of this utility model are as follows: It provides an anti-eccentric load lifting device and a stirring device. By setting up a heavy-load zone and a light-load zone and clearly defining that the system's center of gravity is biased towards the heavy-load zone, and specifying that the distance (L1) from the heavy-load center of gravity to the vertical support surface A is less than the distance (L2) from the light-load center of gravity to the vertical support surface A, the torque generated on the heavy-load side (mass M1×L1 of the heavy load) and the torque on the light-load side (mass M2×L2 of the light load) tend to be balanced. This eliminates the torsional torque caused by the imbalance of loads on both sides of the vertical support surface A, which leads to the center of gravity of the lifting system deviating from the vertical support surface A. It fundamentally avoids the bending deformation of the vertical guide rod due to lateral bending moment, and completely solves the problems of guide rod jamming, shaking, and abnormal noise during the lifting process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an existing stirring device is provided for the background art; Figure 2 A front view schematic diagram of the stirring device provided in the embodiment; Figure 3 A top view of the stirring apparatus provided in the embodiment; Figure 4 This is a schematic diagram of the base assembly provided in an embodiment.

[0022] In the picture: 1. Base assembly; 101. Base bottom plate; 102. Base top plate; 1021. Guide rod mounting hole; 103. Shelf; 2. Linear drive mechanism; 201. Drive end; 3. Lifting assembly; 301. Lifting plate; 3011. Geometric center; 302. First vertical guide rod; 303. Second vertical guide rod; 304. Heavy-duty vertical guide rod; 305. Light-duty vertical guide rod; 4. Stirring assembly; 401. Stirring motor; 402. Stirring shaft; 403. Transmission components; 404. Stirring head; 5. System center of gravity; 6. Heavy load center of gravity; 7. Light load center of gravity; 8. Midpoint vertical plane; 9. Counterweight. Detailed Implementation

[0023] In this utility model, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment can be included in at least one embodiment of this utility model. The term "embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or connection with other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0024] Unless otherwise defined, the technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the use of related terms herein is merely for the purpose of describing particular embodiments and is not intended to limit the invention.

[0025] In the description of this utility model, the term "and / or" is used to describe the logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and A and B exist simultaneously. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" logical relationship.

[0026] In this invention, terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any actual quantity, hierarchy, or order between these entities or operations.

[0027] Without further limitations, the use of terms such as “comprising,” “including,” “having,” or other similar expressions in this invention is intended to cover non-exclusive inclusion, which does not exclude the presence of additional elements in a process, method, or product that includes the stated elements, such that a process, method, or product that includes a series of elements may include not only those defined elements but also other elements not expressly listed, or elements inherent to such a process, method, or product.

[0028] Similar to the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceeding" are understood to exclude the stated number; expressions such as "above," "below," and "within" are understood to include the stated number. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple" are also understood in this way, such as "multiple groups" and "multiple times," unless otherwise explicitly specified.

[0029] In the description of the embodiments of this utility model, the space-related expressions used, such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "vertical," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or drawings. They are only for the convenience of describing the specific embodiments of this utility model or for the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0030] Unless otherwise expressly specified or limited, the terms "installation," "connection," "linking," "fixing," and "setting," as used in the description of the embodiments of this utility model, should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction between two components. For those skilled in the art to which this utility model pertains, the specific meaning of the above terms in the embodiments of this utility model can be understood according to the specific circumstances.

[0031] This utility model provides an anti-eccentric load lifting device and a mixing device. Through a specific vertical guide rod spatial layout design, it fundamentally solves the problem of vertical guide rod bending and lifting jamming caused by severe load imbalance in existing high-power mixing devices.

[0032] Example 1

[0033] This embodiment describes the specific structure of an anti-eccentric load lifting device.

[0034] See Figure 2 and Figure 3 The anti-eccentric load lifting device provided in this embodiment includes: Base component 1; Lifting assembly 3, which is disposed opposite to the base assembly 1, includes: The lifting plate 301 has a heavy-load area at one end for mounting heavy loads and a light-load area at the other end for mounting light loads. After the heavy-load area and the light-load area are respectively mounted with loads, the lifting assembly 3 and the loads mounted at both ends of the lifting plate 301 together constitute a lifting system. The system center of gravity 5 of the lifting system is located on the side of the geometric center 3011 of the lifting plate 301 closer to the heavy-load area. Heavy-duty vertical guide rod 304 and light-duty vertical guide rod 305, the top of the heavy-duty vertical guide rod 304 and the light-duty vertical guide rod 305 are fixed to the lifting plate 301, and the bottom of the heavy-duty vertical guide rod 304 and the light-duty vertical guide rod 305 are slidably connected to the base assembly 1. A linear drive mechanism 2 is mounted on the base assembly 1 and its drive end is connected to the lifting plate 301, which is used to drive the lifting assembly 3 to slide back and forth relative to the base assembly 1. in: The heavy-duty vertical guide rod 304 and the light-duty vertical guide rod 305 are both perpendicular to the lifting plate 301, and the axes of the heavy-duty vertical guide rod 304 and the light-duty vertical guide rod 305 form a vertical support surface A. The distance L1 from the heavy load center of gravity 6 to the vertical support surface A is less than the distance L2 from the light load center of gravity 7 to the vertical support surface A, so as to balance the torque on both sides of the vertical support surface A.

[0035] The anti-eccentric load lifting device and stirring device provided in this embodiment, by setting up a heavy-load zone and a light-load zone and clearly defining that the system's center of gravity 5 is biased towards the heavy-load zone, and by specifying that the distance (L1) from the heavy-load center of gravity 6 to the vertical support surface A is less than the distance (L2) from the light-load center of gravity 7 to the vertical support surface A, makes the torque generated on the heavy-load side (mass M1×L1 of the heavy load) and the torque on the light-load side (mass M2×L2 of the light load) tend to be balanced. This eliminates the torsional torque caused by the imbalance of loads on both sides of the vertical support surface A, which leads to the center of gravity of the lifting system deviating from the vertical support surface A. It fundamentally avoids the bending deformation of the vertical guide rod under lateral bending moment, and completely solves the problems of guide rod jamming, shaking and abnormal noise during the lifting process.

[0036] See Figure 4 In this embodiment, the base assembly 1 includes a base bottom plate 101 and a base top plate 102 that is fixedly disposed above the base bottom plate 101 at intervals. The linear drive mechanism 2 is mounted and fixed on the base plate 101, and the lower ends of the heavy-duty vertical guide rod 304 and the light-duty vertical guide rod 305 are slidably connected to the top plate 102 of the base. Furthermore, the top plate 102 of the base is provided with two guide rod mounting holes 1021, and linear bearings are fixedly installed in the guide rod mounting holes 1021 for the corresponding heavy-duty vertical guide rod 304 or light-duty vertical guide rod 305 to slide through.

[0037] The double-layer base structure spatially divides the functional areas of each component. The top plate 102 of the base provides a robust sliding support platform for the heavy-duty vertical guide rod 304 and the light-duty vertical guide rod 305. Its rigid structure can effectively resist various forces transmitted by the guide rods and prevent base deformation. This layered design fixes the linear drive mechanism 2 to the bottom plate while the guide rods are slidably constrained to the upper plate, ensuring stable installation of the drive mechanism and avoiding motion interference between the drive components and the guide system.

[0038] Optionally, a counterweight 9 can be detachably installed on the light-load area at the top of the lifting plate 301 for adjusting the position of the system's center of gravity 5. By adding a detachable counterweight in the light-load area, the position of the system's center of gravity 5 can be dynamically adjusted. This structure can flexibly adapt to actual manufacturing errors or load changes. By adjusting the mass of the counterweight 9, the system's center of gravity 5 can be brought closer to the ideal position of the vertical support surface A, enhancing the load balancing effect and improving the equipment's adaptability to different working conditions.

[0039] In this embodiment, the connection point between the linear drive mechanism 2 and the lifting plate 301 is the drive point; the heavy-duty vertical guide rod 304 and the light-duty vertical guide rod 305 are arranged symmetrically about the drive point.

[0040] Ideally, when the drive point coincides with the system's center of gravity 5, and the heavy-load vertical guide rod 304 and the light-load vertical guide rod 305 are symmetrically arranged about the drive point, the drive point will not generate an off-center load moment on the vertical support surface A, and can ensure the smooth up-and-down sliding of the heavy-load vertical guide rod 304 and the light-load vertical guide rod 305.

[0041] In reality, due to the uncontrollable shape and size of components or other limitations, the driving point and the system center of gravity 5 often have a certain degree of offset. Therefore, this utility model adds a detachable counterweight 9 in the light load area. By matching different counterweights 9, the position of the system center of gravity 5 can be finely adjusted to meet the ideal state of "the driving point coincides with the system center of gravity 5, and the heavy load vertical guide rod 304 and the light load vertical guide rod 305 are symmetrically arranged about the driving point".

[0042] Optionally, the line connecting the heavy-load center of gravity 6 and the light-load center of gravity 7 is orthogonal to the vertical support surface A (the line connecting the heavy-load center of gravity 6 and the light-load center of gravity 7 is perpendicular to the vertical support surface A) or oblique to it (the line connecting the heavy-load center of gravity 6 and the light-load center of gravity 7 forms an acute angle with the vertical support surface A).

[0043] When the axes are at an oblique angle, the stress concentration area formed by the heavy-load center of gravity 6, the heavy-load vertical guide rod 304, the light-load vertical guide rod 305, and the light-load center of gravity 7 is larger, which helps to avoid excessive local stress concentration on the lifting plate. Furthermore, when the axes are at an oblique angle, if an accident causes the heavy-load side to tip over, the lifting plate 301 will also tip over along the inclined vertical support surface A, rather than collapsing directly downwards, thereby reducing damage to the equipment directly below the stirring head 404. Of course, in some other embodiments, an orthogonal arrangement can also be chosen, and this utility model is not limited to this.

[0044] Example 2

[0045] This embodiment provides a stirring device, which includes the anti-eccentric lifting device described in Embodiment 1 above, and has the same function and beneficial effects.

[0046] See Figures 2-4 In this embodiment, the stirring device includes: Any of the anti-eccentric lifting devices described in Example 1; The stirring assembly 4 includes a stirring motor 401 fixed to one end of the lifting plate 301, a stirring shaft 402 rotatably mounted on the other end of the lifting plate 301 about a vertical axis and driven by the stirring motor 401, a transmission component 403 extending along the length of the lifting plate 301 and driving the drive shaft of the stirring motor 401 to the upper end of the stirring shaft 402, and a stirring head 404 fixed to the lower end of the stirring shaft 402.

[0047] Optionally, the transmission component 403 is a transmission belt, chain, or gear assembly.

[0048] At this time, the heavy load is the stirring motor 401, and the center of gravity 6 of the heavy load is located on the central axis of the stirring motor 401; the light load is the stirring shaft 402 and the stirring head 404, and the center of gravity 7 of the light load is located on the central axis of the stirring shaft 402.

[0049] The innovative application of an asymmetrical lifting device to a mixing unit perfectly solves a long-standing technical challenge in the mixing field. This integrated solution is particularly well-suited to the inherently uneven load characteristics of mixing equipment, effectively mitigating the torque issues caused by heavy-duty motors through a carefully designed asymmetrical structure. This design not only significantly improves the reliability and lifespan of the equipment but also makes the mixing process smoother and more efficient. In actual production, this innovative structure significantly reduces maintenance costs and the risk of production interruptions, providing strong support for continuous production.

[0050] In this embodiment, a shelf 103 is also fixed above the base plate 101, and the height of the shelf 103 is lower than that of the base top plate 102. The shelf 103 is used to place the glue bucket so that the stirring head 404 can extend downward into the glue bucket for stirring. The shelf 103 provides a professional functional platform for stirring operations, and its height design, which is lower than that of the base top plate 102, ensures that the stirring head 404 can fully penetrate into the container, while avoiding spatial interference between the container and the upper structure.

[0051] In this embodiment, the drive shaft of the stirring motor 401, the drive end 201 of the linear drive mechanism 2, and the stirring shaft 402 are all perpendicular to the lifting plate 301. This strictly defined vertical axis relationship establishes a clear mechanical environment for the system. By ensuring that the axes of all key components are perpendicular to the lifting plate 301, the generation of complex spatial force systems is effectively avoided. This standardized arrangement not only simplifies force analysis but also guarantees the practical effect of the asymmetric balance mechanism. The strict adherence to the vertical relationship ensures that both the lifting motion and the stirring rotation remain on precise trajectories, providing a fundamental guarantee for process quality.

[0052] Furthermore, the drive shaft of the stirring motor 401, the drive end 201 of the linear drive mechanism 2, and the stirring shaft 402 are coplanar on the bisecting vertical plane 8. The bisecting vertical plane 8 passes through the geometric center 3011 of the lifting plate 301 and bisects the lifting plate 301. The heavy-load vertical guide rod 304 and the light-load vertical guide rod 305 are asymmetrically arranged on both sides of the dividing vertical plane 8, and the distances from the dividing vertical plane 8 to the two are equal.

[0053] The principle of coplanar symmetry pushes the geometric coordination of the equipment to its extreme. By constraining all moving parts within a central vertical plane and maintaining symmetrical spacing of the guide rods, an optimal spatial balance is created. This layout ensures asymmetrical functional requirements while maximizing the overall structural symmetry, satisfying both mechanical performance requirements and manufacturability. This meticulously designed spatial relationship allows the equipment to achieve a higher level of operational stability and visual aesthetics.

[0054] It should be noted that the linear drive mechanism mentioned in this utility model can be a cylinder, hydraulic cylinder, electric cylinder, or motor lead screw linear module, etc., and the rotary drive mechanism mentioned can be a brushed motor, brushless motor, or rotary cylinder, etc. This utility model does not limit the specific structural form of the linear drive mechanism and the rotary drive mechanism.

[0055] Finally, it should be noted that although the above embodiments have been described in the text and drawings of this application, this should not limit the scope of patent protection of this application. Any technical solutions that are based on the essential concept of this application and utilize the content described in the text and drawings of this application, resulting in equivalent structural or procedural substitutions or modifications, as well as the direct or indirect application of the technical solutions of the above embodiments to other related technical fields, are all included within the scope of patent protection of this application.

Claims

1. An anti-eccentric load lifting device, characterized in that, include: Base assembly (1); A lifting assembly (3) is disposed opposite to the base assembly (1), and the lifting assembly (3) includes: A lifting plate (301) is provided at one end for a heavy load area for hanging heavy loads and at the other end for a light load area for hanging light loads. After the heavy load area and the light load area are respectively hung with loads, the lifting assembly (3) and the loads hung at both ends of the lifting plate (301) together constitute a lifting system. The center of gravity (5) of the lifting system is located on the side of the lifting plate (301) near the geometric center (3011) of the lifting plate (301). A heavy load vertical guide rod (304) and a light load vertical guide rod (305) are provided. The top of the heavy load vertical guide rod and the light load vertical guide rod are fixed to the lifting plate (301), and the bottom of the heavy load vertical guide rod and the light load vertical guide rod are slidably connected to the base assembly (1). A linear drive mechanism (2) is mounted on the base assembly (1) and its drive end is connected to the lifting plate (301) to drive the lifting assembly (3) to slide back and forth relative to the base assembly (1). in: Both the heavy-duty vertical guide rod and the light-duty vertical guide rod are perpendicular to the lifting plate (301), and the axes of the heavy-duty vertical guide rod and the light-duty vertical guide rod form a vertical support surface A; The distance L1 from the heavy load center of gravity (6) to the vertical support surface A is less than the distance L2 from the light load center of gravity (7) to the vertical support surface A, so as to balance the torque on both sides of the vertical support surface A.

2. The anti-eccentric load lifting device according to claim 1, characterized in that, The light-load area is detachably equipped with a counterweight (9) for adjusting the position of the system's center of gravity (5).

3. The anti-eccentric load lifting device according to claim 1, characterized in that, The connection point between the linear drive mechanism (2) and the lifting plate (301) is the drive point; The heavy-duty vertical guide rod and the light-duty vertical guide rod are arranged symmetrically about the driving point.

4. The anti-eccentric lifting device according to claim 3, characterized in that, The line connecting the heavy-load center of gravity (6) and the light-load center of gravity (7) is orthogonal or oblique to the vertical support surface A.

5. The anti-eccentric lifting device according to claim 3, characterized in that, The base assembly (1) includes a base bottom plate (101) and a base top plate (102) fixedly disposed above the base bottom plate (101) at intervals. The linear drive mechanism (2) is mounted and fixed on the base plate (101), and the lower ends of the heavy-duty vertical guide rod and the light-duty vertical guide rod are slidably connected to the base top plate (102).

6. The anti-eccentric lifting device according to claim 5, characterized in that, The base plate (102) is provided with two guide rod mounting holes (1021). A linear bearing is fixed in the guide rod mounting hole (1021) for the corresponding heavy-duty vertical guide rod or light-duty vertical guide rod to slide up and down.

7. A stirring device, characterized in that, include: The anti-eccentric lifting device according to any one of claims 1-6; The stirring assembly (4) includes a stirring motor (401) fixed to one end of the lifting plate (301), a stirring shaft (402) rotatably mounted on the other end of the lifting plate (301) about a vertical axis and driven by the stirring motor (401), and a stirring head (404) fixed to the lower end of the stirring shaft (402).

8. The stirring device according to claim 7, characterized in that, The stirring assembly (4) further includes a transmission component (403) that extends along the length of the lifting plate (301) and drives the drive shaft of the stirring motor (401) to the upper end of the stirring shaft (402).

9. The stirring device according to claim 8, characterized in that, The transmission component (403) is a transmission belt, chain, or gear assembly.

10. The stirring device according to claim 7, characterized in that, The drive shaft of the stirring motor (401), the drive end (201) of the linear drive mechanism (2), and the stirring shaft (402) are all perpendicular to the lifting plate (301). The drive shaft of the stirring motor (401), the drive end (201) of the linear drive mechanism (2), and the stirring shaft (402) are coplanar on the mid-vertical plane (8). The mid-vertical plane (8) passes through the geometric center (3011) of the lifting plate (301) and bisects the lifting plate (301). The heavy-duty vertical guide rod (304) and the light-duty vertical guide rod (305) are asymmetrically arranged on both sides of the dividing vertical plane (8), and the distances from the dividing vertical plane (8) to the two are equal.

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