Double-shaft ointment stirring device
The double-shaft ointment stirring device addresses uneven mixing and dead angles by using symmetrical, eccentrically mounted stirring rods to ensure thorough and uniform mixing of ointments with varying fluidity and viscosity, reducing torque and vibration.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- HEBEI HUASHENG PLASTIC & RUBBER MACHINERY CO LTD
- Filing Date
- 2023-04-26
- Publication Date
- 2026-05-14
AI Technical Summary
Conventional ointment mixing devices have a narrow applicability range, often resulting in uneven mixing, dead angles, and are ineffective for highly viscous ointments, leading to prolonged mixing times, air introduction, and device vibration, which affects the quality and dosage of the ointment.
A double-shaft ointment stirring device with eccentrically mounted first and second stirring shafts and rods, aligned with the container edge, allowing for symmetrical and balanced rotation to eliminate dead angles and enhance mixing uniformity, while reducing torque and vibration.
The device achieves thorough mixing without dead angles, reduces pore formation, extends motor lifespan, and facilitates easy cleaning, suitable for ointments with varying fluidity and viscosity.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of paste production, and particularly to a double-shaft ointment stirring device.
Background Art
[0002] The preparation of ointments is an extremely important step in the manufacturing process of ointments. Whether the ointment is sufficiently and uniformly mixed directly determines the drug volume, i.e., the stability of the dosage, which is a necessary requirement for therapeutic drug volume and is something that the pharmaceutical regulatory department is paying attention to. Conventional ointment mixing devices usually have a single-axis mixing structure, but in order to increase the degree of mixing of the single-axis mixing rod, multiple mixing teeth can be provided on the single-axis mixing rod, or multiple mixing rods can be made to protrude. With such a mixing structure, when mixing ointments with good fluidity, uneven mixing is not noticeable. However, when mixing ointments with slightly poor fluidity or slightly high viscosity, because there is no fitting between the edges of the mixing teeth or mixing rods and the inner wall of the container holding the ointment (hereinafter abbreviated as "container"), the ointment tends to adhere to the inner wall of the container, forming a mixing dead angle and resulting in uneven mixing of the ointment. Therefore, the applicability range of conventional ointment mixing devices is very narrow. Even if the edges of the stirring teeth or stirring rods are positioned to fit the inner wall of the container, the stirring effect is minimal. Because the upper and lower stirring teeth and stirring rods do not have a consistent structure, when they rotate, they tend to move in a parallel manner, resulting in a mixing pattern that is only achieved in the parallel area where the stirring teeth and stirring rods can make contact, and in the vicinity thereof. As a result, the mixing strength of the ointment in the other vertical areas is significantly weakened. On the other hand, this stirring structure makes it impossible to stir highly viscous ointments such as gel ointments, honey ointments, and rubber ointments. Even if conventional stirring devices can forcibly stir highly viscous ointments, by providing a very large number of stirring teeth on the stirring shaft, the entire ointment in the container can be stirred uniformly. However, in this process, the torque applied to the stirring shaft and the unbalanced force of a single stirring shaft cause the entire machine to vibrate significantly, greatly affecting the lifespan of the stirring motor. Furthermore, it takes a very long time to uniformly stir highly viscous ointments, and it also affects the effectiveness of the medicine. Conventional mixing devices, while capable of uniformly mixing highly viscous ointments, often introduce a large amount of air during mixing, leading to pore formation that affects the quality and dosage of the ointment. Furthermore, conventional mixing devices were unable to exhaust the ointment. Additionally, when mixing highly viscous ointments, conventional devices commonly exhibited a tendency for the ointment to rise along the mixing rod, further impacting the uniformity of the mixing and hindering the subsequent cleaning of the mixing device. [Overview of the project] [Problems that the invention aims to solve]
[0003] The object of the present invention is to provide a double-shaft ointment stirring device that has a wide range of applications, no stirring dead angle, allows exhaust of ointment during stirring, the ointment after stirring is thoroughly mixed and uniform, has few pores, the force applied to the stirring shaft is small, the lifespan is long, and the stirring rod is easy to clean. [Means for solving the problem]
[0004] To achieve the above objective, the present invention employs the following technical solution. This is a double-shaft ointment stirring device, which has a base on which a rotatable first stirring shaft and a rotatable second stirring shaft are provided, a first stirring rod is provided on the first stirring shaft and a second stirring rod is provided on the second stirring shaft, both of which are eccentrically mounted on a turntable, the turntable is rotatably connected to a first drive unit, the first drive unit is for driving the rotation of the turntable, and the outer edges of the first stirring rod and the outer edges of the second stirring rod are aligned with the inner edge of the container for the ointment.
[0005] Preferably, the outer edges of the first stirring rod and the second stirring rod are in substantially contact with the inner edge of the container for the ointment, the first stirring shaft and the second stirring shaft are arranged axially symmetrically, and both the first stirring rod and the second stirring rod are basically S-shaped or arc-hook shaped. Preferably, both the first stirring rod and the second stirring rod are rotatably connected to the second drive unit. Preferably, the first stirring shaft is rotatably connected to the first drive gear, the second stirring shaft is rotatably connected to the second drive gear, both the first and second drive gears are rotatably connected to the second propeller shaft, the second propeller shaft is rotatably connected to the second drive device, and the second drive device drives the rotation of the first and second drive gears by driving the second propeller shaft, further driving the rotation of the first and second stirring shafts, and further realizing the rotation of the first and second stirring rods.
[0006] Preferably, the turntable is rotatably connected to a first propeller shaft having a hollow structure, the first propeller shaft is rotatably connected to a first drive unit, the first drive unit drives the first propeller shaft to rotate the turntable, and further causes the first stirring rod and the second stirring rod on the turntable to rotate around their axes, the second propeller shaft is positioned on the first propeller shaft and is provided coaxially with the first propeller shaft. Preferably, both the first drive gear and the second drive gear are meshed with a common gear, and the common gear is provided on the second propeller shaft. Preferably, both the first stirring rod and the second stirring rod are provided with a ridge extending along the direction in which the first and second stirring rods extend. Preferably, the base is further provided with a height-adjustable platen, which is located below the first stirring rod and the second stirring rod.
[0007] Preferably, the first and second stirring shafts are fixed to a turntable via a first bearing, the second bearing is positioned on the second propeller shaft, the outer ring of the second bearing is fixed to the first propeller shaft, and the second and first propeller shafts rotate relative to each other via the second bearing. More preferably, the first propeller shaft is connected to a first drive unit via a transmission mechanism, the first drive unit being a first drive motor, and the second drive unit being a second drive motor. [Effects of the Invention]
[0008] In the above embodiment, a first stirring shaft and a second stirring shaft are provided eccentrically symmetrically on a rotating platform. The first stirring shaft causes the first stirring rod to rotate around its own axis, forming a substantially cylindrical first stirring area that is almost in contact with the inner edge of the container. The first stirring rod stirs and mixes the ointment in the first stirring area and the surrounding area. The second stirring rod rotates around its own axis due to the second stirring shaft, forming a substantially cylindrical second stirring area that is in contact with the inner circumferential edge of the container. The second stirring rod stirs and mixes the ointment in the second stirring area and the surrounding area. The rotating platform rotates the first and second stirring shafts, causing the first and second stirring areas to move in a circular motion along the inner circumferential edge of the container, so that the first and second stirring areas pass through the entire area of the inner circumferential edge of the container. Alternatively, only the first and second stirring rods are made to move in a circular motion along the inner circumferential edge of the container to achieve stirring and mixing of all the ointment in the container. The first and second stirring rods are designed to pass through the container integrally in an S-shape or arc-hook shape, allowing them to rotate around their own axis, taking into account any vertical area within their respective stirring areas, thereby scraping the ointment at the inner edge of the container without any dead angles during stirring. By positioning the second propeller shaft on the first propeller shaft, relative rotation between the second and first propeller shafts is achieved, enabling independent rotation control of the first and second stirring shafts and the turntable, causing the first and second stirring areas to move in a circular motion along the inner edge of the container. Alternatively, it is possible to switch between three modes: circular motion of only the first and second stirring rods along the inner periphery of the container, and rotation of only the first and second stirring rods around their own axis. When the first and second stirring rods move in a circular motion along the inner periphery of the container, there is a tensile effect on the ointment. Similar to everyday life, when making dough, the process involves continuously pulling one dough onto the other to make the dough smoother and more uniform, thus speeding up the mixing and making the ointment more even. The roughly S-shaped or arc-hook shaped first and second stirring rods, working in cooperation with their own ridges, have a conveying force that is closer to a spiral when rotating around their axis, unlike the parallel stirring of ordinary stirring teeth.Therefore, when it rotates around its own axis and moves in a circular motion along the inner periphery of the container, a nearly spiral conveying force and rotary cutting force are generated from top to bottom, preventing the ointment from rising from bottom to top along the stirring rod, allowing the ointment to be exhausted, and at the same time the number of air holes in the ointment is greatly reduced, resulting in more uniform mixing of the drug and easier cleaning of the stirring rod. In addition, when the first stirring rod rotates around its own axis due to the first stirring shaft, the first stirring rod stirs and mixes only the ointment within and near the first stirring area. The second stirring rod does not stir all the ointment in the container simultaneously with a single stirring shaft as in conventional systems, but stirs and mixes only the ointment within and near the second stirring area. As a result, the forces acting on the first and second stirring rods are greatly reduced, and the first and second stirring rods form a balancing effect with each other, greatly reducing vibration. Therefore, this stirring device is suitable not only for stirring ointments with good fluidity but also for stirring ointments with poor fluidity and high viscosity. [Brief explanation of the drawing]
[0009] [Figure 1] Figure 1 is a schematic diagram of the entire double-shaft ointment stirring apparatus (cross-sectional structure of the rotating platform and the first propeller shaft, with the base plate at the top). [Figure 2] Figure 2 is a schematic diagram of the entire double-shaft ointment stirring apparatus (cross-sectional structure of the rotating platform and the first propeller shaft, with the base plate at a low position). [Figure 3] Figure 3 is a schematic diagram of a partially enlarged view. [Figure 4] Figure 4 is a schematic diagram of the three-dimensional structure of the first stirring rod. [Figure 5] Figure 5 is a schematic diagram of the three-dimensional structure of the first stirring rod from a different viewpoint. [Modes for carrying out the invention]
[0010] The present invention will be further described below with reference to the drawings. As shown in Figures 1 to 5, this double-shaft ointment stirring device includes a base 1, and the base 1 is equipped with a first stirring shaft 2 that can rotate around its own axis and a second stirring shaft 3 that can rotate around its own axis. The first stirring shaft 2 is provided with a first stirring rod 21 that is roughly S-shaped or arc-hook shaped. The second stirring shaft 3 is provided with a second stirring rod 31 that is roughly S-shaped or arc-hook shaped.
[0011] The first stirring shaft 2 and the second stirring shaft 3 are eccentrically mounted on the turntable 4, and the turntable 4 is rotatably connected to the first drive unit 5. The first drive unit 5 is preferably a first drive motor to drive the rotation of the turntable 4. The first stirring shaft 2 and the second stirring shaft 3 are symmetrically mounted, and the outer edge 22 of the first stirring rod and the outer edge 32 of the second stirring rod are aligned with the inner edge of the container 10 for the ointment. In this state, the outer edge 22 of the first stirring rod and the outer edge 32 of the second stirring rod are in contact with the inner edge of the container 10, and when the first stirring rod 21 rotates, the outer edge 22 of the first stirring rod may extend to approximately the center of the container 10, or it may extend beyond the center of the container 10 and approach the second stirring shaft 3.
[0012] As the second stirring rod 31 rotates, the outer edge 32 of the second stirring rod may extend almost to the center of the container 10, or it may extend beyond the center of the container 10 and approach the first stirring shaft 2. However, the outer edge 22 of the first stirring rod and the outer edge 32 of the second stirring rod do not collide or interfere with each other during rotation. In this way, the first stirring shaft 2 causes the first stirring rod 21 to rotate around its own axis, forming a roughly cylindrical first stirring area that is almost in contact with the inner periphery of the container 10.
[0013] The first stirring rod 21 stirs and mixes the ointment in the first stirring area and its vicinity. The second stirring rod 31 rotates on its axis by the second stirring shaft 3, forming a roughly cylindrical second stirring area that is almost in contact with the inner periphery of the container 10. The second stirring rod 31 stirs and mixes the ointment in the second stirring area and its vicinity. The first drive device 5 drives the rotation of the turntable 4, further rotating the first stirring shaft 2 and the second stirring shaft 3, and further causing the first and second stirring areas to move in a circular motion along the inner periphery of the container, so that the first and second stirring areas pass through the entire area of the inner periphery of the container.
[0014] Alternatively, the first stirring rod 21 and the second stirring rod 31 are made to move in a circular motion along the inner periphery of the container. The first stirring rod 21 and the second stirring rod 31 are designed to penetrate integrally through the container in an S-shape or arc-hook shape, rotating around their own axis, taking into account any vertical area within their respective stirring areas. This scrapes the ointment from the inner periphery of the container 10, preventing ointment from adhering to the inner periphery and affecting the uniformity of the ointment mixing. Therefore, this stirring structure has no dead angle in stirring and can achieve stirring and mixing of all the ointment in the container 10.
[0015] If the fluidity of the ointment to be stirred is poor, the first stirring rod 21 and the second stirring rod 31 move in a circular motion along the inner periphery of the container 10, which also exerts a pulling effect on the stirring agent. Similar to everyday life, when making dough, one part of the dough is pulled towards the other to make it smoother and more uniform faster. Combining these two types of motion allows for faster and more uniform mixing of the ointment. The roughly S-shaped or arc-hook shaped first stirring rod 21 and the second stirring rod 31 have a near-spiral conveying force when they rotate around their own axis. Unlike the parallel stirring of normal stirring teeth, when they rotate around their own axis and move in a circular motion along the inner periphery of the container, they generate a near-spiral conveying force, forcibly expelling the ointment and reducing the pores within the ointment.
[0016] Also, when the first stirring shaft 2 causes the first stirring shaft 21 to rotate about its own axis, the first stirring shaft 21 stirs and mixes only the ointment within the first stirring area and near the first stirring area. The second stirring rod 31 does not stir all the ointment in the container simultaneously with a single stirring shaft as in the prior art, but stirs and mixes only the ointment within the second stirring area and near the second stirring area. For this reason, the forces applied to the first stirring rod 21 and the second stirring rod 31 are significantly reduced, and the first stirring rod 21 and the second stirring rod 31 form a balance effect with each other, significantly reducing vibration.
[0017] In a preferred embodiment, both the first stirring rod 21 and the second stirring rod 31 are rotationally connected to the second driving device 6. The second driving device 6 is preferably a second driving motor. Specifically, the first stirring shaft 2 is rotationally connected coaxially with the first driving gear 23. The second stirring shaft 3 is rotationally connected coaxially with the second driving gear 33. Both the first driving gear 23 and the second driving gear 33 are rotationally connected to the second propeller shaft 34. The second propeller shaft 34 is rotationally connected to the second driving device 6. By driving the second propeller shaft 34, the second driving device 6 simultaneously rotationally drives the first driving gear 23 and the second driving gear 33, drives the rotation of the first stirring shaft 2 and the second stirring shaft 3, and further realizes the rotation of the first stirring rod 21 and the second stirring rod 31.
[0018] A common gear 35 coaxial with the second propeller shaft 34 is installed, and the first drive gear 23 and the second drive gear 33 are meshed with the common gear 35. By driving the second propeller shaft 34 in this way, the first driving gear 23 and the second driving gear 33 can be simultaneously rotationally driven, and the first stirring shaft 2 and the second stirring shaft 3 can be symmetrically and evenly rotated in the same direction. Also, collision interference between the outer edges 22 of the first stirring rod and the outer edges 32 of the second stirring rod during rotation can be avoided.
[0019] In a preferred embodiment, the turntable 4 is rotatably connected to a first propeller shaft 41 having a hollow structure. The first propeller shaft 41 is rotatably connected to a first driving device 5. The first driving device 5 drives the first propeller shaft 41 to drive the rotation of the turntable 4, thereby causing the first stirring rod 21 and the second stirring rod 31 on the turntable 4 to perform a rotational movement around the axis. The second propeller shaft 34 is disposed on the first propeller shaft 41 and is coaxially disposed with the first propeller shaft 41, whereby independent rotation control of the first stirring shaft 2 and the second stirring shaft 3 and independent rotation control of the turntable 4 are realized, and further, the first stirring area and the second stirring area are realized to perform a circular motion along the inner peripheral edge of the container.
[0020] Alternatively, by switching among three modes of causing only the first stirring rod 21 and the second stirring rod 31 to perform a circular motion along the inner peripheral edge of the container and causing only the first stirring rod 21 and the second stirring rod 31 to rotate around their own axes, the mixing of the ointment can be made faster and more uniform. To enhance the rotational reliability of each member, the first stirring shaft 2 and the second stirring shaft 3 are respectively fixed to the turntable 4 via two to three first bearings 24, and a second bearing 36 is disposed on the second propeller shaft 34, and the outer ring of the second bearing 36 is fixed to the first propeller shaft 41. By the installation of the second bearing 36, relative rotation between the second propeller shaft 34 and the first propeller shaft 41 is realized. The second propeller shaft 34 protrudes from the first propeller shaft 41 and is rotatably connected to a second driving device 6. The first propeller shaft 41 is connected to the first driving device 5 via a transmission mechanism 43 to avoid positional interference between the first driving device 5 and the second driving device 6. This transmission mechanism 43 may be a gear transmission, or may be a chain transmission or a belt transmission.
[0021] In a preferred embodiment, the base 1 is provided with a liftable surface plate 7, and the surface plate 7 is provided below the first stirring rod 21 and the second stirring rod 31 to place and lift the container 10, and realize the insertion of the first stirring rod 21 and the second stirring rod 31 into the container and the detachment from the container.
[0022] In a preferred embodiment, the first stirring rod 21 and the second stirring rod 31 are further provided with ridges 8 extending along the direction of extension of the first stirring rod 21 and the second stirring rod 31. Two to four ridges 8 can be provided, and the outermost ridge is in contact with the inner edge of the container, further enhancing the effect of the first stirring rod 21 and the second stirring rod 31 in scraping the inner wall of the container. At the same time, by combining an S-shaped or arc-hook shaped first stirring rod 21 and second stirring rod 31, instead of directly rotary cutting the entire arc surface of the first stirring rod 21 and the second stirring rod 31 with the ointment, when they rotate around their own axis and move in a circular motion along the inner circumference of the container, a substantially spiral conveying force and substantially rotary cutting force of the cutting edge are generated from top to bottom, which exhausts the ointment and at the same time effectively prevents the ointment from rising up and down along the stirring rod, further improving the uniformity of ointment stirring and making it easier to clean the stirring rod.
[0023] In the above technique, after placing the ointment to be stirred in container 10, the base plate 7 is raised and the first stirring rod 21 and the second stirring rod 31 are inserted into the container 10. The rotation of the second drive unit 6 is controlled, and the second drive unit 6 drives the second propeller shaft 34, simultaneously rotating the first drive gear 23 and the second drive gear 33, and further driving the first stirring shaft 2 and the second stirring shaft 3 to rotate in the same direction and symmetrically, and further causing the first stirring shaft 21 and the second stirring shaft 31 to rotate around their own axes, rotating the first stirring shaft 2 and the second stirring shaft 3 in a symmetrical balance and in the same direction. The first stirring rod 21 stirs and mixes the ointment in the first stirring area and its vicinity, and the second stirring rod 31 stirs and mixes the ointment in the second stirring area and its vicinity. The first drive unit 5 drives the rotation of the turntable 4 via the first propeller shaft 41, rotating the first stirring shaft 2 and the second stirring shaft 3, and further causing the first stirring area and the second stirring area to move in a circular motion along the inner circumference of the container, so that the first stirring area and the second stirring area pass through the entire area of the inner circumference of the container.
[0024] Alternatively, the first stirring rod 21 and the second stirring rod 31 are made to move in a circular motion along the inner periphery of the container, and while the first stirring rod 21 and the second stirring rod 31 rotate around their own axes, they scrape the ointment from the inner periphery of the container 10, taking into account any vertical area within their respective stirring areas, thereby achieving stirring and mixing of all the ointment in the container 10. When the first stirring rod 21 and the second stirring rod 31 move in a circular motion along the inner periphery of the container 10, there is a pulling effect on the ointment, resulting in faster and more uniform mixing of the ointment. The first stirring rod 21 and the second stirring rod 31, which are roughly S-shaped or arc-hook shaped, rotate around their own axes and generate a roughly spiral conveying force when they move in a circular motion along the inner periphery of the container, forcibly exhausting the ointment and reducing the pores within the ointment. Therefore, this stirring device is suitable not only for stirring ointments with good fluidity but also for stirring ointments with poor fluidity and high viscosity.
[0025] This embodiment is an explanation of the spirit and implementation of the present invention, and is not limiting thereto. Technical means that have not been substantially transformed under the spirit of the present invention remain within the scope of protection.
Claims
1. A base is provided, and a rotatable first stirring shaft and a rotatable second stirring shaft are provided on the base, a first stirring rod is provided on the first stirring shaft, and a second stirring rod is provided on the second stirring shaft, The first stirring shaft and the second stirring shaft are both mounted eccentrically on a rotating platform, and the rotating platform is rotatably connected to a first propeller shaft having a hollow structure. The first propeller shaft is rotatably connected to the first drive unit, and the first drive unit drives the rotation of the turntable by driving the first propeller shaft, and further causes the first stirring rod and the second stirring rod on the turntable to rotate around their axes. The outer edges of the first stirring rod and the outer edges of the second stirring rod are aligned with the inner edge of the container for the ointment, and the first stirring shaft and the second stirring shaft are fixed to the rotating table via a first bearing. The first stirring shaft is rotatably connected to the first drive gear, the second stirring shaft is rotatably connected to the second drive gear, both the first drive gear and the second drive gear are rotatably connected to the second propeller shaft, and the second propeller shaft is rotatably connected to the second drive unit. The second drive device drives the second propeller shaft, thereby driving the rotation of the first drive gear and the second drive gear, further driving the rotation of the first stirring shaft and the second stirring shaft, and further enabling the rotation of the first stirring rod and the second stirring rod. The second propeller shaft is positioned on the first propeller shaft, and the second propeller shaft is provided coaxially with the first propeller shaft. A double-shaft ointment stirring device characterized in that a second bearing is positioned on the second propeller shaft, the outer ring of the second bearing is fixed to the first propeller shaft, and the second propeller shaft and the first propeller shaft rotate relative to each other via the second bearing.
2. The double-shaft ointment stirring device according to claim 1, characterized in that the outer edge of the first stirring rod and the outer edge of the second stirring rod are in substantially contact with the inner edge of a container for holding ointment, the first stirring shaft and the second stirring shaft are arranged axially symmetrically, and both the first stirring rod and the second stirring rod are S-shaped hooks.
3. The double-shaft ointment stirring device according to claim 1, characterized in that the first drive gear and the second drive gear are both meshed with a common gear, and the common gear is provided on the second propeller shaft.
4. The double-shaft ointment stirring device according to claim 1 or claim 2, characterized in that both the first stirring rod and the second stirring rod are provided with a ridge extending along the direction in which the first stirring rod and the second stirring rod extend.
5. The double-shaft ointment stirring device according to claim 1 or claim 2, characterized in that the base is further provided with a height-adjustable platen, the platen being located below the first stirring rod and the second stirring rod.
6. The double-shaft ointment stirring device according to claim 1, characterized in that the first propeller shaft is connected to the first drive unit via a transmission mechanism, the first drive unit is a first drive motor, and the second drive unit is a second drive motor.