Sample mixing mechanism
Through the design of meshing gear and rotary link mechanism, the structure of the sample mixing mechanism is simplified and stable, and the problems of low sample mixing efficiency and difficult maintenance in the prior art are solved, and efficient and uniform sample mixing effect is achieved. .
Patent Information
- Application Number
- CN202110782634.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-07-12
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2041-07-12
AI Technical Summary
The existing sample mixing mechanism has a complex structure, is huge in size, is expensive and difficult to maintain. The movement trajectory rotates in one direction, and frequent shutdowns and starts up, resulting in damage to the motor, making it impossible to achieve efficient and uniform sample mixing.
A sample mixing mechanism including equal-sized and meshed driving gears and driven gears is designed. The high-speed forward and reverse rotation of the sample cup is achieved without motor deceleration and steering without motor deceleration. The multi-curve 8-shaped motion trajectory uses support frame and connecting rod structure to form a quadrilateral structure to achieve multiple composite motion.
The sample mixing effect is achieved with a simple structure, stable operation and low maintenance cost. Through multiple dramatic rotation and collision contacts, the samples are fully mixed and suitable for different samples.
Smart Images
Figure CN113289540B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of sample mixing equipment, and in particular to a sample mixing mechanism. Background Art
[0002] Chemical analysis is an indispensable experimental step in medicine, biology, and chemistry, and is a necessary step for samples to transmit information. The complexity of sample properties faced by modern chemical analysis is unprecedented. The objects of analysis include not only all substances in gas, liquid, and solid phases, but also often exist in multiphase forms; their composition is not only complex, but also often interferes with each other during measurement; at the same time, the concentration of the detected object is low, and its stability changes at any time, which brings a series of difficulties to the analysis, so it often needs to be processed before measurement.
[0003] Sample mixing is a common method in sample processing. Its purpose is to make two or more samples fully contact, so as to improve the reaction rate, save experimental time, and optimize the experimental effect. In traditional analysis, manual mixing is used, which is slow, uneven, time-consuming and labor-intensive. In new analytical instruments, a matching mixing mechanism is usually provided to improve the mixing speed and mixing effect through mechanical mixing. However, the existing mixing mechanism has a complex structure, a large volume, high cost and is difficult to maintain. Secondly, the movement trajectory of the sample cup is mostly unidirectional. In order to achieve a good mixing effect, the motor needs to be stopped and restarted for reverse rotation. Frequent shutdown and start-up can easily cause damage to the motor. Summary of the invention
[0004] In order to solve the above problems, the present invention provides a sample mixing mechanism with a simple structure and long-lasting and stable operation, which can specifically adopt the following technical solutions:
[0005] The sample mixing mechanism of the present invention comprises:
[0006] A first rotating member having a first rotating shaft, wherein a first fixed shaft is disposed on the first rotating member;
[0007] A second rotating member having a second rotating shaft, wherein the second rotating shaft has the same rotation speed as the first rotating shaft but rotates in an opposite direction, and a second fixed shaft is disposed on the second rotating member;
[0008] A support frame is arranged on the first fixed shaft and the second fixed shaft, and includes a first connecting rod and a second connecting rod rotatably connected to the first fixed shaft, and a third connecting rod and a fourth connecting rod rotatably connected to the second fixed shaft, wherein the ends of the first connecting rod and the third connecting rod are hingedly connected, and the ends of the second connecting rod and the fourth connecting rod are hingedly connected;
[0009] A sample cup bracket, used for supporting the sample cup, is arranged on the first connecting rod and / or the second connecting rod and / or the third connecting rod and / or the fourth connecting rod;
[0010] When the first rotating shaft, the second rotating shaft, the first fixed shaft and the second fixed shaft are collinear, the center distance between the first rotating shaft and the second rotating shaft is equal to the center distance between the first fixed shaft and the second fixed shaft.
[0011] The first rotating member and the second rotating member are a driving gear and a driven gear of equal size and meshing with each other.
[0012] The first rotating shaft and the second rotating shaft are arranged on a frame, and a driving motor connected to the first rotating shaft is also arranged on the frame.
[0013] The frame is provided with a sensor for monitoring the rotation angle of the first rotating shaft.
[0014] The first fixed shaft is plug-connected with the first rotating member and fixed by a first connecting plate arranged on the first rotating member; the second fixed shaft is plug-connected with the second rotating member and fixed by a second connecting plate arranged on the second rotating member.
[0015] The first connecting rod and the second connecting rod are stacked up and down and connected to the first fixed shaft through a bearing, and the fourth connecting rod and the third connecting rod are stacked up and down and connected to the second fixed shaft through a bearing.
[0016] The first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are connected end to end to form a quadrilateral structure with equal sides.
[0017] There are two sample cup brackets, which are respectively arranged close to the hinged ends of the first connecting rod and the third connecting rod, and the hinged ends of the second connecting rod and the fourth connecting rod, and each sample bracket is provided with a plurality of sample cup placement positions.
[0018] The sample mixing mechanism provided by the present invention has an ingenious structure, stable operation, and low maintenance cost. Through the independently designed rotating connecting rod mechanism, multiple sample cups can simultaneously perform high-speed forward and reverse rotation and reciprocating multi-curve 8-shaped multiple compound motions without the need for motor deceleration and change of direction. The above-mentioned 8-shaped motion trajectory combines the advantages of multiple mixing methods. During this process, the running speed and running direction of the sample cup undergo multiple drastic changes, so that the samples placed therein fully collide and contact, and an excellent mixing effect is obtained. Secondly, the size of the "8" and the ratio of the long radius to the short radius of the two ellipses that make up the "8" can be adjusted by adjusting the size of the rotating connecting rod mechanism, so as to meet the mixing requirements of different samples. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a structural schematic diagram of the present invention.
[0020] Figure 2 yes Figure 1 main view.
[0021] Figure 3 yes Figure 2 Top view of the .
[0022] Figure 4 yes Figure 3 AA view.
[0023] Figure 5 It is a schematic diagram of the state in which the first fixed shaft and the second fixed shaft 5 rotate with the driving gear and the driven gear in the present invention. DETAILED DESCRIPTION
[0024] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific working process are given, but the protection scope of the present invention is not limited to the following embodiment.
[0025] like Figure 1-5 As shown, the sample mixing mechanism described in the present invention includes a first rotating member with a first rotating shaft and a second rotating member with a second rotating shaft. The first rotating member and the second rotating member are usually selected from a driving gear 1 and a driven gear 2 of equal size and meshing with each other. When the driving gear 1 rotates, the driven gear 2 rotates in the opposite direction at the same speed. The driving gear 1 and the driven gear 2 are both installed on the frame, and the central rotating shaft (i.e., the first rotating shaft) of the driving gear 1 is connected to the driving motor 3 through a coupling. In order to perform automatic control, a sensor for monitoring the rotation angle of the first rotating shaft is also installed on the frame. In addition to the above-mentioned double-gear transmission type constant speed forward and reverse rotation structure, the first rotating member and the second rotating member can also be designed as a synchronous belt pulley transmission mechanism and a gear rack transmission mechanism.
[0026] In order to install the support frame, installation grooves are provided on the driving gear 1 and the driven gear 2, which are used to insert the first fixed shaft 4 and the second fixed shaft 5 respectively. The first fixed shaft 4 is fixed by a first connecting plate 6 connected to the driving gear 1, and the second fixed shaft 5 is fixed by a second connecting plate 7 connected to the driven gear 2.
[0027] The support frame is a quadrilateral structure with equal sides, and is composed of a first connecting rod 8, a second connecting rod 9, a third connecting rod 10 and a fourth connecting rod 11 connected end to end. Among them, the first connecting rod 8 and the second connecting rod 9 are installed on the first fixed shaft 4, the two are stacked up and down, and are both rotatably connected to the first fixed shaft 4 through double-row angular contact bearings; the third connecting rod 10 and the fourth connecting rod 11 are installed on the second fixed shaft 5, and the fourth connecting rod 11 is stacked above the third connecting rod 10, and both are rotatably connected to the second fixed shaft 5 through double-row angular contact bearings; the other end of each connecting rod is divided into two groups of hinged connections, that is, the ends of the first connecting rod 8 and the third connecting rod 10 are hingedly connected, and the ends of the second connecting rod 9 and the fourth connecting rod 11 are hingedly connected.
[0028] The support frame is used to install the sample cup holder 12. In this embodiment, there are two sample cup holders 12, and each sample cup holder 12 is provided with three sample cup placement positions. One of the sample cup holders 12 is installed on the first connecting rod 8 near the hinged end of the first connecting rod 8 and the third connecting rod 10, and the other sample cup holder 12 is installed on the fourth connecting rod 11 near the hinged end of the second connecting rod 9 and the fourth connecting rod 11. The number of the above-mentioned sample cup holders 12 and the sample cup placement positions therein can be freely selected according to actual conditions. Secondly, the sample cup holder 12 can also be installed on the second connecting rod 9 and / or the third connecting rod 10.
[0029] Since the positions of the first fixed shaft 4 and the second fixed shaft 5 are relatively special, when the driving gear 1 and the driven gear 2 rotate, the sample cup holder 12 on the support frame can perform multiple reciprocating compound motions according to the 8-shaped motion trajectory. Due to its high running speed, the sample in the sample cup will collide violently with the cup wall, and continuously rotate forward and reverse, thereby effectively improving the mixing effect. Specifically, at the starting position of the device where the driving motor 3 stops running, the first fixed shaft 4 and the second fixed shaft 5 are both eccentrically arranged on the same side of the driving gear 1 and the driven gear 2, and the first fixed shaft 4, the second fixed shaft 5, and the central rotating shafts of the driving gear 1 and the driven gear 2 are all located on the same straight line. At this time, the center distance between the first fixed shaft 4 and the second fixed shaft 5 is equal to the center distance between the driving gear 1 and the driven gear 2. When the driving motor 3 is started, the driving gear 1 and the driven gear 2 rotate in opposite directions, and the angle α between the radius of the circle where the first fixed shaft 4 is located and the center connecting line L of the driving gear 1 and the driven gear 2 is always equal to the angle β between the radius of the circle where the second fixed shaft 5 is located and the center connecting line L.
[0030] The invention has an ingenious structure, requires a small number of parts, is easy to manufacture, and has a stable structure. It can achieve high-speed mixing of multiple sample cups, and effectively improves the mixing effect of the samples.
[0031] It should be noted that, in the description of the present invention, terms indicating orientation or positional relationships, such as "front", "rear", "left", "right", "vertical", "horizontal", "inside", "outside", etc., are based on the orientation or positional relationships shown in the drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
Claims
1. A sample mixing mechanism, characterized in that: include: A first rotating member having a first rotating shaft, wherein a first fixed shaft is disposed on the first rotating member; A second rotating member having a second rotating shaft, wherein the second rotating shaft has the same rotation speed as the first rotating shaft but rotates in an opposite direction, and a second fixed shaft is disposed on the second rotating member; A support frame is arranged on the first fixed shaft and the second fixed shaft, and includes a first connecting rod and a second connecting rod rotatably connected to the first fixed shaft, and a third connecting rod and a fourth connecting rod rotatably connected to the second fixed shaft, the ends of the first connecting rod and the third connecting rod are hingedly connected, the ends of the second connecting rod and the fourth connecting rod are hingedly connected, and the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are connected end to end to form a quadrilateral structure with equal sides; A sample cup bracket, used for supporting the sample cup, is arranged on the first connecting rod and / or the second connecting rod and / or the third connecting rod and / or the fourth connecting rod; Wherein, the first rotating member and the second rotating member are a driving gear and a driven gear of equal size and meshing with each other, and the driving gear is connected to the driving motor; At the starting position of the device where the driving motor stops running, the first fixed shaft and the second fixed shaft are both eccentrically arranged on the same side of the driving gear and the driven gear, and the first fixed shaft, the second fixed shaft, and the central rotating shafts of the driving gear and the driven gear are all located on the same straight line. At this time, the center distance between the first fixed shaft and the second fixed shaft is equal to the center distance between the driving gear and the driven gear; When the drive motor is started, the driving gear and the driven gear rotate in opposite directions, and the angle α between the radius of the circle where the first fixed axis is located and the center line L of the driving gear and the driven gear is always equal to the angle β between the radius of the circle where the second fixed axis is located and the center line L.
2. The sample mixing mechanism according to claim 1, characterized in that: The first rotating shaft and the second rotating shaft are arranged on a frame, and a driving motor connected to the first rotating shaft is also arranged on the frame.
3. The sample mixing mechanism according to claim 2, characterized in that: The frame is provided with a sensor for monitoring the rotation angle of the first rotating shaft.
4. The sample mixing mechanism according to claim 1, characterized in that: The first fixed shaft is plug-connected with the first rotating member and fixed by a first connecting plate arranged on the first rotating member; the second fixed shaft is plug-connected with the second rotating member and fixed by a second connecting plate arranged on the second rotating member.
5. The sample mixing mechanism according to claim 1, characterized in that: The first connecting rod and the second connecting rod are stacked up and down and connected to the first fixed shaft through a bearing, and the fourth connecting rod and the third connecting rod are stacked up and down and connected to the second fixed shaft through a bearing.
6. The sample mixing mechanism according to claim 1, characterized in that: There are two sample cup brackets, which are respectively arranged close to the hinged ends of the first connecting rod and the third connecting rod, and the hinged ends of the second connecting rod and the fourth connecting rod, and each sample bracket is provided with a plurality of sample cup placement positions.