Friction rotating mechanism and automatic blending instrument

Abstract

The utility model relates to a friction rotating mechanism and an automatic mixing instrument, the automatic mixing instrument comprises a sample carrying table and the friction rotating mechanism, the friction rotating mechanism comprises a fixed seat, a rotating shaft and a rotating assembly, the fixed seat is provided with an insertion hole, the rotating shaft is accommodated in the insertion hole and is eccentrically arranged with the central axis of the insertion hole, and the sample carrying table is connected to the rotating shaft; the rotating assembly is rotatably arranged on the rotating shaft in a sleeving mode, the outer circumferential face of the rotating assembly is fixedly sleeved with an O-shaped ring, and the O-shaped ring is used for making friction contact with the hole wall of the inserting hole when the rotating shaft eccentrically rotates around the central axis of the inserting hole, so that the rotating assembly can rotate around the central axis of the rotating assembly at the same time. Therefore, the existing sliding friction between the friction rotating mechanism and the inner wall of the instrument is converted into rolling friction, so that the abrasion phenomena, including rubber abrasion, dents generated on the inner wall of the instrument and the like, caused by friction are avoided, the material and cost requirements of the O-shaped ring are reduced, and the service life of the automatic blending instrument is greatly prolonged.

Description

Technical Field

[0001] The present application relates to the field of biological detection technology, and in particular to a friction rotation mechanism and an automatic mixer. Background Art

[0002] An automatic mixer is an instrument used for mixing liquids or solids in the laboratory. It is suitable for oscillating small amounts of samples and can be used to shake test tubes, centrifuge tubes, and other instruments. The basic operating principle of an automatic mixer is to utilize the eccentric oscillation effect of an eccentric wheel to create a vortex in the test tube, thoroughly mixing the reagents. To increase the reliability and service life of the automatic mixer and reduce the difficulty of installation, an automatic mixer is often equipped with a friction rotation mechanism.

[0003] In existing automated mixers, the frictional rotation mechanism primarily achieves rotational mixing through repeated friction between rubber and the instrument's inner wall. However, the rubber easily wears out during contact with the instrument's inner wall, affecting the instrument's positioning accuracy when stopped and even causing damage. Repeated friction with the rubber also creates irreversible dents on the instrument's inner wall, significantly reducing the instrument's service life. Utility Model Content

[0004] Based on this, it is necessary to provide a friction rotating mechanism and an automatic mixer including the friction rotating mechanism that can solve the above problem, in which the friction rotating mechanism in the existing automatic mixer repeatedly rubs against the inner wall of the instrument, causing wear of the rubber and the inner wall of the instrument or irreversible dents on the inner wall of the instrument, thereby significantly reducing the service life of the instrument.

[0005] According to one aspect of the present application, a friction rotation mechanism is provided, comprising:

[0006] A fixing seat, wherein the fixing seat is provided with a socket;

[0007] a rotating shaft, received in the socket and eccentrically disposed with respect to a central axis of the socket, the rotating shaft being capable of eccentrically rotating about the central axis of the socket;

[0008] A rotating assembly is rotatably sleeved on the rotating shaft, and an O-ring is fixedly sleeved on the outer circumference of the rotating assembly. The O-ring is used to frictionally contact the hole wall of the socket when the rotating shaft rotates eccentrically around the central axis of the socket, so that the rotating assembly can simultaneously rotate around its own central axis.

[0009] In one embodiment, the outer peripheral surface of the rotating shaft is provided with a mounting groove surrounding the central axis thereof, and the rotating assembly is at least partially accommodated in the mounting groove.

[0010] In one embodiment, gaps are formed correspondingly between two opposite side walls of the rotating assembly in its own axial direction and two opposite groove walls of the installation groove in its own axial direction.

[0011] In one embodiment, the rotating shaft includes a base and an upper cover connected to each other, and a first mounting groove surrounding its own central axis is opened at one end of the base close to the upper cover, and a second mounting groove surrounding its own central axis is opened at one end of the upper cover close to the base, and the first mounting groove and the second mounting groove together form the mounting groove.

[0012] In one embodiment, the O-ring is capable of recoverable deformation under the action of an external force.

[0013] In one embodiment, the rotating assembly includes a rotating bearing and a rotating clamp, the rotating bearing is rotatably coaxially sleeved on the rotating shaft, the rotating clamp is fixedly coaxially sleeved on the rotating bearing, and the O-ring is fixedly coaxially sleeved on the rotating clamp.

[0014] In one embodiment, the rotating assembly further includes a retaining ring, which is embedded in a gap formed between the rotating bearing in its own axial direction and the inner wall of the rotating clamp, and one side of the retaining ring abuts against one end of the rotating bearing in its own axial direction, and the other side abuts against the inner wall of the rotating clamp in its own axial direction.

[0015] According to another aspect of the present application, an automatic mixer is provided, comprising a sample carrier and a friction rotation mechanism as described in any of the above schemes, wherein an eccentric shaft capable of rotating around a rotation axis is provided on a fixed seat of the friction rotation mechanism, the sample carrier is connected to the eccentric shaft, and the rotation axis of the friction rotation mechanism is connected to the side of the sample carrier facing the fixed seat.

[0016] In one embodiment, there are a plurality of the insertion holes, all of which are spaced around the rotation axis, and there are correspondingly a plurality of rotation shafts, each of which is inserted into a corresponding one of the insertion holes.

[0017] In one embodiment, a plurality of mounting holes are provided on the fixing seat, and all the mounting holes and the insertion holes are alternately spaced around the rotation axis. A rolling ball is provided in each mounting hole, and the rolling ball is in rolling contact with the hole wall of the mounting hole and the sample carrier to support the sample carrier.

[0018] The friction rotation mechanism and automatic mixer described above utilize a rotating assembly rotatably mounted on the outer circumference of a rotating shaft, and an O-ring fixedly mounted on the outer circumference of the rotating assembly. This allows the O-ring to frictionally contact the wall of the insertion hole when the rotating shaft rotates eccentrically about the central axis of the mounting hole. This effectively utilizes the friction generated by the O-ring and the wall of the insertion hole to simultaneously drive the rotating assembly to rotate about its own central axis. This transforms the existing sliding friction between the friction rotation mechanism and the inner wall of the instrument into rolling friction, thereby avoiding wear caused by friction, including rubber wear and dents on the inner wall of the instrument. It also reduces the material and cost requirements for the O-ring, significantly extending the service life of the automatic mixer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an isometric view of an automatic mixer provided in one embodiment of the present application.

[0020] Figure 2 The automatic mixer provided in one embodiment of the present application hides the isometric view of the sample carrier.

[0021] Figure 3 The cross-sectional view of the automatic mixer provided in one embodiment of the present application hides the fixing base.

[0022] Figure 4 A cross-sectional view of an automatic mixer is provided for one embodiment of the present application.

[0023] Figure 5 A cross-sectional view of a rotating shaft and a rotating component in a friction rotating mechanism is provided for one embodiment of the present application.

[0024] Figure 6 A top view of a friction rotation mechanism is provided for one embodiment of the present application.

[0025] Description of reference numerals:

[0026] 10. Automatic mixer; 100. Friction rotating mechanism; 110. Fixed seat; 111. Socket; 112. Mounting hole; 120. Rotating shaft; 120a. Mounting slot; 121. Base; 122. Upper cover; 130. Rotating assembly; 131. Rotating bearing; 132. Rotating clamp; 133. Retaining ring; 140. O-ring; 200. Sample carrier; 300. Eccentric shaft; 400. Rolling ball; 500. Electromagnet; 600. Driving element; 70. Rotation axis. DETAILED DESCRIPTION

[0027] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0028] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or part referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0029] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0030] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, they can refer to fixed connections, removable connections, or integration; mechanical connections, electrical connections; direct connections, indirect connections through an intermediary, and internal connections between two components or interactions between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0031] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0032] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. If an element is considered to be "connected to" another element, it may be directly connected to the other component or there may be a central component. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0033] The present application provides a friction rotation mechanism and an automatic mixer, wherein the automatic mixer includes the friction rotation mechanism. The automatic mixer is used to oscillate and mix liquid experimental samples. The friction rotation mechanism is used to assist in rotation when the experimental samples are oscillated and mixed, so as to increase the reliability and service life of the automatic mixer.

[0034] The structures of the automatic mixer and the friction rotation mechanism of the present application are described below. It is understood that in other embodiments, the friction rotation mechanism of the present application is not limited to being used in automatic mixers, but can also be used in any device that requires eccentric oscillation, without limitation herein.

[0035] See Figure 1 FIG1 shows an automatic mixer 10 according to an embodiment of the present application. The automatic mixer 10 provided by the embodiment of the present application includes a friction rotation mechanism 100 and a sample carrier 200, wherein the sample carrier 200 is used to carry a container such as a test tube for accommodating a liquid experimental sample, such as Figure 2 and Figure 3 As shown, the friction rotation mechanism 100 includes a fixed base 110, on which is provided an eccentric shaft 300 capable of rotating around a rotation axis 70, and the sample carrier 200 is connected to the eccentric shaft 300; the eccentric shaft 300 can rotate around the rotation axis 70 under the drive of an external driving source, so that the sample carrier 200 also rotates eccentrically around the above-mentioned rotation axis 70, so that the sample carrier 200 can eccentrically oscillate the liquid experimental sample, thereby achieving the purpose of mixing the sample.

[0036] Specifically, in one embodiment, Figure 2 and Figure 4 As shown, a socket 111 is provided on the fixing seat 110 of the friction rotating mechanism 100, and as shown in FIG. Figure 5 As shown, the friction rotation mechanism 100 also includes a rotating shaft 120 and a rotating assembly 130, wherein the aperture of the socket 111 is larger than the outer diameter of the rotating shaft 120, so that the rotating shaft 120 can be movably eccentrically accommodated in the socket 111, that is, the central axis of the rotating shaft 120 is eccentrically arranged with the central axis of the socket 111; the sample carrier 200 is connected to the rotating shaft 120 on the side facing the fixed seat 110, and when the sample carrier 200 rotates eccentrically, the rotating shaft 120 can also rotate around the central axis of the socket 111 in the socket 111; the rotating assembly 130 is rotatably sleeved on the rotating shaft 120, and the outer peripheral surface of the rotating assembly 130 is fixedly sleeved with an O-ring 140, combined with Figure 6 As shown, the O-ring 140 is used to frictionally contact the hole wall of the socket 111 when the rotating shaft 120 rotates eccentrically around the central axis of the socket 111, so that the rotating component 130 can simultaneously rotate around its own central axis (i.e., around the central axis of the rotating shaft 120).

[0037] Optionally, the O-ring 140 is made of an elastic material such as rubber, so that the O-ring 140 can undergo recoverable elastic deformation when subjected to external force (for example, when in contact with the wall of the socket 111), thereby appropriately increasing the friction between the O-ring 140 and the wall of the socket 111, making it easier for the friction to drive the rotating assembly 130 to rotate around its own central axis.

[0038] In this way, the effective friction force generated by the O-ring 140 and the wall of the socket 111 can drive the rotating component 130 to rotate around its own central axis at the same time, so that the traditional sliding friction between the friction rotating mechanism 100 and the inner wall of the instrument is transformed into rolling friction, thereby avoiding the wear caused by friction, including rubber wear and dents on the inner wall of the instrument, and reducing the material and cost requirements of the O-ring 140. There is no need to use a highly wear-resistant O-ring 140, which greatly increases the service life of the automatic mixer 10.

[0039] Further, in order to ensure that the sample carrier 200 rotates eccentrically around the rotation axis 70 and avoids the sample carrier 200 from shaking up and down when rotating, please continue to refer to Figure 2 There are multiple sockets 111 on the fixing base 110, all of which are spaced around the rotation axis 70. There are also multiple rotating shafts 120 accordingly, each rotating shaft 120 is inserted into a corresponding socket 111 and can rotate eccentrically around the central axis of the corresponding socket 111 in the corresponding socket 111.

[0040] Furthermore, a plurality of mounting holes 112 are provided on the fixing seat 110, and all the mounting holes 112 and the sockets 111 are alternately spaced around the rotation axis 70. A rolling ball 400 is provided in each mounting hole 112, and the rolling ball 400 is in rolling contact with the hole wall of the mounting hole 112 and the bottom side of the sample carrier 200 to support the sample carrier 200, and further prevent the sample carrier 200 from shaking up and down when the rotation axis 70 rotates eccentrically, thereby preventing the experimental sample from splashing while ensuring that the experimental sample is mixed evenly.

[0041] Figure 2 In the embodiment shown in FIG, the number of the insertion holes 111 and the number of the mounting holes 112 are three, and the three insertion holes 111 and the three mounting holes 112 are evenly and alternately spaced around the rotation axis 70. It is understandable that the number of the insertion holes 111 and the mounting holes 112 is not limited and there is no particular limitation.

[0042] In the specific structure of the rotating shaft 120, as shown in FIG. Figure 5 As shown, the outer circumference of the rotating shaft 120 defines a mounting groove 120a circumferentially surrounding its central axis. The rotating assembly 130 is at least partially accommodated within the mounting groove 120a, thereby conserving radial space on the rotating shaft 120 and eliminating the need to enlarge the diameter of the insertion hole 111. Preferably, gaps are formed between the opposing axial walls of the rotating assembly 130 and the opposing axial walls of the mounting groove 120a. This ensures that the rotating assembly 130 does not come into contact with the opposing walls of the mounting groove 120a when rotating about its central axis, thereby ensuring smoother rotation of the rotating assembly 130.

[0043] More specifically, to ensure installation accuracy, the two opposing axial walls of the rotating assembly 130 are prevented from contacting the opposing axial walls of the mounting slot 120a. The rotating shaft 120 includes a base 121 and a top cover 122. The top cover 122 is removably fastened to the top of the base 121 by screws, and the sample stage 200 is also removably connected to the top of the top cover 122 by screws. The end of the base 121 near the top cover 122 defines a first mounting slot circumferentially around its central axis, while the end of the top cover 122 near the base 121 defines a second mounting slot circumferentially around its central axis. Together, the first and second mounting slots form the mounting slot 120a for accommodating the rotating assembly 130. This allows the installation clearance between the top cover 122 and the base 121 to be controlled by screws based on the axial dimensions of the rotating assembly 130, thereby ensuring the vertical position accuracy of the rotating assembly 130.

[0044] The rotating assembly 130 specifically comprises a rotating bearing 131 and a rotating clamp 132. The rotating bearing 131 is rotatably coaxially sleeved on the rotating shaft 120, the rotating clamp 132 is fixedly coaxially sleeved on the rotating bearing 131, and the O-ring 140 is fixedly coaxially sleeved on the rotating clamp 132. Preferably, the outer circumference of the rotating clamp 132 is provided with a groove surrounding its central axis. The O-ring 140 is embedded in the groove by utilizing its own elasticity, so that the O-ring 140 is firmly fixed to the rotating clamp 132. When the O-ring 140 contacts the wall of the insertion hole 111, the O-ring 140 and the rotating clamp 132 do not slip, thereby effectively driving the rotating clamp 132 and the rotating bearing 131 to rotate together about their central axes, thereby reducing wear on the O-ring 140 or the wall of the insertion hole 111.

[0045] Of course, it is understandable that the rotating assembly 130 can be an integrated structure and is not limited to the structure consisting of the rotating bearing 131 and the rotating clamp 132, and the O-ring 140 can also be integrally connected to the rotating assembly 130, which is not limited here.

[0046] Furthermore, when the rotating clamp 132 is mounted on the rotating bearing 131, it is not necessarily guaranteed that the rotating bearing 131 and the rotating clamp 132 are in close contact. Specifically, it is not necessarily guaranteed that the end face of the rotating bearing 131 in its own axial direction is exactly in close contact with the inner wall of the rotating clamp 132 in its own axial direction. This causes the rotating bearing 131 to float up and down along its own axial direction during rotation, thereby resulting in poor reliability of the rotating assembly 130 during rotation. Therefore, to solve this problem, the rotating assembly 130 also includes a retaining ring 133. The retaining ring 133 is embedded in the gap formed by the rotating bearing 131 in its own axial direction and the inner wall of the rotating clamp 132. One side of the retaining ring 133 abuts one end of the rotating bearing 131 in its own axial direction, and the other side abuts the inner wall of the rotating clamp 132 in its own axial direction.

[0047] In this way, by embedding the retaining ring 133 , the rotating bearing 131 will not float up and down relative to the rotating clamp 132 during rotation, thereby ensuring the reliability of the rotation of the rotating assembly 130 .

[0048] In addition, when the eccentric shaft 300 rotates and drives the sample carrier 200 to rotate eccentrically, in order to stop the sample carrier 200 at a specific position to achieve the positioning of the sample carrier 200, such as Figure 2As shown, the fixed base 110 is also equipped with an electromagnet 500, which is connected to a driving element 600. The driving element 600 can drive the electromagnet 500 to move radially along the eccentric shaft 300. The eccentric shaft 300 is coaxially mounted with a turntable, and the outer periphery of the turntable is provided with a retaining groove. When the sample carrier 200 needs to be positioned, the driving element 600 drives the electromagnet 500 to move radially along the eccentric shaft 300 and engage with the corresponding retaining groove of the turntable, thereby stopping the turntable at a certain rotation angle, thereby stopping the sample carrier 200 at a specific position, ensuring that the sample carrier 200 stops at the same consistent position after each mixing operation.

[0049] It can be seen that the automatic mixer 10 provided in the present application, by setting a rotating component 130 in the friction rotating mechanism 100 of the automatic mixer 10, converts the traditional sliding friction between the friction rotating mechanism 100 and the inner wall of the instrument into rolling friction, thereby avoiding the wear caused by friction, including rubber wear and dents on the inner wall of the instrument, and reducing the material and cost requirements of the O-ring 140, greatly increasing the service life of the automatic mixer 10.

[0050] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A friction rotation mechanism, characterized in that: include: A fixing seat, wherein the fixing seat is provided with a socket; a rotating shaft, received in the socket and eccentrically disposed with respect to a central axis of the socket, the rotating shaft being capable of eccentrically rotating about the central axis of the socket; A rotating assembly is rotatably sleeved on the rotating shaft, and an O-ring is fixedly sleeved on the outer circumference of the rotating assembly. The O-ring is used to frictionally contact the hole wall of the socket when the rotating shaft rotates eccentrically around the central axis of the socket, so that the rotating assembly can simultaneously rotate around its own central axis.

2. The friction rotation mechanism according to claim 1, characterized in that: The outer peripheral surface of the rotating shaft is provided with a mounting groove surrounding the central axis thereof, and the rotating assembly is at least partially accommodated in the mounting groove.

3. The friction rotation mechanism according to claim 2, characterized in that: Gaps are formed correspondingly between two opposite side walls of the rotating assembly in its own axial direction and two opposite groove walls of the installation groove in its own axial direction.

4. The friction rotation mechanism according to claim 2, characterized in that: The rotating shaft includes a base and an upper cover that are connected to each other. The base is provided with a first mounting groove surrounding its own central axis at one end close to the upper cover, and the upper cover is provided with a second mounting groove surrounding its own central axis at one end close to the base. The first mounting groove and the second mounting groove together form the mounting groove.

5. The friction rotation mechanism according to claim 1, characterized in that: The O-ring can undergo recoverable deformation under the action of external force.

6. The friction rotation mechanism according to claim 1, characterized in that: The rotating assembly includes a rotating bearing and a rotating clamp. The rotating bearing is rotatably and coaxially sleeved on the rotating shaft. The rotating clamp is fixedly and coaxially sleeved on the rotating bearing. The O-ring is fixedly and coaxially sleeved on the rotating clamp.

7. The friction rotation mechanism according to claim 6, characterized in that: The rotating assembly also includes a retaining ring, which is embedded in the gap formed by the rotating bearing in its own axial direction and the inner wall of the rotating clamp, and one side of the retaining ring abuts against one end of the rotating bearing in its own axial direction, and the other side abuts against the inner wall of the rotating clamp in its own axial direction.

8. An automatic mixer, characterized in that It comprises a sample carrier and a friction rotation mechanism as described in any one of claims 1 to 7, wherein an eccentric shaft that can rotate around a rotation axis is provided on the fixed seat of the friction rotation mechanism, the sample carrier is connected to the eccentric shaft, and the rotation axis of the friction rotation mechanism is connected to the side of the sample carrier facing the fixed seat.

9. The automatic mixer according to claim 8, characterized in that There are a plurality of the insertion holes, all of which are spaced around the rotation axis. There are correspondingly a plurality of rotation shafts, and each rotation shaft is inserted into a corresponding one of the insertion holes.

10. The automatic mixer according to claim 8, characterized in that A plurality of mounting holes are provided on the fixing seat, and all the mounting holes and the jacks are alternately spaced around the rotation axis. A rolling ball is provided in each mounting hole, and the rolling ball is in rolling contact with the hole wall of the mounting hole and the sample carrier to support the sample carrier.

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