A deformation-preventing buffer support frame suitable for ultra-thin-wall centrifugal tubes

Abstract

The utility model relates to sample detection technical field, concretely relates to a kind of anti-deformation buffer support frame suitable for ultrathin wall centrifugal tube, including support frame and shock absorbing leg;The top of shock absorbing leg is fixedly connected with the lower surface of support frame.The honeycomb reinforcing rib of the utility model significantly improves bending and torsional stiffness while reducing overall weight, suppresses elastic deflection and local instability under load, thereby indirectly reducing the slight deformation of ultrathin wall centrifugal tube, provides stable overall load bearing and positioning matrix for multiple centrifugal tubes, provides effective vibration damping and buffering design, solves the problem of rigid tray, simple foam pad or ordinary plastic support defects, absorbs and dissipates vibration energy by the elastic deformation of spring, has good isolation effect for medium and high frequency vibration, is fixedly connected with the lower surface of support frame, elastically isolates the whole device from external load surface, reduces the impact of transportation, centrifugation or environmental vibration on sample, avoids irreversible deformation and even damage of ultrathin wall tube body.

Description

Technical Field

[0001] This utility model relates to the field of sample testing technology, specifically to a deformation-resistant buffer support frame suitable for ultra-thin-walled centrifuge tubes. Background Technology

[0002] In numerous scientific and industrial fields such as biochemistry, molecular biology, and medical testing, ultrathin-walled centrifuge tubes are widely used in critical experimental operations such as centrifugation, cryopreservation, and reaction mixing of micro-samples due to their extremely thin walls and flexible materials. Their use places extremely high demands on the stability, vibration resistance, and deformation prevention of support and positioning. However, traditional centrifuge tube support devices often use rigid trays, simple foam pads, or ordinary plastic supports, which not only lack effective vibration damping and buffering designs but also struggle to provide stable support for centrifuge tubes under complex conditions such as laboratory transport, high-speed centrifugation, or environmental vibration. This makes them highly susceptible to irreversible deformation or even breakage of the ultrathin-walled tubes due to excessive local stress or high-frequency vibration transmission, severely affecting the accuracy of experimental data and the safety of samples.

[0003] Therefore, it is necessary to invent a deformation-resistant buffer support frame suitable for ultra-thin-walled centrifuge tubes to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a deformation-resistant buffer support frame suitable for ultra-thin-walled centrifuge tubes. The honeycomb reinforcing ribs significantly improve bending and torsional stiffness while reducing overall weight, suppressing elastic deflection and local instability under load, thereby indirectly reducing the minute deformation of ultra-thin-walled centrifuge tubes. It provides a stable overall load-bearing and positioning base for multiple centrifuge tubes, and provides an effective vibration reduction and buffering design. It solves the defects of rigid trays, simple foam pads or ordinary plastic supports. The elastic deformation of the shock-absorbing legs absorbs and dissipates vibration energy, and has a good isolation effect on medium and high frequency vibrations. Compared with pure rubber or damping pads, it is easier to maintain stability under large displacement and periodic loads. It is fixed to the lower surface of the support frame, elastically isolating the entire device from the external load-bearing surface, reducing the impact of transport, centrifugation or environmental vibration on the sample, and avoiding irreversible deformation or even damage to the ultra-thin-walled tubes.

[0005] To achieve the above objectives, the present invention provides the following technical solution: including a support frame and a shock-absorbing leg; characterized in that the top end of the shock-absorbing leg is fixedly connected to the lower surface of the support frame, the support frame is provided with honeycomb-shaped reinforcing ribs, and the reinforcing ribs are provided with tube grooves between them, and the upper surface of the reinforcing ribs is provided with grooves; wherein the cross-section of the groove is semi-circular.

[0006] Preferably, a buffer layer is provided on the inner surface of the tube groove.

[0007] Preferably, a protective cover is provided on the lower surface of the support frame, and the central axis of the protective cover coincides with the central axis of the shock-absorbing leg.

[0008] Preferably, the shock-absorbing leg is a spring shock absorber, and the diameter of the horizontal surface of the spring shock absorber is larger in the middle and smaller at both ends.

[0009] This utility model also provides a buffer support frame, including a base and a spring base plate. The spring base plate is provided on the upper surface of the base. The spring base plate is concave. A spring assembly is provided on the upper surface of the spring base plate. A spring clamp is provided on the upper surface of the spring assembly. The spring clamp has bolt holes. The projected areas of the spring base plate and the spring clamp are the same.

[0010] Preferably, the spring assembly comprises three to five springs, with the springs on both sides being butterfly springs and the springs between the butterfly springs being conical disc springs.

[0011] This utility model also provides a buffer support frame, including a square base and a shock-absorbing spring. The upper surface of the square base is connected to the bottom end of the shock-absorbing spring, and the top end of the shock-absorbing spring is connected to a support disc. The support disc has a reserved through hole, and a connecting column is interference-fitted into the through hole. The support disc also has a reserved guide hole.

[0012] Preferably, the top end of the connecting column is movably connected to the bend of the L-shaped connecting rod, the bottom end of the L-shaped connecting rod is movably connected to the top end of the connecting rod, and the bottom end of the connecting rod is movably connected to the square base; the L-shaped connecting rod is set through the guide hole.

[0013] Preferably, the number of L-shaped connecting rods is the same as the number of shock-absorbing springs; the L-shaped connecting rods are fitted with the guide holes with a clearance fit.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows: (1) Honeycomb reinforcing ribs are arranged inside the support frame to reduce weight while improving overall bending and torsional stiffness, suppressing elastic deflection and local instability of the support frame under load, thereby indirectly reducing the small deformation of the centrifuge tube.

[0015] (2) The shock-absorbing legs are spring shock absorbers, which absorb and dissipate vibration energy through the elastic deformation of the spring, and have a good isolation effect, especially for medium and high frequency vibrations. Compared with pure rubber or damping pads, they are more conducive to maintaining stability under large displacement and periodic loads. The horizontal diameter of the spring shock absorber is larger in the middle and smaller at both ends. The side of the spring forms a "spindle-shaped" cross section. This design brings the following engineering benefits: increasing the effective number of coils and vertical stiffness under the same material and height, while reducing stress concentration at the ends; increasing the circumferential area of ​​the spring material contact, improving the force distribution, and suppressing lateral buckling and tilting; elastically isolating the entire device from the external bearing surface, reducing the impact of transport, centrifugation or environmental vibration on the sample, and avoiding irreversible deformation or even breakage of the ultrathin-walled tube. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a perspective view of Embodiment 1 of the present utility model; Figure 2 This utility model Figure 1 Enlarged view of point A in the middle; Figure 3 This is a side view of Embodiment 1 of the present utility model; Figure 4 This is a top view of Embodiment 1 of the present invention; Figure 5 This is a perspective view of Embodiment 2 of the present invention; Figure 6 This is a top view of Embodiment 2 of the present invention; Figure 7 This is a perspective view of Embodiment 3 of the present invention; Figure 8 This is a top view of Embodiment 3 of the present invention; Explanation of reference numerals in the attached figures: 100. Support frame; 200. Shock-absorbing leg; 300. Reinforcing rib; 400. Pipe groove; 500. Groove; 600. Protective cover; 1001. Base; 1002. Spring base plate; 1003. Spring assembly; 1004. Spring clamp plate; 2001. Square base; 2002. Shock-absorbing spring; 2003. Support disc; 2004. Through hole; 2005. Connecting column; 2006. Guide hole; 2007. L-shaped connecting rod; 2008. Connecting rod. Detailed Implementation

[0018] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0019] Example 1: This utility model provides the following... Figure 1-4 The diagram shows a deformation-resistant buffer support frame suitable for ultra-thin-walled centrifuge tubes, comprising a support frame 100 and shock-absorbing legs 200. The top of the shock-absorbing legs 200 is fixedly connected to the lower surface of the support frame 100, and the shock-absorbing legs 200 are connected to the lower surface of the support frame 100, elastically isolating the entire support frame 100 from the external bearing surface (such as a laboratory bench or centrifuge turntable), absorbing and attenuating the impact and high-frequency vibration from transport, centrifugation or vibration, protecting the centrifuge tubes and samples, and providing stable support for the centrifuge tubes under complex working conditions such as transport on the laboratory bench, high-speed centrifugation or environmental vibration.

[0020] The support frame 100 is internally equipped with honeycomb-shaped reinforcing ribs 300. The support frame 100 serves as the base for overall load-bearing and positioning, supporting and positioning multiple ultra-thin-walled centrifuge tubes. The honeycomb-shaped reinforcing ribs 300, arranged inside the support frame 100, reduce weight while increasing overall bending and torsional stiffness, suppressing elastic deflection and local instability of the support frame 100 under load. Thus, the honeycomb-shaped reinforcing ribs 300 indirectly reduce the minute deformation of the centrifuge tubes.

[0021] A pipe groove 400 is provided between the reinforcing ribs 300, and a groove 500 is provided on the upper surface of the reinforcing ribs 300; wherein, the cross-section of the pipe groove 400 is semi-circular.

[0022] The tube groove 400 is set between the reinforcing ribs 300 to independently limit and guide each centrifuge tube, preventing contact, collision and cross-movement between multiple tubes side by side; reducing point pressure concentration and improving positioning accuracy and stability.

[0023] The groove 500 (located on the upper surface of the reinforcing rib 300) serves to distribute the stress on the reinforcing rib 300 and reduce local stress concentration. In other words, it optimizes the stress distribution.

[0024] A buffer layer is installed on the inner surface of the tube 400. This buffer layer is made of EPDM (ethylene propylene diene monomer) rubber, which possesses good resilience and weather resistance, exhibits good resistance to water, weak acids and alkalis, and common alcohols, and has low compression set, facilitating repeated load-bearing. Furthermore, the EPDM rubber is preferably formulated with a hardness in the Shore A range of 50–60 to balance the effects of "support without collapse" and "preventing pinching damage to thin walls." The buffer layer is in direct contact with the outer wall of the centrifuge tube, further absorbing micro-vibrations and impacts, reducing the risk of friction and scratches, and compensating for the dimensional difference between the tube 400 and the tube wall through a certain degree of compression deformation.

[0025] A protective cover 600 is installed on the lower surface of the support frame 100. The central axis of the protective cover 600 coincides with the central axis of the shock absorber leg 200. The design of the coincident central axis ensures the alignment of force and movement, reduces local stress concentration and lateral friction caused by off-center load, and makes the extension and contraction of the shock absorber leg 200 stable in the axial direction, thereby improving the shock absorption efficiency and service life. The protective cover 600 surrounds the upper half of the outer perimeter of the shock absorber leg 200 to prevent droplets, powder or debris that may fall from above from entering the shock absorption structure, avoiding contamination or corrosion, and to a certain extent limiting the sway of the shock absorber leg 200 when subjected to lateral impact.

[0026] The shock-absorbing leg 200 is a spring shock absorber, which absorbs and dissipates vibration energy through the elastic deformation of the spring, and has a good isolation effect, especially for medium and high frequency vibrations; compared with pure rubber or damping pads, it is more conducive to maintaining stability under large displacement and periodic loads.

[0027] The spring of the spring damper has a horizontal diameter that is larger in the middle and smaller at both ends. The side of the spring forms a "spindle-shaped" cross-section. This design brings the following engineering benefits: it increases the effective number of coils and vertical stiffness with the same material and height, while reducing stress concentration at the ends; it increases the circumferential area of ​​the spring material contact, improves the stress distribution, and suppresses lateral buckling and tilting; it helps to control the natural frequency and stroke utilization, and balances vibration isolation and stability in a limited space. Example 2: As Figure 5-6 As shown, the difference between this embodiment and embodiment 1 is that this embodiment provides a buffer support frame, including a base 1001 and a spring base plate 1002. The spring base plate 1002 is provided on the upper surface of the base 1001, serving as the mounting base and load inlet of the entire support frame 100. It is connected to the equipment foundation or frame and bears and transmits static loads and impact loads from above.

[0028] The spring base plate 1002 is concave, and a spring assembly 1003 is mounted on its upper surface. A spring clamping plate 1004 is mounted on the upper surface of the spring assembly 1003. The spring base plate 1002 is located above the base 1001 and serves as the bearing surface and load distribution plate for the spring assembly 1003, distributing concentrated loads more evenly to each spring. The spring clamping plate 1004 has pre-drilled bolt holes. The projected areas of the spring base plate 1002 and the spring clamping plate 1004 are the same. The spring clamping plate 1004 is mounted on the upper surface of the spring assembly 1003 and is used for axial positioning of the springs and restraining lateral buckling.

[0029] The spring base plate 1002 has a concave shape, which facilitates its cooperation with limiting structures (such as guide posts and limiting seats). At the same time, the spring base plate 1002 provides lateral limiting and anti-instability boundaries for the spring. The spring assembly 1003 contains three to five sets of springs, preferably three sets. The springs on both sides of the spring assembly 1003 are butterfly springs, and the springs between the butterfly springs are conical disc springs. The spring assembly 1003 is the core of energy absorption and force adjustment for the buffer function. The working stiffness and natural frequency can be set by pre-compression to reduce the peak impact and vibration transmission. The use of butterfly springs on both sides and conical disc springs in the middle forms a layout of "lateral constraint at both ends + main load-bearing in the middle". That is, the butterfly springs on both sides can provide a large preload and a certain displacement compensation, while the conical disc springs have high load-bearing capacity and short stroke, making them suitable for bearing large loads and impacts.

[0030] This combination is beneficial for achieving graded stiffness and variable stiffness characteristics: during small deformations, the end disc springs and the middle conical disc spring work together to achieve relatively high stiffness to suppress micro-vibrations; during large deformations, the middle conical disc spring dominates, providing high load-bearing capacity and energy absorption, while taking into account impact resistance and stability; the above scheme provides an effective vibration reduction and buffer design.

[0031] In addition, the spring base plate 1002 and the spring clamp plate 1004 have the same projected area. This design makes the load path more "straight": the weight and dynamic force of the upper equipment (which can be laboratory equipment or centrifuge tube rack) are transmitted approximately vertically through the spring clamp plate 1004 → spring group 1003 → spring base plate 1002 → base 1001, reducing the bending moment and shear force caused by eccentricity and reducing the risk of local stress concentration and tilting.

[0032] The other design schemes in this embodiment are the same as those in Embodiment 1.

[0033] Example 3: As Figure 7-8 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment provides a buffer support frame, including a square base 2001 and a shock-absorbing spring 2002. The square base 2001 serves as the load-bearing base 1001 and mounting surface of the entire support frame 100, used for fixing to the foundation or frame, and bearing and dispersing vertical loads and lateral forces from above. It provides positioning references and arrangement space for other components (such as the shock-absorbing spring 2002, connecting rod 2008, and guide hole 2006), which is beneficial for force symmetry and structural stability. The upper surface of the square base 2001 is connected to the bottom end of the shock-absorbing spring 2002, and the top end of the shock-absorbing spring 2002 is connected to the support disc 2003. As an elastic element, it undergoes elastic deformation under load to absorb and dissipate vibration or impact energy and reduce the dynamic load transmitted to the upper structure.

[0034] As an upper load-bearing and force-transmitting platform, it evenly transmits the weight and dynamic force of the upper equipment or structure to the shock-absorbing spring 2002 and returns the spring reaction force to the base.

[0035] The through hole 2004 and guide hole 2006 provided on it are used to pass through and constrain key moving parts (connecting column 2005 and L-shaped connecting rod 2007) to realize the two major functions of vertical bearing and guiding and limiting.

[0036] The support disc 2003 has a through hole 2004, and a connecting post 2005 is installed through the through hole 2004 (specifically, the connecting post 2005 is interference-fitted into the through hole 2004, and the through hole 2004 and the connecting post 2005 are fixedly connected); the through hole 2004 provides a force connection channel for the connecting post 2005, so that the connecting post 2005 can pass through vertically and connect with the L-shaped connecting rod 2007 to form a force flow channel.

[0037] The support disc 2003 has a reserved guide hole 2006; it provides linear guidance and displacement constraint for the L-shaped connecting rod 2007, restricts its undesirable lateral / rotational degrees of freedom, and makes the motion follow the set path, thereby improving the stability and controllability of the mechanism; the fit form (specifically clearance fit) with the L-shaped connecting rod 2007 together determines the motion clearance, friction characteristics and stroke boundary.

[0038] The top of the connecting column 2005 is movably connected (specifically, hinged) to the bend of the L-shaped connecting rod 2007, converting the vertical displacement from the upper part into the planar motion of the L-shaped rod, and at the same time serving as a motion hinge point to release the bending moment and reduce local stress concentration.

[0039] The bottom end of the L-shaped connecting rod 2007 is movably connected to the top end of the connecting rod 2008, which continues to transmit and decompose the planar motion of the L-shaped rod into the swing of the connecting rod 2008, thereby achieving kinematic decoupling and avoiding jamming caused by single-point over-constraint.

[0040] The bottom end of the connecting rod 2008 is movably connected to the square base 2001; this design forms a closed-loop kinematic chain, which constrains lateral offset during the compression stroke, guides the spring to be compressed and centered, and limits the maximum stroke of the connecting rod 2008. The L-shaped connecting rod 2007 is set by penetrating the guide hole 2006; the "hole-rod" cooperation realizes guidance and limitation, suppresses the lateral deflection and torsion of the L-shaped rod under load, and improves the straightness and anti-eccentric load capacity of the mechanism.

[0041] The number of L-shaped connecting rods 2007 is the same as the number of shock-absorbing springs 2002; this corresponding design scheme is conducive to uniform load distribution and improved torsional stiffness; the uniform arrangement can significantly reduce local stress and uneven stroke caused by off-center loading.

[0042] The L-shaped connecting rod 2007 is fitted with the guide hole 2006 with a clearance fit. This design is used to accommodate assembly errors and reduce friction. The above design provides effective vibration reduction and buffering.

[0043] The shape and size of the spring assembly 1003 in the attached figure are for illustrative purposes only, and those skilled in the art can adjust them according to actual conditions.

[0044] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A deformation-resistant buffer support frame suitable for ultra-thin-walled centrifuge tubes, comprising a support frame and shock-absorbing legs; characterized in that, The top of the shock-absorbing leg is fixedly connected to the lower surface of the support frame. The support frame is provided with honeycomb-shaped reinforcing ribs, and the reinforcing ribs are provided with tube grooves. The upper surface of the reinforcing ribs is provided with grooves; wherein the cross-section of the groove is semi-circular.

2. The anti-deformation buffer support frame for ultra-thin-walled centrifuge tubes as described in claim 1, characterized in that, A buffer layer is provided on the inner surface of the tube groove.

3. The anti-deformation buffer support frame for ultra-thin-walled centrifuge tubes as described in claim 1, characterized in that, A protective cover is provided on the lower surface of the support frame, and the central axis of the protective cover coincides with the central axis of the shock-absorbing leg.

4. The anti-deformation buffer support frame for ultra-thin-walled centrifuge tubes as described in claim 3, characterized in that, The shock-absorbing leg is a spring shock absorber, and the diameter of the horizontal surface of the spring shock absorber is larger in the middle and smaller at both ends.

5. A buffer support frame, characterized in that, It includes a base and a spring base plate. The spring base plate is provided on the upper surface of the base. The spring base plate is concave. A spring assembly is provided on the upper surface of the spring base plate. A spring clamping plate is provided on the upper surface of the spring assembly. The spring clamping plate has pre-drilled bolt holes. The projected areas of the spring base plate and the spring clamping plate are the same.

6. The buffer support frame as described in claim 5, characterized in that, The spring assembly comprises three to five springs, with the springs on both sides being butterfly springs and the springs between the butterfly springs being conical disc springs.

7. A buffer support frame, characterized in that, It includes a square base and a shock-absorbing spring. The upper surface of the square base is connected to the bottom end of the shock-absorbing spring, and the top end of the shock-absorbing spring is connected to a support disc. The support disc has a through hole, and a connecting post is interference-fitted into the through hole. The support disc also has a guide hole.

8. The buffer support frame as described in claim 7, characterized in that, The top end of the connecting column is movably connected to the bend of the L-shaped connecting rod, the bottom end of the L-shaped connecting rod is movably connected to the top end of the connecting rod, and the bottom end of the connecting rod is movably connected to the square base; the L-shaped connecting rod is set through the guide hole.

9. The buffer support frame as described in claim 8, characterized in that, The number of L-shaped connecting rods is the same as the number of shock-absorbing springs; the L-shaped connecting rods are fitted with the guide holes with clearance.

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