Locating and clamping device of refrigerated centrifuge

Abstract

The utility model provides a refrigerated centrifuge positioning and clamping device, and relates to the technical field of refrigerated centrifuges. The refrigerated centrifuge positioning and clamping device comprises a centrifuge body, a mounting base is rotationally connected to the interior of the centrifuge body, a containing groove is formed in the mounting base, and a fixing sleeve communicated with the containing groove is fixedly connected to the mounting base. According to the device, a test tube is placed in a placement groove, then a driving mechanism drives a plurality of pressing wheels to slide towards the center of the placement groove, the outer surface of the upper portion of the test tube is clamped and fixed through the pressing wheels, and when the test tube is inserted into the placement groove, the outer surface of the upper portion of the test tube is fixed. The outer surface of the lower portion of a test tube is clamped through an elastic clamping piece of a second clamping mechanism, the test tube is prevented from shaking and colliding in the centrifugal process in a bidirectional clamping mode, the test tubes with different diameters can be clamped by controlling the sliding distance value of a sliding rod and under the action of the elastic force of the elastic clamping piece, and the application range is wide.

Description

Technical Field

[0001] The utility model relates to a positioning and clamping device, in particular to a positioning and clamping device for a refrigerated centrifuge, belonging to the technical field of refrigerated centrifuges. Background Technique

[0002] A centrifuge is a machine that uses centrifugal force to accelerate the separation of different materials to be separated. Refrigerated centrifuges are further divided into low-speed, high-speed refrigerated centrifuges, as well as ultra-high-speed analytical and preparative dual-purpose refrigerated centrifuges and other models.

[0003] Chinese Patent Publication No. CN202655128U discloses a medical centrifuge, including a machine shell, a cover plate covering the machine shell, a centrifugal chamber provided on the machine shell, and a control circuit module for controlling the centrifugal chamber. The control circuit module includes a single-chip microcomputer, a speed module, a time module, a driving circuit, and an execution circuit connected to the driving circuit.

[0004] However, the inventor believes that the above device has certain defects. The above device is not convenient for placing test tubes of different specifications. If a test tube with an inappropriate size is placed in the cavity, the test tube is likely to collide with the cavity and be damaged during rotation. Therefore, the utility model provides a positioning and clamping device for a refrigerated centrifuge. Summary of the Utility Model

[0005] (1) Technical Problems to be Solved

[0006] The purpose of the utility model is to provide a positioning and clamping device for a refrigerated centrifuge to solve the above problems, so as to solve the problems in the prior art that it is not convenient to place test tubes of different specifications and the test tubes are likely to collide with the cavity and be damaged during rotation.

[0007] (2) Technical Solutions

[0008] The utility model is realized through the following technical solutions: A positioning and clamping device for a refrigerated centrifuge, including a centrifuge body. An installation seat is rotatably connected inside the centrifuge body. A placement groove is opened on the installation seat. A fixed sleeve communicated with the placement groove is fixedly connected to the installation seat. A first clamping mechanism for clamping the upper part of the test tube is provided on the fixed sleeve. The first clamping mechanism includes a fixed frame fixed on the fixed sleeve. A sliding rod is slidably connected to the fixed frame. One end of the sliding rod is rotatably connected to a pressure wheel. A driving mechanism for driving a plurality of sliding rods to slide towards the center of the placement groove is provided on the fixed sleeve. A second clamping mechanism for clamping the lower part of the test tube is provided inside the placement groove. The second clamping mechanism includes elastic clamping pieces fixed on the inner wall of the installation seat.

[0009] Preferably, the driving mechanism includes a rotating disk rotatably mounted on a fixed sleeve. An extrusion groove is formed on the rotating disk. The other end of the sliding rod is fixedly connected to a connecting sliding rod which slides inside the extrusion groove. By rotating the rotating disk, the extrusion groove squeezes one end of the connecting sliding rod to push a plurality of sliding rods to slide towards the center of the placement groove.

[0010] Preferably, a notch is formed on the outer surface of the rotating disk. A movable stop rod for restricting the rotation of the rotating disk is mounted on the mounting seat. The movable stop rod is arranged inside the notch. By inserting the movable stop rod into the notch, the rotation of the rotating disk is restricted.

[0011] Preferably, one end of the movable stop rod is hinged to the top of the mounting seat through a pin shaft. A torsion spring is sleeved on the pin shaft of the movable stop rod. By rotating the movable stop rod to make it rotate out of the notch, the rotating disk can rotate freely. Under the action of the torsion spring, the movable stop rod always remains in a state of being tightly abutted against the notch.

[0012] Preferably, the number of the elastic clamping pieces is multiple. The multiple elastic clamping pieces are distributed in a circumferential array on the inner wall of the mounting seat. A rubber sleeve is sleeved on the outer surface of the elastic clamping piece. The rubber sleeve is provided to protect the surface of the clamped test tube.

[0013] Preferably, the centrifuge body is hinged with a machine cover through a hinge. A sealing cover is fixedly connected to one side surface of the machine cover. The machine cover and the sealing cover provided are used to isolate the internal environment of the centrifuge body from the outside.

[0014] Preferably, the number of the placement grooves is multiple. A soft pad is fixedly connected to the inner bottom wall of each placement groove. By providing the soft pad, it can protect the bottom of the test tube when it contacts the inner bottom wall of the placement groove.

[0015] The present utility model provides a positioning and clamping device for a refrigerated centrifuge, and its beneficial effects are as follows:

[0016] 1. By placing the test tube inside the placement groove, and then driving a plurality of pressure wheels to slide and approach the center of the placement groove through the driving mechanism, the outer surface of the upper part of the test tube is clamped and fixed by the plurality of pressure wheels. When the test tube is inserted into the placement groove, the elastic clamping pieces of the second clamping mechanism clamp the outer surface of the lower part of the test tube. The two-way clamping method prevents the test tube from shaking and colliding during the centrifugation process. And by controlling the sliding distance value of the sliding rod and the elastic force of the elastic clamping pieces, test tubes with different diameters can be clamped, and the applicable range is wide.

[0017] 2. The device drives the rotating disk to rotate, squeezes one end of the connecting sliding rod through the extrusion groove to push the sliding rod to slide towards the center of the placing groove, so that multiple pressing wheels clamp the test tube. After adjustment, the movable stop rod is inserted into the notch to limit the rotation of the rotating disk, improving the stability during the clamping process. The rubber sleeve and soft pad provided improve the protection effect on the test tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the overall three-dimensional view of the present utility model;

[0019] Figure 2 is the three-dimensional view of the mounting seat of the present utility model;

[0020] Figure 3 is the three-dimensional view of the first clamping mechanism of the present utility model;

[0021] Figure 4 is of the present utility model Figure 3 enlarged schematic view at A;

[0022] Figure 5 is the structural schematic view of the second clamping mechanism of the present utility model.

[0023]

SYMBOLS DESCRIPTION OF MAIN COMPONENTS

[0024] 1. Centrifuge body; 11. Machine cover; 2. Mounting seat; 21. Placing groove; 22. Fixed sleeve; 3. Rotating disk; 31. Extrusion groove; 32. Notch; 4. Fixed frame; 41. Sliding rod; 42. Pressing wheel; 43. Connecting sliding rod; 5. Movable stop rod; 6. Elastic clip. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The embodiment of the present utility model provides a positioning and clamping device for a refrigerated centrifuge.

[0026] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5, a positioning and clamping device for a refrigerated centrifuge, comprising a centrifuge body 1. A machine cover 11 is hinged to the centrifuge body 1 through a hinge. A sealing cover is fixedly connected to one side surface of the machine cover 11. An installation seat 2 is rotatably connected inside the centrifuge body 1. The internal environment of the centrifuge body 1 is isolated from the outside by the provided machine cover 11 and the sealing cover on the machine cover 11. A placement groove 21 is provided on the installation seat 2, and a test tube is placed through the provided placement groove 21. A fixed sleeve 22 communicated with the placement groove 21 is fixedly connected to the installation seat 2. A first clamping mechanism for clamping the upper part of the test tube is provided on the fixed sleeve 22. The first clamping mechanism includes a fixed frame 4 fixed on the fixed sleeve 22. A sliding rod 41 is slidably connected to the fixed frame 4. One end of the sliding rod 41 is rotatably connected to a pressing wheel 42. By controlling the sliding of the sliding rod 41 on the fixed frame 4, the pressing wheels 42 at one ends of multiple sliding rods 41 approach the center of the placement groove 21, and the outer surface of the upper part of the test tube is clamped and fixed by multiple pressing wheels 42.

[0027] Please refer to again Figure 1 , Figure 2 and Figure 3 , a driving mechanism for driving multiple sliding rods 41 to slide towards the center of the placement groove 21 is provided on the fixed sleeve 22. The driving mechanism includes a rotating disk 3 rotatably connected to the fixed sleeve 22. An extrusion groove 31 is provided on the rotating disk 3. The other end of the sliding rod 41 is fixedly connected to a connecting sliding rod 43. The connecting sliding rod 43 slides inside the extrusion groove 31. By driving the rotation of the rotating disk 3 on the fixed sleeve 22, multiple connecting sliding rods 43 are pushed to slide towards the center of the fixed sleeve 22 under the extrusion action of the extrusion groove 31, so that multiple pressing wheels 42 clamp the test tube at the center of the placement groove 21.

[0028] Please refer to again Figure 1 , Figure 2 , Figure 3 and Figure 4 , a notch 32 is provided on the outer surface of the rotating disk 3. A movable stop rod 5 for restricting the rotation of the rotating disk 3 is installed on the installation seat 2. The movable stop rod 5 is arranged inside the notch 32. One end of the movable stop rod 5 is hinged to the top of the installation seat 2 through a pin shaft. A torsion spring is sleeved on the pin shaft of the movable stop rod 5. The rotation of the rotating disk 3 is restricted by turning the movable stop rod 5 into the notch 32, thereby improving the stability during the clamping process. Through the provided torsion spring, the movable stop rod 5 is in a tightly abutted state with the notch 32 when not under force. By turning the movable stop rod 5 into the notch 32, the rotating disk 3 can be rotated.

[0029] Please refer to again Figure 1 , Figure 2 and Figure 5, a second clamping mechanism for clamping the lower part of the test tube is provided inside the placement groove 21. The second clamping mechanism includes elastic clips 6 fixed to the inner wall of the mounting base 2. The number of elastic clips 6 is multiple, and the multiple elastic clips 6 are distributed in a circumferential array on the inner wall of the mounting base 2. When the bottom of the test tube is inserted into the inside of the placement groove 21, the bottom of the elastic clip 6 is expanded outwards by squeezing the elastic clip 6, and then the bottom of the test tube is clamped by the action of the self-elastic force of the elastic clip 6. A rubber sleeve is sleeved on the outer surface of the elastic clip 6. The number of placement grooves 21 is multiple, and a soft pad is fixedly connected to the inner bottom wall of each placement groove 21. The rubber sleeve and the soft pad provided improve the protection effect on the test tube.

[0030] Working principle: Open the machine cover 11 and insert multiple test tubes into the inside of multiple placement grooves 21 respectively. When the bottom of the test tube is inserted into the inside of the placement groove 21, the bottom of the elastic clip 6 is expanded outwards by squeezing the elastic clip 6, and then the bottom of the test tube is clamped by the action of the self-elastic force of the elastic clip 6. Manually drive the movable stop lever 5 to rotate out from the inside of the notch 32 to drive the rotating disk 3 to rotate. Under the extrusion action of the extrusion groove 31, a plurality of connecting slide rods 43 are pushed to slide towards the center of the fixed sleeve 22. Under the connection action of the sliding rod 41, a plurality of pressing wheels 42 clamp the test tube at the center of the placement groove 21 to clamp and fix the upper and lower parts of the test tube bidirectionally. Then, under the action of the torsion spring, the movable stop lever 5 rotates back into the inside of the notch 32 to limit the rotation of the rotating disk 3, improving the stability during the clamping process.

[0031] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art of this industry should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. Refrigerated centrifuge positioning and clamping device, comprising a centrifuge body (1), characterized in that: Inside the centrifuge body (1), there is a rotatably connected mounting seat (2). A placement groove (21) is formed on the mounting seat (2). A fixed sleeve (22) communicating with the placement groove (21) is fixedly connected to the mounting seat (2). A first clamping mechanism for clamping the upper part of the test tube is provided on the fixed sleeve (22). The first clamping mechanism includes a fixed frame (4) fixed on the fixed sleeve (22). A sliding rod (41) is slidably connected to the fixed frame (4). One end of the sliding rod (41) is rotatably connected to a pressing wheel (42). A driving mechanism for driving a plurality of sliding rods (41) to slide towards the center of the placement groove (21) is provided on the fixed sleeve (22). A second clamping mechanism for clamping the lower part of the test tube is provided inside the placement groove (21). The second clamping mechanism includes elastic clamping pieces (6) fixed on the inner wall of the mounting seat (2).

2. The positioning and clamping device of the refrigerated centrifuge according to claim 1, wherein: The driving mechanism includes a rotating disk (3) rotatably mounted on the fixed sleeve (22). An extrusion groove (31) is formed on the rotating disk (3). The other end of the sliding rod (41) is fixedly connected to a connecting sliding rod (43). The connecting sliding rod (43) slides inside the extrusion groove (31).

3. The positioning and clamping device for a refrigerated centrifuge according to claim 2, characterized in that: A notch (32) is formed on the outer surface of the rotating disk (3). A movable stop rod (5) for restricting the rotation of the rotating disk (3) is mounted on the mounting seat (2). The movable stop rod (5) is arranged inside the notch (32).

4. The positioning and clamping device of a refrigerated centrifuge according to claim 3, wherein: One end of the movable stop rod (5) is hinged to the top of the mounting seat (2) through a pin shaft. A torsion spring is sleeved on the pin shaft of the movable stop rod (5).

5. The positioning and clamping device of a refrigerated centrifuge according to claim 1, wherein: The number of the elastic clamping pieces (6) is multiple. The multiple elastic clamping pieces (6) are distributed in a circumferential array on the inner wall of the mounting seat (2). A rubber sleeve is sleeved on the outer surface of the elastic clamping piece (6).

6. The positioning and clamping device of a refrigerated centrifuge according to claim 1, wherein: A machine cover (11) is hinged to the centrifuge body (1) through a hinge. A sealing cover is fixedly connected to one side surface of the machine cover (11).

7. The positioning and clamping device of a refrigerated centrifuge according to claim 1, characterized in that: The number of the placement grooves (21) is multiple. A soft pad is fixedly connected to the inner bottom wall of each placement groove (21).

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