Six-degree-of-freedom overweight test seat

Abstract

The invention relates to a six-degree-of-freedom overweight test seat. The six-degree-of-freedom overweight test seat comprises a telescopic arm, an angle position conversion mechanism and an animal fixing part, the first end of the telescopic arm is fixed on a centrifugal machine, the second end of the telescopic arm is connected with the angle position changing mechanism, and the animal fixing part is fixed on the angle position changing mechanism; the angle position changing mechanism comprises an outer frame fixed to the second end of the telescopic arm, an inner frame arranged on the inner side of the outer frame and a circular plate arranged on the inner side of the inner frame. The animal fixing part is rotatably fixed at the circle center of the circular plate; the two sides of the inner frame in the first direction are connected with the outer frame through bearings respectively. The two sides, in the second direction, of the inner frame are connected with the two ends of the circular plate through bearings correspondingly. The first direction intersects with the second direction. The animal fixing piece, the circular plate and the inner frame can rotate around corresponding shafts respectively, and the experimental animal can be in different load working conditions through angle adjustment.

Description

Technical Field

[0001] The present invention belongs to the field of biomedical engineering and experimental equipment, and particularly relates to a six-degree-of-freedom overweight test seat. Background Art

[0002] In biomedical research, overweight injury experiments are an important means to simulate extreme gravity environments, and have important applications especially in fields such as aerospace medicine, exercise physiology, and trauma medicine. Centrifuges, as overweight simulation devices, are widely used, and experimental rabbits are widely used because of their physiological similarity to humans. However, existing centrifuge equipment usually can only provide a single acceleration overload direction, such as chest-backward or head-pelvis direction, while the actual overweight environment involves accelerations in multiple directions, and the accelerations in different directions have different effects on organisms, and the structures and organs of organisms also have different responses to overloads in different directions. Therefore, multi-directional overload experiments are of great significance. Currently, there are many limitations in equipment for simulating multi-directional overloads. Researchers need to prepare different seats to adapt to different acceleration directions, and the seat needs to be disassembled and assembled each time an experiment is carried out, which is time-consuming and increases the complexity and uncertainty of the experiment. At the same time, equipment limitations make the experiment can only be carried out at several preset specific angles, and continuous angle adjustment cannot be achieved, which limits the depth and breadth of research. As the basic equipment for overweight injury research, the seat of the centrifuge still has room for further improvement.

[0003] In summary, the existing centrifuge seats have the following problems: First, one type of seat of the existing centrifuge can only perform single-direction overweight overload, and different-direction overloads require switching different seats, lacking versatility; Second, the existing centrifuge seats can only perform overloads in specific directions, and cannot achieve overloads in any angular direction. The working conditions are single and cannot meet the needs of various experiments; Third, there is a lack of targeted fixing devices, and additional fixing is required and the fixing effect is not good.

[0004] Aiming at the problem that the structure of the existing centrifuge cannot meet the experimental requirements, the following patents have proposed some improvement measures. "A Telescopic Multifunctional Centrifuge Bracket Structure" (application number CN201410851688.4) designs a special structure telescopic frame to achieve different accelerations by changing the rotation radius, but cannot achieve the adjustment of different overload angles; "Acceleration Test Specimen Fixing Device" (application number 202311660228.9) achieves good fixation of the test specimen by improving the structure, but cannot achieve the switching of different acceleration working conditions and the working conditions are single.

[0005] To solve the above problems, it is necessary to design a new type of centrifuge seat that can meet the experimental requirements. Summary of the Invention

[0006] The object of the present invention is to solve the problems that the existing centrifuge seats can only perform single-direction overweight overload and lack targeted fixing devices.

[0007] The object of the present invention is achieved by the following technical solutions:

[0008] A six-degree-of-freedom overweight test seat, comprising: a telescopic arm, an angular position transformation mechanism, and an animal fixing member; the first end of the telescopic arm is fixed on a centrifuge, the second end is connected to the angular position transformation mechanism, and the animal fixing member is fixed on the angular position transformation mechanism;

[0009] The angular position transformation mechanism includes an outer frame fixed to the second end of the telescopic arm, an inner frame disposed inside the outer frame, and a circular plate disposed inside the inner frame;

[0010] The animal fixing member is rotatably fixed at the center of the circular plate;

[0011] Both sides of the inner frame in the first direction are respectively connected to the outer frame by bearings;

[0012] Both sides of the inner frame in the second direction are respectively connected to both ends of the circular plate by bearings;

[0013] The first direction intersects the second direction.

[0014] Further, the telescopic arm includes a centrifuge connection end connecting to the centrifuge, an extension rod, a hollow receiving rod, and an L-shaped connection end connecting to the angular position transformation mechanism; the first end of the extension rod is connected to the centrifuge connection end, the second end of the extension rod extends into the first end of the hollow receiving rod, and the second end of the hollow receiving rod is connected to the L-shaped connection end.

[0015] Further, the telescopic arm further includes an inner locking sleeve with an external thread and an outer locking sleeve with an internal thread that are sleeved, one end of the inner locking sleeve has a constriction structure, and the extension rod and the hollow receiving rod form a telescopic rod structure.

[0016] Further, the second end of the hollow receiving rod is fixedly connected to the inner locking sleeve, and the outer locking sleeve is sleeved on the inner locking sleeve to cooperate to fix the position of the extension rod.

[0017] Further, the angular position transformation mechanism further includes a U-shaped frame for supporting and moving the outer frame, the U-shaped frame includes two parallel U-shaped support frames and two support rods connecting the ends of the support frames, the outer frame is fixed on the plane formed by the support frames, and the L-shaped connection end is fixed on the support rods.

[0018] Further, the outer frame is provided with I-shaped grooves on both sides not connected to the inner frame, locking sliders are connected to the I-shaped grooves, and the outer frame is movably connected to the support frame through the locking sliders.

[0019] Furthermore, a chute is provided on the support rod, and the L-shaped connection end is movably fixed on the chute.

[0020] Furthermore, the animal fixing member includes: a fixing cage, a fixing back plate, a quick buckle, and a hinge; the fixing back plate is fixed on the circular plate, one side of the fixing cage is fixedly connected to the fixing back plate through a hinge, and the other side is movably connected to the fixing back plate through a quick buckle.

[0021] Furthermore, a fixing structure mounting hole is provided at the center of the circle of the circular plate, and the fixing back plate is mounted on the circular plate through the fixing structure mounting hole.

[0022] Furthermore, the fixing cage can be in a semi-cylindrical shape or a square box, and the specific shape is selected according to the animal body type.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] The six-degree-of-freedom overweight test seat of the present invention has six degrees of freedom, namely the translational degrees of freedom of an object along the three rectangular coordinate axes of x, y, and z and the rotational degrees of freedom around these three coordinate axes. Specifically, the animal fixing member, the circular plate, and the inner frame can respectively rotate around their corresponding axes. Taking the horizontally placed seat as the origin, the animal fixing member rotates around the axis perpendicular to the center of the circular plate to achieve rotation in the y-axis direction, the circular plate rotates around the connecting axis with the inner frame to achieve rotation in the z-axis direction, and the inner frame rotates around the connecting axis with the outer frame to achieve rotation in the x-axis direction, capable of realizing continuous adjustment of 360° for three degrees of freedom; at the same time, the outer frame moves along the U-shaped frame to achieve translation in the x-axis direction, the U-shaped frame moves along the telescopic arm to achieve translation in the z-axis direction, and the telescopic arm realizes translation in the y-axis direction through telescoping, achieving continuous adjustment of displacement for three degrees of freedom within the seat limit range, and altogether having the function of six-degree-of-freedom adjustment, thereby enabling experimental animals to be in different load conditions.

[0025] The six-degree-of-freedom overweight test seat of the present invention can continuously change its position and angle within a limited range without segmented adjustment, has the ability of stepless adjustment, and can realize various acceleration overload modes.

[0026] The six-degree-of-freedom overweight test seat of the present invention is designed with a fixing device for experimental animals. Compared with the traditional seat binding method, the binding and disassembly operations of this seat are simpler and the binding effect is better.

[0027] The six-degree-of-freedom overweight test seat of the present invention adopts a modular design, which is convenient for adapting to various centrifuge fixing interfaces, is applicable to a variety of experimental animals (such as rabbits, rats, etc.), reduces the cost and time of replacing the seat, and has better versatility. Description of the Drawings

[0028] Figure 1 Schematic diagram of the overall structure of the six-degree-of-freedom overweight test seat of the present invention;

[0029] Figure 2 Schematic diagram of the telescopic arm structure of the six-degree-of-freedom overweight test seat of the present invention;

[0030] Figure 3 Schematic diagram of the angular position transformation mechanism of the six-degree-of-freedom overweight test seat of the present invention;

[0031] Figure 4 Schematic diagram of the animal fixing part of the six-degree-of-freedom overweight test seat of the present invention (rabbit tooling);

[0032] Figure 5 Schematic diagram of the animal fixing part of the six-degree-of-freedom overweight test seat of the present invention (rat tooling);

[0033] Figure 6 Schematic diagram of the inner locking sleeve of the six-degree-of-freedom overweight test seat of the present invention;

[0034] Figure 7 Schematic diagram of the outer locking sleeve of the six-degree-of-freedom overweight test seat of the present invention;

[0035] Figure 8 Schematic diagram of the deformed state of the six-degree-of-freedom overweight test seat of the present invention;

[0036] Figure 9 Effect picture of rabbit restraint of the six-degree-of-freedom overweight test seat of the present invention;

[0037] Figure 10 Assembly schematic diagram of the six-degree-of-freedom overweight test seat of the present invention;

[0038] Among them, 1. Telescopic arm; 101. Hollow storage rod; 102. L-shaped connection end; 103. Extension rod; 104. Centrifuge connection end; 105. Inner locking sleeve; 106. Outer locking sleeve; 2. U-shaped frame; 201. Support frame; 202. Support rod; 3. Locking slider; 4. Outer frame; 5. Inner frame; 6. Circular plate; 7. Animal fixing part; 701. Fixed cage; 702. Fixed back plate; 703. Quick buckle; 704. Hinge; 8. Fixed structure mounting hole; 9. Chute; 10. I-shaped groove; 11. Experimental rabbit. Detailed implementation manners

[0039] The present invention will be further described below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] As Figures 1 to 10As shown in the figure, the present invention provides a six-degree-of-freedom overweight experimental seat, which includes a telescopic arm 1, an angular position transformation mechanism, and an animal fixing member 7. The first end of the telescopic arm 1 is fixed on a centrifuge, and the second end is connected to the angular position transformation mechanism. The animal fixing member 7 is fixed on the angular position transformation mechanism.

[0041] The angular position transformation mechanism includes an outer frame 4 fixed to the second end of the telescopic arm 1, an inner frame 5 disposed inside the outer frame 4, and a circular plate 6 disposed inside the inner frame 5. The animal fixing member 7 is rotatably fixed at the center of the circular plate 6. The two sides of the inner frame 5 in the first direction are respectively connected to the outer frame 4 by bearings. The two sides of the inner frame 5 in the second direction are respectively connected to the two ends of the circular plate 6 by bearings. The first direction intersects with the second direction.

[0042] As a specific implementation manner of this embodiment, the first direction is perpendicular to the second direction. A cushion ring is provided on one side of the animal fixing member 7 in contact with the circular plate 6, and the other side is locked and fixed by a quick-release nut. The circular plate 6 is connected to the inner frame 5 by a shaft passing through the center. A cushion ring is provided on the side close to the circular plate 6 at the connection, for buffering and fixing, and the other side is locked and fixed by a quick-release nut, facilitating angle transformation. The two sides of the inner frame 5 not connected to the circular plate 6 are connected to the outer frame 4 by a threaded shaft. A cushion ring is provided on the side close to the inner frame 5 at the connection, and the other side is locked and fixed by a quick-release nut. As Figure 1 、 Figure 3 shown.

[0043] As Figure 2 shown, the telescopic arm 1 includes a centrifuge connection end 104 connected to the centrifuge, an extension rod 103, a hollow receiving rod 101, and an L-shaped connection end 102 connected to the angular position transformation mechanism. The first end of the extension rod 103 is connected to the centrifuge connection end 102, the second end of the extension rod 103 extends into the first end of the hollow receiving rod 101, and the second end of the hollow receiving rod 101 is connected to the L-shaped connection end 102.

[0044] As a preferred implementation manner of the present invention, as Figure 2 、 6 、7 shown, the telescopic arm 1 further includes an inner locking sleeve 105 with an external thread and an outer locking sleeve 106 with an internal thread that are sleeved. One end of the inner locking sleeve 105 sleeved with the outer locking sleeve 106 has a converging structure. The outer locking sleeve 106 is a hollow frustum, and the end sleeved with the inner locking sleeve 105 is the bottom surface. The extension rod 103 and the hollow receiving rod 101 form a telescopic rod structure.

[0045] The second end of the hollow storage rod 101 is fixedly connected to the inner locking sleeve 105, and the outer locking sleeve 106 is sleeved on the inner locking sleeve 105 to fix the position of the extension rod 103 in cooperation.

[0046] As a specific implementation manner of this embodiment, the L-shaped connection end 102 is welded with the hollow storage rod 101. The other end of the hollow storage rod 101 is fixed to the inner locking sleeve 105. The inner locking sleeve 105 and the outer locking sleeve 106 can be converged into a cone shape in cooperation to fix the position of the extension rod 103. The other end of the extension rod 103 is welded with a centrifuge connection end 104.

[0047] As a preferred implementation manner of the present invention, as Figure 1 and Figure 3 shown, the position and angle transformation structure further includes a U-shaped frame 2 for supporting and moving the outer frame 4. The U-shaped frame 2 includes two parallel U-shaped support frames 201 and two support rods 202 connecting the ends of the support frames 201. The outer frame 4 is fixed on the plane formed by the support frames 201, and the L-shaped connection end 102 is fixed on the support rods 202.

[0048] The outer frame 4 is provided with I-shaped grooves 10 on two sides not connected to the inner frame 5. Locking sliders 3 are connected to the I-shaped grooves 10, and the outer frame 4 is fixedly connected to the support frame 201 through the locking sliders 3. Specifically, screw holes for installing the locking sliders 3 are provided on the U-shaped support frames 201 of the U-shaped frame 2, and the locking sliders 3 are fixed on the support frames 201 of the U-shaped frame 2 through the screw holes.

[0049] As a preferred implementation manner of the present invention, a chute 9 is provided on the support rod 202, and the L-shaped connection end 102 is movably fixed on the chute 9 and connected to the U-shaped frame 2. In this embodiment, the L-shaped connection end 102 is movably fixed on the chute 9 through a hexagonal nut.

[0050] The animal fixing member 7 includes: a fixing cage 701, a fixing back plate 702, a quick buckle 703, and a hinge 704; the fixing back plate 702 is fixed on the circular plate 6, one side of the fixing cage 701 is fixedly connected to the fixing back plate 702 through the hinge 704, and the other side is movably connected to the fixing back plate 702 through the quick buckle 703.

[0051] As Figure 8 shown, a fixing structure mounting hole 8 is opened at the center of the circular plate 6, and the fixing back plate 702 is mounted on the circular plate 6 through the fixing structure mounting hole 8.

[0052] In one embodiment, the fixed shroud 701 is semi-cylindrical, with holes for placing the test quadruped and its head and tail, and is suitable for animal subjects that are relatively large in size and have four limbs, a head, and a tail, such as rabbits.

[0053] In another embodiment, the fixed shroud 701 is a square box, which is suitable for smaller subjects. The size and quantity of the box body can be determined according to the size of the subject. For example, for smaller rats, multiple square boxes can be equipped for batch experiments.

[0054] The cooperation effect of the six-degree-of-freedom overweight test seat described in this embodiment with the centrifuge is as Figure 10 shown.

[0055] Taking an experimental rabbit as an example, the working mode of the six-degree-of-freedom overweight test seat is described as follows:

[0056] S1. Install the telescopic arm: Loosen the outer locking sleeve 106, adjust the extension rod 103 to an appropriate position, then tighten the outer locking sleeve 106 to fix the position of the extension rod 103, and then connect the centrifuge connection end 104 to the centrifuge.

[0057] S2. Install the angular position transformation mechanism: Fix the U-shaped frame of the angular position transformation mechanism to the telescopic arm 1, adjust the position of the angular position transformation mechanism up and down along the chute 9 to an appropriate position, and then fix it with a hexagon nut.

[0058] S3. Fix the subject and install the animal fixing part: Open the quick buckle 703, put the experimental rabbit 11 in, then close the fixed shroud 701 and close the buckle 703; then connect the fixed back plate 702 to the fixed structure mounting hole 8, and rotate it around the fixed structure mounting hole 10 to an appropriate position and then fix it with a quick-release nut.

[0059] S4. Position and angle adjustment: Rotate the handle of the locking slider 3 to release the position locking state between the locking slider 3 and the I-shaped groove 10, move the outer frame 4 along the locking slider 3 to an appropriate position, and rotate the handle of the locking slider 3 to lock the position; Loosen the quick-release nut connecting the outer frame 4 and the inner frame 5, rotate the inner frame 5 to an appropriate position and then tighten the quick-release nut; Loosen the quick-release nut connecting the inner frame 5 and the circular plate 6, rotate the circular plate 6 to an appropriate position and then tighten the quick-release nut.

[0060] S5. Replace the subject: When replacing the experimental rabbit, unscrew the quick-release nut on the fixed back plate 702 to remove the animal fixing part 7, perform animal replacement, and repeat the adjustment steps to change the position and angle.

[0061] S6. When ending the experiment, unscrew the quick-release nut on the fixed backplane 702, remove the animal fixing member 7, take out the experimental rabbit 11, selectively disassemble the angular position transformation mechanism and the telescopic arm 1 as needed, and properly store each component for subsequent use. When replacing the test subject or ending the experiment, ensure the safety of the experimental animal and the operator, and perform disassembly and cleaning according to the standard operation procedure.

[0062] The above are only embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A six-degree-of-freedom overweight test seat, characterized in that: include: A telescopic arm (1), an angle position changing mechanism, and an animal fixing member (7); the first end of the telescopic arm (1) is fixed to the centrifuge, the second end is connected to the angle position changing mechanism, and the animal fixing member (7) is fixed to the angle position changing mechanism; The angle position changing mechanism comprises an outer frame (4) fixed to the second end of the telescopic arm (1), an inner frame (5) arranged inside the outer frame (4), and a circular plate (6) arranged inside the inner frame (5); The bearing of the animal fixing member (7) is fixed at the center of the circular plate (6); Both sides of the inner frame (5) in the first direction are respectively connected to the outer frame (4) by bearings; The two sides of the inner frame (5) in the second direction are respectively connected to the bearings at both ends of the circular plate (6); The first direction intersects with the second direction.

2. The six-degree-of-freedom overweight test seat according to claim 1, characterized in that: The telescopic arm (1) comprises a centrifuge connecting end (104) connected to a centrifuge, an extension rod (103), a hollow storage rod (101), and an L-shaped connecting end (102) connected to the angle position conversion mechanism; the first end of the extension rod (103) is connected to the centrifuge connecting end (102), the second end of the extension rod (103) extends into the first end of the hollow storage rod (101), and the second end of the hollow storage rod (101) is connected to the L-shaped connecting end (102).

3. The six-degree-of-freedom overweight test seat according to claim 2, characterized in that: The telescopic arm (1) further comprises a sleeved inner locking sleeve (105) having an outer thread and an outer locking sleeve (106) having an inner thread, one end of the inner locking sleeve (105) having a contraction structure, and the extension rod (103) and the hollow storage rod (101) form a telescopic rod structure.

4. The six-degree-of-freedom overweight test seat according to claim 3, characterized in that: The second end of the hollow storage rod (101) is fixedly connected to the inner locking sleeve (105), and the outer locking sleeve (106) is sleeved on the inner locking sleeve (105) to cooperate with each other to fix the position of the extension rod (103).

5. The six-degree-of-freedom overweight test seat according to claim 2, characterized in that: The angle position conversion mechanism further comprises a U-shaped frame (2) for supporting and moving the outer frame (4); the U-shaped frame (2) comprises two parallel U-shaped support frames (201) and two support rods (202) connected to the ends of the support frames (201); the outer frame (4) is fixed on a plane formed by the support frames (201); and the L-shaped connecting end (102) is fixed on the support rod (202).

6. The six-degree-of-freedom overweight test seat according to claim 5, characterized in that: The outer frame (4) is provided with I-shaped grooves (10) on two sides not connected to the inner frame (5); a locking slider (3) is connected to the I-shaped groove (10); and the outer frame (4) is movably fixedly connected to the support frame (201) via the locking slider (3).

7. The six-degree-of-freedom overweight test chair according to claim 5, characterized in that: The support rod (202) is provided with a slide groove (9), and the L-shaped connecting end (102) is movably fixed on the slide groove (9).

8. The six-degree-of-freedom overweight test chair according to claim 1, characterized in that: The animal fixing part (7) comprises: a fixed cage (701), a fixed back plate (702), a quick buckle (703), and a hinge (704); the fixed back plate (702) is fixed on the circular plate (6); one side of the fixed cage (701) is fixedly connected to the fixed back plate (702) through a hinge (704), and the other side is movably connected to the fixed back plate (702) through a quick buckle (703).

9. The six-degree-of-freedom overweight test chair according to claim 8, characterized in that: A fixed structure mounting hole (8) is provided at the center of the circular plate (6), and the fixed back plate (702) is mounted on the circular plate (6) through the fixed structure mounting hole (8).

10. The six-degree-of-freedom overweight test chair according to claim 8, characterized in that: The fixed cage (701) can be a semi-cylindrical or square box, and the specific shape is selected according to the body size of the animal.

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