Simple manual centrifugal machine established based on gear transmission ratio change

Abstract

The utility model discloses a simple manual centrifuge established based on gear transmission ratio change, which comprises a casing, a long metal rod and a short metal rod are fixedly connected in the casing, a rotating shaft is rotatably connected between the end part of the short metal rod and the inner wall of the casing, and a plurality of gears are sleeved on the long metal rod, the short metal rod and the rotating shaft. According to the utility model, the work of manually rotating the rotating shaft is transmitted to the gear Af at the farthest distance, so that the rotating speed of the gear is gradually increased according to indexes and is converted into high-speed rotation, and a liquid and solid mixed sample can be simply separated; the whole device has no complicated structure, is low in manufacturing cost and simple to operate, can be realized only by rotating the handle, can simply increase the rotating speed to 1000 revolutions per minute by increasing the manual speed and the speed of the gear at the tail end according to indexes, does not depend on electric power, and is convenient to use outdoors.

Description

Technical Field

[0001] The utility model relates to the technical field of DNA centrifuges for soil-borne diseases, and more specifically, to a simple manual centrifuge established based on the change of gear transmission ratio. Background Art

[0002] The detection of plant soil-borne diseases is helpful for the selective application of pesticides, fungicides, etc., and is beneficial to the safe production of crops. However, the simplicity of detection has always been an extremely difficult problem to solve.

[0003] The development of rapid detection kits is the current direction for the rapid detection of field diseases. In the rapid detection kits, a centrifuge is required during the DNA extraction process of soil-borne diseases. The centrifuge can quickly separate pathogenic microorganisms and insoluble solid soils in the soil. However, the field environment limits the access to power. Based on the above situation, a simple manual centrifuge established based on the change of gear transmission ratio is proposed, which is used in conjunction with the rapid detection kit for pathogenic microorganisms developed by our company. Summary of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide a simple manual centrifuge established based on the change of gear transmission ratio.

[0005] To solve the above problems, the utility model adopts the following technical solutions.

[0006] A simple manual centrifuge established based on the change of gear transmission ratio includes a machine shell. A long metal rod and a short metal rod are fixedly connected inside the machine shell. A rotating shaft is rotatably connected between the end of the short metal rod and the inner wall of the machine shell. A number of gears are sleeved on the long metal rod, short metal rod and rotating shaft. The number of gears is marked as gear Aa, gear Ab, gear Ac, gear Ad, gear Ae, gear Af, gear Ba, gear Bb, gear Bc, gear Bd, gear Be.

[0007] Among them, the gear Aa is fixedly sleeved on the rotating shaft. The gear Ba, gear Ab, gear Bc, gear Ad, gear Be and gear Af are rotatably arranged on the outer wall of the long metal rod in sequence from front to back. The gear Bb, gear Ac, gear Bd and gear Ae are rotatably arranged on the outer wall of the short metal rod in sequence from front to back. The gear Aa meshes with the gear Ba. The gear Ab is fixedly connected to the back of the gear Ba and meshes with the gear Bb. The gear Ac is fixedly connected to the back of the gear Bb and meshes with the gear Bc. The gear Ad is fixedly connected to the back of the gear Bc and meshes with the gear Bd. The gear Ae is fixedly connected to the back of the gear Bd and meshes with the gear Be. The gear Af is fixedly connected to the back of the gear Be.

[0008] Further, a groove is provided on the back surface of the gear Af, and the grooves are circumferentially and arrayed. A cover is engaged with the opening of the groove.

[0009] Further, a through groove is provided on the back surface of the casing, and the through grooves are circumferentially and arrayed. The number and position of the through grooves are adapted to the grooves, and the size of the through groove is larger than the size of the groove.

[0010] Further, the gears Aa, Ab, Ac, Ad, Ae, and Af are all helical gears and have the same specifications. The gears Ba, Bb, Bc, Bd, and Be are all helical gears and have the same specifications. The ratio of the number of the gears Aa to the gear Ba is 2:1.

[0011] Further, it includes a grip. The grip is a "Z"-shaped member, and anti-slip patterns are provided on the grip.

[0012] Further, the front end of the rotating shaft penetrates through the casing and extends to be flush with the front side surface of the casing. A square groove is provided at the front end of the rotating shaft. One end of the grip is set as a square and can be inserted into the square groove to be connected to the rotating shaft.

[0013] Further, brackets are fixedly connected to both the front side and the rear side below the casing.

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] The whole has no complex structure, low cost, simple operation. It only needs to rotate the handle to achieve. The manual speed and the speed of the gear at the end increase exponentially. The rotation speed can be simply increased to 1000 revolutions per minute. It does not rely on electricity and is convenient for outdoor use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic diagram of the whole of the present utility model;

[0017] Figure 2 is a rear three-dimensional structure schematic diagram of the whole of the present utility model;

[0018] Figure 3 is a partial sectional three-dimensional structure schematic diagram of the whole of the present utility model;

[0019] Figure 4 is an exploded schematic diagram of the gear Af and the cover of the present utility model.

[0020] Explanation of the reference numerals in the drawings:

[0021] 1. Housing; 2. Long metal rod; 3. Short metal rod; 4. Rotating shaft; 41. Square groove; 5. Gear; 51. Gear Aa; 52. Gear Ab; 53. Gear Ac; 54. Gear Ad; 55. Gear Ae; 56. Gear Af; 57. Gear Ba; 58. Gear Bb; 59. Gear Bc; 510. Gear Bd; 511. Gear Be; 6. Groove; 7. Cover; 8. Through groove; 9. Grip; 10. Bracket. Detailed implementation manner

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention;

[0023] Please refer to Figures 1 to 4 , in the present invention, a simple manual centrifuge based on the change of gear transmission ratio includes a housing 1. A long metal rod 2 and a short metal rod 3 are fixedly connected inside the housing 1. A rotating shaft 4 is rotatably connected between the end of the short metal rod 3 and the inner wall of the housing 1. A plurality of gears 5 are sleeved on the long metal rod 2, the short metal rod 3 and the rotating shaft 4. The plurality of gears 5 are marked as gear Aa 51, gear Ab 52, gear Ac 53, gear Ad 54, gear Ae 55, gear Af 56, gear Ba 57, gear Bb 58, gear Bc 59, gear Bd 510, gear Be 511.

[0024] Among them, the gear Aa 51 is fixedly sleeved on the rotating shaft 4. The gear Ba 57, gear Ab 52, gear Bc 59, gear Ad 54, gear Be 511 and gear Af 56 are rotatably arranged on the outer wall of the long metal rod 2 in sequence from front to back. The gear Bb 58, gear Ac 53, gear Bd 510 and gear Ae 55 are rotatably arranged on the outer wall of the short metal rod 3 in sequence from front to back. The gear Aa 51 meshes with the gear Ba 57. The gear Ab 52 is fixedly connected to the back of the gear Ba 57 and meshes with the gear Bb 58. The gear Ac 53 is fixedly connected to the back of the gear Bb 58 and meshes with the gear Bc 59. The gear Ad 54 is fixedly connected to the back of the gear Bc 59 and meshes with the gear Bd 510. The gear Ae 55 is fixedly connected to the back of the gear Bd 510 and meshes with the gear Be 511. The gear Af 56 is fixedly connected to the back of the gear Be 511.

[0025] In this embodiment, preferably, a circumferentially arrayed groove 6 is formed on the back of the gear Af 56, and a cover 7 is clamped at the opening of the groove 6;

[0026] Specifically, the groove 6 is used to hold samples, place multiple 1.5 ml centrifuge tubes or 15 ml conical tubes. After placing the samples, the opening of the groove 6 is closed by the cover 7 to block the samples and prevent them from slipping out of the groove 6. The structure of the cover 7 is similar to the back cover of a remote control.

[0027] In this embodiment, preferably, through grooves 8 are arranged in a circumferential array on the back of the housing 1. The number and position of the through grooves 8 are adapted to the groove 6, and the size of the through groove 8 is larger than that of the groove 6.

[0028] Specifically, through the design of the through groove 8, it is convenient to take and place samples.

[0029] In this embodiment, preferably, the gears Aa51, Ab52, Ac53, Ad54, Ae55 and Af56 are all helical gears 5 and have the same specifications. The gears Ba57, Bb58, Bc59, Bd510 and Be511 are all helical gears 5 and have the same specifications. The ratio of the number of the gear Aa51 to the gear Ba57 is 2:1.

[0030] Specifically, due to the meshing setting of the gears 5 with a ratio of 2:1, the rotational speed of the gears 5 increases exponentially.

[0031] In this embodiment, preferably, it includes a grip 9. The grip 9 is a "Z"-shaped member, and anti-slip patterns are provided on the grip 9.

[0032] Specifically, the grip 9 is used to drive the rotation of the rotating shaft 4. The anti-slip patterns on the grip 9 itself can increase the friction force.

[0033] In this embodiment, preferably, the front end of the rotating shaft 4 penetrates through the housing 1 and extends to be flush with the front side of the housing 1. A square groove 41 is provided at the front end of the rotating shaft 4. One end of the grip 9 is set to be square and can be inserted into the square groove 41 to be connected with the rotating shaft 4.

[0034] Specifically, one end of the grip 9 is set to be square and can be adapted to the square groove.

[0035] In this embodiment, preferably, brackets 10 are fixedly connected to both the front and rear lower sides of the housing 1.

[0036] Specifically, when the housing 1 is placed flat on the ground, the brackets 10 contact the ground and are convenient for stepping on and fixing with both feet, so as to facilitate manual force application for rotation. When not in use, the housing 1 can also be lifted by the brackets 10 for transfer.

[0037] The working principle and usage steps of the present utility model:

[0038] First, place multiple 1.5 ml centrifuge tubes or 15 ml conical tubes into the groove 6 and seal them with the cap 7. Insert the grip 9 into the square groove at the end of the rotating shaft 4. One can step on the bracket 10 to facilitate manual rotation and exert force.

[0039] The grip 9 drives the rotating shaft 4 to rotate the gear Aa51, and the gear Ba57 meshing with the gear Aa51 rotates accordingly. The gear Ba57 rotates synchronously with the gear Ab52 and the rotational speed is twice that of the gear Aa51.

[0040] When the gear Ab52 rotates, it drives the gear Bb58 meshing with it to rotate. The gear Bb58 rotates synchronously with the gear Ac53 and the rotational speed is twice that of the gear Ab52.

[0041] When the gear Ac53 rotates, it drives the gear Bc59 meshing with it to rotate. The gear Bc59 rotates synchronously with the gear Ad54 and the rotational speed is twice that of the gear Ac53.

[0042] When the gear Ad54 rotates, it drives the gear Bd510 meshing with it to rotate. The gear Bd510 rotates synchronously with the gear Ae55 and the rotational speed is twice that of the gear Ad54.

[0043] When the gear Ae55 rotates, it drives the gear Be511 meshing with it to rotate. The gear Be511 rotates synchronously with the gear Af56 and the rotational speed is twice that of the gear Ae55.

[0044] The work of manually rotating the rotating shaft 4 is transmitted to the gear Af56 at the farthest distance, achieving an exponential increase in the rotational speed of the gear 5 and transforming it into high-speed rotation, which facilitates the simple separation of liquid and solid mixed samples. The overall structure is not complex, the cost is low, the operation is simple, and it only requires the ability to turn the handle to achieve. The manual speed and the speed of the gear 5 at the end increase exponentially, and the rotational speed can be simply increased to 1000 revolutions per minute. It does not rely on electricity and is convenient for outdoor use.

[0045] It should be noted that theoretically, increasing the number of gears 5 can exponentially increase the rotational speed. However, limited by force transmission and safety considerations, the number and distribution of gears 5 in this utility model are selected to meet the simple centrifugation requirements.

[0046] The parts and modules used in the content of this utility model can all be commonly used parts on the current market that can achieve the specific functions in this case, and the specific models and sizes can be selected and adjusted according to actual needs. The electronic components and modules are all connected to the external power supply and control switch for use. Their specific circuit connection methods and usage methods are all commonly public technologies and will not be elaborated here too much.

[0047] The above are only the preferred specific embodiments of the present utility model; however, the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its improved conceptions, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present utility model.

Claims

1. A simple manual centrifuge based on a gear ratio change, comprising a housing (1), characterized in that: A long metal rod (2) and a short metal rod (3) are fixedly connected inside the housing (1); a rotating shaft (4) is rotatably connected between the end of the short metal rod (3) and the inner wall of the housing (1); a plurality of gears are sleeved on the long metal rod (2), the short metal rod (3) and the rotating shaft (4); the plurality of gears are marked as gear Aa (51), gear Ab (52), gear Ac (53), gear Ad (54), gear Ae (55), gear Af (56), gear Ba (57), gear Bb (58), gear Bc (59), gear Bd (510), and gear Be (511); The gear Aa (51) is fixedly sleeved on the rotating shaft (4); the gear Ba (57), gear Ab (52), gear Bc (59), gear Ad (54), gear Be (511) and gear Af (56) are rotatably arranged on the outer wall of the long metal rod (2) in sequence from front to back; the gear Bb (58), gear Ac (53), gear Bd (510) and gear Ae (55) are rotatably arranged on the outer wall of the short metal rod (3) in sequence from front to back; the gear Aa (51) is meshed with the gear Ba (57); The gear Ab (52) is fixedly connected to the back of the gear Ba (57) and meshes with the gear Bb (58), the gear Ac (53) is fixedly connected to the back of the gear Bb (58) and meshes with the gear Bc (59), the gear Ad (54) is fixedly connected to the back of the gear Bc (59) and meshes with the gear Bd (510), the gear Ae (55) is fixedly connected to the back of the gear Bd (510) and meshes with the gear Be (511), and the gear Af (56) is fixedly connected to the back of the gear Be (511).

2. A simple manual centrifuge based on the change of gear transmission ratio according to claim 1, characterized in that: The back side of the gear Af (56) is provided with grooves (6) distributed in a circumferential array, and a cover (7) is engaged at the opening of the groove (6).

3. A simple manual centrifuge based on the change of gear transmission ratio according to claim 2, characterized in that: The back side of the housing (1) is provided with through slots (8) distributed in a circumferential array, the number and position of the through slots (8) are adapted to the grooves (6), and the size of the through slots (8) is larger than the size of the grooves (6).

4. A simple manual centrifuge based on the change of gear transmission ratio according to claim 1, characterized in that: The gear Aa (51), gear Ab (52), gear Ac (53), gear Ad (54), gear Ae (55) and gear Af (56) are all helical gears with the same specifications. The gear Ba (57), gear Bb (58), gear Bc (59), gear Bd (510) and gear Be (511) are all helical gears with the same specifications. The number of gears Aa (51) and gears Ba (57) is 2:

1.

5. A simple manual centrifuge based on the change of gear transmission ratio according to claim 1, characterized in that: It comprises a handle (9), wherein the handle (9) is a "Z"-shaped component, and an anti-slip pattern is provided on the handle (9).

6. A simple manual centrifuge based on the change of gear transmission ratio according to claim 5, characterized in that: The front end of the rotating shaft (4) passes through the housing (1) and extends to be flush with the front side of the housing (1). The front end of the rotating shaft (4) is provided with a square groove (41). One end of the handle (9) is arranged in a square shape and can be inserted into the square groove (41) to be connected to the rotating shaft (4).

7. A simple manual centrifuge based on the change of gear transmission ratio according to claim 1, characterized in that: Brackets (10) are fixedly connected to the front side and the lower part of the rear side of the casing (1).

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