A test tube clamping assembly and a test tube placement device with adjustable clamping position

Abstract

The utility model relates to test tube placing device field solves the problem that the layout quantity of prior art arc limiting board is limited, provides a test tube clamping subassembly and test tube placing device of clamping position adjustable, include: integrated board, clamping piece, adjusting spare, screw rod and guide piece, the integrated board includes a plurality of moving plate and adjusting board, through adjusting board connection between adjacent moving plate, the one end of adjusting spare stretches into the accommodation cavity, and the end of adjusting spare is equipped with first bevel gear, one end of screw rod is installed in the accommodation cavity, and the other end of screw rod is connected with adjacent moving plate threadedly, and screw rod is equipped with second bevel gear, the moving plate with sliding connection of guide piece, the guide piece with adjusting board connection, the utility model discloses through rotating adjusting spare drive moving plate movement, through the guide piece can limit the rotation of moving plate, and further make moving plate only have the free activity degree along the length direction of screw rod, and through the guide piece can improve the moving stability of moving plate.

Description

Technical Field

[0001] This utility model relates to the field of test tube placement devices, and more specifically, to a test tube clamping assembly and a test tube placement device with adjustable clamping position. Background Technology

[0002] On May 12, 2023, the applicant applied for a patent with publication number CN219984759U, entitled "An Adjustable Test Tube Placement Device." This device uses a rotating threaded rod, a sliding cylinder, and a sliding rod to slide and limit the adjustment plates. The threaded rod drives two adjustment plates towards the center, which in turn moves two adjacent arc-shaped limiting plates towards the center. This allows for convenient adjustment of the test tube clamping hole size, enabling the clamping and placement of test tubes of different sizes, thus improving the adaptability of the test tube placement rack. However, the spacing between adjacent arc-shaped limiting plates also limits the size of the test tubes. Therefore, to make the arc-shaped limiting plates suitable for more test tube sizes, a certain distance needs to be reserved between adjacent arc-shaped limiting plates to clamp larger test tubes. Given a fixed length of arc-shaped limiting plates, the number of arc-shaped limiting plates is limited. Utility Model Content

[0003] The purpose of this utility model is to provide a test tube clamping assembly that solves the problem in the prior art where the number of arc-shaped limiting plates is limited in order to ensure that the spacing between adjacent arc-shaped limiting plates does not affect the clamping of large-sized test tubes.

[0004] Another objective of this invention is to provide a test tube placement device with an adjustable clamping position, which is more adaptable to test tubes of different sizes.

[0005] The embodiments of this utility model are achieved through the following technical solutions:

[0006] A test tube clamping assembly includes: an integrated plate, a clamping member, an adjusting member, a screw, and a guide member. The integrated plate includes a plurality of movable plates and adjusting plates, adjacent movable plates are connected by the adjusting plates, and each adjusting plate has a receiving cavity. Each movable plate is equipped with one clamping member. The adjusting member passes through the movable plate, one end of the adjusting member extends into the receiving cavity, and the end of the adjusting member is provided with a first bevel gear. One end of the screw is installed in the receiving cavity, and the other end of the screw passes through the receiving cavity and is threadedly connected to an adjacent movable plate. The screw is provided with a second bevel gear that drives and engages with the first bevel gear. The end of the movable plate away from the screw is slidably connected to the guide member, and the end of the guide member away from the movable plate is connected to the adjusting plate.

[0007] Preferably, the guide includes: a mounting block and a guide rod, the mounting block being rotatably connected to the screw and disposed in the receiving cavity; one end of the guide rod is connected to the mounting block, and the other end of the guide rod extends out of the receiving cavity and is slidably connected to the moving plate.

[0008] Preferably, the end of the movable plate is provided with a through hole, and the end of the adjusting plate is fitted into the through hole; when the movable plate is in any moving position, there is a gap between at least one end of the adjusting plate and the bottom wall of the corresponding through hole.

[0009] Preferably, there are two integrated plates, which are arranged opposite to each other; the test tube clamping assembly further includes a driving device, which is connected to the two integrated plates and drives the two integrated plates to move towards each other or away from each other.

[0010] Preferably, the driving device includes: a connecting rod and a limiting telescopic member; the connecting rod has a first threaded section and a second threaded section, the first threaded section and the second threaded section have opposite thread directions; the two integrated plates are respectively inserted through the first threaded section and the second threaded section; the limiting telescopic member is connected to any of the adjusting plates.

[0011] Preferably, the limiting telescopic component includes: a movable rod and a connecting cylinder; one end of the movable rod is connected to the adjusting plate; the other end of the movable rod is slidably connected to the inner wall of the connecting cylinder.

[0012] Preferably, the opposing adjustment plates on the two integrated plates are connected by a synchronization device, which includes an end plate, a slide rod, a middle plate, a fifth bevel gear, a sixth bevel gear, and a rotating cylinder. The end plate has a transmission cavity, and the end of the adjustment member away from the receiving cavity extends into the transmission cavity and is connected to the third bevel gear. One end of the slide rod is connected to the third bevel gear via a fourth bevel gear, and the other end of the slide rod extends out of the transmission cavity. The middle plate has an inner cavity. The fifth bevel gear is rotatably connected to the top wall of the inner cavity. The sixth bevel gear is connected to the fifth bevel gear via a transmission device. The sixth bevel gear is rotatably connected to the middle plate via the rotating cylinder, and the rotating cylinder has a groove along its axial direction. The end of the slide rod has a slider that cooperates with the groove.

[0013] Preferably, the end plate has an opening, the end of the slide rod away from the fourth bevel gear protrudes through the opening, the side wall of the opening has an annular limiting groove, and the side wall of the slide rod has a limiting block that cooperates with the annular limiting groove.

[0014] An adjustable clamping position test tube placement device includes: a base, a frame, and a test tube clamping assembly; there are two frames, which are respectively disposed on both sides of the base; an integrated plate is installed on the frame.

[0015] Preferably, the frame includes: two vertical plates, a horizontal plate, a sliding plate, uprights, and a positioning plate. The two vertical plates are respectively disposed on both sides of the frame. The top ends of the two vertical plates are connected by the horizontal plate, and the horizontal plate has a plurality of vertical holes. The sliding plate is located below the horizontal plate, and the end of the sliding plate is slidably connected to the vertical plate. The sliding plate has a plurality of uprights corresponding to the vertical holes. The positioning plate is connected to the base, and the positioning plate has at least one positioning hole. The sliding plate has a connecting hole that mates with the positioning hole.

[0016] This utility model has at least the following beneficial effects:

[0017] This invention improves the integrated plate into a combination of a movable plate and an adjusting plate. By rotating the adjusting component, the first bevel gear drives the second bevel gear, the second bevel gear drives the screw to rotate, and the screw rotation drives the movable plate to move. The guide component restricts the rotation of the movable plate, so that the movable plate only has free movement along the length of the screw. At the same time, the guide component improves the movement stability of the movable plate. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an existing test tube placement device;

[0020] Figure 2 for Figure 1 Improved front view of the integrated circuit board;

[0021] Figure 3 for Figure 1 A cross-sectional view of the improved integrated circuit board;

[0022] Figure 4 This is the first comparative diagram of the integrated board structure;

[0023] Figure 5 This is a second comparison image of the integrated board structure;

[0024] Figure 6 Top view of the connection structure of the synchronization device;

[0025] Figure 7 This is a cross-sectional view of the synchronization device;

[0026] Figure 8for Figure 7 Detailed view of point A in the middle;

[0027] Figure 9 This is a schematic diagram of the clamping component.

[0028] Icons: 1-Integrated plate, 11-Moving plate, 111-Through hole, 12-Adjusting plate, 2-Clamping component, 21-Arc-shaped limiting plate, 22-Guide cylinder, 23-Spring, 24-Telescopic rod, 3-Adjusting component, 31-First bevel gear, 4-Screw, 41-Second bevel gear, 5-Guide component, 51-Mounting block, 52-Guide rod, 6-Drive device, 61-Connecting rod, 611-First threaded section, 612-Second threaded section, 62-Limiting telescopic component, 621-Moving rod 622-Connecting cylinder, 7-Synchronization device, 71-End plate, 711-Opening, 7111-Annular limiting groove, 72-Third bevel gear, 73-Slide rod, 731-Slider, 732-Limiting block, 74-Fourth bevel gear, 75-Middle plate, 76-Fifth bevel gear, 77-Sixth bevel gear, 78-Rotating cylinder, 781-Slide groove, 8-Base, 9-Frame, 91-Vertical plate, 92-Horizontal plate, 921-Vertical hole, 93-Sliding plate, 94-Column, 95-Positioning plate. Detailed Implementation

[0029] To make the objectives, methods, and advantages of the embodiments of this utility model clearer, the methods in the embodiments of this utility model will be clearly and completely described. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0030] Example 1: As Figure 1-3 As shown, a test tube clamping assembly includes: an integrated plate 1, a clamping member 2, an adjusting member 3, a screw 4, and a guide member 5. The integrated plate 1 includes a plurality of movable plates 11 and adjusting plates 12, adjacent movable plates 11 are connected by the adjusting plates 12, and the adjusting plates 12 are provided with accommodating cavities. Each movable plate 11 is provided with one clamping member 2. The adjusting member 3 passes through the movable plate 11, one end of the adjusting member 3 extends into the accommodating cavity, and the end of the adjusting member 3 is provided with a first bevel gear 31. One end of the screw 4 is installed in the accommodating cavity, and the other end of the screw 4 passes through the accommodating cavity and is threadedly connected to the adjacent movable plate 11. The screw 4 is provided with a second bevel gear 41 that drives and cooperates with the first bevel gear 31. The end of the movable plate 11 away from the screw is slidably connected to the guide member 5, and the end of the guide member 5 away from the movable plate 11 is connected to the adjusting plate 12.

[0031] In specific implementation, this embodiment mainly improves Figure 1The integrated plate 1 in the middle allows the spacing between adjacent clamping members 2 on the integrated plate 1 to be adjusted, and the clamping members 2 can be set as follows: Figure 1 The arc-shaped limiting plate 21 shown can stably hold the test tube by clamping it with two arc-shaped limiting plates 21. In this embodiment, the integrated plate 1 is improved into a combination of a moving plate 11 and an adjusting plate 12. By rotating the adjusting member 3, the first bevel gear 31 can drive the second bevel gear 41, the second bevel gear 41 can drive the screw 4 to rotate, and the rotation of the screw 4 can drive the moving plate 11 to move. The adjusting member 3 can be used as follows: Figure 3 As shown, a knob is located above the adjusting plate 12, and the first bevel gear 31 is rotated by rotating the knob. In addition, the rotation of the moving plate 11 can be restricted by the guide member 5, so that the moving plate 11 only has free movement along the length direction of the screw 4, and the moving plate 11 can be improved by the guide member 5.

[0032] If adopts such Figure 4 The integrated plate 1 structure shown can also adjust the spacing between adjacent clamping members 2, and even improve the adjustment efficiency. However, when the clamping members 2 on the integrated plate 1 need to clamp test tubes of different specifications simultaneously, assuming that a clamping member 2 has already clamped a test tube of specification A, but its adjacent clamping member 2 needs to clamp a test tube of specification B, when adjusting the distance between the clamping member 2 corresponding to the test tube of specification B and the clamping member 2 corresponding to the test tube of specification A, the already clamped test tube of specification A will move, thus affecting the clamping stability of the test tube of specification A and its adjacent already clamped test tubes. Therefore, this embodiment selects a structure as shown in the figure. Figure 3 In the structure shown, when the adjusting member 3 rotates, only the moving plate 11 located at one end of the adjusting plate 12 moves.

[0033] When the test tubes to be clamped by the integrated plate 1 are all of the same specification, the clamping component 2 can refer to the patent filed by the applicant on May 12, 2023, with publication number CN219984759U and patent name "An Adjustable Test Tube Placement Device".

[0034] When integrated plate 1 needs to clamp test tubes of different specifications simultaneously, clamping component 2 can be referred to Figure 9 As shown in the structural configuration, the telescopic rod 24 can move within the guide cylinder 22 via the spring 23, thereby allowing the position of the arc-shaped limiting plate 21 to adapt to the specifications of the test tube.

[0035] Example 2: As Figure 3 As shown, an improvement has been made based on Embodiment 1. In this embodiment, the guide member 5 includes: a mounting block 51 and a guide rod 52. The mounting block 51 is rotatably connected to the screw and is disposed in the accommodating cavity. One end of the guide rod 52 is connected to the mounting block 51, and the other end of the guide rod 52 extends out of the accommodating cavity and is slidably connected to the moving plate 11.

[0036] In the specific implementation process, the mounting block 51 can be set as a prism. The mutual restriction between the mounting block 51 and the inner wall of the accommodating cavity can prevent the mounting block 51 from rotating with the screw 4, thereby preventing the rotation of the guide rod 52.

[0037] Example 3: To improve the moving stability of the moving plate 11, improvements were made based on Example 1, such as... Figure 3 As shown, in this embodiment, the end of the movable plate 11 is provided with a through hole 111, and the end of the adjusting plate 12 is fitted inside the through hole 111; when the movable plate 11 is in any moving position, there is a gap between at least one end of the adjusting plate 12 and the bottom wall of the corresponding through hole 111.

[0038] In practice, the through hole 111 can be rectangular. The mutual constraint between the inner wall of the through hole 111 and the outer wall of the adjusting plate 12 can improve the movement stability of the moving plate 11. To reduce the movement resistance of the moving plate 11, the outer wall of the moving plate 11 and the inner wall of the through hole 111 can be slidably connected.

[0039] like Figure 5 As shown, when the movable plate 11 does not have a through hole 111, a certain length of guide rod 52 and / or screw 4 will be exposed.

[0040] Example 4: To achieve the clamping of the test tube, improvements were made based on Examples 1-3, such as... Figure 1 As shown, in this embodiment, there are two integrated plates 1, which are arranged opposite to each other; the test tube clamping assembly also includes a driving device 6, which is connected to the two integrated plates 1 and drives the two integrated plates 1 to move towards each other or away from each other.

[0041] In practice, the distance between the integrated plates 1 is adjusted by the drive device 6 to accommodate test tubes of different sizes, and multiple test tubes can be clamped simultaneously. The drive device 6 can be an electric telescopic rod 24, with each integrated plate 1 individually equipped with an electric telescopic rod 24.

[0042] Example 5: To simplify the synchronous movement of the two integrated boards 1, improvements were made based on Example 4, such as... Figure 1 As shown, in this embodiment, the driving device 6 includes a connecting rod 61 and a limiting telescopic member 62. The connecting rod 61 is provided with a first threaded section 611 and a second threaded section 612. The thread directions of the first threaded section 611 and the second threaded section 612 are opposite. The two integrated plates 1 are respectively passed through the first threaded section 611 and the second threaded section 612. The limiting telescopic member 62 is connected to any of the adjusting plates 12.

[0043] In practical implementation, a gripping part can be provided at the end of the connecting rod 61 to facilitate manual rotation of the connecting rod 61. When the connecting rod 61 rotates, the two integrated plates 1 move closer or further apart under the action of the first threaded section 611 and the second threaded section 612. The purpose of the limiting telescopic member 62 is to restrict the rotation of the integrated plate 1, so that the integrated plate 1 can be smoothly moved when the threaded section rotates. In addition, the telescopic characteristic of the limiting telescopic member 62 can adapt to the length required for different positions of the integrated plate 1.

[0044] Example 6: Based on Example 5, this example provides a structure for a limiting telescopic member 62, which includes a moving rod 621 and a connecting cylinder 622; one end of the moving rod 621 is connected to the adjusting plate 12; the other end of the moving rod 621 is slidably connected to the inner wall of the connecting cylinder 622.

[0045] In the specific implementation process, the movable rod 621 can move freely within the connecting cylinder 622. The movable rod 621 can be equipped with a slider 731. The connecting cylinder 622 is provided with a groove 781 extending along its axial direction. The movement path can be restricted through the end of the groove 781 to prevent the movable rod 621 from coming out of the connecting cylinder 622.

[0046] Example 7: To achieve synchronous adjustment of the relative positions of the clamping components 2 on the two integrated plates 1, improvements were made based on Example 4, such as... Figure 6-8 As shown, in this embodiment, the opposing adjustment plates 12 on the two integrated plates 1 are connected by a synchronization device 7. The synchronization device 7 includes: an end plate 71, a slide rod 73, a middle plate 75, a fifth bevel gear 76, a sixth bevel gear 77, and a rotating cylinder 78. The end plate 71 is provided with a transmission cavity. One end of the adjustment member 3 away from the accommodating cavity extends into the transmission cavity and is connected to the third bevel gear 72. One end of the slide rod 73 is connected to the third bevel gear 72 through a fourth bevel gear 74, and the other end of the slide rod 73 extends out of the transmission cavity. The middle plate 75 is provided with an inner cavity. The fifth bevel gear 76 is rotatably connected to the top wall of the inner cavity. The sixth bevel gear 77 is connected to the fifth bevel gear 76 through a transmission. The sixth bevel gear 77 is rotatably connected to the middle plate 75 through the rotating cylinder 78. The rotating cylinder 78 is provided with a groove 781 along its axial direction, and the end of the slide rod 73 is provided with a slider 731 that cooperates with the groove 781.

[0047] In practical implementation, since two corresponding clamping parts 2 on the integrated plate 1 are needed when clamping the test tube, adjusting the position of one clamping part 2 also requires adjusting the position of its opposite clamping part 2. To simplify the aforementioned adjustment process and easily achieve the relative positions of the two clamping parts 2, this embodiment includes a synchronization device 7. The fifth bevel gear 76 can be... Figure 7As shown, the rotation is driven by a knob. The fifth bevel gear 76 drives the sixth bevel gear 77 to rotate, which in turn drives the rotating cylinder 78 to rotate. The groove wall of the sliding groove 781 inside the rotating cylinder 78 drives the sliding rod 73 to rotate. The sliding rod 73 drives the third bevel gear 72 through the fourth bevel gear 74, and the third bevel gear 72 drives the first bevel gear 31 to rotate. The direction of rotation during the transmission process can be referenced. Figure 7 As shown by the arrow, the first bevel gears 31 corresponding to the two end plates 71 rotate in the same direction, which can realize the synchronous movement of the relative clamping parts 2 on the two integrated plates 1.

[0048] When adjusting the distance between the two integrated plates 1, the integrated plate 1 pushes the end plate 71, and the end plate 71 pushes the slide rod 73 to move along the length direction of the rotating cylinder 78.

[0049] Example 8: To achieve the limiting of the fourth bevel gear at position 74, improvements were made based on Example 7, such as... Figure 8 As shown, in this embodiment, the end plate 71 is provided with an opening 711, and the end of the slide rod 73 away from the fourth bevel gear 74 passes through the opening 711. The side wall of the opening 711 is provided with an annular limiting groove 7111, and the side wall of the slide rod 73 is provided with a limiting block 732 that cooperates with the annular limiting groove 7111.

[0050] In practice, the annular limiting groove 7111 will not affect the rotation of the slide rod 73, but the cooperation between the annular limiting groove 7111 and the limiting block 732 can prevent relative movement between the slide rod 73 and the opening 711. The center of the annular limiting groove 7111 can be on the central axis of the opening 711.

[0051] Example 9: As Figure 1 As shown, this embodiment provides a test tube placement device with adjustable clamping position, including: a base 8, a frame 9, and a test tube clamping assembly; there are two frames 9, which are respectively disposed on both sides of the base 8; the integrated plate 1 is installed on the frame 9.

[0052] In practice, during installation, the connecting rod 61 of the integrated plate 1 can be inserted between the two frames 9. The connecting cylinder 622 on the limiting telescopic component 62 can be fixedly installed on the frame 9. A limiting telescopic component 62 can be provided at each end of the integrated plate 1.

[0053] Example 10: To facilitate the placement of test tubes after cleaning, improvements were made based on Example 9, such as... Figure 1As shown, in this embodiment, the frame 9 includes: two vertical plates 91, a horizontal plate 92, a sliding plate 93, uprights 94, and a positioning plate 95. The two vertical plates 91 are respectively disposed on both sides of the frame 9. The top ends of the two vertical plates 91 are connected by the horizontal plate 92, and the horizontal plate 92 is provided with a plurality of vertical holes 921. The sliding plate 93 is located below the horizontal plate 92, and the end of the sliding plate 93 is slidably connected to the vertical plate 91. The sliding plate 93 is provided with a plurality of uprights 94 corresponding to the vertical holes 921. The positioning plate 95 is connected to the base 8, and the positioning plate 95 is provided with at least one positioning hole. The sliding plate 93 is provided with a connecting hole that mates with the positioning hole.

[0054] In practice, the sliding plate 93 and the positioning plate 95 can be connected by bolts or screws. A positioning hole can be provided on the upper part of the positioning plate 95. After raising the sliding plate 93, connect the sliding plate 93 and the positioning plate 95. At this time, the column 94 passes through the vertical hole 921. The cleaned test tubes are placed upside down on the horizontal plate 92, and the column 94 prevents them from falling over. When the column 94 is not needed, lowering the sliding plate 93 allows for its storage, reducing the space occupied by the test tube placement device. The sliding connection between the sliding plate 93 and the vertical plate 91 not only improves the stability of the sliding plate 93's movement but also restricts its position, allowing the column 94 on the sliding plate 93 to smoothly pass through the corresponding vertical hole 921 simultaneously.

[0055] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test tube clamping assembly, characterized in that, include: An integrated plate (1) includes several movable plates (11) and an adjusting plate (12), adjacent movable plates (11) are connected by the adjusting plate (12), and the adjusting plate (12) is provided with a receiving cavity; Clamping member (2), one clamping member (2) is provided for each of the moving plates (11); Adjusting member (3), the adjusting member (3) passes through the moving plate (11), one end of the adjusting member (3) extends into the receiving cavity, and the end of the adjusting member (3) is provided with a first bevel gear (31); A screw (4), one end of which is installed in the accommodating cavity, and the other end of which passes through the accommodating cavity and is threadedly connected to the adjacent movable plate (11). The screw (4) is provided with a second bevel gear (41) that is in transmission cooperation with the first bevel gear (31). The guide (5) is slidably connected to the guide (5) at one end of the moving plate (11) away from the screw, and the guide (5) at one end away from the moving plate (11) is connected to the adjusting plate (12).

2. The test tube clamping assembly according to claim 1, characterized in that, The guide (5) includes: Mounting block (51), which is rotatably connected to the screw, and is located in the receiving cavity; A guide rod (52) is provided, one end of which is connected to the mounting block (51), and the other end of which extends out of the accommodating cavity and is slidably connected to the moving plate (11).

3. The test tube clamping assembly according to claim 1, characterized in that, The end of the movable plate (11) is provided with a through hole (111), and the end of the adjusting plate (12) is fitted inside the through hole (111); When the movable plate (11) is in any moving position, there is a gap between at least one end of the adjusting plate (12) and the bottom wall of the corresponding through hole (111).

4. The test tube clamping assembly according to any one of claims 1-3, characterized in that, There are two integrated plates (1), which are arranged opposite to each other; the test tube clamping assembly also includes: A driving device (6) is connected to the two integrated boards (1) and drives the two integrated boards (1) to move towards each other or away from each other.

5. The test tube clamping assembly according to claim 4, characterized in that, The driving device (6) includes: A connecting rod (61) is provided with a first threaded section (611) and a second threaded section (612). The thread directions of the first threaded section (611) and the second threaded section (612) are opposite. The two integrated plates (1) are respectively passed through the first threaded section (611) and the second threaded section (612). Limiting telescopic member (62), which is connected to any of the adjusting plates (12).

6. The test tube clamping assembly according to claim 5, characterized in that, The limiting telescopic component (62) includes: A movable rod (621), one end of which is connected to the adjusting plate (12); The connecting cylinder (622) has the other end of the moving rod (621) slidably connected to the inner wall of the connecting cylinder (622).

7. The test tube clamping assembly according to claim 4, characterized in that, The opposing adjustment plates (12) on the two integrated plates (1) are connected by a synchronization device (7), which includes: End plate (71), the end plate (71) is provided with a transmission cavity, and the end of the adjusting member (3) away from the accommodating cavity extends into the transmission cavity and is connected to the third bevel gear (72); A slide rod (73), one end of which is connected to the third bevel gear (72) via a fourth bevel gear (74), and the other end of which extends out from the transmission cavity; The middle plate (75) has an inner cavity; The fifth bevel gear (76) is rotatably connected to the top wall of the inner cavity; The sixth bevel gear (77) is connected to the fifth bevel gear (76) in a transmission manner; The rotating cylinder (78) is rotatably connected to the middle plate (75) via the sixth bevel gear (77). The rotating cylinder (78) is provided with a groove (781) along its axial direction. The end of the slide rod (73) is provided with a slider (731) that cooperates with the groove (781).

8. The test tube clamping assembly according to claim 7, characterized in that, The end plate (71) is provided with an opening (711), and the end of the slide rod (73) away from the fourth bevel gear (74) passes through the opening (711). The side wall of the opening (711) is provided with an annular limiting groove (7111), and the side wall of the slide rod (73) is provided with a limiting block (732) that cooperates with the annular limiting groove (7111).

9. A test tube placement device with adjustable clamping position, characterized in that, include: Base (8); The frame (9) has two parts, which are respectively located on both sides of the base (8); The test tube clamping assembly according to any one of claims 1-8, wherein the integrated plate (1) is mounted on the frame (9).

10. The test tube placement device according to claim 9, characterized in that, The frame (9) includes: Two vertical plates (91) are respectively disposed on both sides of the frame (9); A horizontal plate (92) is provided, and the top ends of the two vertical plates (91) are connected by the horizontal plate (92). The horizontal plate (92) is provided with a plurality of vertical holes (921). A sliding plate (93) is located below the horizontal plate (92), and the end of the sliding plate (93) is slidably connected to the vertical plate (91); The sliding plate (93) is provided with a plurality of columns (94) corresponding to the vertical holes (921); Positioning plate (95) is connected to base (8). Positioning plate (95) has at least one positioning hole. Sliding plate (93) has a connecting hole that mates with the positioning hole.

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