Sample suction needle grounding protection device

Abstract

The utility model belongs to the technical field of sampling equipment protection, and particularly relates to a sample suction needle grounding protection device which comprises a support and a damping assembly, a movable rod is arranged on the support, a connecting plate is arranged at the upper end of the movable rod, a suction needle is arranged on the connecting plate, and a steering driving motor is arranged on the support. The steering driving motor is connected with the movable rod through the steering transmission assembly, the lifting driving motor is connected with the movable rod through the lifting transmission assembly, a bottom plate is arranged at the lower end of the movable rod, the damping assembly comprises a damping cylinder, the lower end of the movable rod is inserted into the damping cylinder, the bottom plate is arranged in the damping cylinder, and the diameter of the bottom plate is smaller than that of a cavity in the damping cylinder. A damping body is arranged in the damping cylinder, when the movable rod moves downwards, the bottom plate at the lower end of the movable rod can make contact with the damping body in the damping cylinder, the movement speed of the movable rod is reduced, then impact force generated when the suction needle makes contact with the bottom is reduced, and the suction needle is protected; damage or slight deformation of the head end of the suction needle due to collision and impact is avoided or relieved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sampling device protection, and particularly relates to a sample suction needle bottom-touching protection device. BACKGROUND

[0002] The suction needle on the sampling device needs to move between a reagent storage station, a sample sampling station, a reaction station and the like, so that the suction needle needs to have actions such as lifting and rotating. Meanwhile, some samples have a sedimentation phenomenon, and the sediment at the lower end of the sample storage tube needs to be suction sampled. However, the suction needle and the sample storage tube can be in contact, which can cause the head end of the suction needle to be damaged or slightly deformed due to collision impact.

[0003] At present, the sampling device mainly relies on selecting driving components, such as selecting a motor with higher running precision. However, it is inevitable that the motor slows down from a certain rotating speed to 0 before the suction needle touches the bottom. Therefore, slowing down the movement speed of the suction needle and further reducing the impact force generated when the suction needle touches the bottom can achieve protection of the head end of the suction needle. CONTENT OF THE INVENTION

[0004] The application provides a sample suction needle bottom-touching protection device to solve the above problems.

[0005] The application aims to provide a sample suction needle bottom-touching protection device, which slows down the descending speed of the movable rod by arranging a damper, further reduces the impact force generated when the suction needle touches the bottom, and achieves protection of the head end of the suction needle.

[0006] To achieve the purpose of the application, the technical scheme of the application is as follows:

[0007] The sample suction needle bottom-touching protection device comprises a support and a damping assembly. The support is provided with a movable rod. The upper end of the movable rod is provided with a connecting plate. The connecting plate is provided with a suction needle. The support is provided with a steering drive motor and a lifting drive motor. The steering drive motor is connected to the movable rod through a steering transmission assembly. The lifting drive motor is connected to the movable rod through a lifting transmission assembly. The lower end of the movable rod is provided with a bottom plate. The damping assembly comprises a damping cylinder. The lower end of the movable rod is inserted into the damping cylinder. The bottom plate is arranged in the damping cylinder. The diameter of the bottom plate is smaller than the diameter of the inner cavity of the damping cylinder. A damping body is arranged in the damping cylinder. When the movable rod moves downward, the bottom plate will contact the damping body in the damping cylinder and slow down the movement speed of the movable rod, thereby reducing the impact force generated when the suction needle touches the bottom. When the movable rod moves upward, the bottom plate no longer contacts the damping body, so that the movement speed of the movable rod returns to normal.

[0008] Furthermore, the bracket includes a base, an upright plate on the base, a top plate on the upper part of the upright plate, a steering drive motor on the lower part of the top plate, a steering transmission assembly on the upper part of the top plate, and the lifting drive motor and the lifting transmission assembly on the upright plate. The bracket of this application serves as the load-bearing structure for each component, and the bracket is in the shape of an "I" and has a stable structure.

[0009] Furthermore, the lifting transmission assembly includes two lifting synchronous pulleys, on which a vertically arranged lifting synchronous belt is provided. The connecting seat is connected to the lifting synchronous belt. One end of the connecting seat is provided with a through hole, through which the movable rod passes. The other end of the connecting seat is provided with a slider. A slide rail is provided on the upright plate, and the slider is set on the slide rail.

[0010] Furthermore, the connecting seat is provided with a pin, the movable rod is provided with a groove, and one end of the pin is arranged in the groove; or, the connecting seat is provided with a bearing, and the movable rod is connected to the inner circumference of the bearing.

[0011] Furthermore, a fixing plate is provided on the connecting seat, which fixes the lifting timing belt to the connecting seat.

[0012] Furthermore, the steering transmission assembly includes two steering timing pulleys, on which a horizontally arranged steering timing belt is mounted.

[0013] Furthermore, a spline is provided in the shaft hole of a timing pulley for steering, and the movable rod is a splined shaft. When the movable rod is a splined shaft, the movable rod can both rotate and move up and down.

[0014] Furthermore, the damping cylinder is fixed to the base.

[0015] Furthermore, the damping body fills part of the damping cylinder.

[0016] Furthermore, holes are provided on the base plate.

[0017] Compared with the prior art, the beneficial effects of this application are as follows:

[0018] This application uses a steering drive motor and a steering transmission assembly to drive the movable rod to rotate, and a lifting drive motor and a lifting transmission assembly to drive the movable rod to move up and down, so that the suction needle on the movable rod can perform sampling and reagent collection operations between multiple workstations. A damping cylinder is arranged below the movable rod to cooperate with it. When the movable rod moves downward, the bottom plate at the lower end of the movable rod will contact the damping body in the damping cylinder and slow down the movement speed of the movable rod, thereby reducing the impact force generated when the suction needle touches the bottom, protecting the suction needle and avoiding or reducing the damage or slight deformation of the tip of the suction needle due to collision and impact. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the application, and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. Embodiments of the application described herein are not meant to be an inappropriate limitation on the scope of the application.

[0020] Figure 1 is a schematic view of the overall structure of the application;

[0021] Figure 2 is a front view of the application;

[0022] Figure 3 is a schematic view of the overall structure of the damping cylinder internal structure;

[0023] Figure 4 is Figure 3 is an enlarged view of area A in the figure.

[0024] in the figure:

[0025] 1, base, 2, vertical plate, 3, top plate, 4, steering drive motor, 5, steering transmission assembly, 6, lifting drive motor, 7, lifting transmission assembly, 8, connecting plate, 9, suction needle, 10, movable rod, 11, connecting seat, 12, sliding block, 13, sliding rail, 14, fixed plate, 15, damping cylinder, 16, bottom plate, 17, pin shaft, 18, groove. DETAILED DESCRIPTION

[0026] The application will be further described below with reference to the drawings and embodiments.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "comprising," when used in this specification, specify the presence of stated features, steps, operations, devices, components and / or combinations thereof, but do not preclude the presence or addition of one or more other features, steps, operations, devices, components and / or combinations thereof.

[0028] In the present application, the terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is a relationship word determined only for the purpose of describing the structural relationship of the components or elements of the present application, and cannot be understood as a limitation on the present application.

[0029] Example 1

[0030] This embodiment is a sampling device with a protective device. The sampling device moves between multiple stations such as reagent storage station, sample sampling station, and reaction station. Various test tubes and sample tubes are installed on a turntable. The sampling needle 9 of this embodiment is used to sample the sample from the sample tube. The protective device of this embodiment can protect the sampling needle 9, reduce the impact force when the sampling needle 9 touches the bottom, and thus reduce the deformation of the sampling needle 9. Specifically, the movement of the sampling needle 9 includes steering movement and lifting movement. Therefore, this embodiment includes a steering drive assembly that drives the sampling needle 9 to perform steering movement and a lifting drive assembly that drives the sampling needle 9 to perform lifting movement.

[0031] In this embodiment, the base 1 is used as the lower end, and the suction port of the suction needle 9 is used as the head end of the suction needle 9.

[0032] Combination Figures 1-4 In this embodiment, a support frame is used as the basis. The support frame includes a base 1, a vertical plate 2 is installed on the base 1, and a top plate 3 is installed on the upper end of the vertical plate 2. The base 1 and the top plate 3 are fixedly connected to the vertical plate 2 by bolts. The support frame is in the shape of an "I". The vertical plate 2 is used as a support plate and also as an isolation plate. A movable rod 10 is installed on the support frame. A connecting plate 8 is installed on the upper end of the movable rod 10. A suction needle 9 is installed on the connecting plate 8. In this embodiment, the suction needle 9 is rotated and lifted by driving the movable rod 10 to make a turning and lifting motion.

[0033] The overall structure of the steering drive assembly is as follows: a steering drive motor 4 is mounted on a bracket, and the steering drive motor 4 is bolted to the lower end of the top plate 3. The output axis of the steering drive motor 4 is arranged upward and passes through the top plate 3. The steering transmission assembly is arranged on the upper end of the top plate 3. The steering drive motor 4 is connected to the movable rod 10 through the steering transmission assembly 5. The steering transmission assembly 5 includes two steering timing pulleys, specifically a large-diameter steering timing pulley and a small-diameter steering timing pulley. A horizontally arranged steering timing belt is mounted on the steering timing pulley. In this embodiment, the shaft hole of the large-diameter steering timing pulley has a spline, and the movable rod 10 is a splined shaft, so that when the large-diameter steering timing pulley rotates, the movable rod 10 can also rotate together without interfering with the movement of the movable rod 10 in the vertical direction.

[0034] The overall structure of the lifting driving assembly is that a lifting driving motor 6 is mounted on the support, the lifting driving motor 6 is connected with the movable rod 10 through a lifting transmission assembly 7, specifically, the lifting driving motor 6 and the lifting transmission assembly 7 are mounted on the vertical plate 2, wherein the lifting driving motor 6 is mounted on the end surface of the vertical plate 2 which faces away from the movable rod 10, and the lifting transmission assembly 7 is mounted on the end surface of the vertical plate 2 which faces the movable rod 10, the lifting transmission assembly 7 comprises two lifting synchronous pulleys which have the same diameter, a lifting synchronous belt is mounted on the lifting synchronous pulleys and arranged vertically, a connecting seat 11 is connected with the lifting synchronous belt, specifically, a fixed plate 14 is mounted on the connecting seat 11 through bolts, the fixed plate 14 clamps and fixes part of the lifting synchronous belt on the connecting seat 11, one end of the connecting seat 11 is provided with a through hole, the movable rod 10 is arranged in the through hole, the other end of the connecting seat 11 is provided with a sliding block 12, the vertical plate 2 is provided with a sliding rail 13, the sliding block 12 is mounted on the sliding rail 13, and the sliding block 12 and the sliding rail 13 are in sliding fit, which assists the movable rod 10 to make lifting movement.

[0035] As an embodiment, as shown in the figure, Figure 4 the connecting seat 11 of the embodiment is provided with a pin shaft 17, the movable rod 10 is provided with a groove 18, one end of the pin shaft 17 is arranged in the groove 18, the groove 18 is arc-shaped, the ends of the two sides of the groove 18 form steps on the movable rod 10, which are used for limiting the pin shaft 17, when the movable rod 10 makes up and down movement, the upper and lower ends of the groove 18 form steps on the movable rod 10, the pin shaft 17 contacts with the steps of the upper and lower ends in the movable rod 10, so that the movable rod 10 makes lifting movement together with the connecting seat 11, the pin shaft 17 can omit the currently used limiting sensor, bearing and other equipment, and the size of the connecting seat 11 is smaller.

[0036] As another embodiment, the connecting seat 11 is provided with a bearing, the movable rod 10 is connected with the inner periphery of the bearing, and the connection between the movable rod 10 and the connecting seat 11 is realized by interference fit between the movable rod 10 and the bearing.

[0037] The upper end of the movable rod 10 of the embodiment is a spline shaft, and the lower end of the movable rod 10 is a light rod shaft.

[0038] The embodiment generates damping in the descending direction, avoids the impact of the sample tube bottom end caused by the too fast speed of the suction needle 9 in the descending process, and is provided with the bottom plate 16 at the lower end of the movable rod 10. The damping assembly comprises the damping cylinder 15, the movable rod 10 is inserted into the damping cylinder 15, the bottom plate 16 is arranged in the damping cylinder 15, the diameter of the bottom plate 16 is larger than that of the movable rod 10, the damping cylinder 15 is fixed on the base 1 by bolts, and the damping body in the damping cylinder 15 can be water, oil or other fluids. Taking water as an example, the water partially fills the damping cylinder 15, i.e. the water in the damping cylinder 15 is not filled, the bottom plate 16 is in contact with the water, so that the descending movement of the movable rod 10 is stable and slow, and when the suction needle 9 is in contact with the bottom end of the sample tube, the damping effect can reduce the impact force of the suction needle 9 and the sample tube, thereby protecting the suction needle 9 and the sample tube.

[0039] As an embodiment, the diameter of the bottom plate 16 is slightly smaller than that of the cavity in the damping cylinder 15, a hole is formed in the bottom plate 16, the hole penetrates through the bottom plate 16, so that the water can flow through the hole of the bottom plate 16 and generate damping. In addition, the damping cylinder 15 of the embodiment is provided with a liquid inlet for adding water or oil into the damping cylinder 15.

[0040] The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0041] The above describes the specific embodiments of the present application in combination with the drawings, but is not used to limit the protection scope of the present application. Those skilled in the art should understand that various modifications or changes made on the basis of the technical solutions of the present application without creative labor are still within the protection scope of the present application.

Claims

1. A sample suction needle bottom touch protection device, characterized in that: It comprises a bracket and a damping assembly, the bracket is provided with a movable rod (10), the upper end of the movable rod (10) is provided with a connecting plate (8), the connecting plate (8) is provided with a suction needle (9), the bracket is provided with a steering drive motor (4) and a lifting drive motor (6), the steering drive motor (4) is connected with the movable rod (10) through a steering transmission assembly (5), and the lifting drive motor (6) is connected with the movable rod (10) through a lifting transmission assembly (7). The lower end of the movable rod (10) is provided with a bottom plate (16), the damping assembly comprises a damping cylinder (15), the lower end of the movable rod (10) is inserted into the damping cylinder (15), the bottom plate (16) is arranged in the damping cylinder (15), the diameter of the bottom plate (16) is smaller than the diameter of the inner cavity of the damping cylinder (15), and a damping body is arranged in the damping cylinder (15).

2. The sample suction needle bottom touch protection device according to claim 1, characterized in that: The bracket comprises a base (1), the base (1) is provided with a vertical plate (2), the upper end of the vertical plate (2) is provided with a top plate (3), the steering drive motor (4) is arranged at the lower end of the top plate (3), the steering transmission assembly is arranged at the upper end of the top plate (3), and the lifting drive motor (6) and the lifting transmission assembly (7) are arranged on the vertical plate (2).

3. The sample suction needle bottom touch protection device according to claim 2, characterized in that: The lifting transmission assembly (7) comprises two lifting synchronous pulleys, the lifting synchronous pulleys are provided with vertically arranged lifting synchronous belts, a connecting seat (11) is connected with the lifting synchronous belts, one end of the connecting seat (11) is provided with a through hole, the movable rod (10) is inserted into the through hole, the other end of the connecting seat (11) is provided with a sliding block (12), the vertical plate (2) is provided with a sliding rail (13), and the sliding block (12) is arranged on the sliding rail (13).

4. The sample suction needle bottom touch protection device according to claim 3, characterized in that: A pin shaft (17) is arranged on the connecting seat (11), a groove (18) is arranged on the movable rod (10), or a bearing is arranged on the connecting seat (11), and the movable rod (10) is connected with the inner circle of the bearing.

5. The sample suction needle bottom touch protection device according to claim 3, characterized in that: A fixed plate (14) is arranged on the connecting seat (11), and the fixed plate (14) fixes the lifting synchronous belts on the connecting seat (11).

6. The sample suction needle bottom touch protection device according to claim 2, characterized in that: The steering transmission assembly (5) comprises two steering synchronous pulleys, and the steering synchronous pulleys are provided with horizontally arranged steering synchronous belts.

7. The sample suction needle bottom touch protection device according to claim 6, characterized in that: A spline is arranged in the shaft hole of one steering synchronous pulley, and the movable rod (10) is a spline shaft.

8. The sample suction needle bottom touch protection device according to claim 2, characterized in that: The damping cylinder (15) is fixed on the base (1).

9. The sample suction needle bottoming protection device according to claim 8, characterized in that: The damping body fills part of the damping cylinder (15).

10. The sample suction needle bottoming protection device according to claim 8, characterized in that: The bottom plate (16) is provided with a hole.

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