Sample adding and sampling mechanical arm for biochemical analyzer

Abstract

The utility model provides a sample adding and sampling mechanical arm for a biochemical analyzer, which comprises a support frame body, a spline shaft, a spline nut, a rotary driving unit, a rotary transmission component, a lifting driving unit, a lifting transmission component and a connection guide component, by arranging a spline shaft, a spline nut, a rotary driving unit and a rotary transmission assembly, accurate movement of the mechanical arm in the Z-axis direction is achieved, and it is ensured that the mechanical arm can conduct more accurate and stable positioning and sampling operation; the spline shaft is rotatably sleeved with the connecting guide assembly, one end of the connecting guide assembly is fixedly connected to the lifting transmission assembly, the other end of the connecting guide assembly is arranged in the guide groove in a sliding mode, the rotation angle of the mechanical arm is not limited, 360-degree rotation can be achieved, and the operation flexibility of the mechanical arm is enhanced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biochemical analysis instrument, and particularly to a sample adding and taking mechanical arm for biochemical analysis instrument. BACKGROUND

[0002] In the biochemical analysis instrument, the mechanical arm as one of the core components is crucial for realizing high-precision sample taking, optimizing internal space arrangement of the instrument, and efficiently transferring the sample and reagent. In the traditional design, the Z-axis movement of the mechanical arm is usually completed by the cooperation of the linear guide rail and the two shaft sleeves for guiding and positioning, and the sliding friction mode is adopted between the shaft sleeve and the support rod. The cooperation between the two is gap cooperation, which leads to insufficient movement precision, and the movement precision of the Z-axis support rod is difficult to reach the optimal level, affecting the accuracy of the sample taking. Meanwhile, the Z-axis support rod is fixed at the slider of the linear guide rail, and when rotation in the Z-axis direction is needed, the linear guide rail limits the rotation angle, resulting in limited rotation angle and inability to realize 360° unobstructed rotation. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the above technical problems, the present application provides a sample adding and taking mechanical arm for biochemical analysis instrument, which comprises a support frame, a spline shaft, a spline nut, a rotary drive unit, a rotary transmission assembly, a lifting drive unit, a lifting transmission assembly, and a connecting guide assembly. The support frame comprises a top plate, a bottom plate, a first side plate and a second side plate arranged between the top plate and the bottom plate, and a guide groove extending along the spline shaft axis direction is formed on the second side plate. The spline shaft penetrates the top plate. The spline nut is sleeved on the spline shaft and is fixedly connected with the rotary transmission assembly. The rotary drive unit is arranged on the top plate, and its output end is in transmission connection with the rotary transmission assembly. The lifting drive unit and the lifting transmission assembly are both arranged on the first side plate and are in transmission connection. The connecting guide assembly is rotatably sleeved on the spline shaft, one end of which is fixedly connected with the lifting transmission assembly, and the other end is slidably arranged in the guide groove.

[0004] In some embodiments of the present application, the rotary transmission assembly comprises a first driving pulley, a first driven pulley and a first transmission belt. The first driving pulley is in transmission connection with the output end of the rotary drive unit. The first driven pulley is sleeved on the spline nut and is fixedly connected with the spline nut. The first transmission belt is sleeved on the first driving pulley and the first driven pulley.

[0005] In some embodiments of the present application, the lifting transmission assembly comprises a second driving pulley, a second driven pulley and a second transmission belt; the second driving pulley is in transmission connection with the output end of the lifting driving unit; the second driven pulley is arranged on the first side plate, and the extension direction of the line connecting the rotation centers of the second driven pulley and the second driving pulley is the same as the axial direction of the spline shaft; the second transmission belt is sleeved on the second driving pulley and the second driven pulley.

[0006] In some embodiments of the present application, the connecting guide assembly comprises a connecting guide body, a bearing and a roller; the connecting guide body is sleeved outside the bearing; the connecting guide body comprises a first connecting part and a second connecting part arranged at right angles; the first connecting part is fixedly connected with the second transmission belt; the second connecting part is fixedly connected with the roller; the roller is movably arranged in the guide groove.

[0007] In some embodiments of the present application, a loosening prevention assembly is further included, which is sleeved on the spline shaft and located below the connecting guide assembly.

[0008] In some embodiments of the present application, a reset assembly is further included; the reset assembly comprises a code disc, a position detection assembly and a reset detection assembly; the code disc is fixedly connected to the first driven pulley; the position detection assembly and the reset detection assembly are both fixedly connected to the top plate.

[0009] In some embodiments of the present application, along the circumferential direction of the code disc, the outer ring of the code disc is provided with a plurality of code teeth and menisci, the menisci are protrudingly arranged on the code teeth; an equal tooth spacing is formed between each of the code teeth.

[0010] In some embodiments of the present application, two limiting plates are further included, which are respectively arranged on the two sides of the position detection assembly.

[0011] In some embodiments of the present application, the rotary driving unit is a motor.

[0012] In some embodiments of the present application, the lifting driving unit is a motor.

[0013] Compared with the prior art, the biochemical analyzer sample adding and sampling mechanical arm has the following advantages and beneficial effects: the biochemical analyzer sample adding and sampling mechanical arm comprises a support frame body, a spline shaft, a spline nut, a rotary driving unit, a rotary transmission assembly, a lifting driving unit, a lifting transmission assembly and a connecting guide assembly, the spline shaft, the spline nut, the rotary driving unit and the rotary transmission assembly are arranged to realize accurate movement of the mechanical arm in the Z-axis direction, and ensure that the mechanical arm can be positioned and sample more accurately and stably; the connecting guide assembly is rotatably arranged on the spline shaft, one end of the connecting guide assembly is fixed to the lifting transmission assembly, and the other end of the connecting guide assembly is slidably arranged in the guide groove, the mechanical arm can be rotated by 360 degrees in the Z-axis direction without limitation, and the operation flexibility of the mechanical arm is improved.

[0014] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the present document. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings, which form a part of the present document, are used to provide a further understanding of the present document, and the illustrative embodiments thereof, and are not intended to limit the present document. In the drawings:

[0016] Figure 1 is a structural schematic view of a biochemical analyzer sample adding and sampling mechanical arm provided by an exemplary embodiment of the present application;

[0017] Figure 2 is a second angle structural schematic view of a biochemical analyzer sample adding and sampling mechanical arm provided by an exemplary embodiment of the present application;

[0018] Figure 3 is a top view of a biochemical analyzer sample adding and sampling mechanical arm provided by an exemplary embodiment of the present application.

[0019] In the drawings:

[0020] 10, support frame body; 101, top plate; 102, first side plate; 103, second side plate; 1031, guide groove; 104, bottom plate; 20, spline shaft; 30, spline nut; 40, rotary driving unit; 50, rotary transmission assembly; 60, lifting driving unit; 70, lifting transmission assembly; 80, connecting guide assembly; 801, connecting guide body; 802, roller; 90, anti-loosening assembly; 110, reset assembly; 1101, code tooth; 1102, meniscus; 1103, reset detection assembly; 1104, position detection assembly; 111, limiting plate. DETAILED DESCRIPTION

[0021] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort should fall within the protection scope of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other in any manner without conflict.

[0022] In a biochemical analysis instrument, a mechanical arm as one of core components is crucial for realizing high-precision sampling of samples, optimizing internal space arrangement of the instrument, and efficiently transferring the samples and reagents in space. In a traditional design, Z-axis movement of the mechanical arm is usually completed by cooperation of a linear guide rail and two shaft sleeves for guiding and positioning, and sliding friction is adopted between the shaft sleeves and the support rods. The cooperation between the shaft sleeves and the support rods is gap cooperation, which causes insufficient movement precision, and the movement precision of the Z-axis support rods is difficult to reach an optimal level, thereby affecting the accuracy of sampling. Meanwhile, one end of the Z-axis support rod is fixed on a slider of the linear guide rail, and when rotation in the Z-axis direction is needed, the linear guide rail limits the rotation angle, thereby causing the rotation angle to be limited and unable to realize 360° unobstructed rotation.

[0023] Therefore, based on this, the exemplary embodiments of the present application provide a biochemical analysis instrument sample adding and sampling mechanical arm, which comprises a support frame body, a spline shaft, a spline nut, a rotary driving unit, a rotary transmission assembly, a lifting driving unit, a lifting transmission assembly, and a connecting guide assembly. The spline shaft, the spline nut, the rotary driving unit, and the rotary transmission assembly are arranged to realize accurate movement of the mechanical arm in the Z-axis direction, so as to ensure that the mechanical arm can be positioned and sample more accurately and stably. The connecting guide assembly is rotatably sleeved on the spline shaft, one end of the connecting guide assembly is fixed on the lifting transmission assembly, and the other end of the connecting guide assembly is slidably arranged in a guide groove. The mechanical arm can realize 360° rotation without limitation in the Z-axis direction, thereby enhancing the operation flexibility of the mechanical arm.

[0024] The exemplary embodiments of the present application provide a biochemical analysis instrument sample adding and sampling mechanical arm, which comprises a support frame body, a spline shaft, a spline nut, a rotary driving unit, a rotary transmission assembly, a lifting driving unit, a lifting transmission assembly, and a connecting guide assembly. The spline shaft, the spline nut, the rotary driving unit, and the rotary transmission assembly are arranged to realize accurate movement of the mechanical arm in the Z-axis direction, so as to ensure that the mechanical arm can be positioned and sample more accurately and stably. The connecting guide assembly is rotatably sleeved on the spline shaft, one end of the connecting guide assembly is fixed on the lifting transmission assembly, and the other end of the connecting guide assembly is slidably arranged in a guide groove. The mechanical arm can realize 360° rotation without limitation in the Z-axis direction, thereby enhancing the operation flexibility of the mechanical arm. Figure 1 and 2As shown, the mechanical arm comprises a support frame body 10, a spline shaft 20, a spline nut 30, a rotary drive unit 40, a rotary transmission assembly 50, a lifting drive unit 60, a lifting transmission assembly 70, and a connecting guide assembly 80. The support frame body 10 comprises a top plate 101, a bottom plate 104, a first side plate 102 and a second side plate 103 arranged between the top plate 101 and the bottom plate 104. A guide groove 1031 extending along the axis direction of the spline shaft 20 is formed on the second side plate 103. The guide groove 1031 is in a strip shape and is used for accommodating the connecting guide assembly 80 so as to guide the lifting movement of the spline shaft 20. The spline shaft 20 penetrates through the top plate 101 and is connected with a sampling needle assembly at the top. The spline nut 30 is sleeved on the spline shaft 20 and is fixedly connected with the rotary transmission assembly 50. The rotary drive unit 40 is arranged on the top plate 101 and the output end thereof is in transmission connection with the rotary transmission assembly 50. Preferably, the rotary drive unit 40 is a motor and the rotary transmission assembly 50 comprises a first driving pulley, a first driven pulley and a first transmission belt. The first driving pulley is in transmission connection with the output end of the rotary drive unit 40. The first driven pulley is sleeved on the spline nut 30 and is fixedly connected with the spline nut 30. The first transmission belt is sleeved on the first driving pulley and the first driven pulley. In this way, under the driving of the rotary drive unit 40, the spline shaft 20 can drive the sampling needle assembly to rotate around the Z-axis, realizing the accurate movement in the Z-axis direction. The rotation of the spline shaft 20 is not limited and the mechanical arm can rotate by 360° in the Z-axis direction without limitation, greatly enhancing the operation flexibility of the mechanical arm and ensuring that the mechanical arm can be positioned and sampled more accurately and stably.

[0025] The lifting drive unit 60 and the lifting transmission assembly 70 are both arranged on the first side plate 102 and are in transmission connection. Preferably, the lifting drive unit 60 is a motor and the lifting transmission assembly 70 comprises a second driving pulley, a second driven pulley and a second transmission belt. The second driving pulley is in transmission connection with the output end of the lifting drive unit 60. The second driven pulley is arranged on the first side plate 102 and the extension direction of the connecting line of the rotation centers of the second driven pulley and the second driving pulley is the same as the axis direction of the spline shaft 20. The second transmission belt is sleeved on the second driving pulley and the second driven pulley. In this way, under the driving of the lifting drive unit 60, the spline shaft 20 can move up and down in the Z-axis direction.

[0026] As shown in the drawings, Figure 1As shown, the connecting guide assembly 80 is rotatably sleeved on the spline shaft 20, one end of which is fixedly connected to the lifting transmission assembly 70, and the other end is slidably arranged in the guide groove 1031. As an example, the connecting guide assembly 80 comprises a connecting guide body 801, a bearing, and a roller 802; the connecting guide body 801 is sleeved on the outside of the bearing; the connecting guide body 801 comprises a first connecting portion and a second connecting portion arranged at right angles; the first connecting portion is fixedly connected to the second transmission belt; the second connecting portion is fixedly connected to the roller 802; and the roller 802 is movably arranged in the guide groove 1031. When the lifting drive unit 60 drives the lifting transmission assembly 70 to move in the vertical direction, the second transmission belt can drive the spline shaft 20 to move up and down in the Z-axis direction, and at the same time, the roller 802 moves in the guide groove 1031 to guide the up and down movement of the spline shaft 20.

[0027] In an embodiment, continuing to refer to Figure 1 , the mechanical arm further comprises a loosening prevention assembly 90, which is sleeved on the spline shaft 20 and located below the connecting guide assembly 80, and can limit the connecting guide assembly 80 to prevent the connecting guide assembly 80 from loosening and separating from the spline shaft 20.

[0028] In an embodiment, as shown in Figure 2 and 3 , the mechanical arm further comprises a reset assembly 110; the reset assembly 110 comprises a code disc, a position detection assembly 1104, and a reset detection assembly 1103; the code disc is fixedly connected to the first driven pulley and can rotate with the first driven pulley; along the circumferential direction of the code disc, the outer ring of the code disc is provided with a plurality of code teeth 1101 and a meniscus 1102, the meniscus 1102 is arranged protruding from the code teeth 1101, i.e., the distance from the outer ring of the meniscus 1102 to the rotation center of the spline shaft 20 is greater than the distance from the outer ring of the code teeth 1101 to the rotation center of the spline shaft 20; and an equal tooth spacing is formed between each code tooth 1101. The position detection assembly 1104 and the reset detection assembly 1103 are both fixedly connected to the top plate 101, and both comprise a detection optocoupler; the detection optocoupler of the position detection assembly 1104 can identify and detect the number of code teeth 1101; and the detection optocoupler of the reset detection assembly 1103 is used to detect the meniscus 1102; as shown in Figure 3 , in the initial position, i.e., the state in which the mechanical arm is not working, one end of the meniscus 1102 is just within the detection range of the reset detection assembly 1103. When the rotary drive unit 40 drives the spline shaft 20 to rotate, the meniscus 1102 moves in the detection range of the reset detection assembly 1103, and the detection optocoupler of the reset detection assembly 1103 detects the movement of the meniscus 1102, and sends a signal to the controller 1000 to control the rotary drive unit 40 to stop rotating. Figure 3When rotating clockwise, the reset detection assembly 1103 can detect the presence of the meniscus 1102, at which time the reset detection assembly 1103 transmits a detection channel to the control system, and the control system learns that the spline shaft is rotating clockwise according to the received detection signal; while the reset detection assembly 1103 detects the meniscus 1102, the position detection assembly 1104 can detect the number of code teeth 1101 and transmit a detection signal to the control system, and the control system calculates the angle of rotation of the spline shaft 20 according to the number of code teeth 1101 rotating, so as to obtain the angle of reverse rotation required when resetting to the initial position. The number and spacing of the code teeth 1101 on the code disc can be adapted to different sampling scenarios, for example, when the sampling requires a large angle of rotation, more code teeth 1101 can be designed; when the sampling accuracy requirement is high, the spacing can be reduced.

[0029] In an embodiment, two limiting plates 111 are further included, and the two limiting plates 111 are respectively arranged on the two sides of the position detection assembly 1104, and the limiting plates 111 are used to block the meniscus 1102 to prevent the meniscus 1102 from colliding with the position detection assembly 1104. The position of the limiting plate 111 can be adjusted according to the angle of rotation required for sampling; in order to facilitate installation, the two limiting plates 111 can be integrally arranged.

[0030] In this application, the terms "comprising", "containing" or any other variant thereof are intended to cover non-exclusive inclusion, so that the articles or devices including a series of elements not only include those elements, but also include other elements not explicitly listed, or include elements inherent to such articles or devices. Without more limitations, the elements defined by the statement "comprising" do not exclude the presence of other identical elements in the articles or devices including the elements.

[0031] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0032] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application also intends to include these modifications and variations.

Claims

1. A sampling robotic arm for a biochemical analyzer, characterized in that, The device includes a support frame, a splined shaft, a splined nut, a rotary drive unit, a rotary transmission assembly, a lifting drive unit, a lifting transmission assembly, and a connecting guide assembly. The support frame includes a top plate, a bottom plate, and a first side plate and a second side plate disposed between the top plate and the bottom plate. A guide groove extending along the axis of the splined shaft is formed on the second side plate. The splined shaft passes through the top plate. The splined nut is sleeved on the splined shaft and fixedly connected to the rotary transmission assembly. The rotary drive unit is disposed on the top plate, and its output end is drively connected to the rotary transmission assembly. The lifting drive unit and the lifting transmission assembly are both disposed on the first side plate and drively connected. The connecting guide assembly is rotatably sleeved on the splined shaft, with one end fixedly connected to the lifting transmission assembly and the other end slidably disposed in the guide groove.

2. The sampling robotic arm for a biochemical analyzer according to claim 1, characterized in that, The rotary transmission assembly includes a first driving pulley, a first driven pulley, and a first conveyor belt; the first driving pulley is connected to the output end of the rotary drive unit; the first driven pulley is sleeved on the spline nut and fixedly connected to the spline nut; the first conveyor belt is sleeved on the first driving pulley and the first driven pulley.

3. The sampling robotic arm for a biochemical analyzer according to claim 1, characterized in that, The lifting transmission assembly includes a second driving pulley, a second driven pulley, and a second conveyor belt; the second driving pulley is connected to the output end of the lifting drive unit; the second driven pulley is disposed on the first side plate, and the extension direction of the line connecting the rotation centers of the second driven pulley and the second driving pulley is the same as the axial direction of the spline shaft; the second conveyor belt is sleeved on the second driving pulley and the second driven pulley.

4. The sampling robotic arm for a biochemical analyzer according to claim 3, characterized in that, The connecting guide assembly includes a connecting guide body, a bearing, and a roller; the connecting guide body is sleeved on the outside of the bearing; the connecting guide body includes a first connecting part and a second connecting part arranged at right angles; the first connecting part is fixedly connected to a second conveyor belt; the second connecting part is fixedly connected to the roller; the roller is movably disposed in the guide groove.

5. The sampling robotic arm for a biochemical analyzer according to claim 1, characterized in that, It also includes an anti-loosening component, which is sleeved on the spline shaft and located below the connecting guide component.

6. The sampling robotic arm for a biochemical analyzer according to claim 2, characterized in that, It also includes a reset component; the reset component includes a code disk, a position detection component and a reset detection component; the code disk is fixed to the first passive pulley; the position detection component and the reset detection component are both fixed to the top plate.

7. The sampling robotic arm for a biochemical analyzer according to claim 6, characterized in that, Along the circumferential direction of the code disk, the outer ring of the code disk is provided with a plurality of code teeth and a meniscus, the meniscus protruding from the code teeth; and each code tooth forms an equal tooth pitch.

8. The sampling robotic arm for a biochemical analyzer according to claim 6, characterized in that, It also includes two limiting plates, which are respectively disposed on both sides of the position detection component.

9. The sampling robotic arm for a biochemical analyzer according to claim 1, characterized in that, The rotary drive unit is a motor.

10. The sampling robotic arm for a biochemical analyzer according to claim 1, characterized in that, The lifting drive unit is a motor.

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