Rocker arm sample adding module

Abstract

The utility model discloses a rocker arm sample adding module, which belongs to experimental instruments and comprises a Z-direction track, a rocker arm sample adding assembly and a rocker arm motor are mounted on the Z-direction track, the rocker arm sample adding assembly comprises a spline shaft and a sample adding head, and the rocker arm motor is connected with the spline shaft through a rocker arm synchronous belt assembly. Through rocker arm sample adding of the rocker arm sample adding assembly, reagents placed in batches can be continuously sucked, and beam guide rails do not need to be laid like a traditional XYZ axis sample adding structure, so that the space utilization rate is higher, and the problem that in the prior art, a sample adding module performs sample adding through guide rails in the X direction, the Y direction and the Z direction, and consequently the occupied space is large is solved.

Description

Technical Field

[0001] The utility model relates to an experimental instrument, in particular to a swing arm sample adding module. Background Art

[0002] Most of the current instrument sample adding methods adopt the movement mode in three directions of X, Y, and Z. Although such an operation mode is flexible and convenient, and the sample adding needle can move to each position point within the XY interval. However, in order to achieve the movement in the X and Y directions, it is necessary to lay cross beams, X-direction guide rails, Y-direction guide rails and other necessary mechanical parts on the instrument, resulting in the entire sample adding module being huge and bulky. And the huge and bulky sample adding module will squeeze the space of the other modules on the instrument, making the instrument become huge and the space utilization rate decrease.

[0003] For example, in the "an automatic sample adding mechanism" disclosed in the Chinese patent document, with the publication number of CN203133097U, a belt transmission mechanism driven by a motor and transmitting in the X direction is arranged on the X-direction guide rail, the Y-direction guide rail is fixed on the conveyor belt of the belt transmission mechanism, a belt transmission mechanism driven by a motor and transmitting in the Y direction is arranged on the Y-direction guide rail, the sample adding arm fixing seat is fixed on the conveyor belt of the belt transmission mechanism, a sample adding arm telescoping in the Z direction is arranged on the sample adding arm fixing seat, the sample adding arm includes an upper arm and a lower arm, and the upper arm and the lower arm are connected through a gear rack transmission mechanism, and the gear of the gear rack transmission mechanism is connected with a motor for driving the gear to rotate. The disadvantage of this patent is that since it controls the sample adding through the movement in three directions of X, Y, and Z, it is necessary to lay cross beam guide rails in a large range, resulting in a decrease in space utilization rate. Summary of the Utility Model

[0004] The utility model aims to overcome the problem that in the prior art, the sample adding module uses guide rails in three directions of X, Y, and Z for sample adding, resulting in a large occupied space, and provides a swing arm sample adding module, which optimizes the movement form of the sample adding module and saves the occupied space.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a swing arm sample adding module, which includes a Z-direction track, on which a swing arm sample adding component and a swing arm motor are installed. The swing arm sample adding component includes a spline shaft and a sample adding head, and the swing arm motor is connected with the spline shaft through a swing arm synchronous belt component.

[0007] In this application, through the swing arm sample adding of the swing arm sample adding component, continuous suction of a batch of placed reagents can be carried out, and moreover, it does not need to lay cross beam guide rails like the traditional XYZ-axis sample adding structure, so the space utilization rate is higher. The spline shaft plays a role in transmitting between the motor and the swing arm sample adding component.

[0008] Preferably, a spline bearing sleeve is mounted on the spline shaft. The rocker arm synchronous belt assembly includes a first synchronous belt pulley mounted on the output shaft of the rocker arm motor, a second synchronous belt pulley mounted on the spline bearing sleeve, and a rocker arm synchronous belt mounted between the first synchronous belt pulley and the second synchronous belt pulley. The transmission from the rocker arm motor to the spline shaft is achieved through the rocker arm synchronous belt assembly, which has high reliability.

[0009] Preferably, an upper bearing seat adapted to the spline shaft is mounted at the upper end of the Z-direction track. The spline shaft can be horizontally limited by the upper bearing seat, improving its stability and avoiding shaking.

[0010] Preferably, a Z-direction transmission assembly is mounted on the Z-direction track. The Z-direction transmission assembly includes a Z-direction motor and a Z-direction synchronous belt assembly. The Z-direction transmission is achieved through this structure, enabling the sampling head to lift and lower to suck reagents and sample.

[0011] Preferably, a fixed synchronous belt pulley is mounted on the Z-direction track. The Z-direction synchronous belt assembly includes a third synchronous belt pulley mounted on the output shaft of the Z-direction motor, and a Z-direction synchronous belt mounted between the fixed synchronous belt pulley and the third synchronous belt pulley. The Z-direction transmission reliability can be improved through the Z-direction synchronous belt assembly.

[0012] Preferably, a Z-direction slider is mounted on the Z-direction track. One end of the spline shaft is mounted on the Z-direction slider. The Z-direction slider includes a clamping plate structure for clamping the Z-direction synchronous belt. The transmission between the Z-direction motor and the Z-direction slider can be achieved through this structure.

[0013] Preferably, a stroke limit block is further mounted on the Z-direction slider, and a limit ejector rod is mounted on the Z-direction track.

[0014] Preferably, the present application further includes a reagent table. A plurality of reagent bins are provided on the reagent table, and the plurality of reagent bins are arranged in an arc shape. The reagent table arranged in an arc shape can facilitate the sampling by the rocker arm sampling assembly.

[0015] Preferably, a reaction position and a steel needle cleaning position are further provided on the reagent table, and both the reaction position and the steel needle cleaning position are on the same arc line as the plurality of reagent bins.

[0016] Preferably, a turntable is further mounted on the reagent table, and the plurality of reagent bins are located on the turntable. By rotating the turntable, the reagent bins can be moved away from below the rocker arm sampling structure, facilitating the operator to replace or add reagents.

[0017] Therefore, the utility model has the following beneficial effects: (1) Through the pipetting of the rocker pipetting component, the reagents placed in batches can be continuously aspirated. Moreover, it does not need to lay crossbeam guides like the traditional XYZ-axis pipetting structure, so the space utilization rate is higher; (2) The transmission is reliable; (3) It is convenient to clean the steel needle; (4) It is convenient to replace and add reagents. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a front view structural schematic diagram of the utility model.

[0019] Figure 2 is a side view structural schematic diagram of the utility model.

[0020] Figure 3 is a top view structural schematic diagram of a reagent table according to Embodiment 2 of the utility model.

[0021] Figure 4 is a top view structural schematic diagram of a reagent table according to Embodiment 3 of the utility model.

[0022] In the figure: base 1, vertical mounting seat 2, Z-direction track 3, Z-direction synchronous belt assembly 4, Z-direction slider 5, stroke limit block 6, limit ejector rod 7, rocker motor 8, Z-direction motor 9, spline shaft 10, pipetting head 11, rocker synchronous belt assembly 12, upper end bearing seat 13, lower end bearing seat 14, turntable 15, reaction position 16, cleaning position 17. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The following further describes the utility model in conjunction with the drawings and the detailed description of the embodiments.

[0024] Embodiment 1, as shown in Figure 1-2As shown in the figure, a rocker arm sampling module includes a base, on which a vertical mounting seat is installed. A Z-axis rail and a Z-axis drive assembly are installed on the vertical mounting seat. The Z-axis drive assembly includes a Z-axis motor and a Z-axis synchronous belt assembly. The Z-axis motor is installed perpendicular to the vertical mounting seat, and the bottom of the Z-axis motor is installed on the base and supported by the base. The direction of the Z-axis rail is vertical. A fixed synchronous pulley is installed on the Z-axis rail. The Z-axis synchronous belt assembly includes a third synchronous pulley installed on the output shaft of the Z-axis motor, and a Z-axis synchronous belt installed between the fixed synchronous pulley and the third synchronous pulley. The reliability of transmission can be improved through the synchronous belt structure. A Z-axis slider is installed on the Z-axis rail. The Z-axis slider includes a clamping plate structure for clamping the Z-axis synchronous belt. After the clamping plate structure clamps the Z-axis synchronous belt, the Z-axis slider can move together with the Z-axis synchronous belt. When the Z-axis motor rotates in different directions, the Z-axis slider can be controlled to slide up or down respectively. A travel limit block is also installed on the Z-axis slider, and a limit ejector rod is installed on the Z-axis rail. The limit ejector rod is used to limit the Z-axis slider and also limit the sampling head. When the Z-axis slider moves up to collide with the travel limit block and the limit ejector rod, it stops moving further. The position after the upward movement of the sampling head is controlled by this structure.

[0025] A rocker arm motor and a rocker arm sampling assembly are also installed on the vertical mounting seat. The rocker arm sampling assembly includes a spline shaft and a sampling head. The rocker arm motor is connected to the spline shaft through a rocker arm synchronous belt assembly. A motor mounting flange is installed on the rocker arm motor, and the motor mounting flange is installed on the vertical mounting seat and is located on the other side of the Z-axis rail.

[0026] A spline bearing sleeve is installed on the spline shaft. The rocker arm synchronous belt assembly includes a first synchronous pulley installed on the output shaft of the rocker arm motor, a second synchronous pulley installed on the spline bearing sleeve, and a rocker arm synchronous belt installed between the first synchronous pulley and the second synchronous pulley.

[0027] A lower end bearing seat is also installed on the Z-axis slider. The lower end of the spline shaft is installed in the lower end bearing seat. An upper end bearing seat is installed at the upper end of the vertical mounting seat, and the spline shaft passes through the upper end bearing seat. The stability of the spline shaft is improved by limiting it at multiple positions by the lower end bearing seat and the upper end bearing seat at the same time.

[0028] A rocker arm is installed at the upper end of the spline shaft. The rocker arm is a cantilever structure relative to the spline shaft, and a sampling head is installed below the side of the rocker arm that is farther from the spline shaft.

[0029] During use, the rotation of the rocker arm motor drives the rocker arm synchronous belt assembly, and then the rocker arm synchronous belt assembly drives the spline shaft to rotate, thereby causing the sampling head to move along an arc trajectory to align with the sampling cup that needs to be sampled. Then, the rotation of the Z-axis motor drives the Z-axis synchronous belt assembly, and the sampling head moves downward through the Z-axis slider and extends into the reagent cup. After sampling, the Z-axis motor rotates in the reverse direction to withdraw the sampling head from the reagent cup. Then, the sampling head is controlled by the rocker arm motor to move horizontally to the reaction cup for sample addition again.

[0030] Embodiment 2, as Figure 3 shown, a rocker arm sampling module includes a base and a reagent table. The base is installed on the reagent table. A vertical mounting seat is installed on the base. A Z-axis track and a Z-axis transmission assembly are installed on the vertical mounting seat. The Z-axis transmission assembly includes a Z-axis motor and a Z-axis synchronous belt assembly. The Z-axis motor is installed perpendicular to the vertical mounting seat, and the bottom of the Z-axis motor is installed on the base and supported by the base. The direction of the Z-axis track is vertical. A fixed synchronous pulley is installed on the Z-axis track. The Z-axis synchronous belt assembly includes a third synchronous pulley installed on the output shaft of the Z-axis motor and a Z-axis synchronous belt installed between the fixed synchronous pulley and the third synchronous pulley. The synchronous belt structure can improve the reliability of transmission. A Z-axis slider is installed on the Z-axis track. The Z-axis slider includes a clamping plate structure for clamping the Z-axis synchronous belt. After the clamping plate structure clamps the Z-axis synchronous belt, the Z-axis slider can move together with the Z-axis synchronous belt. When the Z-axis motor rotates in different directions, it can control the Z-axis slider to slide up or down respectively. A stroke limit block is also installed on the Z-axis slider, and a limit ejector rod is installed on the Z-axis track. The limit ejector rod is used to limit the Z-axis slider and also limit the sampling head. When the Z-axis slider moves upward until the stroke limit block collides with the limit ejector rod, it stops moving further. The position of the sampling head after moving upward is controlled by this structure.

[0031] A rocker arm motor and a rocker arm sampling assembly are also installed on the vertical mounting seat. The rocker arm sampling assembly includes a spline shaft and a sampling head. The rocker arm motor is connected to the spline shaft through a rocker arm synchronous belt assembly. A motor mounting flange is installed on the rocker arm motor, and the motor mounting flange is installed on the vertical mounting seat and is located on the other side of the Z-axis track.

[0032] A spline bearing sleeve is installed on the spline shaft. The rocker arm synchronous belt assembly includes a first synchronous pulley installed on the output shaft of the rocker arm motor, a second synchronous pulley installed on the spline bearing sleeve, and a rocker arm synchronous belt installed between the first synchronous pulley and the second synchronous pulley.

[0033] A lower bearing seat is also installed on the Z-direction slider. The lower end of the spline shaft is installed on the lower bearing seat. An upper bearing seat is installed at the upper end of the vertical mounting seat, and the spline shaft passes through the upper bearing seat. The spline shaft is limited at multiple positions by the lower bearing seat and the upper bearing seat simultaneously, improving its stability.

[0034] A rocker arm is installed at the upper end of the spline shaft. The rocker arm is a cantilever structure relative to the spline shaft, and a sampling head is installed below the side of the rocker arm that is farther away from the spline shaft.

[0035] A plurality of reagent compartments located below the sampling head are arranged in an arc shape on the reagent table. The positions of the reagent compartments correspond to the movement trajectory of the sampling head up and down. The reagent compartments are used to hold reagent cups, so that the sampling head can take samples from the reagent cups.

[0036] A turntable is also installed on the reagent table. The plurality of reagent compartments are located on the turntable. The turntable can rotate relative to the reagent table. When it is necessary to replace or add reagents, the position of the reagent compartment can be changed by rotating the turntable so that it moves away from below the sampling head, avoiding collision with the sampling head during the process of replacing or adding reagents.

[0037] During use, the rotation of the rocker arm motor drives the rocker arm synchronous belt assembly, and then the rocker arm synchronous belt assembly drives the spline shaft to rotate, so that the sampling head moves along an arc trajectory to align with the sampling cup required for sampling. Then, the rotation of the Z-direction motor drives the Z-direction synchronous belt assembly, and then the sampling head moves downward through the Z-direction slider and extends into the reagent cup. After sampling, the Z-direction motor rotates in the reverse direction to make the sampling head withdraw from the reagent cup. Then, the sampling head is controlled by the rocker arm motor to move horizontally to the reaction cup for sample addition again.

[0038] Example three, as Figure 4As shown in the figure, a rocker pipetting module includes a base and a reagent table. The base is installed on the reagent table. A vertical mounting seat is installed on the base. A Z-axis rail and a Z-axis transmission component are installed on the vertical mounting seat. The Z-axis transmission component includes a Z-axis motor and a Z-axis synchronous belt component. The Z-axis motor is installed perpendicular to the vertical mounting seat, and the bottom of the Z-axis motor is installed on the base and supported by the base. The direction of the Z-axis rail is vertical. A fixed synchronous pulley is installed on the Z-axis rail. The Z-axis synchronous belt component includes a third synchronous pulley installed on the output shaft of the Z-axis motor, and a Z-axis synchronous belt installed between the fixed synchronous pulley and the third synchronous pulley. The reliability of transmission can be improved through the synchronous belt structure. A Z-axis slider is installed on the Z-axis rail. The Z-axis slider includes a clamping plate structure for clamping the Z-axis synchronous belt. After the clamping plate structure clamps the Z-axis synchronous belt, the Z-axis slider can move together with the Z-axis synchronous belt. When the Z-axis motor rotates in different directions, the Z-axis slider can be controlled to slide up or down respectively. A stroke limit block is also installed on the Z-axis slider, and a limit ejector rod is installed on the Z-axis rail. The limit ejector rod is used to limit the Z-axis slider and also limit the pipetting head. When the Z-axis slider moves up to collide with the stroke limit block and the limit ejector rod, it stops moving further. The position of the pipetting head after moving up is controlled by this structure.

[0039] A rocker motor and a rocker pipetting component are also installed on the vertical mounting seat. The rocker pipetting component includes a spline shaft and a pipetting head. The rocker motor and the spline shaft are connected through a rocker synchronous belt component. A motor mounting flange is installed on the rocker motor. The motor mounting flange is installed on the vertical mounting seat and is located on the other side of the Z-axis rail.

[0040] A spline bearing sleeve is installed on the spline shaft. The rocker synchronous belt component includes a first synchronous pulley installed on the output shaft of the rocker motor, a second synchronous pulley installed on the spline bearing sleeve, and a rocker synchronous belt installed between the first synchronous pulley and the second synchronous pulley.

[0041] A lower end bearing seat is also installed on the Z-axis slider. The lower end of the spline shaft is installed in the lower end bearing seat. An upper end bearing seat is installed at the upper end of the vertical mounting seat. The spline shaft passes through the upper end bearing seat. The stability of the spline shaft is improved by limiting it at multiple positions by the lower end bearing seat and the upper end bearing seat simultaneously.

[0042] A rocker is installed at the upper end of the spline shaft. The rocker is a cantilever structure relative to the spline shaft. A pipetting head is installed below the side of the rocker that is farther away from the spline shaft.

[0043] A plurality of reagent reservoirs are provided on the reagent table below the pipetting head. The plurality of reagent reservoirs are arranged in an arc shape. The positions of the reagent reservoirs correspond to the movement trajectory of the pipetting head up and down. The reagent reservoirs are used to hold reagent cups so that the pipetting head can sample from the reagent cups.

[0044] A turntable is also installed on the reagent table. The plurality of reagent reservoirs are located on the turntable. The turntable can rotate relative to the reagent table. When it is necessary to replace or add reagents, the turntable can be rotated to change the position of the reagent reservoir so that it moves away from below the pipetting head, avoiding collision with the pipetting head during the process of replacing or adding reagents.

[0045] During use, the rotation of the rocker arm motor drives the rocker arm synchronous belt assembly, and then the rocker arm synchronous belt assembly drives the spline shaft to rotate, thereby causing the pipetting head to move along an arc trajectory to align with the pipetting cup for sampling. Then, the rotation of the Z-axis motor drives the Z-axis synchronous belt assembly, and then the pipetting head moves downward through the Z-axis slider and extends into the reagent cup. After sampling, the Z-axis motor rotates in the reverse direction to withdraw the pipetting head from the reagent cup. Then, the pipetting head is again controlled by the rocker arm motor to move horizontally to the reaction cup for pipetting.

[0046] A reaction position and a steel needle cleaning position are also provided on the reagent table. The reaction position and the steel needle cleaning position are both on the same arc line as the plurality of reagent reservoirs. A reaction cup is placed at the reaction position for reacting the sampled reagents after mixing. A cleaning seat is provided at the steel needle cleaning position.

[0047] Connectors are installed on the side and below the cleaning seat for connecting hoses. The pipeline control of the pipetting head is completed by two pumps. Among them, the plunger pump controls pipetting, and the pipetting diaphragm pump controls cleaning. The pipeline switching is controlled by an electromagnetic valve. Usually during pipetting, the electromagnetic valve closes the pipeline connected to the pipetting diaphragm pump and opens the pipeline connected to the plunger pump to achieve liquid suction and dispensing of the steel needle with the plunger pump. When the steel needle needs to be cleaned, the electromagnetic valve connects the pipeline of the pipetting diaphragm pump and closes the pipeline of the plunger pump, so that the cleaning liquid can flow out of the needle to clean the inner wall of the steel needle. A cleaning diaphragm pump is also connected to the side of the cleaning seat through a pipeline to clean the outer wall of the steel needle. A double-headed diaphragm pump is connected to the lower side of the cleaning seat to suck out the waste liquid after cleaning. When cleaning, insert the steel needle into the cleaning seat and open the electromagnetic valve to connect the pipeline of the pipetting diaphragm pump. At the same time, turn on the pipetting diaphragm pump, the cleaning diaphragm pump, and the double-headed diaphragm pump to form a three-injection and one-suction to complete the cleaning of the steel needle.

Claims

1. A rocker arm sample adding module, characterized in that: It comprises a Z-direction track, on which a rocker arm sample loading assembly and a rocker arm motor are installed. The rocker arm sample loading assembly comprises a spline shaft and a sample loading head, and the rocker arm motor is connected to the spline shaft through a rocker arm synchronous belt assembly.

2. A rocker arm sample loading module according to claim 1, characterized in that: A spline bearing sleeve is installed on the spline shaft, and the rocker arm synchronous belt assembly includes a first synchronous pulley installed on the output shaft of the rocker arm motor, a second synchronous pulley installed on the spline bearing sleeve, and a rocker arm synchronous belt installed between the first synchronous pulley and the second synchronous pulley.

3. A rocker arm sample loading module according to claim 2, characterized in that: An upper end bearing seat adapted to the spline shaft is installed at the upper end of the Z-direction track.

4. A rocker arm sample loading module according to claim 1, characterized in that: A Z-direction transmission assembly is installed on the Z-direction track, and the Z-direction transmission assembly includes a Z-direction motor and a Z-direction synchronous belt assembly.

5. A rocker arm sample loading module according to claim 4, characterized in that: A fixed synchronous pulley is installed on the Z-direction track, and the Z-direction synchronous belt assembly includes a third synchronous pulley installed on the output shaft of the Z-direction motor, and a Z-direction synchronous belt installed between the fixed synchronous pulley and the third synchronous pulley.

6. The rocker arm sample loading module according to claim 1, characterized in that: A Z-direction slider is installed on the Z-direction track, one end of the spline shaft is installed on the Z-direction slider, and the Z-direction slider includes a clamping plate structure for clamping the Z-direction synchronous belt.

7. A rocker arm sample loading module according to claim 6, characterized in that: A travel limit block is also installed on the Z-direction sliding block, and a limit push rod is installed on the Z-direction track.

8. A rocker arm sample loading module according to any one of claims 1 to 7, characterized in that: It also includes a reagent table, on which a plurality of reagent chambers are arranged in a circular arc shape.

9. A rocker arm sample loading module according to claim 8, characterized in that: The reagent table is also provided with a reaction position and a steel needle cleaning position, and the reaction position and the steel needle cleaning position are both located on the same arc line with the plurality of reagent chambers.

10. The rocker arm sample loading module according to claim 8, characterized in that: A turntable is also installed on the reagent table, and the plurality of reagent chambers are located on the turntable.

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