CN210108776U - Vertical drive mechanism for driving movement of sampling needle of sampling device - Google Patents
Vertical drive mechanism for driving movement of sampling needle of sampling device Download PDFInfo
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- CN210108776U CN210108776U CN201920398775.7U CN201920398775U CN210108776U CN 210108776 U CN210108776 U CN 210108776U CN 201920398775 U CN201920398775 U CN 201920398775U CN 210108776 U CN210108776 U CN 210108776U
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Abstract
The utility model relates to a vertical drive mechanism for driving sampling needle motion of sampling device, including perpendicular transmission assembly, the perpendicular main arm and the carrier assembly of connection on perpendicular transmission assembly, this carrier assembly and perpendicular main arm fixed connection for in the drive sampling needle vertical motion in-process application of force in the sampling needle. The utility model discloses an among the full-automatic sample analyzer that vertical drive mechanism and sampling device were applied to, through the linkage of carrier assembly, realized horizontal drive and vertical drive subassembly's linkage, simplified the product structure to reduce motor power's setting, reduced the energy consumption in the product sampling process simultaneously.
Description
Technical Field
The utility model relates to the field of medical equipment, especially relate to full-automatic sample analyzer of analysis liquid sample and be used for the sampling device on this analyzer to and be used for the sampling device to make its vertical motion's vertical drive mechanism.
Background
The following background is provided to aid the reader in understanding the present invention and is not admitted to be prior art.
Fully automatic sample analyzers have been widely used in the field of medical testing, for example, in analyzing blood samples and analyzed components in urine samples with these analyzers, in blood cell analysis, blood collection needs to be achieved through a sampling needle, and the sampling needle uses a transmission mechanism to achieve movement in both horizontal and vertical directions.
For example, chinese patent CN200620054318.9 discloses a two-degree-of-freedom sampling mechanism, which includes a base, a lifting power component, a deflection power component, a synchronous belt, a lifting connecting component, a sampling needle sliding block assembly, a deflection connecting component, a guide shaft, and a deflection shaft, wherein the lifting power component and the deflection power component are mounted on the base, the synchronous belt is vertically mounted on the base through a synchronous belt pulley, the synchronous belt pulley is linked with the lifting power component, the lifting connecting component is fixed on the synchronous belt and linked with the sampling needle sliding block assembly, the deflection connecting component is linked with the deflection power component, the guide shaft and the deflection shaft are vertically mounted between the sampling needle sliding block assembly and the deflection connecting component, and the sampling needle sliding block assembly is movably sleeved on the guide shaft and the deflection shaft. The sampling needle sliding block component is driven by the synchronous belt to vertically lift along the guide shaft. The patented technique does not enable horizontal movement of the sampling needle.
The sampling device of the existing full-automatic sample analyzer also has the advantages that the sampling can be completed only by using a motor with higher power, the cost of the analyzer is high, the sampling time consumption is long, the installation precision requirement is high, the production efficiency is low, the repair rate in the using process is high, and the like, and the improvement is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at first providing a vertical drive mechanism, the sampling needle vertical motion that can low-power and efficient drive sampling device.
Specifically, the utility model discloses a following technical scheme realizes:
the vertical driving mechanism for driving the sampling needle of the sampling device to move comprises a vertical transmission assembly, a vertical main arm connected to the vertical transmission assembly and a bearing assembly, wherein the bearing assembly is fixedly connected with the vertical main arm and is used for applying force to the sampling needle in the process of driving the sampling needle to move vertically.
When the vertical driving mechanism drives the vertical main arm to move upwards, the bearing component is driven by the vertical main arm to move upwards, and the bearing component bears the load through an upward force and pushes the sampling needle to move upwards. When the vertical driving mechanism drives the vertical main arm to do vertical motion downwards, the bearing component is driven by the vertical main arm to move downwards, so that downward force is generated to bear and draw the sampling needle to move downwards; meanwhile, the dead weight of the sampling needle and the bearing component is increased, the downward force is increased, and the sampling needle is more favorable for puncturing the sample bin.
In a preferred embodiment, the bearing component comprises a horizontal guide groove and a roller, and the roller is positioned in the horizontal guide groove; the horizontal guide groove is fixedly connected with the vertical main arm; the roller is connected with the sampling needle. In some specific embodiments, the roller and the sampling needle are connected by a sampling needle holder.
In a preferred embodiment, the bearing assembly comprises a horizontal guide shaft and a linear bearing, wherein the linear bearing is sleeved on the horizontal guide shaft; the horizontal guide shaft is fixedly connected with the vertical main arm; the linear bearing is connected with the sampling needle. In some specific embodiments, the linear bearing and the sampling needle are connected by a sampling needle holder.
In a preferred embodiment, the vertical transmission assembly comprises a motor, a rotating shaft, a first transmission wheel connected with the motor and a first rotating shaft wheel connected with the rotating shaft; the number of teeth of the first rotating shaft wheel is larger than that of the first transmission wheel.
In a preferred embodiment, the vertical transmission assembly further comprises a second rotating shaft wheel connected to the other end of the rotating shaft, a synchronous pulley, a first synchronous belt positioned on the first transmission wheel and the first rotating shaft wheel, and a second synchronous belt positioned on the second rotating shaft wheel and the synchronous pulley; the vertical main arm is connected to the second synchronous belt.
In a preferred embodiment, the vertical transmission assembly further comprises a first linear guide pair, and the vertical main arm is connected with the first linear guide pair.
On the other hand, the utility model also provides a sampling device, include the utility model discloses a vertical drive mechanism, carrier assembly make the motion that the needle can realize level and two perpendicular directions of sampling, are that the device structure is simplified and reduce the energy consumption.
Specifically, the utility model discloses a sampling device for analyzing analysis appearance of liquid sample for the analysis appearance of analysis liquid sample, include
The sampling needle is fixed on the sampling needle fixing seat;
a base;
the horizontal driving mechanism is positioned on the base and comprises a bracket and a horizontal transmission component connected with the bracket;
the sampling needle fixing seat is slidably connected with a third linear guide pair arranged on the bracket;
the vertical driving mechanism is positioned on the base and comprises a vertical main arm and a vertical transmission assembly connected with the vertical main arm;
the bearing assembly is fixedly connected with the vertical main arm; the bearing component applies force to the sampling needle and the sampling needle fixing seat in the process of driving the sampling needle to vertically move; and the bearing assembly bears and guides the sampling needle and the sampling needle fixing seat to move horizontally in the process of driving the sampling needle to move horizontally.
Wherein, the horizontal driving mechanism drives the needle fixing seat and the sampling needle to do horizontal linear motion. The vertical driving mechanism drives the needle fixing seat and the sampling needle to do vertical linear motion.
When the vertical driving mechanism drives the vertical main arm to move upwards, the bearing component is driven by the vertical main arm to move upwards, and the bearing component bears the load through an upward force and pushes the sampling needle fixing seat and the sampling needle to move upwards. When the vertical driving mechanism drives the vertical main arm to do vertical motion downwards, the bearing component is driven by the vertical main arm to move downwards, and generates downward force to bear and pull the sampling needle fixing seat and the sampling needle to move downwards; simultaneously, because bearing assembly is connected with the sampling needle fixing base, increased the dead weight, increased decurrent power, more be favorable to the puncture of sampling to the sample storehouse.
In a preferred embodiment, the bearing component comprises a horizontal guide groove and a roller; the horizontal guide groove is fixedly connected with the vertical main arm; the roller is fixed on the sampling needle fixing seat and is positioned in the horizontal guide groove; when the bracket is moved horizontally, the horizontal guide groove bears the roller in the vertical direction and guides the sampling needle fixing seat and the sampling needle to move horizontally; when the vertical main arm is vertically moved, the horizontal guide groove fixed on the vertical main arm and the roller positioned in the horizontal guide groove vertically move, and the roller bears the sampling needle fixing seat and the sampling needle and vertically moves along the third linear guide pair.
In a preferred embodiment, the bearing assembly comprises a horizontal guide shaft and a linear bearing; the horizontal guide shaft is fixedly connected with the vertical main arm; the linear bearing is fixed on the sampling needle fixing seat; the linear bearing is sleeved on the horizontal guide shaft; when the support is moved horizontally, the linear bearing bears the sampling needle fixing seat and slides on the horizontal guide shaft to drive the sampling needle fixing seat and the sampling needle to move horizontally; when the vertical main arm is vertically moved, the horizontal guide shaft fixed on the vertical main arm and the linear bearing sleeved on the horizontal guide shaft vertically move, and the linear bearing carries the sampling needle fixing mechanism and the sampling needle and vertically moves along the third linear guide pair.
In a preferred embodiment, the vertical transmission assembly comprises a motor and a rotating shaft which are positioned on the base, a first transmission wheel connected with the motor and a first rotating shaft wheel connected with the rotating shaft; the number of teeth of the first rotating shaft wheel is larger than that of the first transmission wheel.
In a preferred embodiment, the vertical transmission assembly further comprises a second rotating shaft wheel connected to the other end of the rotating shaft, a synchronous belt wheel positioned on the base, a first synchronous belt positioned on the first transmission wheel and the first rotating shaft wheel, and a second synchronous belt positioned on the second rotating shaft wheel and the synchronous belt wheel; the vertical main arm is connected to the second synchronous belt.
In a preferred embodiment, the vertical driving assembly further comprises a first linear guide pair fixed to the base, and the vertical main arm is slidably coupled to the first linear guide pair.
In the vertical transmission assembly, a motor drives a first transmission wheel to drive a first rotating shaft wheel, a second rotating shaft wheel and a synchronous belt wheel to rotate, so that a second synchronous belt is driven and connected to a vertical main arm to do vertical linear motion along a first linear guide pair.
In a preferred embodiment, the horizontal transmission assembly comprises another motor positioned on the base, a second transmission wheel connected with the other motor, another synchronous pulley positioned on the base plate and a third synchronous belt connected between the second transmission wheel and the another synchronous pulley; the bracket is fixed on the third synchronous belt. The support is fixedly connected with a third synchronous belt through a screw and a pressing plate.
In a preferred embodiment, the horizontal transmission assembly further comprises a second linear guide pair fixed on the base, and the support is slidably connected with the second linear guide pair.
In the horizontal transmission assembly, another motor drives the second transmission wheel to drive another synchronous belt wheel to rotate, so as to drive the third synchronous belt and the support to do horizontal linear motion along the second linear guide pair.
In a preferred embodiment, the vertical main arm is fixedly connected with the inner sliding block of the first linear guide pair; the vertical main arm is fixedly connected with the second synchronous belt through a screw and a pressing plate.
In a preferred embodiment, a cleaning swab is arranged on the bracket; the sampling needle is positioned in the cleaning swab.
On the other hand, the utility model provides a sample analyzer, including sample storehouse and analysis part, still including the sampling device who is used for the analysis appearance of analysis liquid sample, this sampling device includes:
the sampling needle is fixed on the sampling needle fixing seat;
a base;
the horizontal driving mechanism is positioned on the base and comprises a bracket and a horizontal transmission component connected with the bracket;
the sampling needle fixing seat is connected with a third linear guide pair arranged on the bracket;
the vertical driving mechanism is positioned on the base and comprises a vertical main arm and a vertical transmission assembly connected with the vertical main arm;
the bearing assembly is fixedly connected with the vertical main arm; the bearing component applies force to the sampling needle and the sampling needle fixing seat in the process of driving the sampling needle to vertically move; and the bearing assembly bears and guides the sampling needle and the sampling needle fixing seat to move horizontally in the process of driving the sampling needle to move horizontally.
In a preferred embodiment, the bearing component comprises a horizontal guide groove and a roller; the horizontal guide groove is fixedly connected with the vertical main arm; the roller is fixed on the sampling needle fixing seat and is positioned in the horizontal guide groove; when the bracket is moved horizontally, the horizontal guide groove bears the roller in the vertical direction and guides the sampling needle fixing seat and the sampling needle to move horizontally; when the vertical main arm is vertically moved, the horizontal guide groove fixed on the vertical main arm and the roller positioned in the horizontal guide groove vertically move, and the roller applies force to the sampling needle fixing seat and the sampling needle to vertically move along the third linear guide pair.
In another preferred embodiment, the bearing assembly comprises a horizontal guide shaft and a linear bearing; the horizontal guide shaft is fixedly connected with the vertical main arm; the linear bearing is fixed on the sampling needle fixing seat; the linear bearing is sleeved on the horizontal guide shaft; when the support is moved horizontally, the linear bearing bears the sampling needle fixing seat and slides on the horizontal guide shaft to drive the sampling needle fixing seat and the sampling needle to move horizontally; when the vertical main arm is vertically moved, the horizontal guide shaft fixed on the vertical main arm and the linear bearing sleeved on the horizontal guide shaft vertically move, and the linear bearing applies force to the sampling needle fixing mechanism and the sampling needle to vertically move along the third linear guide pair.
In a preferred embodiment, the vertical transmission assembly comprises a motor and a rotating shaft which are positioned on the base, a first transmission wheel connected with the motor and a first rotating shaft wheel connected with the rotating shaft; the number of teeth of the first rotating shaft wheel is larger than that of the first transmission wheel.
In another preferred embodiment, the vertical transmission assembly further comprises a second shaft wheel connected to the other end of the shaft, a synchronous pulley on the base, a first synchronous belt on the first transmission wheel and the first shaft wheel, and a second synchronous belt on the second shaft wheel and the synchronous pulley; the vertical main arm is connected to the second synchronous belt; the vertical transmission assembly further comprises a first linear guide pair fixed on the base, and the vertical main arm is slidably connected with the first linear guide pair.
In another preferred embodiment, the sub-horizontal transmission assembly comprises another motor located on the base, a second transmission wheel connected with the other motor, another synchronous pulley located on the base plate, and a third synchronous belt connected between the second transmission wheel and the another synchronous pulley; the bracket is fixed on the third synchronous belt; the horizontal transmission assembly further comprises a second linear guide pair fixed on the base, and the support is connected with the second linear guide pair in a sliding mode.
In another preferred embodiment, the vertical main arm is fixedly connected with the inner sliding block of the first linear guide pair; the vertical main arm is fixedly connected with the second synchronous belt through a screw and a pressing plate.
In another preferred embodiment, a cleaning swab is arranged on the bracket; the sampling needle is positioned in the cleaning swab.
Advantageous effects
The utility model discloses an among the full-automatic sample analyzer that vertical drive mechanism and sampling device were applied to, through the linkage of carrier assembly, realized horizontal drive and vertical drive subassembly's linkage, simplified the product structure to reduce motor power's setting, reduced the energy consumption in the product sampling process simultaneously.
The vertical motion part realizes the amplification of output torque by adding a certain transmission ratio, namely a stepping motor with the same specification can drive larger load or provide larger puncture torque. The transmission mechanism of the vertical motion adopts synchronous belt transmission, the cost is lower, and the speed of the vertical motion can be adjusted according to the actual working condition. In the process of finishing the puncture sampling action, a larger puncture torque needs to be output, and the puncture sampling action is realized by controlling a stepping motor to output a larger torque at a lower speed; under other conditions that the output of the puncture torque is not needed, the stepping motor is controlled to run at a higher speed, so that the time consumption of the sampling mechanism is saved.
The vertical movement of the sampling needle fixing device and the transmission of force are both matched by a horizontal guide groove fixed on a vertical main arm and a roller (such as a cam bearing follower) on the sampling needle fixing device, and the roller on the sampling needle fixing seat can be directly driven by the horizontal guide groove to complete the puncture sampling action. The manufacturing accuracy requirement is reduced.
The horizontal movement mechanism and the vertical movement mechanism are both arranged on the same base, the requirements on manufacturing and assembling precision are reduced, and low cost is achieved through small quantity of parts and sheet metal design.
Drawings
Fig. 1 is a front view of a horizontal driving part of the sampling device of the present invention;
fig. 2 is an isometric view of a vertical drive portion of a sampling device of the present invention;
fig. 3 is a front view of the vertical driving part of the sampling device of the present invention;
fig. 4 is a partial front view of a vertical sliding part of a sampling needle of the sampling device of the present invention;
FIG. 5 is a partial side view of the vertical sliding portion of the sampling needle of the sampling device of the present invention;
fig. 6 is a top view of the vertical sliding part and the horizontal driving part of the sampling needle of the sampling device of the present invention;
fig. 7 is a side view of the vertical sliding part and the vertical driving part of the sampling needle of the sampling device of the present invention;
fig. 8 is a schematic view of another embodiment of the sampling device of the present invention;
fig. 9 is a schematic diagram of a sample analyzer according to the present invention.
Detailed Description
The invention will be further described with reference to the following figures and examples:
please refer to fig. 1-9 for the detailed design.
The utility model discloses a vertical driving mechanism includes vertical drive subassembly, connects the perpendicular main arm on vertical drive subassembly to and the carrier assembly, wherein, carrier assembly and perpendicular main arm fixed connection drive perpendicular main arm vertical motion through vertical drive subassembly, and the carrier assembly who connects on perpendicular main arm is vertical motion together with perpendicular main arm, thereby, the sampling needle vertical motion that the drive was born by carrier assembly. As shown in fig. 1-3, the vertical transmission assembly includes a motor 7, a rotating shaft 10, a first transmission wheel 8 connected with the motor and a first rotating shaft wheel 9 connected with the rotating shaft; the number of teeth of the first rotating shaft wheel 9 is larger than that of the first driving wheel 8. The larger the gear ratio between the first pulley 9 and the first transmission wheel 8, the larger the load or force that can be driven. Thereby realizing the purpose of driving the load with larger load to move by using smaller motor power. The vertical transmission assembly further comprises a second rotating shaft wheel 11 connected to the other end of the rotating shaft 10, a synchronous belt wheel 14, a first synchronous belt 12 positioned on the first transmission wheel 8 and the first rotating shaft wheel 9, a second synchronous belt 13 positioned on the second rotating shaft wheel 11 and the synchronous belt wheel 14, and a first linear guide pair 16; the vertical main arm 15 is connected to the second timing belt 13, and is slidably connected to the first linear guide pair 16. The motor 7 drives the first driving wheel 8 to rotate the first rotating shaft wheel 9, and the second rotating shaft wheel 11 and the synchronous belt wheel 14, so as to drive the second synchronous belt 13 and the vertical main arm 15 connected to the vertical main arm to do vertical linear motion or slide along the first linear guide pair 16.
Specifically, the bearing assembly comprises a horizontal guide groove 43 and a roller 21, as shown in fig. 1 to 7, the roller 21 is positioned in the horizontal guide groove 43, and the horizontal guide groove 43 is fixedly connected with the vertical main arm 15; and the roller 21 and the sampling needle 18 are fixed on the needle fixing seat 19. When the vertical main arm 15 is vertically moved, the horizontal guide groove 43 fixed to the vertical main arm and the roller 21 located in the horizontal guide groove are vertically moved, and the roller 21 vertically moves together with the sampling needle 18 carried by the horizontal guide groove 43.
In another specific embodiment, the bearing assembly comprises a horizontal guide shaft and a linear bearing, and as shown in fig. 8, the linear bearing 40 is sleeved on the horizontal guide shaft 39; the horizontal guide shaft 39 is fixedly connected with the vertical main arm 41; the linear bearing 40 is connected with a sampling needle fixing seat 42. When the vertical main arm 15 is vertically moved, a horizontal guide shaft 39 fixed to the vertical main arm and a linear bearing 40 fitted around the horizontal guide shaft vertically move together with the sampling needle supported by the horizontal guide shaft 39.
As shown in fig. 1-8, the sampling device of the present invention comprises a base 1, a sampling needle 18, a sampling needle fixing base 19 or 42, a horizontal driving mechanism for driving the sampling needle fixing base to move horizontally, a vertical driving mechanism for driving the sampling needle fixing base to move vertically, a bearing assembly, etc. The vertical driving mechanism comprises a vertical driving component and a vertical main arm connected with the vertical driving component, and the bearing component is connected with the vertical main arm. The vertical main arm is driven to vertically move through the vertical transmission assembly, the base 1 is composed of a sheet-shaped base plate, and the horizontal driving mechanism and the vertical driving mechanism are both located on the base 1.
In the specific embodiment, as shown in fig. 2 and 3, the vertical transmission assembly includes a motor 7, a rotating shaft 10, a first linear guide pair 16, a first transmission wheel 8, a first rotating shaft wheel 9, a second rotating shaft wheel 11 and a synchronous pulley 14, a first synchronous belt 12 arranged on the first transmission wheel 8 and the first rotating shaft wheel 9, and a second synchronous belt 13 arranged on the second rotating shaft wheel 11 and the synchronous pulley 14. The motor 7, the rotating shaft 10 and the first linear guide pair 16 are fixed on the base 1, and particularly, fixed on the back of the base 1; the first and second wheels 9 and 11 are located at the two ends of the shaft 10, respectively. The number of teeth of the first shaft gear 9 is greater than that of the first driving gear 8. Specifically, the motor 7 is a stepping motor. In the transmission operation process, the stepping motor 7 on the base 1 drives the first transmission wheel 8, the first transmission wheel 8 drives the first rotating shaft wheel 9 to rotate through the first synchronous belt 12, and the number of teeth of the first rotating shaft wheel 9 is greater than that of the first transmission wheel 8 fixed at the shaft end of the stepping motor 7, so that the rotating speed of the first rotating shaft wheel 9 is less than that of the stepping motor 7 at the same moment, and the torque output by the first rotating shaft wheel 9 is greater than that of the stepping motor 7. The first rotating shaft wheel 9 and the second rotating shaft wheel 11 fixed on the other side of the rotating shaft 10 are both fixed on the same rotating shaft 10, the second rotating shaft wheel 11 and the first rotating shaft wheel 9 synchronously rotate, and the rotating speed and the torque of the second rotating shaft wheel 11 and the first rotating shaft wheel 9 are consistent. The utility model discloses in, the gear ratio of first shaft wheel 9 and second drive wheel 8 is big more, and load or power that can drive are big more. In some embodiments, the ratio of the number of teeth of the first pulley 9 to the number of teeth of the second pulley 8 is greater than 1, preferably 2: 1.
As shown in fig. 3, the synchronous pulley 14 is disposed on the back of the base 1, and combines with the second spindle wheel 11 and the second synchronous belt 13 to form another synchronous belt transmission combination 30. The second timing belt 13 is connected to the vertical main arm 15, and specifically, the timing belt 13 is fixedly connected to the vertical main arm 15 through a screw 26 and a pressing plate 27. The first linear guide pair 16 is fixed on the back of the base 1, and the vertical main arm 15 is slidably connected with the first linear guide pair 16 for vertical design, specifically, the vertical main arm 15 is fixedly connected with a slide block 29 in the second linear guide pair 16 arranged on the base 1 by a screw 28, and the vertical main arm 15 can slide along the second linear guide pair 16. The specific process of driving the vertical main arm 15 to make vertical linear motion along the second linear guide pair 16 is as follows: the stepping motor 7 drives the first synchronous belt 12, the speed reduction and the torque increase are realized through the gear ratio of the first rotating shaft wheel 9 and the first transmission wheel 8, and then the synchronous belt transmission combination 30 is driven to drive the vertical main arm 15 to do vertical linear motion along the second linear guide pair 16.
In a specific embodiment, the horizontal driving mechanism comprises another motor 2, a third timing belt 4, a second transmission wheel 3, another timing pulley (not shown), a bracket 5 and a second linear guide pair 6, wherein the third timing belt 4 is wound on the first transmission wheel and the another timing pulley. The other motor may be a stepper motor. The other stepping motor 2 and the second transmission wheel 3 are arranged on the base 1, more specifically, the stepping motor 2 is fixed on the back surface of the base 1, and the second transmission wheel 3 is positioned on the front surface of the base 1 and connected with the stepping motor 2 through the base 1; the second linear guide pair 6 is horizontally fixed on the front surface of the base 1. The bracket 5 is fixed to the third timing belt 4 by a screw 22 and a pressure plate 23. Meanwhile, the bracket 5 is connected with the inner slide block 25 on the second linear guide pair 6, so that the bracket 5 can horizontally and linearly move (slide) on the second linear guide pair 6. The specific design is as shown in fig. 1, a stepping motor 2 on a base 1 drives a second transmission wheel 3, a third synchronous belt 4 is fixedly connected with a support 5 through a screw 22 and a pressing plate 23, the support 5 is fixedly connected with a sliding block 25 in a second linear guide pair 6 arranged on the base 1 through a screw 24, the second transmission wheel 3 is driven to rotate through the stepping motor 2, the third synchronous belt 4 is driven to horizontally transmit, and therefore the support 5 fixed on the third synchronous belt horizontally linearly moves along the second linear guide pair 6.
The utility model discloses in, sampling needle 18 is fixed on this sampling needle fixing base 19, and is concrete, is fixed in sampling needle fixing base 19 with sampling needle 18 through screw 33 and clamp plate 34. A third linear guide pair 20 is vertically fixed on the bracket 5, the sampling needle fixing seat 19 is slidably connected with the third linear guide pair 20, specifically, the sampling needle fixing seat 19 is fixedly connected with a sliding block 36 in the third linear guide pair 20 by a screw 35, and the sampling needle fixing seat 19 can vertically and freely slide along the third linear guide pair 20, as shown in fig. 4 and 5.
As also shown in fig. 4 and 5, the support 5 is provided with a washing swab 17 having a washing function for the outer arm of the sampling needle 18, in particular, the washing swab is located at the bottom of the support 5. More specifically, a cleaning swab 17 is fixed on the bracket 5 by a screw 31, the sampling needle 18 penetrates through a cleaning hole 32 arranged inside the cleaning swab 17, the sampling needle 18 cannot be separated from the cleaning hole 32 in the process of vertical movement, and the cleaning swab 17 has the function of cleaning the outer arm of the sampling needle 18.
In one embodiment of the present invention, the bearing assembly includes a horizontal guide groove 43 and a roller 21. Wherein, the horizontal guide groove 43 is fixedly connected with the vertical main arm 15; specifically, a horizontal guide groove 43 is fixedly connected to the vertical main arm 15 by a screw 37. The roller 21 is fixed on the sampling needle fixing seat 19, and more specifically, the roller 21 is fixed on the front surface of the sampling needle fixing seat 19. Meanwhile, the roller 21 is positioned in the horizontal guide groove 43, and the roller 21 can roll in the horizontal guide groove 43 under the driving of power. The roller 21 can take a certain radial load. In some embodiments, roller 21 is preferably a cam bearing follower.
Therefore, when the bracket 5 is moved horizontally by the horizontal transmission assembly, the horizontal guide groove 43 carries the roller 21 in the vertical direction, and the roller 21 rolls in the horizontal guide groove 43, so as to guide the sampling needle fixing seat 19 and the sampling needle 18 to move horizontally, as shown in fig. 5 and 6.
As shown in fig. 7, when the vertical main arm 15 is vertically moved by the driving unit, the horizontal guide groove 43 fixed to the vertical main arm 15 moves vertically, and the sampling needle holder 19 and the sampling needle 18 are carried by the roller 21 and the horizontal guide groove 43 and are driven to move vertically along the third linear guide pair 20. That is, when the vertical main arm 15 is vertically moved, the horizontal guide groove 43 fixed to the vertical main arm 15 is vertically moved, and the horizontal guide groove 43 vertically supports and guides the roller 21, the sampling needle holder 19, and the sampling needle 18 to vertically move along the linear guide pair 20.
The sampling needle 18 needs to transmit a large force between the horizontal guide groove 43 and the roller 21 during the puncture sampling process, and therefore, in some embodiments, the horizontal guide groove 43 needs to be made of a relatively rigid material. Preferably 304 steel.
In other embodiments of the present invention, the bearing assembly includes a horizontal guide shaft 39 and a linear bearing 40; the horizontal guide shaft 39 is fixedly connected with the vertical main arm 41; the linear bearing 40 is fixed on the sampling needle fixing seat 42; the horizontal guide shaft 39 passes through a linear bearing 40. Specifically, as shown in fig. 8, a horizontal guide shaft 39 is fixedly connected to a vertical main arm 41 by a screw 38, and the horizontal guide shaft 39 passes through a linear bearing 40 fixed in a sampling needle fixing base 42. When the support 5 is moved horizontally, the linear bearing 40 slides on the horizontal guide shaft 39 to drive the sampling needle fixing mechanism and the sampling needle to move horizontally; when the vertical main arm is vertically moved, the horizontal guide shaft fixed on the vertical main arm vertically moves along with the vertical main arm, and the sampling needle fixing mechanism and the sampling needle are born by the linear bearing and guided to vertically move along the third linear guide pair.
The utility model discloses the linear motion who mentions in is not only restricted to and realizes through synchronous belt drive mechanism, also can realize through the comparatively well-known mode replacement in machinery professional field such as screw drive, rack and pinion transmission.
In the present invention, as shown in fig. 9, the sample analyzer includes the sampling device 45 of the present invention, and a sample chamber 44 and an analyzing unit 46. Also included is a housing containing a sampling device 45 and an analysis component 46, with a sample chamber 44 secured to a side wall of the housing. By operation of the sampling device 45, the sampling needle 18 is moved horizontally between the sample magazine 44 and the analysis section 46. When the sampling needle 18 is moved to the position of the sample chamber 44 or the analysis component 46 by the sampling device 45, the sampling needle 18 performs a vertical movement, so as to achieve the functions of sucking the sample in the sample chamber 18 and releasing the sample to the analysis component 46.
The following is a detailed description of the sampling device and the sample analyzer of the present invention.
The specific execution steps are as follows:
(1) the sampling device 45 is in the initial position, that is, the sampling needle 18 is located right above the sample bin 44 in the horizontal direction, and is located at the upper position (the initial position) in the vertical direction, and at this time, the horizontal motor 2 is locked;
(2) the sampling device 45 is vertically moved to the lower position for puncture sampling, the driving motor 7 enables the vertical main arm 15 to vertically move downwards along the first linear guide pair 16, the horizontal guide groove 43 and the roller 21 are driven to move downwards together, and therefore the sampling needle fixing seat and the sampling needle are driven to vertically slide downwards along the third vertical guide pair 20 to the upper surface of the sample bin 44 for puncture sampling;
(3) after sampling is finished, the sampling device 45 vertically moves to an upper position, the driving motor 7 enables the vertical main arm 15 to vertically move upwards along the lower part of the first linear guide pair 16, the horizontal guide groove 43 and the roller 21 are driven to move upwards together, and the roller and the horizontal guide groove drive the sampling needle fixing seat and the sampling needle to vertically slide upwards to an original position (upper position) along the third vertical guide pair 20 while bearing the sampling needle fixing seat and the sampling needle;
(4) locking the vertical motor 7;
(5) the sampling device 45 performs horizontal movement to a position right above the analysis part 46, and the horizontal motor 2 drives the transmission wheel 3 to drive the bracket 5 to horizontally move (move rightwards in the utility model) along the second linear guide pair 6 to a position right above the analysis part 46; at this time, the sampling needle fixing seat fixed on the bracket and the sampling needle roll in the horizontal guide groove through the roller and move rightwards together with the bracket to the right above the analysis component 46; specifically, a needle is used directly above the analysis unit 46;
(6) locking the horizontal motor 2;
(7) the sampling device 45 performs vertical movement into the analysis component 46 (lower position) for sample separation, the driving motor 7 enables the vertical main arm 15 to vertically move downwards along the first linear guide pair 16, and the horizontal guide groove 43 and the roller 21 are driven to move downwards together, so that the sampling needle fixing seat and the sampling needle are driven to vertically slide downwards along the third vertical guide pair 20 into the analysis component 46;
(8) after sample division is finished, vertical movement is carried out to an upper position, the driving motor 7 enables the vertical main arm 15 to vertically move upwards along the lower part of the first linear guide pair 16, the horizontal guide groove 43 and the roller 21 are driven to move upwards together, and the roller and the horizontal guide groove drive the sampling needle fixing seat and the sampling needle to vertically slide upwards to an original position (upper position) along the third vertical guide pair 20 while bearing the sample needle fixing seat and the sampling needle;
(9) after the above steps are completed, the vertical motor 7 is locked;
(10) the sampling rotating shaft is reset to the initial position, the horizontal motor 2 drives the driving wheel 3 to drive the bracket 5 to horizontally move (leftwards move in the utility model) to the initial position along the second linear guide pair 6; at the moment, the sampling needle fixing seat fixed on the bracket and the sampling needle roll in the horizontal guide groove through the roller wheel and move to the initial position leftwards together with the bracket.
Claims (6)
1. The vertical driving mechanism for driving the sampling needle of the sampling device to move is characterized by comprising a vertical transmission assembly, a vertical main arm connected to the vertical transmission assembly and a bearing assembly, wherein the bearing assembly is fixedly connected with the vertical main arm and is used for applying force to the sampling needle in the process of driving the sampling needle to move vertically.
2. The vertical drive mechanism as recited in claim 1, wherein the carrier assembly includes a horizontal guide channel and a roller, the roller being located within the horizontal guide channel; the horizontal guide groove is fixedly connected with the vertical main arm; the roller is connected with the sampling needle.
3. The vertical drive mechanism of claim 1, wherein the carrier assembly comprises a horizontal guide shaft and a linear bearing, the linear bearing being sleeved on the horizontal guide shaft; the horizontal guide shaft is fixedly connected with the vertical main arm; the linear bearing is connected with the sampling needle.
4. The vertical drive mechanism as in one of claims 1-3, wherein the vertical drive assembly comprises a motor, a shaft, a first drive wheel coupled to the motor, and a first shaft wheel coupled to the shaft; the number of teeth of the first rotating shaft wheel is larger than that of the first transmission wheel.
5. The vertical drive mechanism as in claim 4, wherein the vertical drive assembly further comprises a second shaft wheel connected to the other end of the shaft, a timing pulley, a first timing belt on the first drive wheel and the first shaft wheel, a second timing belt on the second shaft wheel and the timing pulley; the vertical main arm is connected to the second synchronous belt.
6. The vertical drive mechanism as recited in claim 1, wherein the vertical drive assembly further comprises a first linear guide pair, the vertical main arm being slidably coupled to the first linear guide pair.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109900526A (en) * | 2019-03-27 | 2019-06-18 | 利多(香港)有限公司 | A kind of vertical driving mechanism, sampling apparatus and sample analyser |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109900526A (en) * | 2019-03-27 | 2019-06-18 | 利多(香港)有限公司 | A kind of vertical driving mechanism, sampling apparatus and sample analyser |
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