CN210108776U - Vertical drive mechanism for driving the movement of the sampling needle of the sampling device - Google Patents

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

Vertical drive mechanism for driving the movement of the sampling needle of the sampling device

technical field

The utility model relates to the field of medical instruments, in particular to an automatic sample analyzer for analyzing liquid samples, a sampling device used for the analyzer, and a vertical drive mechanism for the sampling device to move vertically.

Background technique

The following background art is used to help readers understand the present invention, and should not be regarded as prior art.

Fully automatic sample analyzers have been widely used in the field of medical testing. For example, these analyzers are used to analyze blood samples and analyte components in urine samples. In blood cell analysis, blood collection needs to be achieved through sampling needles. The sampling needle uses The transmission mechanism realizes movement in both horizontal and vertical directions.

For example, Chinese patent CN200620054318.9 adopts a two-degree-of-freedom sampling mechanism including a machine base, a lifting power part, a deflection power part, a synchronous belt, a lifting connection part, a sampling needle slider assembly, a deflection connection part, a guide shaft and a deflection shaft. The synchronous belt and the deflection power piece are installed on the base, the synchronous belt is vertically installed on the machine base through the synchronous pulley, the synchronous pulley is linked with the lifting power piece, and the lifting connecting piece is fixed on the synchronous belt and connected with the synchronous belt. The sampling needle slider assembly is linked, the deflection connecting member is linked with the deflection power member, the guide shaft and the deflection shaft are vertically installed between the sampling needle slider assembly and the deflection connecting member, and the sampling needle slider assembly is movable. sleeved on the guide shaft and the deflection shaft. The sampling needle slider assembly is driven vertically up and down along the guide shaft by the synchronous belt. This patented technology cannot realize the horizontal movement of the sampling needle.

The sampling device of the existing automatic sample analyzer still needs to use a higher power motor to complete the sampling, the cost of the analyzer remains high, the sampling time is long, the installation accuracy is high, the production efficiency is low, and the repair rate during use is high. Areas that need improvement.

Utility model content

The first purpose of the present invention is to provide a vertical drive mechanism capable of driving the sampling needle of the sampling device to move vertically with low power and high efficiency.

Concretely, the utility model realizes through the following technical solutions:

A vertical drive mechanism for driving the movement of the sampling needle of the sampling device, comprising a vertical transmission assembly, a vertical main arm connected to the vertical transmission assembly, and a carrying assembly, the carrying assembly is fixedly connected with the vertical main arm, and is used for driving the sampling needle vertically Apply force to the sampling needle during movement.

When the vertical drive mechanism drives the vertical main arm to move vertically upward, the bearing assembly is driven by the vertical main arm to move upward, and the upward force is generated to carry and push the sampling needle to move upward. When the vertical drive mechanism drives the vertical main arm downward for vertical movement, the bearing assembly is driven by the vertical main arm to move downward, which generates a downward force bearing and pulls the sampling needle to move downward; at the same time, because the sampling needle and the bearing assembly together The self-weight is increased and the downward force is increased, which is more conducive to the puncture of the sample chamber for sampling.

In a preferred embodiment, the bearing assembly includes a horizontal guide groove and a roller, and the roller is located 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 through the sampling needle holder.

As a preferred embodiment, the bearing assembly includes a horizontal guide shaft and a linear bearing, 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 through the sampling needle holder.

As a preferred embodiment, the vertical transmission assembly includes 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 greater than that of the first transmission wheel.

As a preferred embodiment, the vertical transmission assembly further comprises a second rotating shaft wheel connected to the other end of the rotating shaft, a timing belt pulley, a first timing belt located on the first transmission wheel and the first rotating shaft wheel, located on the second rotating shaft wheel and The second synchronous belt on the synchronous pulley; the vertical main arm is connected to the second synchronous belt.

As a preferred embodiment, the vertical transmission assembly further includes a first linear guide pair, and the vertical main arm is connected with the first linear guide pair.

On the other hand, the present invention also provides a sampling device, which includes the vertical drive mechanism of the present invention, and the bearing assembly enables the sampling needle to move in both horizontal and vertical directions, which simplifies the device structure and reduces energy consumption.

Specifically, the sampling device of the analyzer for analyzing liquid samples of the present invention, the analyzer for analyzing liquid samples, includes:

The sampling needle and the sampling needle fixing seat, the sampling needle is fixed on the sampling needle fixing seat;

pedestal;

A horizontal drive mechanism on the base, including a bracket and a horizontal transmission assembly connected with the bracket;

The sampling needle holder is slidably connected with the third linear guide pair arranged on the bracket;

The vertical drive mechanism located on the base, including the vertical main arm and the vertical transmission assembly connected with the vertical main arm;

a bearing assembly, which is fixedly connected with the vertical main arm; the bearing assembly exerts force on the sampling needle and the sampling needle fixing seat during the vertical movement of the sampling needle; and the bearing assembly carries and guides the sampling needle during the horizontal movement of the driving sampling needle The sampling needle and the sampling needle fixing seat move horizontally and linearly.

Among them, the horizontal drive mechanism adopts the needle holder and the sampling needle to make horizontal linear motion. The vertical drive mechanism uses the needle holder and the sampling needle to make vertical linear motion.

When the vertical drive mechanism drives the vertical main arm to move upward, the bearing assembly is driven by the vertical main arm to move upward, and the upward force is generated to carry and push the sampling needle holder and the sampling needle to move upward. When the vertical drive mechanism drives the vertical main arm downward for vertical movement, the bearing assembly is driven by the vertical main arm to move downward, generating a downward force bearing and pulling the sampling needle holder and the sampling needle to move downward; at the same time, due to the load The component is connected with the sampling needle fixing seat, which increases the self-weight and the downward force, which is more conducive to the puncture of the sample chamber by the sampling.

As a preferred embodiment, the bearing assembly includes 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 holder, and is located in the horizontal guide groove; when the bracket is moved horizontally , the horizontal guide groove carries the roller in the vertical direction, and guides the sampling needle holder and the sampling needle to move horizontally; when the vertical main arm is moved vertically, the horizontal guide groove fixed on the vertical main arm and the roller located in the horizontal guide groove follow For vertical movement, the rollers carry the sampling needle holder and the sampling needle, and together they move vertically along the third straight-line guide pair.

As a preferred embodiment, the bearing assembly includes 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 holder; the linear bearing is sleeved on the horizontal guide shaft; When moving, the linear bearing carries the sampling needle holder and slides on the horizontal guide shaft to drive the sampling needle holder and the sampling needle to move horizontally; when the vertical main arm is moved vertically, the horizontal guide shaft fixed on the vertical main arm and the sleeve are connected to the vertical main arm. The linear bearing on the horizontal guide shaft moves vertically, and the linear bearing carries the sampling needle fixing mechanism and the sampling needle, and moves vertically along the third linear guide pair.

As a preferred embodiment, the vertical transmission assembly includes a motor and a rotating shaft 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 greater than that of the first transmission wheel.

As a preferred embodiment, the vertical transmission assembly further comprises a second rotating shaft wheel connected to the other end of the rotating shaft, a timing belt pulley located on the base, a first timing belt located on the first transmission wheel and the first rotating shaft wheel, located on the The second rotating shaft wheel and the second synchronous belt on the synchronous pulley; the vertical main arm is connected to the second synchronous belt.

In a preferred embodiment, the vertical transmission assembly further includes a first linear guide pair fixed on the base, and the vertical main arm is slidably connected to the first linear guide pair.

In the vertical transmission assembly, the motor drives the first transmission wheel, drives the first pivot wheel, as well as the second pivot wheel and the synchronous pulley to rotate, thereby also driving the second synchronous belt and the guide pair connected to the vertical main arm along the first straight line. Vertical linear motion.

As a preferred embodiment, the horizontal transmission assembly includes another motor located on the base, a second transmission wheel connected to the other motor, another synchronous pulley located on the base plate, and connected to the second transmission wheel and the other The third synchronous belt between the synchronous pulleys; the bracket is fixed on the third synchronous belt. The bracket is fixedly connected with the third timing belt through screws and pressing plates.

In a preferred embodiment, the horizontal transmission assembly further includes a second linear guide pair fixed on the base, and the bracket is slidably connected to the second linear guide pair.

In the horizontal transmission assembly, another motor drives the second transmission wheel and drives the other synchronous pulley to rotate, thereby driving the third synchronous belt and the bracket to move horizontally and linearly along the second linear guide pair.

As a preferred embodiment, the vertical main arm is fixedly connected to the inner slider of the first linear guide pair; the vertical main arm is fixedly connected to the second timing belt through screws and pressing plates.

As a preferred embodiment, a cleaning swab is arranged on the support; the sampling needle is located in the cleaning swab.

On the other hand, the utility model also provides a sample analyzer, including a sample chamber and an analysis part, and also includes a sampling device of the analyzer for analyzing liquid samples, the sampling device includes:

The sampling needle and the sampling needle fixing seat, the sampling needle is fixed on the sampling needle fixing seat;

pedestal;

A horizontal drive mechanism on the base, including a bracket and a horizontal transmission assembly connected with the bracket;

The sampling needle fixing seat is connected with the third linear guide pair arranged on the bracket;

The vertical drive mechanism located on the base, including the vertical main arm and the vertical transmission assembly connected with the vertical main arm;

a bearing assembly, which is fixedly connected with the vertical main arm; the bearing assembly exerts force on the sampling needle and the sampling needle fixing seat during the vertical movement of the sampling needle; and the bearing assembly carries and guides the sampling needle during the horizontal movement of the driving sampling needle The sampling needle and the sampling needle fixing seat move horizontally and linearly.

As a preferred embodiment, the bearing assembly includes 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 holder, and is located in the horizontal guide groove; when the bracket is moved horizontally , the horizontal guide groove carries the roller in the vertical direction, and guides the sampling needle holder and the sampling needle to move horizontally; when the vertical main arm is moved vertically, the horizontal guide groove fixed on the vertical main arm and the roller located in the horizontal guide groove follow For vertical movement, the roller exerts force on the fixed seat of the sampling needle and the sampling needle, and together it moves vertically along the third linear guide pair.

As another preferred embodiment, the bearing assembly includes 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 holder; the linear bearing is sleeved on the horizontal guide shaft; When moving the bracket, the linear bearing carries the sampling needle holder and slides on the horizontal guide shaft to drive the sampling needle holder and the sampling needle to move horizontally; when the vertical main arm is moved vertically, the horizontal guide shaft and sleeve fixed on the vertical main arm The linear bearing connected to the horizontal guide shaft moves vertically, and the linear bearing exerts force on the sampling needle fixing mechanism and the sampling needle, and moves vertically along the third linear guide pair.

As a preferred embodiment, the vertical transmission assembly includes a motor and a rotating shaft 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 greater than that of the first transmission wheel.

As another 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 located on the base, and a first synchronous belt located on the first transmission wheel and the first rotating shaft wheel , the 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 also includes a first linear guide pair fixed on the base, and the vertical main arm is connected to the second synchronous belt. The first linear guide pair is slidably connected.

In another preferred embodiment, the horizontal drive assembly includes another motor located on the base, a second transmission wheel connected to the other motor, another synchronous pulley located on the base plate and connected to the second transmission wheel and the third synchronous belt between the other synchronous pulley; the bracket is fixed on the third synchronous belt; the horizontal transmission assembly also includes a second linear guide pair fixed on the base, and the bracket is slidably connected with the second linear guide pair .

As another preferred embodiment, the vertical main arm is fixedly connected to the inner slider of the first linear guide pair; the vertical main arm is fixedly connected to the second timing belt through screws and pressing plates.

As another preferred embodiment, a cleaning swab is arranged on the support; the sampling needle is located in the cleaning swab.

beneficial effect

In the automatic sample analyzer to which the vertical drive mechanism and the sampling device of the utility model are applied, the linkage of the horizontal drive and the vertical drive assembly is realized through the linkage of the bearing assembly, the product structure is simplified, and the setting of the power motor is reduced, At the same time, the energy consumption during the product sampling process is reduced.

The vertical motion part realizes the amplification of the output torque by adding a certain transmission ratio, that is, the stepping motor of the same specification can drive a larger load or provide a larger puncture torque. The transmission mechanism of vertical motion adopts synchronous belt drive, which has lower cost, and the speed of vertical motion can be adjusted according to actual working conditions. In the process of completing the puncture sampling action, it is necessary to output a large puncture torque, which is realized by controlling the stepper motor to output a large torque at a lower speed; in other cases where the output puncture torque is not required, control the stepper motor to output a relatively large torque. High speed operation to save time of sampling mechanism.

The vertical movement and force transmission of the sampling needle fixing device are matched by the horizontal guide groove fixed on the vertical main arm and the roller (such as a cam bearing follower) on the sampling needle fixing device, and the sampling needle can be directly driven by the horizontal guide groove. The roller on the needle holder completes the puncture sampling action. Reduced manufacturing precision requirements.

Both the horizontal motion mechanism and the vertical motion mechanism are installed on the same base, which reduces the requirements for manufacturing and assembly accuracy, and achieves low cost through the small number of parts and the design of sheet metal.

Description of drawings

Fig. 1 is the front view of the horizontal drive part of the sampling device of the present utility model;

Fig. 2 is the isometric side view of the vertical drive part of the sampling device of the present invention;

Fig. 3 is the front view of the vertical drive part of the sampling device of the utility model;

4 is a partial front view of the vertical sliding part of the sampling needle of the sampling device of the utility model;

5 is a partial side view of the vertical sliding portion of the sampling needle of the sampling device of the utility model;

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 utility model;

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 utility model;

8 is a schematic diagram of another embodiment of the sampling device of the present invention;

FIG. 9 is a schematic diagram of a sample analyzer of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and example, the utility model is further described:

Please refer to Figure 1--9 for the specific design scheme description.

The vertical drive mechanism of the utility model comprises a vertical transmission component, a vertical main arm connected to the vertical transmission component, and a bearing component, wherein the bearing component is fixedly connected with the vertical main arm, and the vertical main arm is driven to move vertically by the vertical transmission component, and The carrying assembly connected to the vertical main arm moves vertically together with the vertical main arm, thereby driving the sampling needle carried by the carrying assembly to move vertically. As shown in Figures 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 greater than that of the first rotating shaft wheel 9. A transmission wheel 8 . And the greater the gear ratio between the first rotating shaft wheel 9 and the first transmission wheel 8, the greater the load or force that can be driven. Thereby, the movement of the load with a larger load can be driven by a smaller motor power. The vertical transmission assembly also includes a second rotating shaft wheel 11 connected to the other end of the rotating shaft 10, a timing pulley 14, a first timing belt 12 located on the first transmission wheel 8 and the first rotating shaft wheel 9, located on the second rotating shaft wheel 11 and the first timing belt 12. The second timing belt 13 on the timing pulley 14 and the 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 transmission wheel 8, drives the first pivot wheel 9, as well as the second pivot wheel 11 and the synchronous pulley 14 to rotate, thereby also driving the second synchronous belt 13 and the vertical main arm 15 to guide along the first straight line The vice 16 performs vertical linear motion or sliding.

Specifically, the bearing assembly includes a horizontal guide groove 43 and a roller 21. As shown in FIGS. 1-7, the roller 21 is located 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 by using the needle holder 19. When the vertical main arm 15 is moved vertically, the horizontal guide groove 43 fixed on the vertical main arm and the roller 21 located in the horizontal guide groove move vertically, and the roller 21 and the horizontal guide groove 43 carry the sampling needle 18 together for vertical movement. .

In another specific embodiment, the bearing assembly includes a horizontal guide shaft and a linear bearing. 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 Connect to the sampling needle holder 42 . When the vertical main arm 15 is moved vertically, the horizontal guide shaft 39 fixed on the vertical main arm and the linear bearing 40 sleeved on the horizontal guide shaft move vertically, and the linear bearing and the horizontal guide shaft 39 carry the sampling needle together for vertical movement. sports.

As shown in Figures 1-8, the sampling device of the present invention includes a base 1, a sampling needle 18, a sampling needle fixing seat 19 or 42, and a horizontal driving mechanism for driving the sampling needle fixing seat to move horizontally, and driving the sampling needle fixing seat vertically Motion vertical drive mechanism and carrying components, etc. Wherein, the vertical drive mechanism includes a vertical drive assembly and a vertical main arm connected with it, and the bearing assembly is connected with the vertical main arm. The vertical main arm is driven to move vertically by the vertical transmission assembly. The base 1 is composed of a one-piece base plate, and the horizontal driving mechanism and the vertical driving mechanism are both located on the base 1 .

In a specific embodiment, as shown in FIGS. 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 , and a second rotating shaft wheel 11 and the timing belt pulley 14 , and the first timing belt 12 located on the first transmission wheel 8 and the first pivot wheel 9 , and the second timing belt 13 located on the second pivot wheel 11 and the timing pulley 14 . The motor 7 , the rotating shaft 10 and the first linear guide pair 16 are fixed on the base 1 , specifically, on the back of the base 1 ; the first rotating shaft wheel 9 and the second rotating shaft wheel 11 are located at both ends of the rotating shaft 10 respectively . The number of teeth of the first shaft wheel 9 is greater than that of the first transmission wheel 8 . Specifically, the motor 7 is a stepping motor. During the transmission operation, the stepping motor 7 on the base 1 drives the first transmission wheel 8, and the first transmission wheel 8 drives the first pivot wheel 9 to rotate through the first synchronous belt 12. The number of teeth is greater than the number of teeth of the first transmission wheel 8 fixed on the shaft end of the progressive motor 7. At the same time, the rotational speed of the first revolving wheel 9 is smaller than the rotational speed of the stepping motor 7, so that the output torque of the first revolving wheel 9 is greater than that of the stepping motor. 7 torque. 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 rotates synchronously with the first rotating shaft wheel 9, and the second rotating shaft wheel 11 and the The rotational speed and torque of the one-spindle wheel 9 are the same. In the present invention, the larger the gear ratio between the first shaft wheel 9 and the second transmission wheel 8, the larger the load or force that can be driven. In some specific embodiments, the gear ratio between the first rotating shaft wheel 9 and the second transmission wheel 8 is greater than 1, preferably 2:1.

As shown in FIG. 3 , the timing pulley 14 is arranged on the back of the base 1 , and is combined with the second shaft wheel 11 and the second timing belt 13 to form another timing belt drive 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 screws 26 and a pressing plate 27 . The first linear guide pair 16 is fixed on the back of the base 1 and is designed vertically. The vertical main arm 15 is slidably connected to the first linear guide pair 16. The inner slider 29 of the second linear guide pair 16 on the base 1 is fixedly connected, 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 perform vertical linear motion along the second linear guide pair 16 is as follows: the stepper motor 7 drives the first synchronous belt 12, and the gear ratio of the first shaft wheel 9 and the first transmission wheel 8 realizes deceleration and Increase the torque, and then drive the synchronous belt drive assembly 30 to drive the vertical main arm 15 to move vertically along the second linear guide pair 16 .

In a specific embodiment, the horizontal drive mechanism includes another motor 2, a third synchronous belt 4, a second transmission pulley 3, another synchronous pulley (not shown in the figure), a bracket 5 and a second linear guide pair 6, The third timing belt 4 is wound around the first transmission pulley and the other timing pulley. Another motor may be a stepper motor. Another stepping motor 2 and a second transmission wheel 3 are arranged on the base 1. More specifically, the stepping motor 2 is fixed on the back of the base 1, and the second transmission wheel 3 is located on the front of the base 1 and passes through the base. 1 Connect the progressive motor 2; the second linear guide pair 6 is horizontally fixed on the front of the base 1. The bracket 5 is fixed on the third timing belt 4 by the screws 22 and the pressing plate 23 . At the same time, the bracket 5 is connected with the inner slider 25 on the second linear guide pair 6 , so that the bracket 5 can move (slide) horizontally and linearly on the second linear guide pair 6 . The specific design is shown in FIG. 1 , the stepper motor 2 on the base 1 drives the second transmission wheel 3 , the third timing belt 4 is fixedly connected to the bracket 5 through the screw 22 and the pressure plate 23 , and the bracket 5 is connected to the bracket 5 with the screw 24 The inner slider 25 of the second linear guide pair 6 arranged on the base 1 is fixedly connected, and the second transmission wheel 3 is driven to rotate by the stepping motor 2, which drives the third synchronous belt 4 to horizontally drive, so as to be fixed on the third synchronous belt. The upper bracket 5 moves horizontally and linearly along the second linear guide pair 6 .

In the present invention, the sampling needle 18 is fixed on the sampling needle fixing seat 19 . Specifically, the sampling needle 18 is fixed on the sampling needle fixing seat 19 by the screw 33 and the pressing plate 34 . A third linear guide pair 20 is vertically fixed on the bracket 5, and the sampling needle holder 19 is slidably connected to the third linear guide pair 20. Specifically, a screw 35 connects the sampling needle holder 19 and the third linear guide pair 20 to the inner slider 36 is fixedly connected, and the sampling needle holder 19 can freely slide vertically along the third linear guide pair 20 , as shown in FIG. 4 and FIG. 5 .

Also as shown in FIGS. 4 and 5 , a cleaning swab 17 is arranged on the bracket 5 , which has the function of cleaning the outer arm of the sampling needle 18 . Specifically, the cleaning swab is located at the bottom of the bracket 5 . More specifically, a cleaning swab 17 is fixed on the bracket 5 with screws 31, the sampling needle 18 penetrates through the cleaning hole 32 placed inside the cleaning swab 17, and the sampling needle 18 will not detach from the cleaning hole during the vertical movement. 32. 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 . The horizontal guide groove 43 is fixedly connected to the vertical main arm 15 ; specifically, a horizontal guide groove 43 is fixedly connected to the vertical main arm 15 with screws 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 . At the same time, the roller 21 is located in the horizontal guide groove 43 , and driven by the power, the roller 21 can roll in the horizontal guide groove 43 . The roller 21 can bear a certain radial load. In some embodiments, the roller 21 is preferably a cam bearing follower.

Therefore, when the bracket 5 is moved horizontally by the horizontal transmission assembly, while the horizontal guide groove 43 carries the roller 21 in the vertical direction, the roller 21 also rolls in the horizontal guide groove 43 to guide the sampling needle holder 19 and the sampling needle 18 to move horizontally , as shown in Figures 5 and 6.

As shown in FIG. 7 , when the vertical main arm 15 is vertically moved by the conveyor assembly, the horizontal guide groove 43 fixed on the vertical main arm 15 moves vertically along with it, and is carried by the roller 21 and the horizontal guide groove 43 and fixed with the sampling needle. The seat 19 and the sampling needle 18 move vertically along the third linear guide pair 20 . That is, when the vertical main arm 15 is moved vertically, the horizontal guide groove 43 fixed on the vertical main arm 15 moves vertically, and the horizontal guide groove 43 carries and guides the roller 21, the sampling needle holder 19 and the sampling needle in the vertical direction. 18 moves vertically along the linear guide pair 20 .

During the puncturing and sampling process of the sampling needle 18, a relatively large force needs to be transmitted between the horizontal guide groove 43 and the roller 21. Therefore, in some embodiments, the horizontal guide groove 43 needs to use a relatively rigid material. 304 steel is preferred.

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 Pass through the linear bearing 40 . Specifically, as shown in FIG. 8 , the horizontal guide shaft 39 is fixedly connected to the vertical main arm 41 by screws 38 , and the horizontal guide shaft 39 passes through the linear bearing 40 fixed in the sampling needle holder 42 . When the bracket 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 moved vertically, the horizontal guide shaft fixed on the vertical main arm moves vertically. , the linear bearing is used to carry and guide the sampling needle fixing mechanism and the sampling needle to move vertically along the third linear guide pair.

The linear motion mentioned in the present utility model is not limited to be realized by the synchronous belt drive mechanism, and can also be realized by means of screw drive, rack and pinion drive, etc., which are well known in the mechanical field.

In the present invention, as shown in FIG. 9 , the sample analyzer includes the sampling device 45 of the present invention, a sample chamber 44 and an analysis part 46 . It also includes a housing for accommodating the sampling device 45 and the analysis part 46, and the sample chamber 44 is fixed on the side wall of the housing. By operation of the sampling device 45 , the sampling needle 18 is moved horizontally between the sample chamber 44 and the analysis part 46 . When the sampling needle 18 moves to the sample chamber 44 or the analysis part 46 driven by the sampling device 45, the sampling needle 18 moves vertically, so as to realize the suction of the sample in the sample chamber 18 and the release of the sample to the analysis part 46 functions.

The specific sampling process of the sampling device and the sample analyzer of the present invention will be described in detail below.

The specific execution steps are:

(1) The sampling device 45 is in the initial position, that is, the sampling needle 18 is positioned directly above the sample chamber 44 in the horizontal direction, and is positioned in the upper position (original position) in the vertical direction, and the horizontal motor 2 is locked at this time;

(2) Execute the vertical movement of the sampling device 45 to the lower position for puncture sampling, the driving motor 7 makes the vertical main arm 15 move vertically downward along the first linear guide pair 16, and drives the horizontal guide groove 43 and the roller 21 to move downward together, thereby driving The sampling needle holder and the sampling needle slide vertically downward along the third vertical guide pair 20 to the upper surface of the sample chamber 44 and puncture for sampling;

(3) After the sampling is completed, the sampling device 45 performs vertical movement to the upper position, and the driving motor 7 makes the vertical main arm 15 move vertically upward along the lower part of the first linear guide pair 16, and drives the horizontal guide groove 43 and the roller 21 to move upward together, While carrying the sample needle holder and the sampling needle, the roller and the horizontal guide groove drive the sample needle holder and the sample needle to slide vertically upward along the third vertical guide pair 20 to the original position (upper position);

(4) The vertical motor 7 is locked;

(5) The sampling device 45 performs horizontal movement to the top of the analysis part 46 , and the horizontal motor 2 drives the transmission wheel 3 to drive the bracket 5 to move horizontally along the second linear guide pair 6 (rightward movement in the present invention) to the right side of the analysis part 46 Above; at this time, the sampling needle holder fixed on the bracket and the adopting needle are rolled in the horizontal guide groove through rollers and move to the right with the bracket to just above the analyzing part 46; specifically, the adopting needle is located directly above the analyzing part 46 ;

(6) The horizontal motor 2 is locked;

(7) The sampling device 45 executes vertical movement into the analysis part 46 (lower position) for sampling, and the driving motor 7 makes the vertical main arm 15 move vertically downward along the first linear guide pair 16, and drives the horizontal guide groove 43 and the roller 21 Move downward together, thereby driving the sampling needle holder and the sampling needle to slide vertically downward into the analysis part 46 along the third vertical guide pair 20;

(8) After the sample separation is completed, perform vertical movement to the upper position, drive the motor 7 to make the vertical main arm 15 move vertically upward along the lower part of the first linear guide pair 16, and drive the horizontal guide groove 43 and the roller 21 to move upward together, and the roller and While carrying the sample needle holder and the sampling needle, the horizontal guide groove drives the sample needle holder and the sample needle to slide vertically upward along the third vertical guide pair 20 to the original position (upper position);

(9) After completing the above steps, the vertical motor 7 is locked;

(10) The sampling shaft is reset to the initial position, and the horizontal motor 2 drives the transmission wheel 3 to drive the bracket 5 to move horizontally (leftward in the present utility model) to the initial position along the second linear guide pair 6; The sampling needle fixing seat and the adopting needle are moved to the left together with the bracket to the initial position by rolling in the horizontal guide groove through the roller.

Claims (6)

1. the vertical drive mechanism that is used to drive the movement of the sampling needle of the sampling device, is characterized in that, comprises the vertical transmission assembly, the vertical main arm and the bearing assembly that are connected on the vertical transmission assembly, and this bearing assembly is fixedly connected with the vertical main arm, with Force is applied to the sampling needle during the vertical movement of the sampling needle. 2 . The vertical drive mechanism according to claim 1 , wherein the bearing assembly comprises a horizontal guide groove and a roller, and the roller is located in the horizontal guide groove; the horizontal guide groove is fixedly connected with the vertical main arm; the roller is connected with the sampling pin connection. 3. The vertical drive mechanism according to claim 1, wherein the bearing assembly comprises a horizontal guide shaft and a linear bearing, and the linear bearing is sleeved on the horizontal guide shaft; the horizontal guide shaft is fixedly connected with the vertical main arm; Sampling needle connection. 4. The vertical drive mechanism according to one of claims 1-3, wherein 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 a rotating shaft wheel is greater than that of the first transmission wheel. 5. The vertical drive mechanism according to claim 4, wherein the vertical transmission assembly further comprises a second revolving wheel connected to the other end of the revolving shaft, a synchronous pulley, a second reel on the first transmission wheel and the first revolving wheel. a synchronous belt, which is located on the second rotating shaft wheel and the second synchronous belt on the synchronous pulley; the vertical main arm is connected to the second synchronous belt. 6 . The vertical drive mechanism according to claim 1 , wherein the vertical transmission assembly further comprises a first linear guide pair, and the vertical main arm is slidably connected to the first linear guide pair. 7 .

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