CN219695151U - Limit movement mechanism, test tube rack transportation equipment and sample analyzer - Google Patents

Abstract

The utility model discloses a limiting movement mechanism, test tube rack conveying equipment and a sample analyzer, wherein the limiting movement mechanism comprises a bottom plate, a first guide rail, a sliding block, a driving assembly and a limiting piece, wherein the first guide rail is arranged on one side of the bottom plate, the sliding block is arranged on the first guide rail, and the driving assembly is arranged on one side of the bottom plate and used for driving the sliding block to move along the first guide rail; the locating part is connected on the slider for the transmission direction of restriction test-tube rack, and can remove along first guide rail under the drive of slider, adjust spacing position, prevent that the test-tube rack from moving the change of route and making the test-tube rack break away from the transportation route, drop outside test-tube rack transportation equipment, improve spacing motion's reliability, promoted the user and experienced spacing motion's use.

Description

Limit movement mechanism, test tube rack transportation equipment and sample analyzer

Technical Field

The utility model relates to the technical field of sample analysis, in particular to a limiting movement mechanism, test tube rack conveying equipment and a sample analyzer.

Background

In the prior art, the test tube rack is transported during sample analysis, and the whole transportation equipment occupies a large space because the test tube rack can only be transported in a straight line. And the structure is complicated, and is poor to the spacing precision of test-tube rack, probably can lead to the test-tube rack to drop in transport mechanism at the in-process of transportation, causes equipment trouble, and the reliability is low.

Therefore, there is a need for an apparatus for limiting the rack during transport of the rack.

Disclosure of Invention

The utility model provides a limiting movement mechanism to solve the technical problems. The spacing motion is used for carrying the test-tube rack, includes:

a bottom plate;

the first guide rail is arranged on one side of the bottom plate;

the sliding block is arranged on the first guide rail;

the driving assembly is arranged on one side of the bottom plate and used for driving the sliding block to move along the first guide rail;

the limiting piece is used for limiting the transmission direction of the test tube rack, is connected to the sliding block and can move synchronously along with the sliding block to adjust the limiting position.

The test tube rack comprises a limiting piece and is characterized in that a bending part used for being abutted against the test tube rack is arranged on the limiting piece, and the bending part is arranged on one side, close to the test tube rack, of the limiting piece.

The limiting piece is further provided with a guide structure for guiding the test tube rack to move, and the guide structure is arranged at one end of the bending portion opposite to the test tube rack in the conveying direction.

The limiting movement mechanism further comprises a second guide rail, the second guide rail is connected to the sliding block, and the limiting piece is connected to the sliding block and/or the second guide rail.

Wherein, spacing motion still includes:

the fixed block is positioned at one end of the first guide rail far away from the sliding block;

the optocoupler is arranged on the fixed block and is provided with an optocoupler groove;

the optocoupler baffle is arranged on the sliding block;

the sliding block moves towards the fixed block along the first guide rail and drives the optical coupler baffle plate to enter the optical coupler groove, so that the optical coupler is matched with the optical coupler baffle plate.

Wherein the drive assembly comprises:

the motor is used for driving the sliding block to move along the first guide rail;

the pulleys are arranged on the bottom plate at intervals;

the synchronous belt is arranged around the pulleys and the motor, one end of the sliding block, which is close to the bottom plate, is arranged on the synchronous belt, and the motor drives the synchronous belt to drive, so that the sliding block is driven to move along the first guide rail.

The limiting movement mechanism comprises a track group, wherein the track group is arranged at intervals with the bottom plate, and is arranged along the extending direction of the first guide rail and used for transporting the test tube rack.

The track set comprises a first track and a second track, wherein the first track and the second track are arranged at intervals, and the first track and the second track are arranged in parallel with the first guide rail.

In order to solve the problems, the utility model also provides test tube rack conveying equipment which comprises a test tube rack, a pushing piece and the limiting movement mechanism;

the limiting movement mechanism comprises a third track, wherein the third track, the first track and the second track of the limiting movement mechanism are respectively arranged on two sides of the bottom plate, and the third track and the first guide rail are arranged in parallel and are used for changing the conveying direction of the test tube rack;

when the limiting piece is positioned at the first end of the first guide rail, the pushing piece pushes the test tube rack from the second rail to the third rail.

In order to solve the problems, the utility model also provides a sample analyzer, which comprises a sampling component, a detection component and the test tube rack conveying equipment, wherein the sampling component is arranged at intervals with the test tube rack conveying equipment, and the detection component is arranged at intervals with the sampling component;

the sampling assembly is used for extracting samples from test tube racks of the test tube rack conveying equipment and conveying the samples to the detection assembly for detection.

The utility model has the beneficial effects that: compared with the prior art, the limit movement mechanism comprises a bottom plate, a first guide rail, a sliding block, a driving assembly and a limit piece, wherein the first guide rail is arranged on one side of the bottom plate, the sliding block is arranged on the first guide rail, and the driving assembly is arranged on one side of the bottom plate and used for driving the sliding block to move along the first guide rail; the locating part is connected on the slider for the transmission direction of restriction test-tube rack, and can remove along first guide rail under the drive of slider, adjust spacing position, prevent that the test-tube rack from moving the change of route and making the test-tube rack break away from the transportation route, drop outside test-tube rack transportation equipment, improve spacing motion's reliability, promoted the user and experienced spacing motion's use.

Drawings

FIG. 1 is a schematic view of a first embodiment of a limit motion mechanism provided by the present utility model;

FIG. 2 is a schematic view of a second embodiment of a limit motion mechanism according to the present utility model;

FIG. 3 is a schematic view of a third embodiment of a limit movement mechanism according to the present utility model;

FIG. 4 is a schematic view of a first embodiment of a stop member according to the present utility model;

FIG. 5 is a schematic view of a fourth embodiment of a limit motion mechanism according to the present utility model;

fig. 6 is a schematic structural view of a first embodiment of the test tube rack transport apparatus provided by the present utility model.

Reference numerals: test tube rack transport equipment A; a limit movement mechanism 1; a bottom plate 10; a first rail 20; a slider 30; a drive assembly 40; a motor 41; a pulley 42; a timing belt 43; a stopper 50; a first end 51; a second end 52; a second guide rail 60; a fixed block 70; an optical coupler 81; an optocoupler baffle 82; a track set 90; a first rail 91; a second rail 92; a third rail 93; and a test tube rack 2.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The terms "first," "second," and the like in this disclosure are used for distinguishing between different objects and not for describing a particular sequential order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those listed steps or elements but may include other steps or elements not listed or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the prior art, the test tube rack used for biological experiments is generally transported by adopting a single track, and the track is arranged from the position of starting transportation to the position of ending transportation, but only can transport the test tube rack along one direction. Therefore, the track for transporting the test tube rack and other matched components thereof occupy larger space in the test tube rack transporting mechanism. And because there is not the subassembly that restricts the test-tube rack removal on the track, at the in-process of test-tube rack transportation, the test-tube rack can drop outside the track, causes the trouble to test-tube rack transport mechanism. Therefore, the utility model provides a limiting movement mechanism for limiting a test tube rack, and the limiting movement mechanism is described in detail below with reference to the accompanying drawings:

referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a limiting movement mechanism according to the present utility model. The limit movement mechanism 1 of the present utility model includes a base plate 10, a first guide rail 20, a slider 30, a driving assembly 40, and a limit member 50.

Wherein, the first guide rail 20 is installed at one side of the base plate 10, and the slider 30 is disposed on the first guide rail 20. The driving assembly 40 is disposed at one side of the base plate 10 for driving the slider 30 to move along the first guide rail 20. In the present embodiment, the driving assembly 40 may be disposed on the same side of the base plate 10 as the first rail 20, and in other embodiments, the driving assembly 40 may be disposed on a different side from the first rail 20.

The limiting piece 50 is connected to the sliding block 30 and is used for limiting the transmission direction of the test tube rack, and when the driving assembly 40 drives the sliding block 30 to move along the first guide rail 20, the sliding block 30 drives the limiting piece 50 to move along the first guide rail 20, so that the limiting piece 50 can adjust and limit the limiting position of the test tube rack.

The bottom plate 10 may be disposed at a distance parallel to the track for transporting the test tube rack, and the limiting member 50 may be moved along a direction parallel to the track because the limiting member 50 is disposed on the sliding block 30 and the sliding block 30 is disposed on the first guide rail 20 on one side of the bottom plate 10, and the first guide rail 20 is parallel to the track for transporting the test tube rack. Wherein, when the transportation has the test-tube rack on the track, the locating part 50 can follow the test-tube rack and remove, restrict the direction of transportation of test-tube rack, and because the locating part 50 is followed the test-tube rack and is removed, can in time adjust the spacing position that restricts the direction of transportation of test-tube rack, ensure that the test-tube rack steadily reaches the extreme point position.

Referring to fig. 2 and fig. 3, fig. 2 is a schematic structural diagram of a second embodiment of a limiting movement mechanism according to the present utility model; fig. 3 is a schematic structural view of a third embodiment of the limiting movement mechanism provided by the utility model. As shown in fig. 2, the position of the first rail 20 before the slider 30 starts moving is referred to as the initial position of the first rail 20, and the slider 30 and the stopper 50 are located at the initial position. As shown in fig. 3, the other end of the first rail 20 is the position reached after the sliding of the slider 30, which is denoted as the end point of the first rail 20, and the slider 30 and the stopper 50 are located at the end point.

The driving assembly 40 can drive the sliding block 30 to move along the first guide rail 20 from the initial position, and the limiting piece 50 can be driven by the sliding block 30 to move along the first guide rail 20, and when the sliding block 30 drives the limiting piece 50 to reach the final point of the first guide rail 20, the sliding block 30 stops moving. In this process, the stopper 50 follows the test tube rack from the initial position to the final position of the first guide rail 20, so that when the test tube rack is transported on the rail, the stopper 50 always adjusts the position of the stopper, and follows the movement of the test tube rack, so that the transportation direction of the test tube rack is limited, and the test tube rack is transported along the extending direction of the rail. In addition, as shown in fig. 2, in the initial position, the limiting piece 50 and the sliding block 30 are folded and arranged on one side of the bottom plate 10, so that the occupied space of the limiting movement mechanism 1 is reduced.

One end of the first guide rail 20 in the limiting movement mechanism 1 can be arranged at intervals with the position of the rail where the test tube rack starts to be transported, so that the moving track of the limiting piece 50 is parallel and synchronous with the moving track of the test tube rack, and the limiting piece 50 can move along with the test tube rack, and limits the transmission direction of the test tube rack.

The limit movement mechanism 1 is used for transporting test tube racks and comprises a bottom plate 10, a first guide rail 20, a sliding block 30, a driving assembly 40 and a limit piece 50. First guide rail 20, slider 30 and drive assembly 40 cooperate to realize that locating part 50 is following the test-tube rack and is removing, restrict the direction of transportation of test-tube rack, avoided the test-tube rack to drop on the track in the transportation, improve spacing motion 1's security, promote the user and experience spacing motion 1's use.

Alternatively, as shown in fig. 4, fig. 4 is a schematic structural view of a first embodiment of a limiting member provided by the present utility model.

Wherein, be provided with the portion of bending that is used for the butt test-tube rack on the locating part 50, the portion of bending sets up in the one side that locating part 50 is close to the test-tube rack to increase the area of contact of locating part 50 and test-tube rack, ensure the restriction of locating part 50 to test-tube rack transmission direction, promote the spacing reliability of locating part 50 to the test-tube rack.

Wherein, the bending part that one side that the locating part 50 is close to the test-tube rack set up, when the test-tube rack skew towards locating part 50, the bending part can be with the part of test-tube rack skew back orbital extending direction again.

And the stopper 50 is also provided with a guide structure for guiding the movement of the test tube rack, the guide structure being provided at one end of the bending portion opposite to the conveying direction of the test tube rack. In this embodiment, as shown in fig. 4, the guide structure is an inverted arc angle, so that when the test tube rack is offset toward the stopper 50, the guide structure can smoothly adjust the test tube rack from the offset direction to the extending direction of the rail without scratching the test tube rack. In other embodiments, the guide structure may be a reverse right angle, and the specific shape of the guide structure is not limited on the basis of realizing adjustment of the offset direction of the test tube rack.

In this embodiment, the limiting member 50 may include a first end 51 and a second end 52, where the first end 51 is spaced from the test tube rack when the limiting member 50 is in the initial position, and the second end 52 is located in front parallel to the moving direction of the test tube rack (i.e., the second end 52 is not spaced from the test tube rack). When the rail drives the test tube rack to transport, the driving assembly 40 also drives the limiting piece 50 to move along the moving direction of the test tube rack, at this time, the test tube rack gradually moves to the second end 52 of the limiting piece 50, when the test tube rack moves to the bending part between the first end 51 and the second end 52, if the test tube rack generates deflection in the previous transport, due to the fact that the guiding structure is arranged at one end of the bending part, the deflection part of the test tube rack is abutted with the guiding structure at one end of the bending part, and due to the fact that the moving speed of the test tube rack is high relative to the moving speed of the limiting piece 50, namely, the bending part can give a force opposite to the deflection direction of the test tube rack, the deflection part of the test tube rack is gradually pushed back to the extending direction of the rail, when the test tube rack moves to the second end 52, the deflection part is adjusted, and the test tube rack is still transported along the extending direction of the rail.

It is understood that in the present embodiment, the moving speed of the test tube rack (i.e., the transporting speed of the rail) is greater than the moving speed of the stopper 50. In other embodiments, the transporting speed of the test tube rack and the moving speed of the limiting member 50 may be reset according to the manner in which the limiting member 50 adjusts the offset portion of the test tube rack, which is not limited by the present utility model.

Optionally, as shown in fig. 1, the limit movement mechanism 1 further includes a second guide rail 60.

The second guide rail 60 is connected to the slider 30, and the limiting member 50 may be directly connected to the slider 30 or connected to the slider 30 through the second guide rail 60.

Alternatively, as shown in fig. 1 to 4, the limit movement mechanism 1 includes a fixed block 70, an optocoupler 81, and an optocoupler shutter 82.

The fixing block 70 is disposed at one end of the first rail 20 away from the slider 30, that is, a final point of the first rail 20, and is used for supporting the limiting member 50. When the slider 30 and the limiting member 50 are located at the first end (initial position) of the first guide rail 20, the second end 52 of the limiting member 50 is disposed on the fixed block 70, so that the limiting member 50 can be prevented from sagging due to gravity of the limiting member 50, and the limiting member 50 falls off on the second guide rail 60, thereby affecting the reliability of the limiting movement mechanism 1.

The optocoupler 81 is arranged on the fixed block 70, and the optocoupler 81 is provided with an optocoupler groove; the optocoupler baffle 82 is disposed on the slider 30.

In this embodiment, the slider 30 moves along the first guide rail 20 near the fixed block 70 (the slider 30 moves from the initial position to the final position), and simultaneously drives the stopper 50 and the optocoupler stopper 82 to move near the fixed block 70, and when the slider 30 reaches the final position, the slider 30 is adjacent to the fixed block 70. At this time, the optical coupler blocking piece 82 is inserted into the optical coupler groove of the optical coupler 81, the optical coupler 81 senses that the slider 30 reaches the final point, and transmits a signal to the driving assembly 40, and then the driving assembly 40 stops driving the slider 30.

Alternatively, as shown in fig. 1 to 3, the driving assembly 40 includes a motor 41, a pulley 42, and a timing belt 43.

The driving assembly 40 includes a plurality of pulleys 42, and the pulleys 42 are disposed on the base plate 10 at intervals; the motor 41 is arranged at intervals with the pulley 42; the timing belt 43 is provided around the plurality of pulleys 42 and the motor 41; and the synchronous belt 43 is in partial contact with the sliding block 30, and one end of the sliding block 30, which is close to the bottom plate 10, is arranged on the synchronous belt 43. The motor 41 drives the timing belt 43 to rotate around the pulley 42, thereby driving the slider 30 to move.

In the present embodiment, the motor 41 is started, the timing belt 43 rotates around the pulley 42, and the slider 30 is disposed on the timing belt 43, and then the slider 30 moves along with the timing belt 43. Since the slider 30 is disposed on the first guide rail 20, the slider 30 drives the optocoupler baffle 82 to approach the fixed block 70 along the first guide rail 20. When the sliding block 30 is adjacent to the fixed block 70, the optical coupler baffle 82 is inserted into the optical coupler groove, at this time, the optical coupler baffle 82 shields light in the optical coupler 81, the optical coupler 81 transmits a signal to the motor 41, the motor 41 stops driving the rotation of the synchronous belt 43, and the sliding block 30 stops moving.

Through the cooperation of opto-coupler 81 and opto-coupler separation blade 82, confirm that slider 30 reaches the terminal point of first guide rail 20, after slider 30 reaches the terminal point, motor 41 stops, avoids hold-in range 43 to rotate and causes wearing and tearing to slider 30, or slider 30 continues to be close to fixed block 70 and removes, causes the striking to fixed block 70 to influence the security of spacing motion 1.

Alternatively, as shown in fig. 5, fig. 5 is a schematic structural view of a fourth embodiment of a limiting movement mechanism provided by the present utility model. The limit movement mechanism 1 includes a track group 90.

The track set 90 is disposed at intervals with the bottom plate 10 and along the extending direction of the first guide rail 20, for transporting the test tube rack.

In this embodiment, the track set 90 includes a first track 91 and a second track 92, where the first track 91 and the second track 92 are spaced apart and are disposed parallel to the first guide rail 20, so as to ensure that the limiting member 50 can move along with the test tube rack transported on the first track 91 and the second track 92. The arrangement of the first rail 91 and the second rail 92 changes the traditional single rail transportation test tube rack, segments the transportation route of the test tube rack, and can effectively manage each section of the transportation route of the test tube rack; meanwhile, the distance of each section of transportation path is shortened, the maintenance difficulty of each track is reduced, and when a certain track fails, the track can be maintained independently, but not the track of the whole transportation path.

Meanwhile, one surface of the track group 90, which is in contact with the test tube rack, can be further made of frosted materials, so that friction force between the track group 90 and the test tube rack is increased, and the test tube rack is prevented from being transported under the driving of the track group 90, namely, the track group 90 and the test tube rack relatively move, but the test tube rack is relatively static with the ground, and the track group 90 cannot transport the test tube rack to other places. In other embodiments, the surface of the track set 90, which contacts the test tube rack, may be further provided with a component for fixing the test tube rack, for example, a rubber groove matched with the test tube rack in size, so that the track is not affected while the test tube rack is fixed, and the test tube rack is ensured to be transported under the drive of the track set 90. The utility model does not limit the specific arrangement of the surface of the rail, which is contacted with the test tube rack.

In summary, the limit motion mechanism 1 of the present utility model includes the base plate 10, the first rail 20, the slider 30, the driving assembly 40, the limiting member 50, the second rail 60, the fixing block 70, the optocoupler 81, the optocoupler baffle 82 and the track set 90. The driving assembly 40 drives the sliding block 30 to move along the first guide rail 20, so that the limiting piece 50 is driven to move along with the test tube rack transported on the track set 90, the transportation direction of the test tube rack is limited, the test tube rack is prevented from falling off on the track set, the reliability of the limiting movement mechanism 1 is improved, and the use experience of a user on the limiting movement mechanism 1 is improved.

The utility model also provides test tube rack conveying equipment, referring to fig. 5 and 6, and fig. 6 is a schematic structural diagram of a first embodiment of the test tube rack conveying equipment. The rack transport apparatus a includes a rack 2, a pusher (not shown), and a limit movement mechanism 1.

The limiting movement mechanism 1 further includes a third rail 93, where the third rail 93, the first rail 91 and the second rail 92 are respectively disposed on two sides of the base plate 10, that is, the first rail 91 and the second rail 92 are disposed on one side of the base plate 10, and the third rail 93 is disposed on the other side of the base plate 10. And the third rail 93 is disposed parallel to the first rail 91, and the transporting direction of the third rail 93 may be opposite to the transporting direction of the first rail 91, so that the transporting direction of the test tube rack can be changed when the test tube rack enters the third rail 93.

In this embodiment, the test tube rack 2 is placed on the first rail 91 to start to be transported, at this time, the limiting member 50 is located at the first end (initial position) of the first rail 20, the driving assembly 40 detects that the first rail 91 starts to transport the test tube rack 2, and then the driving slider 30 drives the limiting member 50 to move along the first rail 20, and the limiting member 50 limits the moving direction of the test tube rack 2 on the first rail 91. The distance between the first rail 91 and the second rail 92 is smaller than half the length of the rack 2, and when the rack 2 moves to the end of the first rail 91 near the second rail 92, the rack 2 moves forward, contacts the second rail 92 and is successfully transferred to the second rail 92, in the process, the stopper 50 still follows the rack 2, and when the rack 2 is completely located in the second rail 92, the stopper 50 is located at the second end (end point position) of the first rail 20. The second rail 92 may not move, and may serve as a platform for placing the test tube rack 2. In other embodiments, the transport direction of the second rail 92 may be the same as the first rail 91 to assist in transferring the rack 2 from the first rail 91 to the second rail 92.

After the stopper 50 moves along with the test tube rack 2 to reach the final point, the test tube rack 2 reaches the second rail 92, and the stopper 50 returns from the second end (final point) of the first rail 20 to the first end (initial point) of the first rail 20 to prepare for following the next test tube rack 2.

When the stopper 50 returns to the first end, as shown in fig. 6, there is no shielding between the second rail 92 and the third rail 93, and the pushing member pushes the test tube rack 2 from the second rail 92 to the third rail 93. Since the transport direction of the third rail 93 is different from the transport direction of the first rail 91, that is, the rack 2 completes the turning of the transport direction. In other embodiments, the transporting direction of the third rail 93 may be the same as the transporting direction of the first rail 91, so that the test tube rack 2 is continuously transported in the same direction.

The utility model also provides a sample analyzer (not shown) comprising a sampling assembly, a detection assembly and a test tube rack transport device A.

In this embodiment, the rack transport apparatus a transports the rack 2 containing the samples to the second rail 92, the sampling assembly may be disposed at an interval from the second rail 92, and the detection assembly may be disposed at an interval from the sampling assembly. The sampling assembly is used for extracting samples from the test tube rack 2 and conveying the samples to the detection assembly for detection. In this process, since the samples in the rack 2 have been extracted and the stopper 50 returns to the initial position to follow the next rack 2 containing samples, the pusher pushes the rack 2 on the second rail 92 to the third rail 93, and after the rack 2 having extracted the samples enters the third rail 93, it is transported to the recovery position. At the same time, a space is left on the second rail 92 to wait for the next rack 2 containing samples.

The foregoing description is only of embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and the drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the present utility model.

Claims (10)

1. The utility model provides a spacing motion, its characterized in that, spacing motion is used for carrying the test-tube rack, includes:

a bottom plate;

the first guide rail is arranged on one side of the bottom plate;

the sliding block is arranged on the first guide rail;

the driving assembly is arranged on one side of the bottom plate and used for driving the sliding block to move along the first guide rail;

the limiting piece is used for limiting the transmission direction of the test tube rack, is connected to the sliding block and can move synchronously along with the sliding block to adjust the limiting position.

2. The limiting movement mechanism according to claim 1, wherein the limiting member is provided with a bending portion for abutting against the test tube rack, and the bending portion is disposed on one side of the limiting member, which is close to the test tube rack.

3. The limit movement mechanism according to claim 2, wherein the limit member is further provided with a guide structure for guiding movement of the test tube rack, and the guide structure is provided at one end of the bending portion opposite to the conveying direction of the test tube rack.

4. The limit movement mechanism of claim 1, further comprising a second rail coupled to the slider, the stop being coupled to the slider and/or the second rail.

5. The limit motion mechanism of claim 1, further comprising:

the fixed block is positioned at one end of the first guide rail far away from the sliding block;

the optocoupler is arranged on the fixed block and is provided with an optocoupler groove;

the optocoupler baffle is arranged on the sliding block;

the sliding block moves towards the fixed block along the first guide rail and drives the optical coupler baffle plate to enter the optical coupler groove, so that the optical coupler is matched with the optical coupler baffle plate.

6. The limit motion mechanism of any one of claims 1-5, wherein the drive assembly comprises:

the motor is used for driving the sliding block to move along the first guide rail;

the pulleys are arranged on the bottom plate at intervals;

the synchronous belt is arranged around the pulleys and the motor, one end of the sliding block, which is close to the bottom plate, is arranged on the synchronous belt, and the motor drives the synchronous belt to drive, so that the sliding block is driven to move along the first guide rail.

7. The limit movement mechanism of claim 1, comprising a set of rails spaced from the base plate and disposed along a direction in which the first rail extends for transporting the test tube rack.

8. The limit motion mechanism of claim 7, wherein the track set comprises a first track and a second track, the first track is spaced apart from the second track, and the first track and the second track are both disposed parallel to the first rail.

9. A test tube rack transport apparatus, characterized in that the test tube rack transport apparatus comprises a test tube rack, a pushing member and the limit movement mechanism according to claims 1-8;

the limiting movement mechanism comprises a third track, wherein the third track, the first track and the second track of the limiting movement mechanism are respectively arranged on two sides of the bottom plate, and the third track and the first guide rail are arranged in parallel and are used for changing the conveying direction of the test tube rack;

when the limiting piece is positioned at the first end of the first guide rail, the pushing piece pushes the test tube rack from the second rail to the third rail.

10. A sample analyzer, comprising a sampling assembly, a detection assembly, and the rack transport device of claim 9, the sampling assembly being spaced from the rack transport device, the detection assembly being spaced from the sampling assembly;

the sampling assembly is used for extracting samples from test tube racks of the test tube rack conveying equipment and conveying the samples to the detection assembly for detection.