Sample adding arm

Abstract

The utility model discloses a sample adding arm which comprises a bracket, an optical shaft, a first bearing sleeved on the optical shaft, a linear guide rail assembly, a lifting mechanism and a horizontal rotating mechanism, the device is simple in structure and low in cost; compared with an existing spline pair which mainly adopts imported raw materials and is high in cost, the spline pair is replaced by the optical shaft and the linear guide rail, assembly cost is greatly reduced, and considerable economic benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of detection devices, in particular to a sample adding arm. Background Art

[0002] Medical and food testing devices on the market are instruments used to measure certain chemical components in blood, other body fluids or food. The analyzer automates the steps of sampling, adding reagents, and testing in the analysis process. It is currently widely used in hospitals and epidemic prevention stations at all levels. The sample arm is one of the main components of the analyzer, which is used to drive the sample needle or stirring rod to complete the transfer, filling, stirring and other functions of the liquid. The sample arm mainly realizes the functions of vertical lifting and horizontal rotation.

[0003] The current loading arm structure on the market mainly uses a spline pair structure to achieve vertical lifting and horizontal rotation functions. This type of loading arm has a complex structure, and the core material spline pair is basically imported, which is expensive and has high component costs, and does not make use of domestic substitution.

[0004] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sample adding arm, reduce the cost of components, and facilitate domestic substitution and batch production.

[0006] The technical solution of the utility model is as follows: a sample loading arm is provided, comprising: a bracket, an optical axis, a first bearing sleeved on the optical axis, a linear guide assembly, a lifting mechanism and a horizontal rotating mechanism. The lifting mechanism is used to realize the vertical movement of the optical axis, and the horizontal rotating structure is used to realize the horizontal rotation of the optical axis.

[0007] Furthermore, the lifting mechanism includes: a lifting motor mounted on the bracket, and a first synchronous pulley assembly; the first synchronous pulley assembly includes: a first driving wheel connected to the output shaft of the lifting motor, a first synchronous wheel mounted on the bracket, and a first synchronous belt sleeved on the first synchronous wheel and the first driving wheel. When the lifting motor is running, the first driving wheel is driven to rotate, thereby realizing the movement of the first synchronous belt.

[0008] Furthermore, the horizontal rotation mechanism includes: a horizontal rotation motor mounted on the bracket, a second synchronous pulley assembly; the second synchronous pulley assembly includes: a second driving wheel connected to the output shaft of the horizontal rotation motor, a second synchronous wheel mounted on the bracket, and a second synchronous belt sleeved on the second synchronous wheel and the second driving wheel. The horizontal rotation motor runs, driving the second driving wheel to rotate, thereby realizing the movement of the second synchronous belt.

[0009] Furthermore, the linear guide assembly includes: a second bearing mounted on the bracket, a guide rail connecting the outer ring of the second bearing and the second synchronous wheel, a slider matched with the guide rail, and a fixing member connected with the slider. Since the guide rail is connected with the outer ring of the second bearing and the second synchronous wheel, the use of the guide rail and the slider can make the optical axis more stable when moving without deviation.

[0010] Furthermore, the fixing member is connected to the optical axis. When the horizontal rotary motor is running, the second synchronous wheel will be driven to rotate, thereby driving the guide rail to rotate. Since the fixing member is connected to the optical axis, the rotation of the optical axis is realized.

[0011] Furthermore, the outer ring of the first bearing is connected to the first synchronous belt via a connecting piece, thereby pulling the optical axis to move.

[0012] Furthermore, the lifting mechanism further comprises: a first photoelectric sensor, the moving track of the connecting member overlaps with the sensing area of ​​the first photoelectric sensor, and the first photoelectric sensor is used to know whether the optical axis has dropped to a proper position.

[0013] Furthermore, the horizontal rotation mechanism further comprises: a rotating member connected to the second synchronous wheel, a second photoelectric sensor mounted on the bracket, and the moving trajectory of the rotating member overlaps with the sensing area of ​​the second photoelectric sensor. The second photoelectric sensor is used to detect that the rotating member starts to rotate, that is, the optical axis starts to rotate.

[0014] Furthermore, the horizontal rotation mechanism further comprises: a third photoelectric sensor mounted on the bracket, the rotating member is provided with a positioning groove, and the moving trajectory of the positioning groove overlaps with the sensing area of ​​the third photoelectric sensor. The third photoelectric sensor and the positioning groove are used to obtain the rotation angle of the rotating member, thereby obtaining the rotation angle of the optical axis, so that the optical axis can be rotated to an appropriate position.

[0015] Furthermore, the horizontal rotation mechanism is arranged on the top of the bracket.

[0016] The sample loading arm further includes: a linear bearing mounted on the second synchronous wheel, and the optical axis passes through the linear bearing.

[0017] By adopting the above scheme, the utility model provides a sample adding arm with simple structure and low cost. Compared with the current spline pair which mainly uses imported raw materials and has high cost, the utility model uses an optical axis and a linear guide to replace the spline pair, which greatly reduces the component cost and achieves considerable economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic structural diagram of an embodiment from another perspective. DETAILED DESCRIPTION

[0020] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] See also Figure 1 and Figure 2 This embodiment provides a sample loading arm, including: a bracket 10, an optical axis 11, a first bearing 12 sleeved on the optical axis 11, a linear guide assembly, a lifting mechanism and a horizontal rotating mechanism.

[0022] The lifting mechanism includes: a lifting motor 13 installed on the bracket 10, and a first synchronous pulley assembly; the first synchronous pulley assembly includes: a first driving wheel 14 connected to the output shaft of the lifting motor 13, a first synchronous wheel 15 installed on the bracket 10, and a first synchronous belt 16 sleeved on the first synchronous wheel 15 and the first driving wheel 14.

[0023] The horizontal rotation mechanism includes: a horizontal rotation motor 17 installed on the bracket 10, and a second synchronous pulley assembly; the second synchronous pulley assembly includes: a second driving wheel 18 connected to the output shaft of the horizontal rotation motor 17, a second synchronous wheel 19 installed on the bracket 10, and a second synchronous belt 20 sleeved on the second synchronous wheel 19 and the second driving wheel 18.

[0024] The linear guide assembly includes: a second bearing 21 mounted on the bracket 10 , a guide rail 28 connecting the outer ring of the second bearing 21 and the second synchronous wheel, a slider 29 matched with the guide rail 28 , and a fixing member 30 connected to the slider 29 .

[0025] The fixing member is connected to the optical axis 11. When the horizontal rotary motor 17 is running, the second synchronous wheel 19 is driven to rotate, thereby driving the guide rail 28 to rotate. Since the fixing member 30 is connected to the optical axis 11, the rotation of the optical axis 11 is realized.

[0026] The outer ring of the first bearing 12 is connected to the first synchronous belt 16 via a connecting member 24, thereby pulling the optical axis to move.

[0027] In this embodiment, the lifting mechanism further includes: a first photoelectric sensor 23 , and the moving trajectory of the connecting member 24 overlaps with the sensing area of ​​the first photoelectric sensor 23 .

[0028] In this embodiment, the horizontal rotation mechanism further includes: a rotating member 25 connected to the second synchronous wheel 19 , and a second photoelectric sensor 26 installed on the bracket 10 , and the moving trajectory of the rotating member 25 overlaps with the sensing area of ​​the second photoelectric sensor 26 .

[0029] In this embodiment, the horizontal rotation mechanism further includes: a third photoelectric sensor 27 installed on the bracket 10 , and the rotating member 25 is provided with a positioning groove, and the moving trajectory of the positioning groove overlaps with the sensing area of ​​the third photoelectric sensor 27 .

[0030] In this embodiment, the horizontal rotation mechanism is disposed on the top of the bracket 10 .

[0031] The loading arm further includes: a linear bearing 31 mounted on the second synchronous wheel 19 , and the optical axis 11 passes through the linear bearing 31 .

[0032] In summary, the utility model provides a sample adding arm with simple structure and low cost. Compared with the current spline pair which mainly uses imported raw materials and has high cost, the utility model uses an optical axis and a linear guide to replace the spline pair, which greatly reduces the component cost and achieves considerable economic benefits.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sample loading arm, characterized in that: include: A bracket, an optical axis, a first bearing sleeved on the optical axis, a linear guide assembly, a lifting mechanism and a horizontal rotating mechanism; The lifting mechanism comprises: a lifting motor mounted on the bracket, and a first synchronous pulley assembly; the first synchronous pulley assembly comprises: a first driving wheel connected to the output shaft of the lifting motor, a first synchronous wheel mounted on the bracket, and a first synchronous belt sleeved on the first synchronous wheel and the first driving wheel; The horizontal rotation mechanism comprises: a horizontal rotation motor mounted on the bracket, and a second synchronous pulley assembly; the second synchronous pulley assembly comprises: a second driving wheel connected to the output shaft of the horizontal rotation motor, a second synchronous wheel mounted on the bracket, and a second synchronous belt sleeved on the second synchronous wheel and the second driving wheel; The linear guide assembly comprises: a second bearing mounted on the bracket, a guide rail connecting the outer ring of the second bearing and the second synchronous wheel, a slider matched with the guide rail, and a fixing member connected with the slider; The fixing member is connected to the optical axis; The outer ring of the first bearing is connected to the first synchronous belt through a connecting piece.

2. A sample loading arm according to claim 1, characterized in that: The lifting mechanism further includes: a first photoelectric sensor, and the moving trajectory of the connecting member overlaps with the sensing area of ​​the first photoelectric sensor.

3. A sample loading arm according to claim 1, characterized in that: The horizontal rotation mechanism further includes: a rotating member connected to the second synchronous wheel, and a second photoelectric sensor installed on the bracket, and a moving track of the rotating member overlaps with a sensing area of ​​the second photoelectric sensor.

4. A sample loading arm according to claim 3, characterized in that: The horizontal rotation mechanism further includes: a third photoelectric sensor mounted on the bracket, the rotating member is provided with a positioning groove, and the moving track of the positioning groove overlaps with the sensing area of ​​the third photoelectric sensor.

5. A sample loading arm according to claim 1, characterized in that: The horizontal rotation mechanism is arranged on the top of the bracket.

6. A sample loading arm according to claim 1, characterized in that: Also includes: A linear bearing is mounted on the second synchronous wheel, and the optical axis passes through the linear bearing.

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