Leveling structure and pipetting equipment with leveling structure

Abstract

This utility model discloses a leveling structure and a pipetting device with a leveling structure. The leveling structure includes a substrate, a reference point assembly, at least two universal leveling components, and a connecting plate. The connecting plate is angularly adjustable to the substrate via the reference point assembly and the universal leveling components. The reference point assembly and the at least two universal leveling components are spaced apart. This utility model's leveling structure and pipetting device with a leveling structure can conveniently and accurately adjust the angle between the leveled structure and the substrate.

Description

Technical Field

[0001] This utility model belongs to the technical field of pipetting equipment, and particularly relates to a leveling structure and a pipetting device with a leveling structure. Background Technology

[0002] Existing pipetting equipment has its moving arm directly fixed to the frame. However, due to manufacturing and assembly errors, the moving arm cannot be precisely perpendicular to the frame and may tilt vertically or horizontally, thus affecting the normal use of the pipetting equipment. It also has the following problems:

[0003] 1. Insufficient stability during transportation: When a pipette arm lacks a leveling function, it may experience internal liquid residue or mechanical structure misalignment if subjected to bumps or tilting during transportation, affecting subsequent use. After repeated handling, an unleveled pipette arm may experience uneven stress, leading to wear or deformation of critical components (such as guide rails and seals).

[0004] 2. Poor adaptability during exhibitions or demonstrations: When the booth floor is uneven or the temporary setting environment is unstable, the liquid level control of the pipette arm may be inaccurate, leading to demonstration failure (such as liquid dripping or inconsistent liquid aspiration). It is also difficult to quickly adapt to experimental tables or display racks of different heights, affecting operational convenience.

[0005] 3. Poor accuracy: If the pipette arm is not leveled, the tip may not be in perpendicular contact with the liquid surface, leading to: inaccurate aspirated volume (e.g., air contamination); increased residual volume during dispensing (especially for viscous liquids). For high-precision experiments (such as PCR and cell sorting), even slight angular deviations can result in poor reproducibility (increased CV value).

[0006] 4. Decreased long-term stability: Uneven stress on the mechanical structure over a long period of time may lead to accelerated wear of the guide rails, affecting the Z-axis movement accuracy. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the present invention aims to provide a leveling structure and a pipetting device with a leveling structure, which can conveniently and accurately adjust the angle between the leveled structure and the substrate.

[0008] To achieve the above objectives, this utility model provides a leveling structure, including a base plate, a reference point assembly, at least two universal leveling assemblies, and a connecting plate; the connecting plate is angularly connected to the base plate through the reference point assembly and the universal leveling assemblies; the reference point assembly and the at least two universal leveling assemblies are spaced apart.

[0009] In one embodiment, the universal leveling assembly includes a custom stud, a third spherical washer, and a first bolt. The outer wall of the custom stud has an external thread, a first through hole along the axial direction, and the top of the custom stud has an arc surface that mates with the third spherical washer. At least two stud mounting grooves are formed on the side of the base plate adjacent to the connecting plate, and the inner wall of the stud mounting groove has an internal thread that mates with the external thread. The custom stud is screwed into the stud mounting groove through the external thread and the internal thread. The third spherical washer is placed between the top of the custom stud and the connecting plate. The connecting plate has at least two first connecting holes. The first bolt passes through the first connecting hole, the third spherical washer, and the first through hole in sequence and is screwed into the base plate.

[0010] In one embodiment, the reference point assembly includes a second spherical washer assembly and a second bolt; the second spherical washer assembly includes a first spherical washer and a second spherical washer that cooperate with each other; the first spherical washer is fixed to the side of the substrate adjacent to the connecting plate; the second spherical washer cooperates with the first spherical washer and is placed between the first spherical washer and the connecting plate; the connecting plate forms a second connecting hole; the second bolt passes through the second connecting hole, the second spherical washer and the first spherical washer in sequence and is screwed into a second screw hole formed on the substrate or passes through a third through hole formed on the substrate and is screwed into a second nut.

[0011] In one embodiment, the connecting plate forms at least two first receiving grooves on one side adjacent to the substrate, corresponding to the position of the custom stud; the third spherical washer and part of the custom stud are received in the first receiving grooves.

[0012] In one embodiment, the substrate forms a first screw hole on the bottom surface of the stud mounting groove; the first bolt passes through the first connecting hole, the third spherical washer, and the first through hole in sequence and is screwed into the first screw hole; or the substrate forms a second through hole on the bottom surface of the stud mounting groove; the first bolt passes through the first connecting hole, the third spherical washer, the first through hole, and the second through hole in sequence and is screwed into a first nut.

[0013] In one embodiment, the top of the customized stud is formed with a wrench groove and the wrench groove communicates with the first through hole.

[0014] In one embodiment, the universal leveling assembly further includes a first spherical washer assembly; the first spherical washer assembly is disposed between the side of the connecting plate away from the base plate and the end of the first bolt.

[0015] In one embodiment, a second receiving groove is formed on the side of the connecting plate adjacent to the substrate, corresponding to the position of the first spherical washer; the second spherical washer is wholly or partially received in the second receiving groove.

[0016] In one embodiment, the reference point assembly further includes a third spherical washer assembly; the third spherical washer assembly is disposed between the side of the connecting plate away from the substrate and the end of the second bolt.

[0017] This utility model discloses a pipetting device with a leveling structure, comprising the leveling structure described herein, the frame, and the leveled structure; the base plate is fixed on the frame; the leveled structure is connected to the connecting plate; the leveled structure includes a pipetting arm.

[0018] The beneficial effects of this utility model due to the adoption of the above technical solutions include:

[0019] The use of a reference point assembly and at least two universal leveling assemblies enables angle adjustment between the connecting plate and the base plate. The custom stud is screwed into the stud mounting slot via external and internal threads. The height of the custom stud protruding from the base plate can be adjusted by rotating it, thus adjusting the angle of the connecting plate within the plane of the reference point assembly. The top of the custom stud forms an arc surface that mates with the third spherical washer, enabling universal adjustment of the connecting plate angle. The first receiving groove makes the structure between the connecting plate and the base plate more compact, improving structural integration. The first screw hole is used for screwing the first bolt to the base plate, saving connection space compared to a nut connection. The wrench groove allows for convenient height adjustment of the custom stud by rotating it with a wrench. The first spherical washer set compensates for angular deviation between the connecting plate and the first bolt. The second spherical washer set, in conjunction with the universal leveling assembly, further enables universal adjustment of the connecting plate angle. The second receiving groove makes the structure between the connecting plate and the base plate more compact, improving structural integration. The third set of spherical washers is used to compensate for the angular deviation between the connecting plate and the second bolt.

[0020] In addition, the pipetting device using the leveling structure of this application also has the following beneficial effects:

[0021] 1. High stability during transportation: When the pipette arm has a leveling function, it will not cause internal liquid residue or mechanical structure displacement if it is bumped or tilted during transportation, thus affecting subsequent use. After repeated handling, the leveled pipette arm will not cause wear or deformation of key components (such as guide rails and seals) due to uneven force.

[0022] 2. High adaptability to exhibitions or demonstrations: When the exhibition booth floor is uneven or the temporary placement environment is unstable, the liquid level control of the pipette arm may be inaccurate, leading to demonstration failure (such as liquid dripping or inconsistent liquid aspiration). This problem is solved by adopting a leveling structure. It can quickly adapt to experimental tables or display racks of different heights without affecting the ease of operation.

[0023] 3. High accuracy: The pipette arm is leveled to ensure the tip makes perpendicular contact with the liquid surface, guaranteeing accurate liquid volume aspiration. It also minimizes residual liquid during dispensing. For high-precision experiments (such as PCR and cell sorting), it prevents poor reproducibility caused by minute angular deviations.

[0024] 4. Strong long-term stability: The adoption of the leveling structure ensures that the mechanical structure is subjected to uniform force, prevents the guide rail from wearing out, and guarantees the Z-axis movement accuracy. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the connection structure between the leveled structure and the leveling structure in an embodiment of this application;

[0027] Figure 2 This is an exploded view of the connection structure between the leveled structure and the leveling structure in the embodiments of this application;

[0028] Figure 3 This is an exploded view of the leveling structure in the embodiments of this application;

[0029] Figure 4 This is a cross-sectional view of the connection structure between the reference point component and the universal leveling component in the embodiments of this application.

[0030] Explanation of icon numbers:

[0031] 1-Substrate;

[0032] 2-Reference point assembly;

[0033] 21-Second spherical washer set; 22-Second bolt; 211-First spherical washer; 212-Second spherical washer; 23-Third spherical washer set;

[0034] 3-Universal leveling assembly;

[0035] 31-Custom stud; 32-Third spherical washer; 33-First bolt; 34-Wrench groove; 35-First spherical washer assembly;

[0036] 4-Connecting plate;

[0037] 5- The structure being leveled. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "center," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "setting," "connection," "linking," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Example 1

[0042] Please see Figures 1-4 A leveling structure according to Embodiment 1 of this utility model includes a base plate 1, a reference point assembly 2, at least two universal leveling assemblies 3, and a connecting plate 4; one end of a structure to be leveled 5 is vertically connected to the connecting plate 4; the connecting plate 4 is angularly adjustable to the base plate 1 through the reference point assembly 2 and the universal leveling assemblies 3; the base plate 1 is connected to a frame; the reference point assembly and at least two of the universal leveling assemblies 3 are spaced apart; the leveling structure is applied to a pipetting device to achieve a leveling connection between the structure to be leveled and the frame.

[0043] In this embodiment, three universal leveling components 3 are used; by using the reference point component 2 and two universal leveling components 3, the angle adjustment between the connecting plate 4 and the base plate 1 is realized; another universal leveling component 3 provides auxiliary support.

[0044] The universal leveling assembly 3 includes a custom stud 31, a third spherical washer 32, and a first bolt 33. The custom stud 31 has an external thread on its outer wall, a first through hole along the axial direction, and an arc surface at its top that mates with the third spherical washer 32. At least two stud mounting grooves are formed on the side of the base plate 1 adjacent to the connecting plate 4, and an internal thread mates with the external thread on the inner wall of the stud mounting groove. The custom stud 31 is screwed into the stud mounting groove through the external thread and the internal thread. The third spherical washer 32 is placed between the top of the custom stud 31 and the connecting plate 4. The connecting plate 4 has at least two first connecting holes. The first bolt 33 passes through the first connecting hole, the third spherical washer 32, and the first through hole in sequence and is screwed into the base plate 1.

[0045] The top of the customized stud 31 forms an arc surface that mates with the third spherical washer 32, enabling universal adjustment of the angle of the connecting plate 4.

[0046] The substrate 1 forms a first screw hole on the bottom surface of the stud mounting groove; the first bolt 33 passes through the first connecting hole, the third spherical washer 32 and the first through hole in sequence and is screwed into the first screw hole.

[0047] The first screw hole is used for the screw connection of the first bolt 33 to the base plate 1, which saves the connection space of the nut compared to the nut connection.

[0048] The top of the custom stud 31 forms a wrench groove 34, and the wrench groove 34 communicates with the first through hole.

[0049] The custom stud 31 is screwed into the stud mounting groove via the external and internal threads. The height of the custom stud 31 protruding from the base plate 1 can be adjusted by rotating it, thus adjusting the angle of the connecting plate 4 in the plane of the reference point assembly 2. The wrench slot 34 allows for convenient height adjustment of the custom stud 31 by rotating it with a wrench.

[0050] The custom stud 31 is screwed into the stud mounting groove via the external thread and the internal thread. At the top of the custom stud 31 (i.e., one side of the arc surface), there is an internal hex wrench groove 34. This wrench groove 34 is provided for rotating and adjusting the custom stud 31. The height of the custom stud 31 protruding from the base plate 1 can be adjusted by rotating the custom stud 31 through the cooperation of the wrench and the wrench groove 34. This, together with the reference point assembly 2, enables the adjustment of the angle of the connecting plate 4 in the plane where the reference point assembly 2 is located.

[0051] The reference point assembly 2 includes a second spherical washer assembly 21 and a second bolt 22; the second spherical washer assembly 21 includes a first spherical washer 211 and a second spherical washer 212 that cooperate with each other; the first spherical washer 211 is fixed to the side of the substrate 1 adjacent to the connecting plate 4; the second spherical washer 212 cooperates with the first spherical washer 211 and is placed between the first spherical washer 211 and the connecting plate 4; the connecting plate 4 forms a second connecting hole; the second bolt 22 passes through the second connecting hole, the second spherical washer 212 and the first spherical washer 211 in sequence and is screwed into the second screw hole formed on the substrate 1.

[0052] The second spherical washer assembly 21 is used in conjunction with the universal leveling assembly 3 to achieve universal adjustment of the angle of the connecting plate 4.

[0053] A pipetting device with a leveling structure according to an embodiment of the present invention includes the leveling structure described in this embodiment, the frame, and the leveled structure 5; the base plate 1 is fixed on the frame; the leveled structure 5 is connected to the connecting plate 4; the leveled structure 5 includes a pipetting arm.

[0054] A leveling method based on the leveling structure described in this embodiment of the present invention includes the following steps:

[0055] S1: Start leveling the leveling structure in the leveling state, where the second bolt 22, the third spherical washer group 23, the first bolt, and the first spherical washer group 35 are not installed on the leveling structure in the leveling state.

[0056] S2: Bring the connecting plate 4 close to the substrate 1 until the connecting plate 4 and the second spherical washer 212 are in complete contact with the first spherical washer 211, and use tooling or angle measuring tools to adjust the connecting plate 4 to the final required position.

[0057] S3: Install the second bolt 22 and the third spherical washer assembly 23, and lock the reference point assembly 2;

[0058] S4: Adjust the universal leveling component 3. Use a wrench to pass through the first connecting hole and the third spherical washer 32 corresponding to the universal leveling component 3, and insert it into the wrench groove 34 at the top of the custom stud 31. Then rotate the Allen wrench to rotate the custom stud 31 and adjust the height of the custom stud 31 protruding from the base plate 1 until the arc surface at the top of the custom stud 31 is in complete contact with the arc surface of the third spherical washer 32. In the default state, the custom stud 31 is installed to the bottom in the stud mounting groove on the base plate 1. Therefore, the adjustment here is usually to make the custom stud 31 protrude more outward relative to the base plate 1. In addition, a torque wrench can be used to determine whether the arc surface is in complete contact.

[0059] S5: Assemble the first spherical washer group 35 and the first bolt 33 of the current universal leveling assembly 3; the first spherical washer group 35 is placed between the side of the connecting plate 4 away from the base plate 1 and the end of the first bolt 33; tighten the first bolt 33;

[0060] S6: Repeat steps S4 and S5 to adjust the remaining universal leveling components 3 in sequence until all universal leveling components 3 have been adjusted.

[0061] Example 2

[0062] The leveling structure of Embodiment 2 of this utility model is basically the same as that of Embodiment 1. The difference is that the connecting plate 4 forms at least two first receiving grooves on the side adjacent to the substrate, corresponding to the position of the customized stud 31; the third spherical washer 32 and part of the customized stud 31 are received in the first receiving grooves.

[0063] The connecting plate 4 has a second receiving groove on the side adjacent to the base plate 1, corresponding to the position of the first spherical washer 211; the second spherical washer 212 is wholly or partially received in the second receiving groove.

[0064] The use of the first and second receiving grooves makes the structure between the connecting plate 4 and the base plate 1 more compact and improves the integration of the structure.

[0065] Example 3

[0066] The leveling structure of Embodiment 3 of this utility model is basically the same as that of Embodiment 2. The difference is that the base plate 1 forms a second through hole on the bottom surface of the stud mounting groove; the first bolt 33 passes through the first connecting hole, the third spherical washer 32, the first through hole and the second through hole in sequence and is screwed to a first nut.

[0067] The second bolt 22 passes through the second connecting hole, the second spherical washer 212 and the first spherical washer 211 in sequence, and then passes through the third through hole formed in the substrate 1 and is screwed to a second nut.

[0068] Example 4

[0069] The leveling structure of Embodiment 4 of this utility model is basically the same as that of Embodiment 3, except that the top of the customized stud 31 has an external hexagonal feature on the outer side.

[0070] The use of external hexagonal features facilitates the adjustment of the height of the custom stud 31.

[0071] Example 5

[0072] The leveling structure of Embodiment 5 of this utility model is basically the same as that of Embodiment 3, except that the universal leveling component 3 further includes a first spherical washer group 35; the first spherical washer group 35 is placed between the side of the connecting plate 4 away from the base plate 1 and the end of the first bolt 33.

[0073] The reference point assembly 2 further includes a third spherical washer assembly 23; the third spherical washer assembly 23 is placed between the side of the connecting plate 4 away from the base plate 1 and the end of the second bolt 22.

[0074] The first spherical washer group 35 is used to compensate for the angular deviation between the connecting plate 4 and the first bolt 33. The third spherical washer group 23 is used to compensate for the angular deviation between the connecting plate 4 and the second bolt 22.

[0075] Example 6

[0076] The leveling structure of Embodiment Six of this utility model is basically the same as that of Embodiment Five, except that in this embodiment, two universal leveling components 3 are used.

[0077] The present invention has been described in detail above with reference to the accompanying drawings and embodiments. Those skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention, and the scope of protection of the present invention shall be defined by the appended claims.

Claims

1. A leveling structure, characterized in that, It includes a substrate (1), a reference point assembly (2), at least two universal leveling assemblies (3) and a connecting plate (4); the connecting plate (4) is angularly connected to the substrate (1) through the reference point assembly (2) and the universal leveling assembly (3); the reference point assembly (2) and the at least two universal leveling assemblies (3) are spaced apart.

2. The leveling structure according to claim 1, characterized in that, The universal leveling assembly (3) includes a custom stud (31), a third spherical washer (32), and a first bolt (33); the custom stud (31) has an external thread on its outer wall, a first through hole along the axial direction, and an arc surface at its top end that mates with the third spherical washer (32); the base plate (1) has at least two stud mounting grooves on one side adjacent to the connecting plate (4), and the inner wall of the stud mounting grooves has an internal thread that mates with the external thread; the custom stud (31) is screwed into the stud mounting groove through the external thread and the internal thread; the third spherical washer (32) is placed between the top end of the custom stud (31) and the connecting plate (4); the connecting plate (4) has at least two first connecting holes; the first bolt (33) passes through the first connecting hole, the third spherical washer (32), and the first through hole in sequence and is screwed into the base plate (1).

3. The leveling structure according to claim 2, characterized in that, The reference point assembly (2) includes a second spherical washer assembly (21) and a second bolt (22); the second spherical washer assembly (21) includes a first spherical washer (211) and a second spherical washer (212) that cooperate with each other; the first spherical washer (211) is fixed to the side of the substrate (1) adjacent to the connecting plate (4); the second spherical washer (212) cooperates with the first spherical washer (211) and is placed between the first spherical washer (211) and the connecting plate (4); the connecting plate (4) forms a second connecting hole; the second bolt (22) passes through the second connecting hole, the second spherical washer (212) and the first spherical washer (211) in sequence and is screwed into the second screw hole formed by the substrate (1) or passes through the third through hole formed by the substrate (1) and is screwed into a second nut.

4. The leveling structure according to claim 2, characterized in that, The connecting plate (4) forms at least two first receiving grooves on one side adjacent to the base plate (1) corresponding to the position of the custom stud (31); the third spherical washer (32) and part of the custom stud (31) are received in the first receiving grooves.

5. The leveling structure according to claim 2, characterized in that, The substrate (1) forms a first screw hole on the bottom surface of the stud mounting groove; the first bolt (33) passes through the first connecting hole, the third spherical washer (32) and the first through hole in sequence and is screwed into the first screw hole; or the substrate (1) forms a second through hole on the bottom surface of the stud mounting groove; the first bolt (33) passes through the first connecting hole, the third spherical washer (32), the first through hole and the second through hole in sequence and is screwed into a first nut.

6. The leveling structure according to claim 2, characterized in that, The top of the custom stud (31) forms a wrench groove (34) and the wrench groove (34) communicates with the first through hole.

7. The leveling structure according to claim 2, characterized in that, The universal leveling assembly (3) further includes a first spherical washer assembly (35); the first spherical washer assembly (35) is placed between the side of the connecting plate (4) away from the base plate (1) and the end of the first bolt (33).

8. The leveling structure according to claim 3, characterized in that, The connecting plate (4) has a second receiving groove on the side adjacent to the substrate (1) that corresponds to the position of the first spherical washer (211); the second spherical washer (212) is wholly or partially received in the second receiving groove.

9. The leveling structure according to claim 3, characterized in that, The reference point assembly (2) further includes a third spherical washer assembly (23); the third spherical washer assembly (23) is placed between the side of the connecting plate (4) away from the base plate (1) and the end of the second bolt (22).

10. A pipetting device with a leveling structure, characterized in that, It includes a frame, a leveling structure (5) and a leveling structure as described in any one of claims 1-9; the base plate (1) is fixed to the frame; the leveling structure (5) is connected to the connecting plate (4); the leveling structure (5) includes a pipette arm.

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