Cover opening and closing screwing mechanism for fixed torsion forehead sample tube

Abstract

The utility model discloses a fixed-torsion sample tube opening and closing cover screwing mechanism which is used for screwing a sample tube cover with a spline groove. The machine comprises a frame with a main console, a motor base arranged at one end of the frame, an assembling frame arranged at one end of the motor base, a plurality of rotating motors arranged on the assembling frame, an inserting column arranged at one end of each rotating motor and provided with a connecting block, a screwing head inserted into one end of the inserting column, and an inserting part arranged at one end of the screwing head and provided with a plurality of flower grooves. The positioning boss is arranged at one end of the insertion part; wherein the rotating motor is connected with a main console through a wire, one end of the screwing head is provided with a connecting groove used for being connected with the inserting column in an inserting mode, a limiting block used for being connected with the connecting block in an abutting mode is arranged in the connecting groove, the inserting column can rotate in the connecting groove, and a partition block is arranged between any two adjacent flower grooves. A curved surface is arranged at one end, close to the positioning boss, of the spacer block; position deviation between the sample tube cover and the screwing head can be compatible, smooth insertion of the screwing head is achieved, and the operation difficulty of a user is reduced.

Description

Technical Field

[0001] This utility model relates to the field of industrial equipment technology, specifically to a fixed torque sample tube switch cap screwing mechanism. Background Technology

[0002] With the rapid development of biotechnology and medicine, automated sample processing systems have become crucial for improving experimental efficiency and reducing human error. However, traditional automated capping devices often suffer from complex structures and difficult control, leading to potential misalignment of sample tubes during automated processing due to minor errors in the delivery system or manufacturing tolerances of the tubes themselves. This can result in the screwdriver not accurately aligning with the cap groove. If the screwdriver is not properly aligned, insertion becomes difficult and may damage the equipment, such as causing screwdriver wear or motor overload. Furthermore, misalignment between the screwdriver and the cap groove can lead to sample leakage or contamination, severely impacting experimental results.

[0003] Therefore, it is necessary to provide a new technical solution to overcome the above-mentioned defects. Utility Model Content

[0004] The purpose of this utility model is to provide a fixed torque sample tube switch cap screwing mechanism that can effectively solve the above-mentioned technical problems.

[0005] To achieve the purpose of this utility model, the following technical solution is adopted:

[0006] A fixed torque sample tube switch cap screwing head mechanism is used to screw a sample tube cap with a spline groove. It is characterized by: a frame with a main control panel, a motor base at one end of the frame, an assembly frame at one end of the motor base, a plurality of rotary motors on the assembly frame, a plug-in post at one end of the rotary motor and with a connecting block, a screwing head plugged into one end of the plug-in post, an insertion part at one end of the screwing head and with a plurality of grooves, and a positioning boss at one end of the insertion part.

[0007] The rotary motor is connected to the main control panel by wires. One end of the screw head is provided with a connecting groove for inserting a plug. A limiting block for abutting the connecting block is provided in the connecting groove. The plug can rotate in the connecting groove. A partition is provided between any two adjacent flower grooves. The end of the partition near the positioning boss is provided with a curved surface.

[0008] Furthermore, a first motor is mechanically connected to one side of the frame, and a connecting plate for connecting a fixing frame is provided at one end of the first motor. A first slider is provided on one side of the fixing frame, and a first slide rail for sliding connection with the first slider is provided on the other side of the frame.

[0009] Furthermore, one side of the motor base is provided with a mounting bracket with a second motor, and one end of the motor base near the mounting bracket is provided with a mounting groove for inserting into the second motor.

[0010] Furthermore, one end of the fixing frame is provided with a second slide rail, and one side of the motor base is provided with a second slider that slides in contact with the second slide rail.

[0011] Furthermore, a cover plate is fixed to one end of the fixing frame, and the cover plate is provided with a slot for the screw head to pass through.

[0012] Furthermore, a connecting rod is provided between the plug-in post and the rotary motor, and the rotary motor is a DC geared motor.

[0013] Furthermore, one end of the plug-in post is provided with a connecting post with a spring, and the connecting rod is provided with a slot for plugging into the connecting post.

[0014] Furthermore, the flower grooves are evenly distributed around the insertion part.

[0015] Furthermore, one end of the frame is equipped with an optical fiber sensor that is connected to the main control panel via electrical wires.

[0016] Furthermore, one end of the positioning boss is provided with a sub-boss, and the sub-boss and the positioning boss are arranged at the same center.

[0017] Compared with the prior art, the present invention has the following advantages: the present invention can accommodate the positional deviation between the sample tube cap and the screw head, realize the smooth insertion of the screw head, reduce the difficulty of user operation, and further ensure the sealing of the sample tube cap by setting a reduction motor. Attached Figure Description

[0018] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0019] Figure 1 This is a perspective view of the present invention.

[0020] Figure 2 This is a cross-sectional view of the present invention.

[0021] Figure 3 This is an exploded view of the present invention.

[0022] Figure 4 This is an assembly structure diagram of the screw head of this utility model.

[0023] Figure 5 This is a schematic diagram of the screw head of this utility model.

[0024] Figure 6 for Figure 5 A schematic diagram of the structure of region C in the middle.

[0025] Figure 7 This is a schematic diagram of the connecting groove of this utility model.

[0026] Figure 8 This is a structural diagram showing the connection between the screw head and the sample tube cap of this utility model.

[0027] In the diagram: A. Sample tube cap; B. Spline groove; 1. Frame; 10. First motor; 2. Main control panel; 11. Connecting plate; 12. First slide rail; 3. Motor base; 30. First slider; 31. Second motor; 32. Fixing frame; 33. Cap removal plate; 34. Second slider; 35. Fixing groove; 36. Slot; 37. Second slide rail; 4. Assembly frame; 5. Rotary motor; 50. Insertion post; 51. Connecting block; 52. Spring; 53. Connecting post; 6. Tightening head; 60. Insertion part; 61. Positioning boss; 62. Sub-boss; 63. Curved surface; 64. Connecting groove; 65. Groove; 66. Spacer; 67. Limiting block; 7. Connecting rod; 70. Slot; 8. Fiber optic sensor. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0029] In the description of this utility model, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. When a component is referred to as being "fixed to" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "set on" another component, it can be directly set on the other component or there may be an intermediate component at the same time. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0030] like Figures 1 to 8As shown, a fixed torque sample tube switch cap screwing mechanism is used to screw a sample tube cap A with a spline groove B. It includes a frame 1 with a main control panel 2, a motor base 3 at one end of the frame 1, an assembly frame 4 at one end of the motor base 3, several rotary motors 5 on the assembly frame 4, a plug-in post 50 at one end of the rotary motor 5 and equipped with a connecting block 51, a screwing head 6 inserted into one end of the plug-in post 50, an insertion part 60 at one end of the screwing head 6 and equipped with several grooves 65, and a positioning boss 61 at one end of the insertion part 60. In this embodiment, the rotary motor 5 is wired to the main control panel 2. One end of the screw head 6 is provided with a connecting groove 64 for inserting the plug post 50. A limiting block 67 for abutting the connecting block 51 is provided in the connecting groove 64. The plug post 50 can rotate in the connecting groove 64. A partition block 66 is provided between any two adjacent slots 65. The end of the partition block 66 near the positioning boss 61 is provided with a curved surface 63. In this embodiment, the rotary motor 5 can rotate in a first direction to loosen and open the sample tube cap A, or rotate in a second direction to tighten and close the sample tube cap A. The screw head 6 is used to insert into the spline groove B of the sample tube cap A. When the insertion part 60 cannot be inserted into the spline groove B, the curved surface 63 abuts against one side of the inner wall of the spline groove B, causing the screw head 6 to rotate through the connecting groove 64, thereby automatically sliding into the spline groove B. After the screw head 6 is inserted into the sample tube cap A, the rotary motor 5 is started. When the connecting block 51 abuts against the limiting block 67, the rotary motor 5 can rotate in the first direction to loosen and open the sample tube cap A, or rotate in the second direction to loosen the screw head 6. Tighten and close the sample tube cap A; the interaction between the connecting groove 64 and the connecting block 51 facilitates the rotation of the screw head 6, thereby automatically adjusting the engagement position of the spline groove B and the screw head 6, so that the screw head 6 and the sample tube cap A are inserted, accommodating the positional deviation between the sample tube cap A and the screw head 6, and achieving smooth insertion of the screw head 6; to further optimize this embodiment, a rotary bearing can also be embedded in the connecting groove 64, which can be sleeved on one end of the insertion post 50, thereby further enhancing the rotational performance of the screw head 6 in the connecting groove 64.

[0031] It should be further explained that a sub-protrusion 62 is provided at one end of the positioning protrusion 61. In this embodiment, the cross-sectional shape of the positioning protrusion 61 is circular, and the side surface of the positioning protrusion 61 is a smooth curved surface. The cross-sectional shape of the sub-protrusion 62 is circular, and the side surface of the sub-protrusion 62 is a smooth curved surface. The cross-sectional area of ​​the sub-protrusion 62 is smaller than the cross-sectional area of ​​the positioning protrusion 61, and the sub-protrusion 62 and the positioning protrusion 61 are set at the same center. By setting the positioning protrusion 61 and the sub-protrusion 62, it is convenient to position the screw head 6 into the spline groove B, further accommodating the positional deviation between the sample tube cap A and the screw head 6, and realizing the smooth insertion of the screw head 6.

[0032] Specifically, the rotary motor 5 is a DC geared motor. By setting the stall current of the DC geared motor, it can be ensured that it outputs a fixed torque in the closing rotation direction. In actual use, the rotary motor 5 rotates continuously when the cover is opened to ensure that the cover is opened smoothly.

[0033] Specifically, a first motor 10 is mechanically connected to one side of the frame 1, and a fixing frame 32 with a second motor 31 is provided on one side of the motor base 3. One end of the second motor 31 is mechanically connected to the motor base 3. One end of the first motor 10 is provided with a connecting plate 11 for connecting the fixing frame 32. A first slider 30 is provided on one side of the fixing frame 32, and a first slide rail 12 for sliding connection with the first slider 30 is provided on the other side of the frame 1. In this embodiment, the first motor 10 is a bidirectional rotating motor, and the first motor 10 is screwed to one side of the frame 1. The rotating shaft is threaded so that the connecting plate 11 is screwed to the first motor 10. When the first motor 10 rotates in the first direction, the connecting plate 11 moves upward through the rotation of the thread. When the first motor 10 rotates in the second direction, the connecting plate 11 moves downward through the rotation of the thread. Then, the connecting plate 11, together with the fixing frame 32, drives the motor base 3 to move upward or downward along the first slide rail 12, thereby adjusting the distance between the screw head 6 and the sample tube cap A. By setting the first motor 10 as a rotary motor, the displacement accuracy of this utility model can be further improved.

[0034] Specifically, one end of the fixing frame 32 is provided with a second slide rail 37, and one side of the motor base 3 is provided with a second slider 34 that slides with the second slide rail 37. The bottom of the fixing frame 32 is screwed with a release plate 33, which has a slot 36 for the screw head 6 to pass through. In this embodiment, the motor base 3 and the fixing frame 32 are slidably connected by the second slide rail 37. The second motor 31 is a rotary motor and has the same structure as the first motor 10. The end of the motor base 3 near the fixing frame 32 is provided with a fixing groove 35 for inserting the second motor 31. The connecting shaft end of the second motor 31 is screwed to one end of the motor base 3 through the fixing groove 35. By starting the second motor 31, the motor base 3... The screw head 6 can move up or down along the second slide rail 37, thereby adjusting the distance between the screw head 6 and the cap removal plate 33. It is worth noting that the width of the slot 36 in this embodiment is smaller than the diameter or width of the sample tube cap A. Therefore, when the motor base 3 moves up along the second slide rail, the screw head 6 drives the sample tube cap A to move up together until one end of the sample tube cap A abuts against one end of the cap removal plate 33. Since the width of the slot 36 is smaller than the diameter or width of the sample tube cap A, the sample tube cap A is subjected to the pressure of the cap removal plate 33 and automatically disengages from the screw head 6. This automatic disengagement function further reduces the operational difficulty of this embodiment, simplifies the manual operation process, and enhances the usage effect.

[0035] To further optimize this embodiment, a connecting rod 7 is provided between the plug-in post 50 and the rotary motor 5. One end of the plug-in post 50 is provided with a connecting post 53 equipped with a spring 52. The connecting rod 7 has a slot 70 for insertion into the connecting post 53. During assembly, one end of the connecting rod 7 is inserted into the rotary motor 5, and the other end of the connecting rod 7 is inserted into the connecting post 53 through the slot 70, so that the end of the connecting rod 7 with the slot 70 abuts against the spring 52. By setting the abutment between the connecting rod 7 and the spring 52, this embodiment can absorb the vibration, impact, or instantaneous overload force generated by the operation of the rotary motor 5 during actual use. When the rotary motor 5 rotates at high speed or the load changes suddenly, the compression and reset of the spring can buffer the rigid impact of the mechanical system, avoid stress concentration caused by the rigid connection between the connecting rod 7 and the plug-in post 50, thereby reducing the risk of component wear or breakage.

[0036] It should be noted that the main control console 2 is wired to the rotary motor 5, the first motor 10, and the second motor 31, respectively, enabling the main control console 2 to control the starting and stopping of the motors. In another embodiment of this utility model, one end of the frame 1 is provided with an optical fiber sensor 8 wired to the main control console 2. In actual use, the optical fiber sensor 8 is flush with the sample tube cap A. The presence of the cap is determined by detecting changes in reflected light through the optical fiber sensor 8. When light shines on the surface of the object, the intensity and path of the reflected light will be different if the sample tube cap A is present compared to when the sample tube cap A is not present. The optical fiber sensor 8 captures and converts the reflected light into an electrical signal, which is then transmitted to the main control console 2. This allows the main control console 2 to automatically control the first motor 10 to adjust the distance between the screw head 6 and the sample tube cap A. Users can further reduce the operational difficulty of this embodiment by selecting to turn on the optical fiber sensor 8.

[0037] Working principle: When opening the lid, the main control console 2 is activated, aligning the screw head 6 with the sample tube cap A, and ensuring that the fiber optic sensor 8 is flush with the sample tube cap A. The fiber optic sensor 8 detects the sample tube cap A, and the main control console 2 automatically controls the first motor 10 to rotate. This causes the connecting plate 11, through the fixing bracket 32, to move the motor base 3 downwards along the first slide rail 12, thereby adjusting the distance between the screw head 6 and the sample tube cap A, allowing the screw head 6 to insert into the spline groove B. When the motor base 3 moves downwards along the first slide rail 12 and the insertion part 60 cannot achieve a proper fit with the spline groove B, the curved surface 63 and the spline groove... The inner wall of the keyway B abuts against the surface, causing the curved surface 63 to slide sideways against the spline groove B. The screw head 6 rotates through the connecting groove 64, thus automatically sliding into the spline groove B. After the screw head 6 is inserted into the sample tube cap A, the rotary motor 5 is started to rotate in the first direction. When the connecting block 51 abuts against the limiting block 67, the rotary motor 5 can drive the screw head 6 to loosen the sample tube cap A. Finally, the second motor 31 is started, causing the screw head 6 to move the sample tube cap A upwards together. The sample tube cap A is subjected to the pressure of the cap release plate 33 and automatically disengages from the screw head 6, completing the opening of the cap.

[0038] When closing the cap, align the screw head 6 with the sample tube cap A, and operate the first motor 10 to rotate. This causes the connecting plate 11 to move the motor base 3 along the first slide rail 12 upwards or downwards via the fixing bracket 32, thereby adjusting the distance between the screw head 6 and the sample tube cap A. Then, the screw head 6 is inserted into the spline groove B. When the insertion part 60 and the spline groove B cannot be inserted, the curved surface 63 abuts against one side of the inner wall of the spline groove B, causing the curved surface 63 to slide sideways against the spline groove B. The screw head 6 rotates through the connecting groove 64, thus automatically sliding into the spline groove B. After the screw head 6 is inserted into the sample tube cap A, start the rotary motor 5 to rotate it in the second direction. When the connecting block 51 abuts against the limiting block 67, the rotary motor 5 can drive the screw head 6 to tighten the sample tube cap A. Finally, start the second motor 31 to move the screw head 6 upwards, and the screw head 6 automatically disengages from the sample tube cap A, completing the cap closing.

[0039] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0040] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A fixed torque sample tube cap screwing mechanism, used for screwing a sample tube cap (A) with a spline groove (B), characterized in that: It includes a frame (1) with a main control panel (2), a motor base (3) at one end of the frame (1), an assembly frame (4) at one end of the motor base (3), several rotary motors (5) on the assembly frame (4), a plug-in post (50) with a connecting block (51) at one end of the rotary motor (5), a screw head (6) plugged into one end of the plug-in post (50), an insertion part (60) with several flower grooves (65) at one end of the screw head (6), and a positioning boss (61) at one end of the insertion part (60). The rotary motor (5) is wired to the main control panel (2). One end of the screw head (6) is provided with a connecting groove (64) for inserting the plug post (50). The connecting groove (64) is provided with a limiting block (67) for abutting the connecting block (51). The plug post (50) can rotate in the connecting groove (64). A partition block (66) is provided between any two adjacent flower grooves (65). The end of the partition block (66) near the positioning boss (61) is provided with a curved surface (63).

2. The fixed torque sample tube switch cap screwing mechanism as described in claim 1, characterized in that: A first motor (10) is mechanically connected to one side of the frame (1). One end of the first motor (10) is provided with a connecting plate (11) for connecting the fixing frame (32). A first slider (30) is provided on one side of the fixing frame (32). A first slide rail (12) is provided on the other side of the frame (1) for sliding connection with the first slider (30).

3. The fixed torque sample tube switch cap screwing mechanism as described in claim 2, characterized in that: The motor base (3) has a mounting bracket (32) with a second motor (31) on one side, and the motor base (3) has a mounting groove (35) for inserting into the second motor (31) at one end near the mounting bracket (32).

4. The fixed torque sample tube switch cap screwing mechanism as described in claim 3, characterized in that: One end of the fixed frame (32) is provided with a second slide rail (37), and one side of the motor base (3) is provided with a second slider (34) that slides in contact with the second slide rail (37).

5. The fixed torque sample tube switch cap screwing mechanism as described in claim 4, characterized in that: One end of the fixing frame (32) is fixed with a cover plate (33), and the cover plate (33) is provided with a slot (36) for the screw head (6) to pass through.

6. The fixed torque sample tube switch cap screwing mechanism as described in claim 5, characterized in that: A connecting rod (7) is provided between the plug-in post (50) and the rotary motor (5), and the rotary motor (5) is a DC geared motor.

7. The fixed torque sample tube switch cap screwing mechanism as described in claim 6, characterized in that: One end of the plug-in post (50) is provided with a connecting post (53) with a spring (52), and the connecting rod (7) is provided with a slot (70) for plugging into the connecting post (53).

8. The fixed torque sample tube switch cap screwing mechanism as described in claim 1, characterized in that: The flower grooves (65) are evenly distributed around the insertion part (60).

9. The fixed torque sample tube switch cap screwing mechanism as described in claim 1, characterized in that: One end of the frame (1) is provided with an optical fiber sensor (8) that is wired to the main control console (2).

10. A fixed torque sample tube switch cap screwing mechanism as described in claim 1, characterized in that: One end of the positioning boss (61) is provided with a sub-boss (62), and the sub-boss (62) and the positioning boss (61) are arranged at the same center.

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