Clamping mechanism

Abstract

The present invention discloses a clamping mechanism, comprising: a base plate, a slide rail fixed on the base plate, a first slider and a second slider slidably arranged on the slide rail in a horizontal direction, a first mounting plate fixed on the first slider, a pressure head assembly slidably arranged on the first mounting plate in a vertical direction, a second mounting plate fixed on the second slider, a push rod assembly connected to the second mounting plate, a driving assembly for driving the second slider, the push rod assembly and the first slider to move in a horizontal direction, and a conversion block connected between the push rod assembly and the first mounting plate for converting the horizontal movement of the push rod assembly into the vertical movement of the pressure head assembly. The present invention converts the horizontal movement of the push rod assembly into the vertical movement of the pressure head assembly through the conversion block to extrude the sample. Before and after the compression, there is no obstruction above the compressed object, which is convenient to operate and has a wide field of view.

Description

Technical Field

[0001] The invention relates to the field of pressing equipment, and in particular to a pressing mechanism. Background Art

[0002] The clamping mechanism is used in many scenarios or equipment, and is mainly used to clamp samples. For example, a clamping mechanism is generally provided in a droplet generator, and its main function is to press the pressure head that provides the gas source onto the microporous chip used to generate droplets, and to supply positive or negative pressure gas to the microporous chip to generate droplets. The existing clamping mechanism has many defects, such as: the movement stroke of the clamping process is short, which is not convenient for precise control and adjustment; the consistency of the plane clamping process is not high; the front clamping cannot be achieved by applying force from the side, the field of view directly above the clamped object is poor, or it is inconvenient to take and put, etc. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a clamping mechanism to address the deficiencies in the above-mentioned prior art.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a clamping mechanism, including: a base plate, a slide rail fixed to the base plate, a first slider and a second slider slidably arranged on the slide rail in a horizontal direction, a first mounting plate fixed to the first slider, a pressure head assembly slidably arranged on the first mounting plate in a vertical direction, a second mounting plate fixed to the second slider, a push rod assembly connected to the second mounting plate, a driving assembly for driving the second slider, the push rod assembly and the first slider to move in a horizontal direction, and a conversion block connected between the push rod assembly and the first mounting plate for converting the horizontal movement of the push rod assembly into the vertical movement of the pressure head assembly.

[0005] Preferably, the push rod assembly comprises a first connecting rod, a connecting rod sleeve and a second connecting rod, wherein the first end of the first connecting rod is connected to the second mounting plate, the second end of the first connecting rod is connected to the first end of the connecting rod sleeve, and the second end of the connecting rod sleeve is connected to the first end of the second connecting rod;

[0006] The first end of the connecting rod sleeve is axially provided with a connecting rod hole for slidably inserting the first connecting rod, a first spring is arranged in the connecting rod hole, and a limiting groove penetrating the connecting rod sleeve and communicating with the connecting rod hole is arranged on the side of the first end of the connecting rod sleeve.

[0007] Preferably, a pin hole is formed at the second end of the first connecting rod, a limiting pin is inserted into the pin hole, and both ends of the limiting pin can be slidably disposed in the limiting groove.

[0008] Preferably, the adapter block is L-shaped, including a vertical portion and a horizontal portion, the upper end of the vertical portion is rotatably connected to the second end of the second connecting rod, and the connection between the vertical portion and the horizontal portion is rotatably connected to the first mounting plate via a rotating shaft; a spherical top pressing portion is provided on the bottom surface of the vertical portion.

[0009] Preferably, the pressure head assembly includes a guide column fixedly connected to the base of the first mounting plate, a limit top plate fixedly connected to the top of the first mounting plate and located above the guide column, a first pressure head sleeved on the guide column and slidable along the guide column between the base of the first mounting plate and the limit top plate, a second spring sleeved on the guide column and located between the bottom surface of the first pressure head and the base of the first mounting plate, a pressure plate fixedly connected to the pressure cylinder, and a second pressure head connected to the other end of the pressure plate;

[0010] The first pressure head is provided with a guide hole which penetrates in a vertical direction and is used for inserting the guide column.

[0011] Preferably, a mounting groove is provided in the middle of the position-limiting top plate, a blocking rod is provided in the mounting groove, and the horizontal portion of the adapter block is provided between the blocking rod and the upper surface of the first pressing head.

[0012] Preferably, a bracket is provided on the bottom plate, an upper mounting plate is provided on the upper part of the bracket, a first optical coupler and a second optical coupler are provided on the bottom surface of the upper mounting plate, and an optical coupler baffle for cooperating with the first optical coupler and the second optical coupler is provided on the second mounting plate.

[0013] Preferably, a limiting block for limiting the first sliding block after it moves to an end position is further provided on the bottom plate.

[0014] Preferably, after the driving assembly drives the first slider to move to the end position, the first slider stops moving, and the pressing head assembly reaches above the sample to be pressed; the driving assembly drives the second slider and the push rod assembly to continue moving, and drives the pressing head assembly to vertically press the sample to be pressed downward through the adapter block.

[0015] Preferably, the driving assembly includes a motor fixedly connected to the second mounting plate and a screw rod drivingly connected to the output shaft of the motor, and a threaded hole matching the thread of the screw rod is provided on the second mounting plate; the screw rod passes through the threaded hole, and its two ends are rotatably connected to the bracket.

[0016] The beneficial effects of the present invention are as follows: the clamping mechanism of the present invention converts the horizontal movement of the push rod assembly into the vertical movement of the pressure head assembly through the adapter block to squeeze the sample, and there is no obstruction above the compressed object before and after the compression, which is convenient to operate and has a wide field of vision;

[0017] The present invention transmits force and motion between the first connecting rod and the connecting rod sleeve by setting a first spring, and the clamping displacement is amplified by a small spring, so that the clamping force can be accurately adjusted to achieve clamping;

[0018] The adapter block of the present invention contacts the upper surface of the first pressure head through the spherical top pressure part. During the downward pressing process of the adapter block, it is always in point-surface contact with the first pressure head. The point driving surface is used in conjunction with the guide column to ensure that the first pressure head is pressed vertically downward and the pressing force is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the clamping mechanism of the present invention;

[0020] Figure 2 It is a cross-sectional structural schematic diagram of the clamping mechanism of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the adapter block and the pressure head assembly of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the pressure head assembly of the present invention;

[0023] Figure 5 It is a schematic structural diagram of the adapter block of the present invention.

[0024] Description of reference numerals:

[0025] 1—bottom plate; 10—slide rail; 11—first slider; 12—second slider; 13—first mounting plate; 14—second mounting plate; 15—bracket; 16—upper mounting plate; 17—first optical coupler; 18—second optical coupler; 19—limiting block; 140—optical coupler baffle;

[0026] 2—pressing head assembly; 20—guide column; 21—limiting top plate; 22—first pressing head; 23—second spring; 24—pressing plate; 25—second pressing head; 26—guide hole; 27—mounting slot; 28—blocking rod;

[0027] 3—push rod assembly; 30—first connecting rod; 31—connecting rod sleeve; 32—second connecting rod; 33—connecting rod hole; 34—first spring; 35—limiting groove; 36—pin hole; 37—limiting pin;

[0028] 4—driving assembly; 40—motor; 41—screw rod; 42—threaded hole;

[0029] 5—adapter block; 50—vertical portion; 51—horizontal portion; 52—spherical top pressing portion. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0031] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0032] like Figure 1 As shown, a clamping mechanism of this embodiment includes: a base plate 1, a slide rail 10 fixedly connected to the base plate 1, a first slider 11 and a second slider 12 slidably arranged on the slide rail 10 in a horizontal direction, a first mounting plate 13 fixedly connected to the first slider 11, a pressure head assembly 2 slidably arranged on the first mounting plate 13 in a vertical direction, a second mounting plate 14 fixedly connected to the second slider 12, a push rod assembly 3 connected to the second mounting plate 14, a driving assembly 4 for driving the second slider 12, the push rod assembly 3 and the first slider 11 to move in a horizontal direction, and an adapter block 5 connected between the push rod assembly 3 and the first mounting plate 13 for converting the horizontal movement of the push rod assembly 3 into the vertical movement of the pressure head assembly 2.

[0033] A limiting block 19 is also provided on the bottom plate 1 for limiting the first sliding block 11 after it moves to the end position.

[0034] Among them, after the driving component 4 drives the first slider 11 to move to the end position, the first slider 11 is blocked by the limit block 19 and stops moving. At this time, the pressing head assembly 2 just reaches the top of the sample to be pressed; the driving component 4 drives the second slider 12 to drive the push rod assembly 3 to continue moving, and converts the horizontal movement of the push rod assembly 3 into the vertical movement of the pressing head assembly 2 through the adapter block 5, thereby driving the pressing head assembly 2 to squeeze the sample to be pressed downward to achieve compression.

[0035] In one embodiment, referring to Figure 1-5 The push rod assembly 3 includes a first connecting rod 30, a connecting rod sleeve 31 and a second connecting rod 32. The first end of the first connecting rod 30 is connected to the second mounting plate 14, the second end of the first connecting rod 30 is connected to the first end of the connecting rod sleeve 31, and the second end of the connecting rod sleeve 31 is connected to the first end of the second connecting rod 32. The first end of the connecting rod sleeve 31 is provided with a connecting rod hole 33 in the axial direction for slidably inserting the first connecting rod 30, and a first spring 34 is arranged in the connecting rod hole 33. The side of the first end of the connecting rod sleeve 31 is provided with a limiting groove 35 that penetrates the connecting rod sleeve 31 and communicates with the connecting rod hole 33. The second end of the first connecting rod 30 is provided with a pin hole 36, and a limiting pin 37 is inserted in the pin hole 36. Both ends of the limiting pin 37 are slidably arranged in the limiting groove 35.

[0036] Among them, under the action of the driving assembly 4, the first connecting rod 30 moves to the left, but after the pressure head assembly 2 is above the sample to be pressed, the first connecting rod 30 continues to move to the left to squeeze the first spring 34, and the first spring 34 continues to drive the pressure head assembly 2 to move downward to squeeze the sample. The purpose of the first spring 34 is to amplify the clamping process. Since the pressure head is a solid, the sample to be clamped is generally also a solid, and the deformation distance of the clamping process is very small. The function of the first spring 34 is to slowly apply the thrust of the push rod assembly 3 to the compressed object through the spring deformation force, amplify the distance of the entire clamping process, and realize precise control of the clamping process. The limit pin 37 can only move within the length range of the limit slot 35, thereby also limiting the range of motion of the first connecting rod 30, that is, when the first connecting rod 30 moves to the limit pin 37 reaches the leftmost end of the limit slot 35, the pressure head assembly 2 reaches the lowermost end, so that the limit position of the downward movement of the pressure head assembly 2 can be limited to prevent excessive compression of the sample and damage to the sample. On the other hand, when the first connecting rod 30 returns to the right, the limiting pin 37 enables the first connecting rod 30 to drive the connecting rod sleeve 31 and the second connecting rod 32 to return to the right.

[0037] Furthermore, the adapter block 5 is L-shaped, including a vertical portion 50 and a horizontal portion 51. The upper end of the vertical portion 50 is rotatably connected to the second end of the second connecting rod 32, and the connection between the vertical portion 50 and the horizontal portion 51 is rotatably connected to the first mounting plate 13 through a rotating shaft; when the second connecting rod 32 moves to the left, it drives the vertical portion 50 and the horizontal portion 51 to rotate counterclockwise together, and the horizontal portion 51 presses the pressure head assembly 2 downward. A spherical pressing portion 52 is provided on the bottom surface of the vertical portion 50, and the adapter block 5 is in point-surface contact with the pressure head assembly 2 through the spherical pressing portion 52 to transmit pressure.

[0038] Further, the pressure head assembly 2 includes a guide column 20 fixedly connected to the base of the first mounting plate 13, a limit top plate 21 fixedly connected to the top of the first mounting plate 13 and located above the guide column 20, a first pressure head 22 sleeved on the guide column 20 and slidable along the guide column 20 between the base of the first mounting plate 13 and the limit top plate 21, a second spring 23 sleeved on the guide column 20 and located between the bottom surface of the first pressure head 22 and the base of the first mounting plate 13, a pressure plate 24 fixedly connected to the pressure cylinder, and a second pressure head 25 connected to the other end of the pressure plate 24;

[0039] The first pressing head 22 is provided with a guide hole 26 which is vertically penetrated and into which the guide column 20 is inserted. In this embodiment, two guide columns 20 and two guide holes 26 are included.

[0040] The adapter block 5 contacts the upper surface of the first pressure head 22 through the spherical top pressing portion 52. During the downward pressing process, the adapter block 5 is always in point-surface contact with the first pressure head 22. Cooperating with the guide column 20, it can ensure that the first pressure head 22 is pressed vertically downward at a high height to ensure a stable pressing force.

[0041] The material of the second pressure head 25 can be metal or plastic, which can be selected according to the actual application needs. The second pressure head 25 can have a channel structure inside to realize the pipeline passage function of gas or liquid, and can be used in series with other gas source devices to realize gas pressure supply. For example, in this embodiment, the clamping mechanism is specifically applied to a droplet generator, and the main function of the clamping mechanism is to

[0042] The second pressing head 25 is pressed tightly against the microporous chip below for generating microdroplets, and supplies positive or negative pressure gas to the microporous chip to generate microdroplets. Of course, the pressing mechanism can also be applied to other scenarios. The lower surface of the second pressing head 25 can have a texture, and the texture can be copied and transferred during the pressing process; a heating belt or other heat source device can be added inside the second pressing head 25 to provide temperature control during the pressing process. These functions can be selectively added according to specific needs.

[0043] Furthermore, a mounting groove 27 is provided in the middle of the limiting top plate 21, a stopper 28 is provided in the mounting groove 27, and a horizontal portion 51 of the adapter block 5 is provided between the stopper 28 and the upper surface of the first pressing head 22. When the second connecting rod 32 is reset to the right, the adapter block 5 is driven to rotate clockwise, and the horizontal portion 51 is caught by the stopper 28, thereby driving the adapter block 5, the pressing head assembly 2 and the first sliding block 11 to move rightward and reset together.

[0044] An upper mounting plate 16 is disposed on the upper portion of the bracket 15, a first optical coupler 17 and a second optical coupler 18 are disposed on the bottom surface of the upper mounting plate 16, and an optical coupler baffle 140 for cooperating with the first optical coupler 17 and the second optical coupler 18 is disposed on the second mounting plate 14. The first optical coupler 17 and the second optical coupler 18 are used to realize the positioning of the first position and the second position. The first optical coupler 17 and the second optical coupler 18 are both conventional slot-type optical couplers.

[0045] In a preferred embodiment, the driving assembly 4 includes a motor 40 fixedly connected to the second mounting plate 14 and a screw rod 41 drivingly connected to the output shaft of the motor 40. The second mounting plate 14 is provided with a threaded hole 42 threadedly matched with the screw rod 41; the screw rod 41 passes through the threaded hole 42, and its two ends are rotatably connected to the bracket 15. Of course, the driving assembly 4 can also select other conventional linear motion devices, as long as it can realize the driving function of the first slider 11 and the second slider 12.

[0046] A working process of the clamping mechanism of this embodiment is as follows:

[0047] Reference Figure 1 and 2, the motor 40 works, the screw rod 41 rotates, thereby driving the second mounting plate 14 and the second slider 12 fixed thereto to move to the left, and the force is transmitted through the push rod assembly 3 and the adapter block 5, driving the first slider 11, the first mounting plate 13 fixed thereto and the pressure head assembly 2 to slide to the left. When the optical coupling baffle 140 reaches the first optical coupling 17 and blocks it, the second pressure head 25 of the pressure head assembly 2 also arrives just above the sample to be pressed, and the first slider 11 reaches the leftmost end and contacts the limit block 19, and cannot move to the left any further; the first connecting rod 30 of the push rod assembly 3 continues to move to the left and squeezes the first spring 34, and continues to drive the connecting rod sleeve 31 and the second connecting rod 32 through the first spring 34. Move to the left, and drive the second ram 25 of the ram assembly 2 to move downward to squeeze the sample through the adapter block 5. When the optical coupling baffle 140 reaches the second optical coupling 18 and blocks it, the second ram 25 of the ram assembly 2 moves to the bottom to achieve compression. At this time, the limit pin 37 at the left end of the first connecting rod 30 also moves to the leftmost end of the limit slot 35, and the second ram 25 cannot move downward. When resetting, the motor 40 reverses, driving the second slider 12, the push rod assembly 3, the adapter block 5, the first slider 11, the ram assembly 2, etc. to reset to the right. Under the elastic force of the second spring 23, the second ram 25 moves upward to quickly reset, and the second ram 25 takes off the sample and returns to the initial position to the right. By adopting the double slider method, it can be ensured that the field of view directly above the compressed object is clear before and after compression (the ram assembly 2 is on the upper side of the sample and will not block the sample), ensuring convenient access, especially for compressed objects with access requirements, which can provide convenience.

[0048] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to specific details.

Claims

1. A clamping mechanism, characterized in that: include: A bottom plate, a slide rail fixed to the bottom plate, a first slider and a second slider slidably arranged on the slide rail in a horizontal direction, a first mounting plate fixed to the first slider, a press head assembly slidably arranged on the first mounting plate in a vertical direction, a second mounting plate fixed to the second slider, a push rod assembly connected to the second mounting plate, a driving assembly for driving the second slider, the push rod assembly and the first slider to move in a horizontal direction, and a conversion block connected between the push rod assembly and the first mounting plate for converting the horizontal movement of the push rod assembly into the vertical movement of the press head assembly; The bottom plate is also provided with a limit block for limiting the first sliding block after it moves to the end position; After the driving assembly drives the first slider to move to the end position, the first slider stops moving, and the pressing head assembly reaches above the sample to be pressed; the driving assembly drives the second slider and the push rod assembly to continue moving, and drives the pressing head assembly to vertically press the sample to be pressed downward through the adapter block; The driving assembly includes a motor fixedly connected to the second mounting plate and a screw rod drivingly connected to the output shaft of the motor.

2. The clamping mechanism according to claim 1, characterized in that: The push rod assembly includes a first connecting rod, a connecting rod sleeve and a second connecting rod, wherein the first end of the first connecting rod is connected to the second mounting plate, the second end of the first connecting rod is connected to the first end of the connecting rod sleeve, and the second end of the connecting rod sleeve is connected to the first end of the second connecting rod; The first end of the connecting rod sleeve is axially provided with a connecting rod hole for slidably inserting the first connecting rod, a first spring is arranged in the connecting rod hole, and a limiting groove penetrating the connecting rod sleeve and communicating with the connecting rod hole is arranged on the side of the first end of the connecting rod sleeve.

3. The clamping mechanism according to claim 2, characterized in that: A pin hole is formed at the second end of the first connecting rod, a limiting pin is inserted into the pin hole, and two ends of the limiting pin can be slidably disposed in the limiting groove.

4. The clamping mechanism according to claim 3, characterized in that: The adapter block is L-shaped and includes a vertical portion and a horizontal portion. The upper end of the vertical portion is rotatably connected to the second end of the second connecting rod, and the connection between the vertical portion and the horizontal portion is rotatably connected to the first mounting plate via a rotating shaft; a spherical top pressing portion is provided on the bottom surface of the vertical portion.

5. The clamping mechanism according to claim 4, characterized in that: The pressure head assembly includes a guide column fixedly connected to the base of the first mounting plate, a limit top plate fixedly connected to the top of the first mounting plate and located above the guide column, a first pressure head sleeved on the guide column and slidable along the guide column between the base of the first mounting plate and the limit top plate, a second spring sleeved on the guide column and located between the bottom surface of the first pressure head and the base of the first mounting plate, a pressure plate fixedly connected to the pressure cylinder, and a second pressure head connected to the other end of the pressure plate; The first pressure head is provided with a guide hole which penetrates in a vertical direction and is used for inserting the guide column.

6. The clamping mechanism according to claim 5, characterized in that: A mounting groove is provided in the middle of the position-limiting top plate, a blocking rod is provided in the mounting groove, and the horizontal portion of the adapter block is provided between the blocking rod and the upper surface of the first pressing head.

7. The clamping mechanism according to claim 1, characterized in that: A bracket is arranged on the bottom plate, an upper mounting plate is arranged on the upper part of the bracket, a first optical coupler and a second optical coupler are arranged on the bottom surface of the upper mounting plate, and an optical coupler baffle for cooperating with the first optical coupler and the second optical coupler is arranged on the second mounting plate.

8. The clamping mechanism according to claim 1, characterized in that: The second mounting plate is provided with a threaded hole that matches the thread of the screw rod; the screw rod passes through the threaded hole, and both ends of the screw rod are rotatably connected to the bracket.

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