CN201192674Y - Micro-motion control device - Google Patents

Abstract

The utility model discloses a micro stroke control device, which can be applied to the dispensing field. The device comprises a controlling part and a driving part; the driving part comprises a driving and inputting unit, a hydraulic unit and a driving and outputting unit which are connected with each other in sequence, wherein the driving and inputting unit is connected with the controlling part under control, and exerts a first driving stroke on the hydraulic unit according to a control command of the controlling part; and the hydraulic unit converts the first driving stroke into a second driving stoke smaller than the first driving stroke, and exerts the second driving stoke on the driving and outputting unit. The reduced driving stokes are output in a mechanical manner, so that the micro stroke control device realizes the micro displacement control of the driving stokes, the driving strokes are conveniently quantified, and the control operation is simple and convenient. When the micro stroke control device is applied to the dispensing field, the dispensing quantity can be controlled conveniently and precisely, and is not affected by the viscosity of a glue liquid. Therefore, the micro stroke control device has the advantages of high product quality, high production efficiency, glue liquid conservation and reduced cost.

Description

Micro-stroke control device

Technical Field

The utility model relates to a small stroke controlling means can be applied to and glue field or other technical field.

Background

The glue dispensing device on the market at present is generally shown in fig. 1, compressed air enters a rubber cylinder 4 ' through an air pipe 2 ' and a chuck 3 ' by a controller 1 ' provided with an air compressor, the compressed air extrudes a rubber cylinder piston 5 ', and glue liquid 6 ' is extruded from a glue dispensing needle 7 '; the glue yield and the uniformity thereof are controlled by adjusting the air pressure, the extrusion time and the vacuum suction. When the glue dispensing is finished, the air pressure in the glue cylinder 4 ' is instantly reduced by utilizing vacuum, the glue solution 6 ' is balanced inside and outside, and the extrusion effect on the glue solution 6 ' is stopped.

Although the device can achieve the purpose of dispensing, the device has the following defects in the using process:

1. inaccurate glue amount control: due to compressibility of air, when the glue solution has large viscosity, uneven viscosity, slightly long retention time and slightly blocked dispensing needle 7', the dispensing amount is uneven, even normal dispensing is impossible, and accurate control is difficult.

2. Glue leakage or resorption: when the dispensing process is stopped, the internal and external pressures of the glue solution 6' are difficult to adjust to be balanced, and when the pressures are not balanced, the glue solution leaks or is sucked back.

3. The glue is inconvenient to change: an O-shaped sealing ring 8 'is needed to seal between the clamping head 3' and the rubber barrel 4 ', the sealing is tight, and the clamping head 3' is inconvenient to take down, so that the rubber is inconvenient to replace.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a control accurate small stroke controlling means.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the micro-stroke control device comprises a control part and a driving part, wherein the control part is in control connection with the driving part, and the driving part comprises a driving input unit, a hydraulic unit and a driving output unit which are sequentially connected; the drive input unit is controllably connected to the control part and applies a first drive stroke to the hydraulic unit according to a control command of the drive input unit; the hydraulic unit converts the first driving stroke into a second driving stroke smaller than the first driving stroke and applies the second driving stroke to the driving output unit.

The hydraulic unit comprises an oil tank containing hydraulic oil, a closed oil cavity and a control valve mechanism, wherein a connecting channel is arranged between the oil tank and the closed oil cavity; a control valve mechanism is controllably connected to the control part and can selectively open or close the connecting channel; a first piston and a second piston are arranged at two ends of the closed oil cavity, and the sectional area of the second piston is larger than that of the first piston; the stroke of the first piston corresponds to the first drive stroke, and the stroke of the second piston corresponds to the second drive stroke.

The driving input unit comprises a first executing device and a driving connecting mechanism, wherein the first executing device is provided with an output end capable of outputting a third driving stroke, and the third driving stroke is larger than the first driving stroke; the driving connecting mechanism is used for connecting the first actuating device and the first piston.

The driving connecting mechanism comprises a connecting rod and a side link; wherein the stroke of the connecting rod is equivalent to the third driving stroke; the first end of the connecting rod is fixedly connected with the output end of the first execution device, the second end of the connecting rod is hinged with the first end of the side link, and the second end of the side link is hinged with a fixed support; the first piston is hinged to the side link, and the distance from the hinged point to the second end of the side link is shorter than the distance from the hinged point to the first end of the side link.

The first actuator may be a cylinder, a stepping motor or a servo motor, wherein the cylinder may be installed inside or outside the oil tank, and the stepping motor or the servo motor is preferably installed outside the oil tank. If a stepping motor or a servo motor is adopted, the output screw rod is matched with the nut connecting rod to drive the nut connecting rod to move, and numerical control is conveniently realized.

The control valve mechanism comprises a second actuator and a valve core, wherein the second actuator is controllably connected with the control part and can be arranged inside or outside the oil tank; one end of the valve core is connected to the output end of the second execution device, and the other end of the valve core can be selectively matched with a port of the connecting channel, which is positioned on the oil tank side. The second actuator may be a cylinder.

The drive output unit comprises a piston rod fixedly connected to the second piston and an extension rod capable of being adjusted in a telescopic mode relative to the piston rod.

The oil tank and the closed oil chamber may be separated by a partition plate, and the connecting passage may be formed in the partition plate.

Compared with the prior art, the utility model discloses a small stroke control device has following advantage and beneficial effect:

1. the utility model discloses a mechanical system exports again after reducing the drive stroke, can realize the small displacement control of drive stroke, and the drive stroke size is convenient to quantify, and control operation is simple and convenient.

2. The utility model discloses when being applied to the point and gluing the field, can make things convenient for accurate control point volume of gluing to reach the purpose that improves product quality, practices thrift glue solution and reduce cost.

3. When the utility model is applied to the field of glue dispensing, the glue dispensing amount is not influenced by the viscosity of the glue solution; the retention time is slightly long, when the dispensing needle is slightly blocked, the dispensing needle does not need to be replaced, and the dispensing needle can continue to work by directly extruding the slightly solidified glue solution, so that the production efficiency is improved.

4. The utility model discloses when being applied to the point and gluing the field, the drive division need not airtight cooperation with the packing element part, only need adopt simple joint or spiro union cooperation can, the stroke that the first final controlling element was adjusted to the glue solution volume accessible realizes moreover, and therefore the liquid measure is adjusted, is traded glue all very conveniently.

Drawings

FIG. 1 is a schematic structural diagram of a dispensing apparatus of the prior art;

fig. 2 is a schematic structural view of a first embodiment of the micro-stroke control device according to the present invention;

FIG. 3 is an enlarged view of a portion A of FIG. 2;

FIG. 4 is a top view of the drive portion of the embodiment of FIG. 2;

FIG. 5 is a cross-sectional view A-A of the first operating condition of FIG. 4;

FIG. 6 is a cross-sectional view A-A of the second operating condition of FIG. 4;

FIG. 7 is a sectional view A-A of the third operating condition of FIG. 4;

FIG. 8 is a cross-sectional view B-B of the first operating condition of FIG. 4;

fig. 9 is a partial enlarged view B of fig. 5;

FIG. 10 is an enlarged view of portion C of FIG. 6;

FIG. 11 is an enlarged view of portion D of FIG. 7;

FIG. 12 is a schematic view of the engagement between the rubber cylinder and the lower end cap;

FIG. 13 is an enlarged bottom view of FIG. 12;

FIG. 14 is a schematic diagram of the operation of the embodiment of FIG. 2;

FIG. 15 is a schematic illustration of a large piston resetting process of the embodiment of FIG. 2;

fig. 16 is a schematic structural view of a second embodiment of the micro-stroke control device according to the present invention;

FIG. 17 is a schematic diagram of the operation of the embodiment of FIG. 16;

fig. 18 is a schematic structural view of a third embodiment of the minute stroke controlling means of the present invention;

fig. 19 is a schematic diagram of the operation of the embodiment of fig. 18.

Detailed Description

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings.

Referring to fig. 2, it is shown that the small stroke control device of the present invention is applied to the first embodiment of the dispensing control technology field. This embodiment mainly includes a control section 100 and a driving section 200, and the control section 100 includes a controller, an air compressor, and the like.

Referring to fig. 2 to 4, the driving part 200 includes an outer cylinder 1, and the top of the outer cylinder 1 is provided with an upper end cap 2 and the bottom is provided with a lower end cap 3. The upper end cover 2 is respectively provided with a large piston resetting air tap 4, a valve opening air tap 5, a valve closing air tap 6, a pushing connecting rod air tap 7, a returning connecting rod air tap 8, an air pressure balancing hole 9 and a stroke adjusting nut 10. The air compressor in the control portion 100 is connected to the five air nozzles through five air pipes 300, respectively. The lower end cover 3 can be detachably connected with the rubber cylinder 11, and the lower end of the rubber cylinder 11 is provided with a point rubber needle 12. The side wall of the outer cylinder 1 is provided with an oil pointer 13.

Referring to fig. 5 and 9, the inside of the outer cylinder 1 is divided into an upper part and a lower part by a partition 14, wherein the upper part is an oil tank 15 for storing hydraulic oil, and the oil tank 15 is communicated with the outside atmosphere through the air pressure balancing hole 9 shown in fig. 3. The lower part is divided by the inner cylinder 16 into an outer and an inner part, wherein the outer part forms an outer annular chamber 17, and the inner part is divided by the large piston 18 and the large piston rod 19 into a closed oil chamber 20 for containing hydraulic oil and an inner annular chamber 21. The oil tank 15 and the closed oil chamber 20 can be communicated by a connecting passage 36 passing through the partition plate 14. The inner ring cavity 21 and the outer ring cavity 17 are communicated through an inner cylinder hole 37 at the bottom of the inner cylinder 16. Large piston 18 forms a sealing fit with the inner circumferential wall of inner cylinder 16.

Referring to fig. 5 and 8, a small piston control cylinder 22 and a valve control cylinder 23 are provided in the oil tank 15, and the tops of the two cylinders are fixed to the bottom of the upper end cover 2. The stroke adjusting nut 10 is mounted on the piston rod of the small piston control cylinder 22. The upper port of the small piston control cylinder 22 is connected to the pushing connecting rod air nozzle 7 through a pushing connecting rod air pipe 24, and the lower port is connected to the returning connecting rod air nozzle 8 through a returning connecting rod air pipe 25; the upper port of the valve control cylinder 23 is connected to the valve closing air faucet 6 through a valve closing air pipe 26, and the lower port is connected to the valve opening air faucet 5 through a valve opening air pipe 27. In addition, the large piston reset air tap 4 is connected to the outer ring cavity 17 through a large piston reset air tube 28.

Referring to fig. 5 and 9, the lower end of the piston rod of the small piston control cylinder 22 is hinged to a first end 31 of a link 30 through a connecting rod 29 connected with threads, and a second end 32 of the link 30 is hinged to a support 33 fixed on the partition 14. A small elongated cylindrical piston 34 is hinged at its upper end to side link 30 and the hinge point 35 is located at a much shorter distance from the second end 32 of the side link than the first end 31 of the side link. The lower portion of the small piston 34 is in sealing engagement with a vertical oil gallery 48 in the diaphragm 14, the small piston 34 having a cross-sectional area substantially smaller than the cross-sectional area of the large piston 18.

Referring to fig. 5 and 10, the lower end of the piston rod of the valve control cylinder 23 is fixedly connected to a valve core 49, and the lower end of the valve core 49 forms a conical surface which can be tightly fitted with the upper port of the connecting channel 36 to block the connecting channel 36.

Referring to fig. 12 and 13, the lower end cap 3 is formed with a support portion 38 on each side of the bottom, a boss 43 is formed above each support portion 38, a gap 39 is formed between the support portion 38 and the boss 43 on one side and the support portion 38 and the boss 43 on the other side, a caulking groove 40 is formed between the support portion 38 and the boss 43, and a rubber barrel stop pin 41 is arranged between the boss 43 on each side and the support portion 38 on the same side.

The operation of the micro-stroke control device will be described below with reference to fig. 2 to 15:

firstly, a rubber cylinder mounting process, namely mounting a rubber cylinder 11 containing rubber liquid, a rubber cylinder piston 47 and a point rubber needle 12 on a lower end cover 3 of a micro-stroke control device, as shown in fig. 13, aligning the center of the rubber cylinder 11 with the center of the lower end cover 3, aligning two wing parts 44 at the top end of the rubber cylinder 11 with a gap 39 between two supporting parts 38, then sending the rubber cylinder 11 upwards, and enabling the top surface of the rubber cylinder 11 to contact the bottom surface of a boss 43, wherein at the moment, the two wing parts 44 are positioned at a position shown by a dotted line 44' in the figure; then, the glue cylinder 11 is rotated clockwise to make the two wings 44 enter the caulking grooves 40 between the supporting portions 38 and the bosses 43 until the two wings 44 respectively touch the glue cylinder stop pins 41, and at this time, the two wings 44 are located at the position indicated by the broken line 44 ". As shown in FIG. 12, after the rubber cartridge 11 is mounted in place, the screw 45 is loosened, the extension rod 46 is adjusted by moving it down along the large piston rod 19 to contact the rubber cartridge piston 47, and finally the screw 45 is locked, and the rubber cartridge mounting is completed.

And (3) starting a dispensing process: firstly, according to the preset glue dispensing amount, the stroke of the small piston control cylinder 22 is preset through the stroke adjusting nut 10. The control part 100 cuts off the compressed air returning to the connecting rod air nozzle 8, supplies the compressed air to the pushing connecting rod air nozzle 7 through the air pipe 300, the compressed air enters the small piston control cylinder 22 through the pushing connecting rod air pipe 24 to push the piston rod of the small piston control cylinder, the piston rod drives the side link 30 to rotate counterclockwise in a small amount around the support 33 through the connecting rod 29, and the side link 30 drives the small piston 34 to move downward through the hinge point 35 while rotating. Hydraulic oil in the oil passage 48 is compressed by the small piston 34 and enters the closed chamber 20 through the inclined hole 49. And then the hydraulic oil in the closed cavity 20 pushes the large piston 18, the large piston 18 pushes the large piston rod 19 again, the large piston rod 19 generates displacement, the displacement is transmitted to the extension rod 46 through the locking screw 45, the extension rod 46 directly pushes the rubber cylinder piston 47, the rubber cylinder piston 47 extrudes the rubber solution 50, and the rubber solution 50 drips out of the dispensing needle 12, so that a dispensing process is completed.

And (3) a valve opening process: referring to fig. 2, 7 and 14, the control portion 100 breaks the compressed air of the valve closing air tap 6, supplies the compressed air to the valve opening air tap 5 through the air pipe 300, the compressed air enters the valve control cylinder 23 through the valve opening air pipe 27, the piston rod of the valve control cylinder 23 is reset and lifts the valve core 49, the valve core 49 is disengaged from the upper port of the connecting passage 36, and thus the connecting passage 36 is opened, and the sealed chamber 20 is communicated with the oil tank 15.

The small piston resetting process: referring to fig. 2, 5, 8 and 14, the control part 100 cuts off the compressed air pushing the link air cock 7, supplies the compressed air to the retracting link air cock 8 through the air pipe 300, and the compressed air enters the small piston control cylinder 22 through the retracting link air pipe 25 to restore the piston rod thereof. The piston rod drives the side link 30 to rotate clockwise slightly around the support 33 through the connecting rod 29, and the side link 30 drives the small piston 34 to move upwards and reset through the hinge point 35 while rotating. Since the connection channel 36 has been opened, the increased volume of the closed chamber 20 is taken from the hydraulic oil of the oil tank 15 into the closed chamber 20 via the connection channel 36.

And (3) valve closing process: referring to fig. 2, 6 and 14, the control part 100 disconnects the compressed air from the valve opening nozzle 5, supplies the compressed air to the valve closing nozzle 6 through the air pipe 300, the compressed air enters the valve control cylinder 23 through the valve closing air pipe 26, the piston rod of the valve control cylinder 23 is pushed out to push the valve core 49 at the head of the piston rod to move downwards, the outer conical surface at the bottom end of the valve core is tightly combined with the inner conical surface at the upper port of the connecting channel 36 to form a seal, so that the connecting channel 36 is closed, and the sealed cavity 20 is isolated from the oil tank 15. And then starting a new round of dispensing process, and repeating the steps.

The large piston resetting process: after the repeated dispensing operations, the glue solution 50 in the glue cartridge 11 is consumed. Referring to fig. 2, 5 and 15, at this time, the control portion 100 disconnects the compressed air of the valve closing air tap 6, supplies the compressed air to the valve opening air tap 5 through the air pipe 300, the compressed air enters the valve control cylinder 23 through the valve opening air pipe 27, the piston rod of the valve control cylinder 23 lifts the valve core 49, and the connecting passage 36 is opened; then, the control part 100 supplies compressed air to the large piston resetting air tap 4 through the air pipe 300, the compressed air enters the outer ring cavity 17 through the large piston resetting air pipe 28 and enters the inner ring cavity 21 through the inner cylinder hole 37, the compressed air pushes the large piston 18 to move upwards for resetting, and the hydraulic oil in the sealed cavity 20 returns to the oil tank 15 through the connecting channel 36. At this time, the used cartridge 11 may be removed, a new cartridge may be replaced, and a new dispensing operation may be continued.

Referring to fig. 16 and 17, a second embodiment of the micro-stroke control device of the present invention applied to the dispensing control technology field is shown. The main difference between this embodiment and the first embodiment is that the small piston 34 is controlled by a stepping or servo motor 51 instead of the small piston control cylinder 22, so as to conveniently realize the function of digital glue amount adjustment. A stepping or servo motor 51 is fixed to the top of the upper end cap 2 of the outer cylinder 1 by a motor bracket 52. Because the small piston control cylinder 22 is replaced by the stepping or servo motor 51, the top of the upper end cover 2 only needs to be provided with a large piston resetting air nozzle 4, a valve opening air nozzle 5 and a valve closing air nozzle 6. The control part 400 includes a controller and an air compressor, the air compressor is connected to the three air nozzles through three air pipes 600, respectively, and the controller controls the rotation speed, the rotation direction and the number of rotations of the stepping or servo motor 51 through the control cable 500 in addition to the air compressor. The output screw 53 of the stepper or servo motor 51 is in threaded engagement with a top nut of a nut link 54 passing through the upper end cap 2. The output screw 53 rotates to drive the nut link 54 to move vertically. The nut connecting rod 54 moves vertically and drives the connecting rod 30 in the oil tank 15 to rotate slightly, so as to drive the small piston 34 to move downwards and upwards. The structure, operation principle and process of other parts are basically the same as those of the first embodiment, and are not described herein again.

Referring to fig. 18 and 19, a third embodiment of the micro-stroke control device of the present invention applied to the dispensing control technology field is shown. The main difference between this embodiment and the first embodiment is that the small piston control cylinder 22 and the valve control cylinder 23 are moved outside the oil tank 15 and fixed to the top of the upper head cover 2, thereby eliminating the trouble of centralized piping. At this time, four of the air pipes 300 can be directly connected to the small piston control cylinder 22 and the valve control cylinder 23, so that only one large piston return air nozzle 4 needs to be arranged at the top of the upper end cap 2. Since the small piston control cylinder 22 and the valve control cylinder 23 are moved out of the oil tank 15, the height of the oil tank 15 can be reduced accordingly. Otherwise, the structure and operation of this embodiment are substantially the same as those of the first embodiment, and are not described herein again.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the inventive concept of the present invention, and these modifications and improvements are all within the protection scope of the present invention.

Claims (10)

1. A micro-stroke control device comprises a control part and a driving part, wherein the control part is in control connection with the driving part, and the micro-stroke control device is characterized in that:

the driving part comprises a driving input unit, a hydraulic unit and a driving output unit which are connected in sequence; wherein,

the drive input unit is controllably connected to the control part and applies a first drive stroke to the hydraulic unit according to a control command of the drive input unit;

the hydraulic unit converts the first driving stroke into a second driving stroke smaller than the first driving stroke and applies the second driving stroke to the driving output unit.

2. The minute stroke control device according to claim 1, wherein:

the hydraulic unit comprises

The hydraulic oil tank comprises an oil tank containing hydraulic oil and a closed oil cavity, wherein a connecting channel is arranged between the oil tank and the closed oil cavity;

a control valve mechanism selectively opening or closing the connection passage, controllably connected to the control portion;

the first piston and the second piston are positioned at two ends of the closed oil cavity, and the sectional area of the second piston is larger than that of the first piston;

the stroke of the first piston corresponds to the first drive stroke, and the stroke of the second piston corresponds to the second drive stroke.

3. The minute stroke control device according to claim 2, characterized in that:

the drive input unit comprises

The first executing device is provided with an output end capable of outputting a third driving stroke, and the third driving stroke is larger than the first driving stroke;

and the driving connecting mechanism is connected with the first actuating device and the first piston.

4. The minute stroke control device according to claim 3, wherein:

the driving connecting mechanism comprises a connecting rod and a side link; wherein,

the stroke of the connecting rod is equivalent to the third driving stroke;

the first end of the connecting rod is fixedly connected with the output end of the first execution device, the second end of the connecting rod is hinged with the first end of the side link, and the second end of the side link is hinged with a fixed support;

the first piston is hinged to the side link, and the distance from the hinged point to the second end of the side link is shorter than the distance from the hinged point to the first end of the side link.

5. The minute stroke control device according to claim 4, wherein:

the first executing device is an air cylinder, a stepping motor or a servo motor.

6. The minute stroke control device according to claim 5, wherein:

the cylinder is arranged inside or outside the oil tank;

the stepping motor or the servo motor is installed outside the oil tank.

7. The minute stroke control device according to claim 2, characterized in that:

the control valve mechanism comprises

The second execution device is arranged inside or outside the oil tank and is connected with the control part in a controlled manner;

and one end of the valve core is connected to the output end of the second execution device, and the other end of the valve core is selectively matched with the port of the connecting channel on the oil tank side.

8. The minute stroke control device according to claim 7, wherein:

the second actuator is a cylinder.

9. The minute stroke control device according to claim 2, characterized in that:

the drive output unit comprises a piston rod fixedly connected to the second piston and an extension rod capable of being adjusted in a telescopic mode relative to the piston rod.

10. The minute stroke control device according to claim 2, characterized in that:

the oil tank and the closed oil cavity are separated by a partition plate, and the connecting channel is formed on the partition plate.

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