CN115789013A - Timely start-stop constant-speed controllable cylinder and control method - Google Patents
Timely start-stop constant-speed controllable cylinder and control method Download PDFInfo
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- CN115789013A CN115789013A CN202310085861.3A CN202310085861A CN115789013A CN 115789013 A CN115789013 A CN 115789013A CN 202310085861 A CN202310085861 A CN 202310085861A CN 115789013 A CN115789013 A CN 115789013A
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Abstract
The invention provides a cylinder with timely start-stop and constant speed control and a control method, belongs to the technical field of cylinders, and is used for solving the problems that in the prior art, when the load of the cylinder changes, the air pressure is small or the air pressure is unstable, the running speed is unstable, the cylinder is stuck and the like, and the start-stop precision is low at any position; the method comprises the following steps: the first gas-liquid cylinder comprises a first cylinder barrel, a first front cover, a first rear cover and a first piston, and the first cylinder barrel is divided into a first oil chamber and a first air chamber by the first piston; the second gas-liquid cylinder includes second cylinder, second protecgulum, second back lid and second piston, the second piston slides and sets up inside the second cylinder, the second piston will second grease chamber and second air chamber are separated into to the second cylinder, the second grease chamber with first grease chamber communicates each other, opens and stops the valve setting and between first grease chamber and second grease chamber.
Description
Technical Field
The invention belongs to the technical field of cylinders, and particularly relates to a cylinder capable of being started and stopped in time and controlled at a constant speed and a control method.
Background
At present, the standard type cylinder can be realized by installing a speed regulation joint for realizing the control of the linear motion speed of a piston rod of the cylinder. The mode of installing the speed regulation joint has the advantages of simple structure and more flexible installation. If the stop of any position of the cylinder is to be controlled, the stop is realized by adding a magnetic ring on a piston of the cylinder, connecting a magnetic induction data line outside, and controlling the power supply of the electromagnetic valve through magnetic induction to control the air flow to change direction and maintain pressure. Although the linear motion speed of the piston rod can be adjusted by installing the speed adjusting joint, the operating speed is unstable and is blocked when the load is changed, the air pressure is small or the air pressure is unstable, and the use performance of the air cylinder is seriously influenced; the power supply of the magnetic induction control electromagnetic valve is used for controlling the air flow to change and maintain pressure, so that the air cylinder can be stopped at any position, but the precision is very low, the performance requirement of automatic equipment is difficult to guarantee, the application is greatly limited, and the requirements on switching and pushing actions which are not high can only be met.
Disclosure of Invention
In view of the above disadvantages of the prior art, an object of the present invention is to provide a cylinder with controllable on-off and constant speed in time and a control method, which are used to solve the problems that the operation speed of the cylinder in the prior art is unstable and stuck when the load changes, the air pressure is small or the air pressure is unstable, and the accuracy of on-off at any position is low.
In order to achieve the above and other related objects, the present invention provides a cylinder with controllable constant speed and starting and stopping in time, comprising: the first gas-liquid cylinder comprises a first cylinder barrel, a first front cover, a first rear cover and a first piston, wherein the first front cover and the first rear cover are fixedly installed at two ends of the first cylinder barrel respectively, the first piston is arranged in the first cylinder barrel in a sliding mode, and the first cylinder barrel is divided into a first oil chamber and a first air chamber by the first piston; the first piston rod is fixedly connected with the first piston, and the axis of the first piston rod is collinear with the axis of the first cylinder barrel; the second gas-liquid cylinder comprises a second cylinder barrel, a second front cover, a second rear cover and a second piston, the second front cover and the second rear cover are fixedly installed at two ends of the second cylinder barrel respectively, the second piston is arranged in the second cylinder barrel in a sliding mode, the second cylinder barrel is divided into a second oil chamber and a second gas chamber by the second piston, the second oil chamber is communicated with the first oil chamber, and hydraulic oil is arranged in the first oil chamber and the second oil chamber; the start-stop valve is arranged on an oil way between the first oil chamber and the second oil chamber, and the speed and the on-off of hydraulic oil exchange in the oil way are controlled by the start-stop valve; the positioning mechanism comprises a connecting plate, a guide rod, a mounting piece and a displacement sensor, the mounting piece is fixedly connected with the first cylinder barrel, a guide hole is formed in the mounting piece, the guide rod is in sliding fit with the guide hole, the guide rod is fixedly connected with the first piston rod through the connecting plate, and the displacement sensor is used for measuring displacement of the guide rod.
Optionally, the first front cover and the second front cover are fixedly connected, the first rear cover and the second rear cover are fixedly connected, and the first piston rod and the first front cover are in sliding fit.
Optionally, the first front cover and the second front cover are provided with oil passages, and the first oil chamber and the second oil chamber are communicated through the oil passages.
Optionally, open and stop the valve and include valve body, motor, needle and transmission assembly, the motor with valve body fixed connection, the needle with valve body sliding fit, the motor passes through transmission assembly with the needle transmission is connected, the needle with the oil circuit matches.
Optionally, the transmission assembly comprises a gear and a rack, the gear and the motor are coaxially and fixedly connected, the rack and the valve needle are fixedly connected, and the gear and the rack are meshed with each other.
Optionally, the transmission assembly includes a screw rod, the screw rod is coaxially and fixedly connected with an output shaft of the motor, and the screw rod is in threaded connection with the valve needle.
Optionally, the second pneumatic cylinder further includes a second piston rod, the second piston rod is fixedly connected to the second piston, and the second piston rod is in sliding fit with the second front cover.
Optionally, the second pneumatic cylinder further includes a second piston rod, the second piston rod is fixedly connected to the second piston, the second piston rod is in sliding fit with the second rear cover, and the first piston rod is in sliding fit with the first rear cover.
Optionally, the device further comprises a pressurizing cylinder, wherein the pressurizing cylinder comprises a pressurizing oil cylinder, a pressurizing air cylinder, a pressurizing piston, a pressurizing push rod, a pressurizing front cover, a pressurizing middle cover, a pressurizing rear cover and a pressurizing electromagnetic valve.
The fixed setting of pressure boost hydro-cylinder is in the pressure boost protecgulum with between the lid in the pressure boost, pressure boost cylinder is fixed to be set up in the pressure boost lid with between the lid behind the pressure boost, pressure boost piston slides and sets up inside the pressure boost cylinder, pressure boost push rod with pressure boost piston fixed connection, pressure boost push rod with lid sliding fit in the pressure boost, pressure boost hydro-cylinder with first grease chamber's intercommunication, pressure boost hydro-cylinder and second grease chamber's intercommunication, first grease chamber with the second grease chamber with all be provided with the pressure boost solenoid valve between the pressure boost hydro-cylinder.
Optionally, still include the PLC controller, the PLC controller with motor electric connection.
A control method for timely starting, stopping and uniformly-speed-controllable cylinders comprises the following steps:
cylinder expansion and contraction: first air chamber with the second air chamber all communicates the solenoid valve, open and stop the valve and open, through open and stop the size that the valve opened the passageway, control first grease chamber with the speed of hydraulic oil exchange between the second grease chamber, thereby realize control the speed that the cylinder impeld and contracts, through the solenoid valve to let in the air supply in the first air chamber, the air supply promotes first piston with first piston rod motion, first piston rod stretches out first cylinder, hydraulic oil enters into through the oil circuit in the first grease chamber the second grease chamber, gaseous process in the second air chamber the solenoid valve discharges, and is on the same way, through the solenoid valve to let in the air supply in the second air chamber, the air supply promotes the second piston motion, the second piston promotes in the second grease chamber hydraulic oil enters into first grease chamber, hydraulic oil promotes first piston motion, first piston drives first piston rod withdrawal in the first cylinder, gaseous process solenoid valve discharge in the first air chamber.
Starting and stopping the air cylinder: when the first piston rod is pushed in, the position of the guide rod can be obtained through the displacement sensor, so that the stroke of the first piston rod is known, when the first piston rod runs to a preset position, the displacement sensor obtains the position at the moment and transmits a signal to the controller, the controller controls the start-stop valve to be closed, the first piston rod stops moving due to the blocking of hydraulic oil, and when the start-stop valve is opened again, the first piston rod continues moving.
As described above, the cylinder with controllable start-stop and constant speed and the control method of the invention have at least the following beneficial effects:
1. the air source is introduced into the first air chamber, the air source pushes the first piston to move in the first cylinder barrel, hydraulic oil in the first oil chamber enters the second oil chamber under the pushing of the first piston, and the second piston descends to discharge air in the second air chamber under the pushing of the hydraulic oil; the air source is used for pushing the second piston to move in the second cylinder barrel by introducing the air source to the second air chamber, hydraulic oil in the second oil chamber enters the first oil chamber under the pushing action of the second piston, the hydraulic oil pushes the first piston to move, and the first piston drives the first piston rod to reciprocate; thereby through open and stop the valve control hydraulic oil break-make and flow in the oil circuit realize opening of control cylinder and the rate of motion of first piston rod, first piston rod motion stability is high, opens and stops the precision height.
2. Because be provided with in the second pneumatic-hydraulic cylinder the second piston rod, when first air chamber increases under the air supply effect, first piston promotes first piston rod impels, hydraulic oil promotes the contraction of second piston rod, otherwise, when first piston rod contracts, the second piston rod impels, the flexible speed of first piston rod with the flexible speed of second piston rod is unanimous, and the opposite direction, and two piston rod motions are opposite, and the harmony is good.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of a cylinder with controllable constant speed and starting and stopping in time according to the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic diagram showing the operation of a cylinder with controllable constant speed and starting and stopping in time according to the present invention;
FIG. 4 is a schematic diagram showing the operation of a cylinder with double pistons, which can be started and stopped in time and has a constant speed;
fig. 5 is a structural cross-sectional view of a pressure cylinder of a cylinder with controllable constant speed and starting and stopping in time according to the present invention.
Description of reference numerals:
1. a first gas-liquid cylinder; 101. a first cylinder; 102. a first front cover; 103 a first rear cover; 104. a first piston; 105. a first piston rod; 111. a first oil chamber; 112. a first air chamber;
2. a second pneumatic-hydraulic cylinder; 201 a second cylinder; 202. a second front cover; 203. a second rear cover; 204. a second piston; 205. a second piston rod; 211. a second oil chamber; 212. a second air chamber;
3. starting and stopping the valve; 301. a valve body; 302. a motor; 303. a valve needle; 304. a transmission assembly;
401. a pressurizing oil cylinder; 402. a booster cylinder; 403. a booster piston; 404. a pressurizing push rod; 405. a pressurized front cover; 406. a pressurizing middle cover; 407. a pressurized rear cover;
5. an oil path;
6. an electromagnetic valve;
7. a positioning mechanism; 701. a guide bar; 702. a connection plate 703, a mounting member; 7031. a guide hole; 704. and a displacement sensor.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 5. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions of the present disclosure, so that the present disclosure is not limited to the technical essence, and any modifications of the structures, changes of the ratios, or adjustments of the sizes, can still fall within the scope of the present disclosure without affecting the function and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The following examples are for illustrative purposes only. The various embodiments may be combined, and are not limited to what is presented in the following single embodiment.
Referring to fig. 1 to 3, the present invention provides a timely start-stop and uniform speed controllable cylinder, which includes: the first gas-liquid cylinder 1 comprises a first cylinder barrel 101, a first front cover 102, a first rear cover 103 and a first piston 104, the first front cover 102 and the first rear cover 103 are respectively and fixedly installed at two ends of the first cylinder barrel 101, the first piston 104 is arranged in the first cylinder barrel 101 in a sliding manner, and the first cylinder barrel 101 is divided into a first oil chamber 111 and a first air chamber 112 by the first piston 104; the first piston rod 105 and the first piston 104 are fixedly connected, and the axis of the first piston rod 105 and the axis of the first cylinder 101 are collinear; the second gas-liquid cylinder 2 comprises a second cylinder 201, a second front cover 202, a second rear cover 203 and a second piston 204, the second front cover 202 and the second rear cover 203 are respectively fixedly installed at two ends of the second cylinder 201, the second piston 204 is slidably arranged inside the second cylinder 201, the second piston 204 divides the second cylinder 201 into a second oil chamber 211 and a second gas chamber 212, the second oil chamber 211 is communicated with the first oil chamber 111, and hydraulic oil is arranged in the first oil chamber 111 and the second oil chamber 211; the start-stop valve 3 is arranged on an oil way 5 between the first oil chamber 111 and the second oil chamber 211, the speed and the on-off of hydraulic oil exchange in the oil way 5 are controlled by the start-stop valve 3, and the first air chamber 112 is communicated with the second air chamber 212 and the electromagnetic valve 6.
The positioning mechanism 7 comprises a connecting plate 702, a guide rod 701, a mounting part 703 and a displacement sensor 704, the mounting part 703 is fixedly connected with the first cylinder 101, the mounting part 703 and the first cylinder 101 can be integrally formed or fixedly connected in a bolt, welding or other mode, a guide hole 7031 is formed in the mounting part 703, the guide rod 701 is in sliding fit with the guide hole 7031, the guide rod 701 is fixedly connected with the first piston rod 105 through the connecting plate 702, the displacement sensor 704 is fixedly mounted on the mounting part 703, and the displacement sensor 704 is used for measuring the displacement of the guide rod movement, so that the stroke of the first piston rod 105 is constantly monitored. The guide rod 701 may also prevent the first piston rod 105 from rotating. Two sets of the guide rods 701 may be symmetrically disposed on both sides of the first piston rod 105.
By introducing an air source into the first air chamber 112, the air source pushes the first piston 104 to move in the first cylinder 101, hydraulic oil in the first oil chamber 111 enters the second oil chamber 211 under the pushing of the first piston 104, and the second piston 204 discharges air in the second air chamber 212 from the solenoid valve 6 under the pushing of the hydraulic oil; by introducing an air source to the second air chamber 212, the air source pushes the second piston 204 to move in the second cylinder 201, hydraulic oil in the second oil chamber 211 enters the first oil chamber 111 under the pushing of the second piston 204, the hydraulic oil pushes the first piston 104 to move, and the first piston 104 drives and drives the first piston rod 105 to reciprocate; the on-off and flow of hydraulic oil in the oil way 5 are controlled through the on-off valve 3, so that the on-off of the cylinder and the movement speed of the first piston rod 105 are controlled, the movement stability of the first piston rod 105 is high, and the on-off precision is high.
In this embodiment, referring to fig. 1 to fig. 3, the first front cover 102 is fixedly connected to the second front cover 202, the first rear cover 103 is fixedly connected to the second rear cover 203, and the first piston rod 105 is slidably engaged with the first front cover 102, so that the structure is compact and the sealing performance is good.
In this embodiment, referring to fig. 1 to fig. 3, the first front cover 102 and the second front cover 202 are provided with an oil path 5, and the first oil chamber 111 and the second oil chamber 211 are communicated through the oil path 5, so that the structure is compact and the sealing performance is good.
In this embodiment, referring to fig. 1 to 5, the start-stop valve 3 includes a valve body 301, a motor 302, a valve needle 303, and a transmission assembly 304, the motor 302 is fixedly connected to the valve body 301, the valve needle 303 is in sliding fit with the valve body 301, the motor 302 is in transmission connection with the valve needle 303 through the transmission assembly 304, and the valve needle 303 is matched with the oil passage 5.
In this embodiment, the action principle of the cylinder which is started and stopped in time and has a controllable uniform speed is as follows:
assuming that the total stroke of the start-stop valve 3 is 11mm, the total pulse of the motor 302 is 5700 times, so that 518 pulses required for the valve needle 303 to move 1mm can be obtained, and the flow rate and opening and closing of the hydraulic oil can be controlled by precisely controlling the opening space of the start-stop valve 3 by controlling the pulse amount.
In this embodiment, referring to fig. 1-3, the transmission assembly 304 includes a gear and a rack, the gear is coaxially and fixedly connected with the motor 302, the rack is fixedly connected with the valve needle 303, and the gear and the rack are engaged with each other. The gear is driven to rotate by the motor 302, the gear drives the rack to convert the rotation motion into the linear motion of the rack, and the rack drives the valve needle 303 to do linear reciprocating motion.
In this embodiment, referring to fig. 1 to fig. 3, the transmission assembly 304 includes a screw rod, the screw rod is coaxially and fixedly connected with the output shaft of the motor 302, and the screw rod is in threaded connection with the valve needle 303. The motor 302 drives the screw rod to rotate, and the valve needle 303 makes linear motion in the valve body 301 in the rotating process of the screw rod.
In this embodiment, referring to fig. 1 to fig. 5, the second pneumatic cylinder 2 further includes a second piston rod 205, the second piston rod 205 is fixedly connected to the second piston 204, and the second piston rod 205 is slidably engaged with the second front cover 202. Because the second piston rod 205 is arranged in the second pneumatic-hydraulic cylinder 2, when the first air chamber 112 is enlarged under the action of an air source, the first piston 104 pushes the first piston rod 105 to push, and the hydraulic oil pushes the second piston rod 205 to contract, otherwise, when the first piston 104 rod 105 contracts, the second piston rod 205 pushes, and the telescopic speed of the first piston rod 105 is consistent with that of the second piston rod 205, and the two piston rods can be used for loading and unloading of products on a production line, and the like.
In this embodiment, referring to fig. 1 to fig. 5, the second pneumatic/hydraulic cylinder 2 further includes a second piston rod 205, the second piston rod 205 is fixedly connected to the second piston 204, the second piston rod 205 is slidably engaged with the second rear cover 203, and the first piston rod 105 is slidably engaged with the first rear cover 103. Due to the fact that the second piston rod 205 is arranged in the second pneumatic-hydraulic cylinder 2, when the first air chamber 112 is enlarged under the action of an air source, the first piston 104 pushes the first piston rod 105 to contract, and the hydraulic oil pushes the second piston rod 205 to advance, on the contrary, when the first piston 104 pushes the rod 105 to advance, the second piston rod 205 contracts, and the expansion speed of the first piston rod 105 is consistent with the expansion speed of the second piston rod 205.
In this embodiment, please refer to fig. 1 to 5, further comprising a pressurizing cylinder, wherein the pressurizing cylinder comprises a pressurizing oil cylinder 401, a pressurizing air cylinder 402, a pressurizing piston 403, a pressurizing push rod 404, a pressurizing front cover 405, a pressurizing middle cover 406, a pressurizing rear cover 407 and a pressurizing electromagnetic valve;
the booster cylinder 401 is arranged between the booster front cover 405 and the booster middle cover 406, the booster cylinder 402 is arranged between the booster middle cover 406 and the booster rear cover 407, the booster piston 403 is arranged in the booster cylinder 402 in a sliding manner, the booster push rod 404 is fixedly connected with the booster piston 403, the booster push rod 404 is in sliding fit with the booster middle cover 406, the booster cylinder 401 is communicated with the first oil chamber 111, the booster cylinder 401 is communicated with the second oil chamber 211, and booster solenoid valves are arranged between the first oil chamber 111 and the second oil chamber 211 and the booster cylinder 401.
In this embodiment, please refer to fig. 1 to 5, further comprising a PLC controller, wherein the PLC controller is electrically connected to the motor 302, and the PLC controller controls the number of rotation pulses of the motor 302 to control the stroke of the valve needle 303, so as to control the timely start and stop, and the movement speed and start and stop of the uniform speed controllable cylinder.
A control method for timely starting and stopping a cylinder with a controllable constant speed comprises the following steps:
cylinder expansion and contraction: the first air chamber 112 and the second air chamber 212 are both communicated with an electromagnetic valve 6, the electromagnetic valve 6 can be a two-position five-way electromagnetic valve, and air source reversing is realized through the electromagnetic valve 6. Open and stop valve 3 and open the passageway of certain width, through the size that open the passageway of opening stop valve 3, control first grease chamber 111 with the speed of hydraulic oil exchange between the second grease chamber 211, thereby realize control the cylinder impels and the speed of shrink, through solenoid valve 6 to let in the air supply in the first air chamber 112, the air supply promotes first piston 104 with first piston rod 105 moves, first piston rod 105 stretches out first cylinder 101, hydraulic oil enters into through oil circuit 5 in the first grease chamber 111 the second grease chamber 211, gaseous process in the second air chamber 212 the solenoid valve 6 discharges, and is on the same hand, through solenoid valve 6 to let in the second air chamber 212 the air supply, the air supply promotes second piston 204 moves, second piston 204 promotes in the second grease chamber 211 hydraulic oil enters into first grease chamber 111, hydraulic oil promotes first piston 104 moves, first piston 104 drives first piston rod 105 retracts in first cylinder 101, gaseous process solenoid valve 6 discharge in the first air chamber 112.
Starting and stopping the air cylinder: when the first piston rod 105 is in the pushing process, the position of the guide rod 701 can be obtained through the displacement sensor 704, so that the stroke of the first piston rod 105 is known, when the first piston rod 105 runs to a preset position, the displacement sensor 704 obtains the current position and transmits a signal to the controller, the controller controls the start-stop valve 3 to be closed, the first piston rod 105 stops moving due to the blocking of hydraulic oil, the start-stop valve 3 is closed because the hydraulic oil is difficult to compress, the stop precision of the first piston rod 105 is high, and when the start-stop valve 3 is opened again, the first piston rod 105 continues to move. Therefore, starting and stopping at any position and positioning at any position are realized.
In summary, by introducing an air source into the first air chamber 112, the air source pushes the first piston 104 to move in the first cylinder 101, the hydraulic oil in the first oil chamber 111 enters the second oil chamber 211 under the pushing of the first piston 104, and the second piston 204 descends the air in the second air chamber 212 to be discharged under the pushing of the hydraulic oil; by introducing an air source to the second air chamber 212, the air source pushes the second piston 204 to move in the second cylinder 201, hydraulic oil in the second oil chamber 211 enters the first oil chamber 111 under the pushing of the second piston 204, the hydraulic oil pushes the first piston 104 to move, and the first piston 104 drives and drives the first piston rod 105 to reciprocate; the on-off and flow of hydraulic oil in the oil way 5 are controlled through the on-off valve 3, so that the on-off of the cylinder and the movement speed of the first piston rod 105 are controlled, the movement stability of the first piston rod 105 is high, and the on-off precision is high. Therefore, the invention effectively overcomes the defects that the air cylinder in the prior art has uneven running speed, clamping stagnation and the like when the air pressure is small or unstable, and the starting and stopping precision at any position is low.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. The utility model provides a in time open and stop, controllable cylinder of uniform velocity, its characterized in that includes:
the first air-liquid cylinder is arranged in the air-liquid cylinder,
the first gas-liquid cylinder comprises a first cylinder barrel, a first front cover, a first rear cover, a first piston and a first piston rod,
the first front cover and the first rear cover are fixedly installed at two ends of the first cylinder respectively, the first piston is arranged in the first cylinder in a sliding mode, the first cylinder is divided into a first oil chamber and a first air chamber by the first piston, the first piston rod is fixedly connected with the first piston, and the axis of the first piston rod is collinear with the axis of the first cylinder;
a second pneumatic-hydraulic cylinder,
the second pneumatic-hydraulic cylinder comprises a second cylinder barrel, a second front cover, a second rear cover and a second piston,
the second front cover and the second rear cover are fixedly installed at two ends of the second cylinder respectively, the second piston is arranged in the second cylinder in a sliding mode, the second cylinder is divided into a second oil chamber and a second air chamber by the second piston, the second oil chamber is communicated with the first oil chamber, and hydraulic oil is arranged in the first oil chamber and the second oil chamber;
the valve is started and stopped, and when the valve is started and stopped,
the start-stop valve is arranged between the first oil chamber and the second oil chamber, and the switching speed and the on-off of the hydraulic oil in the first oil chamber and the second oil chamber are controlled through the start-stop valve;
a positioning mechanism is arranged on the base plate,
the positioning mechanism comprises a connecting plate, a guide rod, a mounting piece and a displacement sensor, the mounting piece is fixedly connected with the first cylinder barrel, a guide hole is formed in the mounting piece, the guide rod is in sliding fit with the guide hole, the guide rod is fixedly connected with the first piston rod through the connecting plate, and the displacement sensor is used for measuring displacement of the guide rod.
2. The cylinder with controllable on-time start-stop and uniform speed according to claim 1, characterized in that: the first front cover is fixedly connected with the second front cover, the first rear cover is fixedly connected with the second rear cover, and the first piston rod is in sliding fit with the first front cover.
3. The cylinder capable of controlling the speed of the cylinder to timely start and stop and to uniformly speed according to claim 2, wherein: the first front cover and the second front cover are provided with oil passages, and the first oil chamber and the second oil chamber are communicated through the oil passages.
4. The cylinder with controllable on-time start-stop and uniform speed according to claim 1, characterized in that: open and stop the valve and include valve body, motor, needle and drive assembly, the motor with valve body fixed connection, the needle with valve body sliding fit, the motor passes through drive assembly with the needle transmission is connected, the needle with first grease chamber with oil circuit between the second grease chamber matches.
5. The cylinder with controllable on-time start-stop and uniform speed according to claim 4, characterized in that: the transmission assembly comprises a gear and a rack, the gear is coaxially and fixedly connected with the motor, the rack is fixedly connected with the valve needle, and the gear is meshed with the rack.
6. The cylinder capable of controlling the speed of the constant speed and starting and stopping in time according to claim 4, wherein: the transmission assembly comprises a screw rod, the screw rod is coaxially and fixedly connected with an output shaft of the motor, and the screw rod is in threaded connection with the valve needle.
7. The cylinder capable of controlling the speed of the cylinder to timely start and stop and to uniformly speed according to claim 2, wherein: the second pneumatic-hydraulic cylinder further comprises a second piston rod, the second piston rod is fixedly connected with the second piston, and the second piston rod is in sliding fit with the second front cover.
8. The cylinder capable of controlling the speed of the constant speed and starting and stopping in time according to claim 1, wherein: the second pneumatic-hydraulic cylinder further comprises a second piston rod, the second piston rod is fixedly connected with the second piston, the second piston rod is in sliding fit with the second rear cover, the axis of the second piston rod is collinear with the axis of the second cylinder barrel, and the first piston rod is in sliding fit with the first rear cover.
9. The cylinder with controllable on-time start-stop and uniform speed according to claim 8, characterized in that: the device also comprises a pressurizing cylinder, wherein the pressurizing cylinder comprises a pressurizing oil cylinder, a pressurizing air cylinder, a pressurizing piston, a pressurizing push rod, a pressurizing front cover, a pressurizing middle cover, a pressurizing rear cover and a pressurizing electromagnetic valve;
the fixed setting of pressure boost hydro-cylinder is in the pressure boost protecgulum with between the lid in the pressure boost, pressure boost cylinder is fixed to be set up in the pressure boost lid with between the lid behind the pressure boost, pressure boost piston slides and sets up inside the pressure boost cylinder, pressure boost push rod with pressure boost piston fixed connection, pressure boost push rod with lid sliding fit in the pressure boost, pressure boost hydro-cylinder with first grease chamber's intercommunication, pressure boost hydro-cylinder and second grease chamber's intercommunication, first grease chamber with the second grease chamber with all be provided with the pressure boost solenoid valve between the pressure boost hydro-cylinder.
10. A control method for a timely starting, stopping and constant speed controllable cylinder is suitable for the timely starting, stopping and constant speed controllable cylinder as claimed in claim 4, and is characterized by comprising the following steps:
cylinder expansion and contraction: the first air chamber and the second air chamber are communicated with an electromagnetic valve, the start-stop valve is opened, the speed of hydraulic oil exchange between the first oil chamber and the second oil chamber is controlled through the size of an opening channel of the start-stop valve, so that the advancing and contracting speed of the cylinder is controlled, an air source is introduced into the first air chamber through the electromagnetic valve, the air source pushes the first piston and the first piston rod to move, the first piston rod extends out of the first cylinder barrel, hydraulic oil in the first oil chamber enters the second oil chamber through an oil way, gas in the second air chamber is discharged through the electromagnetic valve, similarly, the air source is introduced into the second air chamber through the electromagnetic valve, the air source pushes the second piston to move, the second piston pushes the hydraulic oil in the second oil chamber to enter the first oil chamber, the hydraulic oil pushes the first piston to move, the first piston drives the first piston rod to retract into the first cylinder barrel, and gas in the first air chamber is discharged through the electromagnetic valve;
starting and stopping the air cylinder: when the first piston rod is pushed, the position information of the guide rod is obtained through the displacement sensor, so that the stroke of the first piston rod is known, when the first piston rod runs to a set position, the displacement sensor obtains the position information at the moment and transmits a signal to the controller, the controller controls the start-stop valve to be closed, the first piston rod stops moving due to the blockage of hydraulic oil, and when the start-stop valve is opened again, the first piston rod continues moving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310085861.3A CN115789013A (en) | 2023-02-09 | 2023-02-09 | Timely start-stop constant-speed controllable cylinder and control method |
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| CN202310085861.3A CN115789013A (en) | 2023-02-09 | 2023-02-09 | Timely start-stop constant-speed controllable cylinder and control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205446219U (en) * | 2015-12-27 | 2016-08-10 | 天津尚吉液压设备有限公司 | Gas -liquid booster |
| CN108825699A (en) * | 2018-08-24 | 2018-11-16 | 山东万通液压股份有限公司 | The double gas chamber plunger type accumulators of hydro pneumatic suspension |
| CN210978051U (en) * | 2019-10-23 | 2020-07-10 | 武汉科技大学 | Energy-saving two-cylinder high-pressure plunger hydraulic cylinder |
| CN212928369U (en) * | 2020-08-07 | 2021-04-09 | 浙江中世智能装备科技股份有限公司 | Oil pressure cylinder with self-locking function |
| CN218151766U (en) * | 2022-08-16 | 2022-12-27 | 郑煤机智鼎液压有限公司 | Oil cylinder with external displacement sensor structure |
-
2023
- 2023-02-09 CN CN202310085861.3A patent/CN115789013A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205446219U (en) * | 2015-12-27 | 2016-08-10 | 天津尚吉液压设备有限公司 | Gas -liquid booster |
| CN108825699A (en) * | 2018-08-24 | 2018-11-16 | 山东万通液压股份有限公司 | The double gas chamber plunger type accumulators of hydro pneumatic suspension |
| CN210978051U (en) * | 2019-10-23 | 2020-07-10 | 武汉科技大学 | Energy-saving two-cylinder high-pressure plunger hydraulic cylinder |
| CN212928369U (en) * | 2020-08-07 | 2021-04-09 | 浙江中世智能装备科技股份有限公司 | Oil pressure cylinder with self-locking function |
| CN218151766U (en) * | 2022-08-16 | 2022-12-27 | 郑煤机智鼎液压有限公司 | Oil cylinder with external displacement sensor structure |
Non-Patent Citations (1)
| Title |
|---|
| 赵汝和等: "液气压传动与控制", 上海科学技术文献出版社 * |
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