CN110686057A - High-thrust parallel electric cylinder and control method - Google Patents
High-thrust parallel electric cylinder and control method Download PDFInfo
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- CN110686057A CN110686057A CN201910994929.3A CN201910994929A CN110686057A CN 110686057 A CN110686057 A CN 110686057A CN 201910994929 A CN201910994929 A CN 201910994929A CN 110686057 A CN110686057 A CN 110686057A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/2015—Means specially adapted for stopping actuators in the end position; Position sensing means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2204—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/028—Gearboxes; Mounting gearing therein characterised by means for reducing vibration or noise
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0434—Features relating to lubrication or cooling or heating relating to lubrication supply, e.g. pumps ; Pressure control
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2081—Parallel arrangement of drive motor to screw axis
Abstract
A high-thrust parallel electric cylinder and a control method belong to the technical field of motion simulation tests. The alternating current servo motor is connected with a transmission box, a main shaft of the alternating current servo motor is connected with a driving wheel, the driving wheel is connected with a transmission belt, the transmission belt is connected with a driven wheel, the driven wheel is connected with an output shaft, the output shaft and a ball screw are integrated, the other end of the ball screw is connected with a screw guide sleeve and positioned in a piston rod, one end of a cylinder barrel is connected with the transmission box through a bearing seat, the other end of the cylinder barrel is connected with a cylinder head guide piece, two ends of an inner cavity of the cylinder barrel are respectively provided with buffer rubber, the buffer rubber comprises upper buffer rubber and lower buffer rubber, the lower stroke end is provided with lower buffer rubber, the lower buffer rubber is sleeved on the ball screw and connected with the bearing seat, and the upper, the device has the characteristics of stable operation, quick response, high acceleration, wide frequency band, long service life and the like, and is suitable for a high-precision test simulation platform.
Description
Technical Field
The invention relates to a high-thrust parallel electric cylinder and a control method, and belongs to the technical field of motion simulation tests.
Background
The electric cylinder is a device which converts the rotary motion of a servo motor into the linear motion of a piston rod to do work and drive the cylinder rod of the electric cylinder to stretch and generate push-pull force. The motion precision of electronic jar is high, the response is fast, the rigidity is good, has replaced servo pneumatic cylinder in many fields, and it is different from electric putter: the electric push rod is driven by a common motor to change the speed of the speed reducer; the electric cylinder uses an alternating current servo motor, and flexible, stepless speed change and reversing are realized. The traditional electric cylinder has two structural forms of direct connection and parallel connection, the rotary motion of a motor is transmitted to a lead screw through a transmission speed change system (a synchronous belt, a shaft coupling and the like), and the electric cylinder with the structure has low mechanical efficiency and inaccurate control precision.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a high-thrust parallel electric cylinder and a control method.
In order to achieve the purpose, the invention provides a high-thrust parallel electric cylinder and a control method,
a high-thrust parallel electric cylinder is characterized in that an alternating-current servo motor is connected with a transmission box, a main shaft of the alternating-current servo motor is connected with a driving wheel, the driving wheel is connected with a transmission belt, the transmission belt is connected with a driven wheel, the driven wheel is connected with an output shaft, the output shaft and a ball screw are of an integrated rigid structure, the other end of the ball screw is connected with a screw guide sleeve and positioned inside a piston rod, one end of a cylinder barrel is connected with the transmission box through a bearing seat, the other end of the cylinder barrel is connected with a cylinder head guide piece, both ends of an inner cavity of the cylinder barrel are provided with buffer rubber, the buffer rubber comprises upper buffer rubber and lower buffer rubber, the lower stroke end is provided with lower buffer rubber, the lower buffer rubber is sleeved on the ball screw and connected with the bearing seat, the upper stroke end is provided with upper buffer rubber, the upper buffer rubber is fixedly compressed through the connection of the cylinder, the piston rod realizes linear motion through the guide of the cylinder head guide piece and the guide ring.
A first sensor and a second sensor are respectively installed at two ends of the cylinder barrel, and a first strong current protection device and a second strong current protection device are respectively arranged at two terminals of the effective stroke of the piston rod.
The other end of the piston rod is connected with the connecting anti-rotation device.
The first sensor and the second sensor are respectively arranged at two terminals of the effective stroke of the piston rod, and the box body of the transmission box is provided with a bearing which is respectively connected with and supports the output shaft and the main shaft.
The main generation part of the ball screw is wrapped inside by the piston rod, a guide ring made of a nonmetal friction material is arranged on the periphery of the piston rod, the piston rod is isolated from the cylinder barrel, and grease is filled in a gap; the ball screw is a mute screw.
The piston rod is connected with the connecting anti-rotation device by threads and is locked and prevented from backing by a set screw.
The upper stroke end of the cylinder barrel is provided with upper buffer rubber, and the lower stroke end of the cylinder barrel is provided with lower buffer rubber.
The cylinder barrel is provided with a front end lubricating device and a rear end lubricating device, one end of the piston rod is provided with a piston rod lubricating device, and the oil injection lubricating device is positioned between the cylinder barrel and the transmission case.
The first dustproof ventilation device is connected to the top of the piston rod, and the second dustproof ventilation device is installed at one end of the cylinder barrel.
A control method of a high-thrust parallel electric cylinder comprises the following steps; according to the instruction of the main control computer, the linear motion of the electric cylinder is accurately controlled in a real-time closed-loop manner, acceleration and deceleration, reversing and various position controls are generated, and the rotary motion is changed into the linear motion to replace a servo oil pressure cylinder.
Electronic jar is furnished with safety arrangement, including overload protection, power-off protection and overtravel protection, the total tertiary of overtravel protection:
and in the first-stage step of computer protection, the computer collects signals of two terminal sensors of the effective stroke, and the automatic termination of movement is realized to realize weak current automatic protection.
And in the second stage of strong current protection, the electric cylinder rushes through the first sensor or the second sensor to trigger the first strong current protection device or the second strong current protection device, so that forced power-off contracting brake protection is realized.
And in the third-stage mechanical protection step, the upper end and the lower end of the cylinder head of the electric cylinder are respectively provided with the buffer rubber, so that the electric cylinder is prevented from being permanently damaged once the electric appliance is out of control in protection, and the electric cylinder can run safely and reliably.
And a lubricating step, namely installing a lubricating device on the cylinder barrel and the piston rod.
And a noise reduction step, wherein an oil bearing sliding pair of the noise reduction device is lubricated by grease, a ball screw is lubricated by lubricating grease, and the noise reduction device is provided with a corresponding oil filling hole and an oil injecting and storing device, a main sounding part screw is wrapped inside a piston, a non-metal low-friction material is arranged on the periphery of the piston, the piston is isolated from a cylinder barrel, and grease is filled in a gap to block noise from being transmitted in the motion of the screw.
And a dustproof ventilation step, wherein two dustproof ventilation devices are arranged at one end of the cylinder barrel for ventilation, and the end part of the piston rod is provided with the dustproof ventilation device when the screw rod runs.
The transmission system adopts a mode that the servo motor is connected with the ball screw in parallel, namely, a motor shaft and the ball screw are connected together through a transmission belt in a transmission box.
In the mounting step of the electric cylinder, the piston rod is in threaded connection with the connection anti-rotation device and is locked and stopped by a set screw to prevent the threads from loosening.
The alternating current servo motor realizes power-off braking, position feedback, self cooling and bearing of the maximum steering force generated by the electric cylinder, and provides servo torque, rotation speed and acceleration for the electric cylinder.
The invention has the following beneficial effects: the invention inherits the advantages of the traditional electric cylinder, and has innovative breakthrough in the aspects of transmission, safety protection, lubrication and the like, the added lubricating device can improve the mechanical efficiency to a certain extent, in particular, the transmission system adopts the integrated design of parallel connection of the servo motor and the ball screw, realizes no creeping and clamping stagnation phenomena of the electric cylinder during low-speed motion, improves the positioning precision, improves the integral control precision, has the characteristics of stable operation, quick response, large acceleration, wide frequency band, long service life and the like, and is suitable for a high-precision test simulation platform.
The electric cylinder provided by the invention can realize large load driving and high-precision control of the electric cylinder, is low in noise during operation, has good safety protection and lubrication measures, and is particularly suitable for a test simulation platform.
Drawings
A more complete appreciation of the invention and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawings, wherein the accompanying drawings are included to provide a further understanding of the invention and form a part of this specification, and wherein the illustrated embodiments of the invention and the description thereof are intended to illustrate and not limit the invention, as illustrated in the accompanying drawings, in which:
FIG. 1 is a block diagram of the present invention.
Fig. 2 is a side view of the present invention.
The invention is further illustrated with reference to the following figures and examples.
Detailed Description
It will be apparent that those skilled in the art can make many modifications and variations based on the spirit of the present invention.
It will be apparent to those skilled in the art that, as used herein, the singular forms "a," "an," "the," and "the" may include the plural forms as well, unless expressly stated otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element, component or section is referred to as being "connected" to another element, component or section, it can be directly connected to the other element or section or intervening elements or sections may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description, "plurality" means two or more unless specifically limited otherwise.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meaning of terms in the present invention can be understood according to specific circumstances.
It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art.
The following further explanation is provided in order to facilitate understanding of the embodiments, and the embodiments are not to be construed as limiting the embodiments.
Example 1: as shown in fig. 1, in the high-thrust parallel electric cylinder, an alternating current servo motor 19 is connected with a transmission case 14, a main shaft 17 of the alternating current servo motor 19 is connected with a driving wheel 18, the driving wheel 18 is connected with a transmission belt, the transmission belt is connected with a driven wheel 16, the driven wheel 16 is connected with an output shaft 15, the output shaft 15 and a ball screw 8 are in an integral structure, and the other end of the ball screw 8 is connected with a screw guide sleeve 22 and is positioned inside a piston rod 7 to guide the ball screw. 6 one end of cylinder 6 is passed through bearing frame 13 and is connected with transmission case 14, the other end is connected with cylinder head guide 2, the inner chamber both ends of cylinder 6 all have cushion rubber, cushion rubber includes cushion rubber 4 and lower cushion rubber 11, the lower stroke end has lower cushion rubber 11, 11 covers of lower cushion rubber are connected with bearing frame 13 on ball 8, the upstroke end has last cushion rubber 4, it compresses tightly its fixed through being connected of cylinder head guide 2 with cylinder 6 to go up cushion rubber 4, the nut that ball 8 matches is connected with the one end of piston rod 7, the nut can be converted into linear motion according to the helical pitch that corresponds the specification along with ball 8's turned angle, piston rod 7 passes through the direction of cylinder head guide 2 and guide ring 9, thereby realize corresponding linear motion.
The other end of the piston rod 7 is connected with the connection anti-rotation device 1, after the connection anti-rotation device 1 is connected with a fixed workpiece, the piston rod 7 can only do linear operation and does not rotate any more, sensors are installed at two ends of the cylinder barrel 6 and are respectively a first sensor 5 and a second sensor 10, and the sensors are arranged at two terminals of the effective stroke of the piston rod 7. The housing of the transmission case 14 is fitted with bearings which respectively connect and support the output shaft 15 and the main shaft 17.
The two ends of the effective stroke of the piston rod 7 are also respectively provided with a first strong electric protection device 21 and a second strong electric protection device 25, and the first strong electric protection device 21 or the second strong electric protection device 25 carries out forced power-off contracting brake protection when the piston rod passes through the first sensor 5 or the second sensor 10.
The upper stroke end of the cylinder barrel 6 is provided with an upper buffer rubber 4, and the lower stroke end of the cylinder barrel 6 is provided with a lower buffer rubber 11.
The cylinder 6 is provided with a lubricating device which comprises a front end lubricating device 3 and a rear end lubricating device 20, one end of the piston rod 7 is provided with a piston rod lubricating device 23, and the oil injection lubricating device 12 is positioned between the cylinder 6 and the transmission case 14.
Electronic jar global design is for making an uproar structure of falling, and piston rod 7 wraps up ball 8's main position of taking place inside, and piston rod 7 periphery has non-metallic friction material's guide ring 9, keeps apart piston rod and cylinder, and clearance department has the grease to fill, hinders the noise propagation. The ball screw 8 is a silent screw.
A first dust-proof breather 24 is connected to the top of the piston rod 7, and a second dust-proof breather 26 is mounted at one end of the cylinder tube 6. The piston rod 7 is connected with the connecting anti-rotation device 1 by threads and is locked and prevented from backing by a set screw.
The dust-tight vent includes a first dust-tight vent 24 and a second dust-tight vent 26. The dustproof ventilating device can be selected from the prior art products such as a silencer and the like.
The lubricating device can be selected from funnel type oil cups matched with the oil filling holes and other prior art products.
The sensor may be selected from prior art products such as proximity switches.
The first and second heavy-current protection devices 21 and 25 may be any conventional product such as a contact switch.
Example 2: as shown in fig. 1, a high thrust parallel electric cylinder, servo motor and ball adopt the design of parallel transmission formula, and it has characteristics such as operate steadily, response is quick, big acceleration, broadband, long-life, includes: exchange servo motor 19, transmission case 14, ball 8, cylinder 6, piston rod 7, the inside drive belt that is equipped with of transmission case 14, exchange servo motor 19 and the interior drive belt input of transmission case 14 and be connected, piston rod 7 is connected with ball 8's one end and sets up in cylinder 6, ball 8's the other end is connected with the output of the interior drive belt of transmission case 14 to be connected with supplementary bearing in transmission case 14, realized ball 8 and exchange servo motor 19's parallel structure.
The utility model provides an electronic jar of high thrust parallel, still includes a plurality of sensors, and the sensor sets up in two terminals of 7 effective strokes of piston rod, divide into weak current protection device: first sensor 5, second sensor 10, strong electric break protection device: a first strong electric protection device 21 and a second strong electric protection device 25.
The upper stroke end of the cylinder barrel 6 is provided with an upper buffer rubber 4, and the lower stroke end of the cylinder barrel 6 is provided with a lower buffer rubber 11.
The lubricating device includes a front end lubricating device 3 and a rear end lubricating device 20 at both ends of the cylinder tube 6.
Electronic jar global design is for making an uproar structure of falling, and piston rod 7 wraps up ball 8's main position of taking place inside, and piston rod 7 periphery has non-metallic friction material's guide ring 9, keeps apart piston rod and cylinder, and clearance department has the grease to fill, hinders the noise propagation.
The ball screw 8 is a silent screw.
The transmission case 14 is internally provided with a transmission belt.
The safety factor when the transmission belt in the transmission case 14 is selected is far higher than the working condition safety factor of the ultra-heavy driving equipment, and the safety requirement and the high-frequency operation feasibility requirement are completely met.
One end of the ball screw 8 is connected with the output end of the transmission belt in the transmission case 14 and is connected with the auxiliary support bearing in the transmission case 14.
Example 3: as shown in fig. 1, a high thrust parallel electric cylinder includes: the device comprises a connection rotation preventing device 1, a cylinder head guide part 2, a front end lubricating device 3, an upper buffer device 4, a first sensor 5, a cylinder barrel 6, a piston rod 7, a ball screw 8, a guide ring 9, a second sensor 10, a lower buffer rubber 11, an oil injection lubricating device 12, a bearing seat 13, a transmission case 14, an output shaft 15, a driven wheel 16, a main shaft 17, a driving wheel 18, an alternating current servo motor 19, a rear end lubricating device 20, a first strong current protection device 21, a screw guide sleeve 22, a piston rod lubricating device 23, a first dustproof ventilation device 24, a second strong current protection device 25 and a second dustproof ventilation device 26. The inside drive belt and the auxiliary stay bearing that are equipped with of transmission case 14, the main shaft 17 and the 14 interior drive belt input of transmission case of alternating current servo motor 19 are connected, and connect the inside auxiliary stay bearing of transmission case 14, piston rod 7 is connected with ball 8's nut and sets up in cylinder 6, ball 8's one end output shaft 15 is connected with the 14 interior drive belt output of transmission case, and be connected with the 14 interior auxiliary stay bearing of transmission case, ball 8 and alternating current servo motor 17's parallel structure has been realized.
The servo motor and the ball screw of the high-thrust parallel electric cylinder are designed in a parallel transmission mode, and the high-thrust parallel electric cylinder has the characteristics of stable operation, quick response, high acceleration, wide frequency band, long service life and the like.
A control method of a high-thrust parallel electric cylinder comprises the following steps; according to the instruction of the main control computer, the linear motion of the electric cylinder is accurately controlled in a real-time closed-loop manner, acceleration and deceleration, reversing and various position controls are generated, and the rotary motion is changed into the linear motion to replace a servo oil pressure cylinder.
Electronic jar is furnished with safety arrangement, including overload protection, power-off protection and overtravel protection, the total tertiary of overtravel protection:
first, computer protection. The computer collects the signals of two terminal sensors of the effective stroke, realizes the automatic termination of the movement and realizes the automatic protection of weak current.
Second stage, strong current protection. The electric cylinder rushes through the first sensor 5 or the second sensor 10 to trigger the first strong electric protection device 21 or the second strong electric protection device 25, so that the forced power-off contracting brake protection is realized.
And thirdly, mechanical protection. The upper end and the lower end of the cylinder head of the electric cylinder are respectively provided with the buffer rubber, so that once the electric protection is out of control, the electric cylinder cannot be permanently damaged, and the safe and reliable operation is realized.
The lubricating device comprises lubricating devices on the cylinder barrel and the piston rod, the oil-containing bearing sliding pair of the noise reduction device is lubricated by grease, and the ball screw 8 is lubricated by grease and is provided with a corresponding oil filling hole and an oil injecting and storing device.
Noise reduction design: the 'screw rod' of the main sounding part is wrapped inside the piston. The periphery of the piston is provided with a non-metal low-friction material which isolates the piston from the cylinder barrel, and grease is filled in a gap to block noise transmission. In the motion of the screw rod, the mute screw rod is selected, and the noise reduction measure of the mute screw rod is reduced by 20dB compared with the traditional screw rod.
The dustproof ventilating device comprises: two dustproof ventilators (second dustproof ventilators 26) are arranged at one end of the cylinder barrel for ventilation, and a dustproof ventilator (first dustproof ventilator 24) used when the lead screw runs is arranged at the end part of the piston rod, so that the dustproof ventilator has the function of noise reduction.
The transmission system adopts the parallel design of the servo motor and the ball screw, namely, a motor shaft and the ball screw are connected together through a transmission belt in a transmission box, and the torsional strength of the ball screw shaft is fully considered through theoretical calculation during design.
Installation of the electric cylinder: the piston rod 7 is connected with the connecting anti-rotation device 1 by threads, and is locked and stopped by a set screw to prevent the threads from loosening.
The alternating current servo motor can realize power-off braking, position feedback, self cooling and bear the maximum steering force generated by the electric cylinder, and provides servo torque, rotation speed and acceleration for the electric cylinder.
The high-thrust parallel electric cylinder provided by the invention is described in detail above, and the principle and the implementation mode of the invention are explained by applying specific embodiments in the text, and the description of the embodiments is only suitable for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A high-thrust parallel electric cylinder is characterized in that an alternating-current servo motor is connected with a transmission case, a main shaft of the alternating-current servo motor is connected with a driving wheel, the driving wheel is connected with a transmission belt, the transmission belt is connected with a driven wheel, the driven wheel is connected with an output shaft, the output shaft and a ball screw are of an integral rigid structure, the other end of the ball screw is connected with a screw guide sleeve and positioned inside a piston rod, one end of a cylinder barrel is connected with the transmission case through a bearing seat, the other end of the cylinder barrel is connected with a cylinder head guide piece, both ends of an inner cavity of the cylinder barrel are provided with buffer rubbers, each buffer rubber comprises an upper buffer rubber and a lower buffer rubber, the lower buffer rubber is sleeved on the ball screw and connected with the bearing seat, the upper buffer rubber is arranged at the upper stroke end and fixedly compressed through the connection of the cylinder head guide, the nut can be converted into linear motion along with the rotation angle lead of the ball screw, and the piston rod realizes the linear motion through the guide of the cylinder head guide piece and the guide ring.
2. A high-thrust parallel electric cylinder as claimed in claim 1, characterized by that the cylinder has a first sensor and a second sensor respectively mounted at its two ends, and a first strong electric protector and a second strong electric protector are respectively mounted at the two ends of the effective stroke of the piston rod.
3. A high thrust parallel electric cylinder according to claim 1 in which the other end of the piston rod is connected to a coupling anti-rotation device.
4. A high-thrust parallel electric cylinder according to claim 2, characterized in that the first sensor and the second sensor are respectively arranged at the two ends of the effective stroke of the piston rod, and the housing of the transmission case is provided with bearings which are respectively connected with and support the output shaft and the main shaft.
5. A high-thrust parallel electric cylinder according to claim 1, characterized in that the piston rod wraps the main generating part of the ball screw inside, the periphery of the piston rod is provided with a guide ring of non-metallic friction material to isolate the piston rod from the cylinder barrel, and the gap is filled with grease; the ball screw is a mute screw.
6. A parallel high-thrust electric cylinder according to claim 1, where the piston rod is screwed to the rotation preventing unit and locked by a set screw to prevent its back movement.
7. A high-thrust parallel electric cylinder according to claim 1, characterized in that the upper stroke end of the cylinder barrel is provided with an upper cushion rubber, and the lower stroke end of the cylinder barrel is provided with a lower cushion rubber.
8. A parallel high thrust electric cylinder according to claim 1 in which the cylinder has a front end lubrication means and a rear end lubrication means, the piston rod lubrication means being provided at one end of the piston rod, the oil lubrication means being located between the cylinder and the transmission case.
9. A high thrust parallel electric cylinder according to claim 1, characterised in that a first dust-proof breather is connected to the top of the piston rod and a second dust-proof breather is mounted at one end of the cylinder barrel.
10. A control method of a high-thrust parallel electric cylinder is characterized by comprising the following steps; according to the instruction of the main control computer, the linear motion of the electric cylinder is accurately controlled in a real-time closed-loop manner, acceleration and deceleration, reversing and various position controls are generated, the rotary motion is changed into the linear motion to replace a servo oil pressure cylinder,
electronic jar is furnished with safety arrangement, including overload protection, power-off protection and overtravel protection, the total tertiary of overtravel protection:
the first stage of computer protection, the computer collects the signals of two end sensors of effective stroke to realize automatic termination of movement and weak current automatic protection,
in the second stage, strong current protection is carried out, the electric cylinder passes through the first sensor or the second sensor to trigger the first strong current protection device or the second strong current protection device, so that forced power-off contracting brake protection is realized,
the mechanical protection of the third step is that the upper end and the lower end of the cylinder head of the electric cylinder are both provided with buffer rubber, so that once the electric protection is out of control, the electric cylinder is prevented from being permanently damaged, the operation is safe and reliable,
a lubricating step, namely installing a cylinder barrel and a lubricating device on a piston rod,
a noise reduction step, wherein an oil bearing sliding pair of a noise reduction device is lubricated by grease, a ball screw is lubricated by lubricating grease, and is provided with a corresponding oil filling hole and an oil filling and storing device, a main sounding part screw is wrapped in a piston, a non-metal low-friction material is arranged on the periphery of the piston to isolate the piston from a cylinder barrel, grease is filled in a gap to prevent noise from being transmitted in the motion of the screw,
a dustproof ventilation step, wherein one end of the cylinder barrel is provided with two dustproof ventilation devices, the end part of the piston rod is provided with the dustproof ventilation device when the screw rod runs,
the transmission system adopts a mode that a servo motor is connected with a ball screw in parallel, namely, a motor shaft and the ball screw are connected together through a transmission belt in a transmission box,
in the installation step of the electric cylinder, the piston rod is connected with the connecting anti-rotation device by screw threads and is locked and stopped by a set screw to prevent the screw threads from loosening,
the alternating current servo motor realizes power-off braking, position feedback, self cooling and bearing of the maximum steering force generated by the electric cylinder, and provides servo torque, rotation speed and acceleration for the electric cylinder.
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| CN201910994929.3A CN110686057A (en) | 2019-10-18 | 2019-10-18 | High-thrust parallel electric cylinder and control method |
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| CN201910994929.3A CN110686057A (en) | 2019-10-18 | 2019-10-18 | High-thrust parallel electric cylinder and control method |
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Cited By (1)
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|---|---|---|---|---|
| CN116404803A (en) * | 2023-06-07 | 2023-07-07 | 华侨大学 | Variable-speed variable-torque electric cylinder and engineering machinery thereof |
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