CN107181358B - Electric cylinder system - Google Patents
Electric cylinder system Download PDFInfo
- Publication number
- CN107181358B CN107181358B CN201710500907.8A CN201710500907A CN107181358B CN 107181358 B CN107181358 B CN 107181358B CN 201710500907 A CN201710500907 A CN 201710500907A CN 107181358 B CN107181358 B CN 107181358B
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- CN
- China
- Prior art keywords
- electric cylinder
- screw rod
- cylinder system
- positioning sleeve
- motor
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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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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
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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
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
An electric cylinder system comprising: a DC motor; the motor shaft of the motor passes through the grating chips, and the grating chips and the decoder are used for acquiring the rotation direction and the rotation speed of the motor shaft and transmitting the rotation direction and the rotation speed to the driving system; the speed reducing component comprises a gear set formed by at least two gears, the diameters of the at least two gears are sequentially increased, the motor shaft is fixed on the gear shaft center with the smallest diameter, and threads are arranged at the shaft center of the gear with the largest diameter; the screw rod is in threaded fit with the axis of the gear with the largest diameter; and the protection component is arranged at one end of the screw rod and is used for sending an alarm signal to the driving system when the lead of the screw rod reaches the maximum distance. So that the cost of the electric cylinder system is obviously reduced, the response is faster, the reliability is higher, and the space structure is more compact.
Description
Technical Field
The embodiment of the invention relates to a mechanical transmission control technology, in particular to an electric cylinder system.
Background
The electric cylinder is a modularized product designed by integrating the motor and the screw rod, the rotary motion of the motor is converted into linear motion, and meanwhile, the optimal advantages of the motor are that: accurate rotation speed control, accurate rotation number control and accurate torque control are converted into: accurate speed control, accurate position control and accurate thrust control; electric cylinders are widely used in the field of mechanical control, such as precision machine tools, automotive manufacturing equipment, robots, valve control, and the like.
The existing electric cylinder system mostly adopts a servo driver to drive a servo motor, the servo motor drives an internal screw rod structure, and position detection is carried out through a proximity sensor, a grating ruler, an encoder and the like. The servo driving system is mostly a semi-closed loop system, the numerical control system sends out instructions, the servo driving system receives the instructions and then executes the instructions, in the executing process, the encoder of the servo driving system feeds back the position to the servo driving system, the servo driving system carries out deviation correction by itself, and errors of the servo motor can be avoided.
Although the semi-closed loop structure of the electric cylinder system provided with the servo motor can avoid errors of the electric cylinder, mechanical errors cannot be avoided, the semi-closed loop system is complex in structure, the corresponding response speed is low, and the cost of components adopted by the control system is high.
Disclosure of Invention
The invention provides an electric cylinder system, which is used for realizing the remarkable reduction of the cost, faster response and higher reliability of the electric cylinder system.
The embodiment of the invention provides an electric cylinder system, which comprises:
a DC motor;
the motor shaft of the motor passes through the grating chips, and the grating chips and the decoder are used for acquiring the rotation direction and the rotation speed of the motor shaft and transmitting the rotation direction and the rotation speed to the driving system;
the speed reducing component comprises a gear set formed by at least two gears, the diameters of the at least two gears are sequentially increased, the motor shaft is fixed on the gear shaft center with the smallest diameter, and threads are arranged at the shaft center of the gear with the largest diameter;
the screw rod is in threaded fit with the axis of the gear with the largest diameter;
and the protection component is arranged at one end of the screw rod and is used for sending an alarm signal to the driving system when the lead of the screw rod reaches the maximum distance.
Further, the speed reducing component further comprises a speed reducing box cover, the at least two gears are arranged in the speed reducing box cover, and a gasket is arranged between the gear set and the speed reducing box cover;
further, the motor shaft penetrates through the reduction gearbox cover, and the grating chips and the decoder are fixed on the reduction gearbox cover;
further, the gear set comprises four gears with sequentially increased diameters;
further, the protection member includes:
the positioning sleeve is fixedly arranged at one end of the screw rod;
the anti-rotation bearing is fixed on one side of the positioning sleeve and protrudes out of the positioning sleeve along the radial direction of the positioning sleeve;
the outer shell is internally provided with an inner cavity, the shape of the wall of the inner cavity is matched with that of the positioning sleeve and the stop bearing, the outer shell is provided with an opening corresponding to the maximum distance of the lead of the screw rod, and the opening is arranged corresponding to the stop bearing;
the micro switch is fixed on the inner side of the outer shell body in a matched mode through a fixing screw, a hexagon nut and the opening.
Further, one end of the screw rod is connected with a screw rod nut, and the screw rod nut and the positioning sleeve are fixed through a seam riding screw;
further, the protection member further includes:
and the end cover is arranged at the other end of the outer shell opposite to the inlet and outlet ends of the positioning sleeve.
The invention forms a closed loop feedback system by the direct current motor, the grating chips, the decoder and the micro switch, replaces the traditional servo motor driving system, can solve the problem of mechanical error existing in motor movement, and ensures that the manufacturing cost of the electric cylinder system is obviously reduced and the reliability is higher.
Drawings
Fig. 1 is a mechanical structure diagram of an electric cylinder system in an embodiment of the invention.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Examples
Fig. 1 is a mechanical structure diagram of an electric cylinder system according to a first embodiment of the present invention, which specifically includes the following components:
a DC motor 8;
the grating code chip 1 and the decoder 2, the motor shaft 9 of the motor 8 passes through the grating code chip 1, and the grating code chip 1 and the decoder 2 are used for acquiring the rotation direction and rotation speed information of the motor shaft 9 and transmitting the corresponding information to the driving system.
The speed reducing component comprises a gear set 5 formed by at least two gears, the diameters of the at least two gears are sequentially increased, a motor shaft 9 is fixed on the gear shaft center with the smallest diameter, and threads are arranged on the shaft center of the gear with the largest diameter;
the screw rod 7 is arranged at the axis of the gear with the largest diameter in a threaded fit manner;
and the protection component is arranged at one end of the screw rod 7 and is used for sending an alarm signal to the driving system when the lead of the screw rod 7 reaches the maximum distance.
Specifically, the grating chip 1 is also called an encoder, is a rotary measuring element, is arranged on the motor shaft 9, rotates along with the motor shaft 9, is uniformly provided with 500 small holes at the circumferential edge of the grating chip 1, and can acquire corresponding position information when light is detected to pass through a certain small hole along with the rotation of the grating chip 1, and can convert the measured angular displacement into an incremental pulse or absolute pulse form; the decoder 2 is used in conjunction with the grating chips 1 to parse the resulting signal to the drive system, so that the rotational speed and direction of the motor shaft 9 can be known.
Further, the speed reducing part further comprises a speed reducing box cover 6, at least two gears are arranged in the speed reducing box cover, and a gasket 4 is arranged between the gear set 5 and the speed reducing box cover 6;
in this embodiment, the gear set 5 includes 4 gears with different diameters, the gears are sequentially arranged from top to bottom in order of diameter from small to large, the motor shaft 9 is fixed on the gear shaft center with the smallest diameter, and one end of the screw rod 7 passes through the gear shaft center with the largest diameter. When the motor shaft 9 starts to rotate at a certain speed, the gear with the smallest diameter is driven to start to rotate, and other gears also start to rotate under the rotation of the wheel with the smallest diameter, because the speeds of one circle of rotation of the gears with different diameters are different, the rotation speed with the largest diameter is slowest, and therefore, the function of reducing speed is achieved.
Further, a motor shaft 9 penetrates through the reduction gearbox cover 6, and the grating chips 1 and the decoder 2 are fixed on the reduction gearbox cover 6;
further, the protection member includes:
the locating sleeve 11, the screw nut 19 is connected with the locating sleeve 11;
a rotation stopping bearing 10 fixed on one side of the positioning sleeve 11 and protruding out of the positioning sleeve 11 along the radial direction of the positioning sleeve 11, wherein a gasket 12 is arranged between the rotation stopping bearing 10 and the positioning sleeve 11; the screw rod 7 and the screw rod nut 19 form a piston rod mechanism, the piston rod mechanism adopts a split design of an output rod and a piston ring, and the design in a compact space is realized by combining the flange of the screw rod nut and the bearing rotation stop 10.
Further, the protection member further includes:
an end cover 16 arranged at the other end of the outer shell 15 opposite to the inlet and outlet ends of the positioning sleeve 11;
an inner cavity is formed in the outer shell 15, the shape of the wall of the inner cavity is matched with that of the positioning sleeve 11 and the stop bearing 10, an opening corresponding to the maximum distance of the lead of the screw rod is formed in the outer shell 15, and the opening is arranged corresponding to the stop bearing 10;
the micro switch 18 is fixed on the inner side of the outer shell 15 through the fixing screw 13, the hexagonal nut 14 and the opening hole in a matching way.
Specifically, one end of the screw rod 7 is connected with a screw rod nut 19, and the screw rod nut 19 and the positioning sleeve 11 are fixed through a seam riding screw, so that the effects of fully utilizing space and reducing the volume of the electric cylinder system are achieved;
specifically, the direct current motor 8, the grating chip 1, the decoder 2 and the micro switch 18 form a full-closed loop feedback system, a part or all of the output quantity of the control system is returned to the input end of the system through a certain method and device, feedback information is compared with original input information, and the compared result is applied to the system to control, so that the system is prevented from deviating from a preset target. The specific process is as follows: the decoder 2 reads the position information of the grating chips 1 (which are synchronous with the motor shaft 9) and transmits the real-time position information to the motor drive control board; the motor drive control board gives corresponding instructions to the motor 8 to control the forward rotation, the reverse rotation and the number of turns of the motor 8; the motor 8 drives the screw rod 7 to rotate through a reduction gearbox; the screw rod 7 drives the screw rod nut 19 to move; limiting the movement range of the lead screw nut 19 by a micro switch 18 installed in the outer housing 15; once the micro switch 18 is triggered, the motor is warned in real time to the motor drive control board, and the motor drive control board gives an instruction to the motor 8 to carry out emergency braking; the motor drive control board automatically compensates for the motion error according to the rotation curve characteristic of the motor 8.
According to the technical scheme, a closed loop feedback system is formed by the direct current motor, the grating chips, the decoder and the micro switch, so that the problem of mechanical errors in motor movement is solved, the manufacturing cost of the electric cylinder system is obviously reduced, and the reliability is higher; the compact connection design among the components reduces the volume of the electric cylinder system and enlarges the application range.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (7)
1. An electric cylinder system comprising:
a DC motor;
the motor shaft of the direct current motor passes through the grating chips, and the grating chips and the decoder are used for acquiring the rotation direction and the rotation speed of the motor shaft and transmitting the rotation direction and the rotation speed to a driving system;
the speed reducing component comprises a gear set formed by at least two gears, the diameters of the at least two gears are sequentially increased, the motor shaft is fixed on the gear shaft center with the smallest diameter, and threads are arranged at the shaft center of the gear with the largest diameter;
the screw rod is in threaded fit with the axis of the gear with the largest diameter;
and the protection component is arranged at one end of the screw rod and is used for sending an alarm signal to the driving system when the lead of the screw rod reaches the maximum distance.
2. The electric cylinder system of claim 1, wherein the reduction member further comprises a reduction box cover, the at least two gears being disposed within the reduction box cover, a spacer being disposed between the gear set and the reduction box cover.
3. The electric cylinder system of claim 2 wherein the motor shaft passes through the reduction box cover, the grating chips and the decoder being secured to the reduction box cover.
4. The electric cylinder system of claim 1 wherein the gear set comprises four sequentially larger diameter gears.
5. The electric cylinder system according to claim 1, wherein the protection member includes:
the positioning sleeve is fixedly arranged at one end of the screw rod;
the anti-rotation bearing is fixed on one side of the positioning sleeve and protrudes out of the positioning sleeve along the radial direction of the positioning sleeve;
the outer shell is internally provided with an inner cavity, the shape of the wall of the inner cavity is matched with that of the positioning sleeve and the stop bearing, the outer shell is provided with an opening corresponding to the maximum distance of the lead of the screw rod, and the opening is arranged corresponding to the stop bearing;
the micro switch is fixed on the inner side of the outer shell body in a matched mode through a fixing screw, a hexagon nut and the opening.
6. The electric cylinder system as set forth in claim 5 wherein a screw nut is connected to one end of the screw, the screw nut and the positioning sleeve being secured by a saddle screw.
7. The electric cylinder system according to claim 5, wherein the protection member further includes:
and the end cover is arranged at the other end of the outer shell opposite to the inlet and outlet ends of the positioning sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500907.8A CN107181358B (en) | 2017-06-27 | 2017-06-27 | Electric cylinder system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710500907.8A CN107181358B (en) | 2017-06-27 | 2017-06-27 | Electric cylinder system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107181358A CN107181358A (en) | 2017-09-19 |
| CN107181358B true CN107181358B (en) | 2023-06-23 |
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ID=59844448
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710500907.8A Active CN107181358B (en) | 2017-06-27 | 2017-06-27 | Electric cylinder system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107181358B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6740996B1 (en) * | 2003-03-25 | 2004-05-25 | Curtis Liu | Motor drive with a combination step control |
| CN2809621Y (en) * | 2005-04-08 | 2006-08-23 | 重庆工学院 | Intelligent detection system for bevel gear transmission quality |
| CN101383540A (en) * | 2007-09-05 | 2009-03-11 | 中国科学院自动化研究所 | Completely sealed type servo drive wheel |
| CN101844317A (en) * | 2010-03-25 | 2010-09-29 | 合肥工业大学 | Device and method for correcting transmission error of precise numerical control machine closed loop servo system |
| CN104795958A (en) * | 2014-12-18 | 2015-07-22 | 遨博（北京）智能科技有限公司 | Brushless direct-current servo system provided with hollow shaft motor and applying mechanical arm |
| CN105929485A (en) * | 2016-05-16 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Linear-type continuous adjustable light decay device based on linear motor |
| CN106443850A (en) * | 2016-09-20 | 2017-02-22 | 上海理工大学 | One-dimensional superstructure terahertz CDMA (code division multiple access) system time domain encoder and decoder |
| CN206834922U (en) * | 2017-06-27 | 2018-01-02 | 上海堃捷信息科技有限公司 | A kind of electric cylinders system |
-
2017
- 2017-06-27 CN CN201710500907.8A patent/CN107181358B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6740996B1 (en) * | 2003-03-25 | 2004-05-25 | Curtis Liu | Motor drive with a combination step control |
| CN2809621Y (en) * | 2005-04-08 | 2006-08-23 | 重庆工学院 | Intelligent detection system for bevel gear transmission quality |
| CN101383540A (en) * | 2007-09-05 | 2009-03-11 | 中国科学院自动化研究所 | Completely sealed type servo drive wheel |
| CN101844317A (en) * | 2010-03-25 | 2010-09-29 | 合肥工业大学 | Device and method for correcting transmission error of precise numerical control machine closed loop servo system |
| CN104795958A (en) * | 2014-12-18 | 2015-07-22 | 遨博（北京）智能科技有限公司 | Brushless direct-current servo system provided with hollow shaft motor and applying mechanical arm |
| CN105929485A (en) * | 2016-05-16 | 2016-09-07 | 中国电子科技集团公司第四十研究所 | Linear-type continuous adjustable light decay device based on linear motor |
| CN106443850A (en) * | 2016-09-20 | 2017-02-22 | 上海理工大学 | One-dimensional superstructure terahertz CDMA (code division multiple access) system time domain encoder and decoder |
| CN206834922U (en) * | 2017-06-27 | 2018-01-02 | 上海堃捷信息科技有限公司 | A kind of electric cylinders system |
Non-Patent Citations (2)
| Title |
|---|
| 寿华梁 ; 杨庆华 ; 鲍官军 ; 高峰 ; .轴承卷边机控制***的研究与应用.机电工程.2009,(第10期),全文. * |
| 鲍官军 ; 王志恒 ; 寿华梁 ; 高峰 ; 杨庆华 ; .基于MSP430的轴承卷边机控制***设计.浙江工业大学学报.2009,(第06期),全文. * |
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| Publication number | Publication date |
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| CN107181358A (en) | 2017-09-19 |
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