CN116455131A - Impact-resistant electric cylinder and control method thereof - Google Patents
Impact-resistant electric cylinder and control method thereof Download PDFInfo
- Publication number
- CN116455131A CN116455131A CN202310414603.5A CN202310414603A CN116455131A CN 116455131 A CN116455131 A CN 116455131A CN 202310414603 A CN202310414603 A CN 202310414603A CN 116455131 A CN116455131 A CN 116455131A
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- motor
- electric cylinder
- hydraulic cylinder
- end cover
- piston rod
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 27
- 238000006073 displacement reaction Methods 0.000 claims abstract description 8
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 230000003139 buffering effect Effects 0.000 claims abstract description 6
- 230000035939 shock Effects 0.000 claims 2
- 230000009347 mechanical transmission Effects 0.000 description 3
- 230000010354 integration Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
Classifications
-
- 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
Abstract
The invention provides an impact-resistant electric cylinder, which relates to the field of electric cylinders and comprises a three-cavity hydraulic cylinder with three hydraulic cavities, a bidirectional variable speed servo motor and an electric cylinder shell integrating the three-cavity hydraulic cylinder and the bidirectional variable speed servo motor. The invention controls the steering and the rotating speed of the screw rod by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor so as to control the moving position and the moving speed of the three-cavity hydraulic cylinder in the electric cylinder shell; the load impact of the electric cylinder in the running process is buffered by controlling the pressure and flow in three cavities of the three-cavity hydraulic cylinder; the comprehensive displacement, the speed and the push-pull force of the three-cavity hydraulic cylinder and the extension piston rod can be respectively and simultaneously controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor and controlling the pressure and the flow of the cavity of the three-cavity hydraulic cylinder, so that the motor driving control and the liquid driving buffering are realized.
Description
Technical Field
The invention relates to the technical field of electric cylinders, in particular to an impact-resistant electric cylinder and a control method thereof.
Background
The linear driving mode of the traditional mechanical equipment mainly comprises a linear motor, an electro-hydrostatic actuator and an electric cylinder, wherein the linear motor is difficult to apply to the power driving requirement of large-scale heavy-load equipment due to lower power level; the electro-hydrostatic actuator can meet the high-power driving requirement, but has limited frequency response, and is difficult to adapt to the high-frequency load driving requirement; the electric cylinder has the advantages of high efficiency and high control characteristics, but due to the fact that the transmission machinery of the ball screw is adopted in many cases, strong impact from a load cannot be directly handled, so that the reliability is low and the service life is limited. By comprehensively considering the reasons, the invention adopts the motor driving structure and the liquid driving buffer structure, realizes the novel electric cylinder driving scheme of high-energy-efficiency driving and impact resistance in a combined way, breaks through the principle of pure mechanical transmission configuration of the traditional electric cylinder, integrates the motor driving and the liquid driving together, and simultaneously has the advantages of motor driving and liquid driving buffer.
Disclosure of Invention
The invention discloses an impact-resistant electric cylinder, and aims to improve the technical problems.
The invention adopts the following scheme:
the utility model provides an impact-resistant electric cylinder, includes the three chamber pneumatic cylinder that has three hydraulic pressure cavity, two-way variable speed servo motor and the electric cylinder casing of integration three chamber pneumatic cylinder and two-way variable speed servo motor, three chamber pneumatic cylinder is including stretching out piston rod, upper end cover uide bushing, three chamber cylinder liner, lower end cover nut piston rod and piston, stretch out the piston rod upper end pass upper end cover uide bushing, and its lower extreme with piston fixed connection, upper end cover uide bushing lower extreme with three chamber cylinder liner and lower end cover nut piston rod contact connection, just the lower end cover nut piston rod is located stretch out the inside of piston rod, the piston is located stretch out between piston rod outer wall and the three chamber cylinder liner inner wall; the electric cylinder shell is connected between the three-cavity hydraulic cylinder and the bidirectional variable-speed servo motor; the bidirectional variable-rotation-speed servo motor comprises a motor rotor, a motor shell, a motor upper end cover and a motor lower end cover, wherein the motor shell is fixedly provided with a motor stator, the motor upper end cover is fixedly provided with an upper end bearing, the motor lower end cover is fixedly provided with a lower end bearing, the motor upper end cover and the motor lower end cover are fixedly connected with the motor shell through a motor rotor shaft, the motor upper end cover is arranged at the lower end of the motor cylinder shell, and the motor rotor is fixed in the motor stator through the upper end bearing and the lower end bearing.
As a further improvement, the outside of the electric cylinder shell is fixedly connected with the bidirectional variable speed servo motor through flange connection.
As a further improvement, an air hole for enabling the three-chamber hydraulic cylinder to freely slide therein is arranged inside the electric cylinder housing.
As a further improvement, a friction pair is arranged on the outer wall of the three-cavity hydraulic cylinder.
As a further development, a screw is included, which is connected to the motor rotor in a drive manner and is inserted coaxially with the motor rotor shaft into the electric cylinder housing.
As a further improvement, a ball nut structure is arranged inside the lower end cover nut piston rod, the ball nut structure is matched with the screw rod to form a ball screw nut pair, and the screw rod extends into a hollow gap of the lower end cover nut piston rod and is configured to drive the ball nut and the three-cavity hydraulic cylinder to move in the electric cylinder shell under the rotation of the motor rotor.
As a further improvement, the three-cavity hydraulic cylinder further comprises a fastening nut, and the piston is fixedly connected with the extending piston rod through the fastening nut.
The control method based on the impact-resistant electric cylinder comprises the following steps:
the steering and the rotating speed of the screw rod are controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor so as to control the moving position and the moving speed of the three-cavity hydraulic cylinder in the electric cylinder shell;
the load impact of the electric cylinder in the running process is buffered by controlling the pressure and flow in three cavities of the three-cavity hydraulic cylinder;
the comprehensive displacement, the speed and the push-pull force of the three-cavity hydraulic cylinder and the extension piston rod can be respectively and simultaneously controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor and controlling the pressure and the flow of the cavity of the three-cavity hydraulic cylinder, so that the motor driving control and the liquid driving buffering are realized.
By adopting the technical scheme, the invention can obtain the following technical effects:
according to the impact-resistant electric cylinder, the electric cylinder shell is arranged between the three-cavity hydraulic cylinder and the bidirectional variable-speed servo motor, so that when the electric cylinder is in drive control, the steering and the rotating speed of the screw rod can be controlled by controlling the steering and the rotating speed of the bidirectional variable-speed servo motor, and the position and the speed of the movement of the three-cavity hydraulic cylinder in the electric cylinder shell are controlled; the load impact of the electric cylinder in the running process is buffered by controlling the pressure and flow in three cavities of the three-cavity hydraulic cylinder; the comprehensive displacement, the speed and the push-pull force of the three-cavity hydraulic cylinder and the extension piston rod can be respectively and simultaneously controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor and controlling the pressure and the flow of the cavity of the three-cavity hydraulic cylinder, so that the motor driving control and the liquid driving buffering are realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of the internal structure of an impact-resistant electric cylinder of the present invention.
The attached drawings are used for identifying and describing:
1. extending the piston rod; 2. an upper end cover guide sleeve; 3. a three-cavity cylinder sleeve; 4. an electric cylinder housing; 5. a lower end cap nut piston rod; 6. a piston; 7. a fastening nut; 8. an upper end cover of the motor; 9. an upper end bearing; 10. a motor rotor; 11. a motor stator; 12. a motor housing; 13. a lower end bearing; 14. and a motor lower end cover.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
Examples
The first embodiment of the invention provides an impact-resistant electric cylinder, which comprises a three-cavity hydraulic cylinder with three hydraulic cavities, a bidirectional variable-rotation-speed servo motor, an electric cylinder shell 4 integrating the three-cavity hydraulic cylinder and the bidirectional variable-rotation-speed servo motor, wherein the three-cavity hydraulic cylinder comprises an extension piston rod 1, an upper end cover guide sleeve 2, a three-cavity cylinder sleeve 3, a lower end cover nut piston rod 5, a piston 6 and a fastening nut 7, the upper end of the extension piston rod 1 passes through the upper end cover guide sleeve 2, the lower end of the extension piston rod passes through the upper end cover guide sleeve 2 and is fixedly connected with the piston 6, and the piston 6 is fixedly connected with the extension piston rod 1 through the fastening nut 7; the lower end of the upper end cover guide sleeve 2 is in contact connection with the three-cavity cylinder sleeve 3 and the lower end cover nut piston rod 5, the lower end cover nut piston rod 5 is positioned in the piston rod 1, and the piston 6 is positioned between the outer wall of the piston rod 1 and the inner wall of the three-cavity cylinder sleeve 3. The electric cylinder shell 4 is connected between the three-cavity hydraulic cylinder and the bidirectional variable-speed servo motor, is a key of integrated motor driving and hydraulic driving, and can realize that the three-cavity hydraulic cylinder part and the bidirectional variable-speed servo motor part form a compact and inseparable precise fit whole. The air hole structure is arranged inside the electric cylinder shell 4, so that the three-cavity hydraulic cylinder part can slide freely inside the electric cylinder shell, and meanwhile, the outer part of the electric cylinder shell 4 can be fixedly connected with the bidirectional variable speed servo motor part through flange connection.
Further, the bi-directional variable speed servo motor comprises a motor rotor 10, a motor housing 12 fixed with a motor stator 11, a motor upper end cover 8 fixed with an upper end bearing 9 and a motor lower end cover 14 fixed with a lower end bearing 13, wherein the motor upper end cover 8 is arranged at the lower end of the electric cylinder housing 4, and the motor rotor 10 is fixed in the motor stator 11 through the upper end bearing 9 and the lower end bearing 13 and can rotate freely. The motor upper end cover 8 and the motor lower end cover 14 are fixedly connected with the motor shell 12 through the motor rotor 10 shaft, and form a complete bidirectional variable-rotation-speed servo motor part together with the motor stator 11 and the motor rotor 10 in the motor shell 12.
In another embodiment, a screw is included, which is in driving connection with the motor rotor 10 and is inserted coaxially with the motor rotor 10 shaft into the electric cylinder housing 4. And the ball nut structure is arranged inside the lower end cover nut piston rod 5, the ball nut structure is matched with the screw rod to form a ball screw nut pair, and the screw rod can extend into a hollow gap of the lower end cover nut piston rod 5 and is configured to drive the ball nut and the three-cavity hydraulic cylinder to move in the electric cylinder shell 4 under the rotation of the motor rotor 10.
The impact-resistant electric cylinder provided by the invention is provided with the mechanical transmission structure for driving the ball nut and the three-cavity hydraulic cylinder to move through the motor driving screw rod and the hydraulic structure for realizing buffering through hydraulic driving, and can perform mechanical transmission and hydraulic driving compound control when in operation, cooperatively control the displacement and the speed of the extending piston rod 1, and greatly improve the impact resistance of the electric cylinder. The impact-resistant electric cylinder is of an integrated structure, compact in structure, has a larger stroke and extremely high speed, is quick in response and impact-resistant, and can be widely applied to the fields of industrial production and mechanical engineering.
Further, the bidirectional variable-rotation-speed servo motor part is integrated in the electric cylinder shell 4 and can freely rotate by means of the motor rotor 10 shaft, the three-cavity hydraulic cylinder is also integrated in the electric cylinder shell 4 and can freely slide in the electric cylinder shell 4 by means of a friction pair arranged on the outer wall of the three-cavity hydraulic cylinder, the motor rotor 10 shaft penetrates through the electric cylinder shell 4 and is connected with a screw rod into a whole body, the ball nut and the three-cavity hydraulic cylinder can be driven to move, and the three parts are communicated to form a whole body. The steering and the rotating speed of the screw rod can be controlled through the forward/reverse rotation and the rotating speed of the driving motor so as to control the displacement and the speed of the ball nut and the three-cavity hydraulic cylinder in the electric cylinder shell 4; the load impact received by the electric cylinder can be buffered by controlling the pressure of three cavities of the three-cavity hydraulic cylinder; simultaneously, the rotation speed and the rotation direction of the motor are controlled, the pressure of each cavity of the three-cavity hydraulic cylinder can cooperatively control the displacement and the speed of the three-cavity hydraulic cylinder and the extension piston rod 1, and the impact-resistant function is realized.
The second embodiment of the invention provides a control method based on the impact-resistant electric cylinder, which comprises the following steps: when in drive control, the steering and the rotating speed of the screw rod can be controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor so as to control the moving position and the moving speed of the three-cavity hydraulic cylinder in the electric cylinder shell 4; meanwhile, load impact of the electric cylinder in the running process can be buffered by controlling the pressure and flow in three cavities of the three-cavity hydraulic cylinder. The comprehensive displacement, the speed and the push-pull force of the three-cavity hydraulic cylinder and the extension piston rod 1 can be respectively and simultaneously controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor and controlling the pressure and the flow of the cavity of the three-cavity hydraulic cylinder, so that the motor driving control and the liquid driving buffering are realized. Meanwhile, the invention has high integration level and is convenient for the installation and use of equipment.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention.
Claims (8)
1. The shock-resistant electric cylinder is characterized by comprising a three-cavity hydraulic cylinder with three hydraulic cavities, a bidirectional variable speed servo motor and an electric cylinder shell integrating the three-cavity hydraulic cylinder and the bidirectional variable speed servo motor, wherein the three-cavity hydraulic cylinder comprises an extended piston rod, an upper end cover guide sleeve, a three-cavity cylinder sleeve, a lower end cover nut piston rod and a piston, the upper end of the extended piston rod penetrates through the upper end cover guide sleeve, the lower end of the extended piston rod is fixedly connected with the piston, the lower end of the upper end cover guide sleeve is in contact connection with the three-cavity cylinder sleeve and the lower end cover nut piston rod, the lower end cover nut piston rod is positioned in the extended piston rod, and the piston is positioned between the outer wall of the extended piston rod and the inner wall of the three-cavity cylinder sleeve; the electric cylinder shell is connected between the three-cavity hydraulic cylinder and the bidirectional variable-speed servo motor; the bidirectional variable-rotation-speed servo motor comprises a motor rotor, a motor shell, a motor upper end cover and a motor lower end cover, wherein the motor shell is fixedly provided with a motor stator, the motor upper end cover is fixedly provided with an upper end bearing, the motor lower end cover is fixedly provided with a lower end bearing, the motor upper end cover and the motor lower end cover are fixedly connected with the motor shell through a motor rotor shaft, the motor upper end cover is arranged at the lower end of the motor cylinder shell, and the motor rotor is fixed in the motor stator through the upper end bearing and the lower end bearing.
2. The impact resistant electric cylinder of claim 1, wherein the electric cylinder housing is fixedly connected with the bi-directional variable speed servo motor by a flanged connection.
3. The impact resistant electric cylinder according to claim 1, wherein an air hole for a three-chamber hydraulic cylinder to be freely slidable therein is arranged inside the electric cylinder housing.
4. A shock resistant electric cylinder as claimed in claim 3, wherein a friction pair is mounted on the outer wall of the three-chamber hydraulic cylinder.
5. The impact resistant electric cylinder of claim 1, including a lead screw drivingly connected to said motor rotor and coaxially inserted into said electric cylinder housing with a motor rotor shaft.
6. The impact resistant electric cylinder of claim 5, wherein a ball nut structure is disposed inside the lower end cap nut piston rod, the ball nut structure cooperates with the screw rod to form a ball screw nut pair, and the screw rod extends into the hollow gap of the lower end cap nut piston rod and is configured to drive the ball nut and the three-chamber hydraulic cylinder to move in the electric cylinder housing under the rotation of the motor rotor.
7. The impact resistant electric cylinder of claim 1 wherein said three-chamber hydraulic cylinder further comprises a fastening nut, said piston being fixedly connected to said extended piston rod by said fastening nut.
8. A control method based on the impact-resistant electric cylinder according to any one of claims 1 to 7, characterized by comprising:
the steering and the rotating speed of the screw rod are controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor so as to control the moving position and the moving speed of the three-cavity hydraulic cylinder in the electric cylinder shell;
the load impact of the electric cylinder in the running process is buffered by controlling the pressure and flow in three cavities of the three-cavity hydraulic cylinder;
the comprehensive displacement, the speed and the push-pull force of the three-cavity hydraulic cylinder and the extension piston rod can be respectively and simultaneously controlled by controlling the steering and the rotating speed of the bidirectional variable-rotating-speed servo motor and controlling the pressure and the flow of the cavity of the three-cavity hydraulic cylinder, so that the motor driving control and the liquid driving buffering are realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310414603.5A CN116455131A (en) | 2023-04-18 | 2023-04-18 | Impact-resistant electric cylinder and control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310414603.5A CN116455131A (en) | 2023-04-18 | 2023-04-18 | Impact-resistant electric cylinder and control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116455131A true CN116455131A (en) | 2023-07-18 |
Family
ID=87121599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310414603.5A Pending CN116455131A (en) | 2023-04-18 | 2023-04-18 | Impact-resistant electric cylinder and control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116455131A (en) |
-
2023
- 2023-04-18 CN CN202310414603.5A patent/CN116455131A/en active Pending
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