CN111288135B - Energy-saving piston type thin oil lubrication electric servo actuator - Google Patents
Energy-saving piston type thin oil lubrication electric servo actuator Download PDFInfo
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- CN111288135B CN111288135B CN202010098331.9A CN202010098331A CN111288135B CN 111288135 B CN111288135 B CN 111288135B CN 202010098331 A CN202010098331 A CN 202010098331A CN 111288135 B CN111288135 B CN 111288135B
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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
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0417—Heat exchangers adapted or integrated in the gearing
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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
- F16H57/048—Type of gearings to be lubricated, cooled or heated
- F16H57/0497—Screw mechanisms
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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
- F16H2025/2075—Coaxial drive motors
Abstract
The invention discloses an energy-saving piston type thin oil lubrication electric servo actuator, which comprises a cylinder barrel, a cylinder rod, a servo motor and a lead screw, wherein when the energy-saving piston type thin oil lubrication electric servo actuator moves, the servo motor drives the lead screw to rotate, the lead screw drives the cylinder rod to move up and down, hydraulic oil flows in a rod cavity, a rodless cavity and a cylinder rod inner cavity to play a role in lubrication and heat dissipation in the moving process of the cylinder rod, an isolation piston isolates the rodless cavity from an air cavity, and the energy-saving piston type thin oil lubrication electric servo actuator is used for balancing oil pressure and air pressure in the cylinder barrel in the moving process of the cylinder rod to avoid bubbles generated due to the movement of oil in the oil cavity, and when the cylinder rod moves to the bottommost initial position and stops, a continuous thrust is provided for the isolation piston through the pressure in the air cavity to support a load, so that the starting torque required by the servo motor is reduced.
Description
Technical Field
The invention relates to the technical field of electromechanical actuating mechanisms, in particular to an energy-saving piston type thin oil lubrication electric servo actuator.
Background
The electric servo actuator is an integrated linear actuator obtained by combining a servo motor and a ball screw, and converts the rotary motion of the servo motor into the linear motion of a screw nut and a cylinder rod through the ball screw. By using the servo motor as a power source and combining the high-efficiency transmission of the ball screw, the precise rotating speed control, the revolution control and the torque control of the ball screw are converted into the precise output speed, position and thrust of the electric servo actuator. In view of the advantages of high transmission efficiency, high control precision, long service life, energy conservation, environmental protection and the like, the electric servo actuator is widely applied to the paper making industry, the automobile industry, the electronic industry, the mechanical automation industry, the virtual reality industry and the like. The traditional electric servo actuator mostly adopts a grease lubrication mode, and has the defects of high noise, poor lubrication effect, large heat productivity, complex maintenance and the like.
Disclosure of Invention
The invention aims to provide an energy-saving piston type thin oil lubrication electric servo actuator, which is used for solving the problems in the prior art, adopts hydraulic oil for lubrication, has good lubrication and heat dissipation effects, balances the oil-gas pressure in a cylinder barrel by arranging an air cavity and an isolation piston in the cylinder barrel, avoids bubbles generated in the moving process of a cylinder rod, and can play a remarkable energy-saving effect by the supporting thrust of the isolation piston.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides an energy-saving piston type thin oil lubrication electric servo actuator, which comprises a cylinder barrel, a cylinder rod, a servo motor and a lead screw, wherein the servo motor is arranged at the lower end of the cylinder barrel, the lead screw is positioned in the cylinder barrel, the output end of the servo motor is in transmission connection with the lower end of the lead screw through a connecting structure, the lower end of the cylinder rod extends into the cylinder barrel from the upper end of the cylinder barrel and is in threaded connection with the lead screw through a guide structure, the lead screw is in sealing connection with the inner wall of the cylinder barrel through the guide structure, the lower end of the guide structure is fixedly connected with an isolation piston, the isolation piston is arranged at the outer side of the lead screw, the isolation piston is respectively in sealing connection with the lead screw and the cylinder barrel, the upper end of the cylinder barrel is in sealing connection with the cylinder rod, and a rodless cavity is formed between the lead screw, the guide structure and the isolation piston, the cylinder barrel, a rod cavity is formed between the guide structure and the cylinder rod, a cylinder rod inner cavity is formed between the screw rod, the guide structure and the cylinder rod, an air cavity is formed between the screw rod, the isolation piston and the cylinder barrel, the rod cavity is respectively communicated with the rodless cavity and the cylinder rod inner cavity, hydraulic oil is filled in the rod cavity, the rodless cavity and the cylinder rod inner cavity, air is filled in the air cavity, and the rodless cavity and the air cavity are isolated by the isolation piston.
Preferably, the guide structure comprises a nut and a guide piston which are sleeved on the screw rod from inside to outside, the nut is fixedly connected with the guide piston, the nut is in threaded connection with the screw rod, the outer side of the guide piston is in sealed connection with the inner wall of the cylinder barrel, the lower end of the cylinder rod is fixedly connected with the nut, and the upper end of the isolation piston is fixedly connected with the lower end of the guide piston.
Preferably, the upper end of the cylinder barrel is connected with a cylinder head flange, the cylinder head flange is detachably connected with the cylinder barrel wall of the cylinder barrel, and the cylinder head flange is connected with the cylinder rod in a sealing mode.
Preferably, the lower end of the cylinder barrel is provided with a cylinder bottom, the screw rod is rotatably connected with the cylinder bottom through a bearing, the lower end of the cylinder bottom is provided with a sealing cover, the sealing cover is detachably connected with the cylinder barrel and is in sealing connection with the screw rod, the lower end of the screw rod extends out of the sealing cover and is in transmission connection with the output end of the servo motor, the screw rod is sleeved with a plurality of locking nuts in threaded connection with the screw rod, and the locking nuts are located between the sealing cover and the cylinder bottom.
Preferably, the connecting structure comprises a coupler and a connecting cylinder, one end of the coupler is connected with the output end of the servo motor, the other end of the coupler is connected with the lower end of the screw rod, the connecting cylinder is arranged on the outer side of the coupler, the upper end of the connecting cylinder is detachably connected with the lower end of the cylinder barrel, and the lower end of the connecting cylinder is detachably connected with the servo motor.
Preferably, the upper end of the cylinder rod is fixedly connected with an end head, the upper end of the end head is fixedly connected with a cylinder rod universal joint, the side wall of the end head is provided with an oil filling hole, and the oil filling hole is communicated with the inner cavity of the cylinder rod.
Preferably, the servo motor is arranged in an installation shell, the installation shell comprises a bottom plate, a vertical plate, a side plate and a top plate, the bottom plate is detachably connected with the lower end of the side plate, the top plate is detachably connected with the upper end of the side plate, the vertical plate is fixed on the bottom plate, the lower end of the servo motor is fixed on the vertical plate, the output end of the servo motor penetrates through a through hole in the top plate to be in transmission connection with the lead screw, and the lower end of the bottom plate is fixedly connected with a cylinder universal joint.
Preferably, the lower end of the nut is fixedly connected with a brake ring, and the brake ring is sleeved on the screw rod and is rotationally connected with the screw rod.
Preferably, a guide piston through hole is formed in the guide piston, and the guide piston through hole communicates the rod cavity with the rodless cavity; a cylinder rod through hole is formed in the side wall of the cylinder rod and communicates the rod cavity with the cylinder rod inner cavity; the side wall of the cylinder barrel is provided with a gas through hole, the gas through hole is communicated with the gas cavity, and the gas in the gas cavity is nitrogen.
Compared with the prior art, the invention has the following technical effects:
when the energy-saving piston type thin oil lubrication electric servo actuator moves, the servo motor drives the screw rod to rotate, the screw rod drives the cylinder rod to move up and down, hydraulic oil flows in the rod cavity, the rodless cavity and the cylinder rod inner cavity in the moving process of the cylinder rod to play a role in lubrication and heat dissipation, the rodless cavity is isolated from the air cavity by the isolation piston, the isolation piston is used for balancing oil pressure and air pressure in the cylinder barrel in the moving process of the cylinder rod to avoid bubbles generated due to oil liquid jumping in the oil cavity, and when the cylinder rod moves to the bottommost initial position and stops, a continuous thrust is provided for the isolation piston through the pressure in the air cavity to support a load, so that the starting torque required by the servo motor is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the internal structure of an energy-saving piston-type thin oil lubricated electric servo actuator according to the present invention;
FIG. 2 is a schematic view of a cylinder rod through bore and a pilot piston through bore in the present invention;
wherein: the hydraulic brake comprises a servo motor 1, a cylinder barrel 2, a cylinder rod 3, a lead screw 4, a nut 5, an isolation piston 6, a guide piston 7, a coupling 8, a cylinder barrel universal joint 9, a cylinder rod universal joint 10, an air cavity 11, a rodless cavity 12-1, a rod cavity 12-2, a cylinder rod inner cavity 12-3, an air through hole 13, an oil filling hole 14, a cylinder rod through hole 15, a guide piston through hole 16 and a brake ring 17.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
The invention aims to provide an energy-saving piston type thin oil lubrication electric servo actuator, which is used for solving the problems in the prior art, adopts hydraulic oil for lubrication, has good lubrication and heat dissipation effects, balances the oil-gas pressure in a cylinder barrel by arranging an air cavity and an isolation piston in the cylinder barrel, avoids bubbles generated in the moving process of a cylinder rod, and can play a remarkable energy-saving effect by the supporting thrust of the isolation piston.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1-2: the embodiment provides an energy-saving piston type thin oil lubrication electric servo actuator, in particular to a vertical electric servo actuator, which comprises a cylinder barrel 2, a cylinder rod 3, a servo motor 1 and a lead screw 4, wherein the lead screw 4 is preferably a ball lead screw, the servo motor 1 is arranged at the lower end of the cylinder barrel 2, the lead screw 4 is positioned in the cylinder barrel 2, the output end of the servo motor 1 is in transmission connection with the lower end of the lead screw 4 through a connecting structure, the lower end of the cylinder rod 3 extends into the cylinder barrel 2 from the upper end of the cylinder barrel 2 and is in threaded connection with the lead screw 4 through a guide structure, the lead screw 4 is in sealed connection with the inner wall of the cylinder barrel 2 through a guide structure, the lower end of the guide structure is fixedly connected with an isolation piston 6, the isolation piston 6 is arranged at the outer side of the lead screw 4, the isolation piston 6 is respectively in sealed connection with the lead screw 4 and the cylinder barrel 2, the upper end of the cylinder barrel 2 is in sealed connection with the cylinder rod 3, a rodless cavity 12-1 is formed between the lead screw 4, the guide structure and the isolation piston 6, a rod cavity 12-2 is formed among the cylinder barrel 2, the guide structure and the cylinder rod 3, a cylinder rod inner cavity 12-3 is formed among the lead screw 4, the guide structure and the cylinder rod 3, an air cavity 11 is formed among the lead screw 4, the isolation piston 6 and the cylinder barrel 2, the rod cavity 12-2 is respectively communicated with the rodless cavity 12-1 and the cylinder rod inner cavity 12-3, the rod cavity 12-2, the rodless cavity 12-1 and the cylinder rod inner cavity 12-3 are filled with hydraulic oil, and the air cavity 11 is filled with air. When the energy-saving piston type thin oil lubrication electric servo actuator moves, the servo motor 1 drives the screw rod 4 to rotate, the guide structure converts the rotation of the screw rod 4 into the linear motion along the axial direction of the screw rod 4, and further the cylinder rod 3 moves along the axial direction of the cylinder barrel 2, in the moving process of the cylinder rod 3, hydraulic oil flows in the rod cavity 12-2, the rodless cavity 12-1 and the cylinder rod inner cavity 12-3 to play roles of lubrication and heat dissipation, the rodless cavity 12-1 is isolated from the air cavity 11 by the isolating piston 6, in the moving process of the cylinder rod 3, the cylinder rod 3 is used for balancing the oil pressure and the air pressure in the cylinder barrel 2, so that when the cylinder rod 3 moves to the initial position at the bottommost end and stops due to the fact that air bubbles are generated by oil liquid in an oil cavity, the pressure in the air chamber 11 provides a continuous thrust force to the isolation piston 6 to support the load, so that the starting torque required by the servo motor 1 is reduced.
In this embodiment, guide structure includes screw 5 and guide piston 7 that the cover was established on lead screw 4 from inside to outside, screw 5 and guide piston 7 fixed connection, screw 5 and lead screw 4 threaded connection, and the outside of guide piston 7 is sealed and sliding connection with the inner wall of cylinder 2, and the inboard and the screw 5 fixed connection of the lower extreme of cylinder pole 3 keep apart the upper end of piston 6 and the lower extreme fixed connection of guide piston 7.
In this embodiment, the upper end of the cylinder barrel 2 is connected with a cylinder head flange, the cylinder head flange is detachably connected with the wall of the cylinder barrel 2, and the cylinder head flange is hermetically and slidably connected with the cylinder rod 3.
In this embodiment, the lower extreme of cylinder 2 is provided with the cylinder bottom, lead screw 4 passes through the bearing rotation with the cylinder bottom and is connected, the bearing is preferred two tapered roller bearings that set up side by side, the lower extreme of cylinder bottom is provided with sealed lid, sealed lid can be dismantled with cylinder 2 and be connected and sealed lid and lead screw 4 sealed and rotate and be connected, the lower extreme of lead screw 4 stretches out sealed lid and is connected with servo motor 1's output transmission, the cover is equipped with a plurality of lock nuts with lead screw 4 threaded connection on the lead screw 4, a plurality of lock nuts are located between sealed lid and the cylinder bottom, lock nut is preferred two, lock nut is used for realizing the accent crack and the fastening of lead screw 4 and bearing.
In this embodiment, servo motor 1 sets up in the installation casing, and the installation casing includes bottom plate, riser, curb plate and roof, and the bottom plate passes through the screw thread with the lower extreme of curb plate can dismantle the connection, and the roof can dismantle the connection through the screw thread with the upper end of curb plate, and the riser is fixed on the bottom plate, and servo motor 1's lower extreme is fixed on the riser, and servo motor 1's output passes through the through-hole on the roof and is connected with the transmission of lead screw 4, and the lower extreme fixedly connected with cylinder universal joint 9 of bottom plate.
In this embodiment, connection structure includes shaft coupling 8 and connecting cylinder, and the one end of shaft coupling 8 is connected with servo motor 1's output, and the other end of shaft coupling 8 is connected with lead screw 4's lower extreme, and the connecting cylinder setting can be in the outside of shaft coupling 8, and the upper end and the sealed lid of connecting cylinder can be dismantled and be connected, specifically, the upper portion and the sealed threaded connection of lid of connecting cylinder, and the lower part and the roof of connecting cylinder pass through the bolt and can dismantle and be connected.
In the embodiment, the upper end of the cylinder rod 3 is fixedly connected with an end head, the upper end of the end head is fixedly connected with a cylinder rod universal joint 10, the cylinder barrel universal joint 9 and the cylinder rod universal joint 10 are both used for connecting and fixing the energy-saving piston type thin oil lubrication electric servo actuator with other devices, the side wall of the end head is provided with an oil filling hole 14, and the oil filling hole 14 is communicated with an inner cavity 12-3 of the cylinder rod; a guide piston through hole 16 is formed in the guide piston 7, and the rod cavity 12-2 and the rodless cavity 12-1 are communicated through the guide piston through hole 16; a cylinder rod through hole 15 is formed in the side wall of the cylinder rod 3, and the rod cavity 12-2 is communicated with the cylinder rod inner cavity 12-3 through the cylinder rod through hole 15; hydraulic oil, preferably wear-resistant dilute hydraulic oil, is injected into the cylinder rod inner cavity 12-3 through the oil injection hole 14, and enters the rod cavity 12-2 through the cylinder rod through hole 15 and then enters the rodless cavity 12-1 through the guide piston through hole 16.
In the embodiment, the side wall of the cylinder barrel 2 is provided with a gas through hole 13, the gas through hole 13 is communicated with the gas cavity 11, the gas in the gas cavity 11 is nitrogen, the nitrogen is introduced into the gas cavity 11 through the gas through hole 13, and the pressure of the gas cavity 11, the rodless cavity 12-1, the rod cavity 12-2 and the cylinder rod inner cavity 12-3 is balanced in the motion of the cylinder rod 3. The air pressure in the air chamber 11 is used for providing a continuous thrust force for the isolation piston 6 to support a load, so that the starting torque required by the servo motor 1 is reduced.
In this embodiment, the lower end of the nut 5 is fixedly connected with a brake ring 17, the brake ring 17 is sleeved on the screw rod 4 and is connected with the screw rod 4 in a sealing manner, and the brake ring 17 is used for limiting the lowest position of the movement of the cylinder rod 3 and plays a role in supporting the cylinder rod 3, so that the leakage of nitrogen in the air cavity 11 caused by the overweight load is avoided.
Compared with the existing electric servo actuator, the hydraulic oil lubrication has good lubrication effect, and the noise generated when the cylinder rod 3 moves is low; hydraulic oil can move up and down along with the cylinder rod 3 and flows in the rodless cavity 12-1, the rod cavity 12-2 and the cylinder rod inner cavity 12-3, so that a better heat dissipation effect is achieved; when the cylinder rod 3 moves to the initial position of the bottommost end and stops, the gas in the gas cavity 11 between the isolation piston 6 and the cylinder bottom in the cylinder barrel 2 can provide a continuous thrust for the cylinder rod 3, so that the output torque required when the servo motor 1 is restarted is reduced, the energy-saving effect is achieved, and the installed capacity of the servo motor 1 is reduced; the embodiment has the advantages of simple structure, convenient maintenance, high reliability and wide application prospect.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present 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 (9)
1. The utility model provides an energy-saving piston thin oil lubrication electric servo actuator which characterized in that: the hydraulic cylinder comprises a cylinder barrel, a cylinder rod, a servo motor and a screw rod, wherein the servo motor is arranged at the lower end of the cylinder barrel, the screw rod is positioned in the cylinder barrel, the output end of the servo motor is in transmission connection with the lower end of the screw rod through a connecting structure, the lower end of the cylinder rod extends into the cylinder barrel from the upper end of the cylinder barrel and is in threaded connection with the screw rod through a guide structure, the screw rod is in sealing connection with the inner wall of the cylinder barrel through the guide structure, the lower end of the guide structure is fixedly connected with an isolation piston, the isolation piston is arranged on the outer side of the screw rod, the isolation piston is respectively in sealing connection with the screw rod and the cylinder barrel, the upper end of the cylinder barrel is in sealing connection with the cylinder rod, a rodless cavity is formed among the screw rod, the guide structure and the isolation piston, and a rod cavity is formed among the cylinder barrel, the guide structure and the cylinder rod, a cylinder rod inner cavity is formed among the screw rod, the guide structure and the cylinder rod, an air cavity is formed among the screw rod, the isolation piston and the cylinder barrel, the rod cavity is communicated with the rodless cavity and the cylinder rod inner cavity respectively, hydraulic oil is filled in the rod cavity, the rodless cavity and the cylinder rod inner cavity, air is filled in the air cavity, and the rodless cavity and the air cavity are isolated by the isolation piston.
2. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 1, wherein: the guide structure comprises a nut and a guide piston, the nut and the guide piston are sleeved on the screw rod from inside to outside, the nut is fixedly connected with the guide piston, the nut is in threaded connection with the screw rod, the outer side of the guide piston is in sealed connection with the inner wall of the cylinder barrel, the lower end of the cylinder rod is fixedly connected with the nut, and the upper end of the isolation piston is fixedly connected with the lower end of the guide piston.
3. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 1, wherein: the upper end of the cylinder barrel is connected with a cylinder head flange, the cylinder head flange is detachably connected with the cylinder barrel wall of the cylinder barrel, and the cylinder head flange is connected with the cylinder rod in a sealing mode.
4. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 1, wherein: the lower end of the cylinder barrel is provided with a cylinder bottom, the screw rod is rotatably connected with the cylinder bottom through a bearing, the lower end of the cylinder bottom is provided with a sealing cover, the sealing cover is detachably connected with the cylinder barrel and is in sealing connection with the screw rod, the lower end of the screw rod extends out of the sealing cover and is in transmission connection with the output end of the servo motor, the screw rod is sleeved with a plurality of locking nuts in threaded connection with the screw rod, and the locking nuts are located between the sealing cover and the cylinder bottom.
5. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 1, wherein: the connecting structure comprises a coupler and a connecting cylinder, one end of the coupler is connected with the output end of the servo motor, the other end of the coupler is connected with the lower end of the lead screw, the connecting cylinder is arranged on the outer side of the coupler, the upper end of the connecting cylinder is detachably connected with the lower end of the cylinder barrel, and the lower end of the connecting cylinder is detachably connected with the servo motor.
6. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 1, wherein: the upper end of the cylinder rod is fixedly connected with an end head, the upper end of the end head is fixedly connected with a cylinder rod universal joint, the side wall of the end head is provided with an oil filling hole, and the oil filling hole is communicated with the inner cavity of the cylinder rod.
7. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 1, wherein: the servo motor is arranged in an installation shell, the installation shell comprises a bottom plate, a vertical plate, a side plate and a top plate, the bottom plate is detachably connected with the lower end of the side plate, the top plate is detachably connected with the upper end of the side plate, the vertical plate is fixed on the bottom plate, the lower end of the servo motor is fixed on the vertical plate, the output end of the servo motor penetrates through a through hole in the top plate to be connected with the lead screw in a transmission mode, and the lower end of the bottom plate is fixedly connected with a cylinder barrel universal joint.
8. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 2, wherein: the lower end of the nut is fixedly connected with a brake ring, and the brake ring is sleeved on the lead screw and is rotationally connected with the lead screw.
9. The energy-saving piston type thin oil lubrication electric servo actuator as claimed in claim 2, wherein: a guide piston through hole is formed in the guide piston and communicates the rod cavity with the rodless cavity; a cylinder rod through hole is formed in the side wall of the cylinder rod and communicates the rod cavity with the cylinder rod inner cavity; the side wall of the cylinder barrel is provided with a gas through hole, the gas through hole is communicated with the gas cavity, and the gas in the gas cavity is nitrogen.
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| CN202010098331.9A CN111288135B (en) | 2020-02-18 | 2020-02-18 | Energy-saving piston type thin oil lubrication electric servo actuator |
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| CN202010098331.9A CN111288135B (en) | 2020-02-18 | 2020-02-18 | Energy-saving piston type thin oil lubrication electric servo actuator |
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| CN112211859A (en) * | 2020-09-29 | 2021-01-12 | 燕山大学 | External energy storage hydraulic differential power-assisted electric cylinder |
| NL2032814B1 (en) * | 2022-08-22 | 2024-03-04 | Vdx Innovation Co Ltd | Linear actuator |
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