CN105429352A - Electric linear actuator with sealed lubrication and overload protection structure - Google Patents
Electric linear actuator with sealed lubrication and overload protection structure Download PDFInfo
- Publication number
- CN105429352A CN105429352A CN201510938269.9A CN201510938269A CN105429352A CN 105429352 A CN105429352 A CN 105429352A CN 201510938269 A CN201510938269 A CN 201510938269A CN 105429352 A CN105429352 A CN 105429352A
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- CN
- China
- Prior art keywords
- sliding sleeve
- bearing
- electric cylinder
- pressure sensor
- protection structure
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transmission Devices (AREA)
- Rolling Contact Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention discloses an electric linear actuator with a sealed lubrication and overload protection structure. The electric linear actuator comprises a motor, a sliding sleeve, a screw mechanism, a ripple expansion pipe, a pull-pressure sensor and a controller, which are in electrical connection. A support device of the electric linear actuator is arranged in the front end of the sliding sleeve; the support device is simple in structure, small in size and light in weight; the manufacturing cost of an electric cylinder can be greatly reduced; a screw is sealed through the ripple expansion pipe; and the problem that the screw is corroded and damaged due to the contact of moisture and the screw can be solved. The pull-pressure sensor is arranged at the end part of the sliding sleeve; and when an object driven by the electric cylinder in the working process is blocked to increase a load of the electric cylinder and the pull-pressure sensor detects that the load of the electric cylinder is increased to an ultimate load, the controller controls the motor to stop working, so that the electric linear actuator can play an overload protection role in the electric cylinder; overload damage is avoided; and the lifetime of the electric cylinder is prolonged.
Description
Technical field
The present invention relates to a kind of drive unit, particularly a kind of electric cylinder.
Background technology
Electric cylinder is the drive unit of rectilinear motion with driven by motor screw mechanism (as sliding screw, ball-screw) by convert rotational motion.The structure of electric cylinder comprises the supporting structure of motor, decelerator, screw mechanism, sliding sleeve and supporting sliding sleeve.
Existing supporting structure comprise be connected with reducer shell support column, be fixed on support column front end and the screw rod of the guide holder be slidably matched with sliding sleeve and fixed guide seat.The parts of supporting structure are more, complex structure, and volume is large, and manufacturing cost is higher.
And the hermetically-sealed construction of existing electric cylinder is poor, air easily directly enters in sliding sleeve and screw mechanism is directly contacted with air, and the easy corrosion screw thread pair of the aqueous vapor in air, causes screw mechanism to damage; And screw mechanism lacks lubrication, the easy wear damage of screw mechanism.
And existing electric cylinder does not have limiting force defencive function, when clamping stagnation appears in the object that electric cylinder promotes, motor there will be the problem of overlond running, and then easily causes electric cylinder to damage.
Summary of the invention
In view of this, the object of this invention is to provide a kind of electric linear driver with seal lubrication and overcurrent protection structure, with the technical problem of the easy corrosion of the screw mechanism solving existing electric cylinder, wear damage; And solution electric cylinder lacks the technical problem of overload protection.
The electric linear driver of band seal lubrication of the present invention and overcurrent protection structure, comprise motor, sliding sleeve, promote the screw mechanism of sliding sleeve straight reciprocating motion, connect the decelerator of motor and screw mechanism, and the supporting arrangement of supporting sliding sleeve, described supporting arrangement comprises the support column be enclosed within outside screw mechanism, one end of described support column is fixed on the housing of decelerator, the other end of described support column is provided with guided bearing, described guided bearing comprises the bearing pedestal be fixed in the pore of support column front end and the sliding bearing be fixed in bearing pedestal, described sliding bearing coordinates with sliding sleeve linear slide,
The thread bush that described screw mechanism comprises screw mandrel and coordinates with screw mandrel, the end of described sliding sleeve is fixedly connected with thread bush;
Described electric cylinder also comprises the bellows that one end is connected with support column end part seal, the other end is connected with thread bush end part seal;
Described electric cylinder also comprises the pull pressure sensor being connected to sliding sleeve front end and the controller controlling motor, and described pull pressure sensor and controller electrical connection, described pull pressure sensor is also connected with piecing devices.
Further, lubricating grease is provided with in described sliding sleeve.
Further, described piecing devices comprise the universal joint be connected with pull pressure sensor and the bearing be connected with universal joint.
Further, described sliding bearing is graphite bearing.
Beneficial effect of the present invention:
1, the electric linear driver of band seal lubrication of the present invention and overcurrent protection structure, the front end that its supporting arrangement is arranged on sliding sleeve is inner, and the structure of supporting arrangement is simple, and volume is little, lightweight, the manufacturing cost of reduction electric cylinder that can be very large.
2, the electric linear driver of band seal lubrication of the present invention and overcurrent protection structure, it is sealed screw mandrel by bellows, and aqueous vapor can be avoided with screw mandrel to contact the problem causing screw mandrel corrosion to damage.
3, the electric linear driver of band seal lubrication of the present invention and overcurrent protection structure; it is by arranging pull pressure sensor in sliding sleeve end; there is clamping stagnation in the object driven when electric cylinder in the course of work; when electric cylinder load is increased; when pull pressure sensor detects that the load of electric cylinder increases to its limit load, controller just controls motor stall, thus can play the effect of overload protection to electric cylinder; avoid overload to damage, be conducive to the life-span extending electric cylinder.
Accompanying drawing explanation
Fig. 1 is the perspective view of the electric linear driver of the present embodiment band seal lubrication and overcurrent protection structure;
Fig. 2 is the sectional perspective structural representation of the electric linear driver of the present embodiment band seal lubrication and overcurrent protection structure;
Fig. 3 is the broken section structural representation of the electric linear driver of the present embodiment band seal lubrication and overcurrent protection structure.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in the figure, the electric linear driver of the present embodiment band seal lubrication and overcurrent protection structure, comprise motor 1, sliding sleeve 2, promote the screw mechanism of sliding sleeve straight reciprocating motion, connect the decelerator 3 of motor and screw mechanism, and the supporting arrangement of supporting sliding sleeve, described supporting arrangement comprises the support column 4 be enclosed within outside screw mechanism, one end of described support column is fixed on the housing of decelerator, the other end of described support column is provided with guided bearing 5, described guided bearing comprises the bearing pedestal 51 be fixed in the pore of support column front end and the sliding bearing 52 be fixed in bearing pedestal, described sliding bearing coordinates with sliding sleeve linear slide,
The thread bush 7 that described screw mechanism comprises screw mandrel 6 and coordinates with screw mandrel, the end of described sliding sleeve is fixedly connected with thread bush;
Described electric cylinder also comprises the bellows 8 that one end is connected with support column end part seal, the other end is connected with thread bush end part seal;
Described electric cylinder also comprises the pull pressure sensor 9 being connected to sliding sleeve front end and the controller 10 controlling motor, and described pull pressure sensor and controller electrical connection, described pull pressure sensor is also connected with piecing devices 11.
The electric linear driver of the present embodiment band seal lubrication and overcurrent protection structure, the front end that its supporting arrangement is arranged on sliding sleeve is inner, and the structure of supporting arrangement is simple, and volume is little, lightweight, the manufacturing cost of reduction electric cylinder that can be very large.
And the electric linear driver of the present embodiment band seal lubrication and overcurrent protection structure, it is sealed screw mandrel by bellows, and aqueous vapor can be avoided with screw mandrel to contact the problem causing screw mandrel corrosion to damage.
And the electric linear driver of the present embodiment band seal lubrication and overcurrent protection structure; it is by arranging pull pressure sensor in sliding sleeve end; there is clamping stagnation in the object driven when electric cylinder in the course of work; when electric cylinder load is increased; when pull pressure sensor detects that the load of electric cylinder increases to its limit load, controller just controls motor stall, thus can play the effect of overload protection to electric cylinder; avoid overload to damage, be conducive to the life-span extending electric cylinder.
As the improvement to the present embodiment, be provided with lubricating grease 12 in described sliding sleeve, by lubricating grease, screw mechanism lubricated, the fretting wear of screw thread pair can be reduced, extend the life-span of electric cylinder.
Described piecing devices comprise the universal joint 111 be connected with pull pressure sensor and the bearing 112 be connected with universal joint, bearing is connected with universal joint, make the installation site adjustable range of bearing large, and then make this electric cylinder installation better adaptability in actual applications.
As the improvement to the present embodiment, described sliding bearing is graphite bearing, and graphite bearing has the features such as self-lubricating, high temperature resistant, corrosion-resistant, light weight, and make the weight of supporting structure lighter, the life-span is longer.
What finally illustrate is, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (4)
1. the electric linear driver with seal lubrication and overcurrent protection structure, comprise motor, sliding sleeve, promote the screw mechanism of sliding sleeve straight reciprocating motion, connect the decelerator of motor and screw mechanism, and the supporting arrangement of supporting sliding sleeve, it is characterized in that: described supporting arrangement comprises the support column be enclosed within outside screw mechanism, one end of described support column is fixed on the housing of decelerator, the other end of described support column is provided with guided bearing, described guided bearing comprises the bearing pedestal be fixed in the pore of support column front end and the sliding bearing be fixed in bearing pedestal, described sliding bearing coordinates with sliding sleeve linear slide,
The thread bush that described screw mechanism comprises screw mandrel and coordinates with screw mandrel, the end of described sliding sleeve is fixedly connected with thread bush;
Described electric cylinder also comprises the bellows that one end is connected with support column end part seal, the other end is connected with thread bush end part seal;
Described electric cylinder also comprises the pull pressure sensor being connected to sliding sleeve front end and the controller controlling motor, and described pull pressure sensor and controller electrical connection, described pull pressure sensor is also connected with piecing devices.
2. the electric linear driver of band seal lubrication according to claim 1 and overcurrent protection structure, is characterized in that: be provided with lubricating grease in described sliding sleeve.
3. the electric linear driver of band seal lubrication according to claim 1 and overcurrent protection structure, is characterized in that: described piecing devices comprise the universal joint be connected with pull pressure sensor and the bearing be connected with universal joint.
4. the electric linear driver of band seal lubrication according to claim 1 and overcurrent protection structure, is characterized in that: described sliding bearing is graphite bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938269.9A CN105429352A (en) | 2015-12-14 | 2015-12-14 | Electric linear actuator with sealed lubrication and overload protection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510938269.9A CN105429352A (en) | 2015-12-14 | 2015-12-14 | Electric linear actuator with sealed lubrication and overload protection structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105429352A true CN105429352A (en) | 2016-03-23 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510938269.9A Pending CN105429352A (en) | 2015-12-14 | 2015-12-14 | Electric linear actuator with sealed lubrication and overload protection structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105429352A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386784A (en) * | 2018-03-16 | 2018-08-10 | 李启同 | A kind of liftable heat radiating type gardens LED street lamp |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4712441A (en) * | 1985-05-13 | 1987-12-15 | Brunswick Valve & Control, Inc. | Position controlled linear actuator |
| CN200980019Y (en) * | 2006-10-18 | 2007-11-21 | 重庆海通机械制造有限公司 | An electrically driven cylinder controlled and served by the straight movement of a piston rod |
| CN101441477A (en) * | 2007-11-19 | 2009-05-27 | 北京航空航天大学 | Bending combined two-dimension time-varying load loading unit |
| CN101498372A (en) * | 2009-02-26 | 2009-08-05 | 上海交通大学 | Completely sealing electric cylinder using bellow and sealing method |
| CN202718952U (en) * | 2012-06-17 | 2013-02-06 | 福建省龙岩盛通液压有限公司 | Dustproof hydraulic oil cylinder |
| CN204304692U (en) * | 2015-01-22 | 2015-04-29 | 温州纳米克自动化科技有限公司 | half-sealed electric cylinder |
| CN205195489U (en) * | 2015-12-14 | 2016-04-27 | 重庆东登科技有限公司 | Electronic jar of sealed lubrication in area and overload protection structure |
-
2015
- 2015-12-14 CN CN201510938269.9A patent/CN105429352A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4712441A (en) * | 1985-05-13 | 1987-12-15 | Brunswick Valve & Control, Inc. | Position controlled linear actuator |
| CN200980019Y (en) * | 2006-10-18 | 2007-11-21 | 重庆海通机械制造有限公司 | An electrically driven cylinder controlled and served by the straight movement of a piston rod |
| CN101441477A (en) * | 2007-11-19 | 2009-05-27 | 北京航空航天大学 | Bending combined two-dimension time-varying load loading unit |
| CN101498372A (en) * | 2009-02-26 | 2009-08-05 | 上海交通大学 | Completely sealing electric cylinder using bellow and sealing method |
| CN202718952U (en) * | 2012-06-17 | 2013-02-06 | 福建省龙岩盛通液压有限公司 | Dustproof hydraulic oil cylinder |
| CN204304692U (en) * | 2015-01-22 | 2015-04-29 | 温州纳米克自动化科技有限公司 | half-sealed electric cylinder |
| CN205195489U (en) * | 2015-12-14 | 2016-04-27 | 重庆东登科技有限公司 | Electronic jar of sealed lubrication in area and overload protection structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108386784A (en) * | 2018-03-16 | 2018-08-10 | 李启同 | A kind of liftable heat radiating type gardens LED street lamp |
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Application publication date: 20160323 |
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