CN1590806A - Linear actuator having bidirection self locking - Google Patents
Linear actuator having bidirection self locking Download PDFInfo
- Publication number
- CN1590806A CN1590806A CN 03156227 CN03156227A CN1590806A CN 1590806 A CN1590806 A CN 1590806A CN 03156227 CN03156227 CN 03156227 CN 03156227 A CN03156227 A CN 03156227A CN 1590806 A CN1590806 A CN 1590806A
- Authority
- CN
- China
- Prior art keywords
- self
- locking
- locking spring
- transmission
- linear actuators
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Transmission Devices (AREA)
Abstract
A linear actuator with bidirectional self-locking function, that is, when the output of power unit is stopped, the linear actuator and its load are locked at the current position by the linear actuator itself no matter when the load is pushed or pulled, is disclosed. Its selflocking unit is based on the interaction between self-locking spring, driver and actuator.
Description
Technical field
The present invention relates to a kind of linear actuators of tool bidirectional self-locking, linear actuators is to be used for the reciprocating equipment that any work stretches out or regains; And self-locking mechanism of the present invention can pin the actuating mechanism of linear actuators when the motor of linear actuators stops automatically, causes load can not slide and stable position when being parked in motor and stopping.
Background technique
General linear actuators mainly is made up of institutes such as body, motor, force-output shaft and transmission shafts; At first motor reaches rotary torsion on the force-output shaft by scroll bar drives turbine, then because of force-output shaft and transmission shaft axially to engage, so the rotary torsion of force-output shaft can be passed on the transmission shaft, and transmission shaft is provided with screw axis, is connected to pipe in the load on nut and the nut and be sheathed with on the screw axis; When screw axis rotated with transmission shaft, nut converted the rotating force of screw axis the thrust or the pulling force of a linearity to, made the to-and-fro motion that pipe in the load does to stretch out or regain and drove the working substance start to reach linear activated purpose.
When the conventional linear actuator designed self-locking mechanism as if nothing, this actuator locking was the purpose that reaches locking by inter-agency friction, and the shortcoming of inter-agency friction is to have reduced the speed of linear actuators normal operation and can increase motor load.In addition, be provided with the linear actuators of self-locking mechanism, its self-locking mechanism is to pin transmission shaft when motor stops, and makes the unlikely slip of load and be parked in motor the position when stopping; For example patent EP0662573 is wrapped in a helical spring outward on the transmission shaft external diameter, spring one end then is fixed on the body, when its self-locking mode promotes load for driving transmission shaft when motor running, helical spring is the situation of unclamping in this torsion direction, so helical spring is equivalent to not exist the effect that also do not have; But when motor stopped, transmission shaft can be promoted counterrotating by load because of gravity, and this moment, helical spring was the situation of locking in this torsion direction, so the transmission shaft pinning is reached the purpose of self-locking.The shortcoming of this kind self-locking mode is to have only the unidirectional self-lock function, and if motor will reverse when load regained, the torsion of motor just must can be regained load greater than helical spring self-locking torsion, so also causes the extra load of motor.
Summary of the invention
The present invention seeks at the linear actuators that a kind of tool bidirectional self-locking is provided, the design of its self-locking mechanism has the function of bidirectional self-locking, make power plant no matter under the clockwise and anticlockwise start, stop Shi Jieke and reach and pin function voluntarily, and power plant can not produce extra load yet.
For achieving the above object, the technical solution used in the present invention is as follows: a kind of linear actuators of tool bidirectional self-locking, and it mainly comprises: power plant are the power source of output rotary torsion; One transmission device comprises two transmission engagement portions, the transfer mechanism of above-mentioned power plant output rotary torsion; One activates device, comprises to activate connecting part, screw axis and nut, and this actuatings connecting part and above-mentioned transmission engagement portion socket-connect, and converts the output rotary torsion of above-mentioned transmission device to linear motion and drives load to make linearity mobile; An and self-locking mechanism, cooperatively interact to produce the mechanism of bidirectional self-locking effect by a self-locking spring and above-mentioned transmission device and actuator, above-mentioned self-locking spring is arranged at outside the above-mentioned transmission engagement portion and the two ends of self-locking spring respectively have a folding to collude, and outside self-locking spring, overlap again and unify the bushing pipe that inwall has the oil groove design, make the design of self-locking mechanism have the function of bidirectional self-locking, and power plant can not produce extra load yet.
Power plant output rotary torsion is passed to actuator by transmission device makes the linear actuators start, self-locking device wherein of the present invention is cooperatively interacted to produce the mechanism of bidirectional self-locking effect by a self-locking spring and transmission device and actuator, when making power plant stop to export rotary torsion, the automatic pinning of the actuating mechanism of linear actuators can be made the unlikely slip of load.
For achieving the above object, it promptly is to utilize transmission device, actuator and self-locking mechanism interaction effect that the present invention uses frictional force and superimposed design one, to reach the function of bidirectional self-locking.At first become the shaft coupling mode to cooperate with detent designs transmission device, transmission device constitutes actuator by at least two transmission engagement portions and then is provided with the structure that cooperates with the transmission engagement portion, makes it can drive and transmit torsion mutually; Then the self-locking spring of self-locking mechanism is arranged at transmission device and the actuator part that cooperatively interacts; When driving transmission device and actuator when the dynamic output of power plant load being promoted, self-locking spring is also driven simultaneously and is rotated; But when power plant stop outputting power in arbitrary position, this transmission device promptly becomes unpowered state, this moment, actuator can be reversed by the gravity effect of load by drive, but the self-locking spring external diameter can expand outwardly the self-locking with outer wall generation surface friction drag in the actuator counter-rotating.On the other hand, when power plant when the outputting power desire drives load once more, transmission device is dynamic and drive self-locking spring and inwardly rotate the contraction external diameter, with produce the release effect and with transmission device with rotation, so can not make power plant generation extra load; Therefore can reach the purpose of bidirectional self-locking.
Comprehensively above-mentioned, the start that self-locking mechanism of the present invention design can be used power transmission direction control linear actuators whether, that is no matter power is output as clockwise or rotates counterclockwise, as long as transmission of power direction system reaches transmission device by power plant and reaches actuator again, then not start of self-locking mechanism and linear actuators can normally be released or regain; Otherwise the transmission of power direction is if produced and desire drives actuator rotation (no matter clockwise or rotate counterclockwise) by load gravity, and then the self-locking mechanism start is pinned actuator linear actuators can't be moved.
For further understanding feature of the present invention and technology contents, reference is following about embodiments of the present invention and graphic in detail, however appended graphic only for reference and explanation usefulness, and be not to be used for the present invention is done any limitr.And improvement, the correction of technology, function, pattern and motion that any utilization or reference technical scope that reaches of the present invention or spirit are reached are all within patent claim of the present invention.
Use beneficial effect of the present invention to be: at first the present invention is with frictional force and folded principle design self-locking mechanism, therefore can reduce the overall volume of linear actuators relatively.
Secondly bidirectional self-locking of the present invention mechanism can all can reach the purpose of self-locking when linear actuators is made thrust or tensile load, and all is to make self-locking spring be the situation of withdrawal when driving self-locking spring, so can not produce extra load.
Moreover transmission of the present invention engagement portion is designed to two-piece type, and grooving makes the self-locking spring can be than strong fix on the external diameter of transmission engagement portion before and after respectively establishing on it.
Bushing pipe internal diameter of the present invention has in addition also designed oil groove, to increase frictional force and to provide lubricated, the self-locking mechanism of linear actuators can be increased working life relatively.
Description of drawings
Fig. 1 is the sectional perspective exploded view of the linear actuators of tool bidirectional self-locking of the present invention
Fig. 2 is the preceding generalized section of self-locking mechanism of the present invention
Fig. 3 is the back generalized section of self-locking mechanism of the present invention
[major component conventional letter]
10 power plant, 11 turbines
Grooving before the 20 transmission engagement portions 21
22 back grooving 30 self-locking springs
Folding colluded after folding colluded 32 before 31
40 bushing pipes, 41 oil grooves
50 activate longitudinal key on the connecting part 51
52 times longitudinal key 60 screw axiss
Embodiment
Fig. 1 is the sectional perspective exploded view of the linear actuators of tool bidirectional self-locking of the present invention; Wherein power source is that power plant 10 drive turbine 11, (transmission device also can be three in addition for transmission device and turbine 11 is provided with two transmission engagement portions 20, four ... transmission engagement portion 20), actuator is mainly by activating connecting part 50, screw axis 60 and nut (not drawing) are formed, and transmission engagement portion 20 socket-connects with actuating connecting part 50, must go up longitudinal key 51 by actuating connecting part 50 and reach longitudinal key 52 down, transmission engagement portion 20 and actuating connecting part 50 can be driven mutually, and torsion is passed to the screw axis 60 that activates on the connecting part 50, drive the nut (not drawing) that cooperates to make linear actuators produce start; And folding colluded 31 and colludes 32 self-locking spring 30 with back folding before device one had outside two transmission engagement portions 20, and cover is unified bushing pipe 40 again in self-locking spring 30 outside.In addition, for making the location that self-locking spring 30 can be more firm, grooving 21 before can establishing on a slice transmission engagement portion 20 and establish back grooving 22 on another sheet transmission engagement portion 20 colludes 31 with the preceding folding of self-locking spring 30 respectively and rolls over the back and to collude 32 and match.
For more detailed clear embodiments of the invention, see also Fig. 2 and Fig. 3; Fig. 2 is the preceding generalized section of self-locking mechanism of the present invention; Fig. 3 is the back generalized section of self-locking mechanism of the present invention; When the start of linear actuators when being extrapolated, power source drives two transmission engagement portions 20 and turns clockwise, and two transmission engagement portions 20 promptly drive longitudinal key 51 are up and down arranged, 52 actuating connecting part 50 rotates and transmission torsion, and load released, the preceding grooving 21 of the transmission engagement portion 20 preceding folding that also drives self-locking spring 30 colludes 31 self-locking spring 30 is rotated together at the same time, and the transmission of power direction of this moment is the inwardly direction of withdrawal of self-locking spring 30, rotates together so power that only must be very little can drive self-locking spring 30.Under this thrust load situation, if power source stops outputting power (comprise linear actuators arrives at maximum travel position and when stopping), then two transmission engagement portions 20 become unpowered state, can be rotated counterclockwise (Fig. 2) because of the reverse masterpiece of load and activate connecting part 50, the preceding folding that this last longitudinal key 51 that is rotated counterclockwise the feasible actuating of power connecting part 50 is stirred self-locking spring 30 counterclockwise colludes 31, causing self-locking spring 30 to expand outwardly external diameter and produce frictional force with bushing pipe 40 inwalls is self-lock force, the size of self-lock force just equates with load, so the position can make load be parked in power source to stop outputting power the time is unlikely any mobile.If this moment, (a) power source activated in the time of load will being continued to release (load is not to be parked in the range place when supposing former stopping herein) once more, power source begins to drive two transmission engagement portions 20 turn clockwise (Fig. 2) again, the preceding folding that transmission engagement portion 20 also drives self-locking spring 30 colludes 31, the external diameter of self-locking spring 30 expansions is withdrawn and release, so two transmission engagement portions 20 can drive self-locking spring 30 once more and activate connecting part 50 and turn clockwise together, make linear actuators continue start and release load.(b) if power source activates in the time of load will being regained once more, power source drives two transmission engagement portions 20 and is rotated counterclockwise (Fig. 3, the back folding that this moment, self-locking spring 30 was stirred in transmission engagement portion 20 collude 32 be rotated counterclockwise and the former expansion of inwardly withdrawing outside directly, folding colluded and made withdrawal in whole self-locking spring 30 outer radials at 31 o'clock and automatic unlocking before the torsion of this withdrawal reached, and two transmission engagement portions 20 also can drive once more and activate connecting part 50 and self-locking spring 30 is rotated counterclockwise and makes the load withdrawal after the release.
When the start of linear actuators is when inwardly retracting, its drive and stirring a little then with above-mentioned opposite, be that two transmission engagement portions 20 of power source drive are rotated counterclockwise (Fig. 3), the back folding that self-locking spring 30 is promptly stirred in transmission engagement portion 20 colludes 32 inwardly withdrawals, and with activate connecting part 50 and together be driven to rotate and load is retracted.And two transmission engagement portions 20 are unpowered state when power source stops outputting power, actuating connecting part 50 can be subjected to the opposite force of load and turn clockwise, the back folding that causes the last longitudinal key 51 that activates on the connecting part 50 to turn clockwise and stir self-locking spring 30 colludes 32, self-locking spring 30 external diameters are expanded outwardly and self-locking, the same reason when desiring release, as long as power source drives two transmission engagement portions 20 once more and does along the rotation of (contrary) hour hands, the preceding folding that makes transmission engagement portion 20 stir self-locking spring 30 colludes 31 (the back folding colludes 32) inwardly withdrawal, the torsion of this withdrawal reaches back folding and colludes 32 (preceding folding colludes 31) and make whole self-locking spring 30 inwardly withdrawal and automatic unlocking, does along the rotation of (contrary) hour hands and makes load release (withdrawal) so two transmission engagement portions 20 can drive self-locking spring 30 simultaneously and activate connecting part 50.This promptly illustrates the mode of execution of bidirectional self-locking.
In addition,, therefore can set up oil groove 41, with increase frictional force and provide lubricated, the self-locking mechanism of linear actuators can be increased working life relatively in bushing pipe 40 inwalls because of the generation of self-lock force is to reach by self-locking spring 30 and the frictional force between bushing pipe 40 inwalls.
Claims (5)
1. the linear actuators of a tool bidirectional self-locking is characterized in that, it mainly comprises:
One power plant are the power source of output rotary torsion;
One transmission device comprises two transmission engagement portions, the transfer mechanism of above-mentioned power plant output rotary torsion;
One activates device, comprises to activate connecting part, screw axis and nut, and this actuatings connecting part and above-mentioned transmission engagement portion socket-connect, and converts the output rotary torsion of above-mentioned transmission device to linear motion and drives load to make linearity mobile; An and self-locking mechanism, cooperatively interact to produce the mechanism of bidirectional self-locking effect by a self-locking spring and above-mentioned transmission device and actuator, above-mentioned self-locking spring is arranged at outside the above-mentioned transmission engagement portion and the two ends of self-locking spring respectively have a folding to collude, and outside self-locking spring, overlap again and unify the bushing pipe that inwall has the oil groove design, make the design of self-locking mechanism have the function of bidirectional self-locking, and power plant can not produce extra load yet.
2. the linear actuators of tool bidirectional self-locking according to claim 1 is characterized in that, grooving before establishing on a slice of transmission engagement portion and establish the back grooving on another sheet colludes with the folding at self-locking spring two ends respectively and matches, and makes the location that self-locking spring can be more firm.
3. the linear actuators of tool bidirectional self-locking according to claim 1 is characterized in that, the actuating connecting part of actuator is provided with longitudinal key, makes to activate can drive mutually after connecting part and above-mentioned transmission engagement portion socket-connect.
4. the linear actuators of tool bidirectional self-locking according to claim 1, it is characterized in that, desire drives the actuator rotation by the load generation when the transmission of power direction, then activate the connecting part and stir the folding of an end of self-locking spring and collude, self-locking spring is expanded outwardly and produce self-locking action with the friction of bushing pipe inwall.
5. the linear actuators of tool bidirectional self-locking according to claim 1, it is characterized in that, when reaching transmission device by power plant, the transmission of power direction reaches actuator again, then the folding of an end of transmission engagement portion elder generation drive self-locking spring colludes, self-locking spring is inwardly withdrawn and release, the transmission engagement portion can drive the actuating connecting part and self-locking spring together rotates, and makes linear actuators can drive load and does linear moving.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03156227 CN1590806A (en) | 2003-09-05 | 2003-09-05 | Linear actuator having bidirection self locking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03156227 CN1590806A (en) | 2003-09-05 | 2003-09-05 | Linear actuator having bidirection self locking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1590806A true CN1590806A (en) | 2005-03-09 |
Family
ID=34598353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03156227 Pending CN1590806A (en) | 2003-09-05 | 2003-09-05 | Linear actuator having bidirection self locking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1590806A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776062A (en) * | 2016-05-11 | 2016-07-20 | 南京康尼机电股份有限公司 | Lifting mechanism used for vehicle for the disabled and rail transit train |
| CN105899862A (en) * | 2013-11-21 | 2016-08-24 | 斯凯孚公司 | Valve operator assembly with freewheel and axial friction means |
| CN105899861A (en) * | 2013-11-21 | 2016-08-24 | 斯凯孚公司 | Valve operator assembly with friction means and pre-stressing element |
| CN105899860A (en) * | 2013-11-21 | 2016-08-24 | 斯凯孚公司 | Valve operator assembly with freewheel and friction means |
| CN106171666A (en) * | 2016-08-30 | 2016-12-07 | 龙南县格林庭园用品有限公司 | The laborsaving film-coiling device of novel bidirectional self-locking |
| CN106536983A (en) * | 2014-07-29 | 2017-03-22 | 利纳克有限公司 | Linear actuator |
| CN107965520A (en) * | 2017-11-28 | 2018-04-27 | 浙江中航通飞研究院有限公司 | It is a kind of can optional position locking linear motion device |
| WO2018209489A1 (en) * | 2017-05-15 | 2018-11-22 | 厦门睿康科技有限公司 | One-way self-locking device for massager |
| CN109114132A (en) * | 2017-06-23 | 2019-01-01 | 日信工业株式会社 | Electric actuator and electric parking and braking device |
-
2003
- 2003-09-05 CN CN 03156227 patent/CN1590806A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105899862A (en) * | 2013-11-21 | 2016-08-24 | 斯凯孚公司 | Valve operator assembly with freewheel and axial friction means |
| CN105899861A (en) * | 2013-11-21 | 2016-08-24 | 斯凯孚公司 | Valve operator assembly with friction means and pre-stressing element |
| CN105899860A (en) * | 2013-11-21 | 2016-08-24 | 斯凯孚公司 | Valve operator assembly with freewheel and friction means |
| CN105899862B (en) * | 2013-11-21 | 2018-06-19 | 斯凯孚公司 | Valve operator component with flywheel and axial rub device |
| CN105899860B (en) * | 2013-11-21 | 2018-06-19 | 斯凯孚公司 | Valve operator component with flywheel and rubbing device |
| CN105899861B (en) * | 2013-11-21 | 2019-10-15 | 斯凯孚公司 | Valve operator component with rubbing device and prestressed element |
| CN106536983A (en) * | 2014-07-29 | 2017-03-22 | 利纳克有限公司 | Linear actuator |
| CN105776062A (en) * | 2016-05-11 | 2016-07-20 | 南京康尼机电股份有限公司 | Lifting mechanism used for vehicle for the disabled and rail transit train |
| CN106171666A (en) * | 2016-08-30 | 2016-12-07 | 龙南县格林庭园用品有限公司 | The laborsaving film-coiling device of novel bidirectional self-locking |
| WO2018209489A1 (en) * | 2017-05-15 | 2018-11-22 | 厦门睿康科技有限公司 | One-way self-locking device for massager |
| CN109114132A (en) * | 2017-06-23 | 2019-01-01 | 日信工业株式会社 | Electric actuator and electric parking and braking device |
| CN107965520A (en) * | 2017-11-28 | 2018-04-27 | 浙江中航通飞研究院有限公司 | It is a kind of can optional position locking linear motion device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9016152B2 (en) | Actuator arrangement | |
| FI74788C (en) | Linear drive device, equipped with two motors. | |
| US6401557B1 (en) | Screw actuator | |
| JP6078311B2 (en) | Self-locking linear actuator | |
| US7458562B1 (en) | Extendible and retractable actuator | |
| EP1052427B1 (en) | Actuator | |
| CN1590806A (en) | Linear actuator having bidirection self locking | |
| US10220496B2 (en) | Reaction device for reducing stress on torque generating tools | |
| US11674563B2 (en) | Star worm gear | |
| CN110715035B (en) | Internal support multi-stage electric cylinder | |
| RU2657623C1 (en) | Peripheral docking adapter | |
| CN1854562A (en) | Linear actuator with fast releaser | |
| CN206617522U (en) | Spindle gear and power door lock | |
| CN200955317Y (en) | Passive spiral-door device locking mechanism | |
| JP2003252231A (en) | Rear wheel steering device for vehicle | |
| CN218201970U (en) | Screw rod elevator with automatic rotation function of screw rod | |
| CN220163764U (en) | Automobile electric pedal driving system | |
| CN116733926B (en) | Self-help power electric cylinder | |
| US20240093780A1 (en) | Systems and methods for sequential operation for multiple input/output systems | |
| CN110242408B (en) | Energy-saving start-stop device for engine of loader | |
| CN211624125U (en) | Telescopic device | |
| CN2368989Y (en) | Michanical ignitor for diesel engine | |
| WO2024059177A1 (en) | Systems and methods for sequential operation for multiple input/output systems | |
| CN2493117Y (en) | Curtain winding structure with rewinding force | |
| CN104832615A (en) | Linear actuator and rapid releasing device thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |