• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A linear actuator with an integral release mechanism includes an actuator body and a release mechanism (2) connected between a set of retractable tubes and a coupling (16); an adapter sleeve (21), a positioning sleeve (22) movably coupled to the adapter sleeve and connected to the coupling, a brake spring (23), a clamping sleeve (24), and a rotary selector (25). The brake spring, disposed in frictional engagement with a surface of the clamping sleeve, has an end piece positioned in the adapter sleeve and an opposite end piece in the rotary selector. When the rotary selector is rotated to move the opposite end piece, the brake spring is forced to reduce the diameter and to wrap around the adapter sleeve, releasing the frictional engagement between the brake spring and the clamping sleeve.
    公开号:FR3063124A3
    申请号:FR1851408
    申请日:2018-02-19
    公开日:2018-08-24
    发明作者:Chih-Li Hung
    申请人:Moteck Electric Corp；
    IPC主号:
    专利说明:

    LINEAR ACTUATOR WITH INCORPORATED RELEASE MECHANISM
    The present application claims the priority benefit of the Taiwanese patent application No. 106 202 430, filed February 20, 2017.
    Background of the invention 1. Field of the invention
    The present invention relates to linear actuator technology and, more particularly, to a linear actuator with built-in release mechanism, which includes a release mechanism coupled between a set of retractable tubes of an actuator body and a coupling, enabling rotation. a rotary selector of the release mechanism for putting a brake spring out of engagement with a clamping sleeve for manual actuation of the retractable tube set. 2. Description of the Related Art
    Many different types of linear actuators having different mechanical and transmission designs are known for use in power adjustable beds, massage chairs, fitness equipment, rehabilitation equipment and many other moving devices. electrically controllable for elevation or angular position adjustment. During operation of the motor in a conventional linear actuator, an articulated retractable tube is moved between an extended position and a received position to accomplish an elevation or angular position adjustment. In the event of a power failure or emergency, the user may actuate the clutch mechanism or device within the actuator to release it, allowing the lift or tilt mechanism connected to the set of retractable tubes to be quickly descended. Nevertheless, when the clutch mechanism or device is released, the actuator suddenly drops, causing the user to feel discomfort or causing component shock or damage. When this problem occurs, it is dangerous.
    FIG. 12 illustrates a prior art linear actuator design, which comprises an actuator body D, a deployment sleeve DI coupled and linearly displaceable with respect to a screw rod of the actuator body D, a first sleeve A connected to the deployment sleeve Dl, a second bushing B secured to a coupling D2 of an external device and movably coupled to the first bushing A, and a clutch module C. The clutch module C comprises a C1 cylinder connected to the second bushing B, a first operating ring C2 and a second operating ring C3 coupled to the cylinder C1. When the second operating ring C3 is not released by the user, two opposing internal protuberances Cil of the C1 cylinder are engaged in respective recessed portions DU of the deployment sleeve D1, allowing a movement of the coupling D2 of the external device with the deployment sleeve D for ajus ter elevation or angle.
    When the clutch module C is released, the internal protuberances Cil of the cylinder C1 are out of engagement with the respective recessed portions DU of the deployment sleeve D1, allowing the deployment sleeve D1 to be displaced back and forth. of the screw rod by the external device, and thus quickly lower the external device. However, if the external device carries a heavy person or is carrying a heavy load, it will force the deployment sleeve D1 to retract suddenly, scare the user and affect the user's mood, and lead to a security problem. or component damage. Thus, the life or the good of the user will suffer a loss or serious injury. An improvement is necessary on this subject. Summary of the invention
    The present invention has been accomplished in view of the foregoing circumstances. An object of the present invention is to provide a linear actuator with built-in release mechanism, which comprises an actuator body and a release mechanism. The release mechanism is connected between a set of retractable tubes and a coupling of the actuator body, comprising an adapter sleeve connected to the set of retractable tubes, a positioning sleeve coupled in motion to the adapter sleeve and connected to the coupling, a brake spring mounted around the adapter sleeve, a clamping sleeve fitted to the positioning sleeve and the brake spring and connected to the positioning sleeve, and a rotary selector attached to the clamping sleeve. The brake spring is disposed in frictional engagement with an inner surface of the clamping sleeve, having an end piece positioned in the adapter sleeve, and an opposed end piece positioned in the rotary selector. When the user rotates the rotary selector to move the opposite end piece, the brake spring is forced to reduce the diameter and to wrap around the adapter sleeve, releasing the frictional engagement between the spring of brake and the clamping sleeve and allowing manual actuation of the set of retractable tubes during a power failure or mechanical failure. Thus, the invention greatly enhances the operational safety.
    In addition, the actuator body of the linear actuator with built-in release mechanism can be installed in a hinge or console seat of an external device (such as an electrically adjustable bed, a massage chair, a fitness or rehabilitation apparatus), an elevator or any other equipment. In installation, the connecting rod of the carrier block and the coupling of the actuator body are respectively pivotally connected to the articulation or to the console seat of the external device by threaded bolts or a pivot axle, and the mechanism of release is constantly connected between the set of retractable tubes and the coupling without occupying any internal space of the actuator body and without having to change the specification of the external device. When an emergency condition occurs, the set of retractable tubes can be manually operated to shorten the length, lowering the external device. This release mechanism design not only simplifies the overall structure and difficulty of making a mold, but also facilitates the alignment of assembly work, effectively saving labor and assembly cost and realizing the effects. easy assembly and a stable structure. Other advantages and features of the present invention will be fully understood from the detailed description together with the accompanying drawings, in which like reference numerals designate identical structural components.
    Brief description of the drawings
    Figure 1 is an oblique top elevational view of a linear actuator with integral release mechanism in accordance with the present invention.
    Fig. 2 is an exploded view of the linear actuator with release mechanism incorporated in accordance with the present invention.
    Figure 3 corresponds to Figure 2 in a view from another angle.
    Figure 4 is an exploded view of the release mechanism.
    Figure 5 corresponds to Figure 4 in a view from another angle.
    Fig. 6 is a sectional side view of the linear actuator with integral release mechanism in accordance with the present invention.
    Fig. 7 is a sectional elevational view of a portion of the linear actuator with release mechanism incorporated in accordance with the present invention.
    Figure 8 illustrates the external appearance of the release mechanism before actuation.
    Figure 9 is a sectional view of the release mechanism before actuation.
    Figure 10 corresponds to Figure 9, illustrating the actuated release mechanism.
    Fig. 11 is a schematic sectional side view of the present invention, illustrating the set of retracted retractable tubes.
    Figure 12 is an exploded view of a release mechanism for a linear actuator according to the prior art.
    Detailed Description of the Preferred Embodiment
    Referring to FIGS. 1 to 7, an oblique top elevational view of a linear actuator incorporating an integral release mechanism in accordance with the present invention, an exploded view of the linear actuator incorporating an integral release mechanism, a another exploded view of the linear actuator with built-in release mechanism, an exploded view of the release mechanism, a sectional side view of the linear actuator with built-in release mechanism and a cross-sectional elevational view of a part of the linear actuator with built-in release mechanism are shown. As illustrated, the linear actuator with built-in release mechanism comprises an actuator body 1 and a release mechanism 2.
    The actuator body 1 comprises a carrier block 11 consisting of two symmetrical annular shells 111 and defining therein a receiving chamber 110 and an opening 1101 in each of the opposite up and down sides thereof in communication with the chamber. home 110, a connecting rod 112 secured to the two annular shells 111 and deployed out of the opening 1101 in the bottom side of the carrier block 11, a set of gears 12 mounted in the reception chamber 110 and comprising at least one gear d drive (for example, a worm gear) 121, and a mechanical drive 13 comprising a motor 131 mounted on the carrier block 11 on the outside and a drive shaft (for example, a worm) 132 inserted into the interior of the carrier block 11 and meshing with the drive gear 121 of the gear set 12 to rotate the gear set 12.
    The actuator body 1 comprises a transmission mechanism 14, a set of retractable tubes 15 and a coupling 16. The transmission mechanism 14 comprises a mother screw 141 disposed perpendicular to or parallel to the motor 131. The lower end of the screw mother 141 passes through the drive gear 121. The set of retractable tubes 15 is retracted linearly coupled to an opposite top end of the lead screw 141 outside the carrier block 11, comprising an outer tube 153 fixedly connected to the carrier block 11, a retractable inner tube 151 axially displaceable in and out of the outer tube 153, and a slider 152 threaded on the lead screw 141 and connected to an inner end of the retractable inner tube 151. The coupling 16 is connected to an outer end opposite the inner retractable tube 151, and axially displaceable with the inner retractable tube 151 with respect to the mother screw 141, for a connection ent with an external device. The actuator body 1 can be integrated in a variety of ways. Modifications may be made to the actuator body without departing from the spirit and scope of the invention.
    The release mechanism 2 is coupled between the retractable inner tube 151 of the set of retractable tubes 15 and a coupling head 161 of the coupling 16, comprising an adapter sleeve 21, a positioning sleeve 22, a brake spring 23, a clamping sleeve 24 and a rotary selector 25. The adapter sleeve 21 comprises an adapter hole 211 defined axially in one end thereof and fixed on the retractable inner tube 151, a first pinhole 2111 cut transversely to its periphery in communication with the adapter hole 211, a first pin 2112 mounted in the first pinhole 2111 and inserted transversely through a first through hole 1511 of the retractable inner tube 151 to secure the adapter sleeve 21 to the inner tube retractable 151, a coupling hole 212 defined axially in an opposite end of the matching hole 211 thereof and coupled in motion to the dou 22, an outer flange 2121 deployed around the coupling hole 212 includes a first engagement groove 213, and a pillar 214 located at the center of the coupling hole 212.
    The positioning sleeve 22 comprises a positioning hole 221 defined axially in one end thereof opposite the adapter sleeve 21 and coupled to the coupling head 161 of the coupling 16, a second pinhole 2211 cut transversely to the periphery thereof in communication with the positioning hole 221, a second pin 2212 mounted in the second pinhole 2211 and inserted through a second through hole 1611 of the coupling head 161 to secure the positioning sleeve 22 to the coupling head 161, and a plurality of stop blocks 222 spaced equiangularly around the periphery of the positioning hole 221.
    The brake spring 23 comprises a continuous series of elastic ring portions 230 mounted on the periphery of the adapter sleeve 21, and a positioning means 231 which comprises a first end piece 2311 and a second end piece 2312 deployed respectively from the two opposite ends of the continuous series of elastic ring portions 230 in different directions.
    The clamping sleeve 24 is made of metal or fiber reinforced plastic material and mounted around the locating sleeve 22 and the brake spring 23, including an inner sleeve surface 241 which is disposed in frictional engagement with the brake spring 23 and a through hole 2411 cut transversely through the inner sleeve surface 241. The second pin 2212 mentioned above is inserted through the second pin hole 2211 of the positioning sleeve 22 and the second through hole 1611 of the coupling head 161 with the two opposite ends thereof secured to the through hole 2411 of the clamping sleeve 24 to secure the positioning sleeve 22, the coupling 16 and the clamping sleeve 24 together.
    The rotary selector 25 is fixed on the clamping sleeve 24, comprising two annular shells 251 stowed together, an insertion space 250 surrounded by the two annular shells 251, two mounting holes 2501 respectively defined in the two annular shells 251 in communication with opposite up and down sides of the insertion space 250 and respectively movingly coupled to the adapter sleeve 21 and the positioning sleeve 22, a plurality of positioning holes 253 arranged equiangularly in a high side of an annular shell 251, a diameter of the mounting hole 2501 is smaller than an inner diameter of the annular shell 251, a plurality of locating rods 254 arranged equiangularly in a bottom side of the other annular shell 251 and respectively secured to the positioning holes 253, and a plurality of second engaging grooves 252 arranged axially in the space In addition, the two annular shells 251 can be stowed together with screws.
    In this embodiment, the matching hole 211 of the adapter sleeve 21 is attached to the retractable inner tube 151 of the retractable tube set 15, and then the adapter sleeve 21 and the retractable tube set 15 are stowed. together by the first peg 2112; the positioning hole 221 of the positioning sleeve 22 is fixed on the coupling 16, then the positioning sleeve 22 and the coupling 16 are stowed together by the second pin 2212. These mounting procedures are not a limitation not limited. A key and groove technique, screw assembly, welding and other mounting techniques may be selectively employed to accomplish the connection between the adapter sleeve 21 and the retractable tube set 15 and the connection between the socket positioning 22 and the coupling 16.
    In this embodiment, the first end piece 2311 of the positioning means 231 of the brake spring 23 is positioned in the first engagement groove 213 of the adapter sleeve 21, and the second end piece 2312 of the positioning means. 231 of the brake spring 23 is deployed outside the lower side of the clamping sleeve 24 and positioned in a second engaging groove 252 of the rotary selector 25. Before insertion of the brake spring 23 into the clamping sleeve 24, the diameter external of the brake spring 23 is greater than the inner diameter of the inner sleeve surface 241. Accordingly, when the second end piece 2312 of the positioning means 231 of the brake spring 23 is turned clockwise, the portions of elastic ring 230 are tightened to reduce the diameter for insertion into the clamping sleeve 24 and a fixation on the adapter sleeve 21. Thus, when the force liquefied is released from the brake spring 23, the elastic restoring energy of the brake spring 23 immediately forces the brake spring 23 into frictional engagement with the inner sleeve surface 241 of the clamping sleeve 24.
    Referring to FIGS. 8-11, an elevational view of the release mechanism before actuation, a sectional top view of the release mechanism, a sectional top view of the set of retractable tubes and a sectional side view of the set of retractable tubes are shown. As illustrated, the actuator body 1 of the linear actuator with built-in release mechanism is installed in a hinge or console seat of an external device (such as an electrically adjustable bed, a massage chair, a fitness or rehabilitation apparatus), an elevator or any other equipment. The rod 112 of the carrier block 11 and the coupling 16 are pivotally connected respectively to the articulation or to the console seat of the external apparatus by a threaded bolt or a pivot axle, and the release mechanism 2 connected constantly between the set of retractable tubes 15 and the coupling 16 without occupying any internal space of the actuator body 1 and without the need to change the specification of the external device or to make a mold of different specification. The invention can also be used in an existing or commercial actuator of any other design, saving costs.
    After installation, the brake spring 23 of the release mechanism 2 is held in frictional engagement with the inner sleeve surface 241 of the clamping sleeve 24 with one of the locating means 231 positioned in the first engaging groove. intake 213 of the adapter sleeve 21. When the motor 131 of the mechanical drive 13 drives the drive shaft 132 to rotate the gear set 12, the gear set 12 drives the lead screw 141 of the transmission mechanism 14 for moving the slide 152 of the set of retractable tubes 15, forcing the retractable inner tube 151 and the adapter sleeve 21 against the positioning means 231 of the brake spring 23, and thus the elastic ring portions 230 are deployed to abut against the inner sleeve surface 241 of the clamping sleeve 24, prohibiting rotation of the retractable inner tube 151 and the adapter sleeve 21. Therefore, the slide 152 is moved along the lead screw 141, causing linear movement of the retractable inner tube 151 relative to the carrier block 11 to expand or shorten the length of the linear actuator, and the coupling 16 is forced to lift the joint or the Console seat of the external device, performing an elevation or angular adjustment.
    In operation, rotate the annular shells 251 of the rotary selector 25 clockwise to force the second engaging groove 252 of the rotary selector 25 against the second end piece 2312 of the positioning means 231 of the brake spring 23 in the opposite direction. time, tighten the elastic ring portion 230 so that it winds around the adapter sleeve 21 and release the frictional engagement between the elastic ring portions 230 and the inner sleeve surface 241 of the clamping sleeve 24. Therefore, the adapter sleeve 21 is released from the constraint of the clamping sleeve 24. As a result, when the external device is pushed back (for example, downwards) against the coupling 16 under the Due to the influence of its own weight or external force, the positioning sleeve 22 can be pushed against the adapter sleeve 21 to move the retractable inner tube 151 and the slide 152 along the screw. mother 141 to shorten the length of the set of retractable tubes 15. Thus, the set of retractable tubes 15 is manually operable to shorten the length during a power failure or mechanical failure, enhancing the operational safety. This release mechanism design 2 not only simplifies the overall structure and difficulty of making a mold, but also facilitates the alignment of assembly work, effectively saving labor and assembly cost and accomplishing the same. effects of easy assembly and stable structure.
    As described above, the release mechanism 2 is coupled between the set of retractable tubes 15 and the coupling 16 of the actuator body 1; the positioning sleeve 22 is coupled in displacement to the adapter sleeve 21; the brake spring 23 is mounted around the periphery of the adapter sleeve 21; the clamping sleeve 24 is fixed on the positioning sleeve 22 and the brake spring 23; the rotary selector 25 is fixed on the clamping sleeve 24; the brake spring 23 is peripherally disposed in frictional engagement with the inner sleeve surface 241 of the clamping sleeve 24; when the user actuates the rotary selector 25 to move the brake spring 23, the brake spring 23 is forced to reduce its diameter and to wrap around the adapter sleeve 21, causing a disengagement between the brake spring 23 and the clamping sleeve 24, allowing manual actuation of the set of retractable tubes 15 during a power failure or a mechanical failure and enhancing the operational safety.
    Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and improvements can be made without departing from the spirit and scope of the invention. Accordingly, the invention is not limited except by the appended claims.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    Linear actuator with incorporated release mechanism, characterized in that it comprises: an actuator body (1) comprising a carrier block (11), a gear train (12) mounted in said carrier block (11) a mechanical drive (13) adapted to rotate said gear train (12), a transmission mechanism (14) comprising a lead screw (141) meshing with said gear train (12), a set of tubes retractable means (15) retractably linearly coupled to said lead screw (141) outside said carrier block (11) and a coupling (16) connected to an outer end of said retractable inner tube (151) outside said block carrier (11) and movable axially with said retractable inner tube (15Γ) relative to said lead screw (141); and a release mechanism (2) coupled between said set of retractable tubes (15) and said coupling (16), said release mechanism (2) comprising an adapter sleeve (21) connected to said set of retractable tubes (15) a positioning sleeve (22) connected to said coupling (16) and displaceably coupled to said adapter sleeve (21), a brake spring (23) mounted around said adapter sleeve (21), said spring brake (23) comprising a positioning means (231), a clamping sleeve (24) connected to said positioning sleeve (22) and fixed on said positioning sleeve (22) and said brake spring (23) and a rotary selector (25) fixed on said clamping sleeve (24), said positioning means (231) of said brake spring (23) comprising a first end piece (2311) and a second end piece (2312) respectively deployed from two ends opposite of it in live different ions, said first end piece (2311) being positioned in said adapter, said second end piece (2312) being extended out of said clamping sleeve (24) and positioned in said rotary selector (25), said brake spring (23) being ) being peripherally disposed in frictional engagement with an inner surface of said clamping sleeve (24); and wherein, when rotating said rotary selector (25) to move said second end piece (2312) of said positioning means (231) of said brake spring (23) in one direction, said brake spring (23) is forced to reduce its diameter and to wind around said adapter sleeve (21), releasing the frictional engagement between said brake spring (23) and said clamping sleeve (24).
    [2" id="c-fr-0002]
    The linear actuator with integral release mechanism according to claim 1, wherein said mechanical drive (13) comprises a motor (131) mounted on said carrier block (11), and a drive shaft (132) inserted into said block carrier (11) and meshing with said gear train (12).
    [3" id="c-fr-0003]
    A linear actuator with an integral release mechanism according to claim 1, wherein said set of retractable tubes (15) of said actuator body (1) comprises an outer tube (153) fixedly connected to said carrier block (11), a tube retractable inner member (151) movable axially in and out of said outer tube (153), and a slider (152) affixed to an inner end of said retractable inner tube (151) and threaded onto said lead screw (141).
    [4" id="c-fr-0004]
    The linear actuator with integral release mechanism according to claim 3, wherein said adapter sleeve (21) of said release mechanism (2) comprises an adapter hole (211) defined axially in one end thereof and attached to said retractable inner tube (151), and a coupling hole (212) axially defined in an opposite end thereof and releasably coupled to said positioning sleeve (22).
    [5" id="c-fr-0005]
    The linear actuator with integral release mechanism according to claim 4, wherein said adapter sleeve (21) further comprises an outer flange (2121) deployed about said coupling hole (212), and a first engagement groove (21). socket (213) at said outer flange (2121) for positioning said first end piece (2311) of said positioning means (231) of said brake spring (23).
    [6" id="c-fr-0006]
    The linear actuator with integral release mechanism according to claim 3, wherein said positioning sleeve (22) of said release mechanism (2) comprises a positioning hole (221) defined axially in an end thereof opposite said adapter socket (21) coupled to said coupling (16); said clamping sleeve (24) is attached to said positioning sleeve (22), defining thereon an inner sleeve surface (241) for frictional engagement with said brake spring (23).
    [7" id="c-fr-0007]
    The linear actuator with integral release mechanism according to claim 1, wherein said brake spring (23) of said release mechanism (2) further comprises a continuous series of elastic ring portions (230); said first end piece (2311) and said second end piece (2312) of said positioning means (231) are respectively deployed from two opposite ends of said continuous series of elastic ring portions (230) in different directions.
    [8" id="c-fr-0008]
    The linear actuator with integral release mechanism according to claim 1, wherein an outer diameter of said brake spring (23) of said release mechanism (2) is larger than an inner diameter of said clamping sleeve (24).
    [9" id="c-fr-0009]
    The linear actuator with integral release mechanism according to claim 1, wherein said rotary selector (25) of said release mechanism (2) comprises two annular shells (251) stowed together, an insertion space (250) surrounded by said two annular shells (251), and two mounting holes (2501) respectively defined in said two annular shells (251) in communication with opposite up and down sides of said insertion space (250) and respectively relocably coupled to said socket (21) and to said positioning sleeve (22), diameters of said mounting holes (2501) are smaller than diameters of said annular shells (251).
    [10" id="c-fr-0010]
    The linear actuator with integral release mechanism according to claim 9, wherein said rotary selector (25) further comprises a second engagement groove (252) defined in said insertion space (250) for positioning said second end piece (2312) of said positioning means (231) of said brake spring (23).
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    同族专利:
    公开号 | 公开日
    FR3063124B3|2020-01-10|
    TWM543929U|2017-06-21|
    US20180238426A1|2018-08-23|
    GB201802536D0|2018-04-04|
    GB2561672A|2018-10-24|
    引用文献:
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    GB9928070D0|1999-11-29|2000-01-26|Beldray Ltd|A handwheel for a nursery gate adjustment mechanism|
    DK1637775T3|2004-09-20|2008-10-06|Skf Ab|Linear drive with an emergency shift option|
    US20060243075A1|2005-05-02|2006-11-02|Hiwin Mikrosystem Corp.|Linear actuator with quick release mechanism|
    DE202005011632U1|2005-07-20|2006-11-30|Dewert Antriebs- Und Systemtechnik Gmbh & Co. Kg|gearmotor|
    AU2006286941B2|2005-09-02|2011-06-16|Linak A/S|Actuator|
    TWM452540U|2012-12-27|2013-05-01|Timotion Technology Co Ltd|Electric cylinder and rapid release mechanism thereof|
    DE202018100747U1|2018-02-12|2018-03-02|Moteck Electric Corp.|Linear actuator with integrated release mechanism|USD923677S1|2018-12-19|2021-06-29|Timotion Technology Co., Ltd.|Linear actuator|
    TWM582551U|2019-05-27|2019-08-21|第一傳動科技股份有限公司|Actuating device with hand-rotating and anti-pinch mechanism|
    USD919683S1|2021-02-23|2021-05-18|Timotion Technology Co., Ltd.|Linear actuator|
    法律状态:
    2019-02-28| PLFP| Fee payment|Year of fee payment: 2 |
    2020-02-28| PLFP| Fee payment|Year of fee payment: 3 |
    2021-02-26| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    TW106202430U|TWM543929U|2017-02-20|2017-02-20|Release device for electric pushing rod|
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