TWI278581B - Linear actuator with dual direction self-locking mechanism - Google Patents

Abstract

A linear actuator with dual direction self-locking mechanism which can lock the load if linear actuator at the position where power stop. The self-locking mechanism combines with the transmission, move device and the spring. This mechanism can unlock the system automatically and will not make extra load while operate the linear actuator. Linear actuator with both pull and push load can use this mechanism.

Description

1278581 V. INSTRUCTION DESCRIPTION OF THE INVENTION (1) Technical Field of the Invention The present invention relates to a self-locking mechanism for use in any of the inventions as a linear actuator. Automatically locks when the motor is stopped. [Prior Art] The general linear actuator is mainly composed of equal parts; firstly, the motor will be rotated out of the force shaft, and then transmitted to the transmission shaft by the rotational torque of the output shaft and the output shaft, and the screw shaft is fitted with a nut 昼-# When the fish 1 drive shaft rotates, the nut thrust or tension causes the load to move the work object to achieve linearity. The conventional linear actuator has the disadvantage of reducing the linearity if it is not based on the friction between the mechanisms. Dynamic motor load. In addition, the self-locking structure is a position when the motor is stopped when the motor is stopped; for example, it is exclusively wrapped on the outer diameter of the transmission shaft, and the spring mode is a linear actuator that drives the transmission to self-locking when the motor is running, linearly When the motor of the actuator is stopped, the linearity can cause the load to not slip and stabilize the body, the motor, the output shaft and the drive shaft. The torque is transmitted from the full rod to the transmission wheel to the transmission. The shaft is axially engaged, so that the moving shaft can be arranged, and the screw is arranged on the transmission shaft and the inner tube of the load is connected to the nut; when the screw converts the rotational force of the screw shaft into a line tube for retracting or retracting The purpose of movement and actuation. When the self-locking mechanism is counted, the actuator locks the purpose of locking, and the friction between the mechanisms is the speed of the hoisting operation and increases the linear actuator of the mechanism, which self-locks the shaft' so that the load does not slip and stops at EP 0 662573 is to fix one end of a coil spring to the body, and when the self-locking shaft pushes the load, the coil spring is here 1275881 £' invention description (2): the force direction is J open, so the coil spring is equivalent If it does not exist, it will not work. When the damper 1 stops, the drive shaft will be rotated by the load due to gravity. This 柃 spiral yellow is locked in the direction of the torque, so it is self-locking. This self-locking method: the disadvantage is that if the seat is to be reversed and the load is retracted, the motor force must be greater than the self-locking torque of the coil spring. This also causes additional load on the motor. JF load closing. [Invention purpose]

The object of the present invention is to provide a linear actuator with two-way self-locking, and the design of the two self-locking mechanism has the function of two-way self-locking 35, so that the power device can be activated by the reverse rotation of the power device. Lock; the device does not generate additional load. [Features] The linear actuating device and the self-locking machine of the present invention can transfer the self-locking device of the invention through the transmission device to cooperate to generate a bidirectional square torsion force, so that the load can not be slid. In order to achieve the above objectives, the transmission device and the propagating device are used.

The automatic force device outputs a rotating torque to the actuating device to actuate the linear actuator, wherein the self-locking spring and the transmission device and the mechanism for actuating the yoke lock function stop the wheeling, The actuating mechanism of the actuator is automatically locked and negative, and the present invention uses the friction force and the overlapping design~ the actuation device and the self-locking mechanism interact to achieve

Page 6 !278581 V. Invention Description Two-way self-locking function. Firstly, the transmission device is provided with a torque to be engaged with the transmission engagement portion; then the self-locking device and the device are matched with each other; and the actuation device rotates the load; but when the power device is in the device, it becomes no The power state is driven to reverse, but in the outward expansion and the outer wall generating force device, the power is again output to drive the self-locking spring to rotate in the same direction, so the purpose of the two-way self-locking is not achieved. In summary, the present invention rotates the needle or counterclockwise to control the linear actuator, as long as the moving device is transmitted to the actuating device to be normally pushed out or retracted; instead, the actuating device is rotated to rotate the self-locking mechanism to actuate and actuate. Further understanding of the following reference and description of the present invention relating to the present invention, and not the mechanism design can be 'that is, regardless of the direction of the movement, the lock mechanism does not transmit the direction if the clockwise or inverse linear actuator enlists the technical internal pattern, however The invention can be used in any position where the self-locking of the structure of the transmission device is at least two pieces, when the power device is pushed, at any position, the frictional resistance of the actuating device will be the contracted outer diameter of the load belt, and the power device is self-locking or not. Transmission, from the power (regardless of the device to make the special mode and the opposite and actuating drive card structure, so that the spring is set with the power of the self-locking spring to stop the output will reverse the self-locking. When moving, the transmission is carried out by the design of the generating device and can be brought to the transmission wheel when the belt is also driven by the load. On the other hand, the self-locking bomb has an unlocking action external load; the dynamic power transmission is used to move the line from the negative needle to the unloading capacity. Please attach the limit to the coupling to actuate and transmit and transmit The dynamic transmission drives the outer diameter of the transmission gravity spring, and when the dynamic power is transmitted and the transmission capability is transmitted to the transmission actuator to generate gravity, the movement is moved. Detailed reference drawings are for the sole purpose. And the invention is based on the technical function of the invention and the technical scope or spirit of the present invention. The improvement and modification of the type and the motion mechanism are all within the scope of the application. Insulting again

1 is a partial exploded perspective view of a linear actuator with two-way self-locking according to the present invention; wherein the power source, that is, the power unit 1 〇 drives the turbine 丨丨, and the turbine 丨丨 1 is provided with two transmission engaging portions 20 as transmissions (The other transmission device is also a three-piece four-piece transmission locker 20), and the actuating device is mainly composed of an actuating mechanism 450, a screw shaft β 〇 and a nut (not shown), and The transmission engaging portion 2 套 is sleeved with the actuation joint portion 50, and the transmission engagement portion 2〇 and the actuation joint portion are actuated by actuating the upper side key 51 and the lower long side key 52 of the joint portion 5 5〇 can drive each other' and transmit the torque to the screw shaft 6〇 on the actuating joint 5〇, and the matching nut (not shown) is used to actuate the linear actuator; and the two-piece transmission engagement portion The outer device of the 20 outer device has a self-locking spring with a front folding hook 31 and a rear folding hook 32 to fit a liner 40 outside the self-locking spring 30. In addition, in order to make the self-locking bullets reach a stable position, a front slot 21 can be provided on one of the drive engaging portions 2, and a rear slot 22 is provided on one of the drive engaging portions 2, respectively The folding hook 31 and the rear folding hook 32 are matched with the self-locking elastic cyanine 30. For a more detailed description of the embodiments of the present invention, please refer to FIG. 2 and FIG. 3; wrong; ^ is a schematic cross-sectional view of the self-locking mechanism of the present invention; FIG. 3 is a schematic cross-sectional view of the self-twisting mechanism of the present invention; It is outwardly pushed out = 丄 = force source drives the two-piece transmission engaging portion 2 to rotate clockwise, and the two-piece transmission B portion 20 - that is, the movable joint portion 50 of the upper and lower rectangular keys 51, 52

Page 8 1278851 V. Description of the invention (5) Force one, and - like - 裘 il also, at the same time the drive engagement portion 2 : :: groove 21 also drives the front folding hook 31 of the self-locking spring 30 The lock magazine 3〇 together with J turn', and the power transmission direction at this time is the side of the self-locking spring 3〇 retracted inward, so the self-locking spring can be driven only by the small force 3〇_= under load 'If the power source stops outputting power (including linear actuation)

Ξΐί When the large stroke position is stopped, the two-piece transmission engagement portion 20 changes to the unpowered state, and the actuation coupling portion 50 rotates counterclockwise due to the reverse force of the load (Fig. 2). This counterclockwise rotation force The upper rectangular key 51 of the actuating joint 5〇 is rotated counterclockwise to push the front folding hook 31 of the self-locking spring 3〇, so that the self-locking magazine 30 expands the outer diameter outward and generates friction with the inner wall of the liner 4 Self-locking force, since: the force is exactly the same as the load phase f, so the load can be stopped when the power source stops the transmission of the power. If at this time (a) the power source starts again to push the load forward (this assumes that the load is not stopped at the original stop, the large stroke), the power source starts to drive the two drive engagement parts 2 as a 4 stitch. Red turn (Fig. 2), the drive engaging portion 2〇 also drives the front folding hook 31 of the self-locking magazine (10), so that the outer diameter of the expansion of the self-locking spring 30 is retracted and unlocked, so the two-piece transmission engaging portion 20 can be again The self-locking spring 3〇 and the actuating joint 5〇 are rotated together to rotate the linear actuator to continue to push the load. (b) If the power source is restarted to recover the load, the power source drives the two-piece transmission engaging portion 20 to rotate counterclockwise (Fig. 2). At this time, the transmission engaging portion is moved after the self-locking magazine 30 The folding hook 32 rotates counterclockwise and retracts back to the outer diameter of the original expansion. When the retracted torque is transmitted to the front folding hook 31, the entire self-locking spring 3 is retracted radially outwardly and automatically unlocked. The plate drive engaging portion 2〇 can also drive the actuation coupling portion 50 and the self-locking spring 3 to rotate counterclockwise and retract the load.

Page 9 1278581

V. Description of invention (6)

When the linear actuator is pulled back inward, the driving and turning points are opposite to the above, that is, the power source drives the two driving engagement portions 2 to rotate counterclockwise (Fig. 3) 'drive engagement portion 20, that is, the rear folding hook 3 2 of the self-locking spring 3 缩 is retracted inward, and is rotated together with the actuating coupling portion 50 to pull the load back. When the power source stops outputting power, the two-piece transmission engaging portion 2 is in an unpowered state 'the actuation coupling portion 50 is rotated clockwise by the reverse force of the load', so that the actuation joint portion 50 is actuated. The upper rectangular key 5 1 rotates clockwise and dials the rear folding hook 32 of the self-locking magazine 30, so that the outer diameter of the self-locking spring 3〇 is expanded outward and self-locking, and the same is true when the unlocking is to be performed, as long as the power source is driven again. The two-piece transmission engaging portion 20 rotates clockwise (reverse), so that the front engagement hook 31 (the rear folding hook 32) of the self-locking spring 30 of the transmission engaging portion 2 is retracted inward, and the retracted torque is reversed. Passing to the rear folding hook 32 (front folding hook 31), the entire self-locking spring 3〇 is retracted inwardly and automatically unlocked, so that the two-piece transmission engaging portion 2〇 can simultaneously drive the self-locking magazine 3〇 and actuate the combination. The portion 50 rotates clockwise (reverse) and pushes the load out (retracted). This explains the implementation of two-way self-locking. In addition, the self-locking force is achieved by the friction between the self-locking spring 3〇 and the inner wall of the liner 4〇, so that the oil groove 4 i can be added to the inner wall of the liner 4

In order to increase the friction and provide lubrication, the self-locking mechanism of the linear actuator can be relatively increased in service life. [Effect of Invention] t First, the present invention designs a self-locking mechanism based on the frictional force and stacking principle, so that the overall volume of the linear actuator can be relatively reduced. Secondly, the two-way self-locking mechanism of the invention can be used for thrusting in a linear actuator

Page 10 1278581

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial exploded perspective view of a linear actuator with two-way self-locking according to the present invention. FIG. 2 is a schematic cross-sectional view of the self-locking mechanism of the present invention. FIG. Schematic diagram [main part representative symbol] 10 Power unit 11 Turbine 20 Drive engagement part 21 Front slot 22 Rear slot 30 Self-locking spring 31 Front fold hook 32 Rear fold hook 40 Liner 41 Oil groove 50 Actuating joint 51 Upper square key 5 2 Lower square key 60 Screw shaft

Claims (1)

1278581 VI. Patent application scope 1 · A linear actuator with two-way self-mixing 4 & + # lock, power device, inflammation considers that the output rotary torque includes two pieces of drive engagement gearing actuating device out of the rotating torque The transmission includes an actuation joint, a coupling portion and an output rotation of the transmission transmission device to drive the load linearly. A self-locking spring cooperates with the upper portion to generate a double self-locking spring disposed at each end of the lock spring. The design of the self-locking mechanism on the inner wall of the casing is not equipped with a power device. 2. Please refer to the patent poem described in the patent garden. I. The front part of the drive engagement part - the front groove of the knife is different from the self-locking elastic. 4- ^ m ^ ^ The two folds of the beggar are relatively stable. The main power source part of the self-locking mechanism is a mechanism; the screw car is moved by the engaging part to rotate the torque; the transmission is self-locking, and the above-mentioned one-folding hook oil groove has two-way additional two-way self-cutting groove, and the power device is included The transmission and nut phase sleeves are converted into a movable engagement with the device and the action, and the self-locking load is designed. 'The actuation' will be the above linear motion actuating device mechanism, the upper outer and self-locking spring liner to make the function, and the linear actuator of the lock is set on the other piece to make the self-locking spring available. In the patent specification, the actuating device and the two-way self-locking actuating joint portion described in the first item of the above-mentioned transmission card garden are provided with a rectangular key, and the joint portions can be mutually driven after being sleeved. Linear actuator for actuating the joint Page 13 1278821 VI. The scope of the application for patents, the rotation of the rotation of the rotation of the device from the sentence to the sentence - double belt with the desire to produce the production of the item 1 negative first from the Fang Fangli handed a special request Force to move as if • 5 4 outward spring σ & - lock self-hook. Folding for the end lock, one from the spring, the spring is produced, the lock is rubbed, the wall is moved, the inner tube is lining and the knot is moved, and the tension is expanded to the r± transmission line. The description of the installation of the force of the movement 1 ± from the Department of the Department to Fan Fangli handed a special request to force the implementation of the role of 5 • 5 5 The automatic movement of the 弹 合 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁 锁1 lock / 3⁄4 〇 and move page 14