TWM536712U - Linear actuator - Google Patents

Description

Linear actuator

This creation relates to an actuator structure, and more particularly to a linear actuator that improves operational sensitivity and stability.

According to the device with linear transmission stroke, it is a very common skill to use position adjustment in the fields of massage chair, electric chair, electric bed, treadmill, folding bed, furniture and ascending mechanism, and a linear transmission is known. The device of the stroke, as described in the "Linear Actuator" of the No. I480476, issued on April 11, 104, which is issued by the Department of Health, which mainly includes: a linear actuator comprising a motor and a displacement unit And a trip control unit. The motor has a spindle; the displacement unit comprises a worm wheel and a rotating shaft, wherein the worm wheel body is provided with an annular ring-shaped wire tooth; the stroke control unit has at least one transmission component and at least one micro-switch, wherein at least one transmission component The ring-shaped wire teeth of the displacement unit are coupled to and driven to rotate synchronously to actuate the at least one micro-switch to open or close. According to the above, the present invention can control the operation of the stroke control unit by designing a ring-shaped wire tooth at one portion of the worm wheel body.

Looking at the above-mentioned conventional structure, it is not difficult to find that there are still some shortcomings. The main reason is as follows: the worm wheel body is provided with a ring-shaped annular tooth, and the worm wheel is sleeved on the output shaft. The output shaft is used for driving to achieve a linear stroke. Therefore, the annular thread indirectly drives the stroke control unit through the worm wheel. Since the output shaft and the worm wheel have a joint gap, the output wheel and the stroke control unit are generated. Minor error, the micro error will not be adjusted for a long time It will continue to increase, so that the sensitivity and stability of its control and detection will decrease. This is the technical problem that the creative is trying to solve.

In view of this, the creator has been engaged in the manufacturing development and design experience of related products for many years. After detailed design and careful evaluation, the author has finally achieved a practical and practical creation.

The technical problem to be solved by the present invention is to provide a linear actuator in view of the above-mentioned deficiencies of the prior art.

A rotating rod is provided with a rotating rod, and the rotating rod is connected with an interlocking ring at one end, and the other end of the rotating rod is formed with a threaded section, and the rotating rod drives the telescopic member to form a linear displacement with a threaded section, and a drive is driven The bottom of the screw is provided with a bottom cover and a cover body, and the bottom case is formed with a first receiving portion, a second receiving portion and a third receiving portion. The telescopic member is disposed on the first receiving portion with the interlocking ring end of the rotating rod, and the screw is engaged by the interlocking ring gear, and the threaded portion of the rotating rod is inserted through the second receiving portion, and the movable unit is installed. The third accommodating portion includes at least one reduction gear, a metering gear, a potentiometer, a distal limiter and a proximal limiter, and the reduction gear meshes with the threaded portion of the second accommodating portion, and The reduction gear and the metering gear are in mesh with each other, and the potentiometer is connected with the metering gear by a shaft rod, and the position of the telescopic member can be detected by the potentiometer, and the metering gear and the shaft rod form a toothed joint coaxially. The toothed tube A stopper integrally formed with a distal end, and the tooth has a proximal end sleeve Nozzles stopper, stopper and a distal end of the proximal end of stopper should be fixed within a distal end of the third switch receiving portion and a proximal end switch.

The distal limiter is formed with a bump, and the remote switch corresponds to the bump A push button is formed, and the push button is pressed by the bump to form a drive rotation preventing effect.

The proximal limiter is formed with a convex portion, and the proximal switch is formed with a button corresponding to the convex portion, and the button is pressed by the convex portion to form a driver rotation preventing effect.

The main purpose of the present invention is that the threaded portion of the rotating rod is used to drive the telescopic member to form a telescopic movement, and the threaded portion engages the actuating unit at the second receiving portion of the driver to allow the actuating unit to receive the threaded portion. The direct drive can avoid the gap generated by the indirect drive, and the position detection and displacement distance control of the telescopic member can be more precise, so as to improve the operational sensitivity and stability.

Other objects, advantages and novel features of the present invention will become more apparent from the detailed description and the accompanying drawings.

[this creation]

10‧‧‧Flexible parts

11‧‧‧Rotary rod

111‧‧‧Threaded section

12‧‧‧ linkage tooth ring

20‧‧‧ drive

21‧‧‧ screw

22‧‧‧ bottom case

221‧‧‧First Housing Department

222‧‧‧Second accommodating department

223‧‧‧ Third Housing Department

23‧‧‧ Cover

30‧‧‧Activity unit

31‧‧‧Reducing gear

32‧‧‧Measuring gear

321‧‧‧ teeth take over

33‧‧‧potentiometer

331‧‧‧ shaft

34‧‧‧Remote limiter

341‧‧‧Bumps

35‧‧‧ proximal limiter

351‧‧‧ convex

36‧‧‧Remote switch

361‧‧‧ button

37‧‧‧ Near-end switch

371‧‧‧ button

The first picture is a perspective view of the creation.

Figure 2 is an exploded view of the creation.

Figure 3 is a top view of the creation.

Figure 4 is a schematic diagram of the state of use of this creation (1).

Figure 5 is a schematic diagram of the state of use of this creation (2).

Figure 6 is a schematic diagram of the state of use of this creation (3).

Figure 7 is a schematic diagram of the state of use of this creation (4).

Figure 8 is a schematic diagram of the state of use of this creation (5).

In order to enable your review board to make more progress on the purpose, characteristics and efficacy of this creation. One step of understanding and understanding, please follow the following [simplified description of the schema] as follows:

First, as shown in FIG. 1 , FIG. 2 and FIG. 3 , a linear actuator includes: a telescopic member 10 , a driver 20 and an actuating unit 30 , and a telescopic member 10 is provided with a Rotating the rod 11 , and the rotating rod 11 is connected with an interlocking ring 12 at one end, and the other end of the rotating rod 11 is formed with a threaded section 111, and the rotating rod 11 drives the telescopic member 10 to form a linear displacement by the threaded section 111. The driver 20 is driven by a screw 21, and the driver 20 is covered with a bottom shell 22 and a cover 23 at the outer periphery of the screw 21. The bottom shell 22 is formed with a first receiving portion 221 and a second receiving portion. 222 and a third accommodating portion 223, and the telescopic member 10 is disposed on the first accommodating portion 221 at the end of the interlocking ring 12 of the rotating rod 11, and the screw 21 is engaged by the interlocking ring gear 12, and the rotating rod 11 is further engaged. The threaded portion 111 is partially formed in the second receiving portion 222. The actuating unit 30 is mounted on the third receiving portion 223 and includes at least one reduction gear 31, a metering gear 32, a potentiometer 33, and a a distal limiter 34 and a proximal limiter 35, the reduction gear 31 meshes with the threaded section 111 of the second receiving portion 222 And the reduction gear 31 and the metering gear 32 are in mesh with each other, and the potentiometer 33 is connected with the metering gear 32 via a shaft 331, and the position of the telescopic member 10 can be detected by the potentiometer 33, and the metering gear 32 is The shaft 331 is coaxially formed with a toothed joint 321 , and a distal end limiter 34 is integrally formed at the toothed joint 321 , and a proximal limiter 35 is disposed at the toothed joint 321 , and the distal limiter 34 is adjacent thereto. The end limiter 35 is fixed with a distal switch 36 and a proximal switch 37 in the third receiving portion 223. The distal limiter 34 is formed with a bump 341, and the distal switch 36 forms a pressure corresponding to the bump. The button 361 is pressed by the protrusion 341 to form a rotation stop effect of the driver 20, and the proximal limiter 35 is formed with a convex portion 351, and the proximal switch 37 is formed with a button 371 corresponding to the convex portion 351, and The protrusion 351 presses the button 371 to form a rotation stop effect of the driver 20, whereby the distal limiter 34 can trigger the far The end switch 36 and the proximal limiter 35 can trigger the proximal switch 37 to cooperate with the angle adjustment of the distal limiter 34 and the proximal limiter 35, thereby limiting the longest stroke and the shortest stroke of the telescoping member 10.

The combination of the structures is as shown in the figures 2, 3, and 4, and the rotating rod 11 is coupled to the interlocking ring 12 at one end, and is disposed on the telescopic member 10 at the other end of the threaded portion 111. The interlocking ring 12 of the rod 11 is mounted to the first receiving portion 221 of the bottom case 22, and the threaded portion 111 is passed through the second receiving portion 222, and the interlocking ring 12 engages the screw 21 of the driver 20. The actuating unit 30 is further disposed on the third receiving portion 223 of the bottom case 22, and the reducing gear 31 meshes with the threaded portion 111 of the second receiving portion 222 to form a direct rotation of the rotating rod 11 to the reduction gear 31. Driven, the metering gear 32 is penetrated by the shaft 331 of the potentiometer 33, and the metering gear 32 is sleeved at the toothed joint 321 with a proximal limiter 35, and is limited by the shaft 331 together with the metering gear 32 and the proximal end The device 35 is inserted into the third receiving portion 223 of the driver 20, and the measuring gear 32 is engaged with the reduction gear 31. The distal limiter 34 is disposed at the distal end of the proximal limiter 35. The combination of the switch 36 and the proximal switch 37, and finally closing the cover body 23 with the bottom case 22, can complete the combination thereof, and the actual use situation, please cooperate 5 is continuous to the view of FIG. 7. When the driver 20 is activated, the screw 21 can drive the interlocking ring 12, and the threaded section 111 synchronously rotates the telescopic member 10 to form an elongation direction displacement, and the thread The segment 111 directly drives the reduction gear 31 of the actuating unit 30 and decelerates through the gear ratio of the reduction gear 31, so that the metering gear 32 driven by the reduction gear 31 is slowly rotated, and the rotation of the metering gear 32 simultaneously drives the potentiometer. 33 shaft 33, distal limiter 34 and proximal limiter 35, the potentiometer 33 detects the position of the telescopic member 10 by resistance change, and the bump 341 of the distal limiter 34 is swung Pressing the push button 361 of the remote switch 36, thereby stopping the operation of the driver 20 to limit the longest stroke position of the telescopic member 10, and when the driver 20 reversely drives the rotary lever 11, the extension The reducing member 10 is displaced in the shortening direction, and the metering gear 32 of the actuating unit 30 can drive the distal limiter 34 away from the distal switch 36, and the convex portion 351 of the proximal limiter 35 approaches and presses the proximal portion The button 371 of the opening 37 is opened, so that the telescopic member 10 can be stopped at the shortest stroke position, thereby controlling the displacement distance of the telescopic member 10, and then, as shown in FIG. 8, when the displacement distance of the telescopic member 10 is to be changed, The proximal limiter 35 can be removed and rotated at an appropriate angle, and then inserted into the toothed joint 321 of the metering gear 32, thereby achieving the effect of adjusting the displacement distance of the telescopic member 10, which can be obtained by the structure of the above specific embodiment. The following benefits: the threaded section 111 of the rotating rod 11 is used to drive the telescopic member 10 to form a telescopic movement, and the threaded section 111 engages the actuation unit 30 at the second receiving portion 222 of the driver 20 for actuation. The unit 30 can be directly driven by the thread segment 111, thereby avoiding the gap generated by the indirect drive, and the position detection and displacement distance control of the telescopic member 10 is more precise, so as to improve the operational sensitivity and stability.

In summary, this creation has indeed achieved a breakthrough structural design, and has improved new content, while at the same time achieving industrial use and progress, and this creation is not seen in any publication, but also novel, when In accordance with the provisions of the relevant laws and regulations of the Patent Law, a new type of patent application is filed according to law, and the examination authority of the bureau is required to grant legal patent rights.

Only the above-mentioned ones are only preferred embodiments of the present invention, and the scope of the creation of the present invention cannot be limited thereto; that is, the equal changes and modifications made by the majority of the patent application scope of the present invention should still belong to the present invention. Within the scope of the patent.

10‧‧‧Flexible parts

11‧‧‧Rotary rod

111‧‧‧Threaded section

12‧‧‧ linkage tooth ring

20‧‧‧ drive

21‧‧‧ screw

22‧‧‧ bottom case

221‧‧‧First Housing Department

222‧‧‧Second accommodating department

223‧‧‧ Third Housing Department

23‧‧‧ Cover

30‧‧‧Activity unit

31‧‧‧Reducing gear

32‧‧‧Measuring gear

321‧‧‧ teeth take over

33‧‧‧potentiometer

331‧‧‧ shaft

34‧‧‧Remote limiter

341‧‧‧Bumps

35‧‧‧ proximal limiter

351‧‧‧ convex

36‧‧‧Remote switch

361‧‧‧ button

37‧‧‧ Near-end switch

371‧‧‧ button

Claims (3)

A linear actuator comprising: a telescopic member, the telescopic member is provided with a rotating rod, and the rotating rod is coupled with a linkage toothed ring at one end, and the other end of the rotating rod is formed with a threaded segment, and the rotation The rod drives the telescopic member to form a linear displacement by a threaded segment; the driver drives a screw, and the driver is covered with a bottom shell and a cover body on the outer periphery of the screw, and the bottom shell is formed with a first receiving portion a second accommodating portion and a third accommodating portion, wherein the telescopic member is disposed at the first accommodating portion with the interlocking ring end of the rotating rod, and the screw is engaged by the interlocking ring gear, and the thread of the rotating rod The step portion is disposed in the second receiving portion; and the actuating unit is disposed in the third receiving portion and includes at least one reduction gear, a metering gear, a potentiometer, and a distal limit And a proximal limiter, the reduction gear meshes with the threaded section of the second accommodating portion, and is engaged with the metering gear by the reduction gear, and the potentiometer is connected with the metering gear by a shaft to form a linkage Detection and scaling Positioned, and the metering gear and the shaft are coaxially formed with a toothed joint, and a distal end limiter is integrally formed at the toothed joint, and a proximal limiter is disposed at the toothed joint, and the distal limiter is correspondingly And the proximal limiter is fixed in the third receiving portion with a distal switch and a proximal switch, the distal limiter can trigger the distal switch and the proximal limiter to trigger the proximal switch, thereby limiting the longest length of the telescopic member Itinerary and shortest itinerary. The linear actuator of claim 1, wherein the distal limiter is formed with a bump, and the distal switch is formed with a push button corresponding to the bump, and the push button is pressed by the bump to form a driver. Stop turning effect. The linear actuator of claim 1, wherein the proximal limiter is formed with a convex portion, and the proximal switch is formed with a button corresponding to the convex portion, and the button is pressed by the convex portion to form a driver stop rotation. effect.