CN206439363U - Linear actuators - Google Patents

Abstract

The utility model discloses a kind of linear actuators, it includes：One extensible member, a driver and an actuating unit, the thread segment of the swingle is used to drive the extensible member to form flexible start, and the thread segment and engage the actuating unit in the second accommodation chamber of driver, actuating unit can be directly driven by thread segment, the gap indirectly produced by driving is avoided that whereby, the detecting of extensible member position is allowed to be controlled with shift length more accurate, to improve its Operational Figure Of Merit and stability.

Description

Linear actuators

Technical field

The utility model is related to a kind of actuator structure, espespecially a kind of to improve the linear of Operational Figure Of Merit and stability Actuator.

Background technology

Press, using the device of Linear transmission stroke be used in massage armchair, electrically propelled chair, electric hospital bed, treadmill, folding bed, Make position adjustment in terms of the field such as furniture and lifting mechanism, be fairly common skill, and a kind of existing Linear transmission The device of stroke, as TaiWan, China checks and approves the " linear activated of bulletin certificate number the I480476th on April 11st, 2015 Device ", it is consisted predominantly of：A kind of linear actuators, it includes a motor, a displacement unit, and one stroke control unit. Motor has wholeheartedly axle；Displacement unit includes the ringed line tooth that ring-type is provided with a worm gear, a rotating shaft, worm gear body one；OK Process control unit then has the ring-type of an at least driving member and an at least microswitch, the driving member of wherein at least one and displacement unit Line tooth is coupled and is driven by it and synchronous axial system, is the action opened or closed to a start at least microswitch.By above-mentioned, it is somebody's turn to do The operating of the i.e. controllable stroke controlling unit of invention design provided with ringed line tooth at worm gear body one.

See above-mentioned existing structure in detail to be not difficult to realize that it has remained a little weak point, main cause is as follows：The worm gear body The ringed line tooth of ring-type is provided with one, and the worm gear is sheathed on output shaft, and the output shaft is reached linearly for driving Stroke, therefore the ringed line tooth drives the trip control unit by worm gear indirectly, because the output shaft and worm gear there are company Tie gap, output wheel and stroke controlling unit will be caused to have produced micro error, the micro error as do not adjust for a long time by It can constantly increase, the sensitivity of its control and detecting is declined with stability, this technology to be solved by the utility model Problem points.

Utility model content

The utility model technical problem to be solved be for prior art exist above-mentioned missing there is provided a kind of line Property actuator.

The linear actuators that the utility model is provided a, extensible member is equipped with a swingle, and the swingle connects in one end A gearing ring gear is had, and the other end of the swingle is formed with thread segment, and the swingle drives extensible member shape with thread segment Linear displacement, driver driving has a screw rod, and the driver is covered provided with a drain pan and a lid in the outside of screw rod Body, but the drain pan is formed with one first holding part, one second holding part and one the 3rd holding part, and the extensible member is with swingle Interlock ring gear end and be arranged at the first holding part, and the screw rod is engaged by gearing ring gear, the thread segment portion of the another swingle, which is run through, to be set In second holding part, an actuating unit be installed in the 3rd holding part and include an at least reduction gearing, a measurement gear, One potentiometer, a distal end limiter and a near-end limiter, the reduction gearing engagement positioned at the second holding part thread segment, and by Reduction gearing is intermeshed with measurement gear, and the potentiometer wears measurement gear formation gearing with an axostylus axostyle, can be by current potential Device detects the position of extensible member, and the measurement gear and axostylus axostyle are coaxially formed a toe joint pipe, and integral at the toe joint pipe Form a distal end limiter, and be arranged with toe joint pipe a near-end limiter, but to should distal end limiter limited with near-end Device processed is switched in being fixed with a far-end switch and a near-end in the 3rd accommodation chamber.

Wherein, the distal end limiter is formed with a projection, and far-end switch correspondence projection is formed with a press button, and by convex Block presses press button formation driver rotation stop effect.

Wherein, the near-end limiter is formed with a convex portion, and near-end switch correspondence convex portion is formed with a button, and by convex Portion presses button formation driver rotation stop effect.

Effect of the present utility model is that the thread segment of the swingle is used to drive the extensible member to form flexible start, and The thread segment simultaneously engages the actuating unit in the second accommodation chamber of driver, allow actuating unit can by thread segment direct drive It is dynamic, the gap indirectly produced by driving is avoided that whereby, allows the detecting of extensible member position to be controlled with shift length more accurate, To improve its Operational Figure Of Merit and stability.

Brief description of the drawings

Fig. 1 is the stereogram of linear actuators of the present utility model.

Fig. 2 is the three-dimensional exploded view of linear actuators of the present utility model.

Fig. 3 is the top view of linear actuators of the present utility model.

Fig. 4 is the use state schematic diagram (one) of linear actuators of the present utility model.

Fig. 5 is the use state schematic diagram (two) of linear actuators of the present utility model.

Fig. 6 is the use state schematic diagram (three) of linear actuators of the present utility model.

Fig. 7 is the use state schematic diagram (four) of linear actuators of the present utility model.

The use state schematic diagram (five) for the linear actuators of the present utility model that Fig. 8 is.

【Symbol description】

(the utility model)

Extensible member --- -10；

Swingle --- -11；

Thread segment --- -111；

Interlock ring gear --- 12；

Driver --- -20；

Screw rod --- -- 21；

Drain pan --- -- 22；

First holding part -- 221；

Second holding part -- 222；

3rd holding part -- 223；

Lid --- -- 23；

Actuating unit --- 30；

Reduction gearing --- 31；

Measurement gear --- 32；

Toe joint pipe --- -321；

Potentiometer --- -33；

Axostylus axostyle --- -- 331；

Distal end limiter -- 34；

Projection --- -- 341；

Near-end limiter -- 35；

Convex portion --- -- 351；

Far-end switch --- 36；

Press button --- -- 361；

Near-end is switched --- and 37；

Button --- -- 371.

Embodiment

The utility model is described in further detail with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art The utility model can be better understood from and can be practiced, but illustrated embodiment is limited not as to of the present utility model.

It please first is seen as shown in Fig. 1, Fig. 2 and Fig. 3, a kind of linear actuators, it includes：One extensible member 10, one drives The actuating unit 30 of device 20 and one a, extensible member 10 is equipped with a swingle 11, and the swingle 11 is linked with a gearing in one end Ring gear 12, and the other end of the swingle 11 is formed with thread segment 111, and the swingle 11 drives extensible member with thread segment 111 10 form linear displacement, and a driver 20 driving has a screw rod 21, and the driver 20 is covered in the outside of screw rod 21 and is provided with One drain pan 22 and a lid 23, but the drain pan 22 is formed with one first holding part 221, one second holding part 222 and one the 3rd appearance Portion 223 is put, and the extensible member 10 is arranged at the first holding part 221 with the end of gearing ring gear 12 of swingle 11, and by gearing ring gear 12 engage the screw rod 21, and the part of thread segment 111 of the another swingle 11, which is run through, is located at second holding part 222, an actuating unit 30 are installed in the 3rd holding part 223 and to include an at least reduction gearing 31, a measurement gear 32, a potentiometer 33, one remote Hold the near-end limiter 35 of limiter 34 and one, the reduction gearing 31 engagement positioned at the second holding part 222 thread segment 111, and by Reduction gearing 31 is intermeshed with measurement gear 32, and the potentiometer 33 wears the measurement gear 32 formation company with an axostylus axostyle 331 It is dynamic, can detect the position of extensible member 10 by potentiometer 33, and the measurement gear 32 with axostylus axostyle 331 is coaxially formed a toe joint Pipe 321, and integrally formed with a distal end limiter 34 at the toe joint pipe 321, and it is arranged with toe joint pipe 321 near-end limitation Device 35, but to should distal end limiter 34 and near-end limiter 35 in be fixed with the 3rd accommodation chamber 223 far-end switch 36 with Near-end switch 37, wherein, the distal end limiter 34 is formed with a projection 341, and the far-end switch 36 correspondence projection is formed with one Press button 361, and the press button 361 is pressed by projection 341 form the rotation stop effect of driver 20, and the near-end limiter 35 is formed with one Convex portion 351, and the correspondence convex portions 351 of near-end switch 37 are formed with a button 371, and the button 371 is pressed by convex portion 351 formed The rotation stop effect of driver 20, accordingly, the distal end limiter 34, which can trigger far-end switch 36 and near-end limiter 35, can trigger near-end Switch 37, coordinates the angle of distal end limiter 34 and near-end limiter 35 to adjust, limit whereby the most long stroke of extensible member 10 with Shortest route.

The combination of its structure, then please as shown in Fig. 2, Fig. 3, Fig. 4 it is seen, the one end of swingle 11 is linked with gearing ring gear 12, and extensible member 10 is arranged in the thread segment 111 of the other end, and the gearing ring gear 12 of the swingle 11 is installed up to drain pan 22 First accommodation chamber 221, and allow thread segment 111 to be passed through by second accommodation chamber 222, and the gearing ring gear 12 engages the driver 20 Screw rod 21, then actuating unit 30 is installed in the 3rd accommodation chamber 223 of the drain pan 22, engaged by the reduction gearing 31 positioned at The thread segment 111 of two accommodation chambers 222, forms direct drive of the swingle 11 to reduction gearing 31, but the measurement gear 32 by The axostylus axostyle 331 of potentiometer 33 runs through, and the measurement gear 32 is arranged with near-end limiter 35 at toe joint pipe 321, and by axostylus axostyle 331 are inserted at the 3rd accommodation chamber 223 of driver 20 in the lump together with the measurement gear 32 and near-end limiter 35, allow the metering Gear 32 engages the reduction gearing 31, and the distal end limiter 34 is corresponding with the side of near-end limiter 35 is equiped with far-end switch 36 With near-end switch 37, its combination, its actual use situation can be completed by most covering the lid 23 after drain pan 22, then please be coordinated 5th figure is continuous to it is seen shown in Fig. 7, and when driver 20 starts, the screw rod 21 can drive the gearing ring gear 12, allows thread segment The 111 synchronous rotaries extensible member 10 and the displacement for forming prolonging direction, while the thread segment 111 separately directly drives the actuating unit 30 reduction gearing 31, and being slowed down by the gear ratio of reduction gearing 31, allows the measurement gear 32 driven by reduction gearing 31 Slow rotation, the rotation of the measurement gear 32 can drive the axostylus axostyle 331 of potentiometer 33, distal end limiter 34 to be limited with near-end simultaneously Device 35 processed, the potentiometer 33 detects the position for learning the extensible member 10 with resistance variations, and the distal end limiter 34 is convex The swing of block 341 presses the press button 361 of the far-end switch 36, can stop the operating of driver 20 whereby, reaches limitation extensible member 10 The purpose of most long stroke position, but when driver 20 be driven reverse the swingle 11 when, the extensible member 10 to shorten direction displacement, The measurement gear 32 of the actuating unit 30 can drive distal end limiter 34 to depart from the far-end switch 36, and the near-end limiter simultaneously 35 convex portion 351 then can be close and presses the button 371 that the near-end holds 37, extensible member 10 is parked in shortest route position, The shift length of extensible member 10 is controlled whereby, then please sees it as shown in Figure 8, can when the shift length of extensible member 10 to be changed Near-end limiter 35 is pulled down and an appropriate angle is rotated, then is inserted at the toe joint pipe 321 of the measurement gear 32, tune is reached whereby Effect of the whole shift length of extensible member 10, by means of the structure of above-mentioned specific embodiment, can obtain following benefits：The swingle 11 Thread segment 111 is used to driving the flexible start of the extensible member 10 formation, and the thread segment 111 and in the second accommodation chamber of driver 20 222 engage the actuating unit 30, allow actuating unit 30 can by thread segment 111 direct drive, indirect driving is avoided that whereby Produced gap, allows the detecting of the position of extensible member 10 to be controlled with shift length more accurate, to improve its Operational Figure Of Merit With stability.

Embodiment described above is only the preferred embodiment to absolutely prove the utility model and being lifted, the utility model Protection domain not limited to this.Equivalent substitute or change that those skilled in the art are made on the basis of the utility model Change, within protection domain of the present utility model.Protection domain of the present utility model is defined by claims.

Claims (3)

1. a kind of linear actuators, it is characterised in that include：One extensible member, the extensible member is equipped with a swingle, and should Swingle is linked with a gearing ring gear in one end, and the other end of the swingle is formed with thread segment, and the swingle is with screw thread Section drives extensible member formation linear displacement；One driver, driver driving has a screw rod, and the driver is in the outer of screw rod Surrounding is covered provided with a drain pan and a lid, and the drain pan is formed with one first holding part, one second holding part and one the 3rd appearance Portion is put, and the extensible member is arranged at the first holding part with the gearing ring gear end of swingle, and the screw rod is engaged by gearing ring gear, separately The thread segment portion of the swingle, which is run through, is located at second holding part；And an actuating unit, the actuating unit is installed in the 3rd Holding part and include an at least reduction gearing, a measurement gear, a potentiometer, a distal end limiter and a near-end limiter, Reduction gearing engagement is located at the thread segment of the second holding part, and is intermeshed by reduction gearing with measurement gear, and the current potential Device wears measurement gear formation gearing with an axostylus axostyle, and the measurement gear and axostylus axostyle are coaxially formed a toe joint pipe, and the tooth Integrally formed with a distal end limiter at adapter, and a near-end limiter is arranged with toe joint pipe, and to should distally limit Device and near-end limiter can be triggered far in being fixed with a far-end switch and near-end switch, the distal end limiter in the 3rd accommodation chamber End switch can trigger near-end switch with near-end limiter.

2. linear actuators according to claim 1, it is characterised in that the distal end limiter is formed with a projection, and should Far-end switch correspondence projection is formed with a press button, and presses the press button by projection.

3. linear actuators according to claim 1, it is characterised in that the near-end limiter is formed with a convex portion, and should Near-end switch correspondence convex portion is formed with a button, and presses the button by convex portion.