CN201181422Y

CN201181422Y - Actuator with adjustable limit switch

Info

Publication number: CN201181422Y
Application number: CNU2008200008554U
Authority: CN
Inventors: 曾贤德
Original assignee: Moteck Electric Corp
Current assignee: Moteck Electric Corp
Priority date: 2008-03-13
Filing date: 2008-03-13
Publication date: 2009-01-14
Anticipated expiration: 2018-03-13

Abstract

The utility model relates to an actuator with an adjustable limit switch. At least more than one limit switch is arranged inside the actuator, an accommodating space for accommodating a screw rod and a transmission rod is formed inside the casing of the actuator, a positioning base with a plurality of clamping slots on the surface thereof are arranged on one side of the accommodating space, the transmission rod is driven by the forward and reverse rotations of the screw rod to perform linear reciprocating displacement, the limit switches are positioned on the displacement path on the transmission rod, a press key is arranged above the base of each limit switch, a positioning device is arranged on one side of the base, a positioning groove for accommodating the positioning base is arranged on the surface of the positioning device, and projections which are clamped relative to the clamping slots are arranged on the side adjacent to the positioning groove. By the above structure design, a user can randomly change the positions of the limit switches only by the steps of manually pulling the limit switches out of the positioning base and clamping the projections into the corresponding clamping slots in the proper positions on the positioning base, so as to adjust the relative distance between two limit switches, thereby adjusting the reciprocating displacement of the transmission rod.

Description

Actuator with adjustable limit switch

Technical field

The utility model is for providing a kind of actuator with adjustable limit switch, refers to that especially two limit switches in the actuator can be changed its relative distance arbitrarily, and then can adjust the limit switch of shift reciprocately amount of the drive link of actuator.

Background technology

In the mechanism of many linear transmission strokes, as electric hospital bed, treadmill, folding bed etc., with the adjustment of limit switch as the position, be suitable common with popularize, the start position of its linear transmission stroke and final position, must the limit of utilization switch as the journey of going of linear course, the control of backhaul, and make limit switch be installed in the initial point position and the sink node position of linear path respectively, when mechanism goes the Cheng Hangjin displacement with linear transmission, and the touching final position limit switch the time, can change the backhaul displacement into by switching mechanism, when if mechanism touches the limit switch of starting point when the backhaul displacement, switching mechanism changes Cheng Weiyi into once more, so forms linear shift reciprocately action.

See also shown in Figure 6, it is the synoptic diagram of prior art limit switch, find out by knowing among the figure, the linear actuator of prior art mainly includes gearing A, two limit switch B form, when the drive link A1 of gearing A is shift reciprocately by screw rod A2 driving, the A11 of the portion that presses on its drive link A1 can be for the limit switch B that compresses the beginning or end position respectively, if press the limit switch B that the A11 of portion compresses starting point, just can notify drive link A1 to move forward, if compress the limit switch B of terminal point, then notify drive link A1 to reset, make drive link A1 can form reciprocal spacing displacement with this, yet this kind structural design still has following shortcoming on reality is used:

(1) the shift reciprocately amount of this drive link A1 is to go to control by the relative distance of two limit switch B, but the relative distance between this two limit switch B is to be arranged on the fixed position by welding, can not change the position of limit switch B, and cause drive link A1 only can do moving of same displacement amount at every turn, still restricted greatly on using.

(2) from the above, the specification of adding various linear actuators is neither together, so the assembly position of each limit switch B may not be identical, so, manufacturer must design the gearing A of the various drive link A1 of multiple correspondence displacement, and causes the product inventory problem of management and hoard pressure.

(3) again because gearing A after permanent use, can produce the situation of rocking or being offset between its drive link A1 and the screw rod A2 unavoidably takes place, so, drive link A1 presses the position of limit switch B may not be accurate, possible a little error, and cause difference in the use, and add limit switch B position can not adjust, make this kind structural design still have very big room for improvement.

Be with, how to solve the prior art limit switch can arbitrarily change position and drive link displacement in assembling, when using problem, be the direction place that the relevant manufacturer that is engaged in the industry desires most ardently the research improvement.

Summary of the invention

So the inventor is to collect related data because above-mentioned shortcoming, via assessing in many ways and consider, and engaging in the many years of experience of the industry accumulation, via constantly studying and revise, the beginning is designed this kind novel with the actuator of adjustable limit switch.

Actuator with adjustable limit switch of the present utility model, in actuator, be provided with at least more than one limit switch, wherein the enclosure interior of this actuator is formed with the accommodation space that can supply to accommodate screw rod and drive link, and screw rod is linear shift reciprocately by the positive and negative driving drive link of transferring, limit switch then is positioned on the displacement path of drive link, wherein: accommodation space one side of this actuator is provided with the positioning seat of a plurality of draw-in grooves of surperficial tool; This limit switch is that activity orientation is on the positioning seat of actuator, and the pedestal of limit switch top is provided with button, and be provided with locating device in pedestal one side, and the locating device surface is provided with for accommodating the locating slot of positioning seat, and be provided with the projection of corresponding fixing with draw-in groove adjacent to locating slot one side.

Major advantage of the present utility model be limit switch can the positioning seat in actuator on arbitrarily change bit put, after the user only must pull away positioning seat with limit switch with hand, the position that on positioning seat, is fit to again, fix with projection in the corresponding draw-in groove of location seating face, the limit switch active card is fixed on the positioning seat, adjust the relative distance of two limit switches with this, and then can adjust the shift reciprocately amount of actuator drive link.

Description of drawings

Fig. 1 is the three-dimensional appearance synoptic diagram of the utility model preferred embodiment;

Fig. 2 is the perspective exploded view of the utility model preferred embodiment;

Fig. 3 is the three-dimensional appearance synoptic diagram of the utility model limit switch;

Fig. 4 is the synoptic diagram () of the utility model preferred embodiment when using;

Fig. 5 is the synoptic diagram (two) of the utility model preferred embodiment when using;

Fig. 6 is the synoptic diagram of prior art limit switch.

Description of reference numerals:

The 1-actuator; The 10-accommodation space; The 11-housing; The 12-motor; The 121-worm screw; The 13-screw rod; The 131-worm gear; The 14-drive link; The 141-internal thread; The 142-pushing block; The 15-positioning seat; The 151-draw-in groove; The 16-socket part; The 17-metal collar;

The 2-limit switch; The 21-pedestal; The 22-button; 23-electrode pin; The 24-locating device; The 241-locating slot; The 242-projection; 243-buckle portion;

The A-gearing; The A1-drive link; The A2-screw rod; A11-presses portion; The B-limit switch.

Embodiment

For reaching above-mentioned purpose and effect, technological means that the utility model adopted and structure thereof, drawing now illustrates in detail that with regard to preferred embodiment of the present utility model its feature and function are as follows, in order to understanding fully.

See also shown in Fig. 1,2,3, it is respectively three-dimensional appearance synoptic diagram, the perspective exploded view of the utility model preferred embodiment, the three-dimensional appearance synoptic diagram of limit switch, find out by knowing among the figure, the utility model is the limit switch 2 that is provided with at least more than one in actuator 1, wherein:

This actuator 1 is the motor 12 that is provided with tool worm screw 121 in housing 11 1 sides, and housing 11 inside are formed with can be for the accommodation space 10 of accommodating screw rod 13 and drive link 14, and be provided with worm gear 131 with worm screw 121 engagement in screw rod 13 1 sides, screw rod 13 other sides then are equipped with the drive link 14 of tool internal thread 141, and drive link 14 surfaces are provided with pushing block 142, accommodation space 10 1 sides in housing 11 are provided with positioning seat 15 in addition, and positioning seat 15 surfaces have a plurality of dentation draw-in grooves 151.

This limit switch 2 is provided with the button 22 that triggers its running in pedestal 21 tops, pedestal 21 belows then are provided with a plurality of electrode pin 23, and be positioned with locating device 24 in pedestal 21 1 sides, these locating device 24 surfaces are provided with a locating slot 241, and locating slot 241 1 sides are provided with at least more than one projection 242, then are provided with buckle portion 243 away from projection 242 other sides.

Moreover, by above-mentioned each member in when assembling, earlier screw rod 13 is penetrated in the internal thread 141 that is engaged in drive link 14, put into the accommodation space 10 of housing 11 again, and the worm gear 131 of screw rod 13 other sides and the worm screw 121 of motor 12 are meshing with each other, limit switch 2 then fastens on the positioning seat 15 that is positioned at housing 11 inside by locating device 24, make pushing block 142 places of the button 22 of limit switch 2 corresponding to drive link 14, in addition, the open front of this housing 11 has a socket part 16, and socket part 16 can be used for a metal collar 17 sockets, strengthens whole assembling intensity with this, can finish overall package of the present utility model.

Please consult Fig. 2 simultaneously to shown in Figure 5, it is respectively the perspective exploded view of the utility model preferred embodiment, the three-dimensional appearance synoptic diagram of limit switch, synoptic diagram (one) and the synoptic diagram (two) of preferred embodiment when using, find out by knowing among the figure, when motor 12 drives worm screw 121 rotations, can drive the worm gear 131 that meshes with worm screw 121 rotates simultaneously, and screw rod 13 also can pass through worm gear 131 synchronous starts, make drive link 14 be the shift reciprocately of linearity by the internal thread 141 and the engagement driving of screw rod 13, limit switch 2 then cooperates the straight-line displacement path of the pushing block 142 of drive link 14, is electrically connected at the initial point position and the place, final position of rectilinear path respectively with electrode pin 23.

When screw rod 13 drives the shift reciprocately stroke of drive link 14 work linearities, if pushing block 142 catatrepsis of drive link 14 are to terminal during the position, then pushing block 142 can touch the button 22 of position at the limit switch 2 of destination county, motor 12 is shut down, and then guarantee the destination county that drive link 14 puts in place at last, avoid drive link 14 over-travel and break away from screw rod 13; If screw rod 13 reverse runnings and when driving drive link 14 and resetting, 142 of the pushing blocks of its drive link 14 return the initial point position place, and make pushing block 142 touch the button 22 of position at the limit switch 2 at starting point place, and notice motor 12 shuts down, drive link 14 is resetted really, prevent that drive link 14 from crossing limit switches 2 and locked with this, cause worm gear 131 to move and collapse tooth with screw rod 13.

And the initial point position of above-mentioned limit switch 2 or final position can be different according to demand of using or design, and can change the relative distance of two limit switches 2 arbitrarily, the locating device 24 movable buckles that mainly make limit switch 2 one sides are on positioning seat 15, the projection 242 of locating device 24 is fastened in the corresponding draw-in groove 151, and positioning seat 15 is contained in the locating slot 241, buckle portion 243 then is fastened in positioning seat 15 belows, form firm location structure with this, when the user desires the relative distance of conversion two limit switches 2, only need limit switch 2 to be pulled away positioning seat 15 with hand, the position that on positioning seat 15, is fit to again, fix in the corresponding draw-in groove 151 with projection 242, limit switch 2 active card are fixed on the positioning seat 15.

Be with, projection 242 shapes of these limit switch 2 one side locating devices 24 can be a spline-simulating, and corresponding draw-in groove 151 also is a spline-simulating, make projection 242 can with the firm fixing location of draw-in groove 151, its projection 242 shapes also can be square shape, the dovetail shape, design such as circular-arc grade, only need make limit switch 2 fix easily or break away from positioning seat 15 gets final product, so can reach the structure of aforementioned effect such as, device is contained by the utility model all should, simple and easy modification of this kind and equivalent structure change, all should in like manner be contained in the claim of the present utility model, the spy adds and is illustrated in this.

The actuator of the adjustable limit switch of above-mentioned the utility model band when reality is used, for can having following advantage, as:

The utility model can be according to the design of actuator or user demand and is changed the position of limit switch 2 arbitrarily, the user only must pull away positioning seat 15 with limit switch 2 with hand, the position that on positioning seat 15, is fit to again, fix in the corresponding draw-in groove 151 with projection 242, limit switch 2 active card are fixed on the positioning seat 15, adjust the relative distance of two limit switches 2 with this, and then can adjust the shift reciprocately amount of drive link 14.

So; can to adjust its relative distance arbitrarily on positioning seat 15 be main key protection point to the utility model in order to be primarily aimed at limit switch 2; and the structural design of above-mentioned actuator 1 is an example with the drives structure of worm gear, worm screw mainly; but the utility model is when practical application; then be not to be to exceed with the drives structure of worm gear, worm screw; also can be applicable in the mechanism of other linear transmissions, only need make limit switch 2 can adjust the position arbitrarily.

Above embodiment only is preferred embodiment of the present utility model, and it is illustrative for the utility model, and nonrestrictive.Those skilled in the art carries out conversion, modification even equivalence to it under the situation that does not exceed the utility model spirit and scope, these changes all can fall into claim protection domain of the present utility model.

In sum, the actuator of the adjustable limit switch of the utility model band has obvious effect when using promotes, and really meets novelty, practicality and creationary patent requirement, files an application in accordance with the law.

Claims

1, a kind of actuator with adjustable limit switch, in actuator, be provided with at least more than one limit switch, wherein the enclosure interior of this actuator is formed with the accommodation space that can supply to accommodate screw rod and drive link, and screw rod is linear shift reciprocately by the positive and negative driving drive link of transferring, limit switch then is positioned on the displacement path of drive link, it is characterized in that:

Accommodation space one side of this actuator is provided with the positioning seat of a plurality of draw-in grooves of surperficial tool;

This limit switch is that activity orientation is on the positioning seat of actuator, and the pedestal of limit switch top is provided with button, and be provided with locating device in pedestal one side, and the locating device surface is provided with for accommodating the locating slot of positioning seat, and be provided with the projection of corresponding fixing with draw-in groove adjacent to locating slot one side.

2, the actuator with adjustable limit switch according to claim 1 is characterized in that, this actuator one side is provided with the motor of tool worm screw, and is provided with worm gear with worm mesh in screw rod one side.

3, the actuator with adjustable limit switch according to claim 1 is characterized in that, this drive link inside has the internal thread with screw engages.

4, the actuator with adjustable limit switch according to claim 1 is characterized in that, this drive link surface is provided with the pushing block that can touch the limit switch button.

5, the actuator with adjustable limit switch according to claim 1 is characterized in that, the pedestal below of this limit switch is provided with a plurality of electrode pin.

6, the actuator with adjustable limit switch according to claim 1 is characterized in that, this locating device is provided with the buckle portion that can fix the positioning seat bottom away from other side of projection.

7, the actuator with adjustable limit switch according to claim 1 is characterized in that, the projection shape of this locating device is spline-simulating, and the draw-in groove of positioning seat is spline-simulating equally.

8, the actuator with adjustable limit switch according to claim 1 is characterized in that, the projection shape of this locating device is the dovetail shape, and the draw-in groove of positioning seat is the dovetail shape equally.