CN102647048B

CN102647048B - Stroke limit device used for linear actuator and take-up mechanism thereof

Info

Publication number: CN102647048B
Application number: CN201110044138.8A
Authority: CN
Inventors: 吴周欣
Original assignee: FIRST TRANSMISSION TECHNOLOGY Co Ltd
Current assignee: FIRST TRANSMISSION TECHNOLOGY Co Ltd; Timotion Technology Co Ltd
Priority date: 2011-02-17
Filing date: 2011-02-17
Publication date: 2014-05-07
Anticipated expiration: 2031-02-17
Also published as: CN103601043A; CN103601043B; CN102647048A

Abstract

The invention discloses a stroke limit device used for a linear actuator and a take-up mechanism thereof. The linear actuator comprises an engine base and an extension tube, and the stroke limit device comprises a box body, a movable component, a block body, a pair of switches and a take-up mechanism. The box body is fixed at the engine base and is provided with a wallboard, and a through hole is arranged at the wallboard. The movable component comprises a rod body which penetrates through the through hole and can move relatively to the box body, and the block body is fixedly connected onto the rod body. The positions of the pair of switches corresponding to the block body are fixedly arranged at the box body, each switch is provided with a triggering part on which the block body touches to generate an electric signal, and the triggering parts are respectively positioned at two phases of different ends of a move path of the block body. The take-up mechanism comprises a line body which is placed in the extension tube and moves along with the extension tube, and one end of the line body is connected with the movable component. Thus, the stroke limit device can utilize the actuating range of small space to control the extreme position of a long distance.

Description

Stroke restricting means and take-up mechanism thereof for electric cylinder

Technical field

The present invention relates to a kind of electric cylinder, relate in particular to a kind of electric cylinder stroke restricting means and take-up mechanism thereof.

Background technology

Current electric cylinder (Linear Actuator) is on the market of a great variety, wherein having a kind of electric cylinder is on a support, to assemble a motor and an outer tube, at support, settle a driving screw and drive driving screw rotation with motor, separately in driving screw outside, be bolted with a telescoping tube, and in the outside socket of telescoping tube one outer tube, one end of outer tube is to be fixed on support; So telescoping tube can be with the driving of motor, and axially with respect to outer tube, do linear reciprocating displacement along driving screw, but this kind of electric cylinder also cannot learn whether its telescoping tube has moved to the stroke end when start, so continue start in unwitting situation at telescoping tube start to the stroke end, just may cause the damage of this electric cylinder.

Industry is for solving foregoing problems, just develop a kind of linear electrical cylinder of tool stroke restricting means, it is that the end positions of portion is within the outer tube separately installed with a switch, and the one end that utilizes telescoping tube has protruded out a block, in the inside retraction of telescoping tube or while being outwards moved out to extreme position, its block will touch each switch and make motor stop driving, by this to reach the object of controlling the electric cylinder actuating travel limit.

But, although said structure has the object of controlling the electric cylinder actuating travel limit, but its switch is the inside that is disposed in outer tube, outer tube must form the space of settling for each switch especially for this reason, not only causes the increase assembly material cost of the difficult and suitable amplitude of making of outer tube; Another each switch is the two-end-point place that lays respectively at outer tube inside, in the maintenance process damaging, must carry out to electric cylinder the dismantlement work of most of assembly at assembly, and makes maintenance become suitable loaded down with trivial details and inconvenience; In addition, for the electric cylinder of some special shapes or specification, aforesaid stroke restricting means can not be installed setting, and the utmost point is waited to be improved and overcome.

Summary of the invention

An object of the present invention, is to provide a kind of electric cylinder stroke restricting means, and it utilizes the start scope in little space can be used for controlling the extreme position of long distance with the configuration structure of each composition assembly.

To achieve the above object, the invention provides a kind of electric cylinder stroke restricting means, described electric cylinder comprises a support and a telescoping tube, the trip restraint device comprises a box body, a movable member, a block, pair of switches, a take-up mechanism, this box body is fixed on described support, this box body has a wallboard, at this wallboard, offers a through hole; This movable member comprises this through hole of cross-under and can make the body of rod moving relative to this box body; This block is fixed in this body of rod; This is fixed on this box body to corresponding this block position of switch, and each this switch has a trigger unit that produces electric signal for this block touching, and respectively this trigger unit is positioned at respectively the two-phase heterodoxy of this block mobile route; This take-up mechanism is placed in described telescoping tube and follows movement, and this take-up mechanism comprises a line body, and one end of this line body is connected to this movable member; The inside retraction of wherein said telescoping tube promotes this body of rod during to extreme position and moves together with this block, this block will touching this trigger unit wherein and make described telescoping tube stop retracting; When described telescoping tube convex extends extreme position, with this line body, pull this body of rod to move together with this block, this block will touch another this trigger unit and make described telescoping tube stop shifting out.

Another object of the present invention, is to provide a kind of take-up mechanism for electric cylinder, and it can furl inner line body, to avoid line body to be wound in inner each assembly when lax.

To achieve the above object, the invention provides a kind of take-up mechanism for electric cylinder, described stroke restricting means comprises a movable member, and this take-up mechanism comprises a pedestal, a reel, a volute spring and a line body, and this pedestal is extended with a projection; This reel is articulated on this projection; One end of this volute spring is fixed on this projection other end and connects this reel; Two ends of this line body are separately fixed at this reel and described movable member; Wherein this reel is activated by the elastic force of this volute spring, and this reel of military order produces rotation and this line body is furled.

The present invention also has following effect, and it is to utilize the oblique plane of block to come touch trigger portion, can in minimum space, be equipped with maximum displacement, is reached integrally-built miniaturization.With the setting of back-moving spring, make block after external force discharges automatically reversion to original position placed in the middle.Utilize take-up mechanism setting, the tension masterpiece used time can be by reel automatic rolling for online body, and can effectively avoid being wound around and pulling apart by intraware.By adjusting screw cross-under on the end plate of telescoping tube, can finely tune operation by the shift motion to telescoping tube from outside.

Below in conjunction with the drawings and specific embodiments, describe the present invention, but not as a limitation of the invention.

Accompanying drawing explanation

Fig. 1 stroke restricting means of the present invention is for electric cylinder three-dimensional exploded view;

Fig. 2 stroke restricting means three-dimensional exploded view of the present invention;

Fig. 3 take-up mechanism three-dimensional exploded view of the present invention;

Fig. 4 take-up mechanism assembled sectional view of the present invention;

Fig. 5 stroke restricting means of the present invention is for electric cylinder combination schematic diagram;

Fig. 6 stroke restricting means of the present invention is for electric cylinder assembled sectional view;

Fig. 7 stroke restricting means of the present invention is used state diagram () for electric cylinder;

Fig. 8 stroke restricting means of the present invention is used state diagram (two) for electric cylinder.

Wherein, Reference numeral

1... stroke restricting means

10... box body

11... base plate 12... wallboard

13... side plate 14... through hole

20... movable member

21... body of rod 211... slot

212... thread segment 22... block

221... stopper section 222... perforation

223... the first screw 23,23 ' ... back-moving spring

24... clasp

30... block

31... oblique plane 32... axis hole

40,40 ' ... switch

41,41 ' ... trigger unit

50... take-up mechanism

51... coverboard under pedestal 511...

512... go up coverboard 513... projection

514... profile groove 515... post hole

516... screw 52... reel

521... ring in foreign steamer 522...

523... flange 53... volute spring

531... interpolating unit 532... hook part

54... line body 55... guide pillar

56... adjust screw rod

8... electric cylinder

81... support 82... motor

83... transmission mechanism 831... driving screw

84... stationary pipes 85... telescoping tube

851... outer tube 852... inner tube

853... nut 854... end plate

Embodiment

Relevant detailed description of the present invention and technology contents, coordinate accompanying drawing to be described as follows, but appended accompanying drawing only provides reference and explanation use, is not used for the present invention to be limited.

Refer to shown in Fig. 1, the invention provides a kind of electric cylinder stroke restricting means and take-up mechanism thereof, this trip restraint device 1 mainly comprises a box body 10, a movable member 20, a block 30, pair of switches 40,40 ' and one take-up mechanism 50.

Refer to shown in Fig. 2, it is made that box body 10 can be plastic or other material, it is mainly formed by a base plate 11 with from the base plate 11 upwardly extending a pair of wallboards 12 in edge and pair of side plates 13, and each wallboard 12 interconnects with each side plate 13, and on each wallboard 12, offers a through hole 14 of mutual correspondence.

Movable member 20 comprises a body of rod 21 and a block 22, at the zone line of the body of rod 21, offer separate a pair of slot 211, end forms a thread segment 212, this body of rod 21 be cross-under in aforementioned through-hole 14 and relatively box body 10 as linearity, move forward and backward.It is one stepped that block 22 is roughly, it has a stopper section 221, separately on the block 22 of stopper section 221 sides, offer a perforation 222 and be provided with one first screw 223, this block 22 is to utilize perforation 222 to be socketed in the body of rod 21, and lock at the thread segment 212 of the body of rod 21 by nut, and block 22 is exposed in the space outerpace of wallboard 12.In addition, the movable member 20 of the present embodiment also comprises a pair of back-moving spring 23,23 ', this is that elastic clip is pulled between block 30 and the medial surface of wallboard 12 (consulting shown in Fig. 1) respectively to back-moving spring 23,23 ' so that block 30 after external force discharges automatically reversion to position placed in the middle originally.

The block 30 of the present embodiment is roughly octagon, but this shape is not limited, it has two pairs of oblique planes 31, and on block 30, offer the axis hole 32 running through, this block 30 is to be socketed in after the aforementioned body of rod 21 with axis hole 32, again respectively with the corresponding aforementioned slot 211 position snappings of a clasp 24, thereby move to follow the body of rod 21 middle that makes block 30 be fixed on the body of rod 21; Aforesaid back-moving spring 23,23 ' is that elastic clip is pulled between the side of block 30 and the medial surface of aforementioned wallboard 12 again.

Each switch 40,40 ' is fixed in the inner space of box body 10 corresponding to the position of block 30, each switch 40,40 ' has respectively for block 30 to be touched and produces the trigger unit 41,41 ' of electric signal, and each trigger unit 41,41 ' lays respectively at the forward and backward two-phase heterodoxy of block 21 mobile routes.

Refer to shown in Fig. 3 and Fig. 4, take-up mechanism 50 mainly comprises a pedestal 51, a reel 52, a volute spring 53 and a line body 54, this pedestal 51 is mainly consisted of coverboard 512 on coverboard 511 and once, at lower coverboard 511 middle positions, be extended with a projection 513, separately in projection 513 centers, be provided with a profile groove 514, upper coverboard 512 and lower coverboard 511 are to be fixed together by the solid assembly of the spiral shells such as screw, and in the both sides of pedestal 51, be provided with a post hole 515 and a screw 516, separately at the pedestal 51 of corresponding projection 513, be provided with a through wires hole 517.

Reel 52 is to be articulated in projection 513 and to be located in pedestal 51 inside, 522, the interior ring that this reel 52 is mainly formed on foreign steamer 521 inner spaces by a foreign steamer 521 and interval forms, in the upper and lower parts of foreign steamer 521, protruded out respectively a flange 523, in case principal vertical line body 54 comes off from foreign steamer 521,522, interior ring is consisted of three arc plates.

Volute spring 53, by by the bending coiling and molding of sheet metal, forms an interpolating unit 531 at the middle position of this volute spring 53, and forms a hook part 532 in the end of its outer peripheral edges; Volute spring 53 is to be installed with in the inner space of interior ring 522, and penetrates the profile groove 514 of projection 513 and fix with interpolating

unit

531, and 532 of hook parts are to hook to be located on interior ring 522.

One end of line body 54 penetrates and is fixed on reel 52 from aforementioned through wires hole 517, and the other end of line body 54 is screwed in aforementioned the first screw 223 by screw and is fixed on (as shown in Figure 1) on block 22.

Refer to shown in Fig. 5 and Fig. 6, stroke restricting means 1 of the present invention is to be applied on a linear electrical cylinder 8, this electric cylinder 8 comprises a support 81, one motor 82, one transmission mechanism 83, one stationary pipes 84 and a telescoping tube 85 (as shown in Figure 1), motor 82 and stationary pipes 84 are fixed on support 81 and are roughly a L word shape, transmission mechanism 83 has a driving screw 831, one end of driving screw 831 is placed in support 81 and by worm and wormwheel group by motor 82 rotation that drives, telescoping tube 85 comprises an inner tube 852 and an outer tube 851, outer tube 851 is the outer peripheral edges that are socketed in stationary pipes 84, inner tube 852 has and be mutually a spirally connected nut 853 of transmission of aforementioned driving screw 831, and be installed in the inner space of stationary pipes 84, inner tube 852 and outer tube 851 be affixed by an end plate 854 and together with interlock.During combination, be to wear box body 10 and be fixed on (as shown in Figure 1) on support 81 with bolt, and by each switch 40,40 ' electric connection motor 82 (scheming not shown).

In addition, refer to shown in Fig. 3 and Fig. 6, take-up mechanism 50 of the present invention also comprises a guide pillar 55 and an adjustment screw rod 56, and end plate 854 other ends that one end of guide pillar 55 is fixed on telescoping tube 85 pass aforesaid post hole 515, and adjusting screw rod 56 and guide pillar 55 is to be parallel relation configuration.Adjust screw rod 56 and wear the end plate 854 of telescoping tube 85 and be screwed onto in the screw 516 of pedestal 51, so, can to the shift motion of telescoping tube 85, finely tune operation in outside.

Refer to shown in Fig. 7, during use, when in the process of telescoping tube 85 inside retractions, reel 52 is activated by the elastic force of volute spring 53, and military order reel 52 produces counterclockwise rotation and line body 54 is furled to action; In addition in the inside retraction of telescoping tube 85 during to extreme position, that the stopper section 221 that presses block 22 with the end of nut 853 moves inward, with the body of rod 20, drive block 30 to move together, and with the oblique plane 31 at block 30 rears, the trigger unit 41 of aforementioned switches 40 is touched and pressed, so can make the motor 82 being electrically connected with switch 40 stop start, and make telescoping tube 85 stop continuing the action of retraction.

Refer to shown in Fig. 8, otherwise, when in the process that telescoping tube 85 outwards protrudes out, take-up mechanism 50 is to be fixed on the end plate 854 of telescoping tube 85, by follow telescoping tube 85 start and outwardly sidesway go out, now reel 52 is subject to pulling of line body 54 and does unwrapping wire action by generation clockwise direction rotation and to line body 54; In addition when telescoping tube 85 convexes extend extreme position, line body 54 is stretched just completely, after telescoping tube 85 continues to shift out outwardly, to pull the body of rod 20 outwards to move together with block 30 with line body 50, and with the oblique plane 31 in block 30 fronts, the trigger unit 41 ' of aforementioned switches 40 ' is touched and pressed, so, can make the motor 82 being electrically connected with switch 40 ' stop start, and make telescoping tube 85 stop the action that continues to shift out.

Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.

Claims

1. an electric cylinder stroke restricting means, described electric cylinder comprises a support and a telescoping tube, it is characterized in that, the trip restraint device comprises:

One box body, is fixed on described support, and this box body has a wallboard, at this wallboard, offers a through hole;

One movable member, comprises this through hole of cross-under and can make the body of rod moving relative to this box body;

One block, is fixed in this body of rod;

Pair of switches, to being fixed on this box body in block position, each this switch has a trigger unit that produces electric signal for this block touching, and respectively this trigger unit is positioned at respectively the two-phase heterodoxy of this block mobile route; And

One take-up mechanism, is placed in described telescoping tube and follows movement, and this take-up mechanism comprises a line body, and one end of this line body is connected to this movable member;

The inside retraction of wherein said telescoping tube promotes this body of rod during to extreme position and moves together with this block, this block will touching this trigger unit wherein and make described telescoping tube stop retracting; When described telescoping tube convex extends extreme position, with this line body, pull this body of rod to move together with this block, this block will touch another this trigger unit and make described telescoping tube stop shifting out.

2. electric cylinder stroke restricting means according to claim 1, is characterized in that, this movable member also comprises a block that is connected to this body of rod and is formed at this box body outside, and this block has for the described telescoping tube stopper section pressing of retracting.

3. electric cylinder stroke restricting means according to claim 1, is characterized in that, this body of rod offers a pair of slot, and this block is provided with an axis hole, with this axis hole, is socketed this body of rod, more respectively with a clasp to should slot snapping and locate this block.

4. electric cylinder stroke restricting means according to claim 1, is characterized in that, this block has a pair of oblique plane, and with this oblique plane, this trigger unit is touched and pressed.

5. electric cylinder stroke restricting means according to claim 1, is characterized in that, movable member also comprises a pair of back-moving spring, and this is pulled between this block and this wallboard by elastic clip respectively to back-moving spring.

6. electric cylinder stroke restricting means according to claim 1, it is characterized in that, this take-up mechanism also comprises a pedestal, a reel and a volute spring, this pedestal is placed in described telescoping tube, this pedestal is extended with a projection, and this reel is articulated on this projection, and one end of this volute spring is fixed on this projection, the other end connects this reel, and this line body is wound around and furls with this spiral crop rotation.

7. electric cylinder stroke restricting means according to claim 6, it is characterized in that, this pedestal comprise coverboard with to coverboard on should lower casing plate be connected, this projection extends from this lower coverboard, this reel is installed with on this in coverboard and this lower coverboard.

8. electric cylinder stroke restricting means according to claim 7, is characterized in that, this pedestal is provided with a through wires hole, and this line body passes and be fixed on this movable member from this through wires hole.

9. electric cylinder stroke restricting means according to claim 6, is characterized in that, also comprises an adjustment screw rod, and this pedestal is provided with a screw, and described telescoping tube has an end plate, and this adjustment screw rod wears this end plate and is screwed onto in this screw.

10. electric cylinder stroke restricting means according to claim 9, is characterized in that, also comprises a guide pillar, and this pedestal is provided with a post hole, and one end of this guide pillar is fixed on this post hole of cross-under of this end plate other end, and this adjustment screw rod and this guide pillar are configured in parallel.

11. electric cylinder stroke restricting means according to claim 6, it is characterized in that, this projection is provided with a profile groove, this reel has an interior ring, the central authorities of this volute spring form an interpolating unit, outer peripheral edges and form a hook part, this interpolating unit penetrates this profile groove and fixes, and this hook part hooks and is located on this interior ring.

12. electric cylinder stroke restricting means according to claim 11, is characterized in that, this reel also has and is formed on the outside foreign steamer of this interior ring, and this foreign steamer is wound around for this line body, and at the upper and lower flange that protruded out respectively of this foreign steamer.