CN1015354B

CN1015354B - Push actuator

Info

Publication number: CN1015354B
Application number: CN89100603A
Authority: CN
Inventors: 皮埃尔·加农; 皮埃尔·拉福雷斯特
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-02-02
Filing date: 1989-01-30
Publication date: 1992-02-05
Also published as: CN1037126A; EP0326910A1; DE68900261D1; EP0326910B1; JPH01288599A; AU2887289A; BR8900438A; JP2566161B2; AU602624B2; RU1836283C; ATE67464T1

Abstract

This telescopic tube is formed of a first and of a second continuous bands wound in a spiral and in a helix, respectively, with the turns of each band lying flat against each other in the retracted position of the tube. The turns of the respective bands are normal to one another. To extend the tube, the turns of the first band are spaced from each other, and the turns of the second band are inserted between the spaced turns of the first band, so as to act as spacers for the latter turns. A mechanism is described to cause extension and retraction of the tube which is mainly used as a push actuator.

Description

Push actuator

The present invention is relevant with telescopic pipe, the concrete relevant application of making push actuator.

The telescoping tube type single acting oil cylinder can be thought of as ejector.When the flexible pipeline section of this oil cylinder is regained, because the hydraulic actuating cylinder telescopic section must be restricted to minimum longitudinal length, so increasing of pipeline section number has actual restriction.Therefore, when this oil cylinder shortens, be decided by the stroke size of requirement; But it is important point that minimum length is arranged.As weight lifting when machinery, when for example using the ground plate portion of some this oil cylinder liftings theatre scene, must excavated earth to hold the bottom of this oil cylinder.

It is found that in some place ground water elevation is not allowed and done this excavation.Therefore in this special theatre occasion or some other occasion,, require to be provided with a kind of push lifting device, when regaining, only account for the length of a minimum with respect to its extended travel because free space is limited.

General objects of the present invention is to propose a kind of telescopic pipe, gives regularly at extended travel, only accounts for the length of a minimum after the withdrawal.

Another object of the present invention is to propose a telescopic pipe as push lifting device, simple physical construction is arranged, and can send very large thrust.

Another purpose of the present invention is to propose a kind of push actuator, is specially the lifting device or the jack that are used for the big load of lifting.

A kind of push actuator as weight lifting machinery according to the present invention comprises: a columniform swivel, and it is driven around a vertical substantially central axis by an actuating device and rotates on a base; The horizontal twist up of belt, its bung flange is laterally parallel with described central axis, and at retrieving position, its bung flange is intussusception layer by layer, and when reaching extended position, its bung flange forms a spiral around described axis, and it is tubular that bung flange radially uniformly-spaced leaves formation; A circulating storage case is used to hold the withdrawal part of described belt, with described central axis coaxial line and can rotate freely with respect to described swivel and base; It is characterized in that described push lifting device also comprises a level band, it is around described central axis twist up, and bung flange laterally vertical with described central axis can be retracted back to a stacked position, make its bung flange flat mutually folded, its bung flange has spacing along this axis direction during stretching, extension; Escapement comprises one group of roller that is installed on the described swivel; Its at least one whole bung flange along the spiral path of described level band is arranged, contact with two of described level band adjacent bung flanges, along with the rotation of swivel, the last bung flange of above-mentioned two adjacent bung flanges of supporting level band, and the described bung flange of going up is separated with adjacent bung flange down; Guiding device radially is inserted into described belt between two spaced bung flanges of described level band and keeps described belt on described level band, and so belt forms the distance piece of level band; Registration device is contacted with the bung flange of described belt by the supporting of the bung flange of described level band, with the bung flange located lateral of the bung flange and the level band of belt.

In one embodiment of the invention, this actuating device has a power operated swivel, around this line of centers rotation, centers on the level band of regaining on a base.This bearing set is fixed on the inboard of this swivel, and the withdrawal of this belt part is by the outside carrying of this swivel.This guiding device is installed on the outside of this swivel.There is registration device to be installed on the bung flange of level band, can be by the bung flange contact of belt, with bung flange located lateral on the bung flange of level band of belt.

In one second embodiment, two winding and bearing set all are placed on the outside of power operated swivel.

Because push actuator has in the present invention increased the level band, adjacent two bung flanges of level band are the double-tee assembly set with the cross section that is combined to form that is clipped in the bung flange of belt therebetween, and it has very high stability, and can support very large load.And the length when push actuator of the present invention is regained with two bands has been compared very large trip distance.

Fig. 1 is the seemingly forward sight of two push actuator of jack that is used for the tableland lifting such as theatre scene part;

Fig. 2 is the forward sight that the partial vertical section is arranged of push actuator first scheme, shows it near the position of regaining fully, analyses and observe along 2-2 line observation among Fig. 3;

Fig. 3 is the section of overlooking of push actuator among Fig. 2;

Fig. 4 is for vertically to analyse and observe along the part of 4-4 line among Fig. 2;

Fig. 5 is in scheme of horizontal winding, is inserted in the vertical winding between two bung flanges, shows the expansion of its longitudinal profile forward sight;

Fig. 6 vertically analyses and observe for the push actuator alternative plan;

Fig. 7 is the section of overlooking of push actuator among Fig. 6;

Fig. 8 analyses and observe for the belt assembly set, and the level band is another embodiment.

Whole similar elements are represented with the identical number of marking on a map in the accompanying drawing.

Fig. 1 shows two jacks of the present invention, and it is whole represents that its lower end is fixing on ground 12 with numbers 10, and the upper end is fixed on tableland 14.Platform 14 can be the part of theatre scene, at this moment need establish some jack synchronous liftings tableland.

Referring to Fig. 2, each jack 10 of first embodiment has an annular base 16, with L shaped ground heel piece 18 and nut 20, or other suitable anchor log grapplings on ground 12.

Swivel 22 forms are a cylinder, and a radially overhanging following bead 24 is arranged, and utilize antifriction-bearing box 26 to rotate on base 16, and ball is embedded in the V-shaped groove of base 16 and following bead 24.So swivel 22 can be around the axis rotation of base 16 and swivel 22.The wholecircle week of following bead 24 upward form the gear teeth 28 and driven wheel 30(and see Fig. 3) engagement, gear 30 usefulness such as reversible HM Hydraulic Motor (not shown)s etc. suitably driving engine are done forward and reverse driving.

One first continuous circular shape band 32 is being referred to as the level band with regard to its special-purpose hereinafter, and coiling, its external diameter are fit to be embedded in swivel 22 and the base 16.This horizontal endless belt raises in succession one by one, forms spacing betwixt.The lower end of level band 32 simply is placed on base plate or the ground G, and the device that last front end 34 usefulness are not shown is fixed on the downside in tableland 14.

One second winding 36 is called belt in above-mentioned special-purpose, press spiral wound, this band is continuous long, put into the circulating storage case 38 on swivel 22 outsides when nestable, hutch waits the L bracket 40(of angular distance to see Fig. 2 and 3 with three) supporting, with respect to this swivel rotation, support 40 usefulness bolts 42 are fixed on the outside of swivel 22, establish an idler roller 44 on the support outer end, support that hutch 38 rotates.Support 40 also can be fixed on the ground G or on the base 16.

As shown in Figure 2, the minimum diameter of coiling that obviously visible vertical volume 36 forms, greater than the external diameter of horizontal winding 32, therefore when the horizontal roll tape base originally stacked fully, maybe when it was stretched, belt all left with the level band.The radial outer end of belt 36 does not need with hutch 38 fixing.The radially Inner Front End of belt 36 by the rectangular opening on the swivel 22 46, enters swivel, and width reduces gradually, shown among Fig. 2 48, uses proper device, and is such as the element 50 in I-shaped cross section, fixing on the bottom side in tableland 40.Front end 48 is inserted in radially between the inward flange of element 50, and element 50 narrows down in the vertical gradually, and is similar to front end 48, and directly fixing on the bottom side in tableland 14.Therefore, though vertical winding 36 as shown, and still keeps the tableland level along spiraling on the screw.

Swivel 22 is provided with one group of equally spaced idler roller 52 along its inside face, respectively is installed on the horizontal shaft 54, fixes with nut 56 and swivel.Idler roller 52 roughly equidistantly is provided with on week at the wholecircle of swivel 22 inboards, and is rolled into spiral by the requirement pitch after level band 32 and belt 36 combinations.As shown in Figure 2, guide reel 52A aligns with elongated hole 46 in the vertical, and its degree of dip is consistent with above-mentioned pitch.Tail roller 52B is in the vertical direction of guide reel 52A, and spacing is arranged.

Be understood that when swivel 22 on the direction in lifting tableland 14, during along Fig. 1 arrow 58 rotation, idler roller 52 rolls (seeing Fig. 2 and 4) below level band 32 bung flange radially outward edges, and this bung flange is separated with adjacent following bung flange.Simultaneously, the belt 36 that enters hole 46 is clipped between adjacent two bung flanges of level band 32 by the radially inwardly guiding of the interior plane surface of roller 52.When swivel along with the rotation of the spiral of swivel coaxial line, and when making roller 52 rotations, level band 32 is raised, vertical volume inserts between the adjacent bung flange of level band gradually, constitutes a kind of tubular or cylindricality gradually.As shown in Figure 2, because the weight of level band on the insertion point causes gap 60 at this point, make belt be convenient to insert.

Being provided with device correctly locatees belt between the adjacent bung flange of level band.These devices more clear illustrating in Fig. 4 and 5.The calm (see figure 2) that stacks when simultaneously, these devices are regained the level band.These registration devices have some column caps 62, force fit in some of one group of corresponding equidistant through hole 64 on level band 32, and these through holes have identical distance with the outer rim of level band 32.As shown in Figure 5, column cap 62 has some upwards, and remaining is downward; So just, make belt 36 against this column cap respectively, with the last lower edge location of belt 36.

Do not insert column cap in some through hole 64, just can hold the column cap on another adjacent bung flange when the level band is regained, the outer teat of column cap 62 is no longer than the thickness of level band.

According to this method, can stack the level band is calm, make and in stand-by state, account for minimum height.As shown in Figure 4, adjacent two bung flanges of level band 32 and the combination that is clipped in belt 36 bung flanges therebetween, forming substantially is the I-shaped cross-section.The assembly set that forms is very firm, can support very large load, and at axis very high stability is arranged laterally.Depend on two with 32 and 36 length, the length when push actuator of the present invention and two bands are regained relatively can have very large trip distance.

Preferably belt is through giving rolling, and the arc radius when loosening approximates the tubular radius after the combination.This helps belt is inserted between the bung flange of level band.

Hutch 38 can rotate freely around tubular, and therefore, though the internal diameter varies of coiling that belt forms in case 38, vertical winding can be put in case or take out.

Fig. 6 and 7 shows the present invention second and desirable scheme.In addition, Fig. 8 shows belt in the desirable embodiment of level band positioning means for positioning transversely placed in the middle.Registration device shown in Figure 8, it is designed to replace the locating dowel pin 62 in insertion level band shown in Figure 5 32 holes 64.Improved registration device only has the succeeding vat of making up and down 70 on level band 72 corresponding main surfaces.Groove is provided with on the width of level band 72 between two parties, has coaxial line and same length with level.Therefore, groove 70 can be used for holding the longitudinal edge of belt 74, it is correctly located on level band 72, and stop in the horizontal.

This modified version can be used for the device of Fig. 1 to 4 and 6 and 7.Telescopic pipe shown in Fig. 6 and 7 has columnar base 76, and is fixing on base plate 78.Swivel 80 usefulness cylinder bases 76 are made rotation by 82 of ball bearing units.Swivel 80 has a cylindrical wall 84 and an end disc 86 to make force fit.

The motor that swivel 80 usefulness are not shown in the figures drives by toothed chain 88 and gear 90, and gear wheel shaft 92 is fixed on the bottom side of disk 86.Toothed chain 88 passes from the hole 94 of cylinder base 76.When the level band is regained, there are some bung flanges to overlay and are fixed on the bead radially overhanging on the base 76 96.So level band 72 is coiled in the outside of swivel 80.

There are some rollers 98 to be installed near these swivel 80 outside upper limbs, around the downward-sloping diametrically axis that forms by binding bolt 100.Roller 98 is a conical butt, with the transverse horizontal position of the axis normal of swivel 80 on, a bung flange of held water flat rubber belting 72.Each roller 98 has a taper bead 102, the interior longitudinal edge of exposure level band 72, with this band with swivel fixed in.

Roller 98 is arranged in spiral on the swivel one whole circle, and when cylindricality or tubular rising, the following preceding deflector roll relative with swivel is illustrated as 98A, and the highest tail roller is 98B.

Belt 74 coileds are coiled, and are 104 among the figure, are placed in the circulating storage case 106 that rotates freely on bogie wheel 107,108 and 109, and the upright arm 110 of wheel 107,108 and 109 usefulness is supported, the lower end of upright arm 110 is fixing in the outside and the bead 96 of level band 72.The diameter of circulating storage case 106 is only a little greater than the diameter of level band 72, therefore the level band is freely passed through in hutch 106.The installation of hutch makes it freely to center on tubular or the tubular rotation.Belt 74 gives rolling or gives setting, the tubular after relaxation state arc lower radius approximates assembling or the radius of cylindricality.With coiling 104 outmost turns from upwards guiding of hutch, radially move inwards along a helical, be inserted between adjacent two bung flanges of level band 72, belt by with the fixing support 114 of swivel 80 on make the deflector roll 112 guiding (see figure 7)s of rotation.Deflector roll 112 rotates around the axle 116 with swivel 80 parallel axes, and deflector roll is pressed on the outside face of belt 74, is pressed between adjacent two bung flanges of level band 72.

Bar 118 is also fixing, radially overhanging on swivel 80, is about to begin rising portion in the outmost turns of coiling, be pressed in coil 104 above.When cylindricality was regained, bar 118 was used for the bung flange of belt 74 is returned in hutch 106 correct nestable positions.Deflector roll 112 correct guiding belts 74 embed in the groove 70 of level band 72 adjacent bung flanges.

The cylindricality top can use that to go up a fixing pressing plate 120 of circle most spacing with belt 74, and this goes up circle most is wedge shape, makes plate 120 and cylindricality or tubular axis normal.

Claims

1, a kind of push actuator as weight lifting machinery comprises: a columniform swivel, and it is driven around a vertical substantially central axis by an actuating device and rotates on a base; The horizontal twist up of belt, its bung flange is laterally parallel with described central axis, and at retrieving position, its bung flange is intussusception layer by layer, and when reaching extended position, its bung flange forms a spiral around described axis, and it is tubular that bung flange radially uniformly-spaced leaves formation; A circulating storage case is used to hold the withdrawal part of described belt, with described central axis coaxial line and can rotate freely with respect to described swivel and base; It is characterized in that: described push lifting device also comprises a level band, it is around described central axis twist up, and bung flange laterally vertical with described central axis can be retracted back to a stacked position, make its bung flange flat mutually folded, its bung flange has spacing along this axis direction during stretching, extension; Escapement comprises one group of roller that is installed on the described swivel, its at least one whole bung flange along the spiral path of described level band is arranged, contact with two of described level band adjacent bung flanges, rotation along with swivel, the last bung flange of above-mentioned two adjacent bung flanges of supporting level band, and the described bung flange of going up is separated with adjacent bung flange down; Guiding device radially is inserted into described belt between two spaced bung flanges of described level band and keeps described belt on described level band, and so belt forms the distance piece of level band; Registration device is contacted with the bung flange of described belt by the supporting of the bung flange of described level band, with the bung flange located lateral of the bung flange and the level band of belt.

2, push actuator according to claim 1 is characterized in that, described registration device is a pin, and it is overhanging with roughly the same interval from the bung flange surface of level band, and can with the bung flange edge contact of belt.

3, push actuator according to claim 2, it is characterized in that, described registration device comprises first group of pin stretching out from a surface of level band and the second group of pin that stretches out from the apparent surface on the described surface of level band, thereby the bung flange of belt contacts with described pin with its two longitudinal edge.

4, push actuator according to claim 3 is characterized in that, described level band further comprises one group of through hole and described pin aligning, and when the bung flange of level band was regained, each bung flange pasted folded mutually, and pin inserts in the hole.

5, push actuator according to claim 1 is characterized in that, the groove of making is gone up at least one surface that described registration device is included on the described level band, and described groove and level band coaxial line are used to hold the longitudinal edge of described belt with the length setting.

6, push actuator according to claim 5, it is characterized in that described registration device is to be included in second groove that another surface of described level band go up to make, itself and the same length of described level band coaxial line, and be provided with between two parties along the level band, be used to hold another longitudinal edge of belt.

7, push actuator according to claim 1 is characterized in that described belt and hutch thereof are arranged on the radial outside of described level band, and described level band is positioned at the radial outside of described swivel.

8, push actuator according to claim 1 is characterized in that described rotation position is between described level band and the described hutch that holds belt.

9, push actuator according to claim 8, it is characterized in that described one group of roller installation and be bearing in described swivel inboard, described guiding device is included in the perforate on the described swivel, described belt passes through described aperture to stretching inwards from described hutch, each roller of described one group of roller has an inner radial surface, and it constitutes another part of described guiding device, belt is directly pushed inward and keep belt be placed on the level band above.

10, push actuator according to claim 7, it is characterized in that described one group of roller installs and be bearing in the outside of described swivel, described guiding device comprises a deflector roll by the outside supporting of swivel, contact with the radially-outer surface of described belt, belt is radially inserted between two spaced bung flanges of described level band inwards.

11, push actuator according to claim 10, it is characterized in that described registration device comprises the groove on two opposite major surfaces that are positioned at described level band, two groove coaxial lines, same length, be provided with between two parties along the level band, be used to hold the longitudinal edge of described belt, keep longitudinal edge to be positioned at position placed in the middle on the level band.

12, push actuator according to claim 11 has an arc radius when it is characterized in that described not tensioning of belt and equates with formed pipe radius after its assembling.