DE3212695A1 - Hydraulically actuated locking device - Google Patents

Abstract

The device serves for locking a plurality of relatively mobile parts in a plurality of positions, the locking means being actuated via an elastically deformable container filled with hydraulic fluid. The elastic container is enclosed by rigid walls, at least one of which is moved when hydraulic pressure is built up or decreased. A continuous adjustment takes place in the manner of a band brake (Figure 1), a band being placed under prestress around a substantial part of a disc in such a way that a large locking force is produced. If a plurality of locking means are actuated simultaneously, they are all fitted in each case with an elastic container, at least one of which is initially substantially full and the others are substantially empty. <IMAGE>

Description

2 2 2 I '. 13 9 5

Hydraulically operated locking device

The invention relates to a device with several against each other moving parts, the position of which can be locked in several positions to each other, whereby the locking means! by moving at least one at least partially moving; borrowed, rigid wall actuated at least one actuator which is provided with a first elastically deformable container with hydraulic fluid, which has a Connecting line is connected to a pressure-independent volume with a pressure chamber, from which a force is applied the hydraulic fluid can be introduced.

Devices of this type are known in the application of folding furniture from patent DE 3o 13 734, where clamping jaws are hydraulic are pressed against each other. For a secure locking, however, large forces must be applied that an actuation difficult by hand.

This problem is caused by devices according to the German patent application DE 3o 36 216.4 overcome in that the locking takes place by positive locking. Devices of this type can naturally only adopt certain locking positions, i.e. not continuously adjusted.

The first object of the invention is to be a continuous one to create adjustable locking device which has a large locking force with low actuation forces.

In the known devices according to the preamble, separate actuating devices were also used for the locking means intended. This became the technical one in all cases where several locking devices are to be actuated at the same time Effort unnecessarily great.

BADORiGINAL ^00ΡΥ

The invention is based on a further object, the technical To reduce the effort of devices with several locking means actuated at the same time.

The first; The object of the invention is achieved in that the locking means are designed as a disk and band, that the band around a substantial part of the circumference of the disk is laid around that the belt is tensioned by non-hydraulic means and that the belt tension by the first elastic Container of the actuator can be lifted.

The second object of the invention is achieved in that at least two simultaneously actuated locking means are provided that all locking means each with an elastic

at least

Containers are equipped, of which /, un initially essentially filled and the others are essentially empty that the elastic container at least on two opposite Sides are surrounded by rigid walls, each of which at least one is at least partially movable that on the movable rigid wall of the first with hydraulic fluid essentially filled elastic container a force can be introduced that through the introduction of force a part of the in the Hydraulic fluid contained essentially in filled elastic containers is pressed out that the volume of the initially substantially empty elastic container enlarged v / earth, and that thereby the movable rigid walls of the actuating elements with initially moved substantially empty elastic containers and actuated the associated locking means.

The application of force to the movable, rigid wall of the first The substantially filled elastic container can be carried out both by a linear as well as by a rotary movement.

Ha:; im Λπτί icrmitfcl mil the disk; uu; ammonwii kondc tape can in front of t: o i-lhal! he manner as dot wound Keiler Trained J.

COPY BAD ORIGIN

3 -. ■:. .: D α ο

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will,

The device can versctien / the ζ v / ei in the same direction with a spring Has wound parts.

If a rotary movement is to be locked in both directions, two springs wound in opposite directions are used according to the invention provided, which are actuated simultaneously in one embodiment by the movable, rigid wall of the actuating element.

In another preferred embodiment, two actuating elements, each with one, are used to actuate the two springs Fixed and a movable part provided, with a hydraulic fluid between the first fixed and first movable part substantially filled elastic container and between the second fixed and second movable parts a substantially empty resilient container is placed. By exerting a force on the first movable part, it is moved in one direction and at the same time the second movable part in the other direction, so that both springs are actuated v / earth.

It is provided according to the invention that the movement of the movable Parts can be done parallel to the fixed parts or pivoting around a pivot point.

Other objects and advantages of the present invention will become apparent from the following description. A number of exemplary embodiments are explained with reference to the following drawings.

Fig. 1 shows a device according to the invention, in which the locking means are designed as a disk and band.

Fig. 2 shows a device according to the invention with two equal

timely acting locking devices, in which the introduction of tier J Actuating force takes place in the area of a locking means.

COPY BAD ORIGINAL

Fig. 3 shows part of a device in which the Locking via a disc and a coiled spring, which is operated via a rocker arm, the opposite of which End as a movable, rigid wall on top of an element, initially with hydraulic fluid filled elastic container acts.

Fig. 4 shows the other part of the device of Fig. 3, but with the elastic container initially empty.

Fig. 5 shows a device according to the invention with two opposite directions coiled springs, which are operated via: white rocker arms.

In Fig. 5a an actuation of the two rocker arms of Fig. 5 with the aid of a rotatable toggle is shown as an example, the same early one filled with hydraulic fluid in the locked state elastic container is compressed.

Fig. 6 shows a device such as Ficr. 5, but between the ends of the rocker arms opposite from the non-hydraulic means are initially essentially empty elastic ones Container is provided.

Fig. 7a shows the basic arrangement of the non-hydraulic Means opposite ends of the rocker arms of Fig. 5, which when actuated hydraulically in opposite directions Move directions.

Fig. 7b shows another embodiment of Fig. 7a.

FIG. 8a shows a device like FIG. 7a, but with the fixed and moving parts swivel to one another make.

Fig. 8b shows another embodiment of Fig. 3a.

BADORSGiNAL COF

In Fig. 1 a device according to the invention is shown in:

the one disk 52 rotatable about axis 54 opposite a gel I housing 53 is locked in any angular position in the manner of a rope brake. To do this is by a substantial part of the scope A rope 55 or band is put around by disk 52, which is fastened at its end at 56 to the housing 53 / if necessary can several turns can also be provided. The other end of rope 55 is connected at 57 to a lever 58 which is in a Bearing 59 is rotatably mounted with respect to housing 53. The rope 55 can also be designed as a coiled spring.

A spring 6o presses against lever 58, thereby tensioning cable 55 and thus locking disk 52 in relation to housing 53.

In the example shown in FIG. 1, the locking is released by an elastic container 61 which rests on one side against the lever 58 and is delimited at least on the side opposite the lever 58 by a fixed wall 62. The elastic container 61 is hydraulically connected to a pressure chamber (not shown) via a line 61 of constant volume. In Fig. 1, the elastic container 61 is compressed by spring 6o.

The hydraulic fluid is now applied in the pressure chamber (not shown) a force is introduced, the volume of the elastic container 61 is increased via line 63, the shape of which is chosen so that it can only expand in the direction of the lever 58 substantially. Lever 58 is thereby against spring 6o pressed down while the other end 57 moves up and the tension in the rope 55 is released. Washer 52 can now be rotated about axis 54.

Fig. 2 shows an embodiment of the invention in which two rotary movements are to be locked at the same time and the actuation is placed in the area of one locking device is.

COPY BAD ORIGINAL

-A -

Two joints 31 and 32 are indicated, which are, for example, the coaxial joints of a garden lounger, in which the angular position of a head part 33 relative to a middle part 34 can be adjusted. The two joints 31 and 32 are hydraulically connected by a hose 35 which is arranged, for example, in a footrest 36 of the sun lounger.

Head part 33 is in joint 31 with a locking means 37 and in Joint 32 is firmly connected to a locking means 38. Middle part 34 is in hinge 31 with a locking means 39 and in hinge firmly connected with a locking means 4o. The locking means to 4o are designed as disks, which on each other opposite sides are provided with a star toothing.

In the freely movable state, an elastic container 41 is essentially filled with hydraulic fluid, while an elastic one Container 46 is essentially empty.

Joint 31 is shown in the locked state. The locking means 37 and 39 are over the rigid. Walls 4 3 surrounded elastic container 41 and pressed together by a plate 45 which is connected in a rotationally fixed manner to wall 43 and is movable in the axial direction. The pressure force is applied by hand lever 51.

The hydraulic fluid displaced from the elastic container 41 is conducted through hose 35 to the elastic container 46 located in joint 32. Elastic container 4 6 enlarged thereby its volume and presses the locking means 38 and 4o against one another via a plate 47 which is movable in the axial direction. Through this joint 32 is locked at the same time as joint 31 or released again when the hand lever 51 is released.

Joint 32 is shown in the freely rotatable state for a better understanding of the released state of both joints 31 and 32. The locking means 38 and 4o, which are provided with a star toothing, are pushed so far apart by a spring 48 that the teeth are not engaged. At the same time the elastic

BATH ORIGINAL

Container 46, which is surrounded by rigid walls 49, compressed and hydraulic fluid via hose 35 in elastic ' Container 41 flowed back.

In the released state of joint 31, the star toothing of locking means 37 and 39 is also pushed apart by a spring 5o.

In Fig. 3 μηα Fig. 4 a device is shown. where the

which are firmly connected to disks 73 and 74, rotary movements of two rotatable parts 65 and b6 ^ about axes 69 and 7o around relative to the two frames 67 and 68 according to the invention can be locked and released at the same time. It is locked by means of coiled springs 71 and 72, which each interact with a disk 73 and 74, respectively. The one End * of spring 71 is attached to frame 6 7 at 93; likewise, one end of the spring 72 is attached to the frame 68 at 94. The other end 75 or 76 of the coiled springs 71 and 72 is turned in the winding direction by non-hydraulic means -77 and 78, respectively of the springs pressed, whereby in the two parts of the device according to the invention shown in Fig. J and Fig. 4 the locking effect is generated. The locking effect is essential in the winding direction of the springs 71 and 72 shown larger if parts 65 and 66 are to be rotated counterclockwise than clockwise.

To release the lock in both parts of the device at the same time, the push button 79 shown in FIG. 3 is inserted into the Inside of frame 67 pressed and thereby rotated a rocker arm 81 about a pivot point 83.

It is evident that the force to move rocker arms can also be applied by other means, e.g. by an eccentric or a screw.

By the rotary movement of rocker arm 81, an elastic container 85, which in the locked state of the device with hydr likiquid is essentially filled, compressed because he on the opposite side of the lever 81 against a fixed

COPY BAD ORIGINAL

Wall 87 is applied. At the same time, the other arm pushes the lever towards the end 75 of the coiled spring 71, whereby the force of the non-hydraulic means 77 is overcome. Washer 73 and thus part 67 can now easily be rotated in both directions with respect to frame 6 7.

The hydraulic fluid displaced from container 85 is pressed via a line 8o with a pressure-dependent volume into a second elastic container 86, which in the locked state shown in FIG. 4 is initially essentially empty and expands by the displaced hydraulic fluid. The container lies between a fixed Vlana 88 and one arm of a rocker arm 82. As the container 86 expands, the rocker arm 82 is rotated about a fulcrum 84. The other arm of the rocker arm 82 presses against the 3ndo 76 of the spring 72, thereby overcoming the force of the non-hydraulic means 78 and thus releasing the locking of the disc 74 and part 66 relative to the frame

i'If it is desired, the rotary movement of the disc or of the associated part relatively "by frame in both directions locked equally strong. A corresponding device is indicated in the locked state in FIG a part 1o1 is rotatable about an axis 1o2 with respect to a frame 1o3.

firmly connected with part 1o1
Two springs 1o5 and 1o6 wound in opposite directions are wrapped around a disk 1o4. Opposite means that the direction of liickelrichtunqauf the disc 1o4 for the two springs 1o5 and 1o6 are different.

It is also possible to use just one spring that extends from the center to one end in one direction and to its other end in the other RichLui. wrapped and the fastening opposite the dom frame is made in its Mxtte.

BATH ORIGINAL

; : 3 9 5

■ 5 -

The solution of the springs 1o5 and Io6 and thus the locking from part 1o1 towards 1o3 takes place in the 'joreifcs in relation to Fig. 3 described manner, but with two rocker arms 1o7 and

108 are provided which are based on that of non-hydraulic means

109 or 11 o pretensioned spring ends 111 and 112 are effective. the other ends of springs 1o5 and 1o6 are at 113 and 114 am Frame 1o3 attached.

The two rocker arms 1o7 and 1o8 can be actuated via a mechanical linkage (shown in the illustration below). Alternatively, au a wedge must be pressed between them.

In Fig. 5a is indicated as an advantageous solution, as the actuation the rocker arms 1o7 and 1o8 made by a toggle 115 can be actuated, for example, via a rotary lever (not shown) attached to the frame 1o3.

In Fig. 5a is also in the locked state with hydraulic fluid substantially filled hydraulic container 116 shown, which is between the one arm of rocker arm 1o7 and a fixed wall 117 is arranged. If rocker arm 1o7 is moved by turning toggle 115, the hydraulic fluid becomes pressed out of container 116, which is arretie through a line 118 with a pressure-independent volume that is shown in FIG. 6 th state empty elastic container 12o is supplied.

By expanding container 12o, those shown in FIG. 6 become Rocker arms 121 and 122 are pressed apart, the locking with their other arms in the manner described above relieve the load by means of two counter-rotating springs 123 and 124. Through this a part 125 can be freely rotated relative to a frame 126;

7a shows the basic arrangement of the two arms 13o and 13o, which are remote from the non-hydraulic means of the rocker arms 1o7 and 1o8 shown in FIG. 5. Between arm 13o and a fixed wall 132 is a locked state the device is essentially filled with hydraulic fluid elastic container 133 and between arm 131 and a

COPY BAD ORaGiNAL

solid wall 134 is a substantially empty resilient container 135 arranged. The two elastic containers 133 and are connected to one another by a pressure-independent line 136 .

The two elastic containers 133 and 135 can be designed, for example as bellows, that their elastic deformation works almost exclusively in one direction, even without fixed boundary walls except 13o, 131, 132 and 134.

Plastic container 133 can be large enough to allow the liquid displaced from it to be both . elastic container 135 and the elastic container 12o (Fig. 6) fills.

Is now on one arm, e.g. 13o, of one rocker arm exerted a force K, arm 13o moves substantially parallel to the fixed wall 132, the rocker arm 1o7 is rotated and at the same time the elastic container 133 is compressed. the hydraulic fluid forced through line 136 into elastic reservoir 135 expands container 135 and moves arm 131 substantially parallel to fixed wall 124 into the opposite one Direction of arm 13o. As a result, rocker arm 1o8 is also rotated in the opposite direction from rocker arm 1o7, so that both coiled springs 1o5 and 1o6 (Fig. 5) are released.

A variant of the basic arrangement shown in FIG. 7a is shown in FIG. 7b. Here the two act when they act arms 13o moved in the opposite direction by a force K and 131 together with only one solid wall 137. For this it is necessary that the one of the two arms, e.g. 13o, in front of the Paper plane and the other arm, e.g. 131, is arranged behind the paper plane so that they move past each other can.

BA ^ / ORIGINAL

In Fig. 7b, a further elastic container 138 is shown, which is independent of the containers 133 and 135 and via a line 118 with a pressure-independent volume with container 12o (Fig. 6) is connected.

8a and 8b show further basic arrangements of the two remote from the non-hydraulic means Arms 14o and 141 of the rocker arms 1o7 and 1o8 shown in FIG. 5 are shown. They work with the solid walls 142 resp.

143 (Fig. 8a) or in Fig. 8b with a common fixed wall

144 together. Arm 14o is pivoted at -14 5, arm 141 at 146 (Fig. 8a). The common articulation in Fig. 8b is with 147 designated.

If a force K is exerted on arm 14o, a rotary movement takes place around joint 145 and at the same time an elastic container 14 8 is compressed. The displaced liquid v / ill be pressed via a line 149 pressure-independent volume in an elastic container 15o, the first essentially empty \ -n \ 15o container expands and rotates arm 141 to thereby DrehpunJ-146th As explained above, the coiled springs 1o5 and 1o6 (FIG. 5) are released by these two rotary movements.

The variant shown in FIG. 8b functions like that of FIG. 8ε only both arms 14o and 141 work together with a common fixed wall 144 and rotate about a common axis 147. For this purpose, arm 14o and container 148 are in front of the paper plane and arm and container 15o behind the plane of the paper. _;

It is evident that the in Figs. 7a, 7b, 8a and 8b shown basic solutions for actuating an inventive The device can be used in general if, with the aid of a force acting only in one direction, two ent- j opposing parallel or rotary movements are to be produced without the considerable mechanical | Expenditure. '

COPY; BATH ORIGINAL

La-ei
5.4.1982

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Claims (1)

Claims 1.1 Device with several mutually movable dividers: /. whose position can be locked in several positions to one another, the arresting means by the movement ^: at least one at least partially movable, rigid ^1. ' Wall of at least one Botätiqunciselements are each provided with a first with hydraulic fluid elastically deformable container, which is connected via a connection line with a pressure-independent volume of a pressure chamber, from which a KrE can be introduced to: ie hydraulic fluid, thereby geke draws ^. that the locking means are designed as a disc (52) and band (55), - That the band (55) around a substantial part of the Umfar. the disc (52) is lying around, that the band (55) is tensioned by non-hydraulic means (6o) and - That the belt tension can be released by the first elastic container (61) of the actuating element. 2. Device with several mutually movable parts whose position is locked in several positions to one another can be, wherein the locking means by the movement of at least one at least partially movable, more rigid. Wall at least one actuating element is operated which is each provided with a first elastisc deformable container with hydraulic fluid, which has a front connecting line is connected to a pressure independent volume with a pressure chamber, from which a Force can be introduced into the hydraulic fluid, marked by dadurc. COPY BAD ORIGINAL - That at least two locking means (37, 38, 39, 4o; 71, 72, 73, 74; 1o4, 1o5, 1o6, 119, 123, 124) are provided, that all locking means are each equipped with an elastic container (41, 46; 85, 86; 116, 12o; 133, 135, 138; 148, 15o) at least
are equipped, of which / one (41; 85; 116; 133; 138; 148): next is essentially full and the others (46; 86; 12o 135; 15o) are essentially empty, that the elastic container at least on two opposite one another Sides of rigid walls (43, 45, 47, 49; 31, 82, 87, 88; 1o7, 117; 121, 122; 13o, 131, 132, 134, 137; 14a, 141, 142, 143, 144), of which at least one (45, 47; 81, 82; 1o7; 121, 122; 13o, 131; 14o, 141) is at least partially movable, that on the movable rigid wall of the first with hydraulic fluid a force (51; 79; 115; K) can be introduced into a substantially full elastic container, that through the introduction of force a part of the .in the essentially hydraulic fluid contained in filled elastic containers is pressed out, that through the hydraulic fluid that is pressed out the Volume of the initially essentially empty elastic container can be increased, and that thereby d'ie movable rigid walls of the actuating elements are moved with initially essentially empty elastic containers and the associated locking means are actuated (38, 40 _; 72, 74; 123, 124, 119). 3. Apparatus according to claim 2, characterized in that the introduction of force to the movable, rigid wall of the ·;.;. · ;; -. T essentially filled ancient container Curoa the linear movement of a rocker arm or a Drii.vU.nopfes (79) takes place. BATH ORIGINAL _, .. j9b 4. Vorrichtunq according to claim 2, characterized in that the introduction of force on the movable rigid wall de «first substantially filled elastic container; by the rotary movement of a rotary lever (51; 115), a screw or a threaded pin. 5. Apparatus according to claim 1, characterized in that the band is designed as a coiled spring (71, 72; 1o5, 1o6; 123, 124). 6. Apparatus according to claim 2, characterized in that the Arretiermittcl as a disc 173, 74; 1u4; 119) and coiled Spring are formed. 7. Apparatus according to claim 5 or 6, characterized in that the spring dj two parts has the same direction wound. 8. Apparatus according to claim 5 or 6, characterized in that two springs wound in opposite directions (1o5, 1o6; 123, 124) are provided. 9. Apparatus according to claim 8, characterized in that both springs are actuated simultaneously by the movement of the movable rigid wall of the actuating element. 1o. Device according to claim 8, characterized in that that to actuate the two springs (1o5, 1o6) two Operating elements (13o, 131, 132, 134, 137; 14o, 141, 141. 143, 144) each with a fixed (132, 134, 137; 142, -4.1 144) and a movable part (13o, 131; 14o, 141) are provided, that between the first fixed (132, 137; 142, 144) and first movable part (13o; 14o) with hydraulic fluid substantially filled first elastic containers (133; 148) is arranged, BAD ORIGINAL _CO PY ..:;: 6 9 5 - ¹ I- j - that between dom second fixed {134, 137; 143, 144) and second movable part (131; 141) of the first j substantially empty second elastic container (135; 15c is arranged ί - that the operating force the first moving part in di moves in one direction, thereby actuating the first spring (1o5) '-. tigt and hydraulic fluid from the first elastic Container pushes out and at the same time displaced by the Hydraulic fluid expanded the second elastic tank, the second movable part moves in the opposite direction and thereby actuates the second spring (1o6) will. 11. »Device according to claim 1o, characterized in that the moving parts are moved parallel to the fixed parts. 12. The device according to claim 1o, characterized in that the moving parts are hinged to the fixed parts (145, 146, 147) and a pivoting movement in relation to them carry out. 13. The device according to claim 2, characterized in that that two disks (73, 74) rotatable coaxially with respect to a fixed frame (67, 68) are provided, - That around these disks (73, 74) each a wound spring (71, 72) is laid around, one end (93, 94) of which is attached to the frame (67, 68), that the two springs (71, 72) by non-hydraulic means (77, 78) are stretched, that the effect of the non-hydraulic means (77, 78) can be canceled by rocker arms (81, 82), BATH ORIGINAL ...; - 9 5 that the one rocker arm (81) by an externally acting Force (79) is actuated, that this first rocker arm (81) with its arm opposite the non-hydraulic means (77) movable, rigid wall of a first one which is initially essentially filled with hydraulic fluid elastic container (85) provided but actuating element (81, 87) forms, - That this first elastic container (85) has a connecting line (8o) with a pressure-independent volume with a second, initially essentially empty, elastic container (86) is connected, and - That this second elastic container (86) is part of a second actuating element (82, 88) whose movable rigid wall (82) formed by the arm of the second rocker arm (82) opposite the non-hydraulic means (78) will. 14. The device according to claim 2, 1o, 11 or 12, characterized in that that two opposite a fixed frame (1o3, 126) coaxial rotatable disks (1o4, 119) are provided, - That two springs wound in opposite directions (1o5, 1o6, 123, 124) are placed around these discs, one of which End (113, "114, '213, 214) is attached to the frame (1o3, 126), that the springs are tensioned at their other ends by non-hydraulic means (1o9, 11o, 2o9, 21o), that the effect of the non-hydraulic means can be canceled by rocker arms (1o7, 1o8, 121, 122), that one rocker arm (1o7) is actuated by an externally acting force (K, 115), COPY BADORiGlNAL .1 J 2 S2695 that this first rocker arm (1o7) with its arm (1o7, 13o, 14o) a movable, rigid wall one with a initially filled with hydraulic fluid, first elastic container (116, 133, 148) provided actuating element (1o7, 117; 13o, 132; 140, 142) forms, that this first elastic container (116, 133, 148) via connecting lines (118, 136, 149, 218) with pressure-independent Volume with further, to all other rocker arms (121, 122; 131; 141) associated initially essentially empty elastic containers (12o; 135; 15o) is connected, and that these further elastic containers (12o, - 135; 15o) Part of further actuating elements (121, 122; 131, 134, 137; 141, 143, 144) are whose movable, rigid walls (121, 122; 131; 141) by the non-hydraulic means (11o; 2o9, 21o) opposite arms of the further rocker arms are formed. BAD ORIGINAL COPV