SE465888B

SE465888B - Brake arrangement for operating device for linear movement

Info

Publication number: SE465888B
Application number: SE9001122A
Authority: SE
Inventors: Bo Granbom
Original assignee: Bo Granbom
Priority date: 1990-03-28
Filing date: 1990-03-28
Publication date: 1991-11-11
Also published as: SE9001122L; SE9001122D0

Abstract

Brake arrangement for an operating device for linear movement consisting of a cylinder 1 and a piston which is movable therein, a rail 3 fastened on the outside of the cylinder 1 and parallel to the axis of the latter being arranged along essentially the entire stroke of the piston, which rail is provided with sliding surfaces 8 formed on opposite sides, and with a cavity which extends inside and along the rail, and also a slide provided with sliding blocks 15, which can move along the rail, is guided linearly by the sliding surfaces 8 and is connected to a driver 2 connected to the piston. In this connection, a duct 10 is arranged along the rail 3, which duct, starting from the cavity 10, opens in one side of the rail between its sliding surfaces 8, as a result of which the rail has two legs, at least one of which can act resiliently in the direction transverse to the cylinder axis and with one surface can interact with a brake body 21 which is mounted on the slide and provided with a brake surface 22, depending on the pressure prevailing in the cavity. <IMAGE>

Description

15 20 25 30 35 40 465 888 bringad medbringare 2 sträcker sig. Slitsen avtätas med hjälp av ett stàlband. Cylindern kan naturligtvis vara av annan typ och utgör i sig här ej någon del av uppfinningen. 15 20 25 30 35 40 465 888 brought carrier 2 extends. The slot is sealed with a steel strip. The cylinder can of course be of another type and does not in itself form part of the invention.

Pa sidan av cylindern och parallellt med dennas axel är en skena 3 fastsatt med hjälp av parallella bommar 4 vilka griper in i motsvarande parallella underskurna spar 5 i cylin- dermanteln. Skenan 3 làses vid cylindern med hjälp av kil- formade organ 6, vilka med sina sneda ytor anligger dels mot cylinderns utsida och dels emot ytor hos skenan 3 och vilka medelst skruvar 7 läses mot varandra. Ej heller infästningen av skenan utgör i sig någon del av själva uppfinningen. In- fästningen kan naturligtvis ske på andra sätt.On the side of the cylinder and parallel to its axis, a rail 3 is fixed by means of parallel bars 4 which engage in corresponding parallel undercut grooves 5 in the cylinder shell. The rail 3 is locked to the cylinder by means of wedge-shaped members 6, which with their oblique surfaces abut partly against the outside of the cylinder and partly against surfaces of the rail 3 and which are read against each other by means of screws 7. Nor does the attachment of the rail in itself form any part of the invention itself. The attachment can of course take place in other ways.

Skenan 3 är i det visade exemplet försedd med pà motstå- ende sidor, sett i snitt, plana, i vinkel mot varandra anord- nade glidytor 8. Skenan uppvisar vidare en inuti och längs skenan sig sträckande hålighet 9, vilken medelst en kanal 10 är öppen mot skenans 3 plana utsida, ungefär mittemellan glidytorna 8. Medelst hàligheten 9 och kanalen 10 bildar skenan två skänklar 11, vilka med hänsyn till materialegen- skaperna i skenan kan fjädra i riktning mot och fràn cylinder- axeln, dvs. i figurerna uppàt och nedåt i papperets plan.In the example shown, the rail 3 is provided with sliding surfaces 8 arranged on opposite sides, seen in section, flat, at an angle to each other. The rail further has a cavity 9 extending inside and along the rail, which by means of a channel 10 is open to the flat outside of the rail 3, approximately midway between the sliding surfaces 8. By means of the cavity 9 and the channel 10, the rail forms two legs 11, which with regard to the material properties of the rail can spring in the direction of and from the cylinder axis, ie. in the figures up and down in the plane of the paper.

Manövreringen av skänklarna sker genom att ett tryck appli- ceras i hàligheten 9, vilket kan ske genom att denna exempel- vis upptar en slang (ej visad), vilken trycksättas medelst luft. 12 betecknar ett skyddande band, löst anbringat i kanal- en för att tillåta skänklarna att fjädra och avskilja hàl- rummet 9 fràn kanalen 10.The actuation of the legs takes place by applying a pressure in the cavity 9, which can be done by this, for example, occupying a hose (not shown), which is pressurized by means of air. 12 denotes a protective band loosely attached to the channel to allow the legs to spring and separate the cavity 9 from the channel 10.

En vid medbringaren 2 anordnad slid 14 är utformad med glidskor 15 för samverkan med skenans 3 glidytor 8 för upp- bärande och styrande av sliden 14, vilken genom sin samman- koppling med kolvens medbringare 2 förflyttas fram och åter utefter skenan 3.A slide 14 arranged at the carrier 2 is formed with sliding shoes 15 for co-operation with the sliding surfaces 8 of the rail 3 for supporting and guiding the slide 14, which by its connection with the piston 2 of the piston is moved back and forth along the rail 3.

Sliden 14 är försedd med en bromskropp 21, som är fast- satt vid sliden och med en del sträcker sig ned i kanalen 10.The slide 14 is provided with a brake body 21, which is attached to the slide and with a part extending down into the channel 10.

Bromskroppen uppvisar två från varandra vända bromsytor 22, vilka samverkar med skänklarnas 11 kanalen 10 begränsande ytor.The brake body has two braking surfaces 22 facing away from each other, which co-operate with the limiting surfaces 10 of the channel 10 of the legs 11.

Vid passiv bromsning, dvs. när något tryck ej föreligger i hàligheten 9, hålls skänklarnas nämnda kanter, pà grund av fjäderverkan hos skänklarna 11, emot bromskroppens 21 broms- *f 10 15 20 25 30 465 888 ytor 22, därmed bromsande sliden 14 vid skenan 3. Trycksätts hàligheten 9 kommer skänklarna 11 att fjädra utàt med rörelse- komposanter riktade, sett i figuren, både uppåt och àt resp. sida. Detta innebär att skänklarnas nämnda kanter fjärmas fràn bromsytorna 22. Bromsningen upphör.In case of passive braking, ie. when no pressure is present in the cavity 9, the said edges of the legs, due to the spring action of the legs 11, are held against the braking surface 22 of the brake body 21, thereby braking the slide 14 at the rail 3. The pressure 9 is pressurized the legs 11 will spring outwards with movement components directed, seen in the figure, both upwards and towards resp. page. This means that the said edges of the legs are removed from the braking surfaces 22. Braking ceases.

Lämpligen lutar bromsytorna 22 killikt i förhållande till varandra och är en rad skruvar 23 anordnade, med vars hjälp bromskroppen 21, med motsvarande kilform, kan föras mer eller mindre làngt in i kanalen 10, för att därmed justera bromsverkan och det tryck, som skall tillföras hàligheten 9 för att lossa bromsen.Suitably the brake surfaces 22 are inclined relative to each other and a series of screws 23 are provided, by means of which the brake body 21, with a corresponding wedge shape, can be inserted more or less far into the channel 10, thereby adjusting the braking action and the pressure to be applied. hollow 9 to release the brake.

En positiv bromsning kan erhållas genom att skänklarnas 11 yttre, ytor anordnade pà undersidan av bromskroppen 21. När något sett i figurens övre, kantytor samverka med broms- tryck ej föreligger i hàligheten 9 intar skänklarna det i figuren visade läget, varvid det skall underförstàs, att bromskroppen 21 ej uppvisar någon för bromsning avsedd del, som sträcker sig ned i kanalen 10. När tryck tillföres hålig- heten 9 kommer skänklarna 11 att fjädra ut och med sina övre kantytor pressas mot bromskroppens 21 nedàtriktade bromsytor. Även här kan spelet mellan skänklarnas kantytor och bromskrop- pens bromsytor regleras med hjälp av skruvar 23.A positive braking can be obtained by the outer surfaces of the legs 11 arranged on the underside of the brake body 21. When something seen in the upper, edge surfaces of the figure cooperating with brake pressure does not exist in the cavity 9, the legs assume the position shown in the figure, that the brake body 21 does not have a part intended for braking, which extends down into the channel 10. When pressure is applied to the cavity 9, the legs 11 will spring out and with their upper edge surfaces be pressed against the downwardly directed brake surfaces of the brake body 21. Here, too, the play between the edge surfaces of the legs and the brake surfaces of the brake body can be regulated by means of screws 23.

Det skall underförstàs att uppfinningen kan varieras och modifieras inom ramen för patentkraven med andra former hos glidytor och glidskor och behöver exempelvis kanalen ej an- bringas utefter skenans mitt utan kan kanalen, med upprätt- hållande av principen för den här beskrivna bromsfunktionen, även placeras förskjuten mot en av skenans kanter. Medbringar- en 2 kan vara fixerat fastsatt vid sliden 14, exempelvis medelst en eller flera skruvar eller kan infästningen göras medbringaren upptar endast fjädrande eller "flytande“, dvs. axiella krafter fràn sliden.It is to be understood that the invention may be varied and modified within the scope of the claims by other forms of sliding surfaces and sliding shoes and, for example, the channel need not be fitted along the center of the rail but the channel, while maintaining the principle of braking function described herein, may also be offset. towards one of the edges of the rail. The carrier 2 can be fixedly attached to the slide 14, for example by means of one or more screws, or the attachment can be made. The carrier receives only resilient or "floating", ie axial forces from the slide.

Claims

10 15 20 25 30 465 888 Patent claims

Brake device for actuators for linear movement consisting of a cylinder (1) and a piston movable therein, wherein along the substantially entire stroke of the piston a rail (3) fixed on the outside of the cylinder (1) and arranged parallel to its axis is provided with on sliding surfaces (8) designed on opposite sides and having a cavity extending inside and along the rail, and a slide movable along the rail and slidably guided by the sliding surfaces, connected to a carrier (2) connected to the piston, A channel (10) is arranged along the rail (3), which channel starting from the cavity (10) opens into a side of the rail between its sliding surfaces (8), whereby the rail has two legs of which at least one can spring in the direction across the cylinder shaft and which with a surface can co-operate with a brake body (21) provided with a slide arranged at the slide, depending on the pressure prevailing in the cavity.

Braking device according to claim 1, characterized in that the brake body (21) has a part extending into the channel (10), which cooperates with the surfaces of the opposite leg ends.

Braking device according to claim 1, characterized in that the braking surface of the brake body (21) is located outside at least one leg (11) for co-operation with its outer edge surface.

Brake device according to claims 2 or 3, characterized in that the brake body is adjustable in the direction of and away from said pouring surfaces.

Braking device according to one of the preceding claims, characterized in that the channel (10) is located midway between the sliding surfaces of the rail (3). ix