SE465889B

SE465889B - Brake arrangement for operating device for linear movement

Info

Publication number: SE465889B
Application number: SE9001123A
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: SE9001123L; SE9001123D0

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 a slide 14 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. The rail 3 has two cavities 9 which extend inside and along the rail and are open by means of a duct 10 on the respective sliding surface 8 thereof, as a result of which the rail 3 has two legs 11 which are resilient in the direction transverse to the cylinder axis and delimit one side of the duct 10. Each leg 11 interacts with a brake body 21 which is mounted on the slide 3 and provided with a brake surface 22. Each cavity 9 can be pressurized in a known manner in order to move said one side of the duct 10. <IMAGE>

Description

15 20 25 30 35 40 465 889 anbringad medbringare 2 sträcker sig. Slitsen avtätas med hjälp av ett stälband. Cylindern kan naturligtvis vara av annan typ och utgör i sig här ej någon del av uppfinningen. 15 20 25 30 35 40 465 889 mounted carrier 2 extends. The slot is sealed with an adhesive tape. The cylinder can of course be of another type and does not in itself form part of the invention.

Pà 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 cylindermanteln. Skenan 3 läses vid cylindern med hjälp av kilformade organ 6, vilka med sina sneda ytor anligger dels emot cylinderns utsida och dels emot ytor hos skenan 3 och vilka medelst skruvar 7 läses mot varandra. Ej heller infäst- ningen av skenan utgör i sig någon del av själva uppfinningen.On the side of the cylinder and parallel to its axis, a rail 3 is fixed by means of parallel booms 4 which engage in corresponding parallel undercut grooves 5 in the cylinder shell. The rail 3 is read at 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.

Infästningen kan naturligtvis ske pä andra sätt.The attachment can of course take place in other ways.

Skenan 3 är försedd med pá motstàende sidor, sett i snitt, plana i vinkel mot varandra anordnade glidytor 8.The rail 3 is provided with sliding surfaces 8 arranged at opposite sides, seen in section.

Skenan uppvisar vidare tvà inuti och längs skenan sig sträck- ande håligheter 9, vilka medelst vardera en kanal 10 är öppen vid resp. glidyta 8. Med hjälp av hàligheterna 9 och kanalerna 10 bildar skenan tvà skänklar 11, vilka med hänsyn till materialegenskaperna i skenan kan fjädra i riktning mot och fràn cylinderaxeln, dvs. i figuren uppåt och nedåt i papperets plan.The rail further has two inside 9 and along the rail extending cavities 9, which by means of each one channel 10 are open at resp. sliding surface 8. By means of the cavities 9 and the channels 10, the rail forms two legs 11, which, with regard to the material properties of the rail, can spring in the direction of and away from the cylinder axis, ie. in the figure up and down in the plane of the paper.

Manövreringen av skänklarna 11 sker genom att ett tryck appliceras i resp. hålighet 9, vilket kan ske genom att denna exempelvis upptar en slang (ej visad), vilken kan trycksättas medelst luft. 13 betecknar ett skyddande band, löst anbringat i kanalen för tillåtande av skänkelns fjädring, och avskil- jande resp. hàlrum 9 från sin kanal 10.The actuation of the legs 11 takes place by applying a pressure in resp. cavity 9, which can be done by this, for example, receiving a hose (not shown), which can be pressurized by means of air. 13 denotes a protective band, loosely mounted in the channel for allowing the suspension of the leg, and separating resp. cavity 9 from its channel 10.

En vid medbringaren 2 anordnad slid 14 är utformad med glidskor 15, vilka i samverkan med skenans 3 glidytor 8 uppbär och styr sliden 14, vilken genom sin sammankoppling med kolv- ens medbringare 2 förflyttas fram och äter utefter skenan 3.A slide 14 arranged at the carrier 2 is formed with sliding shoes 15, which in cooperation with the sliding surfaces 8 of the rail 3 support and guide the slide 14, which by its connection with the piston 2 of the piston is moved forward and eats along the rail 3.

Sliden 14 är försedd med tvà kilformade bromskroppar 21, som medelst vardera en i sliden 14 gängad rad av skruvar 23 (endast tvä syns i figuren) är inställbara med resp. bromsyta relativt skänklarnas 11 nämnda sidor så, att ett för ändamålet lämpligt spel kan upprätthållas mellan resp. bromsyta 22 och skänkelns med denna samverkande yta vid obromsad slid.The slide 14 is provided with two wedge-shaped brake bodies 21, which by means of each a row of screws 23 threaded in the slide 14 (only two can be seen in the figure) are adjustable with resp. braking surface relative to the said sides of the legs 11 so that a game suitable for the purpose can be maintained between resp. brake surface 22 and the leg with this cooperating surface in the case of unbraked slide.

I det visade exemplet vilar resp. bromskropp 21 med en plan, kroppen styrande yta mot en motsvarande yta hos sliden 14, medan bromskroppens 21 sneda yta 22 bildar bromsytan ,V) 70,/ 10 15 20 465 889 ingripande med slidens 14 motsvarande bromsyta.In the example shown, resp. brake body 21 with a flat, body guiding surface against a corresponding surface of the slide 14, while the inclined surface 22 of the brake body 21 forms the brake surface, V) 70, / 10 15 20 465 889 engaging with the corresponding brake surface of the slide 14.

Kortfattat kan funktionen beskrivas enligt följande. När nagot tryck ej föreligger i hàligheterna 9 pressar skänklarna 11 av den inneboende fjäderkraften ytorna emot bromskropparnas 21 resp. bromsyta 22 och är därmed sliden 14 bromsad i ett bestämt läge. Införes tryck i hàligheterna, kommer dessa att pressa ut skänklarna, vars ytor lättar fràn bromsytorna 22.Briefly, the function can be described as follows. When there is no pressure in the cavities 9, the legs 11 of the inherent spring force press the surfaces against the brake bodies 21 and 21, respectively. brake surface 22 and thus the slide 14 is braked in a certain position. If pressure is applied to the cavities, these will push out the legs, the surfaces of which are relieved from the brake surfaces 22.

Sliden 14 kan därmed röra sig fritt utefter skenan 3. I detta läge hos skänklarna, vid ett bestämt tryck i resp. hàlighet 9, har spelet mellan resp. bromsyta 22 och skänkelns yta ställts in för optimal funktion hos bromsen. Ett högre tryck i hålig- heterna 9 medför att bromskropparna 21 kan inställas i ett läge längre in i resp. kanal 10, vilket innebär en kraftigare bromsverkan, p.g.a. fjäderkraften hos skänklarna, när trycket i hàligheterna upphör.The slide 14 can thus move freely along the rail 3. In this position of the legs, at a certain pressure in resp. hàlighet 9, has the game between resp. brake surface 22 and the surface of the leg set for optimal function of the brake. A higher pressure in the cavities 9 means that the brake bodies 21 can be set in a position further into resp. channel 10, which means a stronger braking effect, due to the spring force of the legs, when the pressure in the cavities ceases.

Det skall underförstàs att uppfinningen kan varieras och modifieras inom ramen för patentkraven med andra former pà glidytorna och naturligtvis även annan form hos skenan med håligheter 9 och kanaler 10. I figurerna visas medbringaren 2 fixerad vid sliden 14 medelst exempelvis en skruv, som antyds i fig. 2. Infästningen kan naturligtvis även göras fjädrande eller "flytande", dvs. medbringaren upptar endast axiella krafter fràn sliden.It is to be understood that the invention can be varied and modified within the scope of the claims with other shapes on the sliding surfaces and of course also another shape of the rail with cavities 9 and channels 10. The figures show the carrier 2 fixed to the slide 14 by means of a screw as indicated in fig. 2. The attachment can of course also be made resilient or "floating", ie. the carrier absorbs only axial forces from the slide.

Claims

Q 10 15 20 25 465 889 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) formed on opposite sides and a slide (14) formed along the rail and slidably guided by sliding shoes (15) and connected to the slide (14) linearly by the sliding surfaces (8), connected to a carrier (2) connected to the piston, drawn by the fact that the rail (3) has two inside and along the rail extending and at its resp. sliding surface (8) by means of a channel (10) open cavity (9), whereby the rail (3) will have two limiting legs (11) limiting resp. one side of the channel (10), which resp. leg (11) cooperates with a brake member (21) provided at the slide (14) provided with a brake surface (22), and that resp. cavity (9) in a known manner can be pressurized to move said one side of the channel (10).

2. Braking device according to claim 1, characterized in that resp. brake means (21) is wedge-shaped with the narrower edge facing the channel (10).

Brake device according to the preceding claim, characterized by one side of and said one side of the channel (10). that the brake means (21) is lockably adjustable

Brake device according to claim 3, characterized in that the brake member (21) is fixed in motion (26) in a direction transverse to the adjustable direction.