CN1209262C

CN1209262C - Actuator arrangements

Info

Publication number: CN1209262C
Application number: CN01822408.3A
Authority: CN
Inventors: 安东尼·R·戴维斯
Original assignee: General Signal UK Ltd
Current assignee: SPX International Ltd
Priority date: 2000-12-19
Filing date: 2001-12-17
Publication date: 2005-07-06
Anticipated expiration: 2021-12-17
Also published as: PT1345803E; DE60132813D1; WO2002049902A1; DE60132813T2; DK1345803T3; ES2300306T3; CN1487893A; CY1107378T1; ATE385936T1; EP1345803B1; AU2002222231A1; EP1345803A1

Abstract

An actuator arrangement for moving first and second members (3, 4), the two members (3, 4) being interconnected with one another by a linkage (5) extending between them. The arrangement comprises first and second actuator means (6, 7) arranged to bear against respective movable members (3, 4) such that actuation of the first actuator (6) causes both movable members (3, 4) to move in one direction and actuation of the other actuator (7) causes both movable members (3, 4) to move in the opposite direction. A locking mechanism (20, 21) is coupled with the first and second actuators (6, 7) and is so arranged as to allow free movement in opposite directions caused by actuation of the first and second actuator means respectively but to prevent movement in either direction when not caused by actuation of the respective actuator means.

Description

Actuator devices

Technical field

The present invention relates to a kind of actuator devices.

Background technology

On railway switch or turn-out track linkage, adopt various actuator devices.The free end of the close turn-out track track of a kind of main drive actuator or most advanced and sophisticated against this turn-out track track, its effect is to one thruster of this rail with this track.Have at shift bar under the situation of long curved section, one, two even three additional actuator nearly must be arranged, perhaps backdrive actuator, these actuators are along the shift bar each interval, so that the promotion shift bar, or it is held in the correct position with respect to this rail.Main drive actuator generally includes the fastener or the locking piece of some forms, and they lock shift bar securely with respect to this rail.This has guaranteed that shift bar is held in the correct position, even the power that is applied by actuator itself also is like this in the time of should descending.Because track switch may remain on the switched period for a long time, several days perhaps, so, to occur inevitably in actuator that some are loosening, for example because the leakage of hydraulic fluid, thereby and the loss gradually of the power that causes caused loosening.On the position of backdrive actuator, relatively be not easy shift bar is locked on the desired position, because shift bar may separate with orbital member.So common in practice way is to monitor the displacement of shift bar from desired location, and applies power again by backdrive actuator where necessary and proofreaied and correct.The shift bar that monitors will apply actuation force to cause a ccasual indicating fault before proofreading and correct again from any departing from all of its desired location.This can cause producing danger signal on track circuit, thus and interruption railway traffic.

Summary of the invention

An object of the present invention is to provide the actuator devices of replacement.

According to an aspect of the present invention, a kind of actuator devices that first and second shift bars are moved is provided, described first and second shift bars are connected to each other by the attaching parts that extends between them, this device comprises: first and second actuators, they are arranged to against displaceable member separately, move in one direction so that the actuating of first actuator causes these two shift bars, the actuating of another actuator causes that these two shift bars move in the opposite direction; And lockout mechanism that is connected in first and second actuators, this lockout mechanism is arranged to allow respectively by the motion freely on the caused opposite sense of first and second actuated actuators, be not motion on the either direction that causes of the actuating by each actuator but stop.

This actuator devices is preferably a kind of hydraulic actuator.Lockout mechanism preferably includes two bars, and these two bars can move along its length, and has slide block separately, and these slide blocks can move along a groove, and when a bar was pushed to another root, these slide blocks applied outside latching force on the wall of described groove.These slide blocks can have the dip plane of cooperation.Described first and second parts are preferably shift bar.

Description of drawings

Describe in detail by way of example according to a switch actuator of the present invention referring now to accompanying drawing.

Fig. 1 is a planar view of this device.

Fig. 2 is a more detailed view of lockout mechanism.

Fig. 3 to 5 shows the lockout mechanism of replacement.

The specific embodiment

Referring to Fig. 1 and 2, actuator devices is in a pair of fixing this rail 1 and 2 and a pair of between the movable part that extends between described the rail, and the form of this double-type movable part is a pair of shift bar 3 and 4.The pipe link of a horizontal expansion between two shift bars or gage tie bar 5 link together two shift bars.

This actuator devices comprises two traditional hydraulic actuation cylinders 6 and 7, and they are fixed on a sleeper 10 or other fixed sturcture at its base portion 8 and 9 places, and two hydraulic actuation cylinders 6 and 7 align mutually, stretch out in the horizontal.Cylinder 6 and 7 is by the fluid drives from a traditional hydraulic power source, and this hydraulic power source is substantially with Reference numeral 11 expressions.Cylinder 6 and 7 piston 12 and 13 be Support brackets 14 and 15 respectively, and the outside of carriage has insulating nylon brush 16 and 17 respectively.Brush 16 and 17 abuts against the inside face 18 and 19 of shift bar 3 and 4 respectively, like this, by the actuating of suitable actuator, just can be with shift bar to extrapolation.Actuator 6 and 7 and shift bar 3 and 4 adjacency, thus them can be promoted, be not connected with shift bar.Carriage 14 and 15 is also supporting two identical lockout mechanisms 20 of structure and 21 opposite end.

Each lockout mechanism 20 and 21 comprises one first horizontal expansion bar 22, and the one end is connected with the carriage 14 in left side by a pair of nut 23.The opposite end of bar 22 extends to the only about half of of gap between two carriages 14 and 15, and carries a slide block or wedge 24, and this slide block 24 has one and is parallel to outside face 25 and inside face 26 that favours the about 30 degree angles of axis that bar 22 extends.Slide block 24 can carry a roller 27, as shown in Figure 2.Lockout mechanism 20 and 21 also comprises one second horizontal expansion bar 28, and this bar extends internally from relative carriage 15.The external right side end of this bar 28 has the carriage of being fixed by a pair of nut 29 15, and left-hand end carries one second slide block wedge 30 in it, and the shape of this wedge 30 cooperates with first slide block 24.Second slide block 30 has one and is parallel to the outside face 31 of bar 28 extensions and the inclined inner surface 32 on a surface 26 that is parallel to first slide block 24.Two bars 22 and 28 extend in a fixing groove 34, and this groove is positioned at sleeper 10, and the outside face 25 and 31 that this sleeper has relative side 35, two slide blocks 24 and 30 slides against this side 35.

When left side shift bar 3 was shifted to its this adjacent rail 1, a pump 40 in the operation hydraulic power source 11 made liquid actuator 6 feeds to the left, thereby causes its piston 12 to stretch out, with its carriage 14 to extrapolation, thereby and shift bar 3 is pushed against on the side of this rail 1.At this moment, it also will push the left side to along groove 34 at bar 22 in two lockout mechanisms 20 and 21 and slide block 24 thereof, and slide block can be free to slide in this groove.Gage tie bar 5 pushes away right shift bar 4 left.The medial surface 19 of right shift bar 4 abuts on the brush 17 of carriage 15, promotes piston 13, and like this, the fluid in the cylinder body 7 flows back to hydraulic power source 11.Two shift bars 3 and 4 are moved to the left together as a pair of thus.The boiler check valve 41 of cutting out 40, one controlled operations of pump then is locked in left actuator 6 on its position by preventing liquid from flowing out actuator, is opened up to this valve.The shift bar 3 that lockout mechanism 20 and 21 preventions cause owing to fluid leaks from actuator 6 and any motion to the right of 4.Shift bar 3 sport to the right moves inward bar 22 slightly, and like this, the inclined surface 26 of its slide block 24 slides along the inclined surface 32 on the slide block 30 of another bar 28.This makes two slide blocks 24 and 30 apply outside latching force on the surface 35 of groove 34, thereby two mutual wedgings of slide block are choked in other words.Should be noted that right-hand rod 28 can not produce displacement owing to right side shift bar 4 moves right, be not connected with this rail because supporting the carriage 15 of this bar.So shift bar 3 and 4 will remain on leftward position, up to hydraulic power source 11 feed fluids so that the piston 13 of right side actuator 7 move right.This makes bar 28 and its slide block 30 move, and breaks away from and engaging that another slide block 24 chokes.

Roller 27 on the slide block 24 has reduced the friction between two dip plane 26 and 32, thereby makes their slide relative freely.Alternatively, dip plane 26 and 32 can for example utilize suitable coating to be arranged to low friction with other means.For example by roughening, slide block 24 and 30 outside face 25 and 31 higher with respect to the friction coefficient on the surface 35 of groove 34, like this, when being choked locking, slide block does not slide along groove.

The lockout mechanism of various other forms also is feasible, needs only it and moves freely when being pulled rearward, and locks to get final product when being pushed.For example, illustrated in fig. 3,

bar

50 and 51 respectively supports the slide block that a form is a

clutch plate

52 and 53, has the

groove

56 and 57 of moulding on the

surface

54 and 55 that this two slide block is faced mutually, and engaging in this two groove has an eccentric cam 58.Cam 58 can be around an axis rotation of

crossing bar

50 and 51, and its shape makes a bar cause the cam rotation towards the promotion campaign of another bar, and the direction of rotation is tending towards forcing the wall 59 of two clutch plates 52 and the 53 outside grooves 60 that slide against described clutch plate within it.

Fig. 4 illustrates one and has two the be parallel to each other bar 70 of placement and 71 lockout mechanisms, and the end of two bars is connected to each other by a pivoted linkage 72, and this pivoted linkage and two bars are angled.Therefore

bar

70 and 71 respectively has a high friction areal of support 73 on its outer surface, and two bars make their pushed outwards in the horizontal opening towards the other side's motion in the vertical, thereby the wall 74 of the groove 75 that the areal of support of described two bars and two bars slide within it locks and contacts.

Fig. 5 illustrates a lockout mechanism, and it is similar to the lockout mechanism shown in Fig. 1 and 2, and just slide block 124 and 130 has modification, and each has a hook portion 224 and 230 in its end, this two hook portion directly in groove 134 mutually towards.A roller 127 is between the opposite face 126 and 132 of slide block 124 and 130.Can see, when any one bar 122 or 128 axially upward moves with respect to another, will cause that roller 127 rolls along the surface 126 and 132 of slide block 124 and 130, thereby apply a transverse force, foreign side to groove 134 pushes away with slide block, and with rod lock on the position.Yet, if any one in two bars 122 or 128 away from moving, will make roller 127 be positioned between two hook portions 224 and 230, like this with respect to another, slide block on the bar that moves will play the effect of another slide block of pulling, thereby and along the bar of groove 134 these slide blocks of pulling.The advantage of this structure is to need not a gage tie bar and just can work.

Be appreciated that to the invention is not restricted to railway points system, but other application that can be used for two parts of needs locking, it is not moved.Actuator is hydraulic pressure not necessarily, but can, for example be electronic or compressed-air controlled.

Claims

1. actuator devices that is used for moving first and second shift bars (3,4), described first and second shift bars (3,4) are interconnected by an attaching parts that extends between them (5), described device comprises: first and second actuators (6,7), this two actuator is arranged to against corresponding first and second shift bars (3,4), make the actuating of the actuator of winning (6) cause that first and second shift bars (3,4) move in one direction, and the actuating of second actuator (7) cause that first and second shift bars (3,4) move in the opposite direction; And with first and second actuators (6,7) bonded assembly lockout mechanisms (20,21), this lockout mechanism (20,21) is arranged to allow respectively by the free motion on the caused opposite sense of actuating of first and second actuators (6,7), be not motion on the either direction that causes of the actuating by each actuator but stop.

2. actuator devices as claimed in claim 1, wherein lockout mechanism (20,21) comprises two bars (22,28), this two bar can move along its length direction, and has separately a slide block (24,30), this slide block can move along a groove (34), described slide block (24,30) is arranged to apply outside latching force on the wall of described groove (34) when a bar is pushed to another bar.

3. actuator devices as claimed in claim 2, wherein slide block (24,30) has the dip plane (26,32) of cooperation.

4. actuator devices as claimed in claim 2, wherein slide block (24,30) limits opposing inclined face (26,32), is provided with roller (27) between the dip plane of described slide block.

5. actuator devices as claimed in claim 4, wherein the far-end at each slide block (124,130) is provided with a hook portion (224,230), and this hook portion is arranged to engage with roller (127) when arbitrary bar in the bar (122,128) moves away from another root bar.

6. actuator devices as claimed in claim 3 wherein is provided with a low-friction coating in respectively cooperating of described slide block on the dip plane.

7. actuator devices as claimed in claim 2, wherein said slide block has facing surfaces (54,55), this facing surfaces respectively limits the groove (56,57) of a moulding, an eccentric cam (58) is between the described facing surfaces of slide block, its each end respectively with the groove (56,57) of described moulding in one engage, eccentric cam (58) can cross the axis rotation that described bar extends around one.

8. actuator as claimed in claim 1, wherein lockout mechanism comprises two bars (70,71), this two bar can move in a groove (75) along its length direction, the end of bar (70,71) is interconnected by a pivoted linkage (72), and bar and attaching parts are arranged to apply outside latching force on the wall of groove (75) when a bar is pushed to another bar.