CN106715231A

CN106715231A - Slack adjuster having a one piece housing

Info

Publication number: CN106715231A
Application number: CN201480081988.7A
Authority: CN
Inventors: 霍华德·E·胡贝尔; 安·吉普森
Original assignee: New York Air-Lock Co Ltd
Current assignee: New York Air-Lock Co Ltd; New York Air Brake LLC
Priority date: 2014-09-17
Filing date: 2014-09-17
Publication date: 2017-05-24
Anticipated expiration: 2034-09-17
Also published as: CN106715231B; BR112017004968A2; CA2961406A1; ZA201701603B; WO2016043727A1; AU2014406474A1; CA2961406C; AU2014406474B2

Abstract

A slack adjuster having a single, unitary housing that changes in length to compensate for brake pad wear in a rail car braking system. A threaded tension rod extends a variable length from the housing depending on rotation of the tension rod relative to the housing. A clutch assembly enclosed within a rod guide controls rotation of the tension rod and an overtravel assembly positioned in the single housing controls whether the clutch assembly will allow or prevent rotation of the threaded rod. A control rod and actuating tube transmit the controlling forces to the overtravel assembly so that the tension rod will be retained in a new length when the slack adjuster needs to take up slack in the braking system.

Description

Slack adjuster with integral housing

Technical field

The present invention relates to railway brake system slack adjuster, and there is single housing more specifically to one kind Slack adjuster.

Background technology

Slack adjuster be arranged in the brake rigging of rolling stock with automatically adjust in brake rigging it is lax so as to Brake cylinder piston rod stroke is maintained in distance to a declared goal.Brake cylinder piston rod stroke is suitable for the Fluid pressure in checking cylinder It is important for balance so that whole brakings aboard are all operated under the same terms and time and ensured basic Upper uniform brake force is applied on each group wheel on each compartment in train.Traditional slack adjuster utilizes two Separate housing individually accommodates excess of stroke component and tensioning spring component, itself then by being commonly referred to the 3rd shell of connection body Body is linked together, and this 3rd housing accommodates clutch pack to release pull bar and to adjust the length of slack adjuster.Phase , there is a kind of housing being reduced to for the elastic adjustment with single housing needed for manufacturing slack adjuster and company in Ying Di The demand of the quantity of fitting.

The content of the invention

The present invention includes slack adjuster, and it has single overall housing and threaded pull bar, the threaded pull bar Position and extend a variable-length from housing relative to the rotation of housing with according to pull bar in this housing.With clutch and Clutch pack positioning to thrust bearing engages to selectively allow for or prevent the rotation of pull bar in the housing and with pull bar Turn, thus control pull bar from housing extend how much.Control-rod is interconnected to actuating pipe, and this actuating pipe is extended in the second end of housing To activate the excess of stroke component being positioned in this housing.This excess of stroke component is operably connected to clutch pack with according to control-rod The rotation of clutch is allowed or prevented relative to the movement of housing.Slack adjuster also includes bar guiding piece, this bar guiding piece It is fixedly attached to the center section of housing and with the first end for surrounding clutch and the second end of encirclement pull bar.Lid It is fixed to the first end of bar guiding piece.

Excess of stroke component includes：Extend in housing and with the first flange for being operably connected to clutch pack First sleeve, extends and with the second sleeve pipe of the second flange for being operably connected to control-rod in first sleeve, with And it is positioned at the spring between the first flange of first sleeve and the second flange of the second sleeve pipe.With the second flange of the second sleeve pipe And the retaining ring of the inner surface engagement of first sleeve keeps the second sleeve pipe and the scalable engagement of first sleeve, will be by actuating The power that pipe applies is delivered to the second flange so as to be delivered to clutch pack by the first flange.In this regard, excess of stroke component leads to At least one pin for crossing one that the first flange of the second sleeve pipe is connected in thrust bearing is interconnected to clutch pack.Lid Second end of son closing housing and the hole of the second end with permission pull bar and the into and out housing of actuating pipe.It is covered with dust It is positioned in the second end of housing and is engaged with actuating pipe.

Spring assembly is located between the plate of pull bar and the first end of housing in being positioned at housing, and in the first end of housing In wear ring surround this pull bar.Spring assembly includes a pair of springs and the spring guide being positioned between this pair of spring. Be allowed into the wasp excluder of the inside of housing can be positioned at multiple positions, such as the first end in housing, neighbouring clutch Device assembly or neighbouring excess of stroke component are allowing the discharge of the inside of housing.

Brief description of the drawings

Will be more fully understood from and the understanding present invention by the way that following detailed description is read in conjunction with the figure, in accompanying drawing In：

Fig. 1 is the stereogram of slack adjuster of the invention.

Fig. 2 is the exploded view of slack adjuster of the invention；And

Fig. 3 is the longitudinal cross-section of slack adjuster of the invention.

Specific embodiment

Referring now to accompanying drawing, wherein throughout identical reference represents same parts, see in Fig. 1 with bag Include the slack adjuster 10 of single integrated unit or partial housing 12.Connection fork 14 is attached to threaded pull bar 16, the band Thread 16 extends for connection to the fulcrum of foundation brake system from the first end 18 of housing 12.Second end 20 of housing 12 The second connection fork 22 including the brake bar for adjuster 10 to be connected to foundation brake system.Second end 20 of housing 12 is also Control-rod 26 including actuating pipe 24 and connection and for pitching the company that brake bar is interconnected at 22 points that separate with being connected Connect fork 28.Housing 12 includes the center section positioning along single housing 12 to capture first group of positioned internal bar guiding piece 32 Screw 30 and close second group of screw 34 of the lid 36 at the second end 20 of adjuster 10 for capturing.As tradition is elastic Adjuster, in response to being applied to releasing for connection fork 14, the power of connection fork 22 and connection fork 28 and pull bar 16, elastic adjustment Device 10 is extended and is shortened by the controlled rotation of the threaded pull bar 16 in housing 12 so that from the bar 16 that first end 18 extends The change advanced in response to brake cylinder piston rod of length and be changed.

Reference picture 2, the first end 18 of slack adjuster 10 includes 40 and the wear ring of being covered with dust being positioned at around pull bar 16 42.Screw 30 is fixed to housing 12 by screw fixture 44.Wasp excluder 38 can be positioned at first end 18, the center section of housing 12 Or the second discharge orifice in end 20 in any one is sentenced and allows to discharge any moisture being likely to accumulate in the inside of housing 12.Draw Bar 16 includes the plate 64 fixed along intermediate portion.Major diameter spring 48, the spring guide 50 being positioned inside spring 48, with And contained spring 52 is positioned along the pull bar 16 of the inside of the first end 18 for being contiguous to housing 12 and the plate 64 of pull bar 16.Lid 54th, the screw thread of spring 56, clutch shaft bearing 58 and pull bar 16 is engaged clutch 60 and second bearing 62 are in the relative of plate 64 Positioned and thus including the clutch pack in housing 12 along pull bar 16 on side.Due to the inside of clutch 60 with And the corresponding progressive distortion screw thread on the outside of pull bar 16, clutch 60 freely revolved by the axial movement of pull bar 16 Turn.However, when bearing 62 is exerted a force to, clutch 60 will be fixed, thus prevent pull bar 16 in housing 12 rotation with And axially move.

Bar guiding piece 32 around pull bar 16 is positioned at from accommodating lid 54, spring 56, clutch shaft bearing 58, threaded The Part I 66 of the wide aperture of clutch 60 and second bearing 62 extends to the narrower bore for closely surrounding pull bar 16 the Two parts 68.Lid 54 is preferably fixed together with the Part I 66 of bar guiding piece 32 via complementary screw thread group.Reference Fig. 3, Part I 66 is separated with Part II 68 by shoulder 70, and this shoulder limits a pair relative pins 74 and can pass through it Passage 72, and for receiving first group of screw 30 and being securely maintained at bar guiding piece 32 a series of in housing 12 Raised 76.Alternatively, screw 30 can include rivet, plug weld or be connect with the individual features on raised 76 outer surface The crimping of the external diameter of the housing 18 of conjunction, so as to be fixed to housing 18 by raised 76.Packing ring 78 is connected to pull bar via retaining ring 80 Smooth movement of 16 end for bar 16 in the narrower bore of the Part II 68 of bar guiding piece 32.Sleeve pipe 82 is positioned at bar and draws Flange 84 around the Part II 68 of guiding element 32 so as to sleeve pipe 82 is abutted with pin 74.Sleeve pipe 82 accommodates spring 86 and has The inner sleeve 88 of opposing flanges 90, this opposing flanges in sleeve pipe 82 and the IT spring 86 of inner sleeve 88, thus in housing 12 Form excess of stroke component.Inner sleeve 88 is maintained in sleeve pipe 82 by expanding to the retaining ring 92 interlocked with the inner surface of sleeve pipe 82. Retaining ring 92 has and is enough to allow actuating pipe 24 and inner sleeve 88 if actuating pipe 24 is axially mobile along bar guiding piece 32 Flange 90 contact internal diameter.Closing the lid 36 at the second end 20 of housing 12 includes that second group the one of screw 34 is for reception Row raised 94.Lid 36 includes through hole 96, and this through hole allows bar guiding piece 32 to extend to the outside of housing 12 and allows actuating to manage During 24 slide into housing 12 along bar guiding piece 32.O-ring 98 be covered with dust 100 can be positioned at actuating pipe 24 around with closure Connection between son 36 and actuating pipe 26 is preventing the entrance of moisture and other pollutants.Bar guiding piece 32 is fixed to connection fork 22 And second be covered with dust 102 actuating pipe 24 in positioned for use in sealing purpose along bar guiding piece 32.

Adjuster 10 can from there through clutch 60 by threaded pull bar 16 be rotated in length carry out extend with Shrink.When the change of the length by the slack adjuster 10 more than the predetermined quantity such as set up by control-rod 26 is super to activate During journey component, actuating pipe 24 along bar guiding piece 32 axial movement and enter into inner sleeve 88 exerted a force in housing 12 Flange 90.When this power overcomes the bias force of the spring 86 being positioned between inner sleeve 88 and sleeve pipe 82, sleeve pipe 82 is by power It is applied to pin 74.Pin 74 this power is delivered to clutch 60 with bearing 58 and 62 by the shoulder 70 of bar guiding piece 32 in case Only clutch 60 rotates.Pull bar 16 will remain in it is any change construction in, thus change slack adjuster 10 effective length with And compensation brake pad wear.

Claims

1. a kind of slack adjuster, it includes：

Single housing, it extends to the second end from first end；

Pull bar, its inside for being positioned at the housing and extends a length from the first end of the housing, and the pull bar can Relative to the housing movement with change from the housing extend length；

Clutch pack with clutch, it is positioned in the housing and engages to control the pull bar with the pull bar Relative to the movement of the housing；

Control-rod, its second end for being interconnected to the housing and can move relative to the housing；

Excess of stroke component, its be positioned in the housing and be operably connected to the clutch pack and the control-rod with Set the length that the first end from the housing of the pull bar extends.

2. slack adjuster according to claim 1, also including with the first end and encirclement for surrounding the clutch The bar guiding piece at the second end of the pull bar, wherein the bar guiding piece is fixedly attached to the center section of the housing.

3. slack adjuster according to claim 2, also including being fixed to the lid of the first end of the bar guiding piece.

4. slack adjuster according to claim 3, wherein, the clutch pack also includes being positioned at the clutch Either side on a pair of thrust bearings and with a spring for engaging in the lid and the thrust bearing.

5. slack adjuster according to claim 4, wherein the excess of stroke component includes：

First sleeve, it extends and convex be operably connected to the clutch pack first in the housing Edge；

Second sleeve pipe, it extends and convex be operably connected to the control-rod second in the first sleeve Edge；

Spring, it is positioned between the second flange of the first flange of the first sleeve and second sleeve pipe；And

Retaining ring, it engages to keep described with the second flange of second sleeve pipe and the inner surface of the first sleeve Two sleeve pipes and the scalable engagement of the first sleeve.

6. slack adjuster according to claim 5, wherein the excess of stroke component is interconnected to institute by least one pin State clutch pack.

7. slack adjuster according to claim 6, wherein the pin is by the first flange interconnections of second sleeve pipe To one in the thrust bearing.

8. slack adjuster according to claim 7, wherein, the second sleeve pipe of the excess of stroke component is contacted with actuating pipe, The actuating pipe is attached to the control pipe and is positioned at the second end top of the pull bar to move axially to the shell In second end of body.

9. slack adjuster according to claim 8, also including lid, the second end of housing described in the closed with covers is simultaneously And the hole entered into the housing with the second end and the actuating pipe for allowing the pull bar.

10. slack adjuster according to claim 9, also including being covered with dust, described being covered with dust is positioned at the second of the housing Engaged in end and with the actuating pipe.

11. slack adjusters according to claim 10, the first end for being additionally included in the housing is positioned at the pull bar The wear ring of surrounding.

12. slack adjusters according to claim 11, also including being fixedly connected to the pull bar and against described The plate of the lid positioning of bar guiding piece.

13. slack adjusters according to claim 12, be additionally included in the housing be positioned at the plate of the pull bar with Spring assembly between the first end of the housing.

14. slack adjusters according to claim 13, wherein the spring assembly includes a pair of springs and is positioned at Spring guide between this pair of spring.

15. slack adjusters according to claim 14, also including allowing access into the wasp excluder of the inside of the housing.