CN106715231B

CN106715231B - Slack adjuster with integral housing

Info

Publication number: CN106715231B
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
Priority date: 2014-09-17
Filing date: 2014-09-17
Publication date: 2019-04-23
Anticipated expiration: 2034-09-17
Also published as: CA2961406A1; WO2016043727A1; AU2014406474A1; ZA201701603B; CA2961406C; CN106715231A; AU2014406474B2; BR112017004968A2

Abstract

It is a kind of with single, overall housing slack adjuster, variation is in length to compensate the brake pad wear in rail vehicle braking system.Rotation of the threaded pull rod according to pull rod relative to shell extends a variable-length from shell.Whether the excess of stroke component control clutch pack of the clutch pack control pull rod being enclosed in bar guiding piece being rotated and positioned in single housing will allow or prevent the rotation of threaded shank.Control-rod and actuating pipe by control force be transmitted to excess of stroke component so as to when slack adjuster needs to tighten pull rod new length will be maintained in braking system.

Description

Slack adjuster with integral housing

Technical field

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

Background technique

Slack adjuster be arranged in the brake rigging of rolling stock with automatically adjust the relaxation in brake rigging to Brake cylinder piston rod stroke is maintained in distance to a declared goal.Brake cylinder piston rod stroke is for the suitable of the Fluid pressure in checking cylinder It is important for balance, so that whole brakings aboard all operate under the same terms and time and ensure 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, then by be commonly referred to as connection body third shell Body is linked together, this third shell accommodates clutch pack to loosen pull rod and to adjust the length of slack adjuster.Phase Ying Di, there are a kind of to be reduced to shell and company needed for manufacturing slack adjuster for the elastic adjustment with single housing The demand of the quantity of fitting.

Summary of the invention

The present invention includes slack adjuster, with single overall housing and threaded pull rod, the threaded pull rod It positions and a variable-length is extended from shell with the rotation according to pull rod relative to shell in this shell.With clutch and one Engage the rotation to selectively allow for or prevent pull rod in the housing and with pull rod to the positioning of the clutch pack of thrust bearing Turn, thus control pull rod from shell extend how much.Control-rod is interconnected to actuating pipe, this actuating pipe extends in the second end of shell To activate the excess of stroke component being located in this shell.This excess of stroke component is operably connected to clutch pack according to control-rod Allow or prevent the rotation of clutch relative to the movement of shell.Slack adjuster further includes bar guiding piece, this bar guiding piece It is fixedly attached to the middle section of shell and there is the first end for surrounding clutch and surround the second end of pull rod.Lid First end fixed to bar guiding piece.

Excess of stroke component includes: to extend in shell and have the first flange for being operably connected to clutch pack First sleeve extends and has the second casing of the second flange for being operably connected to control-rod in first sleeve, with And it is located in the spring between the first flange of first sleeve and the second flange of the second casing.With the second flange of the second casing And the retaining ring of the inner surface engagement of first sleeve keeps the second casing and the scalable engagement of first sleeve, will pass through actuating The power that pipe applies is transmitted to the second flange to be transmitted to clutch pack by the first flange.In this regard, excess of stroke component is logical It crosses one at least one pin that the first flange of the second casing is connected in thrust bearing and is interconnected to clutch pack.Lid The second end of son closing shell and the hole that there is the second end of permission pull rod and actuating to manage into and out shell.It is covered with dust It is located in the second end of shell and is engaged with actuating pipe.

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

Detailed description of the invention

The present invention will be more fully understood from and understand by reading following detailed description in conjunction with the accompanying drawings, in attached drawing In:

Fig. 1 is the perspective view of slack adjuster according to the present invention.

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

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

Specific embodiment

Referring now to attached drawing, wherein throughout identical appended drawing reference indicates same parts, seeing in Fig. 1 has packet Include the slack adjuster 10 of single integrated unit or partial shell 12.Connecting fork 14 is attached to threaded pull rod 16, the band Thread 16 extends to be connected to the fulcrum of foundation brake system from the first end 18 of shell 12.The second end 20 of shell 12 The second connecting fork 22 including the brake bar for adjuster 10 to be connected to foundation brake system.The second end 20 of shell 12 is also Control-rod 26 including actuating pipe 24 and connection and the company for being interconnected to brake bar at the point separated with connecting fork 22 Connect fork 28.Shell 12 includes positioning along the middle section of single housing 12 to capture first group of positioned internal bar guiding piece 32 Screw 30 and for capturing close adjuster 10 second end 20 lid 36 second group of screw 34.As tradition is elastic Adjuster, in response to being applied to loosening for connecting fork 14, the power of connecting fork 22 and connecting fork 28 and pull rod 16, elastic adjustment Device 10 is extended and is shortened by the controlled rotation of the threaded pull rod 16 in shell 12, so that the bar 16 extended from first end 18 Length be changed in response to variation that brake cylinder piston rod is advanced.

Referring to Fig. 2, the first end 18 of slack adjuster 10 includes 40 and the wear ring of being covered with dust being located in around pull rod 16 42.Screw 30 is fixed to shell 12 by screw fixture 44.Wasp excluder 38 can be positioned at the middle section of first end 18, shell 12 Or to allow to discharge any moisture being likely to accumulate in the inside of shell 12 at the discharge orifice in any of second end 20.It draws Bar 16 includes the plate 64 fixed along intermediate portion.Major diameter spring 48, the spring guide 50 being located in inside spring 48, with And contained spring 52 is positioned along the pull rod 16 of the inside for the first end 18 for being adjacent to shell 12 and the plate 64 of pull rod 16.Lid 54, spring 56, first bearing 58, the clutch 60 engaged with the screw thread of pull rod 16 and second bearing 62 are in the opposite of plate 64 It is positioned on side along pull rod 16 and thus includes the clutch pack in shell 12.Due to the inside of clutch 60 with And the corresponding progressive distortion screw thread on the outside of pull rod 16, clutch 60 are freely revolved by the axial movement of pull rod 16 Turn.However, clutch 60 will be fixed when exerting a force to bearing 62, thus prevent pull rod 16 from rotating in shell 12 with And it axially moves.

It is located in bar guiding piece 32 around pull rod 16 and accommodates lid 54, spring 56, first bearing 58, threaded from having The first part 66 of the wide aperture of clutch 60 and second bearing 62 extends to the with the narrower bore for closely surrounding pull rod 16 Two parts 68.Lid 54 is preferably fixed together via complementary screw thread group with the first part 66 of bar guiding piece 32.Reference Fig. 3, first part 66 are separated with second part 68 by shoulder 70, this shoulder, which limits a pair of opposite pin 74, can pass through it Channel 72, and for receiving first group of screw 30 and being securely maintained at bar guiding piece 32 a series of in shell 12 Protrusion 76.Alternatively, screw 30 may include rivet, plug weld or connect with the individual features on the outer surface of protrusion 76 The crimping of the outer diameter of the shell 18 of conjunction, so that protrusion 76 is fixed to shell 18.Washer 78 is connected to pull rod via retaining ring 80 16 end is with the smooth movement for bar 16 in the narrower bore of the second part 68 of bar guiding piece 32.Casing 82 is located in bar and draws So that the flange 84 of casing 82 is abutted with pin 74 around the second part 68 of guiding element 32.Casing 82 accommodates spring 86 and has The inner sleeve 88 of opposing flanges 90, this opposing flanges captures spring 86 in casing 82 and inner sleeve 88, thus in shell 12 Form excess of stroke component.Inner sleeve 88 is maintained in casing 82 by being extended to the interlocking retaining ring 92 of the inner surface of casing 82. Retaining ring 92 has to be enough to allow to activate pipe 24 and inner sleeve 88 if actuating pipe 24 is axially moved along bar guiding piece 32 Flange 90 contact internal diameter.The lid 36 of the second end 20 of closing shell 12 includes the system for receiving second group of screw 34 Column protrusion 94.Lid 36 includes through-hole 96, this through-hole allows bar guiding piece 32 to extend to 12 outside of shell and allows to activate pipe 24 slide into shell 12 along bar guiding piece 32.O-ring 98 and be covered with dust 100 can be positioned at actuating pipe 24 around with sealing cover Connection between son 36 and actuating pipe 26 is to prevent the entrance of moisture and other pollutants.Bar guiding piece 32 is fixed to connecting fork 22 And second be covered with dust 102 actuating pipe 24 in along bar guiding piece 32 position for use in sealing purpose.

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

Claims

1. a kind of slack adjuster comprising:

Single housing extends to second end from first end；

Pull rod is located in the inside of the shell and extends a length from the first end of the shell, and the pull rod can It is mobile to change the length extended from the shell relative to the shell；

Clutch pack with clutch is located in the shell and is engaged with the pull rod to control the pull rod Movement relative to the shell；

Control-rod is interconnected to the second end of the shell and can move relative to the shell；

Excess of stroke component, be located in the shell and be operably connected to the clutch pack and the control-rod with Set the length of the pull rod extended from the first end of the shell；And

Bar guiding piece has the first end for surrounding the clutch and surrounds the second end of the pull rod, wherein the bar Guiding piece is fixedly attached to the middle section of the shell.

2. slack adjuster according to claim 1 further includes the lid of the first end fixed to the bar guiding piece.

3. slack adjuster according to claim 2, wherein the clutch pack further includes being located in the clutch Either side on a pair of of thrust bearing and with a spring engaged in the lid and the thrust bearing.

4. slack adjuster according to claim 3, wherein the excess of stroke component includes:

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

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

Spring is located between the first flange of the first sleeve and the second flange of second casing；And

Retaining ring is engaged with the inner surface of the second flange of second casing and the first sleeve to keep described Two casings and the scalable engagement of the first sleeve.

5. slack adjuster according to claim 4, wherein the excess of stroke component is interconnected to institute by least one pin State clutch pack.

6. slack adjuster according to claim 5, wherein the pin is by the first flange interconnections of the first sleeve To one in the thrust bearing.

7. slack adjuster according to claim 6, wherein the second casing of the excess of stroke component is contacted with actuating pipe, The actuating pipe is attached to the control-rod and is located in the second end top of the pull rod to move axially to the shell In the second end of body.

8. slack adjuster according to claim 7, wherein the second end of shell described in the closed with covers and have The second end and the actuating pipe for allowing the pull rod enter the hole in the shell.

9. slack adjuster according to claim 8 further includes being covered with dust, described be covered with dust is located in the second end of the shell In and engage with the actuating pipe.

It further include being located in the pull rod week in the first end of the shell 10. slack adjuster according to claim 9 The wear ring enclosed.

11. slack adjuster according to claim 10 further includes being fixedly connected to the pull rod and against described The plate of the lid positioning of bar guiding piece.

12. slack adjuster according to claim 11, further include be located in the shell plate of the pull rod with Spring assembly between the first end of the shell.

13. slack adjuster according to claim 12, wherein the spring assembly includes a pair of of spring and is located in This is to the spring guide between spring.

14. slack adjuster according to claim 13 further includes the wasp excluder for allowing access into the inside of the shell.