DE2751619A1 - SPRING-BRAKE CYLINDER FOR AIR BRAKE SYSTEMS - Google Patents

Description

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Spring brake cylinders for air brake systems

The invention relates to a spring-loaded brake cylinder for compressed air brake systems, in particular for rail vehicles, can be acted upon by compressed air against the force of a storage spring arranged in the cylinder housing Piston and a locking device locking the piston in its position when the accumulator spring is tensioned, which a plunger connected to the piston and displaceably penetrating a housing base supporting the accumulator spring, a locking groove which cooperates with a locking groove arranged near the end of the tappet and which is parallel to one which is eccentric to the tappet Axis on the side of the housing bottom facing away from the accumulator spring, a pawl pivotably mounted on this, an adjusting cylinder for pivoting the pawl, on the side of the pawl on the housing bottom arranged valve devices for Controlling the pressurization of compressed air on the actuating cylinder, also located on the bottom of the housing on the side of the pawl, from this actuated, electrical switching devices for visual display, and a housing bottom with the pawl, The housing cover covering the actuating cylinder, the valve and the switching devices is open.

Such a spring brake cylinder is known, for example, from US Pat. No. 4,014,579. Here are the pawls, the actuating cylinder with the valve devices and the switching devices are designed as separate components, each of which for itself on the inextricably connected to the cylinder housing

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housing floor is arranged and attached. For assembly and Maintenance work on the spring brake cylinder built into the compressed air brake system is therefore mostly spatial In very cramped conditions a "multitude of connections to assemble or to loosen to the many, named individual parts to be attached to the bottom of the case or to be loosened. The assembly or This makes maintenance work more difficult and expensive.

It is the object of the invention to design a spring brake cylinder of the type mentioned in a simple manner in such a way that that the assembly and maintenance work mentioned can be carried out easily and cheaply.

This object is achieved according to the invention in that the housing base is essentially in a radial plane to the plunger is formed divided, with the one, storage spring-side part in a known manner fixed to the cylinder housing connected and the ratchet side, other part with the with it connected housing cover an essentially closed, the pawl, the actuating cylinder, the valve and the switching devices containing the housing forms, which can be attached as a complete assembly to one part of the housing base and releasably connected to it. This design ensures that the pawl, the actuating cylinder, the valve and the switching devices mountable under favorable circumstances and working conditions on the pawl-side part of the housing base and with the housing cover to form a complete assembly

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can be completed, the assembly with only one operation even in confined spaces easily and cheaply on the part of the housing bottom on the storage spring side of the spring brake cylinder installed in the air brake system can be attached or removed from it. To speed up the maintenance work, a maintenance-requiring As usual with replacement parts, the assembly can be replaced by an already overhauled assembly; the maintenance work for the entire compressed air brake system or the rail vehicle, this is significantly accelerated.

The attachment of the complete assembly to the remaining part of the spring brake cylinder can according to further features the invention are further simplified and facilitated in that one of the housing base parts to one Plunger coaxial centering attachment with a cylindrical circumferential surface has, which engages in a corresponding centering recess on the other housing bottom part, and that continues to The pawl is designed as a double pawl that encompasses the plunger-like pliers-like, expandable, that the plunger has a also zv / ei mirror-inverted opposite, through a web-like Plunger cross-section having completely separate transverse grooves formed double locking groove, and that one the housing base parts an eccentric to the plunger, zue other housing bottom part towards projecting guide approach which is equiaxed in a sun pestle, extending over engages an angular range of approx. 90 circular arc-shaped extending guide track recess on the other housing bottom part.

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According to further features of the invention, this can be done in a simpler manner Way, the always correct rotational position between the plunger and double pawl ensures that the plunger cannot be rotated is guided in the storage spring-side housing bottom part, and continues to be on the storage spring-side housing bottom part as An annular body can be attached to the centering lug, which surrounds the plunger with a protruding in the direction of the accumulator spring Pipe socket protrudes through an opening in this housing base part, and between the pipe socket and the plunger an ITut-Kail guide formed from a longitudinal groove in one and a wedge engaging in this on the other of these two parts can be arranged.

In order to allow only very little installation space to attach the complete assembly to the rest of the spring brake cylinder need, it can be advantageous according to a further feature of the invention if the plunger with a double-sided, recesses perpendicular to the transverse grooves of the double locking groove flattened section ends. This only short section in the axial direction can be inserted between the double pawl and can spread the latter by turning it by 90 °, so that then the complete assembly is completely on the remaining spring brake cylinder can be brought up axially, the double pawl engaging in the double locking groove.

The drawing shows an exemplary embodiment of the one essential to the invention Parts of a brake cylinder

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for example shown, namely shows

1 shows a part of a substantially axially cut open Peder storage brake cylinder,

Fig. 2 is a rear view of the spring brake cylinder with the housing cover cut open,

Fig. 3 is a partial section along the line A-A in Fig. 1, Fig. 4 is a partial section along the line B-B in Fig. 1,

3 shows a rear view of the plunger in the direction of arrow F according to FIGS. 1 and

6 shows a partial section through a second embodiment of the spring brake cylinder.

According to FIG. 1 v / e is a front part designed as usual, for example in accordance with US Pat. No. 4,014,579 and therefore spring brake cylinder not shown in this section in a cylinder housing 1, a storage spring 2, polygons forward, according to FIG. 1 to the left, against a piston, not shown, displaceable in the cylinder housing 1 and, on the other hand, over a leading end thereof Z v / i see part 3 against part 4 of one composed of this part 4 and a further part 5 to be explained later Housing bottom 4, 5 is supported. The housing bottom part 4 is in the usual way by means of an opposing

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protruding ring grooves on the outer circumference of part 4- and on Innenuiafang of the cylinder housing 1 threaded locking ring 6 connected to the cylinder housing 1 in an axially immovable manner. A central opening of the annular disk-shaped Part 4- is on the side facing away from the storage spring 2 of a ring-like centering attachment firmly connected to part 4- 7, which has a tubular extension protruding through the opening of the part 4 in the direction of the storage spring 2 S has. The tubular extension 8, which has a longitudinal groove 9 on its inside, is penetrated by a plunger 10, its front end on the piston, not shown, of the spring brake cylinder s is attached. A sliding block-like wedge 11 inserted into the outer circumference of the plunger 10 engages longitudinally displaceable into the longitudinal groove 9, as shown in FIG. 4, which shows a section along the line B-B.

The substantially likewise annular part 5, 5 of the housing bottom, 5 is attached to the part 4, with its recess encompassing the cylindrical circumferential surface 12 of the centering attachment 7 in a centering manner. On the side facing away from the accumulator spring 2, the part 4- has a recess 13 coaxial with the circumferential surface, extending over a quarter arc and serving as a guide track for a pin-like guide extension 14- engaging in it and fastened to the part 5. .. In a dor section line AA according to Figure performing in Figure 3 ict Führungsbaim the recess 13 with the eingreifenlon in _s ie Führungcancatz 14- 1: 1 ar shown.

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The part 5 of the housing bottom 4, 5 carries on its outer The circumference on the side facing away from the storage spring 2 has a cylindrical wall section 15 »on one another whole part 5 spanning housing cover 16 with vent screw 17 is placed. Those with the reference numerals 5, 15 and 16 designated parts thus form an essentially closed housing. Inside this housing, the housing base part 5 can be pivoted by means of two bolts 18 a double pawl 19 in a radial direction to the plunger 10 Movable level; the two pawl parts of the double pawl 19 are by means of an adjusting cylinder 20, the piston body on one and the piston rod on the other Klirikteil is hinged, spreadable and again connectable. In particular, from Fig. 2 is the arrangement the double pawl 19 with the adjusting cylinder 20 can be easily removed. Furthermore, in the housing 5 »15» 16 is on part 5 a solenoid valve device 21 is arranged, which via a flexible hose connection 22 the application of compressed air of the actuating cylinder 20 is monitored. Via a line connection 23, which breaks through the wall section 15, and one Line connection (not shown) running in the housing 5 »15» 16 24 is the solenoid valve assembly 21 with Compressed air supplied. Furthermore, the wall section 15 is pierced by a cable bushing 25, through which the excitation of the Ilagne valve arrangement 21 and serving -.reiter, see below electrical switch equipment 27 for electrical

leadingο have 1 echo visual indicators (not shown)? in the housing 5 »15, 16 are introduced. The switch also attached to part 5

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"* 2751bia

Device 27 is switched by a pawl part of the double pawl 19 by means of a stop device 28. Zv / ei inserted into the part 5, in the housing 5, 15, 16 protruding clamping sleeves 29 limit the movement of the pawl parts of the double pawl 19. Furthermore, protrudes into the housing 5, 15, 16 an adjustable screwed to the wall section 15 by a lock nut 30 in its respective position lockable adjusting screw 31, with which a locking block 32 engaging between the pawl parts of the double pawl 19 can be adjusted radially from an inner locking position, clearly recognizable from FIG. 2, in which it excludes the spreading of the double pawl 19, into an outer release position , in which it does not hinder the working movements of the double pawl 19.

The housing 5, 15, 16 is on the housing base part 4 by means of screws 33 passing through the housing cover 15 and part 5 attached.

The plunger 10 protrudes through the tubular extension 4 into the housing 5, 15, 16, wherein it engages through the double pawl 19, in the area of which it is defined by two mirror-inverted opposite, leaving a web-like tappet cross-section 34 according to FIG. 5 Has transverse grooves 35, in connection with this again on one short length assumes its full, circular cross-section and ends with a short section 36, which is to the transverse grooves 35 perpendicular recesses 37 is flattened on both sides.

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27516Ί9

In the tensioned state of the accumulator spring 2 shown, the double pawl 19 engages in the transverse grooves 35 of the plunger 10 and locks this and thus the piston of the spring-loaded brake cylinder and the accumulator spring 2 in their tensioned Spring brake cylinder corresponding positions. It is in the transport position shown for safety reasons the double pawl 19 through which in its radially inner Locking position located locking block 32 blocked; an unwanted one Relaxation of the accumulator spring 2 is therefore excluded. After installing the spring brake cylinder in the By means of the adjusting screw 31, the compressed air brake system moves the locking block 32 radially outward toward the wall section 15 moved and secured again by means of the lock nut 30. The locking block 32 releases the double pawl 19, which, however, preferably by a return spring located in the adjusting cylinder 20 initially continues in the drawn Position of engagement in the transverse grooves 35 is held. With appropriate excitation of the solenoid valve assembly 21, the Adjusting cylinder 20 via the line connection 23, the line connection 24 and the hose connection 22 is acted upon with compressed air, whereby it exits from the transverse grooves 35 Double pawl 19 spreads open. The plunger 10 is thus released and the spring brake cylinder can get into its braking position under the force of the storage spring 2, which is partially relaxing. ! laugh again Tensioning the accumulator spring 2 by means of the piston of the spring-loaded brake cylinder can be done by appropriate switching of the solenoid valve assembly 21 and what is caused thereby

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The actuating cylinder 20 is vented until the double pawl engages 19 in cLie transverse grooves 35 again in its release position locked v / earth.

The housing 5, 15 »16 can be used for maintenance work after loosening the screws 33 can be removed. For this purpose x ^ ird after previous Removal of the housing cover 16 or leaving it in place by turning the housing base part 5 around 90 around the bolt 10 relative to the housing bottom part 4- the Double pawl 19 spread open through the plunger cross-section 34-. The hat wedge guide 9> 10 prevents the plunger 10 from rotating at the same time. After the spreading effected in this way the double pawl 19 can continue to be advantageous at Pressurization of pressure medium on its piston, which is held in the release position, of the spring-loaded brake cylinder of the housing base part 5 together with all parts attached to it to the rear, that is, according to FIG. 1 to the right of the housing base part 4- removed v / earth.

When turning the two housing base parts 5 and 4 to each other these parts remain centered to one another by means of the cylindrical circumferential surface 12 and the rotary movement is by hitting the guide attachment 14 on the second, 3, the lower left end of the recess 13 is limited; a secure, complete spreading of the double pawl 19 is ensured in this way. After removing the housing 5, 15 »16 from the rest of the spring brake cylinder can the double! pawl 19 under the force of the back

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Adjusting spring of the adjusting cylinder 20 back into its blocking position Reach.

To achieve short maintenance times for the compressed air brake system an already overhauled housing part 5, 15 »16 can then be attached to the spring brake cylinder immediately afterwards and the removed housing part 5, 15 »16 can under favorable Under certain circumstances. When the housing part 5, 15, 16 is attached, the section 36 of the plunger 10 is initially flat insert between the double pawl 19. Go berserk of the housing 5 »15, 16 by 90 ° is then the double pawl 19 spread open and the housing 5 »15, 16 can completely are brought up to the spring brake cylinder and applied until the two housing base parts 4 and 5 lie flat on top of each other. During this shift takes effect the centering extension 7 enters the recess of the housing base part 5 and centers the latter and the guide extension 14 arrives into the recess 13. By turning the housing 5, 15, 16 until the guide extension 14 rests on the as in FIG. 3 shown right, upper end of the recess 13 is the Adjustment of the correct rotational position of the housing 5, 15, 16 together with its internals to the plunger 10 ensured; the The imt wedge guide 9, 11 also ensures the correct one here Location of plunger 10 and housing bottom part 4 and thus mediated the contact of the guide extension 14 at the end of the recess 13 also of the housing 5, 15 »16 to one another. Afterward l: ann the housing 5, 15, 16 by means of the screws 33 am Housing bottom part 4 attached to ground.

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By spreading the double pawl 19 by means of the Section 36 is attached when the housing 5, 15, 16 is attached the spring brake cylinder requires little installation space. If there is enough installation space available, the The plunger 10 instead of the section 36 also has a conical shape have tapering end, which allows the double pawl 19 to spread open when the housing 5, 15, 16 according to FIG. 1 from the right of the housing bottom part 4- is used; in this case there are no turning movements during the honing process, but the conical plunger end must have a length that is significantly greater than that of section 36 and that Housing 5 »15, 16 must therefore have a correspondingly substantial larger distance from the right to the case bottom part 4- will.

In order to achieve this when the housing is brought up to the bottom part of the housing of the rest of the spring brake cylinder a good one To achieve centering between the two, in modification of the Ausiührungsbeispiel described above, a training 6 according to FIG. Here, the guide extension 14- 'is attached to the housing bottom part 4' and engages an arcuate recess 13 'in the housing bottom part 5. The Führansatζ 14 'protrudes into the interior of the housing 5', 15, 16 'and ends in its interior. The tappet 10 'is at its rear end with a through the section 36 to the left beyond the transverse grooves 35 as shown in FIG Provide reaching axial bore 38, in which a on the housing cover 15 'attached Zcntrierctift 39 displaceable and

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engages rotatably. Otherwise, the spring brake cylinder corresponds according to FIG. 6 that according to FIGS. 1 and 2.

When the housing 5, 15, 16 'is attached to the housing base part 4', the centering pin 39 is initially inserted into the axial bore 38, whereby the housing 5, 15 »16 'is already centered relative to the remaining part of the spring brake cylinder. The guide extension 14 'is then inserted into the recess 13' and the housing 5, 15, 16 'is rotated until the guide extension 14' rests on one end of the recess 13 '; the housing 5, 15 »16 reaches a rotational position in which the section 36 between the pawl parts of the double pawl 19 is able to enter flatly - with axial displacement of the housing 5» 15 »16 'towards the housing bottom part 4'. The housing 5, 15, 16 'is now rotated through 90 ° until the guide extension 14' strikes the other end of the recess 13 '. The centering pin 39 engaging in the axial bore 33 ensures a rotation of the housing 5 »15» 16 'centered on the tappet 10' and thus the rest of the spring brake cylinder. During this rotation, the double pawl 19 is spread open. The housing 5 '15, 16' can now be completely ^{shifted to the left until the housing base parts 5 1 are} in contact with 4 'according to FIG. 6

a
v / ground, with the double pawl 19 reaching the area of the transverse grooves 35 and engaging in the corresponding position of the plunger 10 'when the spring brake cylinder is released. It should also be mentioned that the centering projection 7 is advantageous in the embodiment according to FIG. 6 as shown

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omitted, since the engagement of the centering pin 39 in cLie Axial bore 38 ensures adequate centering.

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Claims (9)

Künchen, November 10th, 1977 -1477- KNORR-BREMSE G.m.b.H. Moosacher Strasse 80 8000 Munich 40 Claims ./Spring brake cylinder for air brake systems from in particular rail vehicles, with one of compressed air against the force of a storage spring arranged in the cylinder housing actable piston and one locking the piston in its position when the accumulator spring is tensioned Locking device, vrelche a connected to the piston, a housing bottom supporting the accumulator spring displaced ": I penetrating plunger, one with a locking groove arranged near the end of the plunger cooperates to a Plunger eccentric, parallel axis on the side of the housing bottom facing away from the storage spring, pivotably mounted on this Locking pawl, an adjusting cylinder for pivoting the locking pawl, arranged on the side of the locking pawl on the housing base Valve devices for controlling the application of compressed air to the actuating cylinder, also on the housing base Sides of the pawl arranged, can be actuated by this, electrical switching devices for visual displays, and one the housing base with the pawl, the actuating cylinder, the having Housing declrel'T "covering valve and switching devices characterized in that the housing base (4, 5 or 4, 5 ') in v: e centlichen in a radial plane to the ram (10 or 10 ') - 2 909821/0159 is designed divided, the one part (4 or V) on the storage spring side firmly connected to the cylinder housing (1) in a manner known per se and the other part (5 or 5 ¹ ) on the pawl side with the housing cover (16 bzxv. 16 ') a closed we sent, the pawl (19), the actuating cylinder (20), the valve and switching devices (21 and 27) containing housing ^, 15, 16 or 16') forms which can be attached as a complete assembly to one part (4 or V) of the housing base (4, 5 or V, 5 ') and can be detachably connected to it. 2. Spring brake cylinder according to claim 1, characterized that one of the housing base parts has a centering shoulder (7) which is coaxial with the plunger (10) and has a cylindrical Has circumferential surface (12) which engages in a corresponding centering recess on the other housing bottom part (5). 3. Spring brake cylinder according to claim 2, characterized in that that an annular body is attached as a centering shoulder (7) to the housing bottom part (4) on the storage spring side. 4. Spring brake cylinder according to claim 1, characterized that the housing cover (16 ') and the plunger (10') by means of a coaxial to these, in a centering hole (33) engaging centering pin (39) mutually centered are. - 3 90982 1/0159 5. Spring brake cylinder according to claim 4, characterized in that the centering pin (39) is attached to the housing cover (16 ') and engages in an axial bore (38) in the tappet (1O ¹ ) serving as a centering bore. 6. Spring brake cylinder according to claim 2, 4 or 5 »characterized in that the pawl is designed as the plunger (10, .1O ¹ ) pincer-like encompassing, expandable double pawl (19) that the plunger (10, 10 ') is one of two has a mirror-image opposite double locking groove (35) formed by a web-like plunger cross-section (3 ^ ¹ ) completely separated from each other and that one of the housing base parts (5 or 4 ') is eccentric to the plunger (10, 10') and is eccentric to the other housing base -Part (4 or 5 ') has a protruding guide extension (14, 14') which is inserted into a guide track recess (13, 13 ') coaxial with the plunger (10, 10' and extending over an angular range of 90 ° in the shape of a circular arc) engages on the other housing bottom part (4 or 5 '). 7 spring brake cylinder according to claim 6, characterized in that that the plunger (10, 10 ') is guided non-rotatably in the housing bottom part (4, 4') on the storage spring side. 8. spring accumulator brake cylinder according to claim 7> characterized in that a housing bottom part with the storage spring side (4, 4 ') connected, in the direction of the accumulator spring (2) protruding, surrounding the plunger (10) pipe socket (3) - 4 909821/0159 _ Zj. - an opening of this housing base part (4, 4 ¹ ) protrudes, and that zv / isehen the pipe socket (8) and the plunger (10, 10 ') one of a longitudinal groove (9) in one and a wedge engaging in this ( 11) on the other of these two parts formed hat-wedge guide (9, 11) is arranged. 9. Spring brake cylinder according to claim 6, 7 or 8, characterized in that the plunger (10, 10 ') with a through bilateral, to the transverse grooves (35) of the double locking groove vertical recesses (37) flattened section (36) ends. 909821/0159