DE1555562B

DE1555562B - Pressure medium brake system for vehicles with a spring accumulator that is to be tensioned via the pressure medium

Info

Publication number: DE1555562B
Authority: DE
Inventors: Heinz 6900 Heidelberg; Beigel Franz 6909 Malschenberg. B60t 17-22 Nicolay
Original assignee: Graubremse Gmbh, 6900 Heidelberg

Description

3 43 4

wird. Das Fahrzeug läßt sich dann ungebremst wie- Im übrigen ist bei der Anordnung gemäß F i g. 2 der bewegen. Sobald die Störung in der Druckmit- noch eine zusätzliche Spannmöglichkeit für den Fetelbremsanlage behoben ist und der Hauptluftbehäl- derspeicher 12 vorgesehen, insofern, als hier außer ter 19 wieder gefüllt ist, kann auch eine erneute dem Hauptluftbehälter 19 noch ein Reserveluftbe-Beaufschlagung des Federspeicherzylinders mit 5 halter 32 vorgeschaltet ist, was indessen nicht GeDruckluft erfolgen, wodurch der Kolben 14 erneut genstand der Erfindung ist.will. The vehicle can then be unbraked like- In the rest of the arrangement according to FIG. 2 the move. As soon as the disturbance in the pressure with an additional tensioning option for the fetel brake system is fixed and the main air reservoir 12 is provided, insofar as here except ter 19 is filled again, the main air tank 19 can also be charged with reserve air again of the spring-loaded cylinder with 5 holder 32 is connected upstream, which, however, is not GeDruckluft take place, whereby the piston 14 is again the subject of the invention.

beaufschlagt und die Feder 13 wieder gespannt wird. Der Reserveluftbehälter 32 kann vom Hauptluft-Die Stellschraube 11 wird nunmehr wieder auf das behälter getrennt gespeist werden, oder er wird vom erforderliche Maß angezogen, damit bei einer er- Hauptluftbehälter aus über die Leitung 36 und ein neuten Bremsung die normalen Bremsverhältnisse io Überströmventil 35 mit Druckluft beschickt. In die wieder vorhanden sind. vom Hauptluftbehälter 19 zum Federspeicherzylin-Bei der Anordnung gemäß F i g. 2 ist zwischen der führende Druckluftleitung 18 ist ein Zweiwegedie nach den Radbremszylindern führenden Brems- ventil 30 eingeschaltet, an welches gleichzeitig über stangen 28 und 29 ein Umlenkheben 27 eingeschal- eine Leitung 31 der Reserveluftbehälter angeschlostet, der auf einer Drehachse 26 lagert. An den Um- 15 sen ist. In der Leitung 31 liegt ein mit einem Handlenkhebel 27 greift gleichzeitig ein aus den beiden hebel 34 ausgestattetes Handventil 33.
Teilen 20 und 25 gebildetes Bremsseil an, welches Normalerweise erfolgt das Aufladen des Federmit seinem Ende mit der Kolbenstange 17 des Feder- Speicherzylinders 12 mit Druckluft vom Hauptluftspeicherkolbens verbunden ist. Zwischen die beiden behälter 19 aus. Der Reserveluftbehälter 32 ist in Bremsseile 20 und 25 sind die beiden Hebel 21 und 20 diesem Falle immer mit Druckluft beschickt. Fällt 22, welche frei drehbar auf der Achse 23 lagern, ein- der Hauptluftbehälter aus oder entweicht das Druckgeschaltet. Beide Hebel stützen sich über die Stell- mittel aus dem Bremssystem des Fahrzeuges, so schraube 24 gegeneinander ab. Durch Herausdrehen kommt die Speicherfeder zur Wirkung, die sich ent- oder Einschrauben der Stellschraube 24 läßt sich spannt und die Bremsen anzieht. Soll die Bremse die Länge des Bremsgestänges verändern. Wenn der 25 wieder gelöst werden, so kann das in erfindungs-Federspeicherzylinder ohne Druckluft ist, entspannt gemäßer Weise durch Nachlassen der Stellschraube sich die Speicherfeder, so daß der Kolben mit der 24 an den Hebeln 21, 22 geschehen, oder man beKolbenstange 17 in den Zylinder des Federspei- nutzt die zusätzliche Spannmöglichkeit über den Rechers 12 völlig eingefahren ist. Dies hat ein Anzie- serveluftbehälter und das Handventil 33, indem man hen der Bremse zur Folge. Durch Nachlassen bzw. 30 aus dem Reserveluftbehälter 32 Druckluft in den Herausdrehen der Stellschraube 24 lassen sich die Federspeicherzylinder einläßt und damit über den Bremsen wieder lösen. Kolben die Speicherfeder wieder spannt.applied and the spring 13 is tensioned again. The reserve air tank 32 can be fed separately from the main air - the adjusting screw 11 is now again on the tank, or it is tightened to the required extent so that the normal braking conditions io overflow valve 35 with a main air tank from via line 36 and a new braking Compressed air charged. In which are present again. from the main air reservoir 19 to the spring-loaded cylinder with the arrangement according to FIG. 2, between the leading compressed air line 18, a two-way brake valve 30 leading to the wheel brake cylinders is switched on, to which at the same time a deflecting lift 27 is connected via rods 28 and 29, a line 31 of the reserve air tank, which is supported on an axis of rotation 26. At the round is 15. In the line 31 is a manual lever 27 with a manual lever 27 simultaneously engages a manual valve 33 equipped with the two levers 34.
Share 20 and 25 formed brake cable, which normally takes place the charging of the spring with its end connected to the piston rod 17 of the spring storage cylinder 12 with compressed air from the main air storage piston. Between the two containers 19 from. The reserve air tank 32 is in the brake cables 20 and 25, the two levers 21 and 20 are always charged with compressed air in this case. If 22, which are freely rotatable on the axis 23, fail in one of the main air tanks or the pressure switch escapes. Both levers are supported by the adjusting means from the vehicle's braking system, so 24 screw against each other. By unscrewing the storage spring comes into effect, which can be unscrewed or screwed in the adjusting screw 24, tensioned and the brakes applied. Should the brake change the length of the brake linkage. If the 25 are released again, this can be done in the invention spring-loaded cylinder without compressed air, relaxes the storage spring in a corresponding manner by releasing the adjusting screw, so that the piston with the 24 is done on the levers 21, 22, or you can be piston rod 17 in the The cylinder of the spring feeder uses the additional tensioning possibility via the rake 12 is completely retracted. This results in an air reservoir and manual valve 33 by applying the brake. By releasing or 30 compressed air from the reserve air tank 32 by unscrewing the adjusting screw 24, the spring-loaded cylinders can be let in and thus released again via the brakes. Piston tensions the accumulator spring again.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

1 2 blocked so that the brake is applied. These claims: You can intervene by turning a difficult to access adjusting screw on each spring

1. Hydraulic brake system for vehicles with locking cylinders are canceled.

one to be excited about the pressure medium and 5 the object of the invention is to address the disadvantages of when braking partially or completely to avoid bleeding known devices and a the spring accumulator, which in the event of failure of the particularly simple and easily accessible possible pressure medium the brakes are applied and the length of the transmission brake linkage changes in a speed is arranged, which to create the Lö- stänges. It must be used for shunting purposes the brake through an adjustable transmission multiple release and application of the brake - Transmission lever arrangement around the spring travel of the even with a defective or non-existent pressure accumulator spring is variable in length, thereby air system - be possible.

characterized in that two levers (4; 9) This is achieved according to the invention,

or 21; 22) the transmission lever assembly that two levers of the transmission lever assembly

15 adjustable relative to one another by means of an adjusting screw (11 or 24)

other are adjustable. are.

2. Pressure medium brake system according to claim 1, the advantage of the design according to the invention characterized in that when switched on lies in the great simplicity of the arrangement, the the spring accumulator pressurized with pressure medium good accessibility and the safe and war- (12 to 15) between the 20 unobstructed operation options belonging to an axis. Through the Angen Wheel brakes two brake shafts (2 and 3) with the order of the adjusting screw in the transmission device Actuating levers (8 and 9) for the rod can always use several wheel brakes at the same time at which the spring retainer can be loosened or tightened.

rather (12 to 15) attacks, with one of the loading The invention allows various execution control levers (9) is loosely rotatable and on the 25 possibilities, two of which are in the drawing as belonging Brake shaft (2) another lever are given. It shows:

(10) is wedged, which via the adjusting screw (11) F i g. 1 is a schematic representation of an over

supports the loose actuating lever (9). an axis arranged spring accumulator, wherein in

the brake linkage is a variable-length link

30 is switched on,

F i g. 2 a braking device with a spring

The invention relates to a pressure medium brake accumulator which is equipped with an additional compressed air tank

location for vehicles cooperates with one over the pressure medium ter, over which in the event of failure of the

to be tensioned and when braking partially or with compressed air the spring accumulator must be re-tensioned

spring accumulator that can be completely vented, which at 35 can.

Failure of the pressure medium applies the brakes and with the arrangement according to FIG. 1 store on the

is arranged in a brake linkage, which to axis 1, the two brake shafts 2 and 3 on which

Release the brake by means of an adjustable transmission, a lever 4 or 5 is wedged on, which is its-

lever arrangement connected to a brake rod 6 or 7 by about the spring deflection.

Storage spring is variable in length. 4 ° are the ones that operate the wheel brakes

The purpose of the release devices is to be the. The brake shaft 3 is firmly wedged case of the pressure medium system through the spring accumulator an actuating lever 8, while the corresponding Cancel the induced braking position in order to freely rotate the driving operating lever 9 on the brake shaft 2 to make maneuverable. The well known bar is. The operating lever 9 lies against a mechanical release devices use this 45 adjusting screw 11, which is firmly attached to the Bremsdirekt on the piston of the spring accumulator. shaft 2 wedged on further lever 10 screwed in

Thus, the German patent specification 213 387 shows a is. Between the two operating levers 8 and 9

Manual release device for compressed air spring brakes, where is the spring accumulator 12 with the one inserted in it

in each spring-loaded cylinder with a Löseein- storage spring 13 and the piston 14 and the

direction is provided. There is a slot-like 50 compressed air connection 15 to which the compressed air line 18

Slot connection use that is simply disconnected, following the main air reservoir

can be solved, but is usually difficult to access. Multiple 19 of the pressure medium brake system of the vehicle

multiple braking processes with a defective compressed air system,

are not possible. Compressed air is supplied from the main air tank 19

There is also a combined brake actuation 55 via the compressed air line 18 and the connection 15 cylinder with compressed air failure lock according to introduced into the cylinder of the spring accumulator, Wodeutscher Auslegeschrift 1186 757 known. This is acted upon by the piston 14 and works against the system but, in contrast to the usual effect, the accumulator spring 13 is pushed back. Spring-loaded brake systems, with an actuating cylinder designed as a mem- In normal driving operation, the storage spring 13 is a branch cylinder, which continues to be tensioned in this way. If the cylinder is to be actuated by an increase in compressed air and thus that of the spring accumulator is vented, ie the piston applies the brake. The brake linkage is released at 14, so the accumulator spring, the piston rod of the actuating cylinder connected 13, relaxes and pulls over the interposed. The actuating cylinder is combined with a lock designed as a spring brake linkage 16, 17 and parts 2 to 9 in a memory, with the wheel brakes on both sides.
with the piston rod of the spring-loaded locking device. If the brakes are to be released, the brake cylinder only needs to be loosened when the pressure drops in the movement