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1. (WO2015043970) COMBINED SERVICE BRAKE AND SPRING BRAKE CYLINDER HAVING CRIMPING BETWEEN THE SERVICE BRAKE CYLINDER AND AN INTERMEDIATE WALL

Pub. No.:    WO/2015/043970    International Application No.:    PCT/EP2014/069369
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Fri Sep 12 01:59:59 CEST 2014
IPC: B60T 17/08
B21D 39/04
Applicants: KNORR-BREMSE SYSTEME FÜR NUTZFAHRZEUGE GMBH
Inventors: HERICHER, Stephane
Title: COMBINED SERVICE BRAKE AND SPRING BRAKE CYLINDER HAVING CRIMPING BETWEEN THE SERVICE BRAKE CYLINDER AND AN INTERMEDIATE WALL
Abstract:
The invention relates to a combined service brake and spring brake cylinder (1), comprising a) a membrane (24) arranged in a housing (2A) of the service brake cylinder (2), which membrane (24) delimits an aeratable and ventable service brake chamber (20), and which membrane (24) is held on the housing (2A) of the service brake cylinder (2) by the fastening edge (32) of the membrane (24) and has effect on a membrane plate (26) connected to a service brake piston rod (28), and b) comprising a spring brake piston (8) having a spring brake piston rod (18), which spring brake piston (8) is arranged in a housing (4A) of the spring brake cylinder (4) and borders an aeratable and ventable spring brake chamber (12) which can be actuated by at least one pre-loaded spring (10), wherein c) the spring brake piston rod (18) protrudes through a central piston rod bore (21) of an intermediate wall (6) between the service brake cylinder (2) and the spring brake cylinder (4), such that the spring brake piston rod (18) has effect on the membrane plate (26), d) wherein the intermediate wall (6) has a first edge flange (38) on which the fastening edge (32) of the membrane (24) is mounted, and e) the housing (2A) of the service brake cylinder (2) consists of a malleable material and has an edge flange (36). According to the invention, f) the edge flange (36) of the housing (2A) of the service brake cylinder (2) is shaped, via plastic deformation, around the fastening edge (32) of the membrane (24), first of all, and around the first edge flange (38) of the intermediate wall (6), second of all, such that the housing (2A) of the service brake cylinder (2) is connected to the intermediate wall (6), first of all, and the fastening edge (32) of the membrane (24) is second of all held between the edge flange (36) of the housing (2A) of the service brake cylinder (2) and the first edge flange (38) of the intermediate wall, in a form-fitting manner.