Spring brake cylinder with an emergency release device

Spring brake cylinder according to one of the preceding claims,

• characterized in that the holding device (30) has a detent pawl (30) acting upon a gear wheel (48).

Spring brake cylinder according to one of the preceding claims,

• characterized in that the holding device (30) is designed to be rotating and/or linear and/or clamping and permits several holding positions.

Spring brake cylinder according to one of the preceding claims,

• characterized by at least one spring (44, 46) in the flux of force of the emergency release device for avoiding intermediate conditions of the detent pawl (30).

Spring brake cylinder according to one of the preceding claims,

• characterized in that the force of the spring-loaded spring (14, 16) is supported by way of the spring-loaded piston (6) either on the pressure space (18) or by way of a piston rod (24) on the spring-loaded piston (6).

Spring brake cylinder according to one of the preceding claims,

• characterized in that, in the flux of force between the spring-loaded piston (6) and the piston rod (24), as an element of the emergency release mechanism, a threaded spindle (32) is arranged.

Spring brake cylinder according to one of the preceding claims,

• characterized in that the torque of the threaded spindle (32) is transmitted by way of a displaceable guide (34) with an adjusting spring (36) to the gear wheel (38) which can be locked by the detent pawl (30).

Spring brake cylinder according to one of the preceding claims,

• characterized in that the emergency release operating unit has a driving device (40) for driving the detent pawl (10), a Bowden cable (42) and at least one restoring spring (44) and a pressure spring (46) on the Bowden cable (42).

Spring brake cylinder according to one of the preceding claims,

• characterized the locking bar (48) essentially has a bolt-type shape and, at its end facing the housing cover section (10b), is equipped with a locking bar head (51) which is designed for engaging in a recess (35) of detent pawl (39).

Spring brake cylinder according to one of the preceding claims,

• characterized in that a locking bar spring (49) is arranged between the housing cover (10a, 10b) and the locking bar (48), which locking bar spring (49) presses the locking bar (48) in the direction of the detent pawl (30).

Spring brake cylinder according to one of the preceding claims,

• characterized in that the locking bar (48) can be displaced by the spring-loaded piston (6) from its locking position in the detent pawl (30).

Spring brake cylinder according to one of the preceding claims,

• characterized in that, in the flux of force between the spring-loaded piston (6) and the piston rod (24), a free running device (52) is provided for the gear wheel (38).

Spring brake cylinder according to one of the preceding claims,

• characterized in that the free running device is constructed as a cone clutch (52).

Spring brake cylinder according to one of the preceding claims,

• characterized in that the detent pawl (30) and the locking bar (48) are arranged on the piston rod (24).

Spring brake cylinder according to one of the preceding claims,

• characterized in that the locking bar (48) can be operated by the threaded spindle (32) connected with the spring-loaded piston (24).

Spring brake cylinder according to one of the preceding claims,

• characterized by a display device (54) for displaying the operating condition of the emergency release device.

Spring brake cylinder according to one of the preceding claims,

• characterized in that the detent pawl (32) is arranged on a holding plate (56) which is radially displaceable in a cylindrical attachment (63) of the cylinder housing (4) such that, as a result of a radial displacing of the holding (56) and of the detent pawl (30), the gear wheel (30′) releases or blocks.

Spring brake cylinder according to one of the preceding claims,

• characterized in that the locking bar (48) is arranged on the piston rod (24) and is designed for, in an operating position, engaging in a recess of the holding plate (56) and radially locking the latter.

Spring brake cylinder according to one of the preceding claims,

• characterized in that the locking bar (48) is swivellably disposed on the piston rod (24) such that, during axial movements of the piston rod, it can be swivelled from the cylinder housing (4) into and out of a recess of the holding plate (56).