| 摘要 |
<p>1280685 Regulating braking in dependence on vehicle load KNORR-BREMSE GmbH 25 July 1969 [26 July 1968] 37499/69 Headings G1W WE3K6H WE3JX WE3R4 and WE3C2B A load sensitive device for a vehicle (e.g. a rail vehicle) is mounted between the vehicle frame 4 and a spring suspension 2 on the running gear 3 and comprises valves 62, 64 and 68, 8 for controlling the pressure in a chamber 6 which is connected by a connection 7 to a braking device (not shown) the chamber 6 being closed by a diaphragm 8 which is loaded in proportion to the vehicle weight by an elastomeric element, 12<SP>1</SP>, situated between the diaphragm 8 and a pressure plate 9 bearing on the spring suspension 2, an element 11<SP>1</SP> also being provided which transmits the vehicle weight to the spring suspension 2 and thence to the elastic element 12<SP>1</SP>. When the load on the vehicle frame 4 is increased the element 11<SP>1</SP> is subjected to increased pressure, a certain fraction of which is transmitted via the element 12<SP>1</SP> to the diaphragm 8 to thereby lift a valve tube 63 and open the valve 62, 64; compressed air then enters chamber 6 through a conduit 71 until the pressure has increased sufficiently to return the diaphragm 8 to its original position and close the valve 62, 64. When the vehicle load is decreased the resulting excess pressure in chamber 6 causes the diaphragm 8 to move away the valve tube 63 to thereby connect the chamber 6 to atmosphere; compressed air will then leave the chamber 6 until the pressure has been reduced sufficiently to return the diaphragm 8 to its original position. In the embodiment of Fig. 2 a self-lapping valve 35 is openable on increasing the vehicle load to allow air to enter a chamber 26 which air then acts via a diaphragm 17 on a double piston 21, 24. The double piston 21, 24 thereupon presses on a cylindrical rubber element 22 with a force which is reduced on decrease of the vehicle loading to close the valve 35. The element 22 is arranged within an annular element 23 which is compressed by a housing ring 16 to an extent dependent upon vehicle load to cause compression of the element 22. The two elements 22, 23 may be replaced by a continuous rubber element.</p> |
