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7 - 1
Drive Motor Operation
Note:
On the illustration below, the main parts of the motor
are shown slightly separated for purposes of explanation.
Basically, this type of motor comprises a gearwheel set
D
which is connected by a valve drive
E
to a disc valve
F
.
The gearwheel set consists of a toothed internal gear (the
rotating part) and a fixed external gear rim whose 'teeth' are
formed by rollers. The internal gear is free to rotate in a
circular orbit within the gear rim.
The disc valve is arranged to create a series of inlets and
outlets which, as the gear rotates, always align precisely
with the chambers formed between the internal gear teeth
and the gear rim rollers.
Key
A
Output Shaft
B
Brake Pack
C
Cardan Shaft
D
Gearwheel Set
E
Valve Drive
F
Disc Valve
Oil under pressure passes through the disc valve inlets to the
inter-tooth chambers on one side of the gearwheel set.
These chambers are so shaped that the oil pressure within
them creates an imbalance of forces which causes the
internal gear to rotate. As the gear rotates the oil in the
chambers is progressively connected to the disc valve
outlets, from where it returns to tank.
A cardan shaft
C
connects the inner gear to the output shaft
A
.
Brake pack
B
comprises a series of alternate friction plates
and brake plates. The brake is normally held 'on' by spring
force and released by hydraulic pressure.
Motors fitted to later machines have a slightly different
construction but the working principles are the same.
Section E
Hydraulics
9803/8500
Section E
7 - 1
Issue 2*
Descriptions
S167740
*
*
Summary of Contents for ROBOT 150
Page 2: ......
Page 21: ...5 2 Safety Decals cont d Section 2 Care and Safety 9803 8500 Section 2 5 2 Issue 2...
Page 77: ...Attachments Section A Section A 7 7 9803 8500 Issue 1 Backhoe...
Page 97: ...4 3 Section C Electrics 9803 8500 Section C 4 3 Issue 1 Alternator S213570...
Page 123: ...1 1 Section D Controls 9803 8500 Section D 1 1 Issue 1 Safety Restraint Bar S168160 1...
Page 125: ...2 1 Section D Controls 9803 8500 Section D 2 1 Issue 1 Throttle Controls S168150D...
Page 142: ...Hydraulics 9803 8500 Issue 1 4 1 4 1 Descriptions Section E Section E...
Page 145: ...Hydraulics 9803 8500 Issue 2 5 2 5 2 Descriptions Section E Section E...
Page 146: ...Hydraulics 9803 8500 Issue 2 5 3 5 3 Descriptions Section E Section E...
Page 149: ...Hydraulics 9803 8500 Issue 2 5 6 5 6 Descriptions Section E Section E...
Page 152: ...Hydraulics 9803 8500 Issue 1 5 9 5 9 Descriptions Section E Section E...
Page 163: ...10 1 Section E Hydraulics 9803 8500 Section E 10 1 Issue 1 Pumps 168150...
Page 165: ...10 3 Section E Hydraulics 9803 8500 Section E 10 3 Issue 1 Pumps 168030...
Page 167: ...10 5 Section E Hydraulics 9803 8500 Section E 10 5 Issue 1 Pumps 168160...
Page 175: ...11 1 Section E Hydraulics 9803 8500 Section E 11 1 Issue 2 Pumps 167750...
Page 179: ...13 1 Section E Hydraulics 9803 8500 Section E 13 1 Issue 1 Drive Motors 167720 S167720A...
Page 183: ...13 5 Section E Hydraulics 9803 8500 Section E 13 5 Issue 1 Drive Motors S243720 X X S243870...
Page 212: ...18 1 Section E Hydraulics 9803 8500 Section E 18 1 Issue 2 Valves S204980 X X 3 B A 4 2 1 5...
Page 215: ...20 1 Section E Hydraulics 9803 8500 Section E 20 1 Issue 1 Servo Joysticks S167960...
Page 217: ...20 3 Section E Hydraulics 9803 8500 Section E 20 3 Issue 1 Servo Joysticks 167950...
Page 221: ...23 3 Section E Hydraulics 9803 8500 Section E 23 3 Issue 1 Rams S167800...
Page 241: ...1 2 Section F Transmission 9803 8500 Section F 1 2 Issue 2 Tyres and Wheels 167861 167811...
Page 243: ...1 4 Section F Transmission 9803 8500 Section F 1 4 Issue 2 Tyres and Wheels 167851...
Page 253: ...2 1 Section K Engine 9803 8500 Section K 2 1 Issue 1 Removal and Replacement S167990...