Bosch Rexroth AG
, RE 15197/02.2017
2
MCR-C
| Radial piston motor for compact drives
Functional description
Functional description
Hydraulic motors of the type MCR-C are radial piston
motors with rear case mounting and fl anged drive shaft.
These motors have a compact front housing and are
intended for drives in open or closed circuits. These motors
are used in a wide range of applications where there is
lower external loading. The integrated fl ange with wheel
studs allows easy installation of standard wheel rims.
Construction
Two part housing (
1, 2
), rotary group (
3
,
4, 8
), cam (
5
),
drive shaft (
6
) and fl ow distributor (
7
).
Transmission
The cylinder block (
4
) is connected to the shaft (
6
) by
means of splines. The pistons (
8
) are arranged radially in
the cylinder block (
4
) and make contact with the cam (
5
)
via rollers (
3
).
Torque generation
Working
stroke
Return
stroke
Feed
Return
The number of working and return strokes corresponds to
the number of lobes on the cam multiplied by number of
pistons in the cylinder block.
Flow paths
The ports
A
and
B
, which are located in the rear case, carry
oil through the distributor to the cylinder chambers (
E
).
Bearings
Tapered roller bearings capable of transmitting high axial
and radial forces are fi tted as standard.
Freewheeling
In certain applications there may be a requirement to free-
wheel the motor. This may be achieved by connecting ports
A
and
B
to zero pressure and simultaneously applying a
pressure of 2 bar to the housing through port
L
. In this
condition, the pistons are forced into the cylinder block
which forces the rollers to lose contact with the cam thus
allowing free rotation of the shaft.
2
8
1
E
6
5
D D D 7 D
5
3
4
B
A
A B
L
