Calculation of Absorbed Energy for Stroke
Adjusting Unit with Built-in Shock Absorber
Unit: N
•
m
Absorption Capacity of Air Cushion and Stroke Adjusting Unit (MY3B)
Horizontal
Vertical
(downward)
Vertical
(upward)
Type of
collision
Kinetic
energy E
1
Thrust
energy E
2
Absorbed
energy E
F
•
s
F
•
s + m
•
g
•
s F
•
s - m
•
g
•
s
E
1
+ E
2
Symbols
υ
: Speed of impacting object (m/s)
m
: Weight of impacting object (kg)
F
: Cylinder thrust (N)
g
: Gravitational acceleration (9.8 m/s
2
)
s
: Shock absorber stroke (m)
υ
m
s
s
υ
m
s
υ
m
Air Cushion Stroke
Unit: mm
Bore size (mm)
16
25
40
63
Cushion stroke
13
18
25
30
Note) The maximum operating speed will differ when the stroke
adjusting unit is used outside the maximum fine stroke
adjustment range (with reference to the fixed stroke end),
such as at a fixed intermediate position (X416, X417).
(Refer to the graph above.)
Unit: mm
0 to -10
0 to -12
0 to -16
0 to -24
Stroke Adjusting Unit
Fine Stroke Adjustment Range
Bore size (mm)
16
25
40
63
Horizontal collision: P = 0.5 MPa
MY3B25
Load weight (kg)
Collision speed (mm/s)
2000
1000
500
400
300
200
100
80
5
10
20
50
4
3
2
1
m
3
max
m
2
max
m
1
max
H unit
Air cushion, L unit
Horizontal collision: P = 0.5 MPa
MY3B40
Load weight (kg)
Collision speed (mm/s)
2000
1000
500
400
300
200
100
80
5
10
20
30 40
4
3
2
1
m
3
max
m
2
max
m
1
max
Maximum collision speed (H, L)
with fixed intermediate position
H unit
Air cushion, L unit
Horizontal collision: P = 0.5 MPa
MY3B63
Load weight (kg)
Collision speed (mm/s)
2000
1000
500
400
300
200
100
80
5
10
20
30 40
100
4
3
2
m
3
max
m
2
max
m
1
max
H unit
Air cushion, L unit
Horizontal collision: P = 0.5 MPa
MY3B16
Load weight (kg)
Collision speed (mm/s)
2000
1000
500
400
300
200
100
80
0.3
4
5
10
3
2
0.4
1
0.2
m
3
max
m
2
max
m
1
max
Maximum collision speed
(L) with fixed interme-
diate position
H unit
Air cushion
L unit
6
Series
MY3A/3B
Cushion Capacity
Maximum collision speed (H)
with fixed intermediate position
Maximum collision speed (H, L)
with fixed intermediate position
(Refer to Note 4 on
Front matter 2.)
Maximum collision speed (H, L)
with fixed intermediate position
m
•
υ
2
1
2
Note) The speed of the impacting object is
measured at the time of collision with the
shock absorber.
Note) With an operating pressure of 0.6 MPa or
larger, the use of a cushion or an external
shock absorber conforming to the
conditions on page 7 is recommended.
Fine stroke adjustment range (mm)
MY3A3B.qxd 06.2.17 9:13 AM Page 14
