10-21
SK714-5 SK815-5 SK815-5 turbo
SK815-5 – SK815-5 turbo (STANDARD FLOW AND HIGH FLOW)
SK714-5
FUNCTION
•
The rotation and torque transmitted to the pump shaft is converted into hydraulic energy, and pressurized oil is di-
scharged according to the load.
•
It is possible to change the discharge amount by changing the swash plate angle (plus, zero and minus)
RKS00351
14
1
3
4
2
5 6
15
11
7
A
12
10 13
8
9
15
(Standard version)
(High-flow version )
STRUCTURE AND FUNCTION
HYDRAULIC PUMP
1. Shaft
2. Case
3. Cradle bearing
4. Rocker cam
5. Control piston
6. Slider
7. Shoe
8. Piston
9. Cylinder block
10. Valve plate
11. Main bearing
12. Spline
13. Sub bearing
14. Charge pump
15. Work equipment pump
STRUCTURE
•
Cylinder block (9) is supported to shaft (1) by a spline
(12), and shaft (1) is supported by the front and rear
bearings (11), (13). The tip of piston (8) is a concave
ball, and shoe (7) is caulked to it to form one unit.
Piston (8) and shoe (7) form a spherical bearing.
•
Rocker cam (4) has flat surface
A
, and shoe (7) is
always pressed against this surface while sliding in a
circular movement.
There is a cradle bearing (3) between cradle and roc-
ker cam (4) which is secured to the case.
Rocker cam (4) sways on cradle bearing.
•
Piston (8) carries out relative movement in the axial
direction inside each cylinder chamber of cylinder
block (9).
•
The cylinder block seals the pressurized oil to valve
plate (10) and carries out relative rotation. This sur-
face is designed so that the oil pressure balance is
maintained at a suitable level. The oil inside each
cylinder chamber of cylinder block (9) is sucked in and
discharged through valve palte (10).
Содержание SK714-5
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