Claims
- 1. A fluid apparatus comprising:
a shaft disposed to be rotatable; a plurality of pistons disposed to be reciprocated; a housing for containing the shaft, the housing having a plurality of cylinder bores in which the pistons are disposed; a rotary member rotatable integrally with the shaft, the rotary member having a slant surface slanting with respect to a center axis of the shaft; a swing member connected to the slant surface of the rotary member through a thrust bearing, the swing member swinging in accordance with rotation of the rotary member, for reciprocating the pistons; a swing support mechanism for supporting the swing member in capable of swinging, the swing support mechanism having
a first rotation member rotatable about a first axial line that is vertical to the center axis of the shaft, a lock member connected to the first rotation member, for restricting the first rotation member from rotating about the center axis of the shaft, and a second rotation member connected to the first rotation member to be rotatable about a second axis that is vertical to the center axis and crosses with the first axis, the second rotation member being connected to the swing member, wherein:
the rotary member, the thrust bearing, the swing member and the second rotation member are disposed to construct a variable mechanism portion; the swing support mechanism has a slant center around which the swing member swings; and the slant center is positioned substantially at a center of gravity of the variable mechanism portion.
- 2. The fluid apparatus according to claim 1, wherein the slant center is a crossing point between the first axis and the second axis.
- 3. The fluid apparatus according to claim 1, wherein the second rotation member generally has a cylindrical shape in which two ends in its axial direction are opened.
- 4. The fluid apparatus according to claim 3, further comprising
a plurality of connection rods for connecting the swing member and the pistons, wherein the slant center is positioned opposite the pistons with respect to a connection line passing through connection centers between the swing member and the connection rods.
- 5. A fluid apparatus comprising:
a shaft disposed to be rotatable; a plurality of pistons disposed to be reciprocated; a housing for containing the shaft, the housing having a plurality of cylinder bores in which the pistons are disposed; a rotary member rotatable integrally with the shaft, the rotary member having a slant surface slanting with respect to a center axis of the shaft; a swing member connected to the slant surface of the rotary member through a thrust bearing, the swing member swinging in accordance with rotation of the rotary member, for reciprocating the pistons; a swing support mechanism for supporting the swing member in capable of swinging, the swing support mechanism having
a first rotation member rotatable about a first axial line that is vertical to the center axis of the shaft, a lock member connected to the first rotation member, for restricting the first rotation member from rotating about the center axis of the shaft, and a second rotation member connected to the first rotation member to be rotatable about a second axis that is vertical to the center axis and crosses with the first axis, the second rotation member being connected to the swing member, wherein:
the rotary member, the thrust bearing, the swing member and the second rotation member are disposed to construct a variable mechanism portion; and a crossing point between the first axis and the second axis substantially corresponds to a center of gravity of the variable mechanism portion.
- 6. A fluid apparatus comprising:
a shaft disposed to be rotatable; a plurality of pistons disposed to be reciprocated; a housing for containing the shaft, the housing having a plurality of cylinder bores in which the pistons are disposed; a swash plate rotatable integrally with the shaft for reciprocating the pistons, the swash plate slanting with respect to a center axis of the shaft; and a shoe disposed at a radial outside portion of the swash plate to pinch the swash plate while slidably contacting the swash plate, wherein:
the swash plate and the pistons are connected through the shoe to be reciprocated; and the swash plate has a slant center about which the swash plate rotates while slanting, and the slant center substantially corresponds to a gravity center of the swash plate.
- 7. The fluid apparatus according to claim 6, further comprising
a balancer that adjusts the slant center of the swash plate at a position substantially corresponding to the gravity center of the swash plate, regardless of a slant angle of the swash plate with respect to the center axis of the shaft.
- 8. The fluid apparatus according to claim 6, wherein the gravity center of the swash plate is substantially on the center axis of the shaft.
- 9. The fluid apparatus according to claim 7, wherein:
the swash plate includes a circular plate having a slide surface slidably contacting the shoe, and an arm for transmitting rotation of the shaft to the circular plate, the arm being integrated to the circular plate at a position offset from a center of gravity in the circular plate; and the balancer is provided in the circular plate at a position except for the slide surface.
- 10. The fluid apparatus according to claim 7, wherein the balancer is provided in the circular plate on the same side as the arm with respect to a center line of the circular plate.
- 11. The fluid apparatus according to claim 7, wherein the balancer is provided in the circular plate at a side opposite the arm with respect to a center line of the circular plate.
- 12. The fluid apparatus according to claim 7, wherein the balancer is provided on the circular plate at an outer periphery.
- 13. A fluid apparatus comprising:
a shaft disposed to be rotatable; a plurality of pistons disposed to be reciprocated; a housing for containing the shaft, the housing having a plurality of cylinder bores in which the pistons are disposed; a swash plate rotatable integrally with the shaft for reciprocating the pistons, the swash plate slanting with respect to a center axis of the shaft; and a shoe disposed at a radial outside portion of the swash plate to pinch the swash plate while slidably contacting the swash plate, wherein:
the swash plate and the pistons are connected through the shoe to be reciprocated; and the swash plate has a gravity center that is substantially on the center axis of the shaft.
Priority Claims (2)
Number |
Date |
Country |
Kind |
2002-155162 |
May 2002 |
JP |
|
2003-82576 |
Mar 2003 |
JP |
|
CROSS-REFERENCE TO RELATED APPLICATION
[0001] This application is related to and claims priority from Japanese Patent Applications No. 2002-155162 filed on May 29, 2002, and No. 2003-82576 filed on Mar. 25, 2003, the contents of which are hereby incorporated by reference.