1. A hydraulic pump unit for mounting on a frame of a vehicle, the pump unit comprising:
an end cap having a first side, a second side and porting formed within the end cap;
a pump housing attached to the first side of the end cap, the pump housing including a pump chamber formed therein;
a gear chamber cover attached to the second side of the end cap and forming a gear chamber therein;
first and second hydraulic pumps rotatably mounted in the pump chamber, the hydraulic pumps being mounted on the first side of the end cap and driven by respective pump shafts;
an auxiliary pump mounted to the first side of the end cap, and in fluid communication with the first and second hydraulic pumps, and being driven by an auxiliary shaft;
a gear set mounted in the gear chamber and drivingly engaged to each of the pump shafts and the auxiliary shaft; and
a main drive shaft drivingly engaged to the gear set, where the pump shafts and auxiliary shaft are driven by the main drive shaft and where the main drive shaft has a first end extending from the pump housing and directly coupled to a prime mover.
2. A hydraulic pump unit as set forth in claim 1, further comprising a power take off unit having an output shaft, the power take off unit being mounted to the gear chamber cover and the output shaft being drivingly and removably coupled to the main drive shaft.
3. A hydraulic pump unit as set forth in claim 2, wherein one of the pumps provides control pressure for the power take off unit.
4. A hydraulic pump unit as set forth in claim 2, wherein the auxiliary pump provides control pressure for the power take off unit.
5. A hydraulic pump unit as set forth in claim 2, further comprising a clutch for engaging and disengaging the output shaft to the main drive shaft.
6. A hydraulic pump unit as set forth in claim 2, further comprising a fan mounted on the output shaft.
7. A pump apparatus, the pump apparatus comprising:
a main input shaft engaged to and driving a drive mechanism;
a first pump having a first pump shaft driven by the drive mechanism;
a second pump having a second pump shaft driven by the drive mechanism;
an auxiliary pump having an auxiliary pump shaft driven by the mechanism; and
a common end cap defining porting and supporting the first pump, the second pump and the auxiliary pump;
wherein the auxiliary pump, first pump and second pump are disposed on a first side of the end cap and the auxiliary pump is in fluid communication with the first and second pumps, and the drive mechanism is located on a second side of the end cap opposite to the first side.
8. A pump apparatus as set forth in claim 7, wherein the pump apparatus is attached to a prime mover having a prime mover output, where the prime mover output and the main input shaft are coaxial.
9. A pump apparatus as set forth in claim 8, wherein the pump apparatus is attached to the prime mover by a bell housing.
10. A pump apparatus as set forth in claim 9, wherein the prime mover is connected to the main input shaft within the bell housing.
11. A pump apparatus as set forth in claim 8, wherein the prime mover output is a flywheel and the main input shaft is coupled to the flywheel.
12. A pump apparatus as set forth in claim 7, further comprising a pair of trunnion arms extending from opposite ends of the pump apparatus, where each trunnion arm is engaged to a swash plate located within the pump apparatus.
13. A pump apparatus as set forth in claim 7, further comprising a power take off unit with an output shaft and a clutch for engaging the output shaft to the main input shaft.
14. A pump apparatus as set forth in claim 13, wherein the output shaft and the main input shaft are coaxial.
15. A pump apparatus as set forth in claim 13, further comprising a fan mounted on the output shaft.
16. A pump apparatus as set forth in claim 7, wherein the first pump shaft and the second pump shaft are generally parallel to the main input shaft.
17. A pump apparatus attached to a prime mover, comprising:
a hydraulic mounting member having a first side and a second side opposite the first side;
a main input shaft having a first end connected to a prime mover output and a second end;
a first pump shaft driving a first pump;
a second pump shaft driving a second pump, the first pump shaft and the second pump shaft being drivingly coupled to and symmetrically located on opposite sides of the main input shaft;
the first and second pumps being rotatable disposed on the first side of the hydraulic mounting member;
an auxiliary pump shaft driving an auxiliary pump, the auxiliary pump shaft being drivingly coupled to the main input shaft and the auxiliary pump being in fluid communication with the first and second pumps; and
a power take off unit having a power take off shaft that is coaxial with the main input shaft, the power take off unit located on the second side of the hydraulic mounting member.
18. A pump apparatus as set forth in claim 17, further comprising a first trunnion arm to control the displacement of the first pump and a second trunnion arm to control the displacement of the second pump, wherein the first trunnion arm and the second trunnion arm each extend from opposite sides of the pump apparatus.
19. A pump apparatus as set forth in claim 18, wherein the hydraulic mounting member comprises a common end cap.
20. A pump apparatus as set forth in claim 19, wherein the auxiliary pump is supported on the first side of the common end cap.
21. A pump apparatus unit as set forth in claim 17, further comprising a separate housing member disposed between the hydraulic mounting member and the power take off unit, wherein the power take off unit is mounted to the separate housing member.
22. A pump apparatus unit as set forth in claim 21, further comprising a set of gears disposed within the separate housing member and powered by the second end of the input shaft and providing motive force to the first and second pumps and the auxiliary pump.
23. A hydraulic pump unit for mounting on a frame of a vehicle having a prime mover, the pump unit comprising:
a pump housing having a first end, a second end and a plurality of sides, and a pump chamber formed therein;
an end cap mounted on the second end of the pump housing;
a gear chamber cover attached to the end cap and forming a gear chamber therein;
first and second hydraulic pumps rotatably mounted in the pump chamber and driven by respective pump shafts;
an auxiliary pump mounted on the end cap and driven by an auxiliary shaft;
a gear set mounted in the gear chamber and drivingly engaged to each of the pump shafts and the auxiliary shaft;
a main drive shaft drivingly engaged to the gear set, whereby the pump shafts and auxiliary shaft are driven by the main drive shaft, the main drive shaft having a first end extending from the first end of the pump housing and being directly coupled to the prime mover, and a second end extending from the gear chamber cover; and
a power take off unit mounted to the gear chamber cover and including an output shaft, the power take off unit being drivingly coupled to the main drive shaft and the output shaft being coaxial with the main drive shaft.
24. A hydraulic pump unit as set forth in claim 23, wherein one of the pumps provides control pressure for the power take off unit.
25. A hydraulic pump unit as set forth in claim 23, wherein the auxiliary pump provides control pressure for the power take off unit.
26. A hydraulic pump unit as set forth in claim 23, further comprising a clutch for engaging and disengaging the output shaft of the power take off unit to the main drive shaft.
27. A hydraulic pump unit as set forth in claim 23, further comprising a fan mounted on an end of the output shaft.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A vibration wave driving apparatus comprising:
a vibrator including a vibration body having a frictional surface and an electrical-mechanical energy conversion element;
a driven body which has a frictional surface having contact with the frictional surface of the vibrator and which is configured to be pressed through the respective frictional surfaces; and
a supporting member having elastically-deformable portions for supporting the vibrator,
wherein the driven body is relatively moved by elliptical motion of the vibrator through the respective frictional surfaces,
wherein the supporting member is configured such that, when receiving a force in a first direction which is a direction orthogonal to a direction in which the vibrator relatively moves the driven body and a pressed direction in which the driven body is pressed, the supporting member is capable of displacing the frictional surface of the vibrator parallel to the frictional surface of the driven body by rotational deformation of the elastically-deformable portions,
wherein the supporting member is at least partially made from a plate-like metal material, and the supporting member has a substantially symmetrical shape with respect to a plane having a normal line in the direction of the relative displacement and a plane having a normal line in the first direction,
wherein the supporting member includes two fixed portions disposed at both sides thereof in the direction of the relative displacement, two holding portions disposed at both side thereof in the first direction, and four extending elastically-deformable portions extending in the direction of the relative displacement to connect the fixed portions and the holding portions, and
wherein the elastically-deformable portions are at least partially subjected to bending processing so as to have an angle to a plane having a normal line in the pressed direction.
2. The vibration wave driving apparatus according to claim 1, wherein the supporting member has a rotation center of its rotational deformation located in a vicinity of the respective frictional surfaces.
3. The vibration wave driving apparatus according to claim 1, wherein the supporting member has a rotation center of its rotational deformation located closer to a side of the driven body than to the respective frictional surfaces.
4. The vibration wave driving apparatus according to claim 2, wherein
the elastically-deformable portions are each formed so that a direction in which its stiffness is large corresponds to a direction inclined to the first direction on a plane having a normal line in a direction of the relative displacement, and the elastically-deformable portions are provided at positions to be symmetrical with respect to a plane having a normal line in the first direction, and
an intersection of extended directions in which the elastically-deformable portions provided at the positions to be symmetrical have large stiffness is the rotation center of the rotational deformation of the supporting member.
5. The vibration wave driving apparatus according to claim 3, wherein
the elastically-deformable portions are each formed so that a direction in which its stiffness is large corresponds to a direction inclined to the first direction on a plane having a normal line in a direction of the relative displacement, and the elastically-deformable portions are provided at positions to be symmetrical with respect to a plane having a normal line in the first direction, and
an intersection of extended directions in which the elastically-deformable portions provided at the positions to be symmetrical have large stiffness is the rotation center of the rotational deformation of the supporting member.
6. A vibration wave driving apparatus moving a driven body, comprising:
a vibrator including a vibration body and an electrical-mechanical energy conversion element, the vibration body having a frictional surface having contact with a frictional surface of the driven body and being configured to be pressed to the frictional surface of the driven body; and
a supporting member for supporting the vibrator,
wherein the supporting member comprises two pairs of elastically-deformable portions, and
wherein each pair of elastically-deformable portions is configured to be inclined at a substantially same angle to a plane having a normal line in a direction along which the frictional surface of the vibration body is pressed.