HYDRAULIC PUMP
First Claim
1. A hydraulic pump having a swash plate that can be installed obliquely inclined relative to a rotational shaft and a plurality of pistons whose axial displacement is defined by the swash plate and that rotate around the rotational shaft, comprising:
- the rotational shaft receiving input of torque that is output from an electric motor;
a housing that rotatably supports the rotational shaft;
a cylinder block that is installed inside the housing, provided with a plurality of cylinder chambers extending parallel to the rotational shaft, and rotates with the rotational shaft;
the pistons being supported relative to the respective cylinder chambers in the cylinder block so as to be slidably displaceable along a direction parallel to the rotational shaft;
the swash plate coming into contact with ends of the pistons and being rotatable around the rotational shaft with the pistons, and being rotatable about a rotation centerline that is obliquely inclined relative to the rotational shaft;
a case that is installed inside the housing and pivotably supported relative to the housing; and
a bearing portion that holds the swash plate relative to the case so as to be rotatable about the rotation centerline,wherein the pistons reciprocate in the cylinder chambers with rotation of the rotational shaft, whereby the pressure of oil sucked into the cylinder chambers is raised and thereafter the oil is discharged.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotational shaft 22 receives input of torque that is output from an electric motor 19. A housing 23 rotatably supports the rotational shaft 22. A cylinder block 24 inside the housing 23 rotates with the rotational shaft 22. The pistons 25 are supported relative to the respective cylinder chambers 24a in the cylinder block 24 so as to be slidably displaceable. A swash plate 26 is provided so as to come into contact with ends of the pistons 25 and be rotatable around the rotational shaft 22 with the pistons 25, and be rotatable about a rotation centerline that is obliquely inclined relative to the rotational shaft 22. A case 27 inside the housing 23 is pivotably supported relative to the housing 23. A bearing portion 28 holds the swash plate 26 relative to the case 27 so as to be rotatable around the rotation centerline.
18 Citations
8 Claims
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1. A hydraulic pump having a swash plate that can be installed obliquely inclined relative to a rotational shaft and a plurality of pistons whose axial displacement is defined by the swash plate and that rotate around the rotational shaft, comprising:
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the rotational shaft receiving input of torque that is output from an electric motor; a housing that rotatably supports the rotational shaft; a cylinder block that is installed inside the housing, provided with a plurality of cylinder chambers extending parallel to the rotational shaft, and rotates with the rotational shaft; the pistons being supported relative to the respective cylinder chambers in the cylinder block so as to be slidably displaceable along a direction parallel to the rotational shaft; the swash plate coming into contact with ends of the pistons and being rotatable around the rotational shaft with the pistons, and being rotatable about a rotation centerline that is obliquely inclined relative to the rotational shaft; a case that is installed inside the housing and pivotably supported relative to the housing; and a bearing portion that holds the swash plate relative to the case so as to be rotatable about the rotation centerline, wherein the pistons reciprocate in the cylinder chambers with rotation of the rotational shaft, whereby the pressure of oil sucked into the cylinder chambers is raised and thereafter the oil is discharged. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification