公开(公告)号：EP0770180A1

公开(公告)日：1997-05-02

申请号：EP95924868.0

申请日：1995-06-28

Applicant: Danfoss A/S

Inventor： JEPSEN, Hardy, Peter ,  KRISTENSEN, Egon ,  MARTENSEN, Lars

IPC: F04B1

CPC classification number: F04B1/126 ,  F04B1/124 ,  F05C2225/04 ,  F05C2253/12

Abstract: A piston/slide shoe arrangement (1) of a hydraulic piston machine is disclosed, having a slide shoe (6), which is in articulated connection with a piston (4), with a friction-reducing plastics material (11) therebetween, wherein the plastics material, forming a channel (13), extends into a through-opening (12) in the slide shoe in a direction towards a sliding contact surface (7) of the slide shoe, which surface in operation lies against a swash plate (8). In such an arrangement, it is desirable when operating under adverse conditions to prevent the plastics material working its way out from the space between the piston and the slide shoe. For that purpose, the slide shoe (6) and the plastics material (11) are provided outside the through-opening (12) with at least one connecting element (16, 18) which takes up shear forces between slide shoe (6) and plastics material (11).

公开(公告)号：EP0746682A1

公开(公告)日：1996-12-11

申请号：EP95910453.0

申请日：1995-02-17

Applicant: Danfoss A/S

Inventor： HANSEN, Ove Thorbol ,  MARTENSEN, Lars

IPC: F04B1

CPC classification number: F04B1/2014 ,  F04B1/126 ,  Y10T74/18336

Abstract: A hydraulic axial piston machine is described, having axially movable pistons, which at one end bear by means of slider shoes against a slanting plate, and having a pressure plate (10) for holding the slider shoes in contact with the slanting plate. Under certain operating conditions the slider shoes have a tendency to tilt and lift away from the slanting plate at one side. To prevent this, the pressure plate (10) acts only on a part lying, in the radial direction of the slanting plate (7), outside a predetermined region (28).

公开(公告)号：EP0770181B1

公开(公告)日：2001-03-28

申请号：EP95924869.1

申请日：1995-06-30

Applicant: Danfoss A/S

Inventor： MARTENSEN, Lars ,  HANSEN, Ove, Thorbol ,  MOLLER, Henry, Madsen ,  JEPSEN, Hardy, Peter

IPC: F04B1/20

CPC classification number: F04B1/124 ,  F05C2203/0882 ,  F05C2253/12

Abstract: A hydraulic pumping device for use in a hydraulic machine having a piston and slider shoe unit made of a combination of plastic and metal material to operate with virtually lubricant free fluid.

公开(公告)号：EP0770182A1

公开(公告)日：1997-05-02

申请号：EP95925739.0

申请日：1995-06-28

Applicant: Danfoss A/S

Inventor： MARTENSEN, Lars ,  HANSEN, Ove, Thorbol

IPC: F04B1

CPC classification number: F04B1/2042 ,  F05C2225/04 ,  F05C2253/12 ,  Y10T74/18336

Abstract: A control plate (1) of a hydraulic machine having a core (2) is disclosed, which at least on its upper side (O) lying in operation against a cylinder drum is covered with a layer of a friction-reducing plastics material (3) and which has at least two control openings. In a control plate of that kind, it is desirable to simplify manufacture, during which subsequent machining is effected after the plastics material has been moulded on. For that purpose, the plastics material (3) is joined to the core (2) by means of at least one connecting element (8) which, as a result of interlocking engagement with the plastics material (3) and/or the core (2), takes up tensile forces substantially at right angles to the upper side (O).

公开(公告)号：EP0679225B1

公开(公告)日：1997-03-05

申请号：EP94904147.9

申请日：1994-01-03

Applicant: Danfoss A/S

Inventor： MARTENSEN, Lars ,  HANSEN, Ove Thorbol

IPC: F04B1/20

CPC classification number: F04B1/2021 ,  F05C2253/12 ,  Y10T74/18336

Abstract: A hydraulic piston machine is proposed, with a cylinder body (1), which comprises at least one cylinder (2) with a piston (3) movable therein, and a control counter-plate (7) which engages the cylinder body (1) by way of a contact surface (6) and, on relative movement between the cylinder body and the control counter-plate parallel to the contact surface, connects the cylinder in dependence upon its position with inlet and outlet channels (11, 12) respectively, the control counter-plate (7) and/or the cylinder body (1) being provided, at least in the region of the contact surface (6, 9), with a friction-reducing layer (13). A machine of that kind should be inexpensive to manufacture yet should operate reliably even when the hydraulic fluid has no or only slight lubricating properties. For that purpose the friction-reducing layer (13) is in the form of an injection-moulded part.