公开(公告)号：WO1996002755A1

公开(公告)日：1996-02-01

申请号：PCT/DK1995000276

申请日：1995-06-30

Applicant: DANFOSS A/S

Inventor： DANFOSS A/S ,  MARTENSEN, Lars ,  HANSEN, Ove, Thorbol ,  MOLLER, Henry, Madsen ,  JEPSEN, Hardy, Peter

IPC: F04B01/20

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.

Abstract translation: 一种用于液压机械的液压泵送装置，其具有由塑料和金属材料的组合制成的活塞和滑靴单元，以实际上无润滑剂的流体操作。

公开(公告)号：EP0679226B1

公开(公告)日：1997-09-10

申请号：EP94904991.0

申请日：1994-01-05

Applicant: Danfoss A/S

Inventor： MARTENSEN, Lars ,  JEPSEN, Hardy, Peter

IPC: F04B1/20

CPC classification number: F04B1/2021 ,  Y10T74/18336

Abstract: A hydraulic axial piston machine is disclosed, with a cylinder drum (2), which has at least one cylinder (3), in which a piston (6) is mounted so as to be axially displaceable, and with a control counter-plate (11) which, on rotation of the cylinder drum (2) and the control counter-plate (11) relative to one another, connects the cylinder (3) in dependence upon its position with a fluid inlet (14) and a fluid outlet (15). With a machine of that kind, it is desirable to improve balancing out of the forces necessary for effecting a seal between the cylinder drum (3) and the control counter-plate (11). For that purpose, between the cylinder drum (2) and the control counter-plate (11) there is arranged a pressure plate (17) which engages the cylinder drum (2) via the intermediary of a spring element (21), the pressure plate (17) having a through-opening (20) associated with the cylinder (3), which through-opening is connected to the cylinder (3) in a fluid-tight manner.

公开(公告)号：EP0770181A1

公开(公告)日：1997-05-02

申请号：EP95924869.0

申请日：1995-06-30

Applicant: Danfoss A/S

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

IPC: F04B1

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：EP0679226A1

公开(公告)日：1995-11-02

申请号：EP94904991.0

申请日：1994-01-05

Applicant: Danfoss A/S

Inventor： MARTENSEN, Lars ,  JEPSEN, Hardy, Peter

IPC: F03C1 ,  F04B1

CPC classification number: F04B1/2021 ,  Y10T74/18336

Abstract: A hydraulic axial piston machine is disclosed, with a cylinder drum (2), which has at least one cylinder (3), in which a piston (6) is mounted so as to be axially displaceable, and with a control counter-plate (11) which, on rotation of the cylinder drum (2) and the control counter-plate (11) relative to one another, connects the cylinder (3) in dependence upon its position with a fluid inlet (14) and a fluid outlet (15). With a machine of that kind, it is desirable to improve balancing out of the forces necessary for effecting a seal between the cylinder drum (3) and the control counter-plate (11). For that purpose, between the cylinder drum (2) and the control counter-plate (11) there is arranged a pressure plate (17) which engages the cylinder drum (2) via the intermediary of a spring element (21), the pressure plate (17) having a through-opening (20) associated with the cylinder (3), which through-opening is connected to the cylinder (3) in a fluid-tight manner.

公开(公告)号：EP0679225A1

公开(公告)日：1995-11-02

申请号：EP94904147.0

申请日：1994-01-03

Applicant: Danfoss A/S

Inventor： MARTENSEN, Lars ,  HANSEN, Ove Thorbol

IPC: F03C1 ,  F04B1

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.

公开(公告)号：EP0746682B1

公开(公告)日：2001-04-11

申请号：EP95910453.0

申请日：1995-02-17

Applicant: Danfoss A/S

Inventor： HANSEN, Ove Thorbol ,  MARTENSEN, Lars

IPC: F04B1/20

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：EP0832356A1

公开(公告)日：1998-04-01

申请号：EP96918617.0

申请日：1996-06-06

Applicant: Danfoss A/S

Inventor： HANSEN, Ove, Thorböl ,  MARTENSEN, Lars

IPC: F04B53

CPC classification number: F04B53/168

Abstract: A hydraulic piston machine is disclosed, having arranged in a basic body (1) at least one cylinder (2) in which a bushing made of a plastics material is arranged. Securing the bushing in the basic body occasionally presents problems which render manufacture of the machine more difficult. The present invention is intended to simplify the manufacture of the piston machine. To that end, the external diameter of the bushing (3) and the internal diameter of the cylinder (2) are matched to one another to provide freedom from play and the plastics material has a substantially smaller modulus of elasticity than the basic body (1).

公开(公告)号：EP0832356B1

公开(公告)日：2002-10-23

申请号：EP96918617.0

申请日：1996-06-06

Applicant: Danfoss A/S

Inventor： HANSEN, Ove, Thorböl ,  MARTENSEN, Lars

IPC: F04B1/20

CPC classification number: F04B53/168

Abstract: A hydraulic piston machine is disclosed, having arranged in a basic body (1) at least one cylinder (2) in which a bushing made of a plastics material is arranged. Securing the bushing in the basic body occasionally presents problems which render manufacture of the machine more difficult. The present invention is intended to simplify the manufacture of the piston machine. To that end, the external diameter of the bushing (3) and the internal diameter of the cylinder (2) are matched to one another to provide freedom from play and the plastics material has a substantially smaller modulus of elasticity than the basic body (1).

公开(公告)号：EP0770182B1

公开(公告)日：2000-12-13

申请号：EP95925739.5

申请日：1995-06-28

Applicant: Danfoss A/S

Inventor： MARTENSEN, Lars ,  HANSEN, Ove, Thorbol

IPC: F04B1/20

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：EP0770180B1

公开(公告)日：2001-08-08

申请号：EP95924868.3

申请日：1995-06-28

Applicant: Danfoss A/S

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

IPC: F04B1/20

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).