Constructional unit consisting of a hydraulic machine (hydraulic pump or hydraulic motor) and a support

• US 5,591,015 A
• Filed: 05/09/1995
• Issued: 01/07/1997
• Est. Priority Date: 05/10/1994
• Status: Expired due to Fees

• Current Assignee: Mannesmann Rexroth AG (Robert Bosch GmbH)
• Original Assignee: Mannesmann Rexroth GmbH (Robert Bosch GmbH)
• Inventors: Dantlgraber, Jorg
• Primary Examiner(s): Denion, Thomas E.
• Application Number:
  US08/437,549
• Time in Patent Office: 609 Days
• Field of Search: 92/146, 92/147, 92/161, 417/312, 417/363
• US Class Current: 417/312
• CPC Class Codes: F04B 53/16 Casings; Cylinders; Cylinder liners or heads; Fluid connections

Abstract

A constructional unit comprising a hydraulic machine having a drive or driven shaft and of a support by which the hydraulic machine is held with the interposition of material which deadens solid-conducted noise. Low noise emission of the hydraulic machine is obtained in the manner that the support extends over the hydraulic machine in particular in the direction towards the shaft and that the hydraulic machine is supported on the support via material which deadens solid-conducted noise, present between its outer wall surface and the support. In this way the noise emission can be reduced in a simple manner.

Claims

1. A constructional unit comprising

a hydraulic pump having a drive shaft,

solid conducted noise dampening material, and a drive motor by which the hydraulic pump is drivable via the drive shaft, and

a support via which the hydraulic pump is held on the drive motor, with interpositioning of the solid conducted noise dampening material which deadens solid-conducted noise,

wherein the support engages with an outside of the hydraulic pump in a direction of the shaft, and

the hydraulic pump is supported on the support via the solid conducted noise dampening material, the solid conducted noise dampening material being interposed between an outer wall surface of the pump and the support.

2. A constructional unit according to claim 1, wherein

a center of gravity of the hydraulic pump is located on an axis of the shaft,

in a region of a plane extending through the center of gravity and perpendicular to the shaft, the hydraulic pump is supported on the support via the solid-conducted-noise deadening material.

3. A constructional unit according to claim 1, wherein an inner side of the support radially faces the hydraulic pump, and is of rotational symmetry.

4. A constructional unit according to claim 1, wherein the support extends peripherally around the hydraulic pump.

5. A constructional unit according to claim 4, wherein the support has a cup shape including a bottom disposed in front of one end of the hydraulic pump.

6. A constructional unit according to claim 1, wherein the material of the support comprises a reaction resin concrete.

7. A constructional unit according to claim 4, wherein the solid-conducted noise deadening material extends peripherally around the hydraulic pump.

8. A constructional unit according to claim 7, wherein the hydraulic pump has an axial flange which is surrounded by the solid-conducted noise-deadening material.

9. A constructional unit according to claim 5, wherein the solid-conducted noise-deadening material is present between the hydraulic pump and the bottom of the cup-shaped support.

10. A constructional unit according to claim 7, wherein the support has at least one inner shoulder for an axial application of the solid-conducted noise-deadening material.

11. A constructional unit according to claim 10, wherein the support has two inner shoulders, and an inner groove which is axially limited by the two inner shoulders, the support being filled with solid-conducted noise-deadening material.

12. A constructional unit according to claim 10, wherein the support has at least two support parts, of said at least one inner shoulder is displaceable by changing the position of one of said support parts with respect to the position of the other support part.

13. A constructional unit according to claim 4, wherein the solid-conducted noise-deadening material is an injectable material for injection into a space between the hydraulic pump and the support.

14. Construction unit according to claim 2, wherein an inner side of the support, which side radially faces the hydraulic pump, is rotationally-asymmetrical.

15. Construction unit according to claim 11, wherein the support comprises at least two support parts, and one of said inner shoulders is displaceable by a changing of a position of one of said support parts with respect to the other of said support parts.