Vibratory drive with hydraulic pulse generator

Patent metadata

Field	Value
Publication number	US-10443583-B2
Application number	US-201615360827-A
Country	US
Kind code	B2
Filing date	Nov 23, 2016
Priority date	Nov 23, 2015
Publication date	Oct 15, 2019
Grant date	Oct 15, 2019

Abstract

A vibratory drive includes a pulse generator and at least one actuator. The actuator includes a first fluid chamber and a second fluid chamber, the volumes of which are adjustable in phase opposition. The first fluid chamber has a fluid connection to a third fluid chamber in the pulse generator. The second fluid chamber has a fluid connection to a fourth fluid chamber in the pulse generator. The third and fourth fluid chambers each have portions that are defined by linearly moveable defining elements. The pulse generator includes a rotor that rotates relative to a first axis of rotation and that defines respective portions of the third fluid chamber and the fourth fluid chamber. The defining elements are linearly moveable in the rotor. The pulse generator includes a coupling element that is separate from the rotor. The defining elements are coupled in their movement to that of the coupling element.

First claim

What is claimed is:

1. A vibratory drive, comprising:
at least one actuator with a first fluid chamber and a second fluid chamber, the volumes of the first and second fluid chambers being adjustable in phase opposition; and
a pulse generator having at least one third fluid chamber and at least one fourth fluid chamber therein, the first fluid chamber having a fluid connection to the third fluid chamber and the second fluid chamber having a fluid connection to the fourth fluid chamber, the third fluid chamber and the fourth fluid chamber each in portions being defined by linearly moveable defining elements,
wherein the pulse generator includes a rotor that is configured to rotate relative to a first axis of rotation and that defines respective portions of the third fluid chamber and the fourth fluid chamber, the defining elements accommodated so as to be linearly moveable in the rotor,
wherein the pulse generator further includes a coupling element separate from the rotor, the defining elements coupled in their movement to that of the coupling element,
wherein a first rotary passage and a second rotary passage in the pulse generator are assigned to each actuator, each first rotary passage affording a fluid connection from the first fluid chamber concerned to the third fluid chamber concerned, each second rotary passage affording a fluid connection from the second fluid chamber concerned to the fourth fluid chamber concerned,
wherein the first rotary passage and the second rotary passage each include an annular groove that runs circularly around the first axis of rotation, an orifice opening that opens into the annular groove is arranged on another part of the rotary passage concerned, and
wherein all first rotary passages and all second rotary passages have a common sealing element, a first sealing face that bears and slides on a second sealing face on the rotor is arranged on the sealing element, and
wherein the annular grooves are arranged in the one first sealing face or the one second sealing face, the orifice openings arranged in the other, second or first sealing face.

2. The vibratory drive according to claim 1 , wherein the position of the coupling element is adjustable relative to the first axis of rotation.

3. The vibratory drive according to claim 1 , wherein the pulse generator is configured as an axial piston pump, the defining elements formed by pistons moving substantially parallel to the first axis of rotation.

4. The vibratory drive according to claim 3 , wherein the axial piston pump is of swash-plate type, the coupling element formed by a swash plate that is configured to pivot relative to a second axis of rotation, the second axis of rotation oriented perpendicular to the first axis of rotation.

5. The vibratory drive according to claim 1 , wherein the volumes of the third fluid chamber and the fourth fluid chamber, which are assigned to the same actuator, are adjustable in phase opposition by the rotation of the rotor.

6. The vibratory drive according to claim 1 , wherein the sealing ring is an integral part of all first rotary passages and all second rotary passages.

7. The vibratory drive according to claim 1 , wherein the third fluid chamber and the fourth fluid chamber each have a fluid connection to an assigned first fluid duct portion that runs in the rotor and that leads to the assigned rotary passage.

8. The vibratory drive according to claim 1 , wherein the at least one actuator is two actuators, to each of which a separate first rotary passage and a separate second rotary passage are assigned, all rotary passages each having an annular groove, all annular grooves arranged concentrically with one another, two immediately adjacent annular grooves being assigned to each actuator.

9. The vibratory drive according to claim 1 , wherein the number of third fluid chambers and fourth fluid chambers is in each case a whole-number multiple, greater than one, of the number of actuators, adjacent third fluid chambers in a circumferential direction relative to the first axis of rotation being assigned to the same actuator, adjacent fourth fluid chambers in a circumferential direction relative to the first axis of rotation being assigned to the same actuator.

10. A vibratory drive, comprising:
at least one actuator with a first fluid chamber and a second fluid chamber, the volumes of the first and second fluid chambers being adjustable in phase opposition; and
a pulse generator having at least one third fluid chamber and at least one fourth fluid chamber therein, the first fluid chamber having a fluid connection to the third fluid chamber and the second fluid chamber having a fluid connection to the fourth fluid chamber, the third fluid chamber and the fourth fluid chamber each in portions being defined by linearly moveable defining elements,
wherein the pulse generator includes a rotor that is configured to rotate relative to a first axis of rotation and that defines respective portions of the third fluid chamber and the fourth fluid chamber, the defining elements accommodated so as to be linearly moveable in the rotor,
wherein the pulse generator further includes a coupling element separate from the rotor, the defining elements coupled in their movement to that of the coupling element, and
wherein the at least one actuator is two actuators, to each of which a separate first rotary passage and a separate second rotary passage are assigned, all rotary passages each having an annular groove, all annular grooves arranged concentrically with one another, two immediately adjacent annular grooves being assigned to each actuator.

Assignees

• Bosch Gmbh Robert

Inventors

• Rath Andreas
• Nafz Timo

Classifications

• F04B1/20

  having rotary cylinder block · CPC title

• F04C2/344

  with vanes reciprocating with respect to the inner member · CPC title

• F04C15/06

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title

• F04B1/146

  Swash plates; Actuating elements · CPC title

• B06B1/18 Primary

  wherein the vibrator is actuated by pressure fluid (B06B1/20 takes precedence) · CPC title