Crane

Patent metadata

Field	Value
Publication number	US-9580282-B2
Application number	US-201314648364-A
Country	US
Kind code	B2
Filing date	Dec 2, 2013
Priority date	Dec 3, 2012
Publication date	Feb 28, 2017
Grant date	Feb 28, 2017

Abstract

The invention relates to a crane comprising
a base for attaching the crane to a harvester or similar work machine, a main boom having two ends, one end pivoted to the base, an articulated boom having two ends, one end pivoted to the said main boom , an actuator cylinder for moving the main boom relative to the base having a cylinder part, a second actuator cylinder for moving the articulated boom relative to the main boom, a pressure cylinder in connection with one actuator cylinder, arranged to follow this actuator cylinder in order to produce pressure for the second actuator cylinder,

wherein the pressure cylinder is arranged to form an essentially coaxial multi-chamber cylinder with the actuator cylinder to be followed.

First claim

The invention claimed is:

1. Crane, comprising
a base for attaching the crane,
a main boom pivoted to the base,
an articulated boom pivoted to the main boom,
a first actuator cylinder comprising a first cylinder chamber and a second cylinder chamber,
a second actuator cylinder comprising a cylinder part, a piston rod, a third cylinder chamber, and a fourth cylinder chamber, the second actuator cylinder integrated coaxially with a pressure cylinder to form a coaxial multi-chamber cylinder, the pressure cylinder comprising a fifth cylinder chamber coaxially arranged with the two cylinder chambers of the second actuator cylinder, the piston rod being common for both the second actuator cylinder and the pressure cylinder and the pressure cylinder being arranged to follow the second actuator cylinder and to produce hydraulic pressure for the first actuator cylinder,
a first pressure line connected to the third cylinder chamber of the second actuator cylinder,
a second pressure line connected between the fifth cylinder chamber of the pressure cylinder and the first cylinder chamber of first actuator cylinder, and
a return line connected to the second cylinder chamber of first actuator cylinder,
where one of the first actuator cylinder and the second actuator cylinder is arranged to move the main boom relative to the base and the other is arranged to move the articulated boom relative to the main boom.

2. Crane according to claim 1 , wherein in the multi-chamber cylinder the second actuator cylinder and the pressure cylinder are at least partly on top of, or inside each other, in the radial direction of the multi-chamber cylinder.

3. Crane according to claim 1 , wherein the multi-chamber cylinder comprising a cylinder part and a hollow piston rod, which hollow piston rod is hollow until exterior of the cylinder part of the multi-chamber cylinder.

4. Crane according to claim 1 , wherein the multi-chamber cylinder comprising four cylinder chambers, of which
the third cylinder chamber of the side of the bottom belonging to the multi-chamber cylinder and the fourth cylinder chamber inside the piston rod on the side of the piston rod belonging to the multi-chamber cylinder are arranged to form the second actuator cylinder and
the fifth cylinder chamber external to the piston rod on the side of the piston rod of the multi-chamber cylinder and the sixth cylinder chamber external to the cylinder part inside the piston rod are arranged to form the pressure cylinder.

5. Crane according to claim 1 , wherein the multi-chamber cylinder has smaller degree of movement than the first actuator cylinder not belonging to the multi-chamber cylinder.

6. Crane according to claim 1 , wherein the actuator cylinder and pressure cylinder in the multi-chamber cylinder are essentially coaxially sequential.

7. Crane according to claim 6 , wherein the multi-chamber cylinder comprising a cylinder component, a partition for dividing the cylinder component into two parts, and a piston rod penetrating the partition.

8. Crane according to claim 6 , wherein in the multi-chamber cylinder the actuator cylinder is on the side of the piston rod.

9. Crane according to claim 1 , wherein the actuator cylinder operating the main boom is pivoted between the base and the main boom.

10. Crane according to claim 1 , wherein the crane comprising two pressure cylinders and both actuator cylinders are multi-chamber cylinders.

11. Crane according to claim 10 , wherein the crane comprising a hydraulic accumulator arranged in connection with the multi-chamber cylinder operating the main boom, for producing additional pressure for the multi-chamber cylinder.

12. Crane according to claim 1 , wherein the pressure cylinder is functionally between the actuator cylinders.

13. Crane, comprising
a base for attaching the crane,
a main boom pivoted to the base,
an articulated boom pivoted to the main boom,
a first actuator cylinder comprising a first cylinder chamber and a second cylinder chamber,
a second actuator comprising a cylinder part, a piston rod, a third cylinder chamber, and a fourth cylinder chamber, the second actuator cylinder integrated sequentially with a pressure cylinder to form a coaxial multi-chamber cylinder, the pressure cylinder comprising a fifth cylinder chamber sequentially arranged with the third and fourth cylinder chambers of the second actuator cylinder, the piston rod being common for both the second actuator cylinder and the pressure cylinder and the pressure cylinder being arranged to follow the second actuator cylinder and produce hydraulic pressure for the first actuator cylinder,
a first pressure line connected to the third cylinder chamber of the second actuator cylinder,
a second pressure line connected between the fifth cylinder chamber of the pressure cylinder and the first cylinder chamber of the first actuator cylinder, and
a return line connected to the second cylinder chamber of the first actuator cylinder,
where one of the first actuator cylinder and the second actuator cylinder is arranged to move the main boom relative to the base and the other is arranged to move the articulated boom relative to the main boom.

14. Crane according to claim 13 , wherein the multi-chamber cylinder comprising a cylinder component, a partition for dividing the cylinder component into two parts, and a piston rod penetrating the partition.

15. Crane according to claim 14 , wherein in the multi-chamber cylinder the actuator cylinder is on the side of the piston rod.

16. Crane according to claim 15 , wherein the first actuator cylinder operating the main boom is pivoted between the base and the main boom.

17. Crane according to claim 13 , wherein the crane comprising two pressure cylinders and both said actuator cylinders are multi-chamber cylinders.

18. Crane according to claim 17 , wherein the crane comprising a hydraulic accumulator arranged in connection with the multi-chamber cylinder operating the main boom, for producing additional pressure for the multi-chamber cylinder.

19. Crane according to claim 13 , wherein the pressure cylinder is functionally between the actuator cylinders.

20. Crane according to claim 1 , where the pressure cylinder comprises a sixth cylinder chamber connected to the return line.

21. Crane according to claim 13 , where the pressure cylinder comprises a sixth cylinder chamber connected to the return line.

Assignees

• Ponsse Oyj

Inventors

• Leinonen Yrjö
• Halonen Marko
• Auvinen Toni

Classifications

• E02F9/2225

  using pressure-compensating valves · CPC title

• B66C23/42 Primary

  with jibs of adjustable configuration, e.g. foldable · CPC title

• F15B15/1404

  in clusters, e.g. multiple cylinders in one block · CPC title

• F15B11/036

  by means of servomotors having a plurality of working chambers · CPC title

• E02F9/22

  Hydraulic or pneumatic drives {(for dipper or bucket arm position control E02F3/43, for blade position control for graders E02F3/844; for turntables E02F9/121; for fork-lift trucks B66F9/22)} · CPC title