Handling machine with telescopic arm

Patent metadata

Field	Value
Publication number	US-12565408-B2
Application number	US-202118252330-A
Country	US
Kind code	B2
Filing date	Nov 16, 2021
Priority date	Nov 19, 2020
Publication date	Mar 3, 2026
Grant date	Mar 3, 2026

Abstract

A handling machine with a telescopic arm including a hydraulic actuator system carried by a second section of the arm mounted so as to slide inside a first section, and a hydraulic control circuit that includes a pipe system that extends at least partly inside the arm and is connected to the hydraulic actuator system in order to supply the hydraulic actuator system. The pipe system includes at least one flexible hydraulic pipe that extends inside the arm and has a first portion fixedly mounted to the first section; a second portion fixedly mounted to the second section; and a U-shaped third portion connecting the first portion and the second portion to one another. The concave side of the U-shaped third portion is oriented towards the end of the first section that is opposite the end of the first section.

First claim

The invention claimed is:

1 . A handling machine comprising:
a telescopic arm including a first section and a second section mounted to slide into the first section; a telescopic ram configured to displace the second section in relation to the first section; a hydraulic actuator system coupled to the second section of the telescopic arm; and a hydraulic control circuit including a hydraulic pipe system extending at least partially inside the telescopic arm and attached to the hydraulic actuator system to supply the hydraulic actuator system; wherein,
the telescopic ram includes
a ram body mounted fixedly in relation to the first section and
a ram rod mounted to slide between a retracted position in the ram body and an extended position,

the hydraulic pipe system includes at least one flexible hydraulic pipe that extends inside the telescopic arm and includes
a first portion fixed in relation to the first section,
a second portion fixed in relation to the second section, and
a U-shaped third portion connecting the first portion and the second portion to one another,

the concavity of the U-shaped third portion is oriented toward a distal end of the first section, the distal end is opposite a proximal end of the first section, the proximal end defining an opening, and the second section extending into the opening such that when the ram rod is actuated from the retracted position to the extended position, the U-shaped third portion moves along an external part of the ram rod of the telescopic ram extending out of the ram body of the telescopic ram.

2 . The handling machine of claim 1 , wherein a bend of the at least one flexible hydraulic pipe extends into a space defined by the external part of the ram rod of the telescopic ram extending out of the ram body of the telescopic ram.

3 . The handling machine of claim 1 , wherein the first portion of the at least one flexible hydraulic pipe is fixed to the ram body of the telescopic ram.

4 . The handling machine of claim 1 , wherein the second portion of the at least one flexible hydraulic pipe is fixed to an internal wall of the second section.

5 . The handling machine of claim 1 , wherein the at least one flexible hydraulic pipe includes at least one pair of flexible pipes.

6 . The handling machine of claim 1 , wherein the at least one flexible hydraulic pipe includes at least two pairs of flexible pipes, one of the pairs being disposed on one side of a longitudinal axis of the telescopic ram and the other pair being disposed on the other side of the longitudinal axis of the telescopic ram.

7 . The handling machine of claim 1 , wherein
the hydraulic actuator system includes a double-acting hydraulic actuator, the at least one flexible hydraulic pipe includes a pair of flexible hydraulic pipes, a first flexible hydraulic pipe of the pair is configured to supply a first chamber of the double-acting hydraulic actuator, and a second flexible hydraulic pipe of the pair is configured to supply a second chamber of the double-acting hydraulic actuator.

8 . The handling machine of claim 5 , wherein the pair of flexible hydraulic pipes is disposed on one side of a vertical median plane of the telescopic arm, the vertical median plane passing through a longitudinal axis of the telescopic arm when the machine rests on a horizontal ground.

9 . The handling machine of claim 1 , further including a tool holder articulably connected to the second section and configured to receive a tool, wherein
the hydraulic actuator system includes a hydraulic inclination ram coupled to
the second section via the ram body,
the tool holder via the ram rod, and
the at least one flexible hydraulic pipe, and
the hydraulic inclination ram is configured to pivot the tool holder relative to the second section.

10 . The handling machine of claim 9 , wherein
the hydraulic actuator system includes a hydraulic actuator configured to actuate an accessory associated with the hydraulic actuator, and the hydraulic actuator is coupled to the second section and connected to the at least one flexible hydraulic pipe.

11 . The handling machine of claim 1 , wherein
the at least one flexible hydraulic pipe is attached to the hydraulic actuator system via the second portion, the second portion is connected to a connection system fixed to the second section, and the at least one flexible hydraulic pipe is attached to the hydraulic actuator system via at least one flexible connection pipe connected to the connection system and to the hydraulic actuator system.

12 . The handling machine of claim 1 , further comprising a chassis having a rear end and a forward end, wherein the telescopic arm is articulably connected to the rear end of the chassis.

13 . The handling machine of claim 1 , wherein the U-shaped third portion is in contact with an internal wall of the second section to guide the U-shaped third portion during displacement of the U-shaped third portion.

14 . A handling machine comprising:
a telescopic arm including a first section slidably engaged with a second section; a hydraulic actuator disposed in the telescopic arm and configured to slidably move the first section relative to the second section, the hydraulic actuator including
a body mounted to the first section and
a rod mounted to the second section and slidably engaged with the body, the rod extending at least partially into the body; and
a flexible hydraulic pipe at least partially disposed in the telescopic arm and including
a first portion mounted to the first section,
a second portion mounted to the second section, and
a U-shaped third portion connecting the first portion to the second portion,
wherein, when the rod slides relative to the body, the U-shaped third portion moves along the rod.

15 . The handling machine of claim 14 , wherein the U-shaped third portion is between the rod and an internal surface of the second section.

16 . The handling machine of claim 14 , wherein when the rod slides relative to the body, the U-shaped third portion moves along an internal surface of the second section.

17 . The handling machine of claim 14 , wherein the flexible hydraulic pipe is connected to the hydraulic actuator.

Assignees

• Manitou Bf

Inventors

• Pousset Alexis

Classifications

• E02F9/2275

  Hoses and supports therefor and protection therefor · CPC title

• E02F9/2271

  Actuators and supports therefor and protection therefor · CPC title

• E02F9/2203

  Arrangements for controlling the attitude of actuators, e.g. speed, floating function · CPC title

• E02F3/422

  Drive systems for bucket-arms, front-end loaders, dumpers or the like · CPC title

• E02F3/38

  Cantilever beams {, i.e. booms;, e.g. manufacturing processes, forms, geometry or materials used for booms (for booms with cable suspension arrangements E02F9/14 takes precedence)}; Dipper-arms {, e.g. manufacturing processes, forms, geometry or materials used for dipper-arms}; Bucket-arms {(E02F3/34 takes precedence)} · CPC title