EP1373646A1 - Engin de travaux publics polyvalent du type chargeuse-pelleteuse - Google Patents
Engin de travaux publics polyvalent du type chargeuse-pelleteuseInfo
- Publication number
- EP1373646A1 EP1373646A1 EP02722353A EP02722353A EP1373646A1 EP 1373646 A1 EP1373646 A1 EP 1373646A1 EP 02722353 A EP02722353 A EP 02722353A EP 02722353 A EP02722353 A EP 02722353A EP 1373646 A1 EP1373646 A1 EP 1373646A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- assembly
- distributors
- loader
- chassis
- backhoe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
- E02F3/963—Arrangements on backhoes for alternate use of different tools
- E02F3/964—Arrangements on backhoes for alternate use of different tools of several tools mounted on one machine
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/08—Superstructures; Supports for superstructures
- E02F9/0858—Arrangement of component parts installed on superstructures not otherwise provided for, e.g. electric components, fenders, air-conditioning units
- E02F9/0875—Arrangement of valve arrangements on superstructures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/2004—Control mechanisms, e.g. control levers
Definitions
- the present invention relates to the field of public works machinery, and more particularly to earthmoving machinery which can work either as a loader or as a backhoe, machines which in the following description will be designated by the expression "loader / backhoe”.
- This chassis supports in its central part a driving and control station. At the front of the chassis is mounted a loader assembly and, at the rear, an excavator assembly.
- each working tool has its own control means making it possible to supply the hydraulic jacks actuating the constituent elements of each working tool.
- Each control cylinder can therefore be selectively controlled by means of a hydraulic distributor that can be actuated by a manipulator, a manipulator which can be either a mechanical control by lever and linkage, or a hydraulic control or an electric control.
- an additional command can act on the configuration of the bucket, a command generally called 4 in 1.
- Such a command is used when using a bucket consisting of two separate elements offset from each other.
- the machine can then perform different functions, namely:
- control distributors of the loader assembly are therefore grouped together on the chassis, and this substantially at the level of the driving members.
- the distributors supplying the control jacks are grouped on a separate module mounted at the rear of the chassis.
- the operator swivels his seat to, on the one hand, set up the lateral stabilizers, and on the other hand, actuate the actuating means of the jacks allowing the implementation of the shovel.
- such a backhoe assembly therefore requires the presence of at least six distributors, namely two for controlling the lateral stabilizers that the machine comprises, one for controlling the boom, one for controlling the arm. articulated on said boom, one for controlling the bucket articulated at the end of the arm, and the last for controlling the rotation of the boom.
- the first problem which the invention proposes to solve therefore relates to the production of a multipurpose machine comprising a hydraulic circuit for controlling the tools of the machine, of a simplified design, easy to install and of great reliability during its use. Furthermore, such a circuit also makes it possible to have priority direction control.
- the invention also aims to arrange the elementary distributors so that the commands enabling the excavator function to be fulfilled are central, while those enabling the loader function to be fulfilled are distributed on either side of the abovementioned elements.
- the invention therefore relates to a versatile public works machine of the loader / backhoe type comprising a movable frame in the central part of which is mounted a driving and control station, said supporting frame, at the front, a loader assembly and, at the rear, a backhoe or excavator assembly, which can be controlled independently of one another by means of a hydraulic circuit selectively supplying a plurality of actuatable distributors by a manipulator and which control the hydraulic cylinders of the constituent elements of each working tool, and it is characterized in that: all of the distributors supplying the tool control cylinders, are grouped together in the form of a single mounted module transversely on the chassis, and this between the rear axle and the frame supporting the backhoe assembly; the hydraulic fluid is supplied by means of a variable flow pump supplying a priority valve on the direction function, associated with the block grouping the distributors; the distribution of the fluid to each distributor is carried out with a compensation balance making it possible to adjust the flow rates per
- the distributors supplying the cylinders that the backhoe assembly comprises are manually controlled (but could also be hydraulically controlled) and the distributors of the cylinders of the loader assembly are, for their part, hydraulically controlled.
- the distributors of the loader assembly are arranged laterally with respect to those of the excavator assembly, thus making it possible to facilitate the hydraulic connection with said loader assembly which is located at the front of the machine.
- FIG. 1 is a general side view of a machine of the loader / backhoe type
- FIG. 2 is a schematic view from above, illustrating the manner in which the chassis of such a machine is produced as well as the mounting of the control distributors on this chassis;
- FIG. 3 is a detailed view of the embodiment of the block comprising the elementary control distributors and the manner in which they are mounted on the chassis of the machine;
- FIG. 4 is a simplified diagram of the hydraulic circuit supplying the distributors of a machine produced in accordance with the invention.
- the invention therefore relates to a public works machine of the loader / backhoe type.
- This machine therefore essentially comprises a chassis, designated by the general reference (1), supported by two axles (2,3), the front axle (2) being provided with steered and driving wheels (4) and the rear axle of the large diameter driving wheels (5).
- a heat engine which drives a gearbox with converter connected by transmission to the two front and rear axles as well as the hydraulic circuit making it possible to control the work equipment also mounted on said chassis.
- Said work equipment is, on the one hand, constituted by a loader type assembly designated by the general reference (6), mounted at the front of said chassis and, on the other hand, by a "backhoe” type assembly or “excavator”, designated by the general reference (7) mounted meanwhile at the rear of the chassis.
- the loader assembly (6) comprises two arms (8) articulated at (9) on the chassis and arranged on either side of the cover (10). These arms (8) can be moved under the action of two arm jacks (11) also located laterally on the frame at (12), and whose rod acts on the intermediate part (13) of the lateral arms. (8) .
- a bucket (9) associated with connecting rods (14,15) forming a deformable parallelogram.
- the inclination of the bucket (9) is obtained by means of a jack (16).
- the bucket (9) can possibly be constituted by an assembly comprising two distinct elements offset relative to each other, and making it possible to adopt several configurations enabling it to fulfill, in addition to the loader function, that of blade a bulldozer, or pliers, or an opening bucket.
- the backhoe assembly (7) is, for its part, mounted at the rear of the chassis on a rigid transverse frame (20) located back from the drive wheels (5).
- This backhoe assembly is conventional and essentially consists of a boom (23) associated with an arm (24) at the end of which is mounted a bucket (25).
- the arrow (23) receives a rotational movement about a vertical axis relative to the chassis.
- the boom (23) is articulated with respect to the chassis, the arm (24) being articulated with respect to the end of said boom (23) and the bucket (25) with respect to the end of the arm (24).
- the position of the elements is controlled relative to each other by means of jacks (26,27,28).
- two lateral stabilizers are also mounted on the chassis.
- the machine operator and control station is mounted on the central part of the chassis.
- This control station therefore comprises conventional driving means as well as the manipulators, preferably of the hydraulic type, making it possible to ensure the selection of the distributors controlling the various jacks of the loader assembly.
- This driving position is designed so that by simply swiveling the seat, the backhoe assembly can be used at the rear.
- the backhoe assembly is controlled by six distributors that can be actuated by individual manual controls.
- all of the distributors supplying the actuating cylinders of both the loader and the backhoe are grouped together in the form of a module (30) as shown in FIGS. 3 and 4.
- This block or module (30) is mounted on a transverse beam (31) integral with the two longitudinal members constituting the chassis, and this by means of damping assemblies making it possible to absorb the stresses undergone by said chassis during working operations.
- the distributor block (30) comprises six distributors (30a to 30f), with mechanical control intended to ensure the controls of the backhoe which are located at the rear of the craft.
- a seventh distributor (38g) is also planned from the outset in the event that the machine is likely to receive additional options.
- the distributors (32, 33, 34) intended to supply the cylinders of the loader assembly are arranged laterally with respect to those of the backhoe assembly, thus facilitating mechanical connection with the loader controls which are located at the front. of the craft.
- This circuit (35) is associated with a priority valve (37) on the steering function.
- each distributor is supplied with shared flow.
- an electro-distributor (38) for the shovel immobilization cylinders is also associated with the block (30) of distributors.
- the solution according to the invention has many advantages among which one can cite ease of assembly, maintenance, account given that all the functions are integrated in a single block.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Operation Control Of Excavators (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Shovels (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0104278 | 2001-03-29 | ||
FR0104278A FR2822859B1 (fr) | 2001-03-29 | 2001-03-29 | Engin de travaux publics polyvalent du type chargeuse- pelleteuse |
PCT/FR2002/000974 WO2002079581A1 (fr) | 2001-03-29 | 2002-03-20 | Engin de travaux publics polyvalent du type chargeuse-pelleteuse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1373646A1 true EP1373646A1 (fr) | 2004-01-02 |
EP1373646B1 EP1373646B1 (fr) | 2007-09-26 |
Family
ID=8861712
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02722353A Expired - Lifetime EP1373646B1 (fr) | 2001-03-29 | 2002-03-20 | Engin de travaux publics polyvalent du type chargeuse-pelleteuse |
Country Status (6)
Country | Link |
---|---|
US (1) | US20040060712A1 (fr) |
EP (1) | EP1373646B1 (fr) |
AT (1) | ATE374288T1 (fr) |
DE (1) | DE60222642D1 (fr) |
FR (1) | FR2822859B1 (fr) |
WO (1) | WO2002079581A1 (fr) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2005095258A1 (fr) * | 2004-03-30 | 2005-10-13 | Hitachi Construction Machinery Co., Ltd. | Machine de travail |
US7434653B2 (en) * | 2005-03-31 | 2008-10-14 | Caterpillar Inc. | On-demand electro-hydraulic steering system |
US20070131466A1 (en) * | 2005-12-12 | 2007-06-14 | Gutzwiller Timothy M | Work machine with electrical and hydraulic service centers |
US20070246288A1 (en) * | 2006-04-24 | 2007-10-25 | Mather Daniel T | Dual force hydraulic steering system for articulated work machine |
CN104564919A (zh) * | 2015-01-27 | 2015-04-29 | 第一拖拉机股份有限公司 | 一种轮式拖拉机液压系统 |
US10480156B2 (en) * | 2015-12-14 | 2019-11-19 | Kubota Corporation | Work vehicle |
JP6570440B2 (ja) * | 2015-12-14 | 2019-09-04 | 株式会社クボタ | 作業車 |
CN107059979A (zh) * | 2017-04-12 | 2017-08-18 | 管中林 | 一种具有多种功能的步履挖掘机 |
CN107059978A (zh) * | 2017-04-12 | 2017-08-18 | 管中林 | 一种具有稳定互联悬架的步履挖掘机 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2979081A (en) * | 1959-08-17 | 1961-04-11 | Deere & Co | Control mechanism |
US3302317A (en) * | 1963-09-26 | 1967-02-07 | Domres Franklin | Grader |
US3329225A (en) * | 1964-12-09 | 1967-07-04 | Thomas J Dunn | Vehicle with selectively changeable work implements |
FR1483942A (fr) * | 1966-04-28 | 1967-06-09 | Poclain Sa | Nouvel engin pour travaux de terrassement |
US3627155A (en) * | 1970-04-09 | 1971-12-14 | Deere & Co | Hydraulic fluid hose handling means for a side shiftable backhoe |
US3752337A (en) * | 1971-08-20 | 1973-08-14 | Reynolds Tobacco Co R | Device for handling bagged or bundled soft material |
US4051860A (en) * | 1975-12-15 | 1977-10-04 | Massey-Ferguson Inc. | Valve control mechanism |
US4479349A (en) * | 1981-11-19 | 1984-10-30 | General Signal Corporation | Hydraulic control system |
GB2183795B (en) * | 1985-12-03 | 1989-10-04 | Kubota Ltd | Valve control structure for working vehicle |
US5138756A (en) * | 1989-12-08 | 1992-08-18 | Ford New Holland, Inc. | Method of converting backhoe controls |
US5471908A (en) * | 1994-02-16 | 1995-12-05 | Case Corporation | Hydraulic system for backhoe |
US5553992A (en) * | 1994-10-24 | 1996-09-10 | New Holland North America, Inc. | Controls for a skid steer loader |
AU720849B2 (en) * | 1996-03-28 | 2000-06-15 | Clark Equipment Company | Multifunction valve stack |
US6018895A (en) * | 1996-03-28 | 2000-02-01 | Clark Equipment Company | Valve stack in a mini-excavator directing fluid under pressure from multiple pumps to actuable elements |
JP3070918B2 (ja) * | 1998-07-15 | 2000-07-31 | 株式会社小松製作所 | ブルドーザ |
US6640409B2 (en) * | 2001-09-25 | 2003-11-04 | Case Corporation | Method for retrofitting a swing damping valve circuit to a work vehicle |
US6843004B2 (en) * | 2003-01-15 | 2005-01-18 | Robert G. Loeb | Heavy equipment safety device |
-
2001
- 2001-03-29 FR FR0104278A patent/FR2822859B1/fr not_active Expired - Fee Related
-
2002
- 2002-03-20 AT AT02722353T patent/ATE374288T1/de not_active IP Right Cessation
- 2002-03-20 EP EP02722353A patent/EP1373646B1/fr not_active Expired - Lifetime
- 2002-03-20 WO PCT/FR2002/000974 patent/WO2002079581A1/fr active IP Right Grant
- 2002-03-20 DE DE60222642T patent/DE60222642D1/de not_active Expired - Lifetime
-
2003
- 2003-09-19 US US10/666,882 patent/US20040060712A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO02079581A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2002079581A1 (fr) | 2002-10-10 |
DE60222642D1 (de) | 2007-11-08 |
EP1373646B1 (fr) | 2007-09-26 |
US20040060712A1 (en) | 2004-04-01 |
ATE374288T1 (de) | 2007-10-15 |
FR2822859B1 (fr) | 2003-07-18 |
FR2822859A1 (fr) | 2002-10-04 |
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