FR2541661A1 - STABILIZATION ASSEMBLY FOR MOBILE MACHINE - Google Patents

Abstract

THE INVENTION RELATES TO A STABILIZATION ASSEMBLY 5 MOUNTED ON A MOBILE MACHINE, INCLUDING A STABILIZATION SUPPORT 21 MOUNTED ON THE FRAME 2 OF THE MACHINE, ADJUSTABLE IN POSITION AND ATTACHED TO AN ADJUSTING MOTOR DEVICE 3, 8, 16 CONNECTED HAS A SOURCE OF ENERGY. THE ADJUSTMENT DEVICE 3 INCLUDES AN ELECTRIC MOTOR PROVIDED NEARBY 7 THE STABILIZATION SUPPORT, THE ENERGY SOURCE BEING ELECTRIC AND CONNECTED TO THE ELECTRIC MOTOR. ONE APPLICATION IS THE REALIZATION OF A MOBILE CRANE.

Description

Stabilization set for mobile gear.

  A number of mobile machines are equipped with stabilizers, which are put into service at the time of performing a specific job, to avoid a tilting of the machine caused by the reactions related to this work is the case of cranes mobile and mobile excavators. According to the prior art, a stabilization assembly mounted on a mobile machine for public works or handling comprises a stabilization support mounted on the frame of the machine, adjustable in position relative to the frame between a firm support position on the ground and a position out of ground support, and coupled to do this to a connected setting engine device

  selectively to a primary source of energy.

  According to what is known, the adjustment device is hydraulic and is supplied with fluid under pressure by a pump located in the turret pivoting of the machine and driven

  by the main engine of this machine, usually of the "Die-

  The stabilizers, being, by destination, mounted on the lower part of the machine, their hydraulic adjustment device is connected to the pump by a rotary joint and

  ducts of great length, that is to say by a com-

plex, bulky and expensive.

  The invention intends to remedy these drawbacks by placing an electropump in the vicinity of each stabilization assembly, thus eliminating the need for a rotary joint and significantly reducing the length

  fluid supply and delivery conduits.

  For this purpose, in the stabilization assembly yes is proposed, the engine adjustment device comprises at least

  an electric motor disposed near said stabilizer support

  but the primary source of energy is a source of electrical energy selectively connected to the at least one electric motor. The following advantageous provisions are, moreover, preferably adopted:

  the set includes a telescopic beam sensi-

  horizontally to at least two elements - a first element, which is fixed on the frame and a last element, which supports the stabilizing support -, while the motor adjustment device is mounted on one of the elements other than said first element; the adjusting motor device is mounted on said last element; the stabilizing support being of the telescopic type, constituted by a sliding guide mounted on the latter element of the beam and by a leg slidably mounted relative to said guide, a hydraulic cylinder being disposed between the sliding guide and the leg, and 1 edi S po S it -if

  The control unit comprises an electro-pump unit, whose electric motor

  is connected selectively to the said source of electrical energy.

  and whose pump is selectively connected to said hydraulic cylinder

lic;

  according to a first embodiment, the telescopic beam

  substantially horizontal pin is provided with a telescoping hydraulic jack, while this telescoping cylinder is selectively connected to said pump; according to a second embodiment, two pulleys are

  rotatably mounted on two of said beams of the beam, but

  as a cable is supported on these two pulleys and is wound on a winding drum mechanically coupled,

  through a clutch, to the shaft of said electric motor

cudgel.

  The invention will be better understood, and features

  and their benefits will become apparent during

  the description of achievements given below as examples

ple.

  It is understood that the description and drawings

  are only indicative and not limiting.

  3 - reference will be made to the accompanying drawings, in which Figure 1 is a simplified section of a first embodiment of a stabilization assembly according to the invention;

  Figure 2 shows the circuit diagram

  command of the assembly of Figure 1; Figure 3 is a simplified section of a second embodiment of a stabilization assembly according to the invention; and,

  Figure 4 shows the circuit diagram

the whole of Figure 3.

  With reference to FIGS. 1 and 2, a machine 1 is partially

  This is a mobile crane with a chassis

  2 is provided with rolling members 4 and a set of stabilizers

  5 This consists of a horizontal telescopic beam

  two sections 6 and 7, the section 6 being fixed, generally

  by welding, to frame 2, while a hydraulic cylinder

  double-acting 8 is articulated by axes 9 to the two sections.

  This cylinder comprises two separate chambers 10 and 11, the feed

  fluidization under pressure of the chamber 10 corresponding to the outlet of the section 7 with respect to and outside the section 6,

  and, additionally, the feeding of the chamber 11 correspon-

  The guide 12 having a vertical axis 13 is attached to the outer end of the section 7 A bore 14 machined in a flange 15 which comprises

  this guide 13 at its lower part, allows the sliding guide-

  parallel to the axis 13, the cylinder 23 of a jack 16 whose piston rod is fixed (17) at its upper part to the guide

  12, by a flange 18 Two separate chambers 19 and 20 are-

  formed in the cylinder 15, their respective supply of pressurized fluid causing the cylinder 23 to come out or retract relative to the guide 12. A stabilizing support 21 is also mounted at the lower end of the cylinder 23 and, in the shown configuration, is firmly supported on the ground 22, from which it has raised (in combination with three -4 - other sets 5 which is provided with the frame 2) the organs of

bearing 4.

  Hydraulic cylinders 8 and 16 are connected to

  an electro-pump unit 3, which is fixed on the section 7 and

  extended into electrical energy and remotely controlled by means of flexible electrical cables 24 from a control panel

  , located in the cockpit of the machine 1, for example.

  The detail of this installation is represented in FIG. 2, in which it is observed that the electric pump unit 3 comprises: a pump 26, an electric motor 27 for driving the pump 26, two solenoid valves 28 and 29,

a fluid reservoir 30.

  The discharge pipe 31 of the pump 26 is connected with

  solved with the solenoid valve 28 Two ducts 32, 33 connect this solenoid valve 28 to the chambers 10 and 11, respectively, of the jack 8; a duct 34 connecting the two solenoid valves 28 and 29; and, a conduit 35 connecting the solenoid valve 28 to the tank 30 Two conduits'36, 37 connect, via the piston rod

  of the cylinder 16, the solenoid valve 29 to the chambers 19, 20, respectively

  of the cylinder 16; two conduits 38, 39 connecting this electrovalve

  No. 29 to conduit 35; and a duct 40 connecting the discharge duct 31 to the duct 35, a calibrated discharge valve 41 being disposed on this duct 40. The electric cables 24 connect the terminals 42 of two control contactors 43 and 44 to the electromagnets 45 of the solenoid valves 28 and 29, the contactor 43 controlling the solenoid valve 28, and the contactor 44 controlling the solenoid valve 29 These contactors are located on the desk

  25 and connected to a source of electrical energy 46.

  In addition, other cables 24 connect the motor 27 to the terminals

  42, with the interposition of control diodes 47 This electrical circuit

The tramp is actually classic.

  The embodiment of FIGS. 3 and 4 is distinguished from that of FIGS. 1 and 2 only by the control device - telescoping of section 7 with respect to section 6. The same elements are found except the cylinder 8 and its device.

  order, replaced by the set described below.

  Two return pulleys 48, 49 are rotatably mounted

  on supports 50, 51 secured, respectively, sections 6, 7 A cable 52 is supported on the pulleys 48, 49 and has two ends wound on a m 8 me winding drum 53 so that the length "rolled" "Of the one during a rotation of this drum corresponds substantially to the length" unwound "of the other end This drum 53 is connected to the drive shaft of the electric motor 27 via a clutch 54 controlled electrically (24) by being connected to

  control and power cables of said motor 27 through

  Note that the motor 27 must be reversing

  or at least allow the drum 53 to be rotated in both directions. Naturally, the switch 43 is replaced by a combined control contactor 43a of the motor 27 and the clutch 54. of the pump 26 is connected directly to the solenoid valve 29, which is itself connected to the reservoir 30 via a conduit 35a (similar to the conduit of the embodiment of FIGS. 1 and 2).

which is connected the conduit 40.

  Remain & define the three positions of each electro-

valve 28 and 29.

  The three positions of the solenoid valve 28 in the figure

2 correspond -

  the first position, the communication between conduits 31 and 329, and conduits 33 and 35; shutter

  duct 34; and at the exit of section 7 with respect to

section 6; -

  the second position, to the closures of the conduits 32, 33 and 35 i to the placing in communication of the -conduits 31 and 134; and at immobilization at section 7 with respect to section 6; and, the third position, at the ports 6 - sections 31 and 33, and sections 32 and 35; closing the section 34; and, at the return of the section 7 in the section The three positions of the solenoid valve 29 of FIG. 2 correspond to the first position, to the connections

  conduits 34 and 37, and conduits 36 and 38; and, at the obtura-

  duct 39; the second position, to the closures of the ducts 36, 37, 38; and, placing the conduits 34 and 39 in communication; and, the third position, to porting

  ducts 34 and 36, and ducts 37 and 38; and, at the obtura-

duct 39.

  The three positions of the solenoid valve 29 of FIG. 4 correspond to: the first position, the communication between the ducts 31 and 37, and the ducts 36 and 35a; closing the conduit 39; and, the lifting of the support 21 with respect to the ground the second position, to the closures of the ducts 36, 37, 35 a; communicating conduits 31 and 39; and at the immobilization of the support 21 with respect to the chassis 2; and, the third position, to the communication of conduits 31 and 36, and, conduits 37 and 35a; closing the conduit 39; and, at the lowering of the support 21 compared

to the chassis 2.

  The operations described are simple

  ple. Regarding the embodiment of Figures 1 and 2, the driver of the machine, when operating the switch 43, on the one hand, the solenoid valve 28 in its first or third position, depending on the chosen direction its action on the contactor, on the other hand, automatically controls, through one of the diodes 47, the commissioning of the electric motor 27, and therefore of the pump 26, which supplies either the chamber -7 -

  , for example, the chamber 11 of the cylinder 8

  10 of the chamber 10, and the output of the section 7 out of the section 6, which are made If, in addition, the driver acts on the contactor 44, he places the solenoid valve 29 in his first or in his third position, for example in its third position, which allows the pressurized fluid to reach the chamber 19 of the cylinder 16 and thus, to firmly press the support

  21 on the ground 22 Naturally, reverse maneuvers allow

attempt to retract support 21.

  The operation of the embodiment of FIGS. 3 and 4 is similar, and identical to the cylinder 16. It is also observed that the commissioning of the motor 27

  is carried out, either directly by the contactor 43a, or indi-

  directly by the contactor 44 for controlling the solenoid valve 29 In addition, the contactor 43 has the clutch 54 and allows it to transmit the drive movement of the motor

  27 in the drum 53, one way or the other Thus, are obtained

  naked, to choose, the exit and the return of the section 7 compared

at section 6.

  In both embodiments, the telescoping control group 3 of the section 7 with respect to the section 6 and the positioning (lifting or lowering) of the support 21 is arranged on the assembly 5, and even, fixed on section 7 The motive power, electrical in nature (46) was conveyed by cables 24, flexible, which allowed the suppression of expensive and bulky joints

  rotating fully hydraulic systems.

  The simplification obtained from the control circuits of the stabilizers not only contributes to reducing the costs

  cost, but also to reduce the risk of breakdowns -

  The invention is not limited to the achievements described above.

  on the contrary, all the variants which

  They should be brought without leaving their frame or their spirit. -8 -

Claims (5)

R E V E N D I C A T IO N S   1 stabilization assembly (5) mounted on a movable public works or handling equipment, such as a crane or hydraulic excavator, comprising a stabilizing support (21) mounted on the frame (2) of the machine, adjustable in position relative to this frame between a firm support position on the ground and a position off the ground, and hitched to do this   to a selectively connected control motor device (3, 8, 16)   (28, 29) to a primary power source (46), characterized in that the adjusting motor device (3) comprises at least one electric motor (27) arranged (7) close to said stabilizing support (21). ), but the primary source   <46) is a selectively connected source of electrical energy   (43, 44) to said at least one electric motor (27).   2 stabilization assembly according to claim 1, characterized in that, in a manner known per se, it comprises a substantially horizontal telescopic beam with at least two elements (6, 7) -a first element (6), which is fixed on the   frame (2) and a last element (7), which supports the support of stabi-   (21) -, and that the adjusting motor device (3) is mounted on one (7) of the elements other than said first element (6).   Stabilization unit according to Claim 2, characterized in that the adjusting motor device (3)   is mounted on said last element (7).   4 Stabilization set according to any one   claims 2 and 3, characterized in that   known in itself, the stabilization support (21) is of the telescopic type   spike (16) constituted by a sliding guide (12) mounted on said last element (7) of the beam and by a leg (23) slidably mounted relative to said guide, a hydraulic cylinder (16) being arranged between the guide of sliding (12) and the leg, and in that the adjusting device comprises an electric pump unit (26, 27), the electric motor (27) of which is connected selectively (43, 44) to said source of electrical energy (46) and whose pump (27) is selectively connected (44, 29) to said 9 9- hydraulic cylinder (16).   Stabilization unit according to Claim 4, characterized in that, in a manner known per se, the beam   substantially horizontal telescopic arm is equipped with a hydraulic cylinder   telescoping plate (8), and in that this telescoping cylinder   (8) is selectively connected (43, 28) to said pump (26).   6 Stabilization set according to any one   Claims 2 to 4, characterized in that two pulleys   (48, 49) are rotatably mounted on two of said beam members (6, 7), while a cable (52) is supported on said two pulleys and is wound on a hitching drum (53). mechanically, via a clutch   (54), to the shaft of said electric motor (27).