WO1998009864A1 - Dispositif basculant pour vehicule a cabine basculante - Google Patents

Dispositif basculant pour vehicule a cabine basculante Download PDF

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Publication number
WO1998009864A1
WO1998009864A1 PCT/NL1997/000501 NL9700501W WO9809864A1 WO 1998009864 A1 WO1998009864 A1 WO 1998009864A1 NL 9700501 W NL9700501 W NL 9700501W WO 9809864 A1 WO9809864 A1 WO 9809864A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
piston rod
tilting device
cab
tube
Prior art date
Application number
PCT/NL1997/000501
Other languages
English (en)
Inventor
Lambertus Johannes Sonneborn
Original Assignee
Applied Power Incorporated
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Applied Power Incorporated filed Critical Applied Power Incorporated
Priority to EP97940460A priority Critical patent/EP0923483A1/fr
Publication of WO1998009864A1 publication Critical patent/WO1998009864A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1466—Hollow piston sliding over a stationary rod inside the cylinder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D33/00—Superstructures for load-carrying vehicles
    • B62D33/06—Drivers' cabs
    • B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
    • B62D33/067—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other tiltable

Definitions

  • the present invention relates to a tilting device for a vehicle with a tiltable cab, a chassis, and hinge means, which connect the cab to the chassis, the cab being tiltable through an angle with respect to the chassis about a hinge axis defined by the hinge means between a driving position and a tilted-forward position,
  • tilting device comprises a double-acting hydraulic cylinder, which has a cylinder body, which delimits a cylinder chamber closed off by a cylinder base and cylinder head at opposite ends thereof, a piston, which in the cylinder chamber forms two mutually separate working chambers and a piston rod, which is fastened to the piston and projects outwards through a bore in the cylinder head.
  • a tilting device of this kind is known, for example, from US 4,493,386.
  • the cylinder base of the double-acting cylinder is provided with two connections for hydraulic lines.
  • the one connection is in communication, via a duct in the cylinder base, with the cylinder-base-side working chamber, the other working chamber is in communication, via a pipe running outside the body of the cylinder, with the other connection arranged on the cylinder base. If hydraulic fluid is supplied to the cylinder-head-side working chamber, this leads to the piston rod sliding in, for which reason the pipe on the outside of the cylinder is referred to by those skilled in the art as a "pull-pipe".
  • a drawback of this known device is that the external "pull-pipe” is susceptible to damage, for example as a result of vibrations. If the "pull-pipe” starts to leak, this results in the cab tilting forwards in an unrestrained and uncontrollable manner when the cab passes its dead centre during tilting forwards, i.e. when the centre of gravity of the cab comes to lie in front of the hinge axis.
  • a further drawback is that the gap between the external "pull-pipe" and the body of the cylinder causes problems in terms of corrosion.
  • a tilting device in accordance with the preamble of claim 1 is also known from FR 24 87 319.
  • the "pull-pipe" running on the outside of the cylinder body is absent.
  • the piston rod is provided in the region of its head with two connections for hydraulic lines and two separate ducts are formed in the piston rod. This is done by providing the piston rod with an axial bore and placing a tube of relatively small diameter therein. One connection is in communication with the duct in the tube and, via the tube, with the cylinder-base-side working chamber of the cylinder, and the other connection is in communication with the annular duct between the piston rod and the tube and, via the said duct, with the cylinder-head-side working chambe .
  • the tilting device which is known from FR 24 87 319 provides a solution to the problem of damage to the external "pull-pipe", as is known from US 4,493,386, there are also a number of drawbacks associated with this tilting device.
  • the tilting device in accordance with FR 24 87 319 it is in practice necessary for the cylinder to be fastened to the chassis by the piston rod and to the cab by the cylinder base, in order to avoid undesirably long hydraulic lines to the pump unit.
  • a further drawback is that the tilting cylinder which is known from FR 24 87 319 is difficult to realize in production engineering terms and can only be realized at an undesirably high cost price.
  • the object of the present invention is to provide an improved tilting device which is easy to manufacture.
  • the present invention also relates to a vehicle provided with such a tilting device.
  • Figure 1 shows a side view of the front part of a vehicle with a tiltable driver's cab
  • Figure 2 shows a longitudinal section through the double-acting hydraulic cylinder of the vehicle in Figure 1.
  • Figure 1 shows the front part of a vehicle 1 with a tiltable driver's cab 2.
  • the cab 2 is as usual arranged on chassis 3 and connected to chassis 3 via hinge means 4.
  • the hinge means 4 are designed such that the cab 2 can be displaced through an angle with respect to the chassis 3 about a hinge axis defined by the hinge means 4 between a driving position and a tilted-forward position shown in Figure 1.
  • maintenance can be carried out on the vehicle 1, in particular on the engine.
  • a double-acting hydraulic cylinder 6 is provided, of which piston rod 7 is connected to the cab 2 and cylinder body 8 is connected to the chassis 3.
  • the cylinder 6 which furthermore also comprises a hydraulic pump unit which can be actuated manually and/or driven electrically and is fastened to the chassis 3, a force can be exerted on the cab 2, which force is able to tilt the cab 2 forwards out of the driving position and back again.
  • Figure 2 shows the double-acting hydraulic cylinder 6 in detail.
  • the cylinder 6 has an elongate, substantially cylindrical cylinder body 8 with a piston rod 7 which can be moved in a reciprocating, rectilinear manner with respect to the body.
  • the cylinder body 8 has a cylinder base 9 and a cylinder head 10, so that a cylinder chamber 11 is formed.
  • the piston rod 7 projects through a bore 12 in the cylinder head 10 and outwards through sealing means 13 arranged therein.
  • a piston 14, which is connected to the piston rod 7, forms the division between a cylinder-base-side working chamber 15 and a cylinder-head- side working chamber 16.
  • the piston rod 7 is provided with a central blind bore 18, which is open at the cylinder-base- end of the piston rod 7 and extends in the direction of the other end of the piston rod 7.
  • the free end of the tube 17, which is arranged on the cylinder base 9, projects into the blind bore 18 in the piston rod 7, sealing means 19 being provided in the region of the cylinder-base-side end of the piston rod 7 between the tube 17 and the piston rod 7.
  • the tube 17 is provided with one or more openings
  • the piston rod 7 is provided with one or more passages 21, which connect the relevant part of the blind bore 18 to the cylinder-head-side working chamber 16 of the cylinder 6.
  • the cylinder base 9 is provided with a connection 23 for a hydraulic line, which connection leads, via a duct 24, the tube 17, the blind bore 18 and the passages 21, to the cylinder-head-side working chamber 16.
  • the cylinder base 9 is also provided with a connection 26 which leads, via a duct 27, to the cylinder-base-side working chamber 15. Both connections 23 and 26 are intended to be connected to the hydraulic pump unit (not shown) of the tilting device.
  • connection 26 To tilt the cab 2 shown in Figure l forwards, hydraulic fluid is supplied via connection 26 to cylinder- base-side working chamber 15, while hydraulic fluid flows out of the cylinder-head-side working chamber 16 via the tube 17.
  • hydraulic fluid When tilting the cab 2 back into the driving position, which corresponds to the piston rod 7 sliding inwards, hydraulic fluid is supplied to working chamber 16 via the connection 23 and the tube 17, while fluid flows out of the working chamber 15 via duct 27 and connection 26.
  • the above-described tilting cylinder 6 can be implemented in a technically simple manner and at low cost.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Actuator (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

L'invention concerne un dispositif basculant destiné à un véhicule (1) doté d'une cabine basculante (21). Le dispositif basculant comprend un vérin hydraulique (6) à double effet disposé dans une chambre (11), qui comporte un tube (17) fixé à la base (9) du vérin et dirigé vers la tête (10) de ce dernier. La tige (7) du piston présente, au niveau de son extrémité située du côté de la base du vérin, un trou aveugle (18) dirigé vers son autre extrémité. Le tube se projette dans le trou aveugle (18), et communique avec la chambre délimitée par un système obturateur (19) et par le trou aveugle de la tige. Cette chambre communique avec la chambre de travail (16) située du côté de la tête du vérin.
PCT/NL1997/000501 1996-09-05 1997-09-01 Dispositif basculant pour vehicule a cabine basculante WO1998009864A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP97940460A EP0923483A1 (fr) 1996-09-05 1997-09-01 Dispositif basculant pour vehicule a cabine basculante

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1003963 1996-09-05
NL1003963A NL1003963C2 (nl) 1996-09-05 1996-09-05 Kantelinrichting voor een voertuig met een kantelbare cabine.

Publications (1)

Publication Number Publication Date
WO1998009864A1 true WO1998009864A1 (fr) 1998-03-12

Family

ID=19763464

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1997/000501 WO1998009864A1 (fr) 1996-09-05 1997-09-01 Dispositif basculant pour vehicule a cabine basculante

Country Status (3)

Country Link
EP (1) EP0923483A1 (fr)
NL (1) NL1003963C2 (fr)
WO (1) WO1998009864A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1008475C2 (nl) * 1998-03-04 1999-09-07 Applied Power Inc Dubbelwerkende hydraulische aandrijfcilinder, in het bijzonder voor het kantelen van een cabine van een voertuig.
CN104863924A (zh) * 2015-05-24 2015-08-26 南京理工大学 三腔动力液压缸

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306348A (en) * 1941-11-12 1942-12-22 Shell Dev Hydraulic lift for forward-tilting cabs
FR2526778A1 (fr) * 1982-05-12 1983-11-18 Gemmer France Dispositif de levage hydraulique de securite a double verin, muni d'un clapet simple pilote ou non et d'un clapet sequentiel pilote

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2306348A (en) * 1941-11-12 1942-12-22 Shell Dev Hydraulic lift for forward-tilting cabs
FR2526778A1 (fr) * 1982-05-12 1983-11-18 Gemmer France Dispositif de levage hydraulique de securite a double verin, muni d'un clapet simple pilote ou non et d'un clapet sequentiel pilote

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1008475C2 (nl) * 1998-03-04 1999-09-07 Applied Power Inc Dubbelwerkende hydraulische aandrijfcilinder, in het bijzonder voor het kantelen van een cabine van een voertuig.
WO1999045280A1 (fr) * 1998-03-04 1999-09-10 Applied Power Incorporated Verin hydraulique a double effet permettant, en particulier, d'incliner la cabine de conduite d'un vehicule
CN104863924A (zh) * 2015-05-24 2015-08-26 南京理工大学 三腔动力液压缸

Also Published As

Publication number Publication date
EP0923483A1 (fr) 1999-06-23
NL1003963C2 (nl) 1998-03-06

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