FR2789064A1 - Lift for power unit in car includes hook engaging walls of anchoring cavity having slot and circular eyelet - Google Patents

Abstract

The lifting device for a power unit comprises a hook (3) which engages the walls of an anchoring cavity (1). This button hole shaped cavity is made inside a part of the power unit and comprises upper part, shaped as slot (6), and lower part, shaped as circular eyelet (7).

Description

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LIFTING DEVICE FOR A GROUP

MOTOR-PROPELLER

  The present invention relates to a lifting device for a powerplant, and more particularly a lifting device, for a powerplant in a motor vehicle, comprising

  a hook cooperating with the walls of an anchoring cavity.

  During after-sales interventions, lifting the power unit

  propellant may be necessary and it is, in this case, essential to have a device allowing this operation. Thus, for example, this problem has been solved by equipping the cylinder head of an internal combustion engine with attached lifting clips, intended to cooperate with

  lifting hooks outside the vehicle.

  However, the use of lifting clips, protruding from the cylinder head and pointing upwards, can prove to be troublesome and particularly cumbersome in the engine block of the vehicle. It is indeed necessary, in this case, to keep these fasteners, on the one hand, always accessible from above the powerplant and, on the other hand, sufficiently prominent to allow their cooperation with the lifting hooks. Their size becomes, therefore, not negligible

in the engine block.

  The object of the invention is to remedy these drawbacks by proposing a lifting device for a powertrain which occupies a

reduced space in the engine block.

  To this end, the invention provides a lifting device comprising a hook cooperating with the walls of an anchoring cavity, formed at

  inside an element of the powertrain.

  According to another characteristic of the invention, the anchoring cavity is a buttonhole, comprising an upper part, in the form of a slit, and a lower part, in the form of a circular eyelet, said parts extending

  by a notch, intended to accommodate the hook.

  According to another characteristic of the invention, the end of the hook having the shape of a spherical end piece, is intended, during the lifting operation, to come into abutment against the walls of the upper end of the notch. According to another characteristic of the invention, the spherical end piece, during the lifting operation, enters the notch via the eyelet, rises towards the slot and remains trapped behind the plane defined by

the walls of the latter.

  According to another characteristic of the invention, the element of the powertrain, housing the anchoring cavity is a cylinder head of

internal combustion.

  Other advantages and characteristics of the invention will be put in

  evidence in the following description, given by way of example, with reference

  in the accompanying drawings o: - Figure 1 is a schematic perspective view of an example of

  production of two lifting devices according to the invention.

  - Figure 2 is a schematic sectional view of one of these devices

lifting.

  Figure I schematically represents two lifting devices according to the invention o, for each of these devices, the anchoring cavity is a buttonhole 1 integrated in a cylinder head 2 of an internal combustion engine. A hook 3 is intended to cooperate with the walls of

this buttonhole.

  -3 - As shown in Figure 2, the hook 3 has, at its lower end, a spherical tip 4. The upper end 5 of the hook is

  intended to be entered by the user.

  The buttonhole I is made inside the cylinder head 2. For example, this buttonhole is in the rough foundry form, molded

  during the manufacture of the cylinder head.

  In the plane defined by the external surface of the yoke 2, the buttonhole has an upper part 6 in the form of a slit, widened by a lower part 7, in the form of a circular eyelet. Slot 6 and eyelet 7

  io are extended, inside the cylinder head, by a notch 8.

  The width of the slot 6 is less than the diameter of the spherical end piece 4 of the hook 3 but substantially greater than the thickness of the rest of the hook. The diameter of the circular eyelet 7, the depth and the width of the notch 8 are substantially identical and greater than the diameter of this spherical nozzle. The slot 6, capable of receiving the upper gripping part of the hook 3, therefore opens, inside the cylinder head 2, on

  the notch 8, capable of housing the spherical end piece 4.

  In this way, when it is desired to raise the motor group

  propellant, during after-sales operations, for example, the lifting hooks are introduced into the buttonholes of the cylinder head. Thus, for each lifting device, the spherical end piece 4 penetrates, via the circular eyelet 7, inside the notch 8. When the hook 3 is raised, the spherical end piece moves in the notch to abut against walls 80 of the upper end of the latter. We can

  then lift the powertrain.

  When the spherical end piece 4 moves upwards inside the notch 8, it rises towards the slot 6. Being of diameter greater than the width of this slot, it remains trapped behind the plane defined by the walls -4- of the latter. The attachment between the cylinder head 2 and the hooks 3 is

therefore reliable.

  The lifting device according to the invention thus ensures great safety in use and a minimum space requirement inside the engine block. In addition, the removal of the attached lifting lugs, as proposed by solutions known in the prior art, makes it possible to reduce the number of parts referenced for the assembly of the group.

  motor-propellant, hence a reduction in the manufacturing cost of the latter.

  The invention is not limited to the embodiment described above but encompasses any lifting device for a propulsion unit, composed of a lifting means, cooperating with an anchoring cavity,

  formed inside an element of this powertrain.

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Claims (1)

  [1] Lifting device for a powerplant comprising a hook (3) cooperating with the walls (60, 80) of an anchoring cavity (1), characterized in that said anchoring cavity (1) is arranged inside an element (2) of said power train. [2] Lifting device according to claim 1, characterized in that the anchoring cavity (1) is a buttonhole, comprising an upper part (6), in the form of a slot, and a lower part (7), in the form of a circular eyelet, said parts extending by a   notch (8), intended to house the hook (3).   [3] Lifting device according to claim 2, characterized in that the end of the hook (3), having the shape of a spherical tip, is intended, during the lifting operation, to come into abutment against the   walls (80) of the upper end of the notch (8).   [4] Lifting device according to claim 3, characterized in that the spherical end piece (4), during the lifting operation, enters the notch (8) via the eyelet (7) , goes up towards the slot (6) and remains trapped behind the plane defined by the walls (60) of the latter.   [5] Lifting device according to one of the preceding claims,   characterized in that the element (2) of the powertrain, housing   the anchoring cavity (1) is a cylinder head of an internal combustion engine.