Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
  • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
  • B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
  • B25B27/0035—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for motor-vehicles
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
  • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
  • F01L13/0021—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of rocker arm ratio
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
  • F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
  • F01L13/0063—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot
  • F01L2013/0068—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque by modification of cam contact point by displacing an intermediate lever or wedge-shaped intermediate element, e.g. Tourtelot with an oscillating cam acting on the valve of the "BMW-Valvetronic" type
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L2303/00—Manufacturing of components used in valve arrangements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
  • F01L2303/00—Manufacturing of components used in valve arrangements
  • F01L2303/01—Tools for producing, mounting or adjusting, e.g. some part of the distribution

Definitions

• the present invention relates to a device for positioning and fixing by screwing a subassembly in an inaccessible area of a vehicle, including the positioning and fixing by screwing an electric drive motor d eccentric shaft on the cylinder head of a motor vehicle engine.
• the present invention also relates to a method of positioning and fixing by screwing a subassembly in a poorly accessible area of a vehicle, which uses such a device according to the invention.
• the object of the present invention is to provide a technical and ergonomic solution for assembling a subassembly in an inaccessible area of a vehicle, in particular when the fastening of the subassembly uses screws of fixing without pilot bit.
• the object of the present invention is to provide a device for the implementation of such an assembly solution, which allows to facilitate the work of the assembly operator by avoiding any "blind" work.
• the present invention relates to a device for positioning and fixing by screwing a subset on a support in a poorly accessible area of a vehicle, and this new device comprises a main body in which is housed by shape matching said subassembly to be positioned, said main body having at least one housing for a fastening screw of the subassembly on the support, and at least one screwdriver with adapter corresponding to the fixing screw.
• the device according to the invention can bring in position on the support the subassembly, its fixing screws and the corresponding screw bits in the form of a single unit, which facilitates the work of an operator, avoiding for this one any work in blind even in a context with strong ergonomic constraints.
• the device further comprises a subset locking means in position in said main body.
• the device comprises at least one guide plate having at least one passage of a screw terminal.
• the guide plates each comprise a passage opening of a screwdriver bit.
• the guide plates for the passage of the screw bits are substantially circular profile plates with a flat part in the upper part, and, moreover, these plates are stacked coaxially on the lateral face of the main body opposite to the fixing screws, guide plates other than guide plate in direct contact with said main body having a cutout to allow access to all screwdrivers.
• the subassembly locking means in the main body is constituted by a latch in the form of a hook movable in rotation in a plane above the main body, the hook having an axis of rotation located in the median plane of the main body and perpendicular to the longitudinal axis of the latter.
• each screw bit of a fixing screw preferably comprises an adapter at its end opposite to the fixing screw and a stop ring abutting the movement of the screwdriver bit during screwing. of the fixing screw.
• the number of fixing screws is preferably two, and the device then comprises, accordingly, two screw bits and two screw tip guide plates.
• a device according to the invention will include the number of screws and corresponding nipples required.
• the present invention also relates to a method of positioning and fixing by screwing a subassembly on a support in an inaccessible area of a vehicle, and this new method comprises the following steps, taken in combination :
• the method further comprises closing the latch of the device in order to lock in position the subassembly, and the opening of the latch of the positioning device to remove it.
• the subassembly may be an eccentric shaft drive motor and the support may be the cylinder head of a motor vehicle engine, said shaft motor with eccentric being fixed to said cylinder head by two fixing screws.
• FIG. 1 schematically illustrates the mounting position of an eccentric shaft drive electric motor on the cylinder head of a motor vehicle engine
• FIG. 2 is a perspective view of an embodiment of a device according to the present invention for positioning and fixing by screwing an eccentric shaft drive electric motor on the cylinder head; of a motor vehicle engine
• FIG. 3 is an exploded view of the different parts that make up the positioning and fixing device of FIG. 2
• - Figure 4 is a perspective view of the device of Figures 1 and 2 on which are set up the eccentric shaft motor fixing screws on the cylinder head, and
• FIG. 5 is a perspective view of the device of Figure 4 on which is set up the eccentric shaft motor to position and fix.
• an eccentric shaft drive electric motor fixed on the cylinder head 2 of a motor vehicle engine.
• the electric motor 1 drives, via a gearbox, the eccentric shaft, the angular position of the eccentric determines by a known mechanism and not described in this text the position of the intake valve.
• the electric motor 1 is fixed to the cylinder head 2 by means of two fixing screws 5 and 6 screwed into corresponding tappings of the cylinder head 2.
• the attachment interface of the eccentric shaft motor 1 presents a relatively high inclination relative to the vertical, as shown by the position of the connecting plane P. This inclination can, for example, be 34 ° relative to the vertical.
• the difficulty of access of the fixing interface makes it difficult "pinning" and screwing of the fixing screws.
• the device of the present invention an exemplary embodiment of which is described below, has the function of overcoming these difficulties.
• the positioning and fixing device comprises the following parts:
• main body 10 which is in the general form of a hollow half cylinder or "cradle" whose inner wall 10A is intended to receive by pattern matching the eccentric shaft motor 1 to position and to stare,
• the two guide plates 20 and 30 are substantially circular profile plates with a flat portion 22, respectively 32, in the upper part.
• the two plates are stacked co-axially on the lateral face 1 1 of the main body 10 opposite the housing of the fixing screws 3 and 4.
• the screwdriver bit 60 passes through the orifice 26 of the plate 20 and the bore 16 of the main body 10, while the other screwdriver bit 50 not entirely shown through the orifice 35 of the plate 30, the orifice 25 of the plate 20 and the bore 15 of the main body 10.
• This embodiment has a greater ergonomics to ensure the mounting of the shaft motor eccentric 1.
• the latch 40 mentioned above has the shape of a hook 41 movable in rotation in a plane above the main body 10, the hook 41 having an axis of rotation X located in the median plane of the main body 10 and perpendicular to the longitudinal axis DD 'of the latter.
• the hook 41 is mounted on the flat part 32 of the guide plate 30 by means of a hinge represented by the pivot rod 42 screwed into a threaded bore 37 of the flat part 32 of the plate 30 and by the spacer 43.
• each screw bit has an adapter and a stop ring.
• the screwdriver bit 60 shown in FIG. 3, comprises an adapter referenced 62 at its end opposite to that engaged to the fixing screw housing, and a stop ring 64 which stops the movement of the end piece. screwing when tightening the fixing screw, as will be described later in the text.
• Reference 52 designates the adapter of the screwdriver bit 50 partially shown.
• the bore 16 in which is housed said screw bit 50 has a portion 16A whose inner diameter is shaped to accommodate the stop ring 64 in a stroke corresponding to the screwing stroke of the fixing screw. This stroke is also limited by the guide plate 22, the adapter 62 abutting it.
• the end of the screwdriver bit 60 cooperates with the head of the fixing screw 6 engaged in the housing 4, the screwing stroke of the stop ring 64 for screwing the fixing screw 6 on the support. It is the same for each fixing screw and its tip.
• the present invention also relates to a method of positioning and fixing by screwing a subassembly on a support, in particular for positioning and fixing by screwing an eccentric shaft drive electric motor 1 on the cylinder head 2 of a motor vehicle engine in an inaccessible area of the vehicle.
• this method of the invention comprises the following steps: - Implementation of the fixing screws 5, 6 of the shaft motor 1 in the housing 3, 4 ( Figure 4) corresponding to a positioning device and fastening by screwing according to that described above in FIGS. 2 and 3

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Connection Of Plates (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42174311

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (1)

Family Cites Families (7)

• 2009
  • 2009-10-14 FR FR0957195A patent/FR2951130B1/fr not_active Expired - Fee Related
• 2010
  • 2010-10-01 EP EP10778691A patent/EP2488404A1/de not_active Withdrawn
  • 2010-10-01 WO PCT/FR2010/052078 patent/WO2011045501A1/fr not_active Ceased

Non-Patent Citations (1)

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