Classifications

• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
  • G01M15/00—Testing of engines
  • G01M15/04—Testing internal-combustion engines
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
  • G01M15/00—Testing of engines
  • G01M15/02—Details or accessories of testing apparatus
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
  • G01M17/00—Testing of vehicles
  • G01M17/007—Wheeled or endless-tracked vehicles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60Y—INDEXING SCHEME RELATING TO ASPECTS CROSS-CUTTING VEHICLE TECHNOLOGY
  • B60Y2304/00—Optimising design; Manufacturing; Testing
  • B60Y2304/09—Testing or calibrating during manufacturing

Definitions

• the present invention relates to internal combustion engines. It relates more particularly to the starting of internal combustion engines intended to be equipped with an automatic transmission on the test benches at the end of assembly lines.
• flywheels of this type are equipped with central splines. These splines are used at the end of the assembly line to secure the crankshaft to a drive shaft that will start the engine.
• flywheels installed on engines that will be equipped with an automatic gearbox do not have central splines. They must nevertheless be tested at the end of the production line and thus be started.
• the previous solution to solve this problem was to mount on the flywheel a false clutch. For this, the operator had to fix this tool by hand, in place of the final gear box converter, using four screws by rotating the flywheel to access the screw holes. This operation in addition to being physically demanding for the operator was greedy in cycle time.
• the present invention proposes to overcome the aforementioned drawbacks by providing a removable means of adding a central spline drive to the motors which will be equipped with an automatic gearbox, particularly simple and quick to implement.
• the device according to the invention is provided with a central grooved inner region of connection with the drive shaft and fastening means on the flywheel.
• the device according to the invention is removable and the fixing means rest on a shoulder of the flywheel.
• the fastening means move simultaneously and radially relative to the flywheel in a reversible manner.
• the device according to the invention comprises positioning means relative to the flywheel, these means being constituted by the cooperation of indexing pins and holes made in the flywheel.
• the fastening of the fastening means on the flywheel is ensured by means of a ring gear whose axial displacement results in a radial displacement of the fastening means towards the outside of the device against the shoulder of the steering wheel. engine.
• the axial displacement of the ring is triggered by the rotation of a toothed wheel caused by the action of a key.
• the device according to the invention is provided with locking means of the fixing means.
• the clamping of the locking means is provided by means of a toothed wheel whose rotation results in an axial displacement of the locking means to their support against the crown.
• the axial displacement of the locking means is triggered by the rotation of a gear wheel caused by the action of a key.
• the toothed wheel of the locking means and the toothed wheel of the fixing means are concentric and provided with recesses.
• FIG. 1 a front view of the device according to FIG. invention fixed to a flywheel for observing by transparency the internal mechanism of said device.
• Figure 2 is an axial longitudinal sectional view of Figure 2 along the axis AA.
• Figure 3 is a detail view of the upper part of Figure 3 cooperating with a first hex key
• Figure 4 a detail view of the upper part of Figure 3 cooperating with a second hex key.
• Figure 1 is a front view of the device according to the invention attached to a flywheel and
• Figure 2 is an axial longitudinal sectional view of Figure 1.
• the latter figure allows to see by transparency the internal mechanisms of operation of said device .
• the introduction of the device 41 on the flywheel is facilitated by four guiding pins 9 (only one of which is visible in FIG. 3), situated on the back of the device 41, coming to fit on the flywheel, in place and place screws fixing the converter of the automatic gearbox.
• These guide pins 9 come to index and pre-immobilize the tool in the flywheel, and also allow the transmission of torque when starting the engine bench test.
• the device according to the invention is fixed to the flywheel by means of three clamping jaws 30, 31, 32 bearing on the inner surface of the shoulder of the flywheel. Inertia 44. Still referring to Figures 2 and 3, we will better understand the operation and the elements constituting the movement mechanism of one of the three clamping jaws, the other 2 being equipped with the same mechanism.
• These jaws are assembled by means of a screw 26 to pistons 16 partially hollowed out.
• These recesses receive springs 19 for holding the pistons 16 resting on the frustoconical portion of a ring 13.
• This ring 13 is threaded on the outer surface of its annular portion, and cooperates with the internal thread of a toothed ring 11 in which it fits.
• This ring is further provided with an annular groove in which is inserted a guide pin in axial translation 33.
• the ring gear 13 cooperates with it with a toothed wheel 7, provided at its center with a first recess 7.1 of hexagonal cross-section over a portion of its length, and a second recess 7.2 of circular section over the rest of its length.
• the circle inscribed in the regular hexagon of the section of the first recess 7.1 has a diameter greater than that of the circular cross section of the second recess 7.2. This difference in diameter is intended to provide an internal shoulder to this toothed wheel 7.
• the device according to the invention is provided in addition with a ring 47 for not loosening the jaws 30, 31, 32.
• This ring 47 is chanfine so as to obtain a surface complementary to that of the frustoconical portion of the ring 13.
• This ring 47 is further provided with a circular groove cooperating with an axial translation guide pin 14, and is threaded on its outer surface. This external thread cooperates with the internal thread of a toothed wheel 12 in which the ring 47 fits.
• the toothed wheel 12 is provided to be actuated by another toothed wheel 8 coaxial with the toothed wheel 7.
• This wheel 8 is provided with a first recess 8.1 of hexagonal cross-section over a portion of its length, and a second recess 8.2 of circular cross section over the rest of its length.
• the circle inscribed in the hexagon of the section of the first recess 8.1 has a diameter greater than that of the circular cross section of the second recess 8.2. This difference in diameter is intended to provide an internal shoulder to the toothed wheel 8.
• the device according to the invention is further provided with four central spring (51) located near the grooves intended to dampen the coupling when starting the engine at the test bench.
• the operator of the bench puts in contact with the four guiding pins 9 of the device 41 with the holes of the four screw fixing the converter flywheel. He then inserts the four pieces into the screw holes. This operation allows a pre-immobilization of the tool.
• the ring gear 13 is abutted on the rear face 18 of the device according to the invention.
• the spring 19 is at rest and maintains the piston 16 in support on the front of the frustoconical portion of the crown 13.
• the jaws 30, 31 and 32 are not in contact with the flywheel.
• the ring 47 of loosening is abutted on the front face 48 of the device 41 and is not in contact with the ring 13.
• the operator rotates the toothed wheel 7 using a hexagonal wrench provided to cooperate with the recess 7.1, as visible in Figure 3.
• the geometric differences between the two recesses 7.1 and 7.2 realize a shoulder internal to the toothed wheel
• the dimensions of the hexagonal key are intended to allow it to pass through the recesses 7.1 and 7.2 of the toothed wheel 7 and to rotate only the toothed wheel 8 as can be seen in FIG. 4.
• the key 36 is radially stopped by the internal shoulder formed inside the toothed wheel 8. The rotation printed by the operator on the key 36 causes the rotation of the toothed wheel
• the next step is to match the internal splines of the device according to the invention with the external splines of the drive shaft 42.
• the operations described above are carried out in the reverse order.
• the drive shaft 42 is detached from the device according to the invention 41.
• the unlocking system of the jaws is then unlocked using the hexagonal wrench 36.
• the next step is to to cause the jaws 30, 31, 32 to enter the device 41 by actuating one of the toothed wheels 7 by means of the hexagonal wrench 35.
• the device 41 is detached from the target flywheel 44.
• One of the advantages of the invention is the fact that by actuating only one of the three toothed wheels 7, the three clamping jaws 30, 31, 32 are set in motion, which allows a considerable saving of time.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Combustion & Propulsion (AREA)
• Testing Of Engines (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=35607666

Family Applications (1)

Country Status (5)

Families Citing this family (2)

Family Cites Families (11)

• 2005
  • 2005-06-24 FR FR0551758A patent/FR2887602B1/fr not_active Expired - Fee Related
• 2006
  • 2006-06-22 WO PCT/FR2006/050618 patent/WO2006136756A2/fr not_active Application Discontinuation
  • 2006-06-22 JP JP2008517561A patent/JP4906853B2/ja not_active Expired - Fee Related
  • 2006-06-22 EP EP06778963A patent/EP1896821A2/fr not_active Withdrawn
  • 2006-06-22 KR KR1020077027309A patent/KR20080017323A/ko not_active Application Discontinuation

Non-Patent Citations (1)

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