FR2875906A1 - Measuring, adjusting and verifying device for motor vehicle, has angular units mechanically connected by two transmissions with cardan joints, and jack connected to frame and support plate to bring closer/separate sub-assemblies - Google Patents

Abstract

The device has sub-assemblies (A1, A2, A1`, A2`) receiving four wheels of a vehicle. Angular units (27, 27`) are mechanically connected by two transmissions (28, 29) with cardan joints in which one transmission is telescopic. The sub assemblies (A1, A2) form a unit (B) with a frame (9). A jack (12) is connected to the frame and a support plate (11) to bring closer or separate the sub-assembly (A2) from the sub-assembly (A1).

Description

2875906 1

  The present invention relates to a device that allows the passage to the test bench of all motor vehicles with or without Electro Stabilizer Programmed (ESP), drive wheels at the front, rear or 4X4.

  The technical sector of the invention is that of measuring a distance, a speed, a control of engine speed, braking.

  Equipment for such controls has long been known: rollerbanks that simulate a road, the wheels of the vehicle to be tested are mounted on rollers and rotate on them by driving or being driven by them.

  However, unless of a large diameter (several tens of centimeters) generating considerable costs during the installation of a device, the rollers cause deformation of tires harmful to their structure.

  The low contact surface causes slippage, the stability of the vehicle is random especially when the drive wheels are at the front.

  the belts of the type of the patented device NFRE0297007 of June 10, 1988 allow thanks to poly V-pulley-belt assemblies to receive the driving wheels in rotation of a vehicle.

  This compact device provides unparalleled vehicle stability, does not distort the metal structure of the tires and because of the excellent adhesion between the surface of the tires. pneumatic tires and belt coating give remarkable results in terms of distance measurement and speed.

  - Measuring and control devices of the type of device patented France N 9814511 of November 16, 1998 and Europe N 00927 326.9 of May 11, 2000 allow a remarkable management of the measurements carried out on any type of bench or on road.

  All the systems mentioned above in the absence of suitable means, object of the present invention do not allow the control of permanent 4X4 vehicle or certain vehicles equipped with Electro Stabilizer Programmed (ESP).

  - The first problem is to make the bench compatible with all wheelbases of different vehicles.

  The second problem is to drive simultaneously and at the same speed the four wheels of a vehicle running on the bench that the latter is traction, propulsion or 4X4.

  - The third problem is to allow a disengagement between the drive of the front and rear train. In the case where the vehicle does not require for its control the driving of its four wheels.

  The fourth problem to be solved is to make the drive of each of the four wheels independent so that the rotational speeds of the different wheels can be measured independently of each other, to be able to compare them with each other and to measure the distances converted into pulses for each wheel. the final stop in rotation following a braking.

  A solution to the problems posed, object of the present invention is a device characterized in that it comprises four subassemblies each receiving a driving wheel or not, in rotation mechanically interconnected by transmissions cardan joints, referrals. angles or (and) hydraulic gear pumps, or (and) electric motors controlled so that the wheels of the vehicle, either by the engine specific to the latter, or by at least one external motor, rotate at the same speed.

  A solution to the problems posed, object of the present invention is a device characterized in that it comprises adjustments allowing the approximation or removal of the four subassemblies so that the subsets adapt to the tracks and wheelbases of the various vehicles .

  Another solution to the problems posed, which is the subject of the present invention, is a device characterized in that it comprises at least one disengageable coupler between the two receiving subsections of the front wheels of the vehicle and the two subassemblies receiving the rear wheels of the vehicle of so that when necessary, only the two wheels of the front axle or only the two wheels of the rear axle are rotating.

  Another solution to the problems posed, object of the present invention is a device characterized in that it comprises an electric motor-drive integrally adapted to each of the four subassemblies, which drive the four wheels of the motor vehicle on, speed in neutral , so that during braking the four motor-drives, by means of relays stop being electrically powered and that can be measured and compared distances, converted into N pulses, traveled before immobilization of each subset.

  The result is a new measurement and verification device for any traction-driven automotive vehicle equipped with ESP or 4X4.

  An application of this device is a valuable aid to the verification of speedometer, tachometer and speed limiters of motor vehicles.

  An application of this device is a valuable aid in the adjustment of motor vehicle engines.

  An application of this device is a valuable aid to the technical verification of vehicles including braking and pollution.

  The following description refers to the accompanying drawings which represent, without any limiting character, examples of embodiments of the device according to the invention.

  These examples are not exhaustive and other arrangements may be envisaged, in particular, there is shown: An example of the device for accommodating the four wheels of a vehicle so that the four wheels rotate at the same speed to mechanical drive members.

  An example of the device with mechanical and hydraulic drive members, but the drives could all be hydraulic. The device could be added an external motor that would allow the rotation of all subassemblies without soliciting the engine of the vehicle.

  - An example of the device with electric drives, but the different types of embodiment and drive can be combined with each other.

  In all these examples, the new device has an electro-computing subsystem management known and not shown.

  - Subsets intended to accommodate the wheels of the vehicle are represented with pulley-belt systems but they could be composed of simple rollers or other belt profiles.

  Figure 1 is a view of a poly V pulley-belt subassembly uncoated belt.

  FIG. 2 is an overall view of the device with the wheelbase and track settings and the different subsets of which are mechanically interconnected.

  FIG. 3 is an overall view of the device, the subassemblies of which are mechanically connected from the right to the left and hydraulically from the front to the rear.

  Figure 4 is a view of a hydraulic system in traction mode (the engine front end of which drives the rear axle).

  Figure 5 is a view of the hydraulic system in propulsion mode (which the rear engine is used to drive the front axle).

  Figure 6 is a view of the system of which the four subassemblies are driven by four servo electric motor drives.

  The subassembly (A1) according to FIG. 1, intended to receive a vehicle wheel, to be driven by it or to drive it in rotation comprises: a support frame (1) bearing known bearings (2a), (2b) , (2c), (2d) allowing the rotation of 2 poly V pulleys, (3) and (4) coated with a poly V belt not shown.

  The pulley (3) can be connected by its output (5) with a keyway to any mechanical, hydraulic or electrical transmission member. Said pulley (3) is provided with a high resolution pulse encoder (6) connected to a known electro-computing subassembly and not shown for counting and storing the angular displacement of said pulley (3). .

  The lower part of the frame (1) comprises a guide hole (7) of an axis (7 ') not shown around which the subassembly (Al) can pivot so that the wheel and the belt maintain a common direction between them. tangential motion ensuring remarkable stability. Balls (8) secured to the frame facilitate the rotation of the subset (Al) around the axis not shown (7 ').

  The four subsets (A1), (A2) and (A1 '), (A2') according to Figure 2 are intended to receive the wheels of the vehicle.

  Subassemblies (A1) and (A2) form an assembly (B) with the frame (9) fixed to the ground. The subassembly (A1) is fixed in translation, the subassembly (A2) is connected to the subassembly (A1) by a transmission with cardan joints (10) telescopic, the subassembly (A2) is subject to a support plate (11) which can translate and is guided laterally on the frame (9) by any known means. The cylinder (12) secured on one side to the frame (9) and on the other to the support plate (11) makes it possible to bring the subassembly (A2) closer to or away from the subassembly (Al) so that the distance between the two subsets (Al) and (A2) can be perfectly adjusted to the vehicle lane. The subassembly (A2) comprises on the outer axis of the pulley (3) a braking or locking system (13) for immobilizing the pulleys / belts in rotation, thereby allowing the vehicle to leave the vehicle. bench.

  Ramps (14) and (15) fixed to the ground allow the vehicle to access the device.

  The tracks (16) and (17) fixed to the ground comprise on the sides of the tracks (18) on which the moving tracks (19) and (20) each have two rollers (21).

  Said mobile tracks are integral with the movable frame (9 ') itself provided with 8 rollers (22) located on either side under the securing of the movable tracks (19) and (20) to the frame (9') and under the subjections of said frame to the movable ramps (23) and (24). The movable tracks (19) and (20), the movable frame (9 ') carrying the subsets (A1') and (A2 '), the movable ramps (23) and (24) therefore form a moving subassembly (M ) which can be moved away from or closer to the fixed subset (F) by means of the jack (25) or any other system, motorization, chains / gears, pinion / rack ... thus allowing the subsets (F) and ( M) to be adjusted to the wheelbase of the vehicle. A guide (26), fixed to the ground, maintains the axis of the moving subassembly during its movements.

  The angle references (27) and (27 ') are secured to the support frames (1) and (1') so that they can follow the pivoting subsets (Al) and (A1 '). The shafts passing through said corner references (27) and (27 ') are connected by any known means to the shafts (5) and (5') and to the cardan joint telescopic transmissions (10) and (10 '). The shafts returning said angle returns (27) and (27 ') are interconnected by means of two transmissions with cardan joints (28) and (29) disengageable and at least one of which is telescopic so that the rotational movement of the belt pulley / poly V systems of one of the subsets (A1), (A2), (Al '), (A2') rotates at the same speed the other subassemblies thus eliminating the differential effects between the left and right wheels and the front and rear axle of the controlled vehicle.

  The same effect of eliminating the differential effects of the controlled vehicle is obtained according to FIGS. 3 and 4 by means of two hydraulic gear pumps (30) and (30 ') of the same displacement, secured to the support frames (1) and (1). ') and connected to the shafts (5) and (5') so that: the wheels of a vehicle, not shown, under traction, rotate the pulley-belt / poly V systems of the subsets (A1 ') and ( A2 ') interconnected by the transmission with telescopic cardan joints (10'), that the shaft (5 ') of the subassembly (A2') in turn drives the output shaft of the gear pump (30 ') thus creating a movement of the fluid contained in the reservoir (31). The movement of said fluid actuates the gears of the pump (30) which thereby rotates the subsets (A1) and (A2) at the same speed as the subsets (A1 ') and (A2'). The rear wheels, non-drive, in the case described figure are driven at the same speed by the front wheels.

  The opposite result is obtained according to FIGS. 3 and 5 when a propulsion vehicle drives the non-driving front wheels with its rear drive wheels. The rear wheels drive the pulley-belt / poly-V systems of the subsets (A1) and (A2) which drive the shaft of the gear pump (30), creating the movement of the fluid. Said fluid in turn drives the gear pump (30 ') which thereby rotates the subsets (Al') and (A2 ') at the same speed as the subassemblies (A1) and (A2).

  The fluid contained in the reservoir (31) circulates in a pipe (32) partially flexible to adapt to the different displacements of the moving parts of the device. The fluid flow direction changes corresponding to different drive modes (traction or propulsion vehicle) are obtained by means of electrically controlled control valves (33) and (33 ').

  At least one coupler (C) or (C ') disengageable is interposed between the pulley shaft (5) or (5') and the pump shaft (30) or (30 ') so that, in the case of a traditional vehicle not requiring for its control the setting in movement of its two axles, only the front gear or only the rear train is in movement.

  When passing on the device, a 4 * 4 vehicle, traction or propulsion modes can be indifferently selected.

  A reduction in the flow rate of the fluid in the driving gear pump (30) or (30 ') obtained by means of the regulating distributors (33) and (33') will make it possible to inflict a quantized resisting torque to the drive wheels of the vehicle, so that a climb can be simulated and pollution checks in load, carburettor and ignition settings can be operated thus saving the traditional test drive after intervention.

  A blocking mode, according to Figure 3, closes the flow of fluid in the pumps (30) and (30 ') prohibiting the rotation of the gears of said pumps, so that the vehicle can leave the bench after its control.

  The same result for rotating the four wheels of a controlled vehicle at the same speed, is obtained according to FIG. 6, by means of four motor-drive controllers of the same characteristics and servo-controlled (34a), (34b), (34b), 34a '), (34b') supported by unrepresented plates. The said plates are secured to the support frames (la), (lb), (l a '), (l b') by any known means ..

  The shafts of the variable speed drives are connected to the shafts (5a), (5b), (5a '), (Sb') to the known coupling means so that the wheels of a vehicle, engine running, speed to the point death, can be driven by the subsets (Al), (A2) and (A1 '), (A2') in rotation at the same speed.

  The shafts (5a), (5b) and (5a '), (5b') are provided with known torque-meters (35a), (35b), (35a ') (35b') and with the same characteristics, so that the resistant torques inflicted on each of the shafts can be measured, compared with each other, recorded and printed by means of the electro-computing unit of known management, not shown. During the check, the starting of the four motor-dimmers is triggered by the operator, when the desired speed of the four motor-drives is reached, the operator requests the braking system. The torque meters detect the increase of the resistant couples. transmit the information to the electroinformatic subassembly which triggers the torque measuring and counting operations of the encoders (6a), (6b) and (6a '), (6b') so that, in addition, the comparison of the braking torques to left and right on the front and rear trains, can be measured the distance required for total immobilization of the device and the wheels of the vehicle, taking into account the nominal speed of the motor-drives and the weight of said vehicle.

  During braking, the variable speed drives continue to drive in rotation the subassemblies (A1), (A2), (A1 ') and (A2') thus simulating the parameterized inertia of the vehicle until, the speed decreasing and the resistant couples increasing very quickly, a relay cuts the power of the motor-drives so that the resisting torque limit beyond which the wheels of the vehicle leave the device, is not reached. 10

20 25 30

Claims (1)

9 CLAIMS   1-) Control device, adjustment and measurement characterized in that it comprises: four subsets (Al.), (A2), (Al '), (A2') for receiving the four rotating wheels a vehicle; tracks and ramps for placing the wheels of the vehicle on said subsets (A1) _4 (A2), (A1 '),. (A2') and an electro-computing subset, known and not shown, manager of information from subsets (Al), (A2), (Al '), (A2').   Said subassemblies (A1), (A2), (A1 '), (A2') each comprise a carrier frame (1) bearing known bearings (2a), (2b) _, (2a '),. (2b ') which allow the rotation of two rollers or two pulleys (3) and (4) coated with a belt of the same profile or design as said. pulleys.   The subassemblies (A1), (A2), (A1 '), (A2') are each provided with a guide hole (7), said subassemblies are fixed to the fixed frames (9) and (9 ') mobile on which they rest by pivot pins (7 ') and balls (8) which facilitate the pivoting of the subassemblies around the axes (7'). 2-) Device according to claim 1 characterized in that it comprises: on either side of the frame (9) fixed to the ground and carrying subsets (A1) and (A2), fixed access ramps to ground (14) and (15), fixed ground tracks (16) and (17) each having rolling paths (18) on which the movable tracks (19) and (20) with rollers (21) translate and secured to the mobile frame on the ground (9 ') carrying subsets (Al') and (A2 ') and itself provided with translation rollers (22).   The said movable frame (9 ') is integral with the movable ramps (23) and (24). The motor (25) and the _guide translation (26) to move away from or closer to the movable frame (9 ') of the fixed frame (9). 3-) Device according to claim 1 and claim 2 characterized in that it comprises: two subsets (Al) and (Al ') fixed in lateral translation on the fixed frame (9) and on the movable frame (9' ); two subsets (A2) and (A2 ') movable laterally on the fixed frame (9) and on the movable frame (9'); two motorizations (12) and (12 ') which make it possible to bring the moving subsets (A2) and (A2') closer to or away from the fixed subsets (A1) and (A1 '). 4-) Apparatus according to claim 1, claim 2 and claim 3 characterized in that it comprises: high resolution pulse coders (6a), (6b), (6a '), (6b'); torque meters (35a), (35b), (35a '), (35b'_); detachable couplers (C) and (C '); brakes or blockers (13); regulating distributors (33) and (33 ') integrally mounted on the output shafts of the pulleys or rollers (3a), (3b), (3a'), (3b ') of the subsets (Al), (A2) , (Al '), (A2'); two engines of adjustment to the track. (12) and (12 '), a wheelbase adjustment motor (25). All these different elements are connected to the electro-computing subsystem management known by known connection cables.   5-) Device according to claim 1 characterized in that it comprises: a bevel gear (27), a telescopic transmission with connecting universal joints (10) between the output shafts pulleys or rollers (3a) and (3b) subsets (A1) and (A2); a bevel gear (27 ') of the same characteristics as (27), a telescopic transmission with connecting universal joints (10') between the output shafts of the pulleys or rollers (3a ') and (3b') of the sets (Al ') and. (A2'); two telescopic transmissions with detachable connecting universal joints (28) and (29) between the shafts returning the angle references (27) and (27 '). 6-) Device according to claim 1, claim 4 and the claim characterized in that it comprises: a fluid reservoir (31); a partially flexible pipe (32); regulating distributors (33) and (33 ') or (33a), (33b), (33a'), (33b '); gear pumps (30) and (30 ') or (30a), (30b) (30a') (30b ') of the same displacements connected to the output shafts of the pulleys or rollers (3) and (3') or (3a), (3b), (3a '), (3b') with detachable couplers (C) and (C '). 7-) Device according to claim 1, claim 4 and claim 6 characterized in that the regulating distributors (33) and (33 ') or _ (33a), (33b) (33a') (33b ') can reverse , reduce the flow of fluid or block it in the gear pumps (30) and (30 ') or (30a), (30b), (30a'), (30b ').   8-) Device according to claim 1, claim 4, claim 5 and claim 6 characterized in that it comprises: motor-drives (34a), (34b), (34a '), (34b') of the same controlled and controlled characteristics whose shafts are connected to the output shafts of the shears (3a), (3b), (3a '). (3b') provided with encoders L6a), (6b)., (6a '), (6b ') and torque-meters (35a), (35b), (35a'), (35b '). 9-) Device according to claim 1, claim 4 and claim 8 characterized in that the motor-drives (34a), (34b), (34a '), (34b') cease to be electrically powered by means of known relays, just before the resistant limit torque that would make the vehicle exit the bench is reached during braking.   10-) Device according to any one of the preceding claims, characterized in that the different drive systems subsets (Al), (A2), (Al '), (A2'.) At the same mechanical speed, hydraulic or electric can be combined with each other.