Rini Blog 70: June 2012

Order No. 1211 Clutch functional model A diaphragm spring clutch is mounted so that it can be turned on a stable tubular steel frame. When engaged, power is able to flow between the disk flywheel and the clutch lining. By pressing the lever it can be seen how the release bearing tilts the outer edge of the diaphragm spring around the tilted rings, thus releasing the clutch disk. The power flow is interrupted.
Order No. 1265 Cutaway model: Clutch with adjustment for wear As a result of the wear and tear on the driving disk, the position of the diaphragm spring alters, which means that the pressure from the diaphragm spring on the ramp shaped setting rings drops. The locking bolt has the effect that the setting rings turn as a result of the tension of the springs. In this way, the clearance between the diaphragm spring and the pressure plate is compensated.
Order No. 1266 Cutaway model: Multi-disk clutch Design of a multi-disk clutch (without disengaging gear). This clutch has a number of internal and external disks in its basket, which means that a large torque can be transmitted despite a small diameter. The pressing force of the disks results from a number of helical springs.	Order No. 1139 Viscous clutch - all externally toothed discs are fixed to the housing - all internally toothed discs are fixed to the driving shaft - power transmission is attained via the shearing effect of the silicone fluid between the slots and the holes in the discs (in the cutaway model there is no silicone fluid)
Order No. 1160 Hydraulic coupling Also called fluid clutch - function of the pump wheel - function of the turbine wheel - mounting of the turbine wheel	Order No. 1155 Multi-disk clutch for mopeds Interaction of piston, connecting rod, crankshaft and clutch. No power flow at low revs. Power flow at high revs by means of flyweights. Power flow on pressing the starting lever.
Order No. 1157 LUK dual-mass flywheel Structure of a dual-mass flywheel: - function of the pressure springs when subject to torsional vibrations - function of the torsional-vibration damper between primary and secondary flyweights; the primary flyweight on the model can be turned against the force of the springs	Order No. 1293 Planetary dual-mass flywheel - Rotation of the secondary fly wheel mass against the primary flywheel - Pressing the springs together in their guide shoes to absorb vibrations by ignition induced rotary unevenness of the motor - Acceleration of the planetary wheels, which attenuate the vibrations of the springs thanks to their friction
Order No. 1226 Clutch model case - hydraulic clutch control mechanism - a pressure plate with coil springs and release levers - a complete diaphragm spring clutch with flywheel - two flexible clutch disks with torsional-vibration damping linings: synthetic fibres and sintered metal - a clutch disk prepared for the demonstration of the torsional-vibration damping; clutch release bearing and release lever	Order No. 1166 Clutch master cylinder and slave cylinder Function and interaction of the master cylinder and slave cylinder of a hydraulically-operated clutch. - function of the bleeding of the unit
Order No. 1002 Four-speed transmission with locking synchronization - the transmission is cut wide open at the front and back - all gears can be shifted
Order No. 1089 Five-speed transmission with differential Demonstration: - shifting all gears - Synchromesh - Function of differential
Order No. 1132 Four-speed-transmission (VW Golf) Demonstration: - shifting of all gears - synchromesh - function of differential gear front and rear parts widely cut open
Order No. 1054 Four-speed transmission with differential Possible demonstrations: - shifting all gears - function of a differential gear - synchronization	Order No. 1121 Transfer case - power flow and power distribution in the transfer case - shifting of the off-road gear and road gear - function of the differential in the transfer case - differential lockup
Order No. 1133 Five-speed front transmission (VW Golf) - layout of the entire transmission front, upper part and rear widely cut open - smooth shifting of all gears	- function of the spur-gear differential - function of the synchromesh
Order No. 1199 Modern five-speed front transmission with differential (Daimler Benz A Class) Flow of power from the drive shaft to the output shaft and differential. Very smooth shifting of all gears.	Locking device to prevent the selection of reverse gear from fifth gear. Control of the hydraulic clutch mechanism.
Order No. 1055 Four-speed transmission, suited for the technology lab. Functions: - shifting all gears - synchronization	- measuring the torque in all the gears - measuring and calculation of the gear-ratios in all gears using a graded scale
Order No. 1285 Clutch actuator An electric motor drives a segment of a worm wheel via a worm. The worm wheel presses the release pin forwards, thus separating the flow of power in the clutch. The large tensioning forces to separate the clutch are taken over by a fine spring, which means that the electric motor only supplies the torque to overcome the friction. A button can be used to turn the electric motor and to demonstrate the release process. The installed pane of plexiglas means that everything can be seen easily.
Order No. 1255 Cutaway model: Daimler Benz 6-gear transmission This new construction is an equal-axle three-shaft transmission with 6 forward and one synchronised reverse gear. The shift elements are distributed on 2 shafts. Operation of the clutch is done automatically via central disengaging gear. The transmission can easily be turned neutral. All the gears can be shifted and the flow of force shown.
Order No. 1282 Automatic sequential six-gear transmission (DB) The automated, sequential six-gear transmission developed from the classical six-gear manual transmission is controlled by the engine management. With the help of a hydraulic piston, 2 gears can be shifted on each shift level. To change to another shift level, a gate sleeve, which had been able to rotate loosely up to then, is arrested by a second hydraulic piston. In this way, the old gear is firstly removed and then the selector shaft turned onto a different shift level by a pin in the arrested gate sleeve when the inlet selector shaft is displaced by the first hydraulic piston. Now, shifting into the next gear is possible. The installation of a gearshift rod with a button and a mechanical clamping lever means that all the gears can be shifted and the function of the hydraulic controls demonstrated. The following are cut away: transmission housing front and back, hydraulic pump with electric engine, hydraulic unit and the hydraulic pressure accumulator.
Order No. 1238 SMART gearbox The new construction from the firm of GRETAG is a mechanical shift gear with 6 forward and one reverse gear. The shifting of the gearbox is done by an electric motor via a gear wheel transmission onto a gear selector drum. The slide shoes of the gearshift rods engage into the groove tracks of the gear selector drum. For the differential, 2 differing transmission ratios can be shifted, which means that 6 forward gears result from the 3 forward gears of the main shaft. In shifting, an automatic clutch actuator takes over the clutch engagement and de-clutching. The gearbox is supplied as a semi-automatic or fully automatic gearbox. All the gears can be shifted by turning the electric motor. The function of the differential is also easily visible.
Order No. 1169 Transmission technology Function of the drive shaft, main shaft, countershaft and the reverse gear. interaction of the individual shafts.	Shifting of all gears, power distribution. Calculation of the different transmission ratios.
Order No. 1248 Transmission technique: 5-gear transmission Function of the drive shaft, main shaft countershaft and the reverse gear wheel set-up of a 5-gear transmission pushing together of the individual shafts.	Switching of all the gears. Calculating of the gear ratios in all gears. Extensive operating instructions with worksheets for pupils and teachers.
Order No. 1273 Functional model: Transmission technology, five-gear front transmission Design of a two-shaft transmission for vehicles with front-wheel drive. Pushing together of the transmission shafts. Shifting of all gears, observation of flow of force in the individual gears. Reading and calculation of the various transmissions.
Order No. 1278 Transmission technique: six-gear transmission - Set-up of a equal-axle three-shaft transmission - Pushing together and separation of the shafts - Insertion of the reverse pinion - Shifting the 6 forward gears and the reverse gear - Reading and calculation of the various ratios
Order No. 1212 Five-speed transmission assembly model This assembly model is well-suited to pupils own use. Without a puller and press the transmission can be taken apart and reassembled. The following can be learnt from it: Various synchromesh mechanisms, shifting locks and shifting catches.	the shifting of all gears including reverse gear, the function of the gearshift rods and the gearshift forks.
Order No. 1101 Assembly of a Borg-Warner synchromesh Main shaft stub, mounted on stands, for dismantling and assembly of two gears, including tool. A synchronising unit was prepared so that it can be assembled without puller and press. Particularly suitable for producing a work schedule.	The gears can be shifted easily.
Order No. 1102 Assembly of a Porsche synchromesh Main shaft stub, mounted on stands, for dismantling and assembly of two gears, including tool. A synchronising unit was prepared so that it can be assembled without puller and press. Particularly suitable for producing a work schedule.	The gears can be shifted easily.
Order No. 1100 Assembly of a complete main shaft A complete main shaft with drive shaft has been prepared so that it can be dismantled and assembled without press and puller.	The tool is supplied. The correct assembly can be checked with the aid of the countershaft. The gears can be shifted easily.
Order No. 1147 Students assembly set, main shafts includes the following: 5 main shafts - different makes (Daimler Benz, Opel, Ford, VW). Functions as described above.
Order No. 1148 Students assembly set, Borg Warner synchromesh includes the following: 5 different main shaft stubs, i.e. main transmission shafts of vehicles with front wheel drive. (Opel, VW, Ford) Functions as described above.
Order No. 1218 Variable- speed transmission model case Four-speed transmission with drive shaft, main shaft and countershaft for rear-wheel drive (equal-axle transmission) All components are clearly visible and arranged in the correct order: shafts, gear wheels, synchronizer body, sliding sleeves, synchronizer rings, sliding blocks, springs and bearings. Everything has been prepared so that the shafts can easily be put together.	Order No. 1219 Variable- speed transmission model case II Four-speed transmission with drive shaft and output shaft for front-wheel drive (unequal-axle transmission) All components are clearly visible and arranged in the correct order: shafts, gear wheels, synchronizer body, sliding sleeves, synchronizer rings, sliding blocks, springs and bearings. Everything has been prepared so that the shafts can easily be put together.
Order No. 1220 Variable- speed transmission model case III Four-speed transmission with drive shaft and output shaft for front-wheel drive (unequal-axle transmission) All components are clearly visible and arranged in the correct order: shafts, gear wheels, synchronizer body, sliding sleeves, synchronizer rings, sliding blocks, springs and bearings. Everything has been prepared so that the shafts can easily be put together.
Order No. 1090 Five-speed automatic transmission, electronically controlled, with torque converter and torque converter lock-up clutch (ZF) Parts cut in this model: - front and rear housing - torque converter with lock-up clutch - all couplings - internally-geared wheels for planetary gear sets - crescent-type pump and brake band - shift valve housing with all valves and pistons - actuating piston for brake band
Order No. 1127 Electronically controlled five-speed transmission (Daimler Benz) A newly developed automatic transmission form Daimler Benz. Parts cut in this model: housing, converter, converter lock-up clutch, oil pump, all clutches, all 3 planetary gear trains, hydraulic unit. The model allows for demonstration of the following: - function of the converter - function of the converter lock-up clutch - function of the freewheels - function of the oil pump - function of the parking interlock - function of the clutches and planetary gear trains - function of the solenoid valves and hydraulic unit - switching of the main control piston via the selector lever
Order No. 1283 Six-gear automatic transmission and converter with shorting (ZF) A transmission with superlatives, a latest-generation transmission. The housing has been cut away to a large extent. In addition, all the clutches with hydraulic pistons, the planetary gear trains, the crescent pump, the converter with shorting and the hydraulic control device with the solenoid valves. The transmission can be cranked easily.

	Order No. 1260 Cutaway model: Five-gear front automatic transmission DB A Class without torque converter The transmissions in the individual gear steps are not implemented with planetary gear trains, but with spur gears. The shifting processes are initiated electronically, with the gears being shifted by hydraulic clutches via the electro-hydraulic control unit. A very extensive description of the function is supplied.
	Order No. 1261 Cutaway model: Five-gear front automatic transmission DB A Class with torque converter The transmissions in the individual gear steps are not implemented with planetary gear trains, but with spur gears. The shifting processes are initiated electronically, with the gears being shifted by hydraulic clutches via the electro-hydraulic control unit. In the cutaway torque converter, one sees the pump and turbine wheel, the freewheel and the converter lockup clutch. A very extensive description of the function is supplied.
Order No. 1223 Five-speed automatic transmission for front- wheel drive (ZF) electronically controlled This transmission designed for high performance has the following parts cut away: Torque converter with lock-up clutch, all hydraulic couplings, planetary gear trains, transmission wheels and intermediate gear drive shaft with pinion, differential and hydraulic control. The transmission can easily be turned.
Order No. 1222 Four-speed automatic transmission for front- wheel drive (ZF) electronically controlled The cut away parts are: Torque converter with lock-up clutch, all hydraulic couplings, planetary gear trains,differential and hydraulic control. The transmission can easily be turned.
	Order No. 1198 CVT automatic transmission with sliding articulated band The complete power flow within the CVT automatic transmission can be observed: Input shaft, planetary gear with hydraulic clutch mechanism, primary and secondary conical disk with hydraulic piston, idler gear and differential. Speed change by movement of the conical disks. Hydraulic control of the CVT automatic transmission.
Order No. 1158 Torque Converter - function of the input and output rotors - function of the stator with functioning free wheel	Order No. 1159 Torque Converter with lock-up clutch - function of the input and output rotors - function of the stator with functioning free wheel - function of the lockup clutch by a disk system and a hydraulic piston
Order No. 1193 Torque Converter with lock-up clutch (ZF) - function of the impeller and turbine - function of the stator with functioning free wheeling - function of the lockup clutch, consisting of a steel clutch disc with friction lining, which is hydraulically pressed on the impeller	Order No. 1164 Simple planetary gear train Function of a simple planetary gear train with ring gear, sun wheel, planet carrier with planetary wheels.
Order No. 1163 Planetary gear train - Simpson gear set interaction of the components of the planetary gear train. - function of the two simple planetary gear trains with coupled sun wheels	Order No. 1162 Planetary gear train - Ravigneaux gear set Interaction of the components of the planetary gear train. Ring gear, 2 sun wheels and planet carrier with 3 narrow and 3 wide planetary wheels are easily recognised through the Plexiglas screen.
Order No. 1161 Automatic transmission components model case Contains the most important automatic transmission components (some parts cut open). Hydraulic control with shift valve, centrifugal governor, freewheel, internal gear pump, complete planetary gear train (easily dismantled), brake band 2 hydraulic couplings, park position with ratchet, disk set.	Order No. 1156 Planetary gear train assembly set -Dismantling of the planetary gear train - Assembly of the Planetary gear train - Assembly diagram supplied - Shifting of the different gears - Calculation of the transmission ratios
Order No. 1294 Electronically controlled shift-valve body of an automatic transmission This model gives an insight into the complicated interior of a modern shift valve body. In the cutaway housing, one sees the control plunger and control springs. An electro-solenoid valve has also bee cutaway so that its interior can be studied.
Order No. 1049 Differential gear with hypoid gearing Possible demonstrations: - function of the final drive (bevel pinion and crown wheel) - function of the differential bevel gears when driving in a straight line and when cornering - functions of the differential bevel gears when one wheel spins while the other stands still	Order No. 1092 Differential with lock (ASR, ASD) Demonstrations: - function of axle drive (pinion, crown wheel) - function of differential spider gears - locking by hydraulic piston and multiple-disk
Order No. 1201 Rear-wheel drive with disk locking system Demonstrations: - function of the axle drive (bevel gear - differential ring gear) - function of the differential when cornering - function of the locking mechanism in the case of wheel spin - function of the thrust rings and friction disks	Order No. 1046 Limited-slip differential with multi-disk clutches (ZF) Possible demonstrations: - different speeds of axle shafts when cornering - function of the friction plates - function of the thrust rings - locking
Order No. 1129 Differential with mechanical lock - function of the wheel-drive assembly (bevel gear, differential ring gear) - function of the differential gear - compensation of differential travels without locking - differential lock by shifting a claw-coupling over the locking lever	Order No. 1136 Model case, differential All components of the differential are closely visible, they are mounted on a board and are easy to remove.
Order No. 1043 TORSEN differential gear Possible demonstrations: - function of the worm gears and spur gears - different speeds of axle shafts when cornering - locking
Order No. 1272 Cutaway model: Torsen intermediate axle differential Intermediate axle differentials are fitted in vehicles with four-wheel drive. They permit a balance between the front and the rear axle and automatically block if the wheels of one axle spin. They can be installed directly on the transmission outlet for the rear axle.	Order No. 1286 Measurement device to measure the locking figure of differentials The differential used is a Torsen centre differential from an Audi Quattro. Drive shafts have been installed in both outlets of the differential and provided with lever arms at their ends. The levers are held by an infinitely adjustable balance. If the differential housing is turned with the help of a rotary lever, the levers of the axle shafts contact the lever arms of the balance. Depending on the setting of the lever arms on the balance, the differential blocks until the balance has been adjusted in such a way that the differential slips lever arms. The locking figure of the differential can be determined immediately by reading off the lever arms (law of levers!).
Order No. 1146 Students assembly set, differential includes the following: - 2 differential gears with ring gear - 3 differential gears with spur pinion - Extremely easy to put together and take apart (no pushing or pulling)
Order No. 1105 Assembly of differential gear with crown wheel The housing has been prepared so that simple assembly and dismantling is assured.
Order No. 1106 Assembly of differential with spur gear The housing has been prepared so that simple assembly and dismantling is assured.
Order No. 1241 Haldex Clutch - Parts cut in this model: solenoid switch, housing and windings - armature can be rotated and solenoids switch actuated - engaging the starter pinion can be demonstrated

Order No. 1052 Ball-and-nut power steering All demonstrations same as Order No.1050 Plus: - displacement of the valve pistons - function of working piston
Order No. 1050 Recirculating-ball steering (ball-and-nut steering gear) Possible demonstrations: - steering gear in motion - transmission ratio of gear set - self locking - the balls roll in opened guide tubes - rolling instead of sliding friction - calculation of transmission ratio and pivoting of the pitman arm	Order No. 1120 Finger steering - turning of the steering spindle - Stroke of the finger in the screw - torsion of the steering column stalk - play adjustment
Order No. 1051 Worm and roller steering gear possible demonstrations: - steering gear in motion - transmission ratio of the gear set - interaction of roller and worm - rolling instead of sliding friction - calculation of transmission ratio and pivoting of pitman arm	Order No. 1098 Steering gear test 4 similar or different steering gears prepared for dismantling and assembly Board-mounted tuition unit
Order No. 1142 Variable rack-and-pinion steering - movement sequence in steering gear - variable transmission ratio via different types of toothing in the gear rack - function of the thrust piece with spring: The gear rack is pressed against the pinion thus compensating play and different tooth width.	Order No. 1053 Rack and pinion steering gear Possible demonstrations: - Movement cycle of steering gear - steering gear ratio - function of thrust block with cup springs: The rack constantly pressed against the pinion, Therefore no backlash
Order No. 1228 Rack-and-pinion power steering II Sequence of movement in the steering gear. Transmission ratio in the steering system. Function of the thrust piece and the working piston. Change-over of the working piston by means of valve piston and internal ducts. Lateral drive of the steering tie rods on one side of the steering rack.	Order No. 1229 Rack-and-pinion power steering III Sequence of movement in the steering gear. Transmission ratio in the steering system. Function of the thrust piece and the working piston. Change-over of the working piston by means of rotary-disk valve. Lateral drive of the steering tie rods on both sides of the steering rack by means of ball knobs.
Order No. 1202 Complete suspension strut with wishbone, drive shaft, disk brake with brake disk - Function of the suspension strut with spring and cutaway shock absorber - Function of the disk brake with cutaway brake caliper - Function of the wishbone and the drive shaft with cutaway ball-and-socket joint
Order No. 1246 Spring leg (air suspension) In the Daimler Benz S class, 4 spring legs are used on the front and rear axle as function elements of the Airmatic. They are connected with one another via a data bus. The following can be clearly seen on the model: Air suspension with inlet valve for level control and lowering of the chassis, damper with bottom valve and gas area, solenoid valves for the regulation of the damping strength.
Order No. 1275 Cutaway model: ABC (active body control) suspension strut Active suspension and attenuation system with hydraulic cylinder, helical spring and attenuator. Behind the cutaway spring, the hydraulic cylinder (plunger) for level regulation, the attenuator and, in the hollow piston rod, the suspension strut control device are easily visible. Functions in the vehicle: The level regulation enables manual and speed-dependent automatic lowering and raising of the level of the vehicle. In bends and on uneven roads as well as in braking and accelerating, rolling and pitching motions are practically completely suppressed.
Order No. 1270 Functional model: Wheel camber A wheel at an angle no longer moves on a straight line, but on a circular track. If the wheels are pushed forwards, the wheels make efforts to move apart at the front as a result of the rolling taper.	Thanks to a precisely coordinated selection of the track, the wheel moves straight ahead and the wheel flutter is prevented.
Order No. 1225 Porsche Weissach axle (928) This axle comes complete with: Axle bracket, double wishbone, axle shafts, internally-ventilated brake disks, four-piston disk brakes, springs and shock absorbers. The compression of the axle can be clearly demonstrated. On request the axle can be supplied with a cutaway Original Porsche five-speed transmission.
Order No. 1224 Daimler Benz multi-link suspension The construction of the axle with its 5 links is easily distinguished by the use of colour markings. The axle is complete with brake calipers, brake disks, axle shafts, springs and shock absorbers. The compression can be clearly demonstrated. The differential and one brake drum for the parking brake are cut away.

Order No. 1234 Twin-tube shock absorber The shock absorber is cut away to such an extent that the inside and outside of the tube with bottom valve and piston can clearly be seen. The piston and the bottom valve are also cut away, so that the valves can clearly be seen. The piston rods can easily be moved in and out.	Order No. 1235 Single-tube gas-pressure shock absorber The shock absorber is cut away to such an extent that the separating piston and the working piston can clearly be seen inside the tube. The working piston is also cut away, so that the valves can clearly be seen. The piston rod can easily be moved in and out.
Order No. 1213 Axle shaft model case including joints cutaway ball-and-socket joint with wide angle of movement. cutaway tripod joint with length compensation. Cardan shaft with 2 universal joints and cutaway sliding section which is easily moved. Universal joint with polygonal rubber joint. Hardy disk (disk-type flexible coupling).
Order No. 1262 Cutaway model: Ball and socket joint Design of a ball and socket joint (constant-velocity or homo kinetic joint) Function of the balls and the ball cage. The axle journal can be pivoted, but only be moved up and down minimally.	Order No. 1263 Cutaway model: Tropoid joint Design of a tropoid joint with tropoid star with pinions and idlers. Tropoid joints permit diffraction angles of up to 20 degrees and 30mm axial displacement. This can be demonstrated very clearly on the model.
Order No. 1011 Balancing model for wheels - the wheel axle, which hangs on two chains, is pulled down by springs - demonstration of a static unbalance: wheel hops. This can be adjusted by putting on a counterweight - demonstration of dynamic unbalance: Wheel flutters. This can be adjusted by changing weights to the correct side