JPH03260438A - Transmission of electromagnetic type - Google Patents

Abstract

PURPOSE:To have smooth shift of gearing with simple operation by energizing either of a plurality of coils through a cable in conformity to the sensing signals of a rotation sensor, car speed sensor, and shift lever sensor, and by furnishing a controller which couples the specified follower gear with the main shaft. CONSTITUTION:When the driver turns a shift lever 36 into the desired position while the car is going to start or during shift operation, current flows through a cable 19 to that coil which is selected by a controller 21 in conformity to the sensing signals of sensors. This magnetizes the soft magnetic powder, which is confined between follower parts 51-55 mating with this coil and the main shaft 12, and also the soft magnetic steel around the powder. Thereby the follower gears 51-55 can be coupled with the main shaft 12 smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission in which a magnetic particle type electromagnetic clutch is provided between a main shaft and a plurality of driven gears.

[Prior Art] Conventionally, in a vehicle using a synchromesh type transmission, a clutch is provided between the input shaft and the crankshaft. When changing the speed of this transmission, the clutch is first disengaged, the main shaft is synchronized with a desired driven gear using a synchro ring, and the clutch is connected after the driven gear and the main shaft are coupled.

To perform the above-mentioned gear change, the driver operates a shift lever and a clutch pedal provided at the driver's seat. This shift operation is completed by shifting the shift lever to a desired position with the clutch pedal depressed and gradually returning the clutch pedal.

[Problems to be Solved by the Invention] However, since the above-mentioned transmission disengages the clutch once when changing gears, the transmission of torque from the crankshaft to the main shaft is interrupted, which may cause the vehicle to run in an unstable state. there were. In addition, since the above-mentioned transmission is somewhat cumbersome to change gears, there is a problem in that it takes some time to accelerate the vehicle. Furthermore, if you are a driver or a beginner who is not accustomed to shifting gears,
If the vehicle suddenly starts or stalls when changing gears,
In addition, problems such as gear shift shock and gear squeal often occurred.

An object of the present invention is to provide an electromagnetic clutch type transmission that can always run a vehicle in a stable state by eliminating torque interruption during gear shifting and can smoothly shift gears with a simple gear shifting operation. be.

[Means for Solving the Problems] The present invention provides an input shaft to which a drive gear is fixed, and a main shaft provided on the same axis as the input shaft and to which a plurality of driven gears are rotatably attached via bearings. and a counter shaft that is provided parallel to the main shaft and has a counter gear that meshes with the drive gear and a plurality of transmission gears that mesh with the driven gear, respectively, and a vehicle speed sensor that detects the rotational speed of the main shaft. This is an improvement to the transmission.

Its characteristic configuration includes: a rotation sensor that detects the rotational speed of the input shaft; a shift lever sensor that detects each operation position of the shift lever for performing a gear change operation of the transmission; a plurality of excitation coils respectively provided on the main shaft or the plurality of driven gears facing the soft magnetic powder; and a plurality of exciting coils provided on the main shaft end or the plurality of driven gears. a cable connecting the slip ring and the excitation coil; and excitation of one of the plurality of excitation coils via the cable based on detection signals from the rotation sensor, the vehicle speed sensor, and the shift lever sensor. and a controller for coupling the predetermined driven gear to the main shaft.

Preferably, in the transmission of the present invention, the input shaft thereof is directly connected to the crankshaft of the engine, and the controller variably controls the magnetic force of the excitation coil according to the amount of operation of the shift lever.

[Function] When the driver operates the shift lever to the desired position when starting or changing gears of the vehicle, current flows to the excitation coil selected based on the detection signal of each sensor, which causes the excitation coil to Since the soft magnetic powder sealed between the driven gear and the main shaft and the surrounding soft magnetic steel are magnetized, the driven gear can be smoothly connected to the main shaft.

[Example] Next, an example of the present invention will be described in detail based on the drawings.

As shown in FIGS. 1 to 4, 10 is a transmission with 4 forward speeds and 1 reverse speed, and the transmission 10 has an input shaft 11 and a main shaft 12.
, counter shaft 13 , vehicle speed sensor 14 , rotation sensor 16 , shift lever sensor 17 , soft magnetic powder 18 , and cable 1
9 and a controller 21.

The front end of the input shaft 1 is directly connected to the rear end of a crankshaft (not shown). In addition, the rear part of the input axle load 1 is inserted into the upper part of the case 23, and the input axle load 1 protrudes into the case 23.
A drive gear 24 is fixed to the rear end of.

The main shaft 12 is made of non-magnetic steel and is attached to the case 23 via a ball bearing 26 on the same axis as the input shaft 11 . Further, an outer spline 12a is formed on the outer peripheral surface of the main shaft 12, and a small diameter hole 12b is formed in the axial direction of the shaft center and in the radial direction of the shaft center.

The outer spline 12a is made of soft magnetic steel with high residual magnetic flux density, low holding force, and small hysteresis loss, such as five sleeves 31 formed of non-magnetic steel and provided with inner splines that mesh with the outer spline 12a. 5 provided with an inner spline that is formed to mesh with the outer spline 12a.
The sets of excitation coil holders 41 are inserted alternately. Five driven gears 51 to 55 made of non-magnetic steel are rotatably attached to the sleeve 31 via needle bearings 27, respectively. Further, as shown in detail in FIG. 1, the five driven gears 51 to 55 are, from the left, a fourth speed driven gear 54, a third speed driven gear 53, a second speed driven gear 52, a first speed driven gear 51, and a third speed driven gear 53. The reverse driven gear 55 is attached in this order.

The counter shaft 13 is attached to the lower part of the case 23 via a ball bearing 28 parallel to the main shaft 12. The counter shaft 13 includes a counter gear 29 that meshes with a drive gear 24, and a forward gear 29 that meshes with a drive gear 24.
Four transmission gears 61 to 64 that mesh with the four driven gears 51 to 54 for stages are fixed, respectively. Further, the reverse driven gear 55 meshes with a speed change gear (not shown) fixed to the counter shaft 13 via an intermediate gear 65 fixed to an intermediate shaft (not shown).

The vehicle speed sensor 14 is a pulser 1 fixed to the rear of the main shaft 12.
4a, and detects the rotational speed of the main shaft 12. The rotation sensor 16 is provided opposite to the pulser lla fixed to the rear of the input shaft 11, and detects the rotation speed of the input shaft 11. The shift lever sensor 17 is provided near the shift lever 36 at the driver's seat, and detects each operating position of the shift lever 36. Further, as shown in detail in FIGS. 3 and 4, the shift lever 36 includes a potentiometer 37 that outputs a voltage signal corresponding to the amount of operation of the shift lever 36 to a controller 21, which will be described later. When the driver operates the shift lever 36, the movable contact 38, which is fixed to the center of the shift lever 36 via an insulating material (not shown) and electrically connected to the controller 21, moves to the edge of each shift groove 39. A resistor 40 is attached to the resistor 40, whose neutral position side is grounded, and a voltage of +V volts is applied to the shift end side.
to slide. When the shift lever 36 is inserted shallowly into the shift groove 39, a low voltage signal is output to the controller 21, and as the shift lever 36 is inserted deeply, a high voltage signal is output to the controller 21.

The soft magnetic powder 18 is powdered soft magnetic steel, and two oil seals are attached to both ends of the gap formed between the excitation coil holder 41 and the soft magnetic ring 71 surrounding the outer periphery of this holder 41. Enclosed by 47. The soft magnetic ring 71 is made of soft magnetic steel, and the driven gear 51
It is fixed to the side surface of ~55 by a bolt 48.

The excitation coil 91 is housed in a ring-shaped groove formed in a pair of excitation coil holders 41 at mutually opposing positions.

The cable 19 connects five slip rings 81 attached near the front end of the main shaft 12 and five excitation coils 91 through small diameter holes 12a made in the main shaft 12, respectively.

The controller 21 has an input interface 56 and a CPU 5.
7, a ROM 58, and an output interface 60.

Detection signals from the vehicle speed sensor 14, rotation sensor 16, shift lever sensor 17, and potentiometer 37 are sent to the CPU via the human interface 56 of the controller 21.
Guided by 57. A ROM 58 is connected to the CPU 57 . This ROM 58 contains selection conditions for the driven gears 51 to 55 according to the rotational speed of the main shaft 12, the rotational speed of the input shaft 1, the operating position of the shift lever 36, and the operating amount of the shift lever 36, as well as coupling conditions to the main shaft 12. Data for optimizing is stored.

CPU 57 is connected to drive circuit 70 via output interface 6o. The drive circuit 7o amplifies the control current of the controller 21 and sends it to the excitation coil 91 via the brush 46, the slip ring 81 and the cable 19, and the excitation coil holder 41, the soft magnetic powder 18 and the soft magnetic ring 7.
1.

The operation of the electromagnetic clutch type transmission configured in this way will be explained.

First, when starting the vehicle, the driver puts the shift lever 36 into the shift groove 39 at the first gear position shown in FIG. 3.

At this time, as the shift lever 36 is pushed deeper into the shift groove 39, the potentiometer 37 shown in FIGS. 3 and 4 sends out a gradually higher voltage signal to the controller 21. The controller 21 controls the drive circuit 7 based on this signal.
0, and the excitation coil 91 of the first speed driven gear 51 is gradually excited. The excitation coil holder 41 made of soft magnetic steel, the soft magnetic powder 18, and the soft magnetic ring 71 surrounding the excitation coil 91 are gradually magnetized.

The soft magnetic powder 18 gradually joins the excitation coil holder 41 and the soft magnetic ring 71, which have been rotating relative to each other, with some sliding. That is, the first speed driven gear 51 is smoothly coupled to the main shaft 12.

Next, when shifting from the first speed driven gear 51 to the second speed driven gear 52, the shift lever 36 is moved from the first speed position to the shift groove 39 at the second speed position.

At this time, move the shift lever 36 to the shift groove 3 in the first gear position.
Even if the CPU 57 is completely removed from the sensor 9, the CPU 57
6. Compare the detection signal of 17 with the data stored in the ROM 58, and find that the soft magnetic powder 18 has coupled the excitation coil holder 41 and the soft magnetic ring 71 with some slippage, that is, the first speed driven gear 51 is half-clutched. Outputs a signal that maintains the state.

When the shift lever sensor 17 is moved to the center of the shift groove 39 in the second gear position, that is, when the second gear driven gear 52 is in the half-clutched state, the first gear driven gear 51 is released from the half-clutched state. . Furthermore, when the shift lever 36 is inserted deeply, the second speed driven gear 52 is completely coupled to the main shaft 12.

Furthermore, when shifting from the second speed driven gear 52 to the third speed driven gear 53, or from the third speed driven gear 53 to the fourth speed driven gear 5.
4, the shift from the first driven gear 51 to the second
Since the operation is the same as when shifting to the speed driven gear 52, repeated explanation will be omitted.

FIG. 5 shows another embodiment of the invention.

In FIG. 5, 100 is added to the numbers of components corresponding to those in FIG. 1, respectively.

The characteristic configuration of this embodiment is that an annular excitation coil holder 141 that has an excitation coil 191 built into the side surface of the driven gears 151 to 155 and is fixed by a bolt 148, and a spline 112a of the main shaft 112 with a gap formed on the inner circumference thereof. A soft magnetic ring 171 is fitted into the excitation coil holder 141 and the soft magnetic ring 171 is fitted into the excitation coil holder 141.
71 and is enclosed by two oil seals 147 attached to both ends of the gap.

Further, an excitation coil 1 is provided on the outer periphery of the excitation coil holder 141.
A slip ring 181 connected to 91 by a cable 119 is fixed. This slip ring 181 has a brush 146 inserted into a guide tube 196 and a spring 19.
Pressure is applied by 7. The guide tube 196 is fixed to the case 123, and the cable 198 connected to the brush 146 passes through the insulating cover 199 and is connected to the drive circuit 170.

The operation of this example is the same as that of the previous example, so a repeated explanation will be omitted.It should be noted that in the example, the crankshaft and input shaft were directly connected.
This is just an example, and a known clutch may be provided between the crankshaft and the input shaft. In this case, a potentiometer is not required.

[Effects of the Invention] As described above, according to the present invention, when the driver operates the shift lever to a desired position when starting the vehicle or changing gears, the controller is selected based on the detection signals of each sensor. The current to the excitation coil is controlled and the soft magnetic powder sealed between the driven gear facing the excitation coil and the main shaft and the surrounding soft magnetic steel are magnetized, allowing for smooth gear changes with simple gear shifting operations. I can do it. Furthermore, torque interruption during gear shifting is eliminated, allowing the vehicle to run in a stable state at all times.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional configuration diagram of an electromagnetic clutch type transmission according to an embodiment of the present invention. Figure 2 is a detailed view of section A in Figure 1. FIG. 3 is a plan view of the shift lever and potentiometer. FIG. 4 is a sectional view taken along line B-B in FIG. 3. FIG. 5 is a diagram corresponding to FIG. 2 showing another embodiment of the present invention. 10.110: Transmission, 11: Input shaft, 12.112: Main shaft, 13: Counter shaft, 14: Vehicle speed sensor, 16: Rotation sensor, 17: Shift lever sensor, 18.118: Soft magnetic powder, 19.119 : Cable, 21: Controller, 24: Drive gear, 27: Needle bearing, 29: Counter gear, 36: Shift lever 47, 147: Oil seal (seal member), 51.1
51: 1st speed driven gear, 52: 2nd speed driven gear, 53: 3rd speed driven gear, 54: 4th speed driven gear, 55: Reverse driven gear, 6E to 64: Shift gear, 81.181D Slip ring, 91.191: Excitation coil. Figure 2 Figure 2

Claims (1)

[Claims] 1) An input shaft to which a drive gear is fixed, a main shaft provided on the same axis as the input shaft and to which a plurality of driven gears are rotatably attached via bearings, and A transmission comprising: a counter shaft provided in parallel to which a counter gear meshing with the driving gear and a plurality of transmission gears meshing with the driven gear are respectively fixed; and a vehicle speed sensor detecting the rotational speed of the main shaft, A rotation sensor that detects the rotational speed of the input shaft, a shift lever sensor that detects each operation position of a shift lever for performing a gear change operation of the transmission, and a seal member between the main shaft and the driven gear. Enclosed soft magnetic powder; a plurality of excitation coils respectively provided on the main shaft or the plurality of driven gears facing the soft magnetic powder; a slip ring provided on the end of the main shaft or the driven gears and the excitation. a cable connecting the coil, and exciting one of the plurality of excitation coils via the cable based on detection signals from the rotation sensor, the vehicle speed sensor, and the shift lever sensor to drive the predetermined driven gear. An electromagnetic clutch type transmission comprising: a controller coupled to the main shaft. 2) The electromagnetic clutch type transmission according to claim 1, wherein the input shaft is directly connected to the crankshaft of the engine, and the controller variably controls the magnetic force of the excitation coil according to the amount of operation of the shift lever.