JP2002286132A - Shift assist device for transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shift assist device for transmission using a shift actuator not constituting a resistance for the operation of a shift lever when the drive is stopped, whereby it is possible to smoothly assist the shifting operation by the shift lever by putting on the shift actuator only in the range the shift assist is desired. SOLUTION: The shift assist device for a transmission is configured so that a shift mechanism coupled with the shift lever for operating a synchronizing device of the transmission is operated in the same direction as the shift operation direction of the shift lever and includes the shift actuator which does not constitute any resistance for the operation of the shift lever when the drive is stopped, whereby the shift actuator is put on at least in the synchronized range belonging to the shift stroke range of the shift mechanism when the gear-in motion is made, and in the gear-out motion, the shift actuator is put on in the meshing range of at least a clutch sleeve of the synchronizing device with a dog tooth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shift assist device for reducing a shift operation force in a shift operation of a transmission mounted on a vehicle.

[0002]

2. Description of the Related Art Large trucks and buses having a large shift operation force during a shift operation are provided with a shift assist device for reducing the shift operation force. Compressed air is generally used as an operation source of a shift assist device provided in such a large vehicle. A shift assist device that uses compressed air as an operation source includes a shift actuator including a pneumatic cylinder that operates a shift operation mechanism connected to a shift lever in the same direction as the shift operation of the shift lever. However, since large vehicles generally use compressed air as a brake operation source, the compressed air can be used for the shift assist device.However, small and medium-sized vehicles are equipped with a compressor as a compressed air source. A shift assist device using a shift actuator composed of a pneumatic cylinder cannot be provided in a vehicle that does not have the shift assist device. However, in recent years, there has been an increasing demand for equipping small and medium vehicles with a shift assist device, and a shift assist device using an electric motor has been proposed.
No. 37 and Japanese Patent No. 2987121.

[0003]

In a shift operation by a shift lever, a range in which a shift actuator is most likely to be assisted by a shift is a synchronous range during a gear-in operation and a meshing range between a clutch sleeve and dog teeth during a gear-disengagement operation. . However, in order to perform a smooth shift operation, it is necessary to drive the shift actuator in accordance with the operation speed of the shift lever by the driver. That is, a shift actuator using an electric motor requires a reduction mechanism including a ball screw mechanism and a gear mechanism in order to obtain a predetermined operating force, and when this reduction mechanism turns off the electric motor, resistance to shift lever operation is generated. . Therefore, when the shift actuator using the electric motor is applied to the shift assist device, the shift actuator is driven in accordance with the operation speed of the shift lever by the driver even in a range where the shift assist is unnecessary. However, the operating speed of the shift lever varies from driver to driver, and it is substantially difficult to drive the shift actuator in accordance with the operating speed of the shift lever.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and its main technical problem is to use a shift actuator which does not cause resistance to the operation of a shift lever when driving is stopped, and only to the extent that a shift assist is desired. It is an object of the present invention to provide a shift assist device for a transmission that can smoothly assist a shift operation by a shift lever by driving a shift actuator.

[0005]

According to the present invention, in order to solve the above-mentioned main technical problems, a shift mechanism which is connected to a shift lever and operates a synchronizing device of a transmission is provided by a shift operation of the shift lever. A shift assist device for a transmission for operating in the same direction as a direction, comprising: a shift plunger engaged with an operating member connected to the shift mechanism;
The movable plunger includes a magnet movable body disposed on an outer peripheral surface of the shift plunger, a cylindrical fixed yoke surrounding the magnet movable body, and a coil disposed inside the fixed yoke. A shift actuator, a shift stroke sensor that detects a shift stroke position of the shift mechanism,
A controller that outputs a control signal to the coil of the shift actuator based on the detection signal of the shift stroke sensor, the controller comprising: A shift assist device for a transmission is provided which supplies power to the coil at least in a meshing range between the clutch sleeve and the dog teeth of the synchronizer during a gear disengagement operation.

The controller sets the electric power supplied to the coil in the meshing range between the clutch sleeve and the dog teeth during the gear release operation to be smaller than the electric power supplied to the coil in the synchronous range during the gear-in operation.
Further, the controller supplies power to the coil at least during a shift-in range of the shift mechanism and an engagement range between a chamfer of a clutch sleeve and a chamfer of a dog tooth of the synchronizer during a gear-in operation. . The power supplied to the coil in the engagement range between the chamfer of the clutch sleeve and the chamfer of the dog teeth during the gear-in operation is set smaller than the power supplied to the coil in the synchronization range during the gear-in operation.

Further, according to the present invention, there is provided a shift mechanism connected to a shift lever for operating a transmission synchronizing device.
In a shift assist device for a transmission for operating the shift lever in the same direction as a shift operation direction, a first electromagnetic solenoid and a second electromagnetic solenoid that actuate operating members connected to the shift mechanism in opposite directions to each other. , A shift stroke sensor for detecting a shift stroke position of the shift mechanism, and the first electromagnetic solenoid or the second solenoid of the shift actuator based on a detection signal of the shift stroke sensor.
A controller that outputs a control signal to the electromagnetic solenoid of the shift mechanism, at least during a shift stroke range of the shift mechanism during a gear-in operation, and at least during a gear release operation, at least a clutch of the synchronization device. A shift assist device for a transmission is provided which supplies electric power to the first electromagnetic solenoid or the second electromagnetic solenoid in an engagement range between a sleeve and dog teeth.

The controller supplies the electric power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid in the meshing range between the clutch sleeve and the dog teeth at the time of the gear release operation to the first electromagnetic solenoid in the synchronization range at the time of the gear-in operation. Is set smaller than the electric power supplied to the electromagnetic solenoid or the second electromagnetic solenoid. Further, the controller, at the time of gear-in operation, at least a synchronization range in the shift stroke range of the shift mechanism,
An electric power is supplied to the first electromagnetic solenoid or the second electromagnetic solenoid for an engagement range between the chamfer of the clutch sleeve and the chamfer of the dog teeth of the synchronizer. The power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid in the engagement range between the chamfer of the clutch sleeve and the chamfer of the dog teeth during the gear-in operation is the first electromagnetic solenoid in the synchronization range during the gear-in operation. Alternatively, the power is set to be smaller than the power supplied to the second electromagnetic solenoid.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of a shift assist device for a transmission constructed in accordance with the present invention will be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram of a transmission mechanism provided with a shift assist device for a transmission configured according to the present invention. The transmission mechanism shown in FIG. 1 includes a transmission lever 3 for performing a transmission operation of a transmission 2 having a synchronization device, a shift mechanism 6 connected to the transmission lever 3,
Is provided in the same direction as the shift operation direction of the speed change lever 3.

As shown in FIG. 2, the transmission 2 has a gear mechanism with five forward gears and one reverse gear. The transmission 2 includes an input shaft 21, an output shaft 22 disposed on the same axis as the input shaft 21, and a counter shaft 23 disposed in parallel with the output shaft 22. A drive gear 241 (fifth speed gear in the illustrated embodiment) is mounted on the input shaft 21, and a fourth speed gear 242, a third speed gear 243, a second speed gear 244, a first speed gear 242 are mounted on the output shaft 22. A speed gear 245 and a reverse gear 246 are rotatably disposed. Also,
A fifth speed gear 241 and a fourth speed gear 242 are provided on the output shaft 22.
, And between the third speed gear 243 and the second speed gear 244, and between the first speed gear 245 and the reverse gear 246, respectively. On the other hand, the fifth speed gear 241, the fourth speed gear 242, the third speed gear 2
43, counter gears 261, 262, 263, 264 that always mesh with the second speed gear 244 and the first speed gear 245;
265 is provided, and the reverse gear 246 is provided.
And a counter gear 266 meshing via an idle gear (not shown).

Next, the synchronizers 25a, 25b and 25c will be described with reference to FIG. Since the illustrated synchronizing devices 25a, 25b and 25c have substantially the same configuration, the fifth speed gear 241 and the fourth speed gear 242
The synchronizer 25a disposed between them will be described.
The illustrated synchronizer 25a is a well-known key type synchronizer, and includes a clutch hub 251 mounted on the output shaft 22.
And a clutch sleeve 252 slidably fitted to an external spline provided on the outer periphery of the clutch hub 251.
And a plurality of (for example, three) keys 253 provided in a plurality of (for example, three) key grooves 251 a provided in the clutch hub 251 in a radial direction, and the keys 253 provided inside both ends of the key 253 are connected to the clutch 251. Key springs 254 and 254 pressing toward the sleeve 252 and a fifth speed gear 241
Dog teeth 241a and 242a provided on the fifth and fourth speed gears 242, respectively, and cone surfaces 241b provided on the fifth and fourth speed gears 241 and 242, respectively.
And synchronizer rings 255 and 256 respectively disposed on the synchronizer rings 255 and 256. The synchronizer 25a configured as described above is provided with the clutch sleeve 2
A shift fork 67 to be described later is fitted into an annular groove 252a provided on the outer periphery of the clutch 52, and the clutch sleeve 252 is slid leftward or rightward in the drawing by the shift fork 67 to thereby spline the clutch sleeve 252. 252b and the teeth of the synchronizer ring 255 and the dog teeth 241a or the synchronizer ring 256 and the dog teeth 242a. Since the illustrated synchronization device has a known configuration, further detailed description is omitted.

The above-mentioned synchronizers 25a, 25b and 2
5c is operated by the shift lever 3 and the shift mechanism 6 connected to the shift lever 3. Shift lever 3
Is configured to be tiltable about an axis (not shown) in a direction perpendicular to the plane of FIG. 1 (selection direction) and in a left-right direction (shift direction). The shift lever 3 is operated in accordance with a shift pattern shown in FIG. 4 to operate the synchronizers 25a, 25b and 25c. The shift knob switch 4 is disposed on the knob 31 of the shift lever 3. The shift knob switch 4 includes a first switch 41 (SWI) and a second switch 42 (SW2) for detecting the operating direction when the knob 31 of the shift lever 3 is tilted in the shift direction. For example, when the knob 31 of the shift lever 3 is tilted leftward in FIG. 1, the first switch 41 (SWI) is turned on.
When the shift lever 3 is tilted rightward in FIG.
The switch 42 (SW2) is turned on. When the shift knob switch 4 is released from the knob 31 of the transmission lever 3, the first switch 41 (SW1) is released.
The second switch 42 (SW2) is also turned off, and sends this ON / OFF signal to a controller described later. Since such a shift knob switch is a well-known technique as disclosed in, for example, Japanese Utility Model Application Laid-Open No. 56-97133, further detailed description will be omitted.

Next, the shift mechanism 6 which is connected to the shift lever 3 and operates the synchronizers 25a, 25b and 25c will be described with reference to FIGS.
The shift mechanism 6 includes a push-pull cable 61 having one end connected to the shift lever 3,
Control lever 62 with the other end and the middle part connected
A control rod 63 connected to one end of the control lever 62; and a shift lever 64 mounted on the control rod 63. The tip of the shift lever 64 is selectively engaged with a foot block 66 attached to a shift rod 65. A shift fork 67 is mounted on the shift rod 65, and the tip of the shift fork 67 is engaged with an annular groove 252a provided on the outer periphery of the clutch sleeve 252 of the synchronizer 25a. Although FIG. 5 shows only the shift rod 65 for switching between the fifth speed and the fourth speed as the shift rod, the shift mechanism 6 is provided with the synchronizer 25b.
And two other shift rods to operate 25c. Since the shift mechanism 6 has a well-known configuration, further detailed description will be omitted.

The illustrated embodiment includes a shift assist device 8 for operating the shift mechanism 6 in the same direction as the shift operation direction of the shift lever 3. The shift assist device 8 includes a shift actuator 80
Is provided. The shift actuator 80 will be described with reference to FIGS. The shift actuator 80 shown in FIG. 6 includes a cylindrical fixed yoke 81 functioning as a casing. This fixed yoke 81
It is formed of a magnetic material. A coil 82 (MC1) is mounted on the inner peripheral surface of the fixed yoke 81.
The coil 82 (MC1) is connected to a power supply circuit (not shown). The coil 82 (MC1)
Is appropriately set according to the operating stroke of the shift actuator 80.

In the cylindrical fixed yoke 81, a magnet movable body 83 is provided. The magnet movable body 83 is provided with a shift plunger 8 disposed at the center of the fixed yoke 81.
31, a movable yoke 832 mounted on the outer periphery of the shift plunger 831, and an annular permanent magnet 833 arranged on the outer peripheral surface of the movable yoke 832 so as to face the inner peripheral surface of the coil 82 (MC1). Is provided. The shift plunger 831 is made of a non-magnetic material such as stainless steel, and has a notch 831a formed at the left end in the figure, and the other end of the control lever 62 engages with the notch 831a. ing. The movable yoke 832 is made of a magnetic material, and has a cylindrical portion 832a on which a permanent magnet 833 is mounted, and annular flange portions 832b and 832c provided at both ends of the cylindrical portion 832a. The outer peripheral surfaces of the flange portions 832b and 832c are configured close to the inner peripheral surface of the fixed yoke 81. The gap between the outer peripheral surfaces of the flange portions 832b and 832c and the inner peripheral surface of the fixed yoke 81 is preferably as small as possible, but is set to 0.5 mm in the illustrated embodiment in consideration of manufacturing errors and the like. The movable yoke 832 thus configured is restricted from moving in the axial direction by snap rings 834 and 835 mounted on the shift plunger 831 disposed on both sides thereof. The permanent magnet 833 has magnetic poles on the outer peripheral surface and the inner peripheral surface. In the illustrated embodiment, the N pole is formed on the outer peripheral surface and the S pole is formed on the inner peripheral surface. The permanent magnet 833 thus formed is connected to the movable yoke 83
The cylindrical portion 832 of the movable yoke 832 is mounted on the outer peripheral surface of the second cylindrical portion 832a, and is disposed on both sides thereof.
The movement in the axial direction is restricted by the snap rings 836 and 837 attached to a.

End walls 84 and 85 are mounted on both sides of the fixed yoke 81, respectively. These end walls 84, 85
Are formed of a non-magnetic material such as stainless steel, an aluminum alloy, or an appropriate synthetic resin, and have a hole 84 through which the shift plunger 831 is inserted at the center.
1, 851 are provided. The shift plunger 831 provided through the holes 841 and 851
1, 851 are slidably supported in the axial direction by the inner peripheral surface. Notches 842 and 852 are formed in the outer inner peripheral portions of the end walls 84 and 85, respectively.
Seal members 86 and 87 are attached to 42 and 852, respectively.

The shift actuator 80 shown in FIG. 6 is constructed as described above.
This will be described with reference to FIG. In the shift actuator 80, as shown in FIGS. 7A and 7B, the first magnetic flux circuit 830a and the second magnetic flux circuit 830a by the permanent magnet 833 are used.
Is formed. That is, in the shift actuator 80 in the illustrated embodiment, the N pole of the permanent magnet 833, the coil 82 (MC1), the fixed yoke 81, the flange 832b of the movable yoke 832, and the movable yoke 8
32, a first magnetic circuit 830a passing through the S pole of the permanent magnet 833, the N pole of the permanent magnet 833, the coil 82 (MC1), the fixed yoke 81, and the movable yoke 832
Of the movable yoke 832,
A second magnetic circuit 830b passing through the south pole of the permanent magnet 833 is formed. In such a state, the coil 82 (M
When a current is applied to C1) in the first direction shown in FIG. 7A, a thrust is generated in the magnet movable body 83, that is, the shift plunger 831 in the leftward direction as shown by the arrow in FIG. Then, the control lever 62 is operated in the direction indicated by the arrow 62a to assist. On the other hand, coil 82 (MC1)
When a current flows in the second direction shown in FIG. 7B, a thrust is generated in the magnet movable body 83, that is, the shift plunger 831 in the right direction as shown by the arrow in FIG. The lever 62 is operated in the direction indicated by the arrow 62b to assist.

As described above, the shift actuator 80 in the embodiment shown in FIGS. 6 and 7 has a permanent magnet 833 as shown in FIGS. 7 (a) and 7 (b).
Flux circuit 830a and second flux circuit 8
30b is formed, and the inner peripheral surface of the fixed yoke 81 and the outer peripheral surfaces of the flange portions 832a and 832c of the movable yoke 832 are close to each other, so that only the coil 82 (MC1) has a large air gap against magnetic flux. . Therefore,
The shift actuator 80 in the illustrated embodiment includes:
The air gap in the magnetic flux circuit by the permanent magnet 833 can be made as small as possible, and a large thrust can be obtained.

Next, another embodiment of the shift actuator will be described with reference to FIGS. The shift actuator 80a shown in FIGS.
6, the same members as those in the embodiment of FIGS. 6 and 7 are denoted by the same reference numerals, and detailed description thereof will be omitted. Shift actuator 8 in the embodiment shown in FIGS. 8 and 9
Reference numeral 0a is substantially the same as the shift actuator 80 shown in FIGS. 6 and 7, except that the magnet movable body 83a is different from the shift actuator 80 shown in FIGS. Hereinafter, the magnet movable body 83a will be described.

The magnet movable body 8 in the embodiment shown in FIG.
3a is a shift plunger 831 disposed at the center of the fixed yoke 81, and an intermediate yoke 831a disposed on the outer peripheral surface of the shift plunger 831 so as to face the inner peripheral surface of the coil 82 (MC1). A pair of permanent magnets 832 respectively disposed on both sides of the intermediate yoke 831a
a, 833a and the pair of permanent magnets 832a, 833a
And a pair of movable yokes 834a and 837a respectively disposed outside in the axial direction. The intermediate yoke 831a is formed in an annular shape from a magnetic material. The pair of permanent magnets 832a and 833a have magnetic poles on both end faces in the axial direction. In the illustrated embodiment, N poles are formed on end faces facing each other, and S poles are formed on the axially outer end faces. I have. The pair of movable yokes 834a and 837a are formed of a magnetic material, respectively, and have cylindrical portions 835a and 838a, respectively.
35a and 838a have annular flanges 836a and 839a provided at axially outer ends, respectively.
The outer peripheral surfaces of 36a and 839a are configured close to the inner peripheral surface of the fixed yoke 81. Flanges 836a, 839a
The gap between the outer peripheral surface of the fixed yoke 81 and the inner peripheral surface of the fixed yoke 81 is set to 0.5 mm similarly to the shift actuator 80 in the embodiment shown in FIG. In the illustrated embodiment, the pair of movable yokes 834a and 837a are respectively cylindrical portions 835a and 838a and a flange portion 836.
a and 839a, but the outer peripheral surface may be constituted only by a flange portion which is close to the inner peripheral surface of the fixed yoke 81. The pair of movable yokes 834a and 837a configured as described above are axially moved by snap rings 834 and 835 mounted on the shift plunger 831 and disposed on the outside in the axial direction.

The shift actuator 80a in the embodiment shown in FIG. 8 is configured as described above, and its operation will be described below with reference to FIG. In the shift actuator 80a, as shown in FIGS. 9A and 9B, a pair of permanent magnets 832a and 833a
Flux circuit 830a and second flux circuit 8
30b is formed. That is, in the shift actuator 80a in the illustrated embodiment, the permanent magnet 832
N pole of a, intermediate yoke 831a, coil 82 (MC
1), fixed yoke 81, flange 83 of movable yoke 834a
6a, the first magnetic circuit 830a passing through the cylindrical portion 835a of the movable yoke 834a, the S pole of the permanent magnet 832a, the N pole of the permanent magnet 833a, the intermediate yoke 831a, and the coil 82
(MC1), a fixed yoke 81, a flange portion 839a of the movable yoke 837a, a cylindrical portion 838a of the movable yoke 837a, and a second magnetic circuit 630b passing through the S pole of the permanent magnet 833a. In such a state, the coil 82 (M
When a current is applied to C1) in the first direction shown in FIG. 9A, a thrust is generated in the magnet movable body 83a, that is, the shift plunger 831 in the leftward direction in FIG. Is actuated in the direction indicated by the arrow 62a to assist. On the other hand, when a current is applied to the coil 82 (MC1) in the second direction shown in FIG.
A thrust is generated in 3a, that is, the shift plunger 831 in the right direction in FIG. 9B, and the control lever 62 is operated in the direction indicated by the arrow 62b to assist.

As described above, in the shift actuator 80a in the embodiment shown in FIGS. 8 and 9, the pair of permanent magnets 832a and 833a are disposed with the intermediate yoke 831a interposed therebetween. Since the N poles are formed on the end faces facing each other, the magnetic fluxes emitted from the permanent magnets 832a and 833a go toward the coil 82 (MC1) while repelling each other. Accordingly, in the shift actuator 80a in the illustrated embodiment, since the magnetic flux passes through the coil 82 (MC1) orthogonally, the thrust generated in the pair of magnet movable bodies 83a, that is, the shift plunger 831 can be increased. Note that S poles may be formed on the end faces of the pair of permanent magnets 832a and 833a that face each other. That is, it is desirable that the end faces of the pair of permanent magnets 832a and 833a facing each other have the same polarity. Further, in the shift actuator 80a in the embodiment shown in FIG. 8, as shown in FIGS. 9A and 9B, a first magnetic flux circuit 830a including a pair of permanent magnets 832a and 833a.
And a second magnetic flux circuit 830b are formed, and the inner peripheral surface of the fixed yoke 81 and a pair of movable yoke yokes 834a and 834a are formed.
Since the outer peripheral surfaces of the flange portions 836a and 839a of 7a are arranged close to each other, only the coil 62 has a large air gap for magnetic flux. Therefore, in the shift actuator 80a in the embodiment shown in FIG. 8, the air gap in the magnetic flux circuit formed by the pair of permanent magnets 832a and 833a can be made as small as possible, and a large thrust can be obtained.

The shift assist device 8 in the illustrated embodiment has a shift stroke sensor 85 (SS) for detecting the shift stroke position of the shift mechanism. The shift stroke sensor 85 is connected to the control lever 62 via a rod 86 and a lever 87, and is composed of a potentiometer that detects a shift stroke position based on the operating angle of the control lever 62, and sends a detection signal to the controller 10.

The controller 10 is constituted by a microcomputer, and includes a central processing unit (CPU) 101 for performing arithmetic processing according to a control program, and a read-only memory (ROM) for storing a control program, a clutch connection speed control map described later, and the like. 102, a readable and writable random access memory (RAM) 103 for storing calculation results and the like, a timer (T) 104, an input interface 105 and an output interface 10
6 is provided. A first switch 41 (SWI) constituting the shift knob switch 4 is provided on the input interface 105 of the controller 10 thus configured.
And the detection signals of the second switch 42 (SW2) and the shift stroke sensor 85 (SS). Further, a detection signal of a clutch pedal switch 91 (SW3) that detects an operation state of a clutch pedal 9 that operates a clutch disposed between an engine (not shown) and the transmission 2 is input to the input interface 105. . The clutch pedal switch 91 (SW3) is OFF when the clutch pedal 9 is released, that is, not depressed (clutch contact state), and outputs an ON signal when the clutch pedal 9 is depressed to release the clutch. .
When an automatic clutch that automatically controls the connection and disconnection of the clutch based on signals from the shift knob switch 4 and the shift stroke sensor 85 (SS) is mounted, the amount of engagement of the clutch is replaced with the clutch pedal 9 described above. Is input to the input interface 105. On the other hand, the output interface 106 outputs a control signal to the coil 82 (MC1) of the shift actuator 80 (80a) and the like.

Next, the assist force corresponding to the shift stroke position will be described with reference to FIG. FIG. 10 shows the spline 252 of the clutch sleeve 252 described above.
b and the synchronizer ring 2 for the fifth speed gear 241
55 teeth 255a and dog teeth 241a, and teeth 256 of a synchronizer ring 256 for the fourth speed gear 242.
3 shows the positional relationship between the “a” and the dog tooth 242a in the neutral state. In the embodiment shown in FIG. 10, the shift stroke position of the clutch sleeve 252 in the neutral state is P7. From this neutral state, the clutch sleeve 252 is moved to the fifth speed gear 241 side (the left side in FIG. 10), and the shift stroke position (the gear-in position) at which the tooth 255a of the synchronizer ring 255 for the fifth speed gear 241 reaches the front end of the chamfer. (Synchronization start position at time) is P6, fifth speed gear 241
The shift stroke position at the position reaching the rear end of the chamfer of the teeth 255a of the synchronizer ring 255 (synchronization end position at the time of gear-in) is P5, and the shift stroke position at the position reaching the rear ends of the teeth 255a of the synchronizer ring 255 is P4. The shift stroke position at the position where the dog tooth 241a for the fifth speed gear 241 reaches the front end of the chamfer is P3, and the shift stroke position at the position where the dog tooth 241a reaches the rear end of the chamfer (the dog tooth 241a of the clutch sleeve 252 when the gear is disengaged). The shift stroke position at which the dog gear 241a reaches the rear end is defined as P1.

On the other hand, from the neutral state, the fourth speed gear 2
42 (to the right in FIG. 10).
2, the shift stroke position (synchronization start position at the time of gear-in) at the position where the teeth 256a of the synchronizer ring 256 for the fourth speed gear 242 reach the front end of the chamfer is P8, and the synchronizer ring for the fourth speed gear 242 is used. The shift stroke position (synchronization end position at the time of gear-in) at the position where the 256 teeth 256a reach the rear end of the chamfer is P9, and the teeth 2 of the synchronizer ring 256 are
The shift stroke position at the position reaching the rear end of 56a is P
10. The shift stroke position at the position where the dog tooth 242a for the fourth speed gear 242 reaches the front end of the chamfer is P1.
1. The shift stroke position of the position where the dog teeth 242a reach the rear end of the chamfer (the shift stroke position where the engagement of the clutch sleeve 252 with the dog teeth 242a when the gear is released) is P12, the position where the rear end of the dog teeth 242a is reached. Is set to P13. This shift stroke position is detected by the shift stroke sensor 85 (SS). In the illustrated embodiment, the shift stroke sensor 85 (SS) outputs a voltage signal having the smallest value when the shift stroke position is P1, and the output voltage gradually increases as the shift stroke position moves toward P13. P1
It is configured to output the largest voltage signal at the time of 3.

When the clutch sleeve 252 is shifted from the neutral state shown in FIG. 10 to the fourth speed gear 242 side and the fifth speed gear 241 side (during gear-in), the shift stroke of P8 and P6 is applied to the shift lever 3. The largest operating force acts on the synchronization range from the position, that is, the position where the synchronization action is started, to P9 and P5 where the synchronization action ends. Therefore, at the time of gear-in, the shift actuator 80 (8)
0a), the coil 82 (MC1) may be energized to assist the shift operation. When the gear-in operation is performed, the shift lever 3 is provided with the shift stroke positions from P8 and P6 to P12 and P2, that is, the chamfer of the spline 252b of the clutch sleeve 252 and the dog teeth 2.
A relatively large force acts on the area of engagement with the chamfer 42a or 241a, which is smaller than the synchronous range. Therefore, during gear-in, the shift actuator 8 is also engaged during the engagement period between the dog teeth and the chamfer of the clutch sleeve.
It is desirable to assist the shift operation by energizing the coil 82 (MC1) constituting 0 (80a). On the other hand, when the gear is engaged with the fourth speed gear 242 or the fifth speed gear 241, that is, when the clutch sleeve 252 returns to the neutral state from the shift stroke position of P13 or P1 (when the gear is disengaged), When the spline 252b of the clutch sleeve 252 is the above P12 or P12
A relatively large force acts during the second shift stroke position, that is, before the dog tooth passes the rear end of the chamfer. Therefore, when the gear is disengaged, the coil 8 constituting the shift actuator 80 (80a) is provided during the shift stroke (the meshing range between the dog tooth and the clutch sleeve 252) from the gear-in state to the time when the dog tooth passes the rear end of the chamfer.
The shift operation may be assisted by urging 2 (MC1).

It should be noted that the assist force at the time of gear removal may be smaller than the assist force at the time of gear in. The control of the assist force is executed by controlling the electric power (voltage or current) applied to the coil 82 (MC1) constituting the shift actuator 80 (80a). When the clutch sleeve 252 is operated to the left in FIG. 10 (when the first switch 41 (SWI) of the shift knob switch 4 is ON), for example, the coil 8
When the clutch sleeve 252 is operated to the right in FIG. 10 (the second switch 42 (SW2) of the shift knob switch 4 is turned on) The current direction of the electric power applied to the coil 82 (MC1)
Direction. For example, when downshifting from the state in which the fifth speed gear 241 is engaged to the fourth speed, as shown in FIG. 10, the period from P1 to P2, that is, the spline 252b of the clutch sleeve 252 becomes the dog tooth 241a.
(The dog tooth engages with the clutch sleeve 252) until the voltage passes through the rear end of the chamfer (not shown). A voltage V1 is applied to the coil 82 (MC1) of the shift actuator 80 (80a) in the second current direction.

When the clutch sleeve 252 reaches the start position P8 of the synchronizing action from the neutral position P6, a voltage V2 higher than V1 is applied to the coil 82 (MC1) of the shift actuator 80 (80a). At this time, the current direction is the second direction), and the driving at the voltage V2 is maintained until the spline 252b of the clutch sleeve 252 passes the above-mentioned P12 corresponding to the rear end of the dog tooth 242a. As described above, in the shift assist device in the illustrated embodiment, only the shift actuator
0 (80a) is activated. Then, the coil 82 (MC1) of the shift actuator 80 (80a) is deenergized (OFF) in a range where the shift assist is unnecessary, but the magnet movable member 8 constituting the shift actuator 80 (80a) is turned off.
3 (83a) can be moved without resistance, so that the shift operation by the shift lever 3 does not become a resistance, so that the shift operation by the shift lever 3 can be performed smoothly.

In the above-described embodiment, when the shift actuator 80 (80a) is engaged in the gear-in operation, the spline 252 of the clutch sleeve 252 is shifted from P8, at which the clutch sleeve 252 starts the synchronization operation.
Although the example in which the drive is performed with the voltage V2 until a passes through the above-mentioned P12 corresponding to the rear end of the chamfer of the dog tooth 242a has been described, the shift assist range is as shown by the broken line in FIG. <P9) alone,
After the synchronization range, the spline 2 of the clutch sleeve 252
The voltage V1 may drive the period until 52b passes the above-mentioned P12 corresponding to the rear end of the chamfer of the dog tooth 242a, that is, the engagement range between the chamfer of the clutch sleeve and the chamfer of the dog tooth.

Next, the shift assist control of the controller 10 during the shift operation will be described with reference to the flowchart shown in FIG. First, the controller 10 checks whether or not the clutch pedal switch 91 (SW3) is ON, that is, whether or not the clutch pedal 9 is depressed to release the clutch (step S).
1). When the automatic clutch is mounted, it is checked whether or not the amount of engagement of the clutch is closer to the half-clutch side based on a signal from a clutch stroke sensor that detects the amount of engagement of the clutch. If the clutch pedal switch 91 (SW3) is not turned on in step S1, the controller 10 determines that there is no intention to shift because the clutch is not disconnected, and proceeds to step S2 to change the coil 82 (of the shift actuator 80 (80a)). M
The power supply to C1) is turned off.

If the clutch pedal switch 91 (SW3) is turned on in step S1, the controller 1
If it is 0, it is judged that the clutch is disconnected and there is a shift intention,
Proceeding to step S3, the first of the shift knob switches 4
Of the switch 41 (SW1) is turned on, that is, whether the shift operation to the first, third, and fifth speeds has been started. If the first switch 41 (SW1) is turned on in step S3, the controller 1
0 proceeds to step S4 and shift actuator 80
The current direction of the power supplied to the coil 82 (MC1) of (80a) is set to the first direction. Then, the controller 10 proceeds to step S5, and determines whether or not the shift stroke position P detected by the shift stroke sensor 85 (SS) is smaller than P2, that is, the clutch sleeve 25.
It is checked whether or not 2 is on the gear-in side from the rear end of the chamfer of the dog tooth 241a. If the shift stroke position P is smaller than P2 in step S5, the controller 10 determines that the clutch sleeve 252 is on the gear-in side from the rear end of the dog tooth 241a of the chamfer, and it is not necessary to perform the shift assist, and proceeds to step S6. And the coil 82 (MC) of the shift actuator 80 (80a)
Turn off the power supply to 1).

If the shift stroke position P is greater than P2 in step S5, the controller 10 proceeds to step S7 to determine whether the shift stroke position P is greater than P2 and less than P6, that is, the clutch sleeve 252.
Is in the range from the synchronization start position to the position where the dock tooth engages with the chamfer. If the shift stroke position P is equal to or larger than P2 and smaller than P6 in step S7, the controller 10
2 is in the range from the synchronization start position to the position where the dock tooth engages with the chamfer, and it is determined that shift assist at the time of gear-in is necessary, and the process proceeds to step S8 where coil 82 (MC1) of shift actuator 80 (80a) A voltage of V2 is applied.

If it is determined in step S7 that the shift stroke position P is not greater than P2 and smaller than P6, the controller 10 proceeds to step S9 to determine whether the shift stroke position P is greater than P6 and smaller than P8, that is, the clutch sleeve. Check if 252 is located between both synchronizer rings 255 and 256. If the shift stroke position P is equal to or larger than P6 and smaller than P8 in step S9, the controller 10
Determines that the clutch sleeve 252 is located between the synchronizer rings 255 and 256 and that it is not necessary to assist the shift operation, and proceeds to step S10, where the coil 82 (MC) of the shift actuator 80 (80a) is determined.
Turn off the power supply to 1).

If it is determined in step S9 that the shift stroke position P is not smaller than P6 and smaller than P8,
The controller 10 proceeds to step S11 to check whether or not the shift stroke position P is equal to or larger than P8 and smaller than P12, that is, whether or not the engagement between the clutch sleeve 252 and the dog teeth 242a is disengaged and the gear removal is completed. If the shift stroke position P is equal to or larger than P8 and smaller than P12 in step S11, the clutch sleeve 252
It is determined that the gear has been disengaged from the dog teeth 242a and the gear removal has been completed, and the process proceeds to step S10 to turn off the power supply to the coil 82 (MC1) of the shift actuator 80 (80a).

If it is determined in step S11 that the shift stroke position P is not smaller than P8 and smaller than P12, the controller 10 needs to assist the shift when the gear is disengaged because the clutch sleeve 252 and the dog teeth 242a are engaged. It is determined that there is, and the process proceeds to step S12, where the coil 8 of the shift actuator 80 (80a) is
2 (MC1) is applied with a voltage of V1.

Next, the case where the first switch 41 (SW1) of the shift knob switch 4 is not turned on in step S3 will be described. In step S3, the first switch 41 (SW) of the shift knob switch 4
If 1) is not ON, the controller 10 proceeds to step S13 and proceeds to the second switch 42 (SW2).
Is turned on, that is, whether the shift operation has been started to the second speed, the fourth speed, and the reverse side. If the second switch 42 (SW2) has not been turned on in step S13, the controller 10 determines that there is no intention to change gears, and proceeds to step S2 above, where the coil 82 (MC1) of the shift actuator 80 (80a) is moved. The power supply to is turned off.

In step S13, the second switch 4
If 2 (SW2) is ON, the controller 10 proceeds to step S14 and proceeds to step S14.
The current direction of the electric power supplied to the coil 82 (MC1) of Oa) is set to the second direction. And the controller 10
Goes to step S15 and shift shift sensor 8
Shift stroke position P detected by 5 (SS)
Is not less than P12, that is, whether the clutch sleeve 252 is on the gear-in side from the rear end of the chamfer of the dog teeth 242a. If the shift stroke position P is larger than P12 in step S15, the controller 10 determines that the clutch sleeve 252 is on the gear-in side from the rear end of the dog tooth 242a at the chamfer, and it is not necessary to perform shift assist. Then, the coil 82 (MC) of the shift actuator 80 (80a)
Turn off the power supply to 1).

If the shift stroke position P is smaller than P12 in step S15, the controller 10
Proceeds to step S16, and the shift stroke position P is
It is checked whether or not it is not less than 8 and less than P12, that is, whether or not the clutch sleeve 252 is in a range from the synchronization start position to the engagement position of the dock tooth with the chamfer. If the shift stroke position P is equal to or greater than P8 in step S16, P
If it is smaller than 12, the controller 10 determines that the clutch sleeve 252 is in the range of the engagement position of the dock teeth with the chamfer from the synchronization start position and it is necessary to perform shift assist at the time of gear-in, and proceeds to step S8. The coil 82 (M) of the shift actuator 80 (80a)
A voltage V2 is applied to C1).

If it is determined in step S16 that the shift stroke position P is not P8 or more and smaller than P12, the controller 10 proceeds to step S17 to determine whether the shift stroke position P is P6 or more and smaller than P8, that is, the clutch sleeve. Check if 252 is located between both synchronizer rings 255 and 256. If the shift stroke position P is equal to or larger than P6 and smaller than P8 in step S17, the controller 10 determines that the clutch sleeve 252 is located between both the synchronizer rings 255 and 256 and it is not necessary to assist the shift operation. And the above step S
Proceeding to 10, the power supply to the coil 82 (MC1) of the shift actuator 80 (80a) is turned off.

If it is determined in step S17 that the shift stroke position P is not at least P6 and less than P8, the controller 10 proceeds to step S18 to determine whether the shift stroke position P is at least P2 and less than P6.
That is, it is checked whether the clutch sleeve 252 is disengaged from the dog teeth 241a and the gear removal is completed. If the shift stroke position P is equal to or larger than P2 and smaller than P6 in step S18, the clutch sleeve 252
It is determined that the gear has been disengaged from the dog teeth 241a and the gear removal has been completed, and the process proceeds to step S10 to turn off the power supply to the coil 82 (MC1) of the shift actuator 80 (80a).

If the shift stroke position P is not greater than P2 and smaller than P6 in the step S18, the controller 10 needs to assist the shift when the gear is disengaged because the clutch sleeve 252 and the dog teeth 241a are engaged. It is determined that there is, and the above step S12
To apply the voltage V1 to the coil 82 (MC1) of the shift actuator 80 (80a).

Next, still another embodiment of the shift actuator used in the shift assist device of the transmission will be described with reference to FIG. FIG. 12 shows a cross-sectional view of the shift actuator 80b. The shift actuator 80b in the embodiment shown in FIG. 12 includes a first electromagnetic solenoid 91 and a second electromagnetic solenoid 92 for operating the control lever 62 in opposite directions.

Next, the first electromagnetic solenoid 91 will be described. The first electromagnetic solenoid 91 is connected to the casing 9.
11, a fixed iron core 912 made of a magnetic material disposed in the casing 911, and a non-magnetic material such as stainless steel disposed through a through hole 912a formed in the center of the fixed iron core 912. Operating rod 913, a movable iron core 914 made of a magnetic material attached to the operating rod 913 and arranged to be able to contact and separate from a fixed iron core 912, the movable iron core 914, the fixed iron core 912, and the casing 9.
11 and an electromagnetic coil 916 (MC2) wound around a bobbin 915 made of a non-magnetic material such as a synthetic resin. When the electromagnetic coil 916 (MC2) is energized, the movable core 914 is attracted to the fixed core 912 in the first electromagnetic solenoid 91 configured as described above.
As a result, the operating rod 913 with the movable iron core 914 attached thereto
Has moved to the left in FIG. 12, and its tip acts on one end of the control lever 62 to operate the control lever 62 in the direction indicated by the arrow 62a.

Next, the second electromagnetic solenoid 92 will be described. The second electromagnetic solenoid 92 is disposed to face the first electromagnetic solenoid 91. Similarly to the first electromagnetic solenoid 91, the second electromagnetic solenoid 92 has a casing 921, a fixed iron core 922 made of a magnetic material disposed in the casing 921, and a fixed iron core 922.
An operating rod 923 made of a non-magnetic material such as stainless steel and inserted through a through hole 922a formed at the center of
2, a movable core 924 made of a magnetic material and arranged to be able to contact and separate from the movable core 2, the movable core 924 and the fixed core 92
The electromagnetic coil 9 wound between a bobbin 925 made of a non-magnetic material such as a synthetic resin and disposed between the casing 2 and the casing 921
26 (MC3). The second electromagnetic solenoid 92 configured as described above includes an electromagnetic coil 926 (M
When power is supplied to C3), the movable core 924 is
It is sucked into 2. As a result, the operating rod 923 to which the movable iron core 924 is attached moves rightward in FIG. 12, and its tip acts on one end of the control lever 62.
The control lever 62 is operated in the direction indicated by the arrow 62b.

As described above, the shift actuator 80b in the embodiment shown in FIG. 12 includes the first electromagnetic solenoid and the second electromagnetic solenoid that operate the control lever 62 in directions opposite to each other. Is deenergized (OFF), the operating rod with the fixed iron core is moved by the control lever 6 by the shift lever 3.
Since there is no resistance to the operation of the shift lever 2, the shift lever 3
Shift operation can be performed smoothly.

Next, shift assist control using the shift actuator 80b in the embodiment shown in FIG. 12 will be described with reference to the flowchart shown in FIG. First, the controller 10 determines in the flowchart shown in FIG. 13 whether or not the clutch pedal switch 91 (SW3) is ON, that is, whether or not the clutch is disengaged by depressing the clutch pedal 9 as in step S1 of the embodiment. Is checked (step Q1). In step Q1, the clutch pedal switch 91 (SW
If 3) is not ON, the controller 10 determines that there is no shift intention because the clutch is not disengaged,
Proceeding to step SQ, the coil 916 (MC) of the first electromagnetic solenoid 91 constituting the shift actuator 80b
2) and the second electromagnetic solenoid coil 926 (MC
Turn off the power supply to 3).

If the clutch pedal switch 91 (SW3) is turned on in step Q1, the controller 1
If it is 0, it is judged that the clutch is disconnected and there is a shift intention,
Proceeding to step Q3, the first of the shift knob switches 4
Of the switch 41 (SW1) is turned on, that is, whether the shift operation to the first, third, and fifth speeds has been started. If the first switch 41 (SW1) is ON in step SQ, the controller 1
In step Q4, the process proceeds to step Q4.
Shift stroke position P detected by 5 (SS)
Is smaller than P2, that is, the clutch sleeve 252
Of the dog teeth 241a is on the gear-in side from the rear end of the chamfer. If the shift stroke position P is smaller than P2 in step Q4, the controller 10 determines that the clutch sleeve 252 is on the gear-in side from the rear end of the chamfer of the dog teeth 241a, and it is not necessary to perform shift assist, and proceeds to step Q5. Then, the power supply to the coil 916 (MC2) of the first electromagnetic solenoid 91 constituting the shift actuator 80b is turned off.

If the shift stroke position P is greater than P2 in step Q4, the controller 10 proceeds to step Q6 to determine whether the shift stroke position P is greater than or equal to P2 and less than P6, that is, the clutch sleeve 252.
Is in the range from the synchronization start position to the position where the dock tooth engages with the chamfer. If the shift stroke position P is equal to or larger than P2 and smaller than P6 in step Q6, the controller 10
2 is in the range from the synchronization start position to the engagement position of the dock tooth with the chamfer, and it is determined that it is necessary to perform the shift assist at the time of gear-in, and the process proceeds to step Q7 where the first electromagnetic solenoid 91 of the shift actuator 80b A voltage V2 is applied to the coil 916 (MC2).

If the shift stroke position P is not greater than P2 and smaller than P6 in step Q6, the controller 10 proceeds to step Q8 to determine whether the shift stroke position P is greater than P6 and smaller than P8, that is, the clutch sleeve. Check if 252 is located between both synchronizer rings 255 and 256. If the shift stroke position P is equal to or larger than P6 and smaller than P8 in step Q8, the controller 10
Determines that the clutch sleeve 252 is located between the synchronizer rings 255 and 256 and does not need to assist the shift operation, and proceeds to step Q9 where the first electromagnetic solenoid 91 of the shift actuator 80b is OF power supply to coil 916 (MC2)
F.

If the shift stroke position P is not equal to or larger than P6 and smaller than P8 in step Q8,
The controller 10 proceeds to step Q10 to check whether or not the shift stroke position P is equal to or larger than P8 and smaller than P12, that is, whether or not the engagement between the clutch sleeve 252 and the dog teeth 242a is disengaged and the gear removal is completed. If the shift stroke position P is equal to or larger than P8 and smaller than P12 in step Q10, the clutch sleeve 252
It is determined that the gear has been disengaged from the dog teeth 242a and the gear removal has been completed, and the process proceeds to step Q9 to turn off the power supply to the coil 916 (MC2) of the first electromagnetic solenoid 91 constituting the shift actuator 80b. .

If the shift stroke position P is not equal to or larger than P8 and smaller than P12 in the step Q10, the controller 10 needs to assist the shift when the gear is disengaged because the clutch sleeve 252 and the dog teeth 242a are engaged. It is determined that there is, and the process proceeds to step Q11 to apply the voltage V1 to the coil 916 (MC2) of the first electromagnetic solenoid 91 constituting the shift actuator 80b.

Next, the case where the first switch 41 (SW1) of the shift knob switch 4 is not turned on in step Q3 will be described. In step Q3, the first switch 41 of the shift knob switch 4 (SW
If 1) is not turned on, the controller 10 proceeds to step Q12 and proceeds to the second switch 42 (SW2).
Is turned on, that is, whether the shift operation has been started to the second speed, the fourth speed, and the reverse side. If the second switch 42 (SW2) has not been turned on in step Q12, the controller 10 determines that there is no intention to change gears, and in step Q2, the coil of the first electromagnetic solenoid 91 constituting the shift actuator 80b. The power supply to 916 (MC2) and the coil 926 (MC3) of the second electromagnetic solenoid is turned off.

In step Q12, the second switch 4
If 2 (SW2) is ON, the controller 10 proceeds to step Q13 and proceeds to the shift stroke sensor 85
It is checked whether or not the shift stroke position P detected by (SS) is equal to or greater than P12, that is, whether or not the clutch sleeve 252 is on the gear-in side of the dog tooth 242a from the rear end of the chamfer. If the shift stroke position P is larger than P12 in step Q13, the controller 1
0 indicates that the clutch sleeve 252 is on the gear-in side from the rear end of the chamfer of the dog teeth 242a and it is determined that there is no need to perform shift assist, and the process proceeds to step Q14 where the coil 926 of the second electromagnetic solenoid 92 constituting the shift actuator 80b is determined. The power supply to (MC3) is turned off.

If the shift stroke position P is smaller than P12 in step Q13, the controller 10
Goes to step Q15 and shift stroke position P
It is checked whether or not it is not less than 8 and less than P12, that is, whether or not the clutch sleeve 252 is in a range from the synchronization start position to the engagement position of the dock tooth with the chamfer. If the shift stroke position P is equal to or greater than P8 in step S15, P
If it is smaller than 12, the controller 10 determines that the clutch sleeve 252 is in the range from the synchronization start position to the position where the dock tooth engages with the chamfer, and it is necessary to perform shift assist at the time of gear-in. The voltage V2 is applied to the coil 926 (MC3) of the second electromagnetic solenoid 92 that constitutes the actuator 80b.

If the shift stroke position P is not equal to or larger than P8 and smaller than P12 in step Q15, the controller 10 proceeds to step Q17 to determine whether or not the shift stroke position P is equal to or larger than P6 and smaller than P8, that is, the clutch sleeve. Check if 252 is located between both synchronizer rings 255 and 256. If the shift stroke position P is equal to or larger than P6 and smaller than P8 in step Q17, the controller 10 determines that the clutch sleeve 252 is located between the synchronizer rings 255 and 256 and it is not necessary to assist the shift operation. Step Q18
Then, the power supply to the coil 926 (MC3) of the second electromagnetic solenoid 92 constituting the shift actuator 80b is turned off.

If it is determined in step Q17 that the shift stroke position P is not equal to or larger than P6 and smaller than P8, the controller 10 proceeds to step Q19 to determine whether the shift stroke position P is equal to or larger than P2 and smaller than P6.
That is, it is checked whether the clutch sleeve 252 is disengaged from the dog teeth 241a and the gear removal is completed. If the shift stroke position P is equal to or larger than P2 and smaller than P6 in step Q19, the clutch sleeve 252
It is determined that the gear has been disengaged from the dog teeth 241a and the gear removal has been completed, and the process proceeds to step Q18 to proceed to the second electromagnetic solenoid 92 constituting the shift actuator 80b.
The power supply to the coil 926 (MC3) is turned off.

If the shift stroke position P is not equal to or larger than P2 and smaller than P6 in the step Q19, the controller 10 needs to assist the shift when the gear is disengaged because the clutch sleeve 252 and the dog teeth 241a are engaged. It is determined that there is a
Then, the voltage V1 is applied to the coil 926 (MC3) of the second electromagnetic solenoid 92 constituting the shift actuator 80b. By performing control as described above, shift assist as shown in FIG. 10 can be executed.

[0060]

Since the shift assist device for a transmission according to the present invention is constructed as described above, the following operational effects can be obtained.

That is, according to the present invention, the shift actuator for shift assist does not resist the shift lever operation when the drive is stopped and is not operated. The shift operation by the shift lever can be performed smoothly.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a transmission mechanism provided with a shift assist device for a transmission configured according to the present invention.

FIG. 2 is a schematic configuration diagram showing a gear mechanism of the transmission shown in FIG.

FIG. 3 is a sectional view of a synchronizer provided in the transmission of FIG. 2;

FIG. 4 is a view showing a shift pattern of a speed change lever of the speed change mechanism shown in FIG. 1;

FIG. 5 is a perspective view of a main part of a shift mechanism constituting the transmission mechanism shown in FIG. 1;

FIG. 6 is a sectional view showing one embodiment of a shift actuator used in the shift assist device of the transmission shown in FIG. 1;

FIG. 7 is an explanatory view showing each operation state of the shift actuator shown in FIG. 6;

FIG. 8 is a sectional view showing another embodiment of the shift actuator.

FIG. 9 is an explanatory view showing each operation state of the shift actuator shown in FIG. 8;

FIG. 10 is an explanatory diagram showing a relationship between a shift stroke position of a clutch sleeve of the synchronous device shown in FIG. 2 and a voltage applied to a shift actuator of the shift assist device.

FIG. 11 is a flowchart illustrating an operation procedure of a shift assist control of a controller constituting the shift assist device of the transmission configured according to the present invention.

FIG. 12 is a sectional view showing still another embodiment of the shift actuator.

13 is a flowchart showing an operation procedure of shift assist control of a controller constituting the shift assist device using the shift actuator shown in FIG.

[Explanation of symbols]

2: Transmission 21: Transmission input shaft 22: Transmission output shaft 23: Transmission counter shaft 241: Driving gear (fifth speed gear) 241a: Dog tooth 242: Fourth speed gear 242a: Dog tooth 243 : Third speed gear 244: Second speed gear 25a, 25b, 25c: Synchronizing device 261, 262, 263, 264, 265, 266: Counter gear 251: Clutch hub 252: Clutch sleeve 253: Key 254: Key spring 255, 256: synchronizer ring 3: shift lever 31: shift lever knob 4: shift knob switch 41: first switch (SWI) 42: second switch (SW2) 6: shift mechanism 61: push-pull cable 62: control lever 63: Control rod 64: Shift lever 65: Shift Head 66: ft block 67: shift fork 8: shift assist device 80: shift actuator 81: fixed yoke 82: coil (M1) 83: magnet movable body 831: shift plunger 832: movable yoke 833: permanent magnet 80a: shift Actuator 831a: Intermediate yokes 832a, 833a: Pair of permanent magnets 80b: Shift actuator 91: First electromagnetic solenoid 911: Casing 912: Fixed iron core 913: Operating rod 914: Moving iron core 915: Bobbin 916: Electromagnetic coil (MC2) 92 : Second electromagnetic solenoid 921: casing 922: fixed iron core 923: operating rod 924: movable iron core 925: bobbin 926: electromagnetic coil (MC2) 85: shift stroke sensor (SS) 86: rod 87: lever 9 : Clutch pedal 91: Clutch pedal switch (SW3) 10: Controller

Claims (8)

[Claims] 1. A shift assist device for a transmission for operating a shift mechanism coupled to a shift lever and operating a synchronous device of a transmission in the same direction as a shift operation direction of the shift lever. A shift plunger engaged with the coupled operating member, a magnet movable body disposed on an outer peripheral surface of the shift plunger, a cylindrical fixed yoke disposed to surround the magnet movable body, and the fixed yoke A shift actuator that includes a coil disposed inside the shift mechanism; a shift stroke sensor that detects a shift stroke position of the shift mechanism; and a control signal to the coil of the shift actuator based on a detection signal of the shift stroke sensor. And a controller for outputting a signal when the gear-in operation is performed. For at least the locking range at the stroke range, and supplies electric power to the coil for meshing range of the clutch sleeve and the dog teeth of at least the synchronization device in the gear-disengaging operation, shift-assisting device for a transmission, characterized in that. 2. The controller according to claim 1, wherein the controller controls the power supplied to the coil in an engagement range between the clutch sleeve and the dog teeth during the gear disengagement operation to be smaller than the power supplied to the coil in the synchronization range during the gear-in operation. The shift assist device for a transmission according to claim 1, wherein the shift assist device is set. 3. The controller according to claim 1, wherein the controller is configured to control the coil for at least a synchronization range in a shift stroke range of the shift mechanism and an engagement range between a chamfer of a clutch sleeve and a chamfer of a dog tooth of the synchronizer during the gear-in operation. The shift assist device for a transmission according to claim 1, which supplies electric power. 4. The controller supplies electric power to be supplied to the coil in an engagement range between the chamfer of the clutch sleeve and the chamfer of the dog teeth during the gear-in operation to the coil in the synchronous range during the gear-in operation. The shift assist device for a transmission according to claim 3, wherein the power is set to be smaller than the power to be applied. 5. A shift assist device for a transmission for operating a shift mechanism connected to a shift lever and operating a synchronous device of a transmission in the same direction as a shift operation direction of the shift lever. A shift actuator including a first electromagnetic solenoid and a second electromagnetic solenoid that actuate the coupled operating members in opposite directions; a shift stroke sensor that detects a shift stroke position of the shift mechanism; A controller that outputs a control signal to the first electromagnetic solenoid or the second electromagnetic solenoid of the shift actuator based on the detection signal, wherein the controller has a shift stroke range of the shift mechanism during a gear-in operation. At least for the synchronizing range At least the meshing range of the clutch sleeve and the dog teeth of the synchronization device for supplying electric power to the first electromagnetic solenoid or the second electromagnetic solenoid, shift-assisting device for a transmission, characterized in that at the time. 6. The controller according to claim 1, wherein the controller supplies the power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid in an engagement range between the clutch sleeve and the dog teeth during the gear disengagement operation during the gear-in operation. 6. The shift assist device for a transmission according to claim 5, wherein the electric power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid in a synchronization range is set smaller than the electric power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid. 7. The controller according to claim 1, wherein at least one of a synchronization range in a shift stroke range of the shift mechanism and an engagement range between a chamfer of a clutch sleeve and a chamfer of a dog tooth of the synchronizer during the gear-in operation. The shift assist device for a transmission according to claim 5, wherein electric power is supplied to said electromagnetic solenoid or said second electromagnetic solenoid. 8. The controller according to claim 1, wherein the controller supplies the power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid in an engagement range between the chamfer of the clutch sleeve and the chamfer of the dog teeth during the gear-in operation. 8. The shift assist device for a transmission according to claim 7, wherein the electric power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid in the synchronization range during operation is set to be smaller than the electric power supplied to the first electromagnetic solenoid or the second electromagnetic solenoid.