JP6000178B2 - Vehicle transmission - Google Patents

Vehicle transmission Download PDF

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Publication number
JP6000178B2
JP6000178B2 JP2013071757A JP2013071757A JP6000178B2 JP 6000178 B2 JP6000178 B2 JP 6000178B2 JP 2013071757 A JP2013071757 A JP 2013071757A JP 2013071757 A JP2013071757 A JP 2013071757A JP 6000178 B2 JP6000178 B2 JP 6000178B2
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shift
speed
rotation
drive
shaft
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JP2014196754A (en
Inventor
坂本 友和
友和 坂本
智宏 塚本
智宏 塚本
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本田技研工業株式会社
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/72Electric energy management in electromobility

Description

  The present invention has a main shaft to which power from a drive source is transmitted, a plurality of drive gears provided on the main shaft so as not to rotate relative to each other, an axis parallel to the main shaft, and interlocked with and connected to the drive wheels. A counter shaft, a plurality of driven gears individually meshed with the plurality of drive gears and supported by the counter shaft so as to be rotatable relative to each other, and a locking portion of each of the plurality of driven gears is selectively engaged. A slide shaft that is inserted into the counter shaft so as not to be relatively rotatable and axially movable, a shift drum that can be rotated to drive the slide shaft in the axial direction, and forward and reverse A shift power source that can rotate, and a shift spindle that rotates in response to the operation of the power source for transmission, and that is adapted to reciprocating rotation of the shift spindle. A shift actuator that rotationally drives the shift drum by one shift step, and a plurality of engagement portions of the slide shaft that are selectively engaged with the engagement portions of the plurality of driven gears. The speed change region and the neutral region set between the plurality of speed change regions so that the engaging portion is disengaged with respect to any of the plurality of locking portions are axes of the slide shaft. The present invention relates to a vehicle transmission set in a direction movement range.

  Provided between the main shaft and the countershaft by driving and engaging a slide shaft that cannot be rotated relative to the countershaft in one of the driven gears that are always meshed with a plurality of drive gears. Japanese Patent Application Laid-Open No. 2004-151867 discloses a vehicle transmission device that alternatively establishes one of a plurality of gear trains having a plurality of shift speeds.

JP 2004-001618 A

  However, in the one disclosed in Patent Document 1, a clutch is provided between the crankshaft and the main shaft, and a plurality of driven gears are moved by moving the slide shaft in the axial direction in a state where power transmission is interrupted by the clutch. One of these is selectively engaged with the slide shaft, but a clutch is required.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a vehicular transmission that enables automatic gear shifting while eliminating the need for a clutch.

  To achieve the above object, the present invention has a main shaft to which power from a drive source is transmitted, a plurality of drive gears provided on the main shaft so as not to be relatively rotatable, and an axis parallel to the main shaft. And a countershaft linked to and connected to the drive wheels, a plurality of driven gears individually meshed with the plurality of drive gears and supported so as to be relatively rotatable on the countershaft, and a plurality of the driven gears. A slide shaft that has an engagement portion that selectively engages with a stop portion and is inserted into the counter shaft so as not to be relatively rotatable and axially movable, and to rotate the slide shaft in the axial direction Shift drum, shift power source capable of forward and reverse rotation, and shift spindle that rotates in response to the operation of the shift power source and the shift A shift actuator that rotates the shift drum by one shift stage in accordance with the reciprocating rotation of the pindle, and the engagement portion of the slide shaft is selected as the engagement portion of each of the plurality of driven gears. A plurality of speed change areas to be engaged with each other and a neutral position arranged between the plurality of speed change areas so that the engagement portion is in a non-engagement state with respect to any of the plurality of locking portions. And a shift spindle rotation position detecting means for detecting a rotation position of the shift spindle, and a rotation position of the shift drum. Shift drum rotation position detection means, vehicle speed detection means, rotation speed detection means for detecting the rotation speed of the drive source, accelerator operation amount detection means, and detection values of these detection means A control device that controls the operation of the power source for shifting, and the control device automatically shifts the rotational speed of the drive source from the set rotational speed for a predetermined time when the gear ratio is automatically shifted during automatic shifting. A first step of starting the operation of the power source for shifting to rotate the shift spindle from a reference position in response to the shift and cutting the load of the drive source, and until the slide shaft enters a neutral region A second control unit configured to control the rotational speed of the drive source to a target rotational speed determined based on detection values of the rotational speed detection unit and the accelerator operation amount detection unit in response to confirming that the shift drum has rotated; In response to confirming that the amount of rotation of the shift spindle has reached the set amount of rotation while the slide shaft is in the neutral region. A third step of operating the shift power source to return the shift spindle to the reference position while holding the shaft in the neutral region; and the driving after confirming that the shift spindle has returned to the reference position. The shift power source is operated to drive the slide shaft to the shift region side to be switched among the plurality of shift regions in response to confirming that the rotation speed of the source is the target rotation number. These steps are executed in this order as a first feature.

  According to the present invention, in addition to the configuration of the first feature, the control device may be configured such that the shift drum is moved to a rotation position where the engagement portion contacts the engagement portion to be switched among the plurality of engagement portions. A fifth step of reducing the moving speed of the slide shaft by lowering the operating speed of the power source for shifting in response to confirming that it has rotated, and the engaging part on the locking part to be switched In response to confirming that the shift drum has rotated to the rotation position where the first and second engagements are engaged, the load of the drive source is returned to the load before the first step is started, and the state is maintained. The second feature is that these steps are sequentially executed.

  The third feature of the present invention is that, in addition to the configuration of the first or second feature, a spring for biasing the shift spindle toward the reference position is provided.

  Furthermore, in addition to any of the configurations of the first to third features, the present invention provides the control device with a predetermined time interval from the start of operation of the power source for shifting in the first step. The fourth feature is that the load of the drive source is cut.

  According to the first aspect of the present invention, in the automatic shifting, the operation of the power source for shifting is started so as to rotate the shift spindle from the reference position, the load of the driving source is cut, and the slide shaft is in the neutral region. Control the number of rotations of the drive source to the target number of rotations according to the movement, and then return the shift spindle to the reference position while holding the slide shaft in the neutral region, and drive with the shift spindle returned to the reference position. When the rotation speed of the source is the target rotation speed, the slide shaft is moved to the shift area to be switched, and the slide shaft is temporarily stopped in the neutral area while controlling the torque of the drive source. Smooth automatic transmission is possible even if no clutch is provided between the power source and the main shaft.

  Further, according to the second feature of the present invention, when the slide shaft moves from the neutral region, the shift shock is reduced by reducing the moving speed of the slide shaft when the engaging portion comes into contact with the engaging portion to be switched. And the load of the drive source is restored in response to the engagement of the engaging portion with the engaging portion to be switched, thereby enabling smooth automatic switching.

  According to the third aspect of the present invention, since the shift spindle is spring-biased toward the reference position, when the shift spindle is returned to the reference position, the spring-biasing force is added to the force from the power source for shifting. Also acts on the shift spindle, and the shift spindle can be quickly returned to the reference position.

  Furthermore, according to the fourth aspect of the present invention, the load of the drive source is cut at a predetermined time interval from the start of the operation of the shift power source when the automatic shift is started, so that the driving feeling of the vehicle is impaired. Automatic transmission can be performed.

It is a side view of a swing type small tricycle. It is a principal part enlarged view of FIG. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. It is a principal part enlarged view of FIG. FIG. 5 is a sectional view taken along line 5-5 in FIG. FIG. 6 is an enlarged view of a portion indicated by an arrow 6 in FIG. 4. It is an expanded view of the outer periphery of a shift drum. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 4. It is a block diagram which shows the structure for controlling the action | operation of the electric motor for transmission. It is a timing chart which shows the control state at the time of automatic shifting.

  Embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, front and rear, left and right, and top and bottom refer to directions viewed from the driver who rides on the swinging small tricycle.

  First, in FIG. 1, a cabin 12 with a roof having a windscreen 11 disposed on the front surface is formed in a central portion of a vehicle body B included in a swing type tricycle so that a bottom surface is a low floor type floor 13. A steering handle 14 is supported on the front wall of the cabin 12 so as to be steerable, and a passenger seat 15 for seating a vehicle driver is disposed behind the steering handle 14 in the cabin 12. In this way, the vehicle body B is provided. A single front wheel WF that is steered by the steering handle 14 is suspended at the front portion of the vehicle body B, and a loading platform 16 is provided at the rear portion of the vehicle body B.

  The power unit P that drives the left rear wheel WRL and the right rear wheel WRR as a pair of left and right drive wheels is disposed below the cargo bed 16, and the power unit P swings left and right with respect to the vehicle body B. It is connected to the vehicle body B through the swing connecting mechanism 17. The power unit P is disposed between the left rear wheel WRL and the right rear wheel WRR, and a pair of left and right cushion units 18 are provided between the rear portion of the vehicle body B and the power unit P.

  2 and 3 together, the power unit P includes an electric motor 20 as a drive source capable of forward / reverse rotation control, a transmission 21 that changes the output of the drive motor 20, and the left rear. And a differential gear mechanism 22 provided between the left and right axles 23L and 23R respectively connected to the wheel WRL and the right rear wheel WRR.

  The case 24 of the power unit P forms a power transmission chamber 30 between the first case member 25 and the left cover member 27 and the first case member 25 which are mutually coupled by forming a motor chamber 29 therebetween. Thus, a transmission chamber 31 is formed between the second case member 26 and the second case member 26 that is coupled to the first case member 25 from the side opposite to the left cover member 27, thereby forming the second case member. 26 and a right cover member 28 coupled from the right side, and a power drive unit 32 is disposed above the case 24.

  The motor chamber 29 accommodates the drive motor 20 having a motor shaft 34 parallel to the axles 23L and 23R. The drive motor 20 is a stator 35 fixed to the first case member 25. A rotor 36 is disposed in the motor shaft 34, one end of which is rotatably supported by the left cover member 27 via a ball bearing 37. The motor shaft 34 passes through the rotor 36 and is fixed to the rotor 36. The other end portion of the motor shaft 34 penetrating the first case member 25 is rotatably supported by the second case member 26 via a ball bearing 38. An annular seal member 39 and a ball bearing 40 are interposed between the first case member 25 and the motor shaft 34 in this order from the motor chamber 29 side.

  Referring also to FIG. 4, the transmission 21 includes a main shaft 41 that is linked and connected to the motor shaft 34, and a plurality of drive gears 43, 44, 45 provided on the main shaft 41 so as not to be relatively rotatable. A countershaft 42 formed in a cylindrical shape having an axis parallel to the main shaft 41 and a plurality of the drive gears 43 to 45 so as to be individually meshed with the countershaft 42 so as to be relatively rotatable. And a plurality of driven gears 46, 47, 48 to be supported. In this embodiment, a first speed drive gear 43, a second speed drive gear 44, and a third speed drive gear 45 are provided on the main shaft 41 so as not to rotate relative to each other. The first-speed driven gear 46 that meshes with the first-speed drive gear 43 so as to form the first-speed gear train G1 together with the first-speed drive gear 43 and the second-speed drive gear 44 together with the second-speed drive gear 43. A third speed gear train G3 is configured together with a second speed driven gear 47 meshing with the second speed drive gear 44 so as to constitute the gear train G2 and a third speed drive gear 45. A third speed driven gear 48 meshing with the speed driving gear 45 is supported so as to be relatively rotatable. Moreover, the first to third speed drive gears 43 to 45 and the first to third speed driven gears 46 to 48 are accommodated in the power transmission chamber 30.

  Both end portions of the main shaft 41 and the counter shaft 42 are rotatably supported by the first and second case members 26 via ball bearings 49, 50; 51, 52. A primary reduction drive gear 54 formed integrally with the motor shaft 34 is meshed with a primary reduction driven gear 53 fixed to the end portion on the case member 26 side, and the rotational power of the motor shaft 34 is supplied to the drive gear 54 and It is transmitted to the main shaft 41 via the driven gear 53.

  The differential gear mechanism 22 is accommodated in the transmission chamber 31 and is connected to the differential carrier 56 and the left and right axles 23L and 23R individually and in a relatively non-rotatable manner. A pair of side gears 57, 57 to be accommodated, a pinion shaft 58 having an axis orthogonal to the axes of the left axle 23L and the right axle 23R and both ends supported by the differential carrier 56, and both the side gears 57, 57 And a pair of pinions 59 and 59 which are fixed to the pinion shaft 58 and accommodated in the differential carrier 56.

  The left end portion of the differential carrier 56 is rotatably supported via a ball bearing 60 on a bearing housing 25a provided integrally with the first case member 25 of the case 24, and the right end portion of the differential carrier 56 is A cylindrical axle case 28a provided on the right cover member 28 is rotatably supported via a ball bearing 61 on the inner end portion of the cylindrical axle case 28a. The left axle 23L, the inner end of which is supported by the left end of the differential carrier 56 so as to be relatively rotatable, includes the bearing housing 25a of the first case member 25 and the bearing housing 27a provided on the left cover member 27. The outer end of the left axle 23L is connected to the wheel 66L of the left rear wheel WRL, and an annular seal member 62 is interposed between the bearing housing 25a and the left axle 23L. A ball bearing 63 is interposed between the left axle 23L and the left axle 23L.

  The right axle 23R, the inner end of which is supported by the right end of the differential carrier 56 so as to be relatively rotatable, passes through the axle case 28a of the right cover member 28, and is formed at the outer end of the right axle 23R. The wheel 66R of the right rear wheel WRR is connected. Moreover, an annular seal member 64 and a ball bearing 65 are interposed between the right axle 23R and the axle case 28a between the right end of the differential carrier 56 and the inner end of the axle case 24. The seal member 64 is disposed at a position close to 61 from the outside.

  Referring to FIG. 3, a drum brake BL for braking the left rear wheel WRL is disposed in the wheel 66L of the left rear wheel WRL. A drum brake BR, which is a braking device for braking the right rear wheel WRR, is disposed in the wheel 66R of the right rear wheel WRR, and a brake panel 67 constituting a part of the drum brake BR is provided. The right cover member 28 is integrally provided with a protruding portion 28b that protrudes toward the right rear wheel WRR outside the axle case 24, and the tip of the protruding portion 28b The panel 67 is integrally connected to the outer periphery.

  The rotational power from the counter shaft 42 is transmitted to the transmission drive gear 68 that is formed integrally with the counter shaft 42 in the power transmission chamber 30 and coaxially with the differential carrier 56. The gear is transmitted to the differential carrier 56 of the differential gear mechanism 22 through a meshed transmission driven gear 69 and a damper spring 70 interposed between the transmission driven gear 69 and the differential carrier 56.

  5 and 6 together, of the cylindrical counter shaft 42, a ball bearing interposed between the transmission drive gear 68, one end of the counter shaft 42 and the first case member 25. 50 is a gear support portion 42a that supports the first to third speed driven gears 46 to 48 so as to be relatively rotatable, and the like in the circumferential direction of the gear support portion 42a. Slits 71, 71,... Extending in the axial direction are provided at four intervals. On the other hand, a slide shaft 72 coaxial with the counter shaft 42 is inserted into the gear support portion 42a so as to be movable in the axial direction, and the end of the slide shaft 72 is engaged with the end portion of the slide shaft 72 in the gear support portion 42a. A cross-shaped pole 73 as a part is fixed so as to be inserted into the slits 71, 71.

  On the other hand, on the inner periphery of the first to third speed driven gears 46 to 48, four locking portions 46 a, 47 a, 48 a, which can be engaged with the pawl 73 engage the pawl 73. It is provided at equal intervals in the circumferential direction. That is, the slide shaft 72 which can selectively engage with the first to third speed driven gears 46 to 48 cannot be rotated relative to the counter shaft 42 in the axial direction in the gear support portion 42a. It is inserted movably.

  By the way, the locking portions 46a... Of the first speed driven gear 46 are driven at the first speed driven at positions spaced axially inward from the sliding contact portions of the first and second speed driven gears 46, 47. The locking portions 47a of the second speed driven gear 47 provided on the inner periphery of the gear 46 are slidable contact portions of the first and second speed driven gears 46, 47 and the second and third speed driven gears. The locking portions 48a of the third speed driven gear 48 are provided on the inner periphery of the second speed driven gear 47 at positions spaced axially inward from the sliding contact portions of the gears 47, 48. Provided on the inner periphery of the third speed driven gear 48 at a position spaced axially inward from the sliding contact portions of the second and third speed driven gears 47, 48, the axial width of the pole 73 is , 47a..., 48a. Therefore, within the axial movement range of the slide shaft 72, the first, second and third speed change regions A1 in which the engaging portions 73 are selectively engaged with the engaging portions 46a, 47a,. , A2, A3 and the engaging portions 46a..., 47a..., 48a. , A2 and A3, the first and second neutral regions N1 and N2 are set.

  In FIG. 4 again, a cylindrical shift drum 75 which is a shaft driving member for driving the slide shaft 72 spans the power transmission chamber 30 and the transmission chamber 31 while surrounding the slide shaft 72 coaxially. Arranged.

  One end portion of the shift drum 75 is inserted into the counter shaft 42, and the gear support portion 42a is brought into contact with an annular step portion 42b provided on the inner periphery of the counter shaft 42. The other end of the shift drum 75 protrudes from the counter shaft 42 into the transmission chamber 31 so as to be prevented from moving to the side, and abuts against the inner ring of the ball bearing 76 fitted into the counter shaft 42. To do. The inner periphery of the inner ring of the ball bearing 76 contacts the outer periphery of the slide shaft 72 so as to allow the slide shaft 72 to move in the axial direction.

  A cylindrical regulating projection 28c whose tip is slidably contacted with the other end of the shift drum 75 is provided integrally with the right cover member 28 at a portion corresponding to the projection 28b. The end of the slide shaft 72 protruding from the other end of the shift drum 75 on the shift chamber 31 side is formed with a bottomed fitting hole formed from the restricting protrusion 28c to a part of the protrusion 28b. A pin 79 is inserted into and fixed to the restricting protrusion 28c in a long hole 78 provided in the slide shaft 72 and extending in the axial direction in the fitting hole 77. Inserted.

  The slide shaft 72 is provided with a guide pin 81 that protrudes from the slide shaft 72 in a direction orthogonal to the axis of the countershaft 42. The shift drum 75 rotates around the axis. Guide holes 82 and 82 for fitting both ends of the guide pin 81 so as to displace the slide shaft 72 in the axial direction according to the movement are provided.

  In FIG. 7, a pair of guide holes 82, 82 into which both ends of the guide pin 81 are fitted are formed in the shift drum 75 so as to be symmetric with respect to the axis of the shift drum 75.

  The shift drum 75 has a first speed position at which the pawl 73 of the slide shaft 72 is positioned at the center of the first speed change region A1 and engaged with the engaging portions 46a of the first speed driven gear 46; A second speed position in which the pawl 73 of the slide shaft 72 is positioned at the center of the second speed change region A2 and engaged with the engaging portions 47a of the second speed driven gear 47, and the pawl 73 of the slide shaft 72 is A third speed position located in the center of the third speed change region A3 and engaged with the locking portion 48a of the third speed driven gear 48; a first neutral position between the first and second speed positions; And the second neutral position between the third speed positions are spaced apart in the axial direction of the shift drum 75 so that the pole 73 of the slide shaft 72 is positioned at the center of the first and second neutral regions N1, N2. Open and set.

  The guide hole 82 has a first speed gear train establishing portion 82a extending in the circumferential direction of the shift drum 75 at the first speed position and a second speed gear train establishing in the circumferential direction of the shift drum 75 at the second speed position. A portion 82b, a third speed gear train establishing portion 82c extending in the circumferential direction of the shift drum 75 at the third speed position, a first neutral portion 82d extending in the circumferential direction of the shift drum 75 at the first neutral position, And a second neutral portion 82e extending in the circumferential direction of the shift drum 75 at the two neutral positions.

  The shift drum 75 is rotationally driven by a speed change actuator 84. The speed change actuator 84 swings in response to a shift motor 85 that is a speed change drive motor and the operation of the speed change drive motor 85. A shift arm 86, a reduction gear mechanism 87 provided between the shift motor 85 and the shift arm 86, a speed change drive gear 88 that rotates according to the swing of the shift arm 86, and the speed change drive gear 88 are engaged with each other. Thus, a shift driven gear 89 provided integrally with the outer periphery of the other end of the shift drum 75 is provided.

  The speed change drive gear 88 is fixed to a rotation shaft 92 that is rotatably supported by the second case member 26 and the right cover member 28 via ball bearings 90, 91. The rotation member 93 is fixed. The speed change drive gear 88 is formed with a larger diameter than the speed change driven gear 89 so as to increase the speed of the rotational power from the rotary shaft 92 and transmit it to the shift drum 75.

  Referring also to FIG. 8, a positioning notch corresponding to the first to third speed positions and the first and second neutral positions set by the shift drum 75 is provided on the outer periphery of the rotating member 93. 94, 94... Are provided between each other.

  A drum stopper arm 95 is selectively engaged with the notches 94, 94..., And this drum stopper arm 95 has an axis parallel to the axis of the rotary shaft 92 and has a second case member 26. Are supported at the tip of the arm 97 so as to be engaged with one of the notches 94, 94... And roller 98. A torsion spring 99 is provided between the base end portion of the arm 98 and the second case member 26, and the arm 97 is configured to engage the roller 98 with one of the notches 94, 94. The spring force exerted by the spring 99 is biased toward the rotation center of the rotation member 93.

  A shift spindle 100 having an axis parallel to the rotation shaft 92 is rotatably supported by the second case member 26 and the right cover member 28 via ball bearings 101 and 102. The base end portion of the shift arm 86 is fixed, and the shift arm 86 swings as the shift spindle 100 rotates.

  An arm 103 extending in the radial direction of the shift spindle 100 is integrally connected to the base end portion of the shift arm 86, and this arm 103 is long in a direction perpendicular to the longitudinal direction of the arm 103. A long hole 104 is provided, and a protrusion 105 positioned on a straight line connecting the circumferential center of the long hole 104 and the axis of the shift spindle 100 protrudes from the tip of the arm.

  On the other hand, the second case member 26 and the right cover member 28 support both ends of the pin 106 inserted through the elongated hole 104, and a pair of sandwiching arms sandwiching the protrusion 105 and the pin 106 from both sides. A pinching spring 107 having 107 a and 107 a at both ends is disposed between the shift arm 86 and the arm 103 and the second case member 26 so as to surround the shift spindle 100. As a result, the shift arm 86 and the arm 103 are urged toward a reference position where the protrusion 105 and the pin 106 are aligned on a straight line connecting the circumferential center of the long hole 104 and the axis of the shift spindle 100. It will be.

  The rotating member 93 is formed in a cup shape, and an engaging pin 109 provided on a shifter 108 rotatably mounted on the rotating shaft 92 is disposed so as to enter the rotating member 93. The shift arm 86 is engaged with a long hole-like engagement hole 110. Accordingly, the shifter 108 is rotated about the axis of the rotation shaft 92 by the swing of the shift arm 86.

  Between the shifter 108 and the rotation member 93, one reciprocal swing of the shift arm 86 from the reference position is converted into rotation of the rotation member 103 and the transmission drive gear 88 by a predetermined angle. A conventionally known pole ratchet mechanism 110 is provided.

  The shift motor 85 has a rotation axis parallel to the shift spindle 100 and is attached to the right cover member 28.

  The reduction gear mechanism 87 is rotatably supported by the drive gear 112 provided integrally with the motor shaft 85a of the shift motor 85, the second case member 26 and the right cover member 28 via ball bearings 113 and 114. A torque limiter 117 is interposed between the first intermediate shaft 15 and a first intermediate gear 116 which is provided integrally with the first intermediate shaft 115 and meshes with the drive gear 112, and can rotate relative to the first intermediate shaft 116. The second intermediate gear 118 supported by the second intermediate shaft 118 and the second intermediate shaft 121 rotatably supported by the second case member 26 and the right cover member 28 via the ball bearings 119, 120 are provided integrally with the second intermediate gear 118. A sector gear-shaped third intermediate gear 122 meshing with the gear 118, a fourth intermediate gear 123 provided integrally with the second intermediate shaft 121, and a fourth intermediate gear 1 3 so as to mesh and a driven sector gear 124 fixed to the shift spindle 100.

  The speed change actuator 83 has the motor shaft 85a, the rotation shaft 92, the support shaft 96, the shift spindle 100, the first intermediate shaft 115, and the second intermediate shaft 121 as described above. A plurality of shafts 85a, 92, 96, 100, 115, 121 and the main shaft 41 are arranged at positions overlapping the drive motor 20 in the direction along the axis of the drive motor 20, as clearly shown in FIG. Is done.

  A shift spindle rotation position detecting means 125 for detecting the rotation position of the shift arm 86 and the shift spindle 100 is attached to the right cover member 28 so as to be coaxially connected to the shift spindle 100. A shift drum rotation position detection means 126 for detecting the rotation position of the shift drum 75 is also attached to the right cover member 28 as shown in FIG. 3, and a detection shaft 127 of the shift drum rotation position detection means 126 is attached. The gear 128 provided on the gear is meshed with the shift driven gear 89.

  In FIG. 9, the operations of the drive motor 20 and the shift motor 85 are controlled by a control device 130. The control device 130 controls the power drive unit 32 that controls the drive motor 20, and the power drive unit. And a shift motor control unit 131 that controls the operation of the shift motor 85 so as to be able to send and receive signals to and from the vehicle 32, a vehicle speed detection means 132, and a rotation speed detection means 133 that detects the rotation speed of the drive motor 20. The accelerator operation amount detecting means 134, the automatic / manual mode changeover switch 135, and the shift instruction means 136 operated by the driver in the manual mode are connected to the power drive unit 32, and the shift spindle turning position detecting means 125 is connected. And the shift drum rotation position detecting means 126 is It is connected to the word drive unit 32 and the shift motor control unit 131.

  When the driver selects the manual mode with the automatic / manual mode changeover switch 135, the shift motor control unit 131 controls the operation of the shift motor 85 in accordance with a shift operation command input from the shift instruction means 136. As a result, the shift arm 86 swings and the first to third speed gear trains G1 to G3 are alternatively established.

  When the driver selects the automatic mode with the automatic / manual mode changeover switch 135, the control device 130 causes the vehicle speed detection means 132, the rotation speed detection means 133, the accelerator operation amount detection means 134, the shift. Based on the detection values of the spindle rotation position detection means 125 and the shift drum rotation position detection means 126, the operation of the drive motor 20 and the shift motor 85 is controlled to execute the first to eighth steps. For such operation control during automatic shifting, the rotational speed of the drive motor 20, the energization current of the shift motor 85, the rotational position of the shift spindle 100, the required torque of the drive motor 20, the rotational position of the shift drum The shift position will be described with reference to FIG. 10 showing the change in the automatic shift from the first speed to the second speed.

  At the time of automatic change, the control device 130, in the first step, the vehicle speed is a predetermined speed V or higher and the rotational speed of the drive motor 20 deviates from the set rotational speed NS for a predetermined time T1 (shift). The operation of the shift motor 85 is started to rotate the shift spindle 100 from the reference position at a time t1 in response to the time of up), and an interval of a predetermined time T2 is started from the start of the operation of the shift motor 85. Then, the load of the drive motor 20 is cut. That is, the drive motor 20 shifts from the map control state based on the map to the zero torque control, and the torque of the drive motor 20 decreases.

  In the next second step, the shift drum 75 indicates that the shift drum 75 has rotated until the slide shaft 72 enters the neutral region (the first neutral region N1 when shifting from the first speed to the second speed). The target rotational speed determined based on the detection values of the rotational speed detection means 133 and the accelerator operation amount detection means 134 at time t2 confirmed based on detecting that the rotation of 76 exceeds the set angle Dα1. Shifting from zero torque control to rotational speed control so that the rotational speed of the drive motor 20 is matched with NO.

  In the third step, the slide shaft 72 is held in the neutral region at time t3 when it is confirmed that the rotation amount of the shift spindle 100 has reached the set rotation amount Sα while the slide shaft 72 is in the neutral region. The shift motor 85 is operated so as to return the shift spindle 100 to the reference position. That is, when the shift motor 85 is rotated forward to rotate the shift spindle 100 from the reference position in the first step, the shift motor 85 is reversed at time t3. At this time, since the shift drum 100 and the shift arm 86 are urged toward the reference position side by the pinching spring 107, the shift spindle 100 is quickly referred to by the rotation of the shift motor 85 and the urging force of the pinching spring 107. Can be returned to position.

  In a fourth step, after confirming that the shift spindle 100 has returned to the reference position, it becomes a switching target at time t4 corresponding to confirming that the rotational speed of the drive motor 20 is the target rotational speed. The shift motor 85 is operated to drive the slide shaft 72 toward the speed change area (the second speed change area A2 when shifting from the first speed to the second speed).

  In the fifth step, the engaging portion 73 is brought into contact with the switching portion to be switched (the locking portion 47a when shifting from the first speed to the second speed) among the plurality of the locking portions 46a to 48a. The operation of the shift motor 85 is confirmed at a time t5 when it is confirmed that the shift drum 75 has rotated to the contact rotation position based on detecting that the shift drum 76 has rotated beyond the set angle Dα2. Control for decreasing the moving speed of the slide shaft 72 by decreasing the speed is started. At this time, the operating speed of the shift motor 85 is reduced at least one of brake and duty control.

  In the sixth step, the shift drum 75 is rotated beyond the set angle Dα3 to indicate that the shift drum 75 has been rotated to the rotation position where the engaging portion 73 is engaged with the switching portion to be switched. At time t6 confirmed based on the detection of the movement, the load of the drive motor 20 is returned to the load before starting the first step, and the process shifts to torque return control for maintaining the state.

  In the seventh step, the shift motor 85 is operated to return the shift spindle 100 to the reference position at time t7 when it is confirmed that the rotation amount of the shift spindle 100 has reached the set rotation amount Sα.

  Further, in the eighth step, the torque control of the drive motor 20 is shifted from the torque return control to the map control at the time t8 when the predetermined time T3 has elapsed from the time t7.

  Such automatic shift control is basically the same when shifting up from the second speed to the third speed and when shifting down.

  Next, the operation of this embodiment will be described. First to third speed drive gears 43, 44, 45 provided on the main shaft 41 to which power from the drive motor 20 is transmitted so as not to rotate relative thereto, and a counter shaft 42. Are engaged with the first to third speed driven gears 46, 47, and 48, which are supported so as to be relatively rotatable with each other, and the first to third speed driven gears 46 to 48 are engaged with each other. The slide shaft 72 that can selectively engage with the counter shaft 42 is inserted into the gear support portion 42a so as to be movable in the axial direction. Since the shift drum 75 to be driven is disposed so as to coaxially surround the slide shaft 72, the shaft drive member is disposed on the side of the end of the slide shaft 72. It is not necessary to secure a space, and since the direction of assembly of the slide shaft 72 and the shift drum 75 are the same, can be compact and assembled drives the slide shaft 72 in an easy structure.

  In addition, a guide pin 81 protruding from the slide shaft 72 in a direction orthogonal to the axis of the counter shaft 42 is provided on the slide shaft 72, and the shift drum is displaced in the axial direction in accordance with the rotation around the axis. Since the guide hole 82 for fitting the guide pin 81 is provided in 75, it is not necessary to secure a space for disposing the shift drum 75 other than the main shaft 41 and the counter shaft 42, and the main shaft 41, the counter shaft 42, and the shift The drum 75 can be arranged in a compact manner.

  A shift drive gear 87 that swings according to the shift operation of the driver and that rotates according to the shift arm 86 that also swings during automatic shift is engaged with a shift driven gear 88 provided on the outer periphery of the shift drum 75. Therefore, the shift drum 75 is transmitted to the shift drum 75 via the shift drive gear 87 and the shift driven gear 88 meshed with each other by using the shift drum drive mechanism similar to the conventional one. It can be rotated.

  A power transmission chamber 30 that houses first to third speed drive gears 43 to 45 and first to third speed driven gears 46 to 48, a shift arm 86, and a case 24 in which the drive motor 20 is supported. A transmission chamber 31 for accommodating the transmission drive gear 87 and the transmission driven gear 88 is formed, and the shift drum 75 is disposed across the power transmission chamber 30 and the transmission chamber 31, so that the power transmission chamber 30 and the transmission chamber 31 are arranged. The entire case 24 can be configured compactly with the gap therebetween.

  Further, the rotation position of the shift spindle 100 and the shift arm 86 is detected by the shift spindle rotation position detection means 125, and the rotation position of the shift drum 75 is detected by the shift drum rotation position detection means 126. Automatic shift can be performed by detecting the shift operation and completion of operation by the shift spindle rotation position detection means 125 and the shift drum rotation position detection means 126, respectively.

  The drive motor 20 is housed and fixed in a motor chamber 29 formed adjacent to the power transmission chamber 30 in the case 24, and includes a main shaft 41 and a speed change actuator 84 that rotates the shift drum 75. Since the plurality of shafts 85a, 92, 96, 100, 115, 121 are arranged at positions overlapping the drive motor 20 when viewed from the direction along the axis of the drive motor 20, the drive motor 20, the main shaft 41, and The transmission actuator 84 can be arranged in a compact manner.

  A right rear wheel WRR to which power from the countershaft 42 is transmitted is disposed on the outer side on the right side of the speed change chamber 31 so that the right rear wheel WRR can be braked and disposed in the wheel 66R of the right rear wheel WRR. A brake panel 67, which is a part of the drum brake BR, is supported by the tip of a protruding portion 28b protruding from the right cover member 28 of the case 24 toward the right rear wheel WRR, and the shifting of the slide shaft 72 is performed. Since the bottomed fitting hole 77 for slidably fitting the end portion on the chamber 31 side is formed in a part of the projecting portion 28b, the portion for supporting the end portion on the transmission chamber 31 side of the slide shaft 72 The case 24 can be configured in a compact manner without the need to provide a separate from the extending portion 28b.

  Further, a pawl 73 that selectively engages with the locking portions 46a to 48a of the first to third driven gears 46 to 48 is provided on the slide shaft 72. In the axial movement range of the slide shaft 72, The pawl 73 is not engaged with any of the first to third shift regions A1 to A3 in which the pawl 73 is selectively engaged with the engaging portions 46a to 48a and the engaging portions 46a to 48a. First and second neutral regions N1 and N2 arranged between the first to third shift regions A1 to A3 so as to be in a combined state are set, and the drive motor 20 and the shift motor 85 The control device 130 for controlling the operation starts the operation of the shift motor 85 so as to rotate the shift spindle 100 from the reference position in the first to fourth steps in the automatic shift, and drives the controller. The load of the motor 20 is cut, and the rotational speed of the drive motor 20 is controlled to the target rotational speed as the slide shaft 72 moves to the neutral region, and then the shift spindle 100 is held with the slide shaft 72 held in the neutral region. When the rotational speed of the drive motor 20 is the target rotational speed with the shift spindle 100 returned to the reference position, the slide shaft 72 is moved to the shift area to be switched, While the torque of the motor 20 is controlled, the slide shaft 72 is temporarily stopped in the neutral region, so that smooth automatic transmission can be performed even if no clutch is provided between the drive motor 20 that is a drive source and the main shaft 41. Become.

  Further, in the fifth to sixth steps following the fourth step, when the slide shaft 72 moves from the neutral region, the control device 130 sets the pole 73 to the locking portion to be switched among the locking portions 46a to 48a. Since the shift shock is reduced by lowering the moving speed of the slide shaft 72 when the contact is made, and the load of the drive motor 20 is restored in response to the engagement of the pawl 73 with the engaging portion to be switched. Smooth automatic switching is possible.

  Furthermore, since the load of the drive motor 20 is cut at a predetermined time T2 from the start of the operation of the shift motor 85 in the first step, automatic shifting is performed without impairing the running feeling of the vehicle. It can be carried out.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. Is possible.

DESCRIPTION OF SYMBOLS 20 ... Drive motor 21 which is a drive source ... Transmission 41 ... Main shaft 42 ... Counter shaft 42a ... Gear support parts 43, 44, 45 ... Drive gears 46a, 47a, 48a ··· Locking portion 72 ··· Slide shaft 73 ··· Pole 75 that is an engaging portion ··· Shift drum 84 · Shifting actuator 85 · Shift motor 100 that is a power source for shifting Shift spindle 107 ... Clipping spring 125 ... Shift spindle rotation position detection means 126 ... Shift drum rotation position detection means 130 ... Control device 132 ... Vehicle speed detection means 133 ... Number of rotations Detecting means 134 Accelerator operation amount detecting means WRL ... Left rear wheel WRR as drive wheel ... Right rear wheel as drive wheel

Claims (4)

  1.   A main shaft (41) to which power from the drive source (20) is transmitted, a plurality of drive gears (43, 44, 45) provided on the main shaft (41) so as not to be relatively rotatable, and the main shaft (41) ) And a countershaft (42) linked to and connected to the drive wheels (WRL, WRR) and a plurality of the drive gears (43 to 45) individually meshed with the countershaft (42) Are selectively engaged with a plurality of driven gears (46, 47, 48) supported so as to be relatively rotatable with each other and locking portions (46a, 47a, 48a) of the plurality of driven gears (46-48), respectively. A slide shaft (72) that has an engaging portion (73) that is inserted into the counter shaft (42) so as not to rotate relative to the counter shaft (42), and to move in the axial direction. Shift drum (75) that can be rotated to drive in the direction, shift power source (85) that can rotate forward and reverse, and shift spindle (100) that rotates in response to the operation of the shift power source (85) ) And a shift actuator (84) that drives the shift drum (75) to rotate by one shift speed according to the reciprocating rotation of the shift spindle (100), and a plurality of the driven gears (46 to 46). 48) each of the engaging portions (73a) of the slide shaft (72) to be engaged with the engaging portions (46a to 48a) of the slide shaft (72a), and a plurality of the engaging portions ( 46a to 48a), the neutral region arranged between the plurality of speed change regions so that the engaging portion (73) is in a non-engaged state is the axis of the slide shaft (72). Direction In the vehicular transmission set in the enclosure, a shift spindle rotation position detecting means (125) for detecting the rotation position of the shift spindle (100) and a shift for detecting the rotation position of the shift drum (75). Drum rotation position detection means (126), vehicle speed detection means (132), rotation speed detection means (133) for detecting the rotation speed of the drive source (20), accelerator operation amount detection means (134), A control device (130) for controlling the operation of the drive source (20) and the shift power source (85) according to the detection values of the detection means (125, 126, 132, 133, 134), At the time of automatic shifting, the control device (130) moves the shift spindle (100) from the reference position in response to the drive source (20 rotational speed deviating from the set rotational speed continuously for a predetermined time). A first step of starting the operation of the power source for shifting (85) to rotate and cutting the load of the drive source (20), and the shift drum until the slide shaft (72) enters a neutral region. The rotational speed of the drive source (20) is controlled to a target rotational speed determined based on the detection values of the rotational speed detection means and the accelerator operation amount detection means in accordance with confirmation that (75) has rotated. In response to confirming that the amount of rotation of the shift spindle (100) has reached the set amount of rotation with the slide shaft (72) in the neutral region. A third step of operating the speed change power source (85) so as to return the shift spindle (100) to the reference position while maintaining the position in the neutral region; and After confirming that the spindle (100) has returned to the reference position, it is subject to switching among the plurality of shift regions in accordance with confirming that the rotational speed of the drive source (20) is the target rotational speed. A vehicle transmission apparatus, comprising: a fourth step of operating the shift power source (85) to drive the slide shaft (72) toward the shift region side in this order.
  2.   After the control device (130) executes the fourth step, the rotational position where the engaging portion (73) contacts the switching target locking portion among the plurality of locking portions (46a to 48a). The fifth step of reducing the moving speed of the slide shaft (72) by reducing the operating speed of the power source for shifting (85) in response to confirming that the shift drum (75) has rotated until In response to confirming that the shift drum (75) has rotated to the rotation position where the engagement portion (73) engages with the engaging portion to be switched. The vehicular transmission according to claim 1, wherein a sixth step of returning the load to a load before starting the first step and maintaining the state is sequentially executed.
  3.   The transmission for a vehicle according to claim 1, further comprising a spring (107) that biases the shift spindle (100) toward a side where the shift spindle (100) returns to a reference position.
  4.   The controller (130) cuts the load of the drive source (20) at a predetermined time interval from the start of the operation of the speed change power source (85) in the first step. The vehicle transmission device according to any one of claims 1 to 3.
JP2013071757A 2013-03-29 2013-03-29 Vehicle transmission Active JP6000178B2 (en)

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JP4447070B2 (en) * 1999-05-25 2010-04-07 アイシン・エーアイ株式会社 Shift control device for transmission
JP4051946B2 (en) * 2002-02-06 2008-02-27 三菱ふそうトラック・バス株式会社 Shift control device and shift control method for mechanical automatic transmission
JP4109904B2 (en) * 2002-05-31 2008-07-02 本田技研工業株式会社 Power unit for small vehicles
JP4895116B2 (en) * 2007-03-06 2012-03-14 本田技研工業株式会社 Automatic transmission

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