JP2005090621A - Reverse mal-shift prevention device of manual transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a small-sized and thin-walled reverse mal-shift prevention device capable of preventing the direct shifting from an advance speed gear stage to a reverse speed gear stage. <P>SOLUTION: This reverse mal-shift prevention device of a manual transmission having the advance speed gear stage and the reverse speed gear stage disposed on both sides of a select position comprises a plate member extended from a shift arm, a cam member disposed at the front of the plate member in the rotating direction and rotated about an axis in the direction intersecting with the axis of a shift and select shaft, and an energizing means energizing the cam member to a neutral position in the rotating direction. A projected part in contact with the plate member is formed on the cam member. The projected part comprises a restraint surface restraining the movement of the shift arm to the reverse speed gear stage by coming into contact with the plate member when the shift arm is moved from the advance speed gear stage to the reverse speed gear stage and a sloped surface allowing the movement of the plate member when the shift arm is moved from the reverse speed gear stage to the advance speed gear stage. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

  The present invention relates to a reverse misshift prevention device for a manual transmission, and more particularly, to a manual transmission capable of making a reverse missshift prevention device for preventing a direct shift from a forward gear position to a reverse gear position into a small and thin structure. The present invention relates to a reverse miss shift prevention device.

  The vehicle is provided with a manual transmission or an automatic transmission in order to change the driving force of the engine as required according to the traveling conditions. The manual transmission has a multi-stage transmission gear train. By changing the gear train by operating the shift lever and meshing the gears of each stage, the driving force of the engine is converted as required according to the driving conditions. And take it out.

  Some of such manual transmissions include a reverse miss shift prevention device that prevents a direct shift from the forward gear to the reverse gear. As a reverse shift prevention device for a manual transmission, there are those shown in FIGS. In FIG. 16, 302 is a manual transmission, and 304 is a transmission case. The transmission case 304 includes an upper case 306, a lower case 308, and an extension case 310. The transmission case 304 is provided with an input shaft 312, a main shaft 314 coaxial with the input shaft 312, an input shaft 312 and a counter shaft 316 parallel to the main shaft 314, and a main shaft 314 and a counter shaft 316. The reverse idler shaft 318 is fixed in parallel with the shaft.

  The manual transmission 302 is provided with an input gear train 320 and first to fifth gear trains 322 to 328 between the main shaft 314 and the counter shaft 316, and reverse between the main shaft 314 and the counter shaft 316 and the reverse idler shaft 318. A gear train 330 is provided. The main shaft 314 is provided with a first-speed / second-speed switching mechanism 332 between the first-speed gear train 322 and the second-speed gear train 324, and between the third-speed gear train 326 and the input gear train 320, A speed switching mechanism 334 is provided, and a fifth speed / reverse switching mechanism 336 is provided between the fifth speed gear train 328 and the reverse gear train 330. Each of the switching mechanisms 332 to 336 includes a first speed / second speed switching sleeve 338, a third speed / fourth speed switching sleeve 340, and a fifth speed / reverse switching sleeve 342, respectively.

  Each switching mechanism 332 to 336 is switched by a shift mechanism 344. The shift mechanism 344 is provided in the transmission case 304 by holding the first speed / second speed shift shaft 346, the third speed / fourth speed shift shaft 348, and the fifth speed / reverse shift shaft 350 so as to be movable in the axial direction. The first speed / second speed shift shaft 346 has a first speed position on one side in the shift direction and a second speed position on the other side in the shift direction across the select position. The third speed / fourth speed shift shaft 348 has a third speed position on one side in the shift direction and a fourth speed position on the other side in the shift direction. The 5-speed / reverse shift shaft 350 has a 5-speed position on one side in the shift direction and a reverse position on the other side in the shift direction across the select position. The shift shafts 346 to 350 are respectively provided with a first speed / second speed shift fork 352, a third speed / fourth speed shift fork 354, and a fifth speed / reverse shift fork 356 which are respectively engaged with the switching sleeves 338 to 342. Yes.

  Each of the shift shafts 346 to 350 is provided with a first speed / second speed shift yoke 358, a third speed / fourth speed shift yoke 360, and a fifth speed / reverse shift yoke 362 in the extension case 310, respectively. The lever housing 364 attached to the extension case 310 is provided with a shift and select shaft 366 supported so as to be rotatable about the axis and slidable in the axial direction. The shift and select shaft 366 is provided with a shift arm 368 engaged with any one of the shift yokes 358 to 362.

  The shift mechanism 344 engages the shift claw portion 370 of the shift arm 368 with any one of the shift yokes 358 to 362 by rotating the shift-and-select shaft 366 around the axis by selecting a shift lever (not shown). The shift-and-select shaft 366 is slid in the axial direction by the shift operation of the shift lever, and any one of the shift shafts 346 to 350 is shifted by the shift arm 368 from the first gear position to the fifth gear position which is the shift position. The input gear train 320, the 1st to 5th gear trains 322 to 328, and the reverse gear train 330 are switched.

  The manual transmission 302 is provided with a reverse misshift prevention device 372. As shown in FIGS. 17 to 19, the reverse misshift prevention device 372 is provided with a regulating member 374 extending in parallel to the axial direction of the shift and select shaft 366 on the lever housing 364, and the shift and select shaft 366 is an interface that is a cam member. A lock cam 376 is supported and provided by a pin 378 and a pin groove 380 so that the lock cam 376 can be rotated around the axis by a certain angle and can move in the axial direction by a certain distance. The interlock cam 376 is provided with a latching portion 382 that is latched / removed by the regulating member 374, and pushes the interlock cam 376 from the fifth speed position side toward the reverse position side and regulates the latching portion 382. A spring 384 is provided as a biasing means that biases the member 374 so as to be locked.

  When the shift lever of the shift mechanism 344 is selected from the neutral position to the 5th speed position and the select position on the reverse position side, the reverse misshift prevention device 372 is operated by the biasing force of the spring 384 as shown by the solid line in FIGS. The locking portion 382 of the lock cam 376 is locked to the side surface of the restriction member 374. When the reverse misshift prevention device 372 is operated to shift the shift lever from the select position to the fifth speed position, the locking portion 382 is unlocked from the side surface of the regulating member 374 and rotated by the biasing force of the spring 384. As shown by a two-dot chain line in FIG. 17, it is opposed to the tip of the regulating member 374.

  In the reverse miss shift prevention device 372, when the shift lever is to be directly shifted from the fifth gear position to the reverse position, the locking portion 382 of the interlock cam 376 contacts the tip of the regulating member 374 and the movement is restricted. And the spring 384 is compressed to prevent shifting to the reverse position.

  When the reverse misshift prevention device 372 selects the shift lever from the fifth gear position and the reverse position side select position once to the first gear position and the second gear position neutral position, the locking portion 382 of the interlock cam 376 is moved. The contact with the front end of the regulating member 374 is released, and is locked to the side surface of the regulating member 374 by the biasing force of the spring 384. From this state, the shift lever can be shifted to the reverse position by selecting from the neutral position to the fifth speed position and the select position on the reverse position side and shifting to the reverse position.

As a reverse miss shift prevention device of such a manual transmission, a reverse gate plate that performs sliding in the shift direction and sliding in the select direction with respect to the guide plate having the select guide groove and the shift guide groove, By urging it to a predetermined position by a dedicated spring in accordance with this movement, the reverse gate plate is stably operated, and it is possible to more reliably perform a misshift while ensuring that the desired shift selection is performed. There is something to prevent.
Further, as a reverse miss shift prevention device for a manual transmission, when the shift operation is performed from the first forward speed to the reverse speed without performing the selection operation, the stopper bracket fixed to the transmission case and the stopper bracket are directed. Some end portions are formed in a bifurcated shape, and the shift and select shaft slides to the second forward stage by the action of the stopper plate, thereby preventing a misshift to the reverse stage.
Further, as a reverse misshift prevention device for a manual transmission, a cam mounted on a shift and select lever, a mover mounted on a bar member of a lever case via a restraining spring, and a first positioning where the cam is contacted And a second positioning portion with which the moving element is brought into contact may prevent a shift operation from the fifth speed position to the reverse position.
No. 7-33010 JP-A-7-224933 JP-A-8-42688

  However, in the conventional reverse miss shift prevention device shown in FIGS. 16 to 19, the lever housing is provided with a restricting member extending parallel to the axial direction of the shift and select shaft, so that the shift and shift in the longitudinal direction in the lever housing is achieved. There is a problem of requiring a space for disposing a regulating member separately from the select shaft, and the shift and select shaft supports an interlock cam that can be rotated around the axis and moved in the axial direction separately from the shift arm. Therefore, an operating space for rotating the locking portion of the interlock cam around the axis and an operating space for moving in the axial direction are required in the width direction and the thickness direction in the lever housing. There is a problem to do.

  For this reason, in the conventional reverse miss shift prevention device, there is a disadvantage that the structure becomes longer because it becomes longer in the axial direction of the shift and select shaft and also in the width direction and the thickness direction.

  The present invention is a shift and select shaft that is supported by a lever housing and rotated around an axis line by a select operation and slid in an axial direction by a shift operation, and a shift arm attached to the shift and select shaft, A plurality of shift shafts engaged with the shift arm and moved in the shift direction, and one of the plurality of shift shafts has a forward gear position on one side of the shift direction with the select position interposed therebetween. In a reverse miss shift prevention device for a manual transmission that is disposed and a reverse gear position is disposed on the other side in the shift direction, a plate member that extends from the shift arm in a radial direction of the shift and select shaft, and Rotation of the plate member that rotates around the axis when the shift arm moves to the forward position and the select position on the reverse position side A cam member that is disposed at the front side of the plate and is abutted against the rotating plate member and rotated about an axis that intersects the axis of the shift and select shaft, and a neutral position of the cam member in the rotational direction. Urging means for urging the cam member, and the cam member is formed with a protrusion abutting against the plate member, and the shift arm is moved from the forward gear position to the reverse gear position on the protrusion. A restricting surface that abuts the plate member that moves in the axial direction when moving and restricts movement to the reverse step position, and an axial direction when the shift arm moves from the reverse step position to the forward step position And an inclined surface that allows movement of the plate member that moves to the right.

The reverse miss shift prevention device of the present invention includes a plate member attached to the shift arm and extending in the radial direction of the shift and select shaft, and when the shift arm moves to the select position between the forward gear position and the reverse gear position. A cam member that is disposed at a front position in the rotation direction of the plate member that rotates around the axis and that rotates about an axis that is in contact with the rotating plate member and intersects the axis of the shift and select shaft; And a biasing means for biasing the cam member to a neutral position in the rotational direction.When the shift operation is directly performed from the forward gear position to the reverse gear position, a regulating surface and a slope formed on the cam member are provided. The plate member is brought into contact with the projecting portion provided with a restriction to restrict the movement to the reverse position, thereby shifting the plate member, the cam member, and the urging means, which are constituent members. It can be arranged compactly in the radial direction of the deselect shaft, and since the cam member only rotates a small angle around the axis around the neutral position during operation, the operating space of the cam member can be reduced. .
Therefore, the reverse miss shift prevention device for a manual transmission according to the present invention can have a small and thin structure for the reverse miss shift prevention device for preventing a direct shift from the forward gear position to the reverse gear position.

The reverse miss shift prevention device of the present invention uses a shift arm, which is an existing member of a manual transmission, to arrange components compactly and reduce the operating range of the components to make the structure small and thin. It is.
Embodiments of the present invention will be described below with reference to the drawings.

  1 to 13 show a first embodiment of the present invention. In FIG. 13, 2 is a manual transmission and 4 is a transmission case. The transmission case 4 includes an upper case 6, a lower case 8, and an extension case 10. The transmission case 4 is provided with an input shaft 12, a main shaft 14 coaxial with the input shaft 12, and an input shaft 12 and a counter shaft 16 parallel to the main shaft 14, and a main shaft 14 and a counter shaft 16. The reverse idler shaft 18 is provided in a fixed manner.

  The manual transmission 2 is provided with an input gear train 20 and first to fifth gear trains 22 to 28 between the main shaft 14 and the counter shaft 16, and reverse between the main shaft 14 and the counter shaft 16 and the reverse idler shaft 18. A gear train 30 is provided. The main shaft 14 is provided with a first-speed / second-speed switching mechanism 32 between the first-speed gear train 22 and the second-speed gear train 24, and between the third-speed gear train 26 and the input gear train 20, A speed switching mechanism 34 is provided, and a fifth speed / reverse switching mechanism 36 is provided between the fifth speed gear train 28 and the reverse gear train 30. Each of the switching mechanisms 32 to 36 has a first speed / second speed switching sleeve 38, a third speed / fourth speed switching sleeve 40, and a fifth speed / reverse switching sleeve 42, respectively.

  The switching mechanisms 32 to 36 are switched by the shift mechanism 44. The shift mechanism 44 is provided in the transmission case 4 by holding the first speed / second speed shift shaft 46, the third speed / fourth speed shift shaft 48, the fifth speed / reverse shift shaft 50 so as to be axially movable. The first-speed / second-speed shift shaft 46 has a first-speed position on one side in the shift direction and a second-speed position on the other side in the shift direction across the select position. The third speed / fourth speed shift shaft 48 has a third speed position on one side in the shift direction and a fourth speed position on the other side in the shift direction. The fifth speed / reverse shift shaft 50 has a fifth speed position on one side in the shift direction across the select position and a reverse position on the other side in the shift direction.

  The shift shafts 46 to 50 are respectively provided with a first speed / second speed shift fork 52, a third speed / fourth speed shift fork 54, and a fifth speed / reverse shift fork 56 which are respectively engaged with the switching sleeves 38 to 42. Yes. Each of the shift shafts 46 to 50 is provided with a first speed / second speed shift yoke 58, a third speed / fourth speed shift yoke 60, and a fifth speed / reverse shift yoke 62 in the extension case 10, respectively.

  A lever housing 64 is attached to the extension case 10. As shown in FIGS. 1 to 3, the lever housing 64 is formed in a closed and bottomless rectangular box shape by a substantially square frame-shaped peripheral wall portion 66 and an upper wall portion 68 covering the upper side of the peripheral wall portion 66. Yes. Supporting boss portions 70 and 72 are provided on the peripheral wall portion 66 facing the lever housing 64 in the front-rear direction, and a support hole 74 and a support hole 76 are formed. A shift and select shaft 78 is supported in the support hole 74 and the support hole 76 so as to be rotatable about the axis and slidable in the axial direction.

  The shift and select shaft 78 protruding outside from the support hole 76 is connected to a shift lever (not shown). As shown in FIG. 8, the shift lever is selected and shifted in the select direction and the shift direction intersecting each other around the neutral position, and the shift and select shaft 78 supported by the lever housing 64 by the select operation is moved around the axis. The shift and select shaft 78 is slid in the axial direction by rotating and shifting. This shift lever has a 1st speed position and a 2nd speed position selection position on one side of the selection direction across the neutral position, and a 5th speed position and a reverse position side selection position on the other side of the selection direction. The first speed position is provided on one side of the shift direction from the select position on the second speed position side, the second speed position is provided on the other side of the shift direction, the third speed position is provided on the one side of the shift direction from the neutral position, and the other side of the shift direction is provided. A shift pattern is provided in which a fourth speed position is provided, a fifth speed position is provided on one side in the shift direction from the select position on the fifth speed position and the reverse position side, and a reverse position is provided on the other side in the shift direction.

  As shown in FIG. 2, the shift mechanism 44 is provided with a neutral position groove 82, one side shift position groove 84, and the other side shift position groove 86 on the shift and select shaft 78 in the support hole 74 as a shift direction positioning mechanism 80. It is formed and provided. A positioning boss 88 is provided on the peripheral wall 66 adjacent to each of the grooves 82 to 86, and a positioning hole 90 is formed in the positioning boss 88. In the positioning hole 90, a ball 94 urged toward the grooves 82 to 86 by a spring 92 is accommodated. The positioning mechanism 80 elastically engages the balls 94 with the grooves 82 to 86 by the urging force of the spring 92, and fixes the shift and select shaft 78 at a predetermined mode in the neutral position, the one side shift position, and the other side shift position. To do.

  The shift and select shaft 78 is provided with a shift arm 96 that is engaged with any one of the shift yokes 58 to 62 and moves the shift shafts 46 to 50 in the shift direction. The shift arm 96 is provided with a cylindrical arm base 98 that is fitted to the shift and select shaft 78, and the shift claw portion 100 that is engaged with any one of the shift yokes 58 to 62 on the arm base 98. Is provided. The shift arm 96 is provided by fitting the arm base 98 to the shift and select shaft 78 and penetrating the fixing pin 102 so that the shift claw portion 100 is directed below the shift and select shaft 78 and mounted. .

  The shift arm 96 is provided with a guide boss 104 that protrudes from one side of the arm base 98 toward the peripheral wall 66 on one side of the lever housing 64, and a shift corresponding to the shift pattern is provided at the tip of the guide boss 104. A guide groove 106 is formed and provided. The shift guide groove 106 is composed of a first speed position to a fifth speed position and a reverse position corresponding to the shift pattern of the shift lever. The first speed position and the second speed position, the third speed position and the fourth speed position, the fifth speed position and the reverse position. Are arranged so as to face each other linearly.

  A screw boss portion 108 is provided in the peripheral wall portion 66 of the lever housing 64 facing the shift guide groove 106, and a screw hole 110 is formed. A bolt-shaped shift guide member 112 is screwed into the screw hole 110, and a shift guide protrusion 114 at the tip of the shift guide member 112 is provided to engage with the shift guide groove 106. The shift and select shaft 78 is guided in the shift operation by the engagement between the shift guide groove 106 of the shift arm 96 and the shift guide protrusion 114 of the shift guide member 112.

  The shift and select shaft 78 is provided with a substantially U-shaped interlock plate 116 so as to straddle the arm base 98 below the shift arm 96. The interlock plate 116 includes a one-side protruding portion 118 on the support hole 74 side, an other-side protruding portion 120 on the support hole 76 facing the one-side protruding portion 118 with the arm base 98 interposed therebetween, and below the arm base 98. It is comprised from the connection part 122 which connects the one side protrusion part 118 and the other side protrusion part 120. FIG.

  The one side protruding portion 118 and the other side protruding portion 120 are provided with a one side insertion hole 124 and a second side insertion hole 126 through which the shift and select shaft 78 is slidably inserted. The connecting portion 122 is provided with an arm insertion hole 128 oriented in the axial direction of the shift and select shaft 78. The arm insertion hole 128 is inserted with the shift claw portion 100 of the shift arm 96 to prevent the shift claw portion 100 from rotating around the axis of the shift-and-select shaft 78 and to allow movement in the axial direction. The connecting portion 122 is provided with a pair of protective portions 130 and 130 protruding from both sides in the width direction toward the shift claw portion 100 of the shift arm 96 protruding from the arm insertion hole 128.

  The interlock plate 116 does not follow the movement of the shift and select shaft 78 in the shift direction (axial direction), allows the shift arm 96 to move in the shift direction (axial direction), and selects the shift and select shaft 78. It follows only in the direction (around the axis) and rotates with the shift arm 96 in the select direction (around the axis).

  As shown in FIG. 3, the shift mechanism 44 is an interlock on the side facing the peripheral wall 66 on the other side of the lever housing 64 as a position fixing mechanism 132 for fixing the shift and select shaft 78 to the neutral position at a predetermined moderation. A position fixing recess 134 is formed in the one side protruding portion 118 of the plate 116. A position fixing boss 136 is integrally formed on the peripheral wall 66 and the upper wall 68 on the other side of the lever housing 64 adjacent to the position fixing recess 134, and is fixed to the position fixing boss 136. A hole portion 138 is formed and provided. A ball 142 that is urged toward the position fixing recess 134 by the spring 140 is accommodated in the position fixing hole 138. The position fixing mechanism 132 elastically engages the ball 142 with the position fixing recess 134 of the interlock plate 116 by the urging force of the spring 140, and fixes the shift and select shaft 78 to the neutral position with a predetermined moderation.

  The shift mechanism 44 rotates the shift and select shaft 78 around the axis by selecting the shift lever to engage the shift claw portion 100 of the shift arm 96 with any one of the shift yokes 58 to 62. The shift-and-select shaft 78 is slid in the axial direction while guiding the shift operation by the engagement between the shift guide groove 106 of the shift arm 96 and the shift guide protrusion 114 of the shift guide member 112 by the shift operation of the shift lever. The shift arm 96 moves any one of the shift shafts 46 to 50 from the first gear position to the fifth gear position or the reverse gear position of the reverse gear position, which is the shift position. The fifth gear train 22 to 28 and the reverse gear train 30 are switched.

  The manual transmission 2 is provided with a reverse misshift prevention device 144. As shown in FIG. 1, the reverse miss shift prevention device 144 includes a plate member 146 extending from the shift arm 96 in the radial direction of the shift-and-select shaft 78, and the fifth speed position and the reverse speed position where the shift arm 96 is the forward gear position. When the plate member 146 that rotates around the axis of the shift-and-select shaft 78 is moved to the select position on the reverse position side, which is the position, the plate member 146 is disposed at the front position in the rotation direction and is in contact with the rotating plate member 146 to shift. A cam member 148 rotated about an axis C2 in a direction intersecting the axis C1 of the AND select shaft 78, and a spring 150 serving as an urging means for urging the cam member 148 to a neutral position in the rotation direction are provided. Yes.

  As shown in FIG. 3, the plate member 146 protrudes in a flat plate shape from the lower end of the guide boss 104 of the shift arm 96 toward the peripheral wall 66 on one side of the lever housing 64 where the shift guide member 112 is provided. It is provided.

  As shown in FIG. 4, the cam member 148 is provided with a mounting hole 154 formed in the center of a disc-shaped cam base portion 152, and a pair of engaging portions 156 and 156 are spaced from the peripheral edge in the radial direction of the cam base portion 152. Protrusions 158 that are in contact with the plate member 146 are formed on the outer side of one of the engaging portions 156 and are provided so as to protrude in parallel with a distance of D.

  The protrusion 158 is formed in a substantially right triangle shape, and includes a regulation surface 160 and an inclined surface 162. When the shift arm 96 moves from the fifth speed position, which is the forward gear position, to the reverse position, which is the reverse gear position, the restriction surface 160 comes into contact with the plate member 146 that moves in the axial direction of the shift and select shaft 78, The movement of the shift arm 96 to the reverse position is restricted. The slope 162 allows the movement of the plate member 146 that moves in the axial direction of the shift-and-select shaft 78 when the shift arm 96 moves from the reverse position to the fifth speed position.

  The restriction surface 160 includes a first restriction surface 160-1 and a second restriction surface 160-2. When the shift arm 96 moves from the fifth speed position to the reverse position, the first restriction surface 160-1 comes into contact with the reverse position side facing surface 146a of the plate member 146 that moves in the axial direction of the shift and select shaft 78 and reverse. The second restricting surface 16-2 comes into contact with the select position side facing surface 146b orthogonal to the position side facing surface 146a.

  As shown in FIG. 5, the spring 150 is a torsion spring including a winding portion 164 and a pair of free end portions 166 and 166 extending from both ends of the winding portion 164 in the winding direction. The spring 150 has a winding portion 164 attached to a rotating shaft 192, which will be described later, and free end portions 166, 166 respectively inside a pair of engaging portions 156, 156 of the cam member 148 and inside a locking hole 198, which will be described later. Set a bullet.

  The cam member 148 and the spring 150 are mounted on a substantially U-shaped fixing lever 168 surrounding the shift arm 96.

  As shown in FIGS. 1 and 2, the fixing lever 168 has a one-side arm 170 on the support hole 74 side of the lever housing 64 and a one-side arm 170 from the one-side protruding portion 118 of the interlock plate 116. The arm base 98 faces the other side of the interlock plate 116 and the other side arm 172 of the lever housing 64 on the support hole 76 side than the other protrusion 120 of the interlock plate 116, and the lever housing 64 provided with the shift guide member 112. It is comprised from the connection part 174 which connects the one side arm part 170 and the other side arm part 172 in the surrounding wall part 66 side of one side.

  As shown in FIGS. 6 and 7, the one side arm 170 and the other side arm 172 are provided with a one side through hole 176 and another side through hole 178. The one side through-hole 176 is provided with a cylindrical portion 180 extending toward the other side arm portion 172, and an annular ring slidably inserted into the cylindrical portion 180 to support it. A one-side support portion 182 is attached. The other side through hole 178 is provided with an annular other side support portion 184 that is slidably inserted and supported by the shift and select shaft 78. The connecting portion 174 is provided with a through hole 186 at a position corresponding to the shift guide member 112. The through hole 186 is provided with a rotation restricting portion 188 in the middle of the shift guide member 112 that is a rotation restricting member.

  As a result, the fixed lever 168 is formed in a substantially U shape surrounding the shift arm 96, and the one arm part 170 and the other arm part 172 at both ends are pivotally supported by the shift and select shaft 78. The rotation is restricted by the shift guide member 112 functioning as a rotation restricting member disposed in the lever housing 64, and the position of the shift and select shaft 78 in the axial direction is determined. Further, the interlock plate 116 shifts by causing the one-side protruding portion 118 to abut against the cylindrical portion 180 of the one-side arm portion 170 and the other-side protruding portion 120 to contact the other-side arm portion 172. The position of the AND select shaft 78 in the axial direction is determined.

  The connecting portion 174 of the fixed lever 168 is provided with a notch 190 that allows the plate member 146 to rotate and move in the axial direction on the side facing the plate member 146. A rotating shaft 192 having an axis C2 in a direction intersecting with the axis C1 of the shift and select shaft 78 is fixed to the side of the connecting portion 174 facing the peripheral wall 66 by a fixing pin 196 inserted into the fixing hole 194. A locking hole 198 having a width of a constant interval D is formed in the vicinity of the rotating shaft 192.

  The rotating shaft 192 is provided with the cam member 148 rotatably supported thereon and the spring 150 attached thereto. The cam member 148 aligns the inside of the pair of engaging portions 156 and 156 with the inside of the locking hole 198 and positions the projection 158 in the notch 190 of the connecting portion 174 so that the mounting hole 154 has a rotation shaft. Inserted through 192. The spring 150 is mounted with the free end portions 166 and 166 elastically contacting the inner sides of the engaging portions 156 and 156 and the inner side of the locking hole 198, and the rotating shaft 192 is inserted into the winding portion 164. . The cam member 148 is urged to the neutral position in the rotational direction by the urging force of the spring 150 provided in the engaging portions 156 and 156.

  Further, as shown in FIG. 1, the shift mechanism 44 has a one-side protruding portion of the interlock plate 116 on the side facing the connecting portion 174 of the fixed lever 168 as a return mechanism 200 for returning the shift and select shaft 78 to the neutral position. A rotation lever 202 that extends in the radial direction of the shift and select shaft 78 and rotates following the shift and select shaft 78 is provided at 118. An engaging portion 204 extending toward the one-side arm portion 170 of the fixed lever 168 is provided at the tip of the rotating lever 202. A stopper portion 206 extending toward the rotation lever 202 in parallel with the tube portion 180 is provided on the one arm portion 170 of the fixed lever 168 closer to the shift and select shaft 78 than the engaging portion 204. ing. The cylindrical portion 180 is provided with a return spring 208 that urges the rotary lever 202 toward the neutral position.

  The return spring 208 includes a winding portion 210 and a pair of free ends 212 and 212 extending from both ends of the winding portion 210 in the winding direction. The winding portion 210 is attached to the cylindrical portion 180 and is free at the neutral position. The end portions 212 and 212 are elastically contacted so as to be sandwiched from both sides of the engaging portion 204 at the tip of the rotary lever 202 and the stopper portion 206 extending from the one-side arm portion 170, respectively. The return mechanism 200 follows the shift and select shaft 78, and when the rotation lever 202 of the interlock plate 116 rotates from the neutral position to the select position side, one of the free ends 212 and 212 of the return spring 208 is It is elastically deformed, and the shift and select shaft 78 is urged to return to the neutral position via the rotating lever 202 by the urging force of one elastically deformed free end portion 212.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 9, in the reverse miss shift prevention device 144, the plate member 146 provided on the shift arm 96 fixed to the shift and select shaft 78 is spaced apart from the protrusion 158 of the cam member 148 in the neutral position. doing.

  When the shift lever of the shift mechanism 144 is selected from the neutral position to the fifth speed position and the select position on the reverse position side, the reverse miss shift prevention device 144 follows the shift and select shaft 78 as shown in FIG. The 96 plate members 146 rotate around the axis and come into contact with the protrusions 158 of the cam member 148 disposed at the front position in the rotation direction, so that the cam member 148 in the neutral position is resisted against the biasing force of the spring 150. Rotate in the direction.

  When the shift lever is shifted from the select position to the fifth speed position, the reverse miss shift prevention device 144 moves the shift and select shaft 78 in the axial direction as shown in FIG. 11, and the plate member 146 is the protrusion of the cam member 148. The cam member 148 is released from the contact with 158 and rotated in the other direction by the urging force of the spring 150 to return to the neutral position.

  When the reverse misshift prevention device 144 attempts to directly shift the shift lever from the fifth gear position to the reverse position, as shown in FIG. 12, the shift and select shaft 78 moves in the axial direction to reverse the plate member 146. The position-side facing surface 146a contacts the first restriction surface 160-1 of the projection 158 of the cam member 148 in the neutral position, thereby preventing the shift operation to the reverse position and prohibiting the shift operation to the reverse position.

  At this time, when the reverse misshift prevention device 144 further shifts the shift lever from the select position to the reverse position side, the reverse position side of the plate member 146 moved in the axial direction following the shift-and-select shaft 78. The opposing surface 146a presses the first restricting surface 160-1 of the protrusion 158 of the cam member 148 to rotate the cam member 148 in the other direction, and the rotation of the cam member 148 in the other direction causes the select position of the plate member 146 to move. The second regulating surface 160-2 of the projection 158 of the cam member 148 comes into contact with the side facing surface 146b, and the plate member 146 is pressed toward the neutral position side and rotated around the axis (see FIG. 4).

  As a result, after the shift and select shaft 78 is rotated around the axis and returned to the neutral position, the reverse misshift prevention device 144 disengages the plate member 146 from the protrusion 158 of the cam member 148, and reverses. The prohibition of shifting to the position is released.

  Further, when the shift lever is selected from the neutral position to the fifth speed position and the select position on the reverse position side, the reverse miss shift prevention device 144 follows the shift and select shaft 78 and causes the plate member 146 of the shift arm 96 to move around the axis. The cam member 148 in the neutral position is rotated in one direction against the urging force of the spring 150 by contacting the protrusion 158 of the cam member 148 disposed at the front position in the rotation direction.

  When the shift lever is shifted from the select position to the reverse position, the reverse miss shift prevention device 144 follows the shift and select shaft 78 and the plate member 146 moves in the axial direction, so that the cam member 148 releases the pressure and the cam. The member 148 is slightly rotated in the other direction by the biasing force of the spring 150 and returned to the neutral position side.

  When the shift lever is shifted from the reverse position to the fifth speed position, the reverse misshift prevention device 144 moves the shift and select shaft 78 in the axial direction so that the plate member 146 moves on the slope 162 of the protrusion 158 of the cam member 148. The plate member 146 is allowed to move by sliding.

  As described above, the reverse miss shift prevention device 144 of the manual transmission 2 includes the plate member 146 extended from the shift arm 96 and the plate member 146 that is disposed at the front position in the rotation direction of the plate member 146 and rotates. A cam member 148 that rotates in contact with it and a spring 150 that urges the cam member 148 to a neutral position in the rotational direction. When performing a shift operation directly from the fifth gear position to the reverse position, The plate member 146 that is a component member and the cam are controlled by bringing the plate member 146 into contact with a protrusion 158 having a regulating surface 160 and an inclined surface 162 formed on the cam member 148 and restricting the movement to the reverse position. The member 148 and the spring 150 can be arranged compactly in the radial direction of the shift and select shaft 78. Further, during operation the cam member 148 is only very small angular rotation around the axis around the neutral position, it is possible to reduce the working space of the cam member 148.

  Therefore, the reverse miss shift prevention device 144 of the manual transmission 2 can have a small and thin structure as the reverse miss shift prevention device 144 that prevents a direct shift from the fifth gear position to the reverse position.

  Further, the reverse miss shift prevention device 144 causes the regulating surface 160 of the cam member 148 to be placed on the reverse position side facing surface 146a of the plate member 146 that moves in the axial direction when the shift arm 96 moves from the fifth speed position to the reverse position. The first restricting surface 160-1 that abuts and the second restricting surface 160-2 that abuts the select position side facing surface 146b orthogonal to the reverse position side facing surface 146a.

  Accordingly, the reverse misshift prevention device 144 moves the plate member 146 from the fifth speed position to the reverse position beyond the select position by the first and second restriction surfaces 160-1 and 160-2 formed on the cam member 148. The plate member 146 can be returned from the select position to the neutral position, and the action of restricting the movement to the reverse position and the action of returning to the neutral position can be realized with a simple structure. And a small and thin structure can be realized.

  Further, the reverse miss shift prevention device 144 is formed in a substantially U shape surrounding the shift arm 96, and both ends of the reverse miss shift prevention device 144 are pivotally supported by the shift and select shaft 78 and are disposed in the lever housing 64. A fixed lever 168 whose rotation is restricted by a rotation restricting portion 188 of the shift guide member 112 which is a member is provided, and a rotating shaft 192 having an axis C2 in a direction intersecting the axis C1 of the shift and select shaft 78 is provided on the fixed lever 168. A cam member 148 is rotatably supported on the rotating shaft 192 and a spring 150 is mounted on the rotating shaft 192.

  Accordingly, the reverse miss shift prevention device 144 is provided with the rotation shaft 192, the cam member 148, and the spring 150 mounted on the fixed lever 168 supported by the shift and select shaft 78, so that the rotation shaft 192 and the cam for the plate member 146 are mounted. The assembly accuracy of the member 148 and the spring 150 can be improved, and the assembly workability can be improved.

  14 and 15 show a second embodiment. The reverse miss shift prevention device 144 of this embodiment includes a rotation shaft 192 and a shift and select shaft, in which a position fixing mechanism 132 for fixing the shift and select shaft 78 to a neutral position with a predetermined moderation is fixed to the connecting portion 174 of the fixing lever 168. 78.

  The position fixing mechanism 132 is provided by forming a position fixing recess 134 in the shift and select shaft 78 facing the axis C2 of the rotating shaft 192, and the position fixing mechanism 132 on the rotating shaft 192 that rotatably supports the cam member 148. The position fixing boss 136 is integrally formed, and the position fixing boss 136 is formed with a position fixing hole 138. A ball 142 that is urged toward the position fixing recess 134 by the spring 140 is accommodated in the position fixing hole 138. The rotating shaft 192 integrally formed with the position fixing boss 136 is inserted into the fixing hole 194 of the connecting portion 174, and the ball 142 at the tip of the position fixing boss 136 is inserted into the position fixing recess 134 of the shift and select shaft 78. And fixed by the fixing tool 214.

  This position fixing mechanism 132 elastically engages the ball 142 with the position fixing recess 134 of the shift and select shaft 78 by the urging force of the spring 140, thereby fixing the shift and select shaft 78 at the neutral position with a predetermined moderation. .

  Thus, the reverse misshift prevention device 144 of this embodiment is positioned between the rotary shaft 192 fixed to the fixed lever 168 facing the peripheral wall portion 66 on one side of the lever housing 64 and the shift and select shaft 78. By providing the fixing mechanism 132, the other side of the lever housing 64 is provided with respect to the position fixing mechanism 132 provided with the position fixing boss 136 on the peripheral wall 66 on the other side of the lever housing 64 shown in FIG. 3. The peripheral wall 66 can be moved closer to the shift and select shaft 78 side from the position indicated by the two-dot chain line to the position indicated by the solid line.

  For this reason, this reverse miss shift prevention apparatus 144 can make the width | variety of the left-right direction of the lever housing 64 small, and can make it a more compact structure.

  The reverse miss shift prevention device of the present invention uses a shift arm, which is an existing member of a manual transmission, to arrange components compactly and reduce the operating range of the components to make the structure small and thin. Therefore, the present invention can be applied to the miniaturization of the shift mechanism of the manual transmission.

It is a bottom view of the shift mechanism provided with the reverse miss shift prevention apparatus which shows the Example of this invention. It is sectional drawing by the II-II line of FIG. 1 which shows 1st Example. It is sectional drawing by the III-III line of FIG. 2 which shows 1st Example. It is a front view of the cam member which shows 1st Example. It is a front view of the spring which shows 1st Example. It is a front view of the fixed lever which shows 1st Example. It is sectional drawing by the VII-VII line of FIG. 6 which shows 1st Example. It is a figure which shows the shift pattern which shows 1st Example. It is a figure explaining the operation | movement at the time of neutral which shows 1st Example. It is a figure explaining the operation | movement at the time of select operation which shows 1st Example. It is a figure explaining the operation | movement at the time of shift operation to the 5th-speed position which shows 1st Example. It is a figure explaining the operation | movement at the time of the shift operation from the 5th speed position to a reverse position which shows 1st Example. It is sectional drawing of the manual transmission which shows 1st Example. It is a partially-omission bottom view of the shift mechanism provided with the reverse miss shift prevention apparatus which shows 2nd Example. It is sectional drawing by the XV-XV line | wire of FIG. 14 which shows 2nd Example. It is sectional drawing of the manual transmission which shows a prior art example. It is a partially broken top view of the shift mechanism provided with the reverse miss shift prevention apparatus which shows a prior art example. It is sectional drawing by the XVIII-XVIII line of FIG. 17 which shows a prior art example. It is a side view of the interlock cam which shows a prior art example.

Explanation of symbols

2 Manual transmission 4 Transmission case 20 Input gear train 22 1st gear train 24 2nd gear train 26 3rd gear train 28 5th gear train 30 Reverse gear train 32 1st & 2nd speed switching mechanism 34 3rd & 4th gear Switching mechanism 36 5-speed / reverse switching mechanism 44 Shift mechanism 46 1-speed / 2-speed shift shaft 48 3-speed / 4-speed shift shaft 50 5-speed / reverse shift shaft 58 1-speed / 2-speed shift yoke 60 3-speed / 4-speed shift Yoke 62 5th speed / reverse shift yoke 64 Lever housing 78 Shift and select shaft 80 Positioning mechanism 96 Shift arm 100 Shift claw 106 Shift guide groove 112 Shift guide member 116 Interlock plate 132 Position fixing mechanism 144 Reverse misshift prevention device 146 Plate Member 148 Cam member 150 Spring 158 Protrusion 1 60 Restricting surface 162 Slope 168 Fixed lever 186 Through hole 188 Rotation restricting portion 192 Rotating shaft 196 Fixed pin

Claims (3)

  A shift-and-select shaft supported by the lever housing and rotated about the axis by a select operation and slid in the axial direction by a shift operation, a shift arm attached to the shift-and-select shaft, and a shift arm A plurality of shift shafts that are engaged and moved in the shift direction, and one of the plurality of shift shafts is provided with a forward gear position on one side of the shift direction with the select position interposed therebetween. In addition, in a reverse miss shift prevention device for a manual transmission in which a reverse gear position is disposed on the other side in the shift direction, a plate member extending from the shift arm in a radial direction of the shift-and-select shaft, and the shift arm includes the shift arm A front position in the rotation direction of the plate member that rotates around the axis when moving to the forward position and the select position on the reverse position side. A cam member that contacts the plate member that is disposed and rotates and rotates about an axis that intersects the axis of the shift and select shaft, and biases the cam member to a neutral position in the rotational direction. The cam member is provided with a protrusion that abuts against the plate member, and the protrusion is provided when the shift arm moves from the forward gear position to the reverse gear position. A regulating surface that abuts on the plate member that moves in the axial direction and regulates movement to the reverse stage position; and the shift arm moves in the axial direction when the shift arm moves from the reverse stage position to the forward stage position. A reverse misshift prevention device for a manual transmission, comprising a slope allowing movement of a plate member.   The restriction surface includes a first restriction surface that abuts against a reverse surface side facing surface of the plate member that moves in an axial direction when the shift arm moves from the forward gear position to the reverse gear position; 2. The reverse misshift prevention device for a manual transmission according to claim 1, comprising: a second restriction surface that abuts on a select position side facing surface orthogonal to the position side facing surface.   A fixed lever which is formed in a substantially U shape surrounding the shift arm, and whose both ends are pivotally supported by the shift and select shaft and whose rotation is restricted by a rotation restricting member disposed in the lever housing. A rotating shaft having an axis in a direction intersecting with the axis of the shift and select shaft is provided on the fixed lever, the cam member is rotatably supported on the rotating shaft, and the urging force is applied to the rotating shaft. The reverse misshift prevention device for a manual transmission according to any one of claims 1 and 2, wherein the means is provided.

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