JP2009121503A - Speed change operating mechanism of manual transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain excellent shift feeling in a speed change operating mechanism having a shift rod with a shift fork being mounted thereon via an inversion mechanism. <P>SOLUTION: A speed change operating mechanism of a manual transmission comprises two shift rods 64, 66 for moving corresponding shift forks by the axial slide interlocking with the operation of a change lever in the shift direction, an inversion mechanism interposed between the shift rod 66 and its corresponding shift fork, and a turn regulating member 100 which is fixed to the shift rod 66, and holds the shift rod 64 slidably in the axial direction, and regulates the turn of the shift rod 66. The turn regulating member 100 comprises a body 104 fixed to the shift rod 66 and having two shaft parts 104a extending toward the shift rod 64 in the direction orthogonal to the axis thereof, and two cylindrical bodies 110 which are turnably supported by the two shaft parts 104a, and hold the shift rod 64 on its outer circumferential surface. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a shift operation mechanism of a manual transmission mounted on an automobile, and belongs to the technical field of an automobile transmission.

  In general, a manual transmission of an automobile is one of a plurality of gear trains having different gear ratios provided between an input shaft connected to an engine via a clutch and an output shaft connected to a drive wheel. The gear ratio between the two shafts is switched by selectively setting one of the gears in a power transmission state. In this case, the operation of setting one of the gear trains to the power transmission state is performed by the driver's change lever. This is done by sliding the sleeve of the synchronous meshing device adjacent to the gear train to the gear train side by the movement of the shift fork linked to the operation.

  Specifically, the shift fork is provided for each synchronous meshing device, and is connected to each of a plurality of shift rods arranged in parallel. The shift rod is selected through a gate mechanism by a change lever selection operation. , The shift fork attached to the shift rod slides the sleeve of the synchronous meshing device, and the gear train positioned in the slide direction is in a power transmission state. It is comprised so that.

  By the way, when the number of synchronous meshing devices increases with the increase in the number of shift stages, it becomes difficult to directly attach a shift fork that slides the sleeve of the synchronous meshing device to the shift rod because of its layout. As described in FIG. 1, a part of the shift fork may be separated from the shift rod, and the movement of the shift rod may be transmitted to the shift fork via a lever.

  In this case, since the shift rod is a cylindrical body and is slidably fitted in a bearing hole of the transmission case, the shift rod to which the shift fork is directly attached is in sync with the shift fork. Although the rotation is prevented by the engagement with the sleeve of the device, the shift rod for operating the shift fork via the reversing lever rotates about its axis. When the shift rod rotates and moves in the axial direction during the shift operation, the reversing lever cannot swing smoothly, which hinders the operation of the sleeve of the synchronous meshing device by the shift fork. .

  As a countermeasure, in the transmission described in Patent Document 1, a rotation restricting member for restricting the rotation of the shift rod is provided on the shift rod. That is, as shown in FIG. 7, the rotation restricting member 500 described in Patent Document 1 is fixed to the shift rod 504 whose one end is engaged with the reversing lever 502 and extends toward the adjacent shift rod 506. There are two claws 508, 508, and the shift rod 506 is slidably held in the axial direction (shift direction, vertical direction in the drawing) between the claws to rotate the shift rod 504. It is regulated.

  Thus, when the shift rod 504 moves in the axial direction, the reversing lever 502 can swing smoothly without difficulty, and the shift fork 510 engaged with the end of the reversing lever 502 on the side opposite to the shift rod. Move reliably.

JP-A 62-62042

  However, in the case of the configuration described in Patent Document 1, when any one of the shift rods is moved, the friction between the claws 508 and 508 of the rotation restricting member 500 and the rod 506 held between these claws. Due to the resistance, the shift operation becomes heavy (a large operating force is required during the shift operation).

  Further, as shown in FIG. 8B, the shift rod 504 (or 506) that moves in the axial direction by the shift operation may bend slightly due to the transmission of the operation force (FIG. The rod is also not bent.) As a result, the rotation restricting member 500 and the rod 506 gripped between the claws 508 and 508 are twisted, the frictional resistance therebetween increases further, and a larger operating force is required.

  As described above, the frictional resistance increases and a large operating force is required for the shift lever shift operation, so that the shift feeling is deteriorated.

Accordingly, the present invention provides a rotation restriction that is fixed to one of the two adjacent shift rods and regulates the rotation of the one shift rod by gripping the other shift rod so as to be slidable in the axial direction. In a transmission provided with a member, by suppressing the frictional resistance between the rotation restricting member and the other shift rod to be small, deterioration of shift feeling due to the necessity of a large operating force is suppressed. It is an object of the present invention to provide a shift operation mechanism of a manual transmission that can be used.

In order to solve the above-described problem, the invention described in claim 1 includes two shift rods that move the corresponding shift forks by sliding in the axial direction in conjunction with the operation in the shift direction of the change lever. A reversing mechanism interposed between one shift rod and the corresponding shift fork, and the one shift rod fixed to the one shift rod, and the other shift rod is slidably held in the axial direction to A shift operation mechanism of a manual transmission having a rotation restricting member that restricts the rotation of the shift rod,
The rotation restricting member is fixed to the one shift rod, and has a main body having two shaft portions extending in the direction perpendicular to the axis toward the other shift rod;
It has two cylindrical bodies that are rotatably supported by the two shaft portions of the main body and sandwich the other shift rod on the outer peripheral surface.

According to a second aspect of the present invention, in the shift operation mechanism of the manual transmission according to the first aspect,
The main body of the rotation restricting member has a base fixed to the one shift rod;
The base portion is composed of a gripping portion supported so as to be rotatable around a center line extending in the direction perpendicular to the axis at an intermediate position between the two shaft portions,
The two shaft portions are provided in the grip portion.

Furthermore, the invention according to claim 3 is the shift operation mechanism of the manual transmission according to claim 1 or 2,
A reversing mechanism interposed between the other shift rod and the shift fork corresponding thereto;
A rotation restricting member fixed to the other shift rod, holding the one shift rod so as to be slidable in the axial direction, and restricting the rotation of the other shift rod; and
The rotation restricting member is fixed to the other shift rod, and has a main body having two shaft portions extending in the direction perpendicular to the axis toward the one shift rod;
It has two cylindrical bodies that are rotatably supported by the two shaft portions of the main body and sandwich the one shift rod on the outer peripheral surface.

Furthermore, the invention according to claim 4 is characterized in that two shift rods each moving a corresponding shift fork by sliding in the axial direction in conjunction with an operation in the shift direction of the change lever, and one shift rod, A reversing mechanism interposed between the corresponding shift fork and the one shift rod is fixed to the one shift rod, and the other shift rod is slidable in the axial direction to rotate the one shift rod. A shift operation mechanism of a manual transmission having a rotation restricting member for restricting,
The rotation restricting member includes a base portion fixed to the one shift rod and a grip portion having two projecting portions that sandwich the other shift rod.
The grip portion is supported by the base portion so as to be rotatable around a center line extending in the direction perpendicular to the axis at an intermediate position between the two projecting portions.

  According to the first aspect of the present invention, when any one of the shift rods moves in the axial direction, the cylindrical body of the rotation restricting member rolls, so that the frictional resistance at the rod gripping portion of the rotation restricting member. Becomes smaller. Thereby, the shift operation of the change lever for moving either one of the shift rods in the axial direction can be executed with a small operation force, and the shift feeling becomes good.

  According to the invention described in claim 2, even if any one of the shift rods is bent, the gripping portion of the rotation restricting member swings, so that the rod gripping portion of the rotation restricting member and the shift rod In other words, the frictional resistance at the rod gripping portion of the rotation restricting member is reduced. Thereby, the shift operation of the change lever for moving either one of the shift rods in the axial direction can be executed with a small operation force, and the shift feeling becomes good.

  Further, according to the third aspect of the present invention, when the reversing mechanism is interposed between the other shift rod and the corresponding shift fork, the other shift rod is also the same as the one shift rod. The rotation restricting member is provided. As a result, regardless of which shift rod is moved, the operating force required for shifting the change lever for that purpose is almost the same small operating force. That is, the shift feeling is almost the same even if the shift rod to be moved is different.

  Furthermore, according to the invention described in claim 4, even if any one of the shift rods is bent, the gripping portion of the rotation restricting member swings, so that the rod gripping portion of the rotation restricting member and the shift rod In other words, the frictional resistance at the rod gripping portion of the rotation restricting member is reduced. Thereby, the shift operation of the change lever for moving either one of the shift rods in the axial direction can be executed with a small operation force, and the shift feeling becomes good.

  Hereinafter, the best mode for carrying out the present invention will be described.

  As shown in FIG. 1, a transmission 1 according to the best mode for carrying out the present invention includes an input shaft 4 to which a driving force is input from a driving shaft 2a of an engine 2 via a damper clutch 3, and the input The output shaft 5 is disposed on the same axis as the shaft 4, and the input shaft 4 and the counter shaft 6 are disposed in parallel to the output shaft 5. These shafts 4, 5, and 6 are rotatably supported by the transmission case via bearings and the like.

  Between these shafts, in order from the engine 2 side (the right side of the drawing), an input gear train GN, a sixth gear train G6, a second gear train G2, a first gear train G1, a third gear train G3, and a fourth gear train. G4, reverse gear train GR is provided. The input gear train GN includes a gear 10 fixed to the input shaft 4 and a gear 20 fixed to the counter shaft 6. The first speed gear train G <b> 1 includes a gear 11 that is loosely fitted to the output shaft 5 and a gear 21 that is fixed to the counter shaft 6. The second speed gear train G <b> 2 includes a gear 12 that is loosely fitted to the output shaft 5 and a gear 22 that is fixed to the counter shaft 6. The third speed gear train G3 includes a gear 13 fixed to the output shaft 5 and a gear 23 loosely fitted to the counter shaft 6 so as to be rotatable. The fourth speed gear train G4 includes a gear 14 fixed to the output shaft 5 and a gear 24 loosely fitted to the counter shaft 6 so as to be rotatable. The sixth-speed gear train G6 includes a gear 16 that is loosely fitted to the output shaft 5 and a gear 26 that is fixed to the counter shaft 6. The reverse gear train GR includes a gear 17 that is loosely fitted to the output shaft 5, a gear 27 that is fixed to the counter shaft 6, and a gear 37 that is provided between the gears 17 and 27. Has been. The transmission 1 according to the present embodiment is a 5-speed direct-coupled transmission and does not have a 5-speed gear train.

  Further, between the first speed gear train G1 and the second speed gear train G2 on the output shaft 5, between the third speed gear train G3 and the fourth speed gear train G4 on the counter shaft 6, and the input gear train on the output shaft 5. Between the GN and the sixth speed gear train G6 and on the opposite engine side (left side of the drawing) of the reverse gear train GR on the output shaft 5, the gear train of the gear stage selected by the driver's gear stage selection operation is displayed. First, second, third, and fourth synchronous meshing devices 41, 42, 43, and 44 are provided to selectively transmit power.

  In the first synchronous meshing device 41, the sleeve 41a moves to the first speed gear G1 side to connect the gear 11 and the output shaft 5, or the sleeve 41a moves to the second speed gear G2 side to move the gear 12 and the output shaft. 5 are connected to each other. As a result, the rotation of the input shaft 4 is transmitted to the output shaft 5 via the counter shaft 6, the sleeve 41 a, and either the gear 11 or the gear 12.

  In the second synchromesh device 42, the sleeve 42a moves to the 3rd speed gear train G3 side to connect the gear 23 and the counter shaft 6, or the sleeve 42a moves to the 4th speed gear G4 side to move the gear 24 and the counter. It is comprised so that the axis | shaft 6 may be connected. As a result, the rotation of the input shaft 4 is transmitted to the output shaft 5 via the counter shaft 6, the sleeve 42 a, and either the gear 23 or the gear 24.

  In the third synchromesh device 43, the sleeve 43a moves to the input gear train GN side to connect the input shaft 4 and the output shaft 5 via the gear 10, or the sleeve 43a moves to the 6th speed gear train G6 side. Thus, the gear 16 and the output shaft 5 are connected. Thereby, the rotation of the input shaft 4 is directly transmitted to the visual output shaft 4 via the sleeve 43a and the gear 10, or is transmitted to the output shaft 4 via the counter shaft 6, the gear 16, and the sleeve 43a. .

  The fourth synchronization meshing device 44 is configured such that the sleeve 44a moves to the reverse gear train GR side to connect the gear 17 and the output shaft 5. As a result, the rotation of the input shaft 4 is transmitted to the output shaft 5 via the counter shaft 6 and the gear 17.

  From here, the speed change operation mechanism which selectively moves the sleeves 41a, 42a, 43a, 44a of the first to fourth synchronous meshing matching devices 41 to 44 will be described.

  As shown in FIG. 2 which is a partial cross-sectional view and FIG. 3 which is a partial perspective view, the speed change operation mechanism 50 is moved in the axial direction by a holder 56 fixed to the lower surface of the upper surface cover 54 of the transmission case 52. The four shift rods 60, 62, 64, 66 that are supported in the axial direction are selected by a select operation and a shift operation of a change lever 68 disposed on the rear side (left side in FIG. 1) of the transmission 1. It is configured to selectively slide. In that case, the shift rods 60, 62, 64, 66 are parallel to the axial direction of the transmission 1 and from the near side in FIG. The shift rod 62, the shift rod 64 for 3-4 speed, and the shift rod 66 for 5-6 speed are arranged in this order.

  As shown in FIG. 3, the shift rod 60 is attached with a shift fork 70 that engages with the sleeve 44 a of the fourth synchromesh device 44. As the shift rod 60 moves in the axial direction, the sleeve 44 a of the fourth synchromesh device 44 is moved in the same direction as the shift rod 60 via the shift fork 70.

  A shift fork 72 that engages with the sleeve 41 a of the first synchronous meshing device 41 is attached to the shift rod 62. As the shift rod 62 moves in the axial direction, the sleeve 41 a of the first synchromesh device 41 is moved in the same direction as the shift rod 60 via the shift fork 72.

  A shift fork 74 that engages with the sleeve 42 a of the second synchronization engagement device 42 is attached to the shift rod 64 via a reversing mechanism 76. As the shift rod 62 moves in the axial direction, the sleeve 42 a of the second synchromesh device 42 is moved in the direction opposite to the movement direction of the shift rod 64 via the reversing mechanism 76 and the shift fork 74.

  A shift fork 76 that engages with the sleeve 43 a of the third synchromesh device 43 is attached to the shift rod 66 via a reversing mechanism 80. When the shift rod 66 moves in the axial direction, the sleeve 43a of the third synchromesh device 43 is moved in the direction opposite to the moving direction of the shift rod 66 via the reversing mechanism 80 and the shift fork 78.

  As shown in FIG. 2, the four shift rods 60 to 66 and the change lever 68 are connected to the lower end portion of the change lever 68 via an engagement mechanism 82, and the shaft of the transmission 1. A control rod 84 provided along the direction and supported by the transmission case 52 so as to be movable in the axial direction, a front end portion (right end portion in FIG. 2) of the control rod 84, and four shift rods A gate mechanism 86 that is provided between each of the rear side ridges 60 to 66 and selectively engages one of the shift rods 60 to 66 with the control rod 84 is provided.

  The change lever 68 is rotatably supported by a control case 88 having an intermediate spherical bearing 68 a disposed above the transmission case 52. When the change lever 68 is tilted in the vertical direction (front and back direction) in FIG. 2 with the spherical bearing portion 68a as a fulcrum (when the selection operation of the change lever 68 is executed), the control rod 84 rotates via the engagement mechanism 82. Moved.

  When the change lever 68 tilts in the left and right directions A and B in FIG. 2 with the spherical bearing portion 68a as a fulcrum (when the shift lever 68 is shifted), the control rod 84 is moved back and forth via the engaging portion 82. Moved (moves in the horizontal direction A ′, B ′ in the figure).

  As shown in FIGS. 2 and 3, the gate mechanism 86 includes engaging members 86a, 86b, 86c, 86d provided at the rear ends of the four shift rods 60 to 66, and these engaging members. A selective member 86e provided at the front end of the control rod 84 is selectively engaged.

  The select member 86e includes a select arm 86e1 extending in a direction orthogonal to the axial direction. In order to engage with the select arm 86e1, the select member 86a has a select gate 86a1 and the engagement member 86b has a select gate 86b1. A select gate 86c1 is formed on the engaging member 86c, and a select gate 86d1 is formed on the engaging member 86d. The four select gates 86 a 1, 86 b 1, 86 c 1, 86 d 1 are formed on the respective engaging members so as to be positioned on the track of the select arm 86 e 1 that moves as the control rod 84 rotates. In FIG. 3, the select arm 86e1 is engaged with the select gate 86b1. In FIG. 4 showing a cross section viewed from the X direction shown in FIGS. 2 and 3, the select arm 86e1 is engaged with the select gate 86c1.

  According to such a configuration, the control rod 84 is rotated by the selection operation of the change lever 68. By the rotation of the control rod 84, the select arm 86e1 of the select member 86e is selectively engaged with any one of the select gates 86a1, 86b1, 86c1, 86d1 of the engaging members 86a, 86b, 86c, 86d.

  When a shift operation of the change lever 68 is executed in a state where the select arm 86e1 is engaged with the select gate of any of the engaging members, a shift in which an engaging member with which the select arm 86e1 is engaged is provided. The rod is moved in the axial direction. In the state of FIG. 3 in which the select arm 86e1 is engaged with the select gate 86b1, the shift rod 62 is moved in the axial direction, whereby the shift fork 72 is moved in the axial direction. As a result, the first synchromesh device 41 The sleeve 41a is moved in the axial direction.

  From here, the characteristic part of this invention is demonstrated.

  As shown in FIG. 3, among the four shift rods 60 to 66, the shift rod 64 that moves the shift fork 74 via the reverse mechanism 76, and the shift rod 66 that moves the shift fork 78 via the reverse mechanism 80 Are attached with rotation restricting members 100 and 100 for restricting the rotation.

  Like the shift rods 60 and 62, the shift rod in which the shift fork that engages with the sleeve of the synchronous meshing device is provided directly without the reversing mechanism does not rotate because the rotation of the sleeve is restricted. . On the other hand, unlike the shift rods 64 and 66, the shift rod to which the shift fork is attached via the reversing mechanism rotates.

  To explain the reason, as shown in FIG. 3, for example, the reversing mechanism 76 has a reversing lever 76a that swings about a rotation center line 76c extending in a direction orthogonal to the axial direction, and one end of the reversing lever 76a is shifted. By being pushed or pulled by the rod 64, the other end of the reversing lever 76a opposed across the rotation center line 76c is configured to pull or push the shift fork 74. That is, the reversing mechanism 76 converts the linear motion of the shift rod 64 into the swaying motion of the reversing lever 76 a, and further converts the swaying motion into the linear motion of the shift fork 74.

  Therefore, in order to smoothly perform the conversion of the movement, the shift rod 64 is not completely fixed to the reversing lever 76a of the reversing mechanism 76, but is engaged with the reversing lever 76a with play. ing. Therefore, the shift rod 64 rotates.

  When the shift rod 64 rotates in this way, the reversing lever 76a of the reversing mechanism 76 cannot be swung about the rotation center line 76c smoothly and smoothly. As a countermeasure, the rotation restricting members 100 and 100 are attached to shift rods 64 and 66 provided with shift forks 74 and 78 via reversing mechanisms 76 and 80, respectively.

  The rotation restricting member 100 will be specifically described.

  FIG. 5 is a perspective view of the rotation restricting member 100, and FIG. 6 is a cross-sectional view of the rotation restricting member 100 orthogonal to the axial direction of the shift rods 64 and 66. The rotation restricting member 100 shown in FIGS. 5 and 6 is for restricting the rotation of the shift rod 66.

  As shown in FIGS. 5 and 6, the rotation restricting member 100 includes a base 102 fixed to a shift rod 66 that restricts rotation, and a parallel direction (axial direction) of two shift rods 64 and 66 on the base 102. And a grip portion 104 that is supported so as to be rotatable about a rotation center line c extending in a direction orthogonal to the shift rod 66 toward the shift rod 64 and slidably grips the shift rod 64 in the axial direction. Have.

  A shaft portion 102a formed in the base portion 102 and extending in the direction of the center line c is rotatably inserted into the through hole formed so as to extend in the direction of the rotation center line c of the grip portion 104. Further, a retaining ring 106 for retaining the grip 104 is attached to the tip of the shaft portion 102a. Further, the base 102 has a hole into which the shift rod 66 is inserted, and is fixed to the shift rod 66 by a fixing pin 108 that passes through the base 102 and the shift rod 66.

  The grip portion 104 is formed with two shaft portions 104a and 104a extending in the direction of the rotation center line c. The shaft portions 104a and 104a support the cylindrical bodies 110 and 110, respectively, so that the cylindrical bodies 110 and 110 can be rotated. Further, the shaft portions 104a and 104a are arranged so that the rotation center lines c1 and c1 of the cylindrical bodies 110 and 110 are parallel to the rotation center line c of the grip portion 104 and are equidistant from the center line c. In addition, the cylindrical bodies 110 and 110 sandwich the shift rod 64 on the outer peripheral surface so that the three rotation center lines c, c1 and c1 are arranged on a plane orthogonal to the axial direction of the shift rod 64. It is configured.

  According to such a rotation restricting member 100, when the shift rod 64 moves in the axial direction or when the turn restricting member 100 moves in the axial direction together with the shift rod 66, the cylindrical bodies 110 and 110 roll. As a result, the frictional resistance between the cylindrical bodies 110, 110 and the shift rod 66 is reduced. As a result, the shift operation of the change lever 68 for moving either of the shift rods 64 and 66 in the axial direction can be executed with a small operating force, and the shift feeling becomes good.

  Further, even if either one of the shift rods 64 and 66 is bent, the gripping portion 104 of the rotation restricting member 100 is swung so that the twisting between the two cylindrical bodies 110 and 110 and the shift rod 64 is eliminated. In other words, during the movement of one of the shift 64 and the shift 66 in the axial direction, the grip portion 104 swings so as to eliminate the twist. As a result, the shift operation of the change lever 68 for moving either one of the shift rods 64 and 66 in the axial direction can be executed with a small operating force, and the shift feeling becomes good.

  Furthermore, since the rotation member 100 is provided on each of the two shift rods 64 and 66, the operation force required for the shift operation of the change lever 68 for moving either shift rod is approximately the same. Small operating force. That is, the shift feeling is almost the same even if the shift rods 64 and 66 to be moved are different.

  While the present invention has been described with reference to the above-described embodiment, the present invention is not limited to this.

  For example, in the case of the above-described embodiment, considering that the shift rod bends, the main body of the rotation restricting member is supported by the base that is fixed to the shift rod that restricts the rotation, and is swingably supported by the base. It consists of two separate members that grip the adjacent shift rods so that they can slide. However, if the shift rod has a very small amount of deflection (such as when the shift rod is highly rigid), the base and grip The part may be formed of an integral member. That is, it may be a rotation restricting member having a main body in which the gripping portion does not swing. That is, the rotation restricting member is attached to a shift rod that restricts the rotation, and has a main body having two shaft portions extending in the direction perpendicular to the axis toward the other shift rod, and is rotatable on each of the two shaft portions. The cylindrical body is supported and sandwiches the other shift rod on the outer peripheral surface. In this case, the structure of the rotation restricting member is simpler than that of the above-described embodiment.

  In the case of the above-described embodiment, the rod gripping portion can roll to reduce the frictional resistance between the rod gripping portion (cylindrical body in the above) of the rotation restricting member and the shift rod gripped by the rod gripping portion. It is composed of a cylindrical body. On the other hand, the frictional resistance when one of the rod gripping portion of the rotation restricting member and the shift rod gripped by this slides relative to the other is so small that it does not adversely affect the shift feeling. In this case, it is not necessary to configure the rod gripping portion with a rollable cylindrical body. That is, the rotation restricting member includes a base portion fixed to one shift rod and a grip portion having two projecting portions that slidably hold the other shift rod in the axial direction. The base is supported so as to be rotatable around a center line extending in the direction perpendicular to the axis at an intermediate position between the two protrusions. In this case, the structure of the rotation restricting member is simpler than that of the above-described embodiment.

  As described above, the shift operation mechanism of the manual transmission according to the present invention can execute the shift lever shift operation related to the axial movement of the shift rod that moves the shift fork through the reversing mechanism with a small operating force. It becomes possible and a good shift feeling is obtained. Therefore, it may be suitably used in the field of automobile industry or automobile transmission manufacturing industry.

1 is a skeleton diagram of a manual transmission according to an embodiment of the present invention. It is sectional drawing of a part of manual transmission mechanism of the manual transmission which concerns on embodiment of this invention. It is the perspective view which abbreviate | omitted partially the manual transmission mechanism of the manual transmission which concerns on embodiment of this invention. It is sectional drawing of the X direction shown to FIG. 2 and FIG. It is a perspective view of a rotation control member. It is sectional drawing of a rotation control member. It is a figure which shows the conventional rotation control member. It is a figure for demonstrating one of the problems of the conventional rotation control member.

Explanation of symbols

64 Shift rod 66 Shift rod 100 Rotation restricting member 104 Main body (gripping part)
104a Shaft 110 Cylindrical body

Claims (4)

It is interposed between two shift rods that move the corresponding shift forks by sliding in the axial direction in conjunction with the operation of the shift lever in the shift direction, and one shift rod and the corresponding shift fork. Manual transmission having a reversing mechanism and a rotation restricting member fixed to the one shift rod and slidably gripping the other shift rod in the axial direction to restrict the rotation of the one shift rod. A speed change operation mechanism,
The rotation restricting member is fixed to the one shift rod, and has a main body having two shaft portions extending in the direction perpendicular to the axis toward the other shift rod;
A shift operation mechanism for a manual transmission, characterized in that it has two cylindrical bodies that are rotatably supported by two shaft portions of the main body and sandwich the other shift rod on the outer peripheral surface. The shift operation mechanism of the manual transmission according to claim 1,
The main body of the rotation restricting member has a base fixed to the one shift rod;
The base portion is composed of a gripping portion supported so as to be rotatable around a center line extending in the direction perpendicular to the axis at an intermediate position between the two shaft portions,
The shift operation mechanism for a manual transmission, wherein the two shaft portions are provided in the grip portion. The shift operation mechanism of the manual transmission according to claim 1 or 2,
A reversing mechanism interposed between the other shift rod and the shift fork corresponding thereto;
A rotation restricting member fixed to the other shift rod, gripping the one shift rod so as to be slidable in the axial direction, and restricting the rotation of the other shift rod; and
The rotation restricting member is fixed to the other shift rod, and has a main body having two shaft portions extending in the direction perpendicular to the axis toward the one shift rod;
A shift operation mechanism for a manual transmission, comprising two cylindrical bodies that are rotatably supported by two shaft portions of the main body and sandwich the one shift rod on an outer peripheral surface thereof. It is interposed between two shift rods that move the corresponding shift forks by sliding in the axial direction in conjunction with the operation of the shift lever in the shift direction, and one shift rod and the corresponding shift fork. Manual transmission having a reversing mechanism and a rotation restricting member fixed to the one shift rod and slidably gripping the other shift rod in the axial direction to restrict the rotation of the one shift rod. A speed change operation mechanism,
The rotation restricting member includes a base portion fixed to the one shift rod and a grip portion having two projecting portions that sandwich the other shift rod.
The shift operation mechanism for a manual transmission, wherein the grip portion is supported by the base portion so as to be rotatable around a center line extending in the direction perpendicular to the axis at an intermediate position between the two protrusions.

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