JP6112831B2 - Manual transmission operating mechanism - Google Patents

Description

  The present invention relates to an operation mechanism for a manual transmission, and more particularly to an operation mechanism for a manual transmission that can accurately prevent shift stacking during a shift operation.

The operation mechanism of the manual transmission is described in, for example, Patent Document 1 below,
It is supported so as to be movable in the axial direction and rotatable around the axis, and is moved in the axial direction by a shift operation force to be moved to a position corresponding to either the neutral position or two shift positions sandwiching it. A shift select shaft that is rotated by a select operation force and moved to at least two select positions;
A shift fork for selectively establishing each shift stage and a shift head for selectively receiving a shift operating force from the shift select shaft are integrally provided, and the shift head is provided on the shaft of the shift select shaft. A plurality of shift fork shafts arranged so as to be movable in the axial direction in parallel with the shift select shaft in a state of being linked in a circumferential direction around the circumference;
An inner lever fixed to the shift select shaft, having an arm portion projecting radially from the shift select shaft, and moving integrally with the shift select shaft;
The inner lever is provided with a pair of guide surfaces that are in slidable contact with each other on both sides in the circumferential direction of the base of the arm portion, and is assembled to be rotatable relative to the inner lever in an axial direction and integrally rotatable. The inner lever is selectively positioned at a rotation position that engages with one of the shift heads provided on each of the plurality of shift fork shafts by being rotated in conjunction with the operation to each select position. And an interlock member that allows the inner lever to move in the axial direction and restrains the shift head not engaged with the inner lever at the neutral position.
The shift head is formed with an engaging groove for receiving the tip of the arm so as to engage with both axial ends of the tip of the arm of the inner lever.
The interlock member sandwiches the engaged shift head, and is fitted in an engagement groove of the non-engaged shift head to constrain the non-engaged shift head to a neutral position. The guide part is provided,
In a shift stage that involves a shift operation and a select operation at the same time, the shift head and the guide portion of the interlock member are each provided with chamfers for allowing an oblique operation during a shift.

Japanese Patent No. 4826219

  Incidentally, in the operation mechanism of the manual transmission described in Patent Document 1, the operation amount of the select operation is set to a set value (a specified value required for changing the select position), as schematically shown in FIG. (The value less than 2)), the guide member 1a of the interlock member 1 and the shift head 3 are positioned in the axially opposite portion where the guide portion 1a and the shift head 3 face each other in the axial direction (direction perpendicular to the paper surface of FIG. 6). The chamfer S1 provided on the guide portion 1a is parallel to the protruding radial line La of the arm portion 2 of the inner lever (the radial line from which the arm portion 2 of the inner lever protrudes from the shift select shaft). The radial contour line Lo formed on the axial end surface of the guide portion 1a (a plane perpendicular to the axis of the shift select shaft) by the chamfering S1 is provided. It is parallel to the projecting radial line La of the arm portion 2.

  Further, the chamfer S2 provided in the shift head 3 is provided so as to be parallel to the radiation Lb (corresponding to the select position) passing through the axis (rotation center) of the shift select shaft, A radial contour L2 formed on the axial end surface of the shift head 3 (a plane perpendicular to the axis of the shift select shaft) by the chamfering S2 is parallel to the radiation Lb.

  For this reason, when the operation amount of the select operation reaches the set value (when the positional relationship between the arm portion 2 of the inner lever and the shift head 3 is as shown in FIG. 6), the guide portion of the interlock member 1 The radial contour Lo formed on the axial end surface on the guide portion side by the chamfering S1 on the guide portion side at the axially facing portion where 1a and the shift head 3 face each other in the axial direction is It arrange | positions so that the radial outline L2 formed in the axial direction end surface at the side of a shift head by chamfering S2 may cross | intersect by an axial view.

  Accordingly, when the shift operation is performed to move the shift head 3 in the upward direction on the paper surface of FIG. 6 in a state where the operation amount of the select operation is the set value (state of FIG. 6), the axial end surface of the shift head 3 As a result, the axial end face of the guide portion 1a comes into contact with each other at the hatched portion in FIG.

In order to solve the above-described problems, in the above-described manual transmission operating mechanism,
When the operation amount of the selection operation reaches a set value, the chamfering on the guide portion side at the axially opposed portion where the guide portion of the shift head and the interlock member are opposed to each other in the axial direction. A radial outline formed on the axial end surface on the guide portion side is formed on the axial end surface on the shift head side by the chamfering on the shift head side with respect to the projecting radial direction line of the arm portion. It is also possible to apply an inclination (taper) to at least one of the double-sided chamfers so as to be arranged on the outer side in the circumferential direction as viewed in the axial direction as compared to the radial outline.

In such an operation mechanism of the manual transmission, when the operation amount of the select operation is smaller than the set value by a predetermined amount, the radial contour formed on the axial end surface on the guide portion side is the protruding radial direction of the arm portion. Compared to the radial contour line formed on the axial end surface on the shift head side, the wire is arranged on the inner side in the circumferential direction as viewed in the axial direction. For this reason, when the operation amount of the select operation is smaller than the set value by a predetermined amount, when the shift operation is performed, the guide portions of the shift head and the interlock member are moved to the axial end surface (with respect to the axial direction) where the chamfer is not provided. The planes orthogonal to each other are necessary and sufficient to obtain the same interlock function as before. For this reason, the interlock function by an interlock member is not inhibited.

Further, when the operation amount of cell recto operation is equal to or more than a set value, when the shift operation is performed, the guide portion of the shift head and interlock member, inclined with respect to the slope (axial direction provided with chamfered The shift head and the interlock member are not caught by contacting with each other. For this reason, it is possible to accurately prevent the shift stack resulting from the catch of the shift head and the guide portion of the interlock member.

Therefore, when the operation amount of the cell recto operation and maintenance of the interlock function by interlocking member in a predetermined amount smaller than that set value, the diagonal operation during transmission in the same time involving shift stage shift operation and a select operation is performed It is possible to achieve both prevention of shift stack in a state where the operation amount of the selection operation is equal to or greater than the set value.

In the above-described manual transmission operating mechanism , the shift head and the guide portion of the interlock member are chamfered to allow an oblique operation at the time of a shift at a shift stage that simultaneously involves a shift operation and a select operation. In the present invention , a chamfer for allowing an oblique operation at the time of shifting is provided only in the guide portion of the interlock member in a shift stage that simultaneously involves a shift operation and a select operation. is not that.

In this case, when the operation amount of the selection operation reaches a set value, the chamfering causes the shift head and the guide portion of the interlock member to face each other in the axially opposed portion where the guide portion faces the axial direction. The radial contour formed on the axial end surface of the guide portion is compared to the radial contour formed on the axial end surface on the shift head side with respect to the projecting radial direction line of the arm portion. The chamfer is inclined (tapered) so as to be arranged on the outer side in the circumferential direction when viewed in the axial direction. Also in this case, the same effect as that of the above-described manual transmission operating mechanism can be obtained.

One embodiment of the operation mechanism of a manual transmission (inclined chamfer provided on the guide portion (the embodiment tapered) is applied) is a perspective view of a schematically indicated overall structure. FIG. 2 is an enlarged front view of the vicinity of a select operation unit of the embodiment illustrated in FIG. 1. The relationship between the inner lever, the interlock member, each shift head, etc. shown in FIG. 2 (the relationship when the operation amount of the select operation becomes a set value during the shift operation from the fifth shift stage to the fourth shift stage). FIG. 3 is a developed view in the circumferential direction (a developed view of a circumferential section taken along line 3-3 in FIG. 2). FIG. 4 is an enlarged view of the inner lever and the interlock member shown in FIG. 3 and the relationship between the two shift heads engaged with the inner lever and the like as viewed in the axial direction (cross section taken along line 4-4 in FIG. 3). Hand is a 4 enlarged view of a substantial another embodiment of the dynamic transmission operation mechanism (inclined chamfer provided on the shift head (embodiment tapered) is applied). FIG. 6 is an enlarged view of a main part corresponding to FIG. 4 of an embodiment (an embodiment in which the chamfer provided in the guide portion and the chamfer provided in the shift head are not inclined (tapered)) for explaining the problem of the present invention. is there.

Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is an embodiment of the operating mechanism of the manual transmission is intended to schematically show, in the manual transmission 100 in this embodiment, in a transmission case (not shown), the shift select shaft 12 and the first shift Three shift fork shafts of the fork shaft 14, the second shift fork shaft 16, and the third shift fork shaft 18 are assembled, and a shift lever 20 and a select lever 22 are assembled. In the manual transmission 100 shown in FIG. 1, the reverse speed transmission mechanism is not shown.

  As shown in FIGS. 1 and 2, the shift select shaft 12 is supported by a bearing (not shown) so as to be movable in the axial direction and rotatable about the axis O1. Further, the shift select shaft 12 is moved in the axial direction by the shift operation force F1 (see FIG. 3) transmitted in association with the operation of the shift operation lever 24 in the shift direction (X direction), so that the neutral position and The selection operation force F2 (see FIG. 3) is configured to be moved to a position corresponding to one of the two shift positions sandwiching the, and transmitted in connection with the operation of the shift operation lever 24 in the selection direction (Y direction). ) To be moved to any one of the select positions (one of a plurality of select positions).

  The shift operation force F1 transmitted to the shift select shaft 12 in association with the operation of the shift operation lever 24 in the shift direction (X direction) is transmitted from the shift operation lever 24 to the input portion 20a of the shift lever 20. The shift lever 20 is configured to be transmitted to the shift select shaft 12 via the shaft portion 20b and the output portion 20c. The select operation force F2 transmitted to the shift select shaft 12 in association with the operation of the shift operation lever 24 in the select direction (Y direction) is transmitted from the shift operation lever 24 to the input portion 22a of the select lever 22. The shift select shaft 12 is configured to be transmitted to the input portion 51 of the interlock member 50 via the shaft portion 22b and the output portion 22c of the select lever 22, and from the interlock member 50 via the inner lever 40. It is comprised so that it may be transmitted.

  The first shift fork shaft 14 is supported parallel to the shift select shaft 12 and movably in the axial direction. Further, the first shift fork shaft 14 selectively receives the shift operation force F1 from the first shift fork 26 and the shift select shaft 12 for selectively establishing the first shift stage or the second shift stage. A shift head 28 is integrally provided.

  The second shift fork shaft 16 is supported parallel to the shift select shaft 12 and movably in the axial direction. Further, the second shift fork shaft 16 selectively receives the shift operation force F1 from the second shift fork 32 and the shift select shaft 12 for selectively establishing the third shift speed or the fourth shift speed. A shift head 34 is integrally provided.

  The third shift fork shaft 18 is supported parallel to the shift select shaft 12 and movably in the axial direction. Further, the third shift fork shaft 18 selectively receives the third shift fork 36 for selectively establishing the fifth shift stage or the sixth shift stage and the shift operation force F1 from the shift select shaft 12. A shift head 38 is integrally provided.

  As shown in FIG. 2, each shift fork shaft 14, 16, 18 is connected to the shift select shaft 12 with the shift heads 28, 34, 38 being connected in the circumferential direction around the axis of the shift select shaft 12. They are arranged in parallel and movable in the axial direction.

  The shift select shaft 12 is provided with an inner lever 40 for selectively moving any one of the first shift fork shaft 14 to the third shift fork shaft 18 in the axial direction, and cooperates with the inner lever 40. Thus, an interlock member 50 for defining the movement of each shift head 28, 34, 38 is provided.

  As shown in FIG. 2, the inner lever 40 is fitted to the shift select shaft 12 and fixed integrally therewith, and the outer periphery of the cylindrical portion 41 protrudes outward in the radial direction of the shift select shaft 12. The arm portion 42 is provided and is configured to move integrally with the shift select shaft 12.

  As shown in FIG. 2, the interlock member 50 includes a pair of guide surfaces 52 that are in sliding contact with both sides in the circumferential direction of the base portion of the arm portion 42 of the inner lever 40, and are opposed to the inner lever 40. It is assembled such that it can move relative to the direction and can rotate integrally. Further, the interlock member 50 is rotated by the select lever 22 in conjunction with the operation to each select position, so that the shift heads 28, 34 provided on the plurality of shift fork shafts 14, 16, 18 respectively. , 38 (for example, the shift head 34 in FIG. 2), the inner lever 40 is selectively positioned at a rotating position, the inner lever 40 is allowed to move in the axial direction, and the inner lever 40 is not The engaging shift head (eg, shift heads 28, 38 of FIG. 2) is configured to be constrained to the neutral position.

  Further, in this embodiment, each of the shift heads 28, 34, 38 has an engaging groove 28 a that receives the distal end portion of the arm portion 42 so as to engage with both axial ends of the distal end portion of the arm portion 42 of the inner lever 40. 34a and 38a are formed. Further, the interlock member 50 sandwiches the shift head to be engaged (for example, the shift head 34 in FIG. 2) and engages the non-engaged shift head (for example, the shift heads 28 and 38 in FIG. 2). Arc-shaped guide portions 53 and 54 that are fitted into the concave grooves (28a and 38a) and restrain the non-engaged shift head at the neutral position are provided.

  In this embodiment, the shift heads 28, 34, 38, the arm portion 42 of the inner lever 40, and the guide portions 53, 54 of the interlock member 50 are shifted at a gear stage that simultaneously involves a shift operation and a select operation. A chamfer is provided to allow an oblique operation during the above. In this embodiment, the chamfer (the chamfer 38s1 provided on the shift head 38, the arm portion 42) that functions during the speed change operation (at the time of the speed change operation from the fifth speed to the fourth speed) shown in FIG. Chamfers 42 s 1 and 42 s 2 provided on the head, chamfers 34 s 1 and 34 s 2 provided on the shift head 34, chamfers 53 s 1 provided on the guide portion 53, and chamfer provided on the shift head 34). Description of is omitted.

  The chamfer 42s1 provided in the arm portion 42 can be engaged with the chamfer 38s1 provided in the shift head 38 during the shift operation shown in FIG. 3 (during the shift operation from the fifth shift stage to the fourth shift stage). It is. Further, the chamfer 42s2 provided on the arm portion 42 can be engaged with the chamfer 34s1 provided on the shift head 34 during the speed change operation shown in FIG. Further, the chamfer 34s2 provided on the shift head 34 can be engaged with the chamfer 53s1 provided on the guide portion 53 during the speed change operation shown in FIG. It is also possible to eliminate the chamfers 42 s 1 and 42 s 2 provided on the arm portion 42 by appropriately setting the shapes of the chamfer 38 s 1 provided on the shift head 38 and the chamfer 34 s 1 provided on the shift head 34. It is.

  By the way, in this embodiment, as shown in FIG. 4, the chamfer 34s2 provided in the shift head 34 corresponds to the radiation Lb (corresponding to the select position) passing through the axis O1 of the shift select shaft 12 as in the prior art. ) In the radial direction formed on the axial end surface 34s of the shift head 34 (a plane orthogonal to the axis O1 of the shift select shaft 12) by the same chamfer 34s2. The contour line L2 is parallel to the radiation Lb. On the other hand, the chamfer 53s1 provided in the guide portion 53 of the interlock member 50 is inclined (tapered) as will be described in detail below, unlike the conventional one.

  That is, in this embodiment, as shown in FIGS. 3 and 4, the operation amount θ of the select operation (the amount of rotation of the shift select shaft 12, the inner lever 40, the interlock member 50, etc.) is the set value θ1 (select position). When the shift head 34 and the guide member 53 of the interlock member 50 face each other in the axial direction (the axes of the chamfer 34s2 and the chamfer 53s1). The radial contour line L1 formed on the axial end surface 53s on the guide portion 53 side by the chamfer 53s1 on the guide portion 53 side is the projecting radial direction line La (shift select) of the arm portion 42 at the direction facing portion). The radial contour line formed on the axial end surface 34s on the shift head 34 side by the chamfer 34s2 on the shift head 34 side with respect to the radial line of the shaft 12) 4 in the axial view shown in FIG. 4 so that the surface is arranged on the outer side in the circumferential direction (a position away from the projecting radial line La in the circumferential direction as compared with the contour line L2). The handle 53s1 is inclined (tapered).

  In the present embodiment, the inclination (taper) to the chamfer 53s1 is formed by making the chamfering amount of the outer peripheral side portion of the chamfer 53s1 larger than the chamfering amount of the inner peripheral portion of the chamfer 53s1. Yes. The contour line Lo indicated by the two-dot chain line in FIG. 4 is a guide when the chamfering amount of the outer peripheral portion in the chamfer (53s1) is the same as the chamfering amount of the inner peripheral portion in the chamfer (53s1). This is a radial contour formed on the axial end surface 53s on the guide part 53 side by the chamfering (53s1) on the side 53, and when the chamfering (53s1) is not inclined (tapered). is there.

  Further, in this embodiment, the set value θ1 described above is the select operation between the select positions (for example, the forward 5/6 speed select position and the forward 3/4 speed select position), as is apparent from FIG. The set value (θ1) is smaller than the select operation amount (θo) between the select positions, although it is about 1/3 smaller than the amount (specified value θo required for changing the select position). Any small value can be used, and it can be set as appropriate (for example, set to about 1/2 or about 2/3).

  In this embodiment configured as described above, when the operation amount θ of the select operation is smaller than the set value θ1, the radial contour line L1 formed on the axial end surface 53s on the guide portion 53 side is the arm portion. Compared to the radial contour line L2 formed on the axial end surface 34s on the shift head 34 side, the projected radial line La of 42 is arranged on the inner side in the circumferential direction as viewed in the axial direction. . For this reason, when the operation amount θ of the select operation is smaller than the set value θ1 by a predetermined amount, when the shift operation is performed on the fourth forward speed side, the shift head 34 and the guide portion 53 of the interlock member 50 are chamfered. The non-axial end faces 34s and 53s (refer to the plane orthogonal to the axial direction shown in FIG. 3) are in contact with each other as necessary, and the interlock function (two shift heads 34 and 38) equivalent to the conventional one is provided. At the same time, a function of preventing double meshing by preventing shifting is obtained. For this reason, the interlock function by the interlock member 50 is not inhibited.

  In this embodiment, when the operation amount θ of the select operation is equal to or larger than the set value θ1 (less than θo), when the shift operation is performed on the fourth forward speed side, the shift head 34 and the guide portion 53 of the interlock member 50 are used. However, the slopes (slopes inclined with respect to the axial direction) where the chamfers 34s1 and 53s1 are provided do not come into contact with each other, and the shift head 34 and the interlock member 50 are not caught. For this reason, it is possible to accurately prevent the shift stack caused by the catch of the shift head 34 and the guide portion 53 of the interlock member 50. In this case, during the shift operation, the select operation force F2 as shown in FIG. 3 is obtained, and the select operation is performed simultaneously.

  Therefore, in this embodiment, the interlock function is maintained by the interlock member 50 in a state where the operation amount θ of the select operation is smaller than the set value θ1, and at the time of shifting at the gear stage that involves the shift operation and the select operation at the same time. It is possible to achieve both prevention of shift stack in the state where the operation amount θ of the select operation when the oblique operation is performed is equal to or larger than the set value θ1.

  Note that the chamfering (53a1) provided on the guide portion 53 of the interlock member 50 is not inclined (tapered), and the entire chamfering (53a1) is enlarged, and the state shown in FIG. In the state where the amount θ is the set value θ1, the shift head 34 and the guide portion 53 of the interlock member 50 abut each other on the inclined surfaces (inclined with respect to the axial direction) where the chamfer is provided. It is also possible to set as follows.

  However, in this case, the interlock function (shift head) by the interlock member 50 obtained when the shift operation is performed on the fourth forward speed side in a state where the operation amount θ of the select operation is smaller than the set value θ1 by a predetermined amount. 34 and the guide portion 53 of the interlock member 50 are insufficient in contact area between the axial end surfaces where chamfering is not provided, and the interlock function is hindered.

  Therefore, in this case, it is possible to prevent shift stack in a state where the operation amount θ of the select operation when the oblique operation is performed at the time of shifting in the gear stage that simultaneously involves the shift operation and the select operation is greater than or equal to the set value θ1. Although it can be achieved, the interlock function by the interlock member 50 in a state where the operation amount θ of the select operation is smaller than the set value θ1 by a predetermined amount is insufficient, and these cannot be made compatible.

Figure 5 is shows a further embodiment of the operating mechanism of the manual transmission, in this embodiment, instead of performing the inclined chamfered 53s1 provided on the guide portion 53 of the interlock member 50 (taper), A chamfer 34s2 provided on the shift head 34 is inclined (tapered). Therefore, also in this case, when the operation amount θ of the select operation becomes the set value θ1, the shift head 34 and the guide portion 53 of the interlock member 50 are opposed to each other in the axial direction (chamfer 34s2). And a chamfer 53s1 on the guide part 53 side at the axial end surface 53s1 on the guide part 53 side, the radial contour line L1 formed on the axial end surface 53s on the guide part 53 side is the projecting diameter of the arm part 42. Compared to the radial contour line L2 formed on the axial end surface 34s on the shift head 34 side by the chamfer 34s2 on the shift head 34 side with respect to the direction line La, the outer circumferential direction (contour line L2 in FIG. 5). As compared with the protrusion radial direction line La, it is arranged at a position away in the circumferential direction). Therefore, also in this embodiment, it is possible to obtain the same operation effect as the above-described embodiment.

In the above-described embodiment, the chamfers 34 s 2 and 53 s 1 for allowing an oblique operation at the time of gear shifting are provided on the guide portion 53 of the shift head 34 and the interlock member 50 in a gear stage that simultaneously involves a shift operation and a select operation. Although the above-described configuration in which the operational effects are obtained has been implemented in each of the provided embodiments, the configuration in which the above-described operational effects are obtained is the guide portion of the interlock member ( The embodiment in which the chamfering (53s1) for allowing the oblique operation at the time of shifting is provided only in 53) can be performed in the same manner as the above-described embodiment.

Further, in the above-described embodiment, the configuration in which the above-described effects are obtained in the embodiment in which the chamfers 34 s 2 and 53 s 1 provided in the guide portion 53 of the shift head 34 and the interlock member 50 are one-step chamfering has been implemented. However, in the embodiment in which the above-described operation and effect are obtained, the chamfer (34s2 · 53s1) provided in the shift head (34) and the guide part (53) of the interlock member is a multi-stage chamfer having two or more stages. Can also be implemented in the same manner as the above-described embodiment. In this case (when the chamfering is multi-step chamfering), the chamfering on the axial end face (34s / 53s) side is inclined.

  In the above-described embodiment, the present invention is applied to the forward 6-speed / reverse 1-speed manual transmission in which the select position is 4 positions. However, the present invention is, for example, forward 4 in which the select position is 3 positions. The present invention can be similarly applied to other types of manual transmissions, such as a manual transmission for high speed / reverse 1 speed, a forward 8 speed with 5 select positions, and a manual transmission for 1 reverse speed. .

  DESCRIPTION OF SYMBOLS 100 ... Manual transmission, 12 ... Shift select shaft, 14 ... 1st shift fork shaft, 16 ... 2nd shift fork shaft, 18 ... 3rd shift fork shaft, 20 ... Shift lever, 22 ... Select lever, 24 ... Shift operation Lever, 28, 34, 38 ... shift head, 28a, 34a, 38a ... engagement groove, 40 ... inner lever, 41 ... cylindrical part, 42 ... arm part, 50 ... interlock member, 51 ... input part, 52 ... guide Surface, 53, 54 ... guide part, 34s ... Axial end face on the shift head side, 34s2 ... Chamfer, 53s ... Axial end face on the guide part side, 53s1 ... Chamfer, La ... Projecting radial line of arm part, L1: Radial contour formed on the axial end surface on the guide portion side by chamfering on the guide portion side, L2: Shift head side by chamfering on the shift head side Contour in the radial direction are formed in the axial end faces

Claims (1)

It is supported so as to be movable in the axial direction and rotatable around the axis, and is moved in the axial direction by a shift operation force to be moved to a position corresponding to either the neutral position or two shift positions sandwiching it. A shift select shaft that is rotated by a select operation force and moved to at least two select positions;
A shift fork for selectively establishing each shift stage and a shift head for selectively receiving a shift operating force from the shift select shaft are integrally provided, and the shift head is provided on the shaft of the shift select shaft. A plurality of shift fork shafts arranged so as to be movable in the axial direction in parallel with the shift select shaft in a state of being linked in a circumferential direction around the circumference;
An inner lever fixed to the shift select shaft, having an arm portion projecting radially from the shift select shaft, and moving integrally with the shift select shaft;
The inner lever is provided with a pair of guide surfaces that are in slidable contact with each other on both sides in the circumferential direction of the base of the arm portion, and is assembled to be rotatable relative to the inner lever in an axial direction and integrally rotatable. The inner lever is selectively positioned at a rotation position that engages with one of the shift heads provided on each of the plurality of shift fork shafts by being rotated in conjunction with the operation to each select position. And an interlock member that allows the inner lever to move in the axial direction and restrains the shift head not engaged with the inner lever at the neutral position.
The shift head is formed with an engaging groove for receiving the tip of the arm so as to engage with both axial ends of the tip of the arm of the inner lever.
The interlock member sandwiches the engaged shift head, and is fitted in an engagement groove of the non-engaged shift head to constrain the non-engaged shift head to a neutral position. The guide part is provided,
In an operation mechanism of a manual transmission in which the guide portion of the interlock member is provided with a chamfer for allowing an oblique operation at the time of shifting, in a gear stage that simultaneously involves a shift operation and a select operation.
When the operation amount of the selection operation reaches a set value, the axial direction of the guide portion is caused by the chamfering at the axially opposed portion where the guide portion of the shift head and the interlock member are opposed in the axial direction. The radial contour line formed on the end surface is more axially viewed than the radial contour line formed on the axial end surface on the shift head side with respect to the projecting radial line of the arm portion. An operating mechanism for a manual transmission, wherein the chamfer is inclined so as to be disposed on the outer side in the circumferential direction.

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