JP2008232262A - Shift operation device for transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shift operation device for a transmission with simple structure, implementing light shift operation. <P>SOLUTION: The shift operation device 23 comprises: an inner lever 34 which can be moved A in an axial direction of a shift selection shaft 32, can be rotated B around the center 31 of the axis, is selectively engaged with any one of head parts 26a-28a of each shift forks 26-29 by the movement A and the rotation B, and interlocks the shift forks 26-29; and detent devices 38 elastically restricting the rotation B from a neutral rotation position C as a standard, and elastically restricting the rotation B from the predetermined rotation positions D, E after the rotation B at a predetermined angle from the neutral rotation position C to perform positioning. A single fork shaft 25 is provided. The detent devices 38 are respectively disposed to each of portions of the inner lever 34 mutually opposed in a radial direction of the shift selection shaft 32 and a transmission case 2 side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  According to the present invention, in an operation in which an inner lever connected to a shift fork is reciprocally rotated by a shift operation force from the outside, a shift having a detent device that positions the inner lever so as to generate a sense of moderation in the rotating operation. The present invention relates to a gear shift operating device.

  Conventionally, there is a shift operation device for the above-described transmission as disclosed in Patent Document 1 described below. According to this publication, a transmission operation device for a transmission is provided on a fork shaft that is supported so as to be slidable in the axial direction with respect to a transmission case, and is provided to correspond to all the gear positions. A plurality of shift forks that are supported by fixing and in which the respective head portions are collectively arranged at one place, and a shift select shaft that is supported by the transmission case are provided.

  In addition, the speed change operation device includes an inner lever. The inner lever is supported by the shift select shaft, is movable along the axial direction of the shift select shaft, and is rotatable about the axis of the shift select shaft. Further, the inner lever is selectively engaged with the head portion of each shift fork and interlocked with the shift fork by the movement and rotation of the inner lever by the driver's shifting operation force.

  Further, the inner lever is elastically restricted from rotating from the neutral rotation position as a reference, and further rotated from the predetermined rotation position after being rotated by a predetermined angle from the neutral rotation position. There is provided a detent device for elastically regulating and positioning. The detent device includes a recess formed on the outer surface of each shift fork. In addition, the detent device normally includes an engagement body that is supported on the transmission case side and is detachably engaged with the recess, and an elastic body that urges the engagement body to engage with the recess. I have.

When the driver performs a shift operation to obtain a desired gear position with respect to the transmission, the target shift fork is linked with the inner lever to which the shift operation force is input and a predetermined shift fork in the axial direction of the fork shaft is determined. Moved to position. Then, the engaging body biased by the elastic body in the detent device engages with the recess, and further movement of the shift fork is elastically restricted. Further, this regulation indirectly elastically regulates the rotation of the inner lever. The target shift stage is obtained by positioning the shift fork at a predetermined position.
JP 2004-132386 A

  By the way, a plurality of fork shafts in the prior art are provided. For this reason, the shift operation device of the transmission tends to be complicated in structure because of the increased number of components.

  In the conventional technique, the fork shaft is slidably supported in the axial direction with respect to the transmission case as described above, the shift fork is fixedly supported on the fork shaft, and the recess is formed on the outer surface of the shift fork. The engaging body is engaged with the recess by the elastic force of the elastic body. For this reason, this elastic force acts to press the fork shaft against the transmission case via the shift fork.

  Therefore, when the fork shaft is slid with respect to the transmission case together with the shift fork by the shift operation force, the frictional resistance is increased, and accordingly, a large shift operation force is required. There is a risk that the shifting operation may be hindered.

  The present invention has been made paying attention to the above-described circumstances, and an object of the present invention is to provide a transmission operation device for a transmission that has a simple configuration and can be easily changed.

According to the first aspect of the present invention, the fork shaft 25 supported by the transmission case 2 and the fork shaft 25 are provided so as to correspond to all the gear positions, and each head portion 26a-28a is provided at one location. A plurality of shift forks 26-29 arranged in a group, a shift select shaft 32 supported by the transmission case 2, and supported by the shift select shaft 32 and moved along the axial direction of the shift select shaft 32 A and B can be rotated around the axis 31 of the shift select shaft 32, and the movements A and B by the shifting operation force cause the heads 26a-28a of the shift forks 26-29 to move. An inner lever 34 that selectively engages and engages the shift forks 26-29, and the inner lever 34 serves as a reference neutral rotational position. The rotation B from C is elastically restricted, and the rotation B is further restricted from the predetermined rotation positions D and E after a predetermined angle rotation B from the neutral rotation position C. In the transmission operating device of the transmission comprising the detent device 38 for positioning by
A single fork shaft 25 is provided,
In a transmission operation device for a transmission, the detent device 38 is provided between each portion of the inner lever 34 facing each other in the radial direction of the shift select shaft 32 and the transmission case 2 side. is there.

  According to the invention of claim 2, the transmission case 2 includes a case main body 3 and a bracket 5 that is detachably supported by the case main body 3 and supports the shift select shaft 32. The engagement recesses 40 formed in the respective portions of the inner lever 34, the engagement bodies 44 supported by the bracket 5 and detachably engaged with the engagement recesses 40, and the engagement bodies 44 are The transmission operating device for a transmission according to claim 1, further comprising an elastic body (49) that is urged to be engaged with the engaging recess (40).

  The invention of claim 3 is provided with a fastener 53 for fixing the elastic body 49 to the bracket 5, and the inner lever 34 rotates B from the neutral rotation position C to exceed the predetermined rotation positions D and E. 3. The transmission operating device for a transmission according to claim 2, wherein the fastener 53 prevents further rotation B when attempting to do so.

  In this section, the reference numerals appended to the above terms are not to be construed as limiting the technical scope of the present invention to the section “Example” described later or the contents of the drawings.

  The effects of the present invention are as follows.

According to the first aspect of the present invention, there are provided a fork shaft supported by the transmission case, and a plurality of fork shafts which are provided so as to correspond to all the shift speeds and are supported by the fork shaft, and each head portion is collectively arranged at one place. Shift fork, shift select shaft supported by the transmission case, supported by the shift select shaft, movable along the axial direction of the shift select shaft, and around the axis of the shift select shaft The inner lever that selectively engages with the head portion of each shift fork by the movement and rotation by the shift operation force and interlocks the shift fork, and the inner lever serves as a reference. After elastically restricting the rotation from the neutral rotation position, and after a predetermined angle rotation from the neutral rotation position, further from the predetermined rotation position In the speed change device of a transmission and a detent device for positioning to regulate that movement elastically,
Only a single fork shaft is provided.

  For this reason, the number of components of the shift operation device of the transmission is reduced as compared with the prior art in which there are a plurality of fork shafts, and thus the configuration of this shift operation device can be simplified.

  The detent device is provided between each portion of the inner lever facing each other in the radial direction of the shift select shaft and the transmission case side.

  For this reason, when the detent devices elastically position the inner lever at the neutral rotation position or the predetermined rotation position, the elastic forces applied from the detent devices to the inner lever oppose each other in the radial direction of the shift select shaft. Offset. Therefore, it is possible to prevent a frictional resistance from being generated between the inner lever and another member that supports the inner lever.

  As a result, when the inner lever is rotated around the axis of the shift select shaft and is elastically positioned at a desired position by an external speed change operation force to obtain a desired gear position, the speed change operation is performed. Can be made lighter. In addition, a sense of moderation by the detent device is more clearly generated, and a good speed change operation feeling is improved.

  According to a second aspect of the present invention, the transmission case includes a case main body and a bracket that is detachably supported by the case main body and supports the shift select shaft, and each of the detent devices includes the inner lever. An engagement recess formed in each part, an engagement body supported by the bracket and detachably engaged with the engagement recess, and an elastic force for urging the engagement body to engage with the engagement recess With body.

  For this reason, the bracket, the shift select shaft, the inner lever, and the detent device are integrally assembled. And the assembly | attachment to the said case main body of this assembly is achieved only by fixing the bracket of the said assembly to the case main body. Therefore, the assembly operation of the transmission may be performed by first performing the assembly operation of the assembly in a wide work space not affected by the case body, and then assembling the assembly body on the case body as described above. For this reason, the workability of the assembly operation of the transmission is improved.

  According to a third aspect of the present invention, there is provided a fastener for fixing the elastic body to the bracket, and when the inner lever rotates from the neutral rotation position and tries to exceed the predetermined rotation position, the fastener is further rotated. The fastener prevents movement.

  For this reason, the fastener which fixes an elastic body to the said bracket is utilized for the positioning of the said inner lever. Therefore, the number of components of the transmission operation device of the transmission can be reduced correspondingly, and the configuration of the transmission can be further simplified.

  BEST MODE FOR CARRYING OUT THE INVENTION In order to achieve the object of providing a transmission operation device for a transmission that is simple in configuration and capable of lightening a transmission operation, the best mode for carrying out the present invention is provided. Is as follows.

  That is, the transmission operating device of the transmission is provided so as to correspond to all the shift stages and supported by the fork shaft, and the head portions are collectively arranged at one place. A plurality of shift forks, a shift select shaft supported by the transmission case, a shift select shaft supported by the shift select shaft, and movable along the axial direction of the shift select shaft. An inner lever that is rotatable about an axis, selectively engages with a head portion of each shift fork by the movement and rotation by a shift operation force, and interlocks the shift fork. It is elastically restricted from turning from the neutral turning position as a reference, and after turning by a predetermined angle from this neutral turning position, the predetermined turning. And a detent device for positioning and elastically regulated to put al further rotation.

  Only a single fork shaft is provided. Further, the detent device is provided between each portion of the inner lever facing each other in the radial direction of the shift select shaft and the transmission case side.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a transmission mounted on the vehicle, which changes the driving force of the engine so that it can be transmitted to driving wheels. An arrow Fr indicates the front in the traveling direction of the automobile. In addition, the right and left mentioned below shall mean the width direction of the motor vehicle toward the said front.

  The transmission 1 includes a transmission case 2 that constitutes an outer shell thereof and is supported by a vehicle body. The transmission case 2 includes a case main body 3 and a bracket 5 that is detachably fixed to the ceiling plate 4 of the case main body 3 with a fastener.

  The bracket 5 includes a cover plate 8 fixed to the ceiling plate 4 so as to close an opening 7 formed in the ceiling plate 4, an external bracket 9 protruding from the outer surface of the cover plate 8, and the cover plate A pair of left and right opposing plates 10 projecting from the inner surface of 8 through the opening 7 and into the transmission case 2 and facing each other in the left-right direction, and the rear edges of the opposing plates 10 and the cover plate 8 A coupling plate 11 that is integrally coupled to each other, and a bottom plate 12 that integrally couples the lower edges of the opposing plates 10 and the coupling plate 11 to each other are provided.

  In the transmission case 2, a transmission shaft 17 is supported by the transmission case 2 so as to be rotatable around a shaft center 16 extending in the left-right direction. A plurality of speed change gears 18 are supported on the speed change shaft 17 so as to be free to rotate around the axis 16, and a plurality of hubs 19 are supported so as to rotate together with the speed change shaft 17. In addition, in order to obtain a desired forward stage among the gears 18 and the hubs 19, a sleeve 20 is provided for detachably engaging the target gear 18 and the hub 19. Further, in order to obtain the reverse gear, the reverse idle gear 22 is rotated so as to be rotatable around another shaft center (not shown) parallel to the shaft center 16 of the transmission shaft 17 and movable in the axial direction. It is supported by the machine case 2.

  A shift operation device 23 is provided that allows a desired shift stage to be obtained from the above-described shift stages by a manual input of a shift operation force from the outside by the driver. Hereinafter, the shift operation device 23 will be described.

  A single fork shaft 25 is supported by the transmission case 2 so as to be able to reciprocate in the axial direction of an axis 24 parallel to the axis 16 of the transmission shaft 17. A plurality of shift forks supported by the fork shaft 25 and engaged with the sleeve 20 and the reverse idle gear 22 and corresponding to all the above-described gear positions, that is, first and second speed shift forks 26, third, A 4-speed shift fork 27, a fifth-speed shift fork 28, and a reverse shift fork 29 are provided. In each of the shift forks 26-29, the head portions 26a-28a, which are input portions for the speed change operation force, are collectively arranged at one place, and are arranged close to each other so that they are in the upper, middle, and lower stages in this order. .

  Each of the shift forks 26-29 does not necessarily have a branch structure. In short, any shift member that interlocks the heads 26a-28a and the gears 18, 22 may be used.

  A shift select shaft 32 having an axial center 31 extending in the vertical direction is supported by the bracket 5. The shift select shaft 32 is supported across the external bracket 9 and the bottom plate 12 of the bracket 5 so that the shift select shaft 32 can move A in the axial direction and can rotate B around the axis 31. An inner lever 34 fixed to and supported by the fixing pin 33 is provided on the shift select shaft 32. The inner lever 34 can be moved A and rotated B together with the shift select shaft 32.

  Each of the head portions 26a to 28a is arranged vertically as described above along the axial direction of the shift select shaft 32. Due to the movement A and the rotation B of the shift select shaft 32 and the inner lever 34 by the speed change operation force, an engaging portion 35 which is a free end portion of the inner lever 34 is formed in each shift fork 26-29. The shift forks 26-29 engaged with the concave-shaped head portions 26a-28a can be selectively and selectively moved in the axial direction of the fork shaft 25.

  As shown by the solid line in each figure, when the inner lever 34 is positioned at the neutral rotation position C that is the reference around the axis 31 of the shift select shaft 32, the shift forks 26-29 are placed on the inner lever 34. Each of the sleeves 20 and the reverse idle gear 22 that are interlocked with each other is in a neutral state that does not mesh with any of the gears 18.

  The inner lever 34 is elastically restricted from rotating B from the neutral rotation position C, and the inner lever 34 is rotated by a predetermined angle B from the neutral rotation position C to one and the other. A pair of left and right detent devices 38 for positioning the inner lever 34 by elastically restricting further rotation B from the predetermined rotation positions D and E (in FIG. 1, one-dot and two-dot chain line) are provided. . These two detent devices 38 are provided between the portions of the inner lever 34 facing each other in the radial direction of the shift select shaft 32 and the opposing plates 10 of the bracket 5. More specifically, the two detent devices 38 are provided at radial positions symmetrical with respect to the axis 31 of the shift select shaft 32.

  The detent device 38 will be described in more detail.

  As viewed from the line of sight along the axis 31 of the shift select shaft 32 (FIG. 1), each of the portions of the inner lever 34 is formed with a mountain-shaped protrusion 39 that protrudes radially outward. A groove-shaped engaging recess 40 extending in the axial direction of the shift select shaft 32 is formed on the end surface of the projecting end of each projecting portion 39. A pair of engaging slopes 41 are formed on the protruding end face of the protruding portion 39 so as to sandwich the engaging recess 40.

  A through hole 43 is formed in each of the opposing plates 10 of the bracket 5 facing the engaging recess 40 in the left-right direction. Engaging bodies 44 that are detachably engaged with the respective engaging recesses 40 are movably fitted into the through holes 43. The engagement body 44 includes a sphere 45 that directly engages with the engagement recess 40, and a columnar pusher 46 that is disposed on the opposite side of the engagement recess 40 with respect to the sphere 45. Yes.

  An elastic body 49 that biases the engaging body 44 to engage with the engaging recess 40 is provided. The elastic body 49 is formed of a U-shaped leaf spring material that is fitted to both the opposing plate 10 and the coupling plate 11 of the bracket 5 from behind, and is a pair of left and right opposing surfaces facing each other in the left-right direction. A plate 50 and a coupling plate 51 that integrally couples the rear edges of the opposing plates 50 to each other are provided. The coupling plate 51 is fixed to the coupling plate 11 of the bracket 5 with a fastener 53.

  A recess 55 that opens toward the fastener 53 is formed in the rear end surface of the inner lever 34, and a part 53 a of the fastener 53 is inserted into the recess 55. When the inner lever 34 rotates B from the neutral rotation position C and exceeds the predetermined rotation positions D and E, the inner surface of the recess 55 abuts against a part 53 a of the fastener 53. Further rotation B is prevented.

  When the inner lever 34 is located at the neutral rotation position C, the engaging bodies 44 are engaged with the engaging recesses 40 by the urging forces of the opposing plates 50 of the elastic body 49, so that the inner lever 34 is engaged. Is positioned at the neutral rotation position C. Further, the rotation B of the inner lever 34 from the neutral rotation position C is elastically restricted by the urging force of the elastic bodies 49 via the engagement bodies 44.

  Further, when the inner lever 34 is positioned at the predetermined rotation positions D and E, the engagement bodies 44 are pressed against the engagement slopes 41 by the urging force of the opposing plates 50 of the elastic body 49. Engagement and rotation B of the inner lever 34 in the direction away from the neutral rotation position C are prevented by the contact of the inner surface of the recess 55 with the part 53a of the fastener 53, so that the inner lever 34 is Positioned at the predetermined rotational positions D and E. In addition, the rotation B of the inner lever 34 from the predetermined rotation positions D and E toward the neutral rotation position C is elasticized by the urging force of the elastic bodies 49 via the engagement bodies 44. Regulated.

  Only when the inner lever 34 is in the neutral rotation position C, the engaging portion 35 of the inner lever 34 passes through the recesses of the head portions 26a to 28a and can be moved A in the axial direction of the shift select shaft 32. Is done. By this movement A, the engaging portion 35 of the inner lever 34 is selectively engaged with the head portions 26a-28a. At this time, the inner lever 34 is engaged with all the other head portions that are not engaged, and the fork lever having these other head portions is prevented from moving in the axial direction of the fork shaft 25. A movement blocking body 57 is provided.

  The movement blocking body 57 is externally fitted to the inner lever 34 and is movable A in the axial direction of the shift select shaft 32 together with the inner lever 34. The movement blocking body 57 is supported by the shift select shaft 32 so as to be able to rotate B relative to the shift select shaft 32 and the inner lever 34 around the axis 31 of the shift select shaft 32.

  However, the movement blocking body 57 is not rotatable relative to the head portions 26a-28a around the axis 31 of the shift select shaft 32. Specifically, a long hole 58 that extends long in the axial direction of the shift select shaft 32 is formed in the movement blocking body 57. A part 53 a of the fastener 53 passes through the long hole 58. The long hole 58 allows the movement blocking body 57 to move A in the axial direction of the shift select shaft 32 together with the inner lever 34 regardless of the part 53 a of the fastener 53. However, when the movement blocking body 57 attempts to rotate relative to the head portions 26a-28a around the axis 31 of the shift select shaft 32, the part 53a of the fastener 53 and the elongated hole 58 The inner surfaces come into contact with each other in the circumferential direction of the shift select shaft 32 to prevent the relative rotation.

  The upper end portion of the shift select shaft 32 is linked to a shift lever (not shown) via a linkage mechanism 60.

  When the driver operates the shift lever to shift the shift lever so as to obtain a desired gear position, the shift operation force is transmitted to the shift select shaft 32 via the interlock mechanism 60.

  Then, first, the inner lever 34 at the neutral rotation position C is moved A in the axial direction together with the shift select shaft 32, and the engaging portion 35 of the inner lever 34 is moved out of the head portions 26a-28a. Engage with a desired head (select operation). Next, from this engaged state, the inner lever 34 is rotated B around the shaft center 31 together with the shift select shaft 32 to be positioned at one of the predetermined rotational positions D and E. . Then, the fork shaft having the desired head portion is interlocked with the rotation B of the inner lever 34 and is moved in the axial direction of the fork shaft 25 (shift operation). A desired gear stage is obtained by the sleeves 20 and the reverse idle gears 22 that are linked to the sleeves.

  Specifically, the first and fifth shift stages among the first to fifth shift stages, which are forward shift stages, are generated by the movement of the first and second speed shift forks 26 by the engagement of the inner lever 34 with the head portion 26a. Either of these is obtained. Further, any one of the third and fourth shift speeds is obtained by the movement of the third and fourth speed shift forks 27 by the engagement of the inner lever 34 with the head portion 27a. Further, the fifth shift stage is obtained by the movement of the fifth speed shift fork 28 by the engagement of the inner lever 34 with the head portion 28a. Further, the reverse shift stage is obtained by the movement of the reverse shift fork 29 by the engagement of the inner lever 34 with the head portion 28a.

  According to the said structure, the fork shaft 25 provided so that the shift forks 26-29 corresponding to all the gear stages may be supported is single.

  For this reason, the number of components of the speed change operation device 23 of the transmission 1 is reduced as compared with the prior art in which there are a plurality of fork shafts 25. Therefore, the configuration of the speed change operation device 23 can be simplified.

  Further, the detent device 38 is provided between each portion of the inner lever 34 facing each other in the radial direction of the shift select shaft 32 and the transmission case 2 side.

  For this reason, when each detent device 38 elastically positions the inner lever 34 at the neutral rotation position C or the predetermined rotation positions D and E, the elastic force applied from each detent device 38 to the inner lever 34 is the shift. In the radial direction of the select shaft 32, they cancel each other out. Therefore, it is possible to prevent a frictional resistance from being generated between the inner lever 34 and another member that supports the inner lever 34.

  As a result, the inner lever 34 is rotated B around the axis 31 of the shift select shaft 32 by the driver's external speed change operation force to be elastically positioned at a desired position to obtain a desired gear position. In this case, the speed change operation can be made light. Further, the sense of moderation by the detent device 38 is made clearer, and a good speed change operation feeling is improved.

  Further, as described above, the transmission case 2 includes the case main body 3 and the bracket 5 that is detachably supported by the case main body 3 and supports the shift select shaft 32, and each detent device 38 includes: The engagement recesses 40 formed in the respective portions of the inner lever 34, the engagement bodies 44 supported by the bracket 5 and detachably engaged with the engagement recesses 40, and the engagement bodies 44 are connected to the engagement levers 44. And an elastic body 49 that urges the mating recess 40 to be engaged therewith.

  For this reason, the bracket 5, the shift select shaft 32, the inner lever 34, and the detent device 38 are an assembly that is integrally assembled. The assembly of the assembly to the case body 3 is achieved simply by fixing the bracket 5 of the assembly to the case body 3. Therefore, the assembly operation of the transmission 1 is first performed in a wide work space that is not affected by the case body 3 and then the assembly body is assembled to the case body 3 as described above. That's fine. For this reason, the workability of the assembly work of the transmission 1 is improved.

  Further, as described above, the fastener 53 for fixing the elastic body 49 is provided on the bracket 5 so that the inner lever 34 rotates B from the neutral rotation position C and exceeds the predetermined rotation positions D and E. In this case, the fastener 53 prevents further rotation B.

  For this reason, a fastener 53 for fixing the elastic body 49 to the bracket 5 is used for positioning the inner lever 34. Therefore, the number of components of the transmission operation device 23 of the transmission 1 can be reduced correspondingly, and the configuration of the transmission operation device 23 can be further simplified.

  In addition, although the above is based on the example of illustration, the said engaging body 44 may integrate the spherical body 45 and the pushing body 46. FIG. The elastic body 49 may be made of a coil spring or rubber. Further, the engaging recess 40 may be formed in the bracket 5, while the engaging body 44 may be supported by the inner lever 34.

  Three engaging recesses 40 may be provided in parallel to the outer surface of each part of the inner lever 34. Further, the engaging body 44 may be formed by bending each free end of the elastic body 49.

FIG. 4 is a partially enlarged sectional view of FIG. 3. It is a partial expansion perspective view of a transmission. It is a partial plane fragmentary sectional view of a transmission. FIG. 4 is a partial front view of what is shown in FIG. 3. FIG. 5 is a cross-sectional view taken along line VV in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Transmission 2 Transmission case 3 Case main body 5 Bracket 23 Shifting operation device 24 Axle 25 Fork shaft 26 1st, 2nd speed shift fork 26a Head part 27 3rd, 4th speed shift fork 27a Head part 28 5th speed shift fork 28a Head part 29 Reverse shift fork 31 Axle center 32 Shift select shaft 34 Inner lever 35 Engagement part 38 Detent device 39 Protrusion part 40 Engagement recessed part 41 Engagement slope 43 Through-hole 44 Engagement body 49 Elastic body 50 Opposing plate 51 Coupling plate 53 Fastener 53a Part 55 Recess 57 Movement blocking body 58 Long hole A Movement B Rotation C Neutral rotation position D Predetermined rotation position E Predetermined rotation position

Claims (3)

A fork shaft supported by the transmission case, a plurality of shift forks provided to correspond to all gear positions and supported by the fork shaft, and the head portions are collectively arranged at one place, and the shift A shift select shaft supported by the machine case, supported by the shift select shaft, movable along the axial direction of the shift select shaft, and rotatable about the axis of the shift select shaft; An inner lever that selectively engages with the head portion of each shift fork by the movement and rotation by the shift operation force and interlocks the shift fork, and the inner lever rotates from a neutral rotation position as a reference. And elastically restricting further rotation from the predetermined rotation position after a predetermined angle rotation from the neutral rotation position. In the speed change device of a transmission and a detent device for positioning and restricting the,
Only a single fork shaft is provided,
A transmission operation device for a transmission, wherein the detent device is provided between each portion of the inner lever facing each other in the radial direction of the shift select shaft and the transmission case side.   The transmission case includes a case main body and a bracket that is detachably supported by the case main body and supports the shift select shaft, and the detent devices are formed in the respective portions of the inner lever. And a mating recess, an engagement body supported by the bracket and detachably engaged with the engagement recess, and an elastic body that urges the engagement body to engage with the engagement recess. The transmission operation device for a transmission according to claim 1, characterized in that:   A fastener for fixing the elastic body to the bracket is provided, and when the inner lever rotates from the neutral rotation position to exceed the predetermined rotation position, the fastener prevents further rotation. The speed change operation device for a transmission according to claim 2, wherein the speed change operation device according to claim 2 is provided.

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