JP6093150B2 - Shift control structure of transmission - Google Patents

Description

  The present invention mainly relates to a shift control structure for a transmission for an automobile.

  Automobile transmissions receive shift power from the shift lever operation, and the shift fork slides to shift the gear meshed (interlocked) or neutral (unlocked). ) Is made. A plurality of shafts and the like are connected between the shift lever and the shift fork, and shift power is transmitted through the plurality of shafts.

  For example, as shown in the transmission described in Patent Document 1, a detent mechanism is provided on a shaft that transmits shift power. The detent mechanism includes a groove provided in a shaft that transmits shift power, and a sphere that is fitted into the groove. The sphere is pressed against the shaft by a spring, etc., and the sphere fits in the groove according to the displacement of the shaft, or the sphere rolls out of the groove against the biasing force of the spring, and the sphere fits in the groove In the state, a force that restricts the movement of the shaft in the axial direction is applied. Thus, the detent mechanism locks the shaft at a position corresponding to the shift completed state or neutral.

  If the shaft is moved by operating the shift lever while the shaft is locked by the detent mechanism, the sphere goes up the inclined portion of the groove. At this time, since the spring is bent, the biasing force of the spring acting on the shaft via the sphere is increased, and the deterring force for suppressing the displacement of the shaft is increased. The feeling of operation (shift feeling) due to the resistance force received from the shift lever when the driver operates the shift lever is determined by the magnitude of the deterring force. Therefore, for example, the shift feeling is adjusted by the inclination of the inclined portion of the groove.

Japanese Patent Laid-Open No. 5-126254

  In the detent mechanism described above, for example, when switching from the non-interlocking state to the interlocking state, the sphere goes up the inclined portion of the groove. Will go down. That is, the inclined portion of the groove affects both the shift feeling in switching from the non-interlocking state to the interlocking state and the shift feeling in switching from the interlocking state to the non-interlocking state.

  For this reason, if you adjust the shift feeling to be optimal for either switching from the non-linked state to the linked state or switching from the linked state to the unlinked state, the shift feeling is optimized for either one. It was difficult to do.

  Therefore, an object of the present invention is to provide a shift control structure of a transmission that can improve shift feeling in any of a linked state from a non-linked state and a non-linked state to a linked state.

In order to solve the above-mentioned problem, the shift fork of the present invention has a transmission mechanism for transmitting shift power from the shift lever to the shift fork in conjunction with the displacement of the shift lever, and is displaced according to the shift power. Depending on the position, the rotating body connected to the shift fork and the other rotating body rotate together, or the rotating body connected to the shift fork and the other rotating body can rotate relative to each other. The shift control structure of the transmission to be switched to one is arranged in the transmission path of the shift power in the transmission mechanism, and engages a part of the transmission mechanism at a position corresponding to the position of the shift lever in the non-interlocking state. Of the first detent mechanism to stop and the transmission path of the shift power in the transmission mechanism, the shift detent mechanism is more than the first detent mechanism. Disposed over click side, at a position corresponding to the position of the shift fork in the interlocking state, comprising a second detent mechanism for locking a portion of said transmission mechanism, wherein the transmission mechanism includes at least the shift A plurality of shafts including a first shaft relatively positioned on the shift lever side of the power transmission path, and a second shaft positioned relatively on the shift fork side relative to the first shaft; The first detent mechanism includes a sphere, a first locking groove that is provided on the first shaft and holds the sphere in the non-interlocked state, and A pressing means for pressing the sphere against the first locking groove, and a first deterring force for suppressing the axial movement of the first shaft by the force pressing the sphere against the first locking groove. The second detent mechanism includes a sphere, a second locking groove provided on the second shaft and holding the sphere in the interlocked state, and a pressing unit that presses the sphere against the second locking groove. And a second depressing force that depresses the movement of the second shaft in the axial direction by a force that presses the sphere against the second locking groove, and when switching from the non-interlocking state to the interlocking state. the first detent mechanism, prior Symbol allowed to act first deterrent, said second detent mechanism, the second without the action of deterrent, when switching from the interlocking state wherein the non-interlocking condition, the second 2 detent mechanism, by applying a pre-Symbol second deterrent, the first detent mechanism, as well as not to act on the first deterrent, wherein the second shaft in a non-interlocked state is not locked, the interlocking state In the above One shaft is not locked .

The depth of the second locking groove is deeper than the depth of the first locking groove, and the pressing means has a force that presses the sphere against the first locking groove. You may be stronger than the force which presses the said spherical body to a groove | channel .

  According to the present invention, it is possible to improve shift feeling in any of the interlocked state to the non-interlocked state and the non-interlocked state to the interlocked state.

It is a figure which shows the outline of the shift control structure of a transmission. It is the 1st figure for explaining the 1st detent mechanism and the 2nd detent mechanism. It is the 2nd figure for explaining the 1st detent mechanism and the 2nd detent mechanism. It is explanatory drawing for demonstrating a shift feeling.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  FIG. 1 is a diagram showing an outline of the shift control structure 1. As shown in FIG. 1, the shift control structure 1 of this embodiment includes a transmission mechanism 2. The transmission mechanism 2 transmits shift power that is power for shift shifting (gear switching) of the transmission T from the shift lever 3 to the shift forks 4a and 4b in conjunction with the displacement of the shift lever 3.

  A plurality of transmission mechanisms 2 are provided in accordance with the gear stage of the transmission T. Here, as an example, when switching between first speed and second speed, a transmission path for shift power is configured. explain.

  The transmission mechanism 2 includes three shafts 5a, 5b, and 5c arranged in parallel to each other. The shaft 5 a is connected to the shift lever 3 and moves in the axial direction in response to an operation input of the shift lever 3. The shaft 5b is connected to the shaft 5a by a connecting member 6a, and moves in the axial direction integrally with the shaft 5a. The shaft 5b is connected to the shaft 5c by a connecting member 6b, and the shafts 5b and 5c move together in the axial direction. Shift forks 4a and 4b are fixed to the shaft 5c. As the shaft 5c moves in the axial direction, the shift forks 4a and 4b move. As described above, the transmission mechanism 2 constitutes a transmission path of shift power from the shift lever 3 to the shift forks 4a and 4b.

  Here, the transmission mechanism 2 includes the three shafts 5a, 5b, and 5c, but the number of shafts is not limited to this. In any case, the transmission mechanism 2 includes at least a shaft 5a (first shaft) relatively positioned on the shift lever 3 side in the transmission path of shift power, and a shift fork 4a relatively to the shaft 5a. What is necessary is just to have a some shaft including the shaft 5c (2nd shaft) located in the 4b side, and each shaft should be connected via the connection member.

  One end of a shaft 5 a is arranged so as to be connectable to the shift lever 3, and a switching mechanism (not shown) is connected to any of the shafts 5 a of the plurality of transmission mechanisms 2 in accordance with the driver's operation on the shift lever 3. Select whether to connect the lever 3 or not.

  When shift power is transmitted from the shift lever 3 to the shift forks 4a and 4b via the transmission mechanism 2 with the shift lever 3 and the shaft 5a coupled, the shift forks 4a and 4b together with the transmission mechanism 2 are shown in FIG. Move left and right. The shift forks 4a and 4b are engaged with a sleeve (not shown). The sleeve is configured to engage with the shift forks 4a, 4b in an axial direction while being rotatable with respect to the shift forks 4a, 4b. Is moved in the axial direction.

The gear Ta ₁ (rotating body) of the transmission T is rotatably provided with respect to the rotating shaft Tb, and the hub Tc ₁ (rotating body) is fixed to the rotating shaft Tb and rotates integrally with the rotating shaft Tb ( Rotate together). The above-mentioned sleeve rotates integrally with the hub Tc ₁ by spline coupling. The gear Ta ₁ and the sleeve are formed with protrusions on opposing surfaces in the axial direction. When the sleeve is moved in the axial direction by the shift fork 4a, the protrusions engage with each other, and the gear Ta ₁ Rotates integrally with the hub Tc ₁ (rotary shaft Tb) via the sleeve.

Conversely, the sleeve by a shift fork 4a is moved in the axial direction, the engagement of the protrusions are disengaged, the gear Ta ₁ and the hub Tc 1 _(rotation axis Tb) is rotatable relative. Here, for example, the gear Ta ₁ is assumed to rotate integrally with the rotation shaft Tb at the first speed.

The gear Ta ₂ rotates integrally with the rotation shaft Tb at the second speed, and is provided to be rotatable with respect to the rotation shaft Tb. Sleeve is fixed to the rotary shaft Tb hubs Tc 2 of the _(rotor) rotates integrally with the spline coupling and is moved axially by the shift fork 4b, similar to the hub Tc _1, the protruding portion of another engagement Then, the gear Ta ₂ rotates integrally with the hub Tc ₂ (rotary shaft Tb) via the sleeve. On the other hand, when the sleeve is moved in the axial direction by the shift fork 4b and the engagement of the protrusion is disengaged, the gear Ta ₂ and the hub Tc ₂ (rotary shaft Tb) can be rotated relative to each other.

As described above, in the transmission mechanism 2, the hubs Tc ₁ and Tc ₂ and the gears Ta ₁ and Ta ₂ connected to the shift forks 4a and 4b rotate integrally with each other depending on the positions of the shift forks 4a and 4b that are displaced according to the shift power. Is switched to the interlocking state in which the hubs Tc ₁ and Tc ₂ connected to the shift forks 4a and 4b and the gears Ta ₁ and Ta ₂ can rotate relative to each other.

  Further, the shift control structure 1 of the present embodiment is provided with two detent mechanisms, a first detent mechanism 7 and a second detent mechanism 8.

  The first detent mechanism 7 is provided on the transmission path of shift power in the transmission mechanism 2, that is, the shaft 5a disposed on the shift lever 3 side among the plurality of shafts 5a, 5b, and 5c.

  The first detent mechanism 7 includes a sphere 7a, a first locking groove 7b, and a pressing means 7c. The 1st latching groove 7b is provided in the shaft 5a, and hold | maintains the spherical body 7a in a non-interlocking state. The pressing means 7c is composed of an elastic member such as a spring, and is arranged so as to press the sphere 7a against the shaft 5a by elastic force, and presses the sphere 7a into the first locking groove 7b in the non-interlocking state. Thus, the first detent mechanism 7 locks the shaft 5a that is a part of the transmission mechanism 2 at a position corresponding to the position of the shift lever 3 in the non-interlocking state.

  Similarly, the second detent mechanism 8 is provided on the transmission path of shift power in the transmission mechanism 2, that is, the shaft 5c arranged on the shift forks 4a, 4b side among the plurality of shafts 5a, 5b, 5c.

  The second detent mechanism 8 includes a sphere 8a, two second locking grooves 8b, and a pressing means 8c. The second locking groove 8b is provided in the shaft 5c and holds the sphere 8a in the interlocked state. The pressing means 8c is composed of an elastic member such as a spring, and is arranged so as to press the sphere 8a against the shaft 5c by elastic force, and presses the sphere 8a into the second locking groove 8b in the interlocking state. Thus, the second detent mechanism 8 locks the shaft 5c which is a part of the transmission mechanism 2 at a position corresponding to the position of the shift forks 4a and 4b in the interlocking state.

  Hereinafter, the operation of the first detent mechanism 7 and the second detent mechanism 8 when switching from the neutral to the first speed and when switching from the first speed to the neutral will be described in detail.

  FIG. 2 is a first diagram for explaining the first detent mechanism 7 and the second detent mechanism 8. FIGS. 2A and 2B show the first detent mechanism 7 in the axial direction of the shaft 5a. FIG. 2C and FIG. 2D show views of the second detent mechanism 8 viewed from a direction perpendicular to the axial direction of the shaft 5c.

  As shown in FIGS. 2A and 2B, the first detent mechanism 7 has a first deterrent structure 9. The first deterrent structure 9 is constituted by the first locking groove 7b, and the first deterrent structure 9 suppresses the axial displacement of the shaft 5a when switching from the neutral (non-interlocking state) to the first speed (interlocking state). Apply force.

  In the neutral (non-interlocking state), as shown in FIG. 2 (a), the sphere 7a is pressed against the first locking groove 7b by the urging force of the pressing means 7c, whereby the shaft 5a is pressed into the sphere 7a. It is locked by. When the shaft 5a is displaced in the direction indicated by the white arrow in FIG. 2 (a) by the shift power, the sphere 7a resists the urging force of the pressing means 7c and the first locking groove 7b (first deterrent structure 9). Is moved to the position shown in FIG. 2B on the shaft 5a. At this time, when the shaft 5a is initially moved, that is, when the operation of the shift lever 3 is started, the spherical body 7a bends the pressing means 7c so as to get over the first locking groove 7b, and thus acts on the shaft 5a via the spherical body 7a. The urging force of the pressing means 7c to be strengthened increases the deterring force for suppressing the displacement of the shaft 5a.

  Due to the deterring force of the first deterring structure 9, the driver can feel an operational feeling (shift feeling) due to the resistance received from the shift lever 3 when operating the shift lever 3. Thus, when the first detent mechanism 7 is in the neutral (non-interlocking state) by the force that presses the sphere 7a against the first locking groove 7b, the first detent mechanism 7 has a regulating force that regulates the movement of the shaft 5a in the axial direction. In addition, the first deterrence force that suppresses the displacement (movement in the axial direction) of the shaft 5a is applied when switching from the neutral (non-interlocking state) to the first speed (interlocking state).

  Even when the sphere 7a is pressed by the pressing means 7c on a curved surface parallel to the axial direction (not inclined) of the shaft 5a, the frictional force between the sphere 7a and the shaft 5a is the axial direction of the shaft 5a. It acts as a resistance force that suppresses the displacement of. However, this frictional force is not so great as to lock the shaft 5a or affect the shift feeling. In the present embodiment, the deterring force (the first deterring force and the second deterring force described later) is different from the frictional force generated on the curved surface parallel to the axial direction, and is clearly distinguished.

  On the other hand, in the second detent mechanism 8, as shown in FIGS. 2C and 2D, the surface of the shaft 5c against which the sphere 8a is pressed is not a groove but a shaft when in the neutral (non-interlocking state). The curved surface 8d is parallel to the axial direction 5c.

  In the switching from the neutral (non-interlocking state) shown in FIG. 2 (c) to the first speed (interlocking state) shown in FIG. 2 (d), the spherical body 8a has a curved surface 8d and a second locking groove 8b. It will roll on the downward slope. Therefore, although the sphere 8a is pressed against the shaft 5c by the pressing means 8c, the sphere 8a can roll easily, and the second detent mechanism 8 does not act on the shaft 5c (transmission mechanism 2). .

  3 is a second view for explaining the first detent mechanism 7 and the second detent mechanism 8. FIGS. 3A and 3B show the first detent mechanism 7 in the axial direction of the shaft 5a. FIG. 3C and FIG. 3D show views of the second detent mechanism 8 viewed from a direction perpendicular to the axial direction of the shaft 5c.

  As shown in FIGS. 3C and 3D, the second detent mechanism 8 has a second deterrent structure 10. The second deterrent structure 10 is constituted by a second locking groove 8b, and a second deterrent that suppresses axial displacement of the shaft 5c when switching from the first speed (interlocking state) to neutral (non-interlocking state). Apply force.

  In the first speed (interlocking state), as shown in FIG. 3C, the sphere 8a is locked in the second locking groove 8b. Then, the shaft 5c is displaced in the direction indicated by the white arrow in FIG.

  Then, the sphere 8a gets over the inclined portion (vertex) of the second locking groove 8b and rolls to the position shown in FIG. 3D on the shaft 5c. At this time, since the spherical body 8a bends the pressing means 8c so as to get over the second locking groove 8b, the urging force of the pressing means 8c acting on the shaft 5c via the spherical body 8a becomes strong, and the displacement of the shaft 5c is reduced. Deterrence to suppress increases. Thus, when the second detent mechanism 8 is in the first speed (interlocking state) by the force that presses the sphere 8a against the second locking groove 8b, the second detent mechanism 8 has a regulating force that regulates the movement of the shaft 5c in the axial direction. At the same time, a second deterrent that suppresses displacement (movement in the axial direction) of the shaft 5c is applied when switching from the first speed (interlocking state) to neutral (non-interlocking state).

  On the other hand, in the first detent mechanism 7, as shown in FIG. 3A, the surface of the shaft 5a against which the sphere 7a is pressed is not a groove but the axial direction of the shaft 5a when in the first speed (interlocked state). The curved surface 7d is parallel to the surface.

  In switching from the first speed (interlocking state) shown in FIG. 3 (a) to the neutral (non-interlocking state) shown in FIG. 3 (b), the sphere 7a changes from the curved surface 7d to the first locking groove 7b. Roll. At this time, since there is no upward inclined portion from the curved surface 7d to the first locking groove 7b, the first detent mechanism 7 does not act on the shaft 5a (transmission mechanism 2).

  And the 1st detent mechanism 7 latches the shaft 5a in the position corresponding to the position of the shift lever 3 in a neutral (non-interlocking state) because the spherical body 7a is latched by the 1st latching groove 7b.

  FIG. 4 is an explanatory diagram for explaining the shift feeling. On the vertical axis, the resistance received by the driver from the shift lever 3, that is, the first detent mechanism 7 and the second detent mechanism 8 with respect to the transmission mechanism 2. The magnitude of the deterrent is shown, and the horizontal axis shows the position of the shift lever 3 from neutral (non-interlocking state) to first speed (interlocking state). In FIG. 4A, the resistance force that the driver receives from the shift lever 3 when switching from neutral (non-interlocking state) to first speed (interlocking state) is indicated by a one-dot chain line. The resistance force that the driver receives from the shift lever 3 when switching to the neutral (non-interlocking state) is indicated by a broken line.

  As a shift feeling, immediately after the operation of the shift lever 3 is started, a relatively heavy weight (resistance force) is felt with respect to the operation of the shift lever 3, but a smooth operation can be performed from the middle of the operation. Ideal.

  However, in a shift control structure with only one detent mechanism, the shift feeling when switching from neutral (non-interlocking state) to first speed (interlocking state) is optimized as shown by the dashed line in FIG. If the detent mechanism is designed to do this, an ideal shift feeling cannot be reproduced when shifting from the first speed (interlocking state) to neutral (non-interlocking state).

  The shift control structure 1 of the present embodiment includes the first detent mechanism 7 and the second detent mechanism 8 as described above. In switching from neutral (non-interlocking state) to first speed (interlocking state), only the first detent mechanism 7 acts to suppress the displacement of the transmission mechanism 2 and from the first speed (interlocking state) to neutral. In switching to the (non-interlocking state), only the second detent mechanism 8 exerts a deterring force that suppresses the displacement of the transmission mechanism 2.

  Therefore, the shift feeling in switching from neutral (non-interlocking state) to first speed (interlocking state) can be designed by adjusting the shape of the first deterrent structure 9 and the pressing force of the pressing means 7c. Further, the shift feeling in switching from the first speed (interlocking state) to neutral (non-interlocking state) can be designed by adjusting the shape of the second deterrent structure 10 and the pressing force of the pressing means 8c. With such a configuration, it is possible to design the first detent mechanism 7 and the second detent mechanism 8 that give a desired shift feeling to the driver by simple calculation.

  As can be understood with reference to FIGS. 2 and 3, the depth of the second locking groove 8 b of the second restraining structure 10 is deeper than the depth of the first locking groove 7 b of the first restraining structure 9. . In other words, the first locking groove 7b is shallower than the second locking groove 8b. Thus, the reason why the first locking groove 7b is formed shallower than the second locking groove 8b is to prevent interference therebetween. For example, when switching from the neutral (non-interlocking state) to the first speed (interlocking state), the sphere 8a reaches the inclination of the second locking groove 8b before the sphere 7a completely comes out of the first locking groove 7b. To do. Then, while the first detent mechanism 7 is acting on the first detent mechanism 7, the sphere 8 a starts to descend the inclination of the second locking groove 8 b, and thus the second detent mechanism 8 has a force opposite to the first deterrent force. That is, a force that assists switching from the neutral (non-interlocking state) to the first speed (interlocking state) acts. In this way, when opposing forces act simultaneously on the first detent mechanism 7 and the second detent mechanism 8, the design of the optimum shift feeling becomes complicated.

  Therefore, in the present embodiment, the first locking groove 7b is formed shallower than the second locking groove 8b, and one of the spheres 7a and 8a is in the first locking groove 7b and the second locking groove 8b. In some cases, one of the spherical bodies 7a and 8a is not positioned in the first locking groove 7b and the second locking groove 8b. However, if the first locking groove 7b is shallower than the second locking groove 8b for the above reason, the displacement width (deflection amount) of the pressing means 7c is smaller than the displacement width (deflection amount) of the pressing means 8c. The deterrent force provided by the first detent mechanism 7 will be smaller than the deterrent force provided by the second detent mechanism 8.

  Therefore, in the present embodiment, in order to realize an optimal shift feeling, the pressing means 7c, 8c has the force that presses the sphere 7a against the first deterrent structure 9, and the sphere 8a is applied to the second deterrent structure 10. It is designed to be stronger than the pressing force. Specifically, for example, the elastic coefficient of the pressing means 7c (when using a spring as the elastic member, the spring coefficient) is made larger than the elastic coefficient of the pressing means 8c (when using a spring as the elastic member).

  Therefore, in the pressing means 7c, although the displacement width is small, the elastic coefficient is large, and as a result, it is possible to generate the same deterrence as the pressing means 8c. In this way, the shapes of the first deterrence structure 9 and the second deterrence structure 10 and the pressing force of the pressing means 7c and 8c are adjusted. With this configuration, when changing from neutral (non-interlocking state) to the first speed (interlocking state), indicated by a one-dot chain line in FIG. 4 (a), and first speed (interlocking state) indicated by a broken line in FIG. 4 (a). It is possible to reproduce an ideal shift feeling in any of the transition from neutral to neutral (non-interlocking state). In the case where the parts are shared by using the pressing means 7c and 8c having the same elastic modulus, by setting the initial deflection amount of the pressing means 7c to be larger than the initial deflection amount of the pressing means 8c, The set load of the pressing means 7c may be set larger than the set load of the pressing means 8c.

  As described above, since the shift control structure 1 of the present embodiment includes the first detent mechanism 7 and the second detent mechanism 8, the first detent mechanism 7 is a neutral (non-interlocking) shaft 5a on the shift lever 3 side. The second detent mechanism 8 stabilizes the position of the first-speed and second-speed (interlocked) shaft 5c on the shift forks 4a, 4b side. Therefore, in any of the first speed, the second speed (interlocking state), and the neutral (non-interlocking state), it is possible to reliably engage the shift forks 4a and 4b while suppressing the vibration and backlash of the shift lever 3. It becomes possible.

  Further, the first detent mechanism 7 is constituted by a sphere 7a, a first locking groove 7b, a pressing means 7c, and the like, and the second detent mechanism 8 is constituted by a sphere 8a, a second locking groove 8b, a pressing means 8c and the like. Thus, the shift feeling of the driver can be easily adjusted by the depth of the first locking groove 7b and the second locking groove 8b and the strength of the elastic force of the pressing means 7c and the pressing means 8c.

  In the above-described embodiment, the case where the shafts 5a, 5b, and 5c are used as the constituent elements of the transmission mechanism 2 has been described. However, the transmission mechanism 2 is not limited to the cylindrical member, but can be other types such as a prismatic member as long as the shift power can be transmitted. You may comprise using a shaped member.

  In the above-described embodiment, the operations of the first detent mechanism 7 and the second detent mechanism 8 have been described by taking as an example the switching from the neutral to the first speed and the switching from the first speed to the neutral. However, the operations of the first detent mechanism 7 and the second detent mechanism 8 are substantially the same when switching from the neutral to the second speed and when switching from the second speed to the neutral. In this case, according to the displacement of the shift lever 3, it is displaced in the direction opposite to the displacement of the shafts 5a and 5c described in FIGS. 2 and 3, and in FIGS. 9) The left side and left side second locking grooves 8b (second restraining structure 10) act.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiments, and various modifications within the scope of the claims. Needless to say, examples and modifications also belong to the technical scope of the present invention.

  The present invention is mainly applicable to a shift control structure of a transmission for an automobile.

DESCRIPTION OF SYMBOLS 1 ... Shift control structure 2 ... Transmission mechanism 3 ... Shift lever 4a, 4b ... Shift fork 5a, 5b, 5c ... Shaft 7 ... 1st detent mechanism 7a ... Sphere 7b ... 1st latching groove 7c ... Pressing means 8 ... 2nd Detent mechanism 8a ... sphere 8b ... second locking groove 8c ... pressing means

Claims (2)

A rotation mechanism connected to the shift fork according to the position of the shift fork having a transmission mechanism for transmitting shift power from the shift lever to the shift fork in conjunction with the displacement of the shift lever. The shift control structure of the transmission is switched to either an interlocking state in which the body and the other rotating body rotate integrally, or a non-interlocking state in which the rotating body connected to the shift fork and the other rotating body are relatively rotatable. And
A first detent mechanism that is disposed in a transmission path of the shift power in the transmission mechanism and that locks a part of the transmission mechanism at a position corresponding to the position of the shift lever in the non-interlocking state;
Of the transmission path of the shift power in the transmission mechanism, a part of the transmission mechanism is arranged at a position corresponding to the position of the shift fork in the interlocking state, which is arranged closer to the shift fork than the first detent mechanism. A second detent mechanism for locking;
With
The transmission mechanism includes at least a first shaft positioned relatively to the shift lever side of the shift power transmission path, and a second shaft positioned relatively to the shift fork side relative to the first shaft. A plurality of shafts including a connecting member that connects the plurality of shafts,
The first detent mechanism includes a sphere, a first locking groove that is provided on the first shaft and holds the sphere in the non-interlocking state, and a pressing unit that presses the sphere against the first locking groove. And having a first deterring force acting to deter axial movement of the first shaft by a force that presses the sphere against the first locking groove,
The second detent mechanism includes a sphere, a second locking groove that is provided on the second shaft and holds the sphere in the interlocked state, and a pressing unit that presses the sphere against the second locking groove. And a second deterring force that inhibits movement of the second shaft in the axial direction by a force that presses the sphere against the second locking groove,
Wherein when switching from a non-interlocked state to the interlock state, the first detent mechanism, prior Symbol allowed to act first deterrent, said second detent mechanism does not act on the second deterrent,
When switching from the interlocking state wherein the non-interlocking condition, the second detent mechanism, prior Symbol reacted with second deterrent, the first detent mechanism, as well as not to act on the first deterrent,
The shift control structure of a transmission , wherein the second shaft is not locked in the non-linked state, and the first shaft is not locked in the linked state . The depth of the second locking groove is deeper than the depth of the first locking groove, and the pressing means has a force that presses the sphere against the first locking groove. The shift control structure for a transmission according to claim 1 , wherein the shift control structure is stronger than a force that presses the sphere against the groove.

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