JP2007132402A - Transmission shift mechanism interlock - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a transmission shift mechanism interlock which has a simple and easy-to-assemble structure and can exert fully the performance as an interlock and besides can be reduced in cost. <P>SOLUTION: An end of a shift rod 1 and ends of shift plates 8, 9, 10 are allowed to penetrate into an inside of an interlock housing 13 and then a sphere motion regulating members 15, 16 comprising two pins so as to form a sphere moving space 14. Continuously, inside the sphere moving space 14, a plurality of spheres 17, 18, 19 is arranged in a manner to freely move only in the direction of a surface perpendicular to an axis line of the shift rod 1. In the end of the shift rod 1, an engaging depression 20 is arranged that the sphere 18 is engageable with and disengageable from, while in the ends of the shift plates 8, 9, 10, engaging depressions 21, 22, 23 are arranged that the spheres 17, 18, 19 are engageable with and disengageable from. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an interlock device for a shift mechanism of a transmission.

  FIG. 7 shows an example of a conventional shift mechanism of a transmission. A plurality of shift rods 40 (four in the example of FIG. 7) are slidably arranged in the axial direction of the rod with respect to the transmission case 41. Has been.

  A shift head 42 is fitted to each of the shift rods 40, and a shift fork 43 (only one of the four is shown in the example of FIG. 7) is shifted in the axial direction of the shift rod 40. ) And each shift fork 43 is arranged to engage with a shifter sleeve (not shown) of a synchro mechanism mounted on an output shaft for transmitting the output of the engine to the propeller shaft. Yes.

  Above the shift rod 40, a shift select shaft 44 is rotatably arranged with respect to the transmission case 41, and a boss portion 45a of an inner lever 45 slides in the axial direction on the spline portion 44a of the shift select shaft 44. The tip end 45b of the inner lever 45 is engaged with the concave groove 42a of one of the shift heads 42.

  On the other hand, the change lever 46 provided in the driver's seat is mechanically connected to the shift select shaft 44 and the inner lever 45 via connecting means such as a link mechanism, and the inner lever 45 is shifted by operating the change lever 46. The axis is moved on the select shaft 44 in the axial direction, and the groove 42a of the shift head 42 of the desired shift rod 40 to be shifted is engaged with the tip 45b of the inner lever 45 to perform the select operation. The shaft 44 is pivoted about its axis, the inner lever 45 is swung, and the shift rod 40 is moved in the direction of the axis via the shift head 42, thereby moving the corresponding shift fork 43 and the transmission. It is configured to shift gears by meshing the output shaft and the desired gear. To have.

For example, Patent Document 1 shows a general technical level of the shift mechanism of the transmission as described above.
JP-A-7-280090

  However, in the conventional shift mechanism of the transmission as shown in FIG. 7, the top of the shift fork 43 (in the semi-circular shape of the shift fork that holds the shifter sleeve, the outer periphery of the outer periphery that is substantially equidistant from both ends of the fork Since the shift rod 40 is disposed substantially perpendicular to the tangent line of the semicircle, the overall height of the transmission is increased, the degree of mounting is reduced, the weight is increased, and the cost is increased. There was a possibility that it would lead to.

  For this reason, the present inventor has made a shift of the transmission as shown in FIGS. 8 to 10 in order to reduce the overall height of the transmission, improve the degree of freedom of mounting, reduce weight, and reduce cost. The mechanism has been invented and has already been filed (not disclosed at the time of filing this application).

  As shown in FIGS. 8 to 10, the shift mechanism of the transmission already invented by the present inventor is movable relative to the transmission case in the axial direction of the output shaft (not shown) of the transmission. A cylindrical head portion 2a of a shift fork 2 corresponding to a desired gear position (reverse in the example of FIGS. 8 to 10) is fitted to the shift rod 1 disposed at the position using a pin 2b, and the shift is performed. Cylindrical head portions of a plurality of shift forks 3, 4, 5 corresponding to a speed different from the fork 2 (1-2 speed, 3-4 speed, 5-6 speed in the examples of FIGS. 8 to 10). 3a, 4a, and 5a are fitted to the shift rod 1 so as to be slidable in the axial direction, and any one of the shift forks 2, 3, 4, and 5 is selectively inserted into the axis of the shift rod 1. To move in the direction The shift mechanism of the transmission is configured by disposing the selective drive means 6. In this case, the shift rod 1 and the selective drive means 6 are mounted on a vehicle in a vertical plane perpendicular to the axis of the shift rod 1. The shift forks 3, 4, 5 are provided on one side off the top of the shift forks 3, 4, 5, and are substantially within the height range of the shift forks 3, 4, 5 The straight line extending the locus from the tangent line is positioned closer to the center of the semicircular shape of the shift fork formed for gripping the shifter sleeve. The shift fork side is defined as “lower side” and the opposite side is defined as “upper side” with respect to a plane including the movement direction of the inner lever 11 and the movement direction of the shift plate at the time of selection.

  As shown in FIG. 9, the shift rod 1 and the selection drive means 6 are arranged obliquely above as viewed from the center of the semicircles of the shift forks 2, 3, 4 and 5.

  The selection driving means 6 includes a shift plate 7 (corresponding to reverse) having a cylindrical head portion 7a fitted to the shift rod 1 by using a pin 7b, and the shift rod 1 in the axial direction thereof. Shift plates 8, 9, and 10 (corresponding to 1-2, 3-4, and 5-6 speeds) respectively connected to a plurality of shift forks 3, 4, and 5 that are slidably fitted. , Slides in a direction perpendicular to the axis of the shift rod 1, engages with any one of the shift plates 7, 8, 9, 10, and swings in the axial direction of the shift rod 1 to shift the shift plate 7, And an inner lever 11 capable of driving any one of 8, 9, and 10.

  Projecting pieces 3b, 4b, and 5b project upward from the head portions 3a, 4a, and 5a of the shift forks 3, 4, and 5 that correspond to the 1-2 speed, the 3-4 speed, and the 5-6 speed, respectively. The groove portions 8b, 9b, 10b formed on the lower surface side of the shift plates 8, 9, 10 are engaged with the projecting pieces 3b, 4b, 5b, and the shift plate 7 , 8, 9, and 10 are formed with recessed groove portions 7c, 8c, 9c, and 10c, and the inner lever 11 is engaged with the recessed groove portions 7c, 8c, 9c, and 10c.

  The inner lever 11 has a boss portion 11a fitted to the spline portion 12a of the shift select shaft 12 so as to be slidable in the axial direction thereof, and interlocked with an operation of a change lever provided in a driver seat (not shown). Select operation (operation in which the inner lever 11 is slid in the axial direction with respect to the spline portion 12a of the shift select shaft 12) and shift operation (in which the shift select shaft 12 is rotated around the axis to swing the inner lever 11). Operation) is performed.

  In the shift mechanism of the transmission shown in FIGS. 8 to 10, the inner lever 11 is moved in the axial direction with respect to the spline portion 12 a of the shift select shaft 12 by operating a change lever provided in a driver seat (not shown). Slide to select one of the concave grooves 7c, 8c, 9c, 10c of the shift plate 7, 8, 9, 10 and the tip of the inner lever 11 to engage, then shift select shaft When the inner lever 11 is swung by rotating the shaft 12 about its axis, and any one of the shift plates 7, 8, 9 and 10 is moved in the axial direction of the shift rod 1, a shift operation is performed. The corresponding shift fork (any one of 2, 3, 4 and 5) moves, and the output shaft of the transmission meshes with the desired gear. Shift is performed Te.

  For example, as the select operation, the inner lever 11 is slid in the axial direction with respect to the spline portion 12a of the shift select shaft 12, the concave groove portion 7c of the shift plate 7 and the tip end portion of the inner lever 11 are engaged, and then the shift operation is performed. When the shift select shaft 12 is rotated about its axis to swing the inner lever 11, and the shift plate 7 is moved in the axial direction of the shift rod 1, the shift rod 1 itself slides in the axial direction. The shift fork 2 fitted to the shift rod 1 moves integrally therewith, and switching to the reverse range is performed. At this time, the shift forks 3, 4, 5 stay at the neutral position and move together with the shift rod 1 because the projecting pieces 3 b, 4 b, 5 b are restrained by the shift plates 8, 9, 10. Never do.

  On the other hand, as the select operation, the inner lever 11 is slid in the axial direction with respect to the spline portion 12a of the shift select shaft 12, the concave groove portion 8c of the shift plate 8 and the tip end portion of the inner lever 11 are engaged, and then the shift operation is performed. When the shift select shaft 12 is rotated about its axis to swing the inner lever 11 and the shift plate 8 is moved in the axial direction of the shift rod 1, the shift fork 3 moves relative to the shift rod 1. Slide in the axial direction to switch to 1st speed or 2nd speed.

  Further, as the select operation, the inner lever 11 is slid in the axial direction with respect to the spline portion 12a of the shift select shaft 12, the concave groove portion 9c of the shift plate 9 and the tip end portion of the inner lever 11 are engaged, and then the shift operation is performed. When the shift select shaft 12 is rotated about its axis to swing the inner lever 11 and the shift plate 9 is moved in the axial direction of the shift rod 1, the shift fork 4 moves relative to the shift rod 1. Slide in the axial direction to switch to 3rd speed or 4th speed.

  Further, as the select operation, the inner lever 11 is slid in the axial direction with respect to the spline portion 12a of the shift select shaft 12, the concave groove portion 10c of the shift plate 10 and the tip end portion of the inner lever 11 are engaged, and then the shift is performed. As an operation, when the shift select shaft 12 is rotated about its axis to swing the inner lever 11 and the shift plate 10 is moved in the axial direction of the shift rod 1, the shift fork 5 is moved relative to the shift rod 1. It slides in the axial direction and is switched to the fifth speed or the sixth speed.

  As shown in FIG. 9, the shift rod 1 and the selective drive means 6 are on one side separated from the tops of the shift forks 3, 4, 5 when mounted in a vertical plane perpendicular to the axis of the shift rod 1. Since the shift rod 1 and the selection drive means 6 are substantially within the height range of the shift forks 3, 4 and 5, the shift forks 2, 3, 4 and 5 are arranged obliquely above the shift forks 2. The overall height of the machine will be lowered, the degree of freedom of mounting will increase, and an increase in weight and cost will be avoided.

  By the way, in the case of the shift mechanism of the transmission as shown in FIGS. 8 to 10, when any one of the shift plates 7, 8, 9, 10 is slid in the axial direction of the shift rod 1, It is necessary to provide a so-called interlock device for restricting sliding of the shift plate in the axial direction so as to hold the remaining shift plate in a neutral position. However, a specific structure of the interlock device has been developed. The current situation was not.

  In view of such circumstances, the present invention provides an interlock device for a shift mechanism of a transmission, which has a simple structure with good assemblability, can sufficiently function as an interlock device, and can achieve cost reduction. It is something to be offered.

The present invention is provided with a shift rod fitted with a shift fork corresponding to a desired shift speed and disposed so as to be movable in the axial direction, and fitted so as to be slidable in the axial direction with respect to the shift rod. A plurality of shift forks corresponding to gears different from the shift fork, a shift plate having a head portion fitted to the shift rod, and a fitting so as to be slidable in the axial direction with respect to the shift rod. An interlock device for a shift mechanism of a transmission, comprising: a shift plate connected to each of a plurality of shift forks, and an inner lever capable of driving any one of the shift plates,
An end portion of the shift rod and an end portion of a shift plate other than the shift plate having a head portion fitted to the shift rod are passed through an interior of the interlock housing fixedly disposed. A spherical movement restricting member is disposed between the end of the shift rod and the end of the shift plate inside so as to form a spherical moving space, and the spherical movement restricting member and the end of the shift rod A plurality of spheres are movably disposed only in a plane direction perpendicular to the axis of the shift rod in a sphere moving space formed between the end of the shift plate and the end of the shift rod and the shift plate. At the end of the, an engagement recess that can engage and disengage the sphere is formed.
When any one of the shift rod or the shift plate is slid in the axial direction, the sphere is released from the engagement recess of any one of the slid shift rod or the shift plate, and By engaging the sphere with the other engaging recess, it is possible to restrict sliding in the axial direction other than one of the slidable shift rod or the shift plate and hold them in the neutral position. The present invention relates to an interlock device for a shift mechanism of a transmission characterized by being configured as described above.

  In the case of the interlock device for the shift mechanism of the transmission, when the shift rod is slid in the axial direction, the sphere is detached from the engagement recess of the shift rod, and the sphere is placed in the engagement recess of the shift plate other than the shift rod. Is engaged, the sliding of the shift plate other than the shift rod in the axial direction is restricted, and they are held in the neutral position.

  Further, when any one of the shift plates is slid in the axial direction, the sphere is detached from the engaging recess of the shift plate, and the sphere is engaged with the engaging recesses of the other shift plate and shift rod. By combining, the shifting of the shift plate and the shift rod in the axial direction is restricted, and they are held in the neutral position.

  According to the interlock device for a shift mechanism of a transmission according to the present invention, an excellent effect of being able to sufficiently exhibit the function as an interlock device with a simple and well-assembled structure and to achieve cost reduction. Can be played.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  1 to 6 show an example of an embodiment of the present invention. In the figure, the same reference numerals as those in FIGS. 8 to 10 denote the same components, and the basic configuration is shown in FIGS. 10 is the same as that shown in FIG. 10, but the feature of the illustrated example is that, as shown in FIGS. 1 to 6, the end of the shift rod 1 The end portions of the shift rods 1 other than the shift plate 7 having the head portion 7a fitted to the shift rod 1 are penetrated and the end portions of the shift rod 1 inside the interlock housing 13 Between the end portions of the shift plates 8, 9, and 10, spherical movement restricting members 15 and 16 composed of two pins are disposed so that the spherical moving space 14 is formed, and the spherical movement restricting members are arranged. 15, 16 and end of shift rod 1 In the spherical moving space 14 formed between the end portions of the shift plates 8, 9, and 10, a plurality of (first, second, and third three in the illustrated example) spheres 17, 18, and 19 are provided. Is disposed so as to be movable only in a direction perpendicular to the axis of the shift rod 1, and an engaging recess 20 is formed at the end of the shift rod 1 to which the second sphere 18 can be engaged and disengaged. An engaging recess 21 in which the first sphere 17 can be engaged and disengaged is formed at the end of the plate 8, and the first sphere 17, the second sphere 18, and the third sphere 17 are formed at the end of the shift plate 9. An engagement recess 22 that can be engaged / disengaged with the sphere 19 is formed, and an engagement recess 23 that can be engaged / disengaged with the third sphere 19 is formed at the end of the shift plate 10.

  The interlock housing 13 has two plate-like blocks 24 and 24 arranged at intervals substantially equal to the outer diameters of the spheres 17, 18 and 19 having substantially the same diameter, and connected by a top plate. The block facing surfaces are fixed in parallel, and the spherical movement restriction members 15 and 16 are attached so as to span between the plate blocks 24 and 24. Further, the end portions of the shift rod 1 are passed through the plate blocks 24 and 24. For this purpose, a through-round hole 25 is formed, and through-angle holes 26, 27, 28 for passing through the end portions of the shift plates 8, 9, 10 are provided.

  Further, the end portion of the shift plate 8 is formed with a notch 29 that is partially cut away so that the lower end surface thereof is positioned higher than the height position of the lower end surface of the shift plate 9 by a required amount. An inclined relief groove 30 for the first sphere 17 is formed by cutting away the corner on the side facing 9 over a required range.

  Furthermore, the end portion of the shift plate 10 is notched in the same manner as the shift plate 8 so that the lower end surface thereof is partially cut away from the height position of the lower end surface of the shift plate 9 by a required amount. In addition to forming the portion 31, an inclined relief groove 32 for the third sphere 19 is formed by cutting away the corner on the side facing the shift plate 9 over a required range.

  Next, the operation of the illustrated example will be described.

  In the neutral state, the second spherical body 18 is engaged with the engagement recess 20 of the shift rod 1 (see FIGS. 1 and 2A, 2E), and the engagement recess 21 of the shift plate 8 is engaged with the first recess 21. The first sphere 17 and the third sphere 19 are engaged with the engagement recess 22 of the shift plate 9 (see FIG. 1 and FIGS. 2A and 2B). 1 and FIGS. 2 (a) and 2 (c)), the third spherical body 19 is engaged with the engagement recess 23 of the shift plate 10 (see FIGS. 1 and 2 (a) and (d)). The sliding of the shift rod 1 and the shift plates 8, 9, 10 in the axial direction is restricted, and they are held in the neutral position.

  When the shift rod 1 is slid in the axial direction as shown in FIG. 3 (e), for example, to switch to the reverse range from the neutral state, the engagement recess 20 of the shift rod 1 changes from the engagement recess 20. The second sphere 18 is separated so as to be pushed out, and the second sphere 18 is engaged with the engagement recess 22 of the shift plate 9 (see FIGS. 3A and 3C) and adjacent to both sides. By pushing away the first sphere 17 and the third sphere 19, the movement of the first sphere 17 and the third sphere 19 is restricted by the movement restriction members 15, 16 for the sphere, and the engagement of the shift plates 8, 10. Engaging with the concavities 21 and 23 (see FIGS. 3A, 3B, and 3D), the slide of the shift plates 8, 9, 10 other than the shift rod 1 in the axial direction is restricted. , Keep them in neutral position It is.

  Further, when the shift plate 8 is slid in the axial direction as shown in FIG. 4B in order to switch from the neutral state to, for example, the first speed or the second speed, the engagement of the shift plate 8 is increased. The first sphere 17 is separated from the joint recess 21 so as to be pushed out, and is engaged with the engagement recess 22 of the shift plate 9 while contacting the inclined escape groove 30 (see FIGS. 3A and 3C). When the first sphere 17 pushes away the adjacent second sphere 18, the second sphere 18 engages with the engagement recess 20 of the shift rod 1 (see FIGS. 3A and 3E). And the third sphere 19 is engaged with the engagement recess 23 of the shift plate 10 while being restricted by the sphere movement restricting member 16 (see FIGS. 3A and 3B). d)), thereby the shaft of the shift rod 1 The slide of the slide and the axial direction of the shift plates 9 and 10 in the direction is restricted, they are held at the neutral position.

  Furthermore, when the shift plate 9 is slid in the axial direction as shown in FIG. 5C in order to switch from the neutral state to, for example, 3rd speed or 4th speed, the shift plate 9 The first sphere 17 and the third sphere 19 are separated from the engagement recess 22 so as to be pushed out, and the movement is restricted by the sphere movement restricting members 15, 16. While engaging (refer FIG. 5 (a), (b), (d)), the 2nd spherical body 18 engages with the engagement recessed part 20 of the shift rod 1 (refer FIG. 5 (a), (e)). Thus, the slide of the shift rod 1 in the axial direction and the slide of the shift plates 8 and 10 in the axial direction are restricted, and they are held in the neutral position.

  Further, when the shift plate 10 is slid in the axial direction as shown in FIG. 6D in order to switch from the neutral state to, for example, the fifth speed or the sixth speed, the engagement of the shift plate 10 is increased. The third sphere 19 is separated from the joint recess 23 so as to be pushed out, and is engaged with the engagement recess 22 of the shift plate 9 while contacting the inclined escape groove 32 (see FIGS. 6A and 6C). When the third sphere 19 pushes away the adjacent second sphere 18, the second sphere 18 engages with the engagement recess 20 of the shift rod 1 (see FIGS. 6A and 6E). And the first sphere 17 is engaged with the engagement recess 21 of the shift plate 8 while the movement of the first sphere 17 is restricted by the sphere movement restricting member 15 (see FIGS. 6A and 6B). b)), and thus the shift rod 1 And a slide to the slide and the axial direction of the shift plates 8,9 in the line direction is restricted, they are held at the neutral position. The distance between the spherical movement restricting members 15 and 16 and the tops (the deepest recessed positions) of the engaging recesses 21 and 23 is shorter than the outer diameter of the spherical bodies 17 and 19. 8 and 10 are prevented from escaping to the outside (opposite side of the central shift plate 9).

  As a result, when any one of the shift rod 1 or the shift plates 8, 9, 10 is slid in the axial direction, the slid of the shift rod 1 or the shift plates 8, 9, 10 Regulating the sliding in the axial direction other than any one and holding them in the neutral position is extremely simple and requires only three spheres 17, 18, and 19 disposed inside the interlock housing 13. The structure can be realized with a good assemblability, and the cost can be kept low.

  In this way, the function as an interlock device can be sufficiently exerted with a simple structure with good assemblability, and the cost can be reduced.

  The interlock device for the shift mechanism of the transmission according to the present invention is not limited to the above-described illustrated example, and the shift fork fitted to the shift rod is not limited to the reverse one, but other than that. Needless to say, various changes can be made without departing from the scope of the present invention, such as a shift fork corresponding to the above-mentioned shift speed.

It is a side view which shows the neutral state in an example of embodiment which implements this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the neutral state in an example of embodiment which implements this invention, Comprising: (a) is a partially cutaway rear view (IIa-IIa arrow equivalent view of FIG. 1), (b) is 1-2 speed (C) is a side view showing the positional relationship between the shift plate corresponding to 3-4 speed and the first sphere, and (d) is a side view showing the positional relationship between the shift plate corresponding to 3-4 speed and the first sphere. FIG. 5E is a side view showing the positional relationship between the shift plate corresponding to the 5th to 6th speed and the third sphere, and FIG. 5E is a side view showing the positional relationship between the shift rod corresponding to the reverse and the second sphere. It is a general | schematic block diagram which shows the reverse shift state in an example of embodiment which implements this invention, Comprising: (a) is a partially cutaway rear view, (b) is the shift plate corresponding to 1st-2 speed, the 1st spherical body, (C) is a side view showing the positional relationship between the shift plate corresponding to 3-4 speed and the second sphere, (d) is a shift plate corresponding to 5-6 speed and The side view which shows the positional relationship with a 3rd spherical body, (e) is a side view which shows the positional relationship between the shift rod corresponding to reverse, and a 2nd spherical body. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the 1-2 speed shift state in an example of embodiment which implements this invention, Comprising: (a) is a partially cutaway rear view, (b) is the shift plate and 1st corresponding to 1-2 speed. (C) is a side view showing the positional relationship between the shift plate corresponding to 3-4 speed and the first sphere, and (d) is a shift corresponding to 5-6 speed. The side view which shows the positional relationship of a plate and a 3rd sphere, (e) is a side view which shows the positional relationship of the shift rod corresponding to reverse, and a 2nd sphere. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the 3-4 speed shift state in an example of embodiment which implements this invention, Comprising: (a) is a partially cutaway rear view, (b) is the shift plate and 1st corresponding to 1-2 speed. (C) is a side view showing the positional relationship between the shift plate corresponding to 3-4 speed and the first sphere, and (d) is a shift corresponding to 5-6 speed. The side view which shows the positional relationship of a plate and a 3rd sphere, (e) is a side view which shows the positional relationship of the shift rod corresponding to reverse, and a 2nd sphere. BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the 5-6 speed shift state in an example of embodiment which implements this invention, Comprising: (a) is a partially cutaway rear view, (b) is the shift plate and 1st corresponding to 1-2 speed. (C) is a side view showing the positional relationship between the shift plate corresponding to 3-4 speed and the third sphere, (d) is a shift corresponding to 5-6 speed. The side view which shows the positional relationship of a plate and a 3rd sphere, (e) is a side view which shows the positional relationship of the shift rod corresponding to reverse, and a 2nd sphere. It is a schematic block diagram which shows an example of the shift mechanism of the conventional transmission. It is a perspective view which shows the shift mechanism of the transmission which this inventor invented and has already applied. FIG. 9 is a rear view showing the shift mechanism of the transmission that has been invented by the present inventor, and is a view corresponding to IX-IX in FIG. 8. It is a top view which shows the shift mechanism of the transmission which this inventor invented and has already applied, Comprising: It is an XX arrow equivalent view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Shift rod 2 Shift fork 3 Shift fork 4 Shift fork 5 Shift fork 7 Shift plate 8 Shift plate 9 Shift plate 10 Shift plate 11 Inner lever 13 Interlock housing 14 Sphere movement space 15 Sphere movement restriction member 16 Sphere movement restriction member 17 Sphere 18 Sphere 19 Sphere 20 Engagement recess 21 Engagement recess 22 Engagement recess 23 Engagement recess

Claims (1)

A shift rod fitted with a shift fork corresponding to a desired gear position and arranged so as to be movable in the axial direction, and fitted to the shift rod so as to be slidable in the axial direction, and the shift fork Is a plurality of shift forks corresponding to different shift stages, a shift plate having a head portion fitted to the shift rod, and a plurality of pieces fitted so as to be slidable in the axial direction with respect to the shift rod. An interlock device for a shift mechanism of a transmission comprising a shift plate connected and arranged to each shift fork, and an inner lever capable of driving any one of the shift plates,
An end portion of the shift rod and an end portion of a shift plate other than the shift plate having a head portion fitted to the shift rod are passed through an interior of the interlock housing fixedly disposed. A spherical movement restricting member is disposed between the end of the shift rod and the end of the shift plate inside so as to form a spherical moving space, and the spherical movement restricting member and the end of the shift rod A plurality of spheres are movably disposed only in a plane direction perpendicular to the axis of the shift rod in a sphere moving space formed between the end of the shift plate and the end of the shift rod and the shift plate. At the end of the, an engagement recess that can engage and disengage the sphere is formed.
When any one of the shift rod or the shift plate is slid in the axial direction, the sphere is released from the engagement recess of any one of the slid shift rod or the shift plate, and By engaging the sphere with the other engaging recess, it is possible to restrict sliding in the axial direction other than one of the slidable shift rod or the shift plate and hold them in the neutral position. An interlock device for a shift mechanism of a transmission characterized by being configured as described above.

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