JP2012007672A - Shift-and-select shaft assembly of transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely restrain occurrence of double shift resulting from a double selection state by improving the rigidity of an interlock plate in a shift-and-select (S&S) shaft assembly.SOLUTION: The assembly includes an S&S shaft 20 in which an inner lever 21 is formed, and an interlock plate 30 provided with a base plate 31 taken along a select direction. An opening 31a extending along the select direction is provided at the central part in a shift direction of the base plate 31. The slit parts 31b in which the pair of slits S, S are provided at specific positions (two points) of the select direction in the base plate 31. In the specific position, the inner lever 21 is disposed movably to the shift direction in the inner space of the opening 31a. A pair of side faces along the select direction of the opening 31a achieve an interlock function. In the slit parts 31b, both ends of the shift direction are connected to the select direction.

Description

  The present invention relates to a shift and select shaft assembly that is assembled and fixed to a case of a transmission for a vehicle. Hereinafter, the “shift and select shaft” may be referred to as “S & S shaft”.

  2. Description of the Related Art Conventionally, an S & S shaft assembly that is assembled and fixed to a case of a manual transmission for a vehicle is widely known (for example, see Patent Document 1). As an example of such an S & S shaft assembly, the present applicant has conventionally manufactured an S & S shaft assembly 100 shown in FIG.

  The S & S shaft assembly 100 shown in FIG. 12 includes a fixing member 110 that is fixed to a transmission case, an S & S shaft 120, and an interlock plate 130. In FIG. 12, a portion indicated by fine dots corresponds to the interlock plate 130 (the same applies to other drawings). The shape of the interlock plate 130 alone is as shown in FIG.

  Hereinafter, a vehicle in which the shift lever is operated in the pattern shown in FIG. 14, that is, a vehicle having six shift stages for forward movement and one shift stage for backward movement is assumed. In the pattern shown in FIG. 14, the position of the point o is referred to as “neutral position”. The positions of the points a, b, c, d, e, f, and g are respectively set to “first speed shift position”, “second speed shift position”, “third speed shift position”, “fourth speed shift position”, and “fifth speed”. These are called “shift position”, “6-speed shift position”, and “reverse shift position”. The positions of the points h, i, and j are referred to as “LOW select position”, “HIGH select position”, and “reverse select position”, respectively. In FIG. 14, the shift lever is in the neutral position. Hereinafter, the horizontal operation of the shift lever in FIG. 14 is referred to as “select operation”, and the vertical operation of the shift lever in FIG. 14 is referred to as “shift operation”.

  Referring to FIG. 12 again, the S & S shaft 120 acts on the fixed member 110 by a driving force received from a power transmission member (not shown) connected to the protrusion 111 in response to a selection operation of the shift lever. It is supported by the fixing member 110 so as to move in the axial direction. Further, the S & S shaft 120 rotates around the axis with respect to the fixed member 110 by a driving force received from a power transmission member (not shown) connected to the protrusion 112 according to a shift operation of the shift lever. Thus, it is supported by the fixing member 110. The S & S shaft 120 is fixedly provided with an inner lever 121 (two in this example) that protrudes radially outward.

  The interlock plate 130 moves in the axial direction with respect to the fixed member 110 along with the axial movement of the S & S shaft 120, and cannot rotate about the axis with respect to the fixed member 110. It is supported.

  The interlock plate 130 includes a flat board portion 131 that extends along the axial direction. The substrate portion 131 is formed with slits 132 (two in this example) extending in a direction perpendicular to the axial direction. Each slit 132 completely divides the substrate portion 131 in the axial direction. Each inner lever 121 protrudes from the corresponding slit 132 through the inside of the corresponding slit 132 so as to be movable in a direction perpendicular to the axial direction. Hereinafter, the “axial direction” is sometimes referred to as “select direction”, and the “direction perpendicular to the axial direction” is sometimes referred to as “shift direction”.

  As described above, according to the selection operation of the shift lever, each inner lever 121 and the interlock plate 130 move together in the selection direction with respect to the fixing member 110. On the other hand, according to the shift operation of the shift lever, each inner lever 121 moves in the shift direction with respect to the fixing member 110, while the interlock plate 130 does not move in the shift direction.

  The S & S shaft assembly described above is assembled and fixed to the case of the manual transmission. When the manual transmission is assembled, shift fork heads (hereinafter referred to as “heads”) 221 to 224 fixed to the fork shafts 211 to 214 are arranged in the select direction, as schematically shown in FIG. A plurality (four in this example) are arranged in parallel along the line. The heads 221 to 224 are a 3rd to 4th shift head, a 1st to 2nd shift head, a 5th to 6th shift head, and a reverse head, respectively. For each head, the position shown in FIG. 15 is referred to as a “neutral position”.

  Respective concave portions formed in the heads 221 to 224 engage with the inner lever 121 or the interlock plate 130 (specifically, the substrate portion 131) in the shift direction. Then, the head to be engaged with the inner lever 121 is selected by the selection operation of the shift lever. Hereinafter, “selection” for a certain head refers to a state in which the head is to be engaged with the inner lever 121.

  For example, as shown in FIG. 15, in a state where the shift lever is in the neutral position, the inner lever 121 (upper side in the drawing) is engaged with one head 221. That is, one head 221 is selected. In this state, the manual transmission is in a neutral state. In this state, when the shift lever is operated to the third speed shift position, as shown in FIG. 16, the inner lever 121 pushes the concave portion of the head 221 in the shift direction (left direction in the figure), thereby causing the head 221 ( Therefore, the fork shaft 211) moves from the neutral position to the shift completion position along the shift direction (left direction in the figure). As a result, the manual transmission enters the third speed shift state.

  Similarly, as shown in FIG. 17, when the shift lever is operated to the first speed shift position via the LOW select position, one head 222 is selected and the head 222 (and hence the fork shaft 212) is shifted from the neutral position. It moves to the shift completion position along the direction (left direction in the figure). As a result, the manual transmission is in the first speed shift state.

  On the other hand, as shown in FIGS. 15 to 17, the recesses of the remaining unselected heads are engaged with the interlock plate 130 (131). As described above, the interlock plate 130 does not move in the shift direction. Therefore, even if an external force in the shift direction is applied to the unselected head for some reason, movement of the unselected head in the shift direction is restricted (prohibited). In this way, the interlock plate 130 (131) achieves a function (interlock function) for fixing the unselected head in the neutral position.

  Thus, when the shift lever is operated along the pattern shown in FIG. 14 (in the case of normal operation), one head is selected, and the remaining heads are interlocked by the interlock function of the interlock plate 130 (131). Fixed in neutral position. On the other hand, actually, the shift lever may be operated in a pattern deviated from the pattern shown in FIG. 14 (in the case of an abnormal operation). In this case, two heads can be selected simultaneously (double selection state). Hereinafter, the case where the shift lever is pressed from the position between the neutral position and the LOW select position toward the third speed shift position (or the first speed shift position) will be considered with reference to FIG.

  In the example shown in FIG. 18, two heads 221 and 222 are selected for the inner lever 121 (upper side in the drawing) (double selection state). In this example, the head 221 is not engaged with the interlock plate 130 (131), while the head 222 is engaged with the interlock plate 130 (131). Therefore, even if the heads 221 and 222 are pushed in the shift direction (left direction in the figure) by the inner lever 121 (upper side in the figure), the movement of the head 222 in the shift direction is restricted, so that the inner lever 121, In addition, movement of the heads 221 and 222 in the shift direction is restricted.

  Thus, according to the interlock function of the interlock plate 130 (131), the phenomenon that the two heads simultaneously move to the shift completion position due to the double selection state (hereinafter referred to as “double shift”). ) Is suppressed.

  By the way, as described above, the slits 132 formed in the substrate part 131 of the interlock plate 130 completely divide the substrate part 131 in the select direction. Due to this, the rigidity of the substrate 131 is relatively low. Accordingly, in the double selection state shown in FIG. 18, when the shift lever is pressed with a relatively strong force toward the third speed shift position (or the first speed shift position), as shown in FIG. The portion engaged with the head 222 in FIG. 6 may be deformed greatly by receiving a relatively strong force in the shift direction (left direction in the drawing) from the head 222. In this case, there is a problem that the interlock function described above cannot be normally performed and a double shift may occur due to the double selection state.

JP 2009-121656 A

  In view of the above, the object of the present invention is to improve the rigidity of the interlock plate in the S & S shaft assembly provided with the interlock plate, and reliably suppress the occurrence of double shift due to the double selection state. To provide things.

  An S & S shaft assembly according to the present invention includes a fixing member fixed to a case (housing) of a transmission, an S & S shaft, and an interlock plate. The S & S shaft is arranged so as to move in the axial direction (select direction) with respect to the fixed member in response to a select operation and to rotate about the axis with respect to the fixed member in response to a shift operation. An inner lever that projects radially outward is fixed to the S & S shaft.

  The interlock plate moves in the axial direction (select direction) with respect to the fixed member as the S & S shaft moves in the axial direction (select direction) and is non-rotatable around the axis with respect to the fixed member. The

  In this S & S shaft assembly, one shift fork head in which a recess of the head engages with the inner lever among a plurality of shift fork heads arranged in parallel along the axial direction (select direction) in response to the select operation. Can be selected. In response to the shift operation, the inner lever moves the shift fork head along the shift direction by pushing the recess of the selected one shift fork head in a shift direction perpendicular to the axial direction. Corresponding gears are achieved.

  The characteristics of this S & S shaft assembly are as follows. That is, the interlock plate includes a flat plate-like substrate portion that extends along the axial direction (select direction). An opening extending along the axial direction is provided in a central portion of the substrate portion in the shift direction. A slit portion is provided at a specific position in the axial direction of the substrate portion. The slit portion is formed with a pair of slits extending in the shift direction from a pair of side surfaces along the axial direction of the opening toward a corresponding end portion of the substrate portion in the shift direction. Either one or both ends of the slit portion in the shift direction are coupled in the axial direction.

  The inner lever is arranged to be movable in the shift direction in the internal space of the opening at the specific position in the axial direction (select direction) in the substrate portion. At a position other than the specific position in the axial direction in the substrate portion, a pair of side surfaces along the axial direction of the opening are both end surfaces of the unselected one or more shift fork heads in the shift direction. By engaging, an interlock function is achieved that regulates movement of the unselected one or more shift fork heads in the shift direction.

  According to the above configuration, either or both of the shift direction both ends of the slit portion of the substrate portion of the interlock plate are coupled in the select direction. Therefore, compared to the above-described conventional type (type in which the substrate portion is completely divided in the select direction by the slit), the rigidity of the substrate portion of the interlock plate is high, and large deformation of the substrate portion hardly occurs. Therefore, compared to the conventional type described above, it is possible to reliably suppress the occurrence of double shift caused by the double selection state.

  In the S & S shaft assembly according to the present invention, it is preferable that both end portions of the slit portion in the shift direction are coupled in the axial direction (select direction). According to this, the rigidity of the substrate portion of the interlock plate can be further enhanced as compared with the case where only one of both end portions of the slit portion in the shift direction is connected in the select direction. As a result, it is possible to more reliably suppress the occurrence of double shift due to the double selection state.

It is the perspective view which showed the S & S shaft assembly which concerns on embodiment of this invention. It is the schematic diagram which showed the positional relationship of an inner lever, a shift fork head, and an interlock plate about the neutral state in the assembly completion state of the manual transmission with which the S & S shaft assembly shown in FIG. 1 was assembled | attached. It is a schematic diagram corresponding to FIG. 2 about a 3rd speed shift state. It is a schematic diagram corresponding to FIG. 2 about a 4th speed shift state. It is a schematic diagram corresponding to FIG. 2 about the 1st speed shift state. It is a schematic diagram corresponding to FIG. 2 about a 2nd speed shift state. FIG. 3 is a schematic diagram corresponding to FIG. 2 for a fifth speed shift state. It is a schematic diagram corresponding to FIG. 2 about a 6-speed shift state. It is a schematic diagram corresponding to FIG. 2 about a reverse shift state. It is a schematic diagram corresponding to FIG. 2 about a double selection state. It is a schematic diagram corresponding to FIG. 2 about the neutral state in the assembly completion state of the manual transmission in which the S & S shaft assembly according to the modified example of the embodiment of the present invention is assembled. It is the perspective view which showed the conventional S & S shaft assembly. It is a figure which shows the independent shape of the interlock plate shown in FIG. It is the figure which showed an example of the shift pattern of a shift lever. FIG. 13 is a schematic diagram showing a positional relationship among an inner lever, a shift fork head, and an interlock plate in a neutral state when the manual transmission with the S & S shaft assembly shown in FIG. 12 is assembled. It is a schematic diagram corresponding to FIG. 15 about a 3rd speed shift state. It is a schematic diagram corresponding to FIG. 15 about the 1st-speed shift state. It is a schematic diagram corresponding to FIG. 15 about a double selection state. It is a schematic diagram corresponding to FIG. 15 about the state which double shift generate | occur | produced by the deformation | transformation of the interlock plate.

  Hereinafter, an S & S shaft assembly according to an embodiment of the present invention and a manual transmission to which the S & S shaft assembly is assembled will be described with reference to the drawings.

(Constitution)
As shown in FIG. 1, an S & S shaft assembly A according to an embodiment of the present invention includes a fixing member 10 fixed to a case (a housing, not shown) of a manual transmission, an S & S shaft 20, and an interlock plate 30. And. In FIG. 1, a portion indicated by fine dots corresponds to the interlock plate 30 (the same applies to other drawings).

  This embodiment is applied to a vehicle in which the shift lever is operated in the pattern shown in FIG. 14 described above, that is, a vehicle having six shift stages for forward movement and one shift stage for backward movement. Also in this embodiment, various names for the pattern shown in FIG. 14 described in the background art section are applied.

  The fixing member 10 is fixed to a case of a manual transmission (not shown) using one of well-known fastening means such as bolts and nuts.

  The S & S shaft 20 is connected to a shift lever-side link mechanism via respective power transmission members (wires or the like) connected to the protrusions 11 and 12. The S & S shaft 20 is supported by the fixing member 10 so as to move in the axial direction with respect to the fixing member 10 by the driving force received from the power transmission member connected to the protrusion 11 in response to the selection operation of the shift lever. ing. Further, the S & S shaft 20 is fixed to the fixing member 10 so as to rotate about the axis with respect to the fixing member 10 by a driving force received from the power transmission member connected to the protrusion 12 in accordance with the shift operation of the shift lever. It is supported by. This support mode may be any mode as long as the S & S shaft 20 can move in the axial direction with respect to the fixed member 10 and can rotate around the axis.

  Inner levers 21 (two in this example) are fixed to the S & S shaft 20 so as to protrude radially outward. The direction in which the two inner levers 21 protrude from the S & S shaft 20 is the same. Each inner lever 21 may be fixed to the S & S shaft 20 by assembling the “member different from the S & S shaft main body” formed with the inner lever 21 to the S & S shaft main body, or cut out one member. For example, the S & S shaft 20 may be formed by processing.

  The interlock plate 30 moves in the axial direction with respect to the fixed member 10 as the S & S shaft 20 moves in the axial direction, and cannot rotate around the axis with respect to the fixed member 10. It is supported. This support mode may be any mode as long as the interlock plate 30 can move in the axial direction integrally with the S & S shaft 20 with respect to the fixed member 10 and cannot rotate around the axis. Hereinafter, the “axial direction” is referred to as the “select direction”, and the “direction perpendicular to the axial direction” is referred to as the “shift direction” (see FIG. 1).

  The interlock plate 30 includes a flat plate (rectangular) substrate portion 31 extending along the select direction. An opening (through hole) 31 a extending along the select direction is provided at the center of the substrate portion 31 in the shift direction. In this example, the opening 31a has a rectangular shape having long sides along the select direction.

  In addition, a slit portion 31b in which a pair of slits (a pair of notches penetrating through) S and S is formed is provided at a specific position (two locations in this example) in the select direction in the substrate portion 31. In each slit portion 31b, the pair of slits S, S correspond to corresponding ends in the shift direction of the substrate portion 31 from a pair of side surfaces (a pair of side surfaces corresponding to the long sides of the rectangle) along the select direction of the opening 31a. Each extends in the shift direction (outward) toward the part. Both end portions of each slit portion 31b in the shift direction are connected in the select direction.

  Each inner lever 21 can move in the shift direction (with rotation about the axis of the S & S shaft 20 with respect to the fixed member 10) in the internal space of the opening 31a at a specific position corresponding to the select direction in the substrate portion 31. Is arranged. The shape of the substrate part 31 may be produced by machining (such as dicing or wire cutting), or may be produced by pressing.

  As described above, according to the selection operation of the shift lever, each inner lever 21 and the interlock plate 30 are integrally moved in the selection direction with respect to the fixing member 10. On the other hand, according to the shift operation of the shift lever, each inner lever 21 moves in the shift direction with respect to the fixing member 10, while the interlock plate 30 does not move in the shift direction.

(Operation)
The S & S shaft assembly A described above is assembled and fixed to the case of the manual transmission. In the assembled state of the manual transmission, as schematically shown in FIG. 2, shift fork heads (hereinafter referred to as “heads”) 51 to 54 respectively fixed to the fork shafts 41 to 44 are arranged in the select direction. A plurality (four in this example) are arranged in parallel along the line. The heads 51 to 54 are a 5-speed to 6-speed shift head, a reverse shift head, a 3-speed to 4-speed shift head, and a 1-speed to 2-speed shift head, respectively. For each head (each fork shaft), the position shown in FIG. 2 is referred to as a “neutral position”. The state shown in FIG. 2 corresponds to the state in which the shift lever is in the neutral position.

  When all of the heads 51 to 54 are in the neutral position (the state shown in FIG. 2), the manual transmission is in the neutral state. When the head 51 (fork shaft 41) moves from the neutral position to the shift completion position in the left (right) direction in the drawing in the neutral state, the manual transmission enters the fifth speed (six speed) shift state. When the head 52 (fork shaft 42) moves from the neutral position to the shift completion position in the left direction in the drawing in the neutral state, the manual transmission enters the reverse shift state. When the head 53 (fork shaft 43) moves from the neutral position to the shift completion position in the left (right) direction in the drawing in the neutral state, the manual transmission enters the third speed (fourth speed) shift state. When the head 54 (fork shaft 44) is moved from the neutral position to the shift completion position in the left (right) direction in the drawing in the neutral state, the manual transmission is in the first speed (second speed) shift state.

  As each fork shaft moves, the corresponding sleeve for shifting gears moves via a shift fork (not shown). As a result, a power transmission path including a gear train of the corresponding gear is formed, and the corresponding gear is achieved. As such a configuration, one of well-known ones is used.

  Recesses are formed in the heads 51 to 54, respectively. The concave portion of each head engages with the inner lever 21 in the shift direction. Further, both end surfaces of each head in the shift direction engage with the interlock plate 30 (specifically, a pair of side surfaces along the select direction of the opening 31a) in the shift direction. Then, the head to be engaged with the inner lever 21 is selected by the selection operation of the shift lever. Hereinafter, “selection” for a certain head refers to a state in which the head is to be engaged with the inner lever 21.

  Specifically, when the shift lever is in the neutral position, the upper inner lever 21 in the drawing is engaged with one head 53 as shown in FIG. That is, one head 53 is selected by the upper inner lever 21. In this state, the manual transmission is in a neutral state. In this state, when the shift lever is operated to the third speed shift position, as shown in FIG. 3, the upper inner lever 21 pushes the concave portion of the head 53 in the shift direction (left direction in the figure), thereby 53 (therefore, the fork shaft 43) moves from the neutral position along the shift direction (left direction in the figure) to the shift completion position. As a result, the manual transmission enters the third speed shift state. Similarly, when the shift lever is operated from the neutral position to the 4-speed shift position, as shown in FIG. 4, the head 53 (and therefore the fork shaft 43) moves from the neutral position along the shift direction (right direction in the figure). Move to the shift completion position. As a result, the manual transmission is in the 4-speed shift state.

  When the shift lever is in the LOW select position, one head 54 is selected by the upper inner lever 21. That is, when the shift lever is operated to the first speed shift position through the LOW select position, as shown in FIG. 5, the selected one head 54 (and therefore the fork shaft 44) is shifted from the neutral position in the shift direction (in the figure). Move to the shift completion position along the left direction. As a result, the manual transmission is in the first speed shift state. Similarly, when the shift lever is operated to the 2nd speed shift position through the LOW select position, as shown in FIG. 6, the head 54 (and hence the fork shaft 44) moves from the neutral position to the shift direction (right direction in the figure). And move to the shift completion position. As a result, the manual transmission is in the 2-speed shift state.

  When the shift lever is in the HIGH select position, one head 51 is selected by the lower inner lever 21. That is, when the shift lever is operated to the 5th speed shift position through the HIGH select position, as shown in FIG. 7, one selected head 51 (and hence the fork shaft 41) is shifted from the neutral position in the shift direction (in the figure). Move to the shift completion position along the left direction. As a result, the manual transmission enters the fifth speed shift state. Similarly, when the shift lever is operated to the 6th speed shift position through the HIGH select position, as shown in FIG. 8, the head 51 (and hence the fork shaft 41) moves from the neutral position to the shift direction (right direction in the figure). And move to the shift completion position. As a result, the manual transmission is in a 6-speed shift state.

  When the shift lever is in the reverse select position, one head 52 is selected by the lower inner lever 21. That is, when the shift lever is operated to the reverse shift position through the reverse select position, as shown in FIG. 9, one selected head 52 (and therefore the fork shaft 42) moves from the neutral position to the shift direction (left in the figure). Direction) to the shift completion position. As a result, the manual transmission is in the reverse shift state.

  On the other hand, as shown in FIGS. 2 to 9, both end surfaces of the remaining unselected heads in the shift direction are respectively interlocked plates 30 (specifically, a pair along the select direction of the opening 31a) in the shift direction. The side). Here, the interlock plate 30 does not move in the shift direction. Therefore, even if an external force in the shift direction is applied to the unselected head for some reason, movement of the unselected head in the shift direction is restricted (prohibited). Thus, the interlock plate 30 (a pair of side surfaces along the select direction of the opening 31a) achieves a function (that is, an interlock function) for fixing the unselected head at the neutral position.

  Thus, when the shift lever is normally operated along the pattern shown in FIG. 14, one head is selected, and the remaining heads are on the interlock plate 30 (a pair of side surfaces along the selection direction of the opening 31a). It is fixed at the neutral position by the interlock function. On the other hand, actually, the shift lever may be abnormally operated in a pattern shifted from the pattern shown in FIG. In such a case, two heads can be selected simultaneously. Hereinafter, this state is referred to as a “double selection state”.

  Hereinafter, the case where the shift lever is pressed from the position between the neutral position and the LOW select position toward the third speed shift position (or the first speed shift position) will be considered with reference to FIG.

  In the example shown in FIG. 10, the two heads 53 and 54 are selected for the lower inner lever 21, and the double selection state occurs. In this example, the heads 53 and 54 are both engaged with the interlock plate 30 (a pair of side surfaces along the selection direction of the opening 31a). Therefore, even if the heads 53 and 54 are pushed in the shift direction (left direction in the figure) by the lower inner lever 21, the movement of the heads 53 and 54 in the shift direction is restricted, so that the inner lever 21 and the head The movement of 53 and 54 in the shift direction is restricted.

  Thus, according to the interlock function of the interlock plate 30 (a pair of side surfaces along the select direction of the opening 31a), the phenomenon in which the two heads simultaneously move to the shift completion position due to the double selection state (that is, , The occurrence of the “double shift” described above is suppressed.

(Action / Effect)
Hereinafter, the operation and effect of the S & S shaft assembly A according to the embodiment of the present invention will be described. As described above, in the slit portion 31b provided in the substrate portion 31 of the interlock plate 30, both the shift direction both ends of the slit portion 31b are connected in the select direction. Therefore, the rigidity of the substrate portion 31 of the interlock plate 30 is higher than that of the conventional type described in the background art section (a type in which the substrate portion is completely divided in the select direction by the slit). In other words, the substrate part 31 is unlikely to be greatly deformed.

  Therefore, in the double selection state shown in FIG. 10, even if the shift lever is pressed toward the third speed shift position (or the first speed shift position) with a relatively strong force, the “side surface of the opening 31a and It is difficult for a phenomenon in which a portion close to “the portion where the heads 53 and 54 are engaged” to be greatly deformed. As a result, the interlock function described above can be maintained normally. That is, compared to the conventional type described above, it is possible to reliably suppress the occurrence of double shift caused by the double selection state.

  The present invention is not limited to the above embodiment, and various modifications can be employed within the scope of the present invention. For example, in the above embodiment, both ends in the shift direction in the slit portion 31b are connected in the select direction, but as shown in FIG. 11, only one of both ends in the shift direction in the slit portion 31b is in the select direction. It may be connected to. This also makes it possible to increase the rigidity of the substrate portion 31 of the interlock plate 30 as compared with the conventional type described in the background art section.

  In the above embodiment, the two inner levers 21 are formed in the S & S shaft 20, but one or three or more inner levers 21 may be formed in the S & S shaft 20. Further, in the above embodiment, there are four heads as objects to be engaged with the inner lever 21 or the interlock plate 30 (side surface of the opening 31a), but there are two, three, or five or more heads. May be present. Further, the arrangement order and positional relationship of the four heads in the select direction may be different.

  DESCRIPTION OF SYMBOLS 10 ... Fixed member, 20 ... S & S shaft, 21 ... Inner lever, 30 ... Interlock plate, 31 ... Substrate part, 31a ... Opening, 31b ... Slit part, 41-44 ... Fork shaft, 51-54 ... Shift fork head, S ... Slit

Claims (2)

A fixing member fixed to the case of the transmission;
A shift-and-select shaft arranged to move in the axial direction with respect to the fixed member in response to a select operation and to rotate around the axis with respect to the fixed member in response to a shift operation. A shift and select shaft with a fixed inner lever protruding into the
An interlock plate that moves in the axial direction with respect to the fixed member along with the axial movement of the shift-and-select shaft and is disposed so as not to rotate about the axis with respect to the fixed member;
A shift and select shaft assembly of a transmission with
In response to the selection operation, one shift fork head in which a recessed portion of the head engages with the inner lever is selected from a plurality of shift fork heads arranged in parallel along the axial direction, and according to the shift operation. When the inner lever pushes the concave portion of the selected one shift fork head in the shift direction perpendicular to the axial direction, the shift fork head moves along the shift direction, and the corresponding shift stage is achieved. Configured to
The interlock plate includes a flat substrate portion extending along the axial direction,
An opening extending along the axial direction is provided in a central portion of the substrate portion in the shift direction,
The specific position in the axial direction of the substrate portion includes a pair of extending in the shift direction from each of the pair of side surfaces along the axial direction of the opening toward the corresponding end portion in the shift direction of the substrate portion. A slit part formed with a slit, wherein either one or both of both end parts in the shift direction of the slit part are connected in the axial direction;
The inner lever is arranged to be movable in the shift direction in the internal space of the opening at the specific position in the axial direction of the substrate portion,
At a position other than the specific position in the axial direction in the substrate portion, a pair of side surfaces along the axial direction of the opening are both end surfaces in the shift direction of the one or more shift fork heads that are not selected. A shift and select shaft assembly of a transmission that, by engaging, achieves an interlock function that regulates movement of the unselected one or more shift fork heads in the shift direction. In the shift and select shaft assembly of the transmission according to claim 1,
A shift and select shaft assembly of a transmission, wherein both ends of the slit portion in the shift direction are connected in the axial direction.

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