JP2010169126A - Manual transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manual transmission having a good feeling during shift operation. <P>SOLUTION: The manual transmission includes a select outer lever 110 to be turned while receiving a load from a select cable during select actuation, a select outer shaft 120 formed integrally with the select outer lever 110, a select inner lever 130 fixed to the select outer shaft 120, an interlock plate 140 for engaging with the select inner lever 130, and a select detent mechanism 190 having a part for engaging with the select inner lever 130. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a manual transmission, and more particularly to a manual transmission having a select detent mechanism.

  Examples of conventional manual transmissions include those described in Patent Documents 1 to 4 below. For example, Patent Documents 1 to 3 show a manual transmission in which a select detent mechanism is provided on a shift select shaft.

JP 2008-32167 A JP 2004-353737 A Japanese Patent Laid-Open No. 10-288258 JP 2006-308018 A

  In the above-described manual transmission, play in the axial direction of the select outer shaft cannot be sufficiently suppressed. Further, in the above-described manual transmission, the load transmission characteristic from the select detent mechanism to the select outer lever cannot be sufficiently improved. As a result, the operator's feeling at the time of shifting operation cannot be improved sufficiently.

  An object of the present invention is to provide a manual transmission having a good feeling during a shifting operation.

  A manual transmission according to the present invention includes a select outer lever that rotates in response to a load from a select cable during a select operation, a select outer shaft that is formed integrally with the select outer lever, and a select that is fixed to the select outer shaft. An inner lever, an interlock plate that engages with the select inner lever, and a select detent mechanism having a portion that engages with the select inner lever.

  ADVANTAGE OF THE INVENTION According to this invention, the manual transmission with the favorable feeling at the time of gear shifting operation can be provided.

It is a figure which shows the structure of the manual transmission which concerns on one embodiment of this invention. It is II-II sectional drawing in FIG. It is sectional drawing which looked at each forward stage engagement part and its peripheral part in the select / shift mechanism from the axial direction of the shift select shaft. It is a figure which shows the relationship between the movement of the axial direction of a select outer shaft, and rotation of a select inner lever. It is a figure for demonstrating the structure of a selection detent mechanism.

  Embodiments of the present invention will be described below. Note that the same or corresponding portions are denoted by the same reference numerals, and the description thereof may not be repeated.

  Note that in the embodiments described below, when referring to the number, amount, and the like, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the following embodiments, each component is not necessarily essential for the present invention unless otherwise specified.

  FIG. 1 is a diagram illustrating a configuration of a manual transmission according to the present embodiment. Referring to FIG. 1, a manual transmission according to the present embodiment includes a select outer lever 110, a select outer shaft 120, a select inner lever 130, an interlock plate 140, a shift select shaft 150, and a shift inner. A lever 160, a head 170, a fork shaft 180, and a select detent mechanism 190 are included.

  The select outer lever 110 and the select outer shaft 120 are integrally formed. The select outer lever shaft 120 and the select inner lever 130 are fixed by bolts. The interlock plate 140 is engaged with the select inner lever 130. As the select inner lever 130 rotates, the interlock plate 140 also rotates. Along with the interlock plate 140, the shift select shaft 150 also rotates in the direction of the arrow DR2. Thereby, the selection operation (select operation) of the 1st-2nd speed, the 3rd-4th speed, or the 5th-6th gear stage is performed.

  The shift inner lever 160 moves in the direction of the arrow DR1 together with the shift select shaft 150. As shift inner lever 160 moves in the direction of arrow DR1, head 170 and fork shaft 180 also move in the direction of arrow DR1. The head 170 and the fork shaft 180 are fixed to each other by pins. Thereby, for example, a shift operation for selecting which of the first to second gears is performed.

  The distal end portion of the select detent mechanism 190 is fitted in a groove portion 130 </ b> A formed on the axial end surface of the select inner lever 130. Thereby, the movement of the select outer shaft 120 in the axial direction (arrow DR0 direction) is suppressed.

  2 is a cross-sectional view taken along the line II-II in FIG. Referring to FIG. 2, interlock plate 140 has an engagement hole 141A, and select inner lever 130 is engaged with engagement hole 141A. The select inner lever 130 rotates in the direction of the arrow DR3. As a result, the interlock plate 140 rotates to perform the select operation.

  FIG. 3 is a cross-sectional view of each forward-stage engaging portion and its peripheral portion in this select / shift mechanism as viewed from the axial direction of the shift select shaft. As shown in FIG. 3, the shift select shaft 150 that receives the operating force of the shift lever and slides in the axial direction and rotates in the direction around the axis is housed in the transmission case C. The shift select shaft 150 is supported by the transmission case C so as to be rotatable and reciprocally movable in the axial direction.

  A shift inner lever 160 for selecting one of the fork shafts 181, 182 and 183 (corresponding to the fork shaft 180 in FIG. 1) is fixed to the shift select shaft 150. The shift inner lever 160 has a cylindrical portion (base portion) 160A that is externally fitted and fixed to the outer periphery of the shift select shaft 150, and an arm portion 160B that is connected to the cylindrical portion 160A. The cylindrical portion 160A is formed with a hole that can receive the shift select shaft 150. The arm portion 160B extends along the radial direction of the shift select shaft 150, and is fixed to the shift select shaft 150 with a cylindrical portion 160A interposed therebetween.

  An interlock plate 140 is externally fitted to the cylindrical portion 160A of the shift inner lever 160 so as to be relatively movable in the axial direction with respect to the shift inner lever 160 and not to be rotatable around the axis. The interlock plate 140 includes a cylindrical portion 140B in which a through hole 140A for receiving the cylindrical portion 160A of the shift inner lever 160 is formed, and a guide portion 140D that defines the moving direction of the shift inner lever 160 around the axis of the shift select shaft 150. 140E. The guide portions 140D and 140E are located on both sides of the arm portion 160B.

  In the interlock plate 140, engagement piece passages 140 </ b> C made of a pair of opposing guide surfaces that are in sliding contact with both sides of the arm portion 160 </ b> B around the axis of the shift select shaft 150 extend in the radial direction of the shift select shaft 150. Is formed. The arm portion 160B is slidable in the axial direction of the shift select shaft 150 through an engagement piece passage 140C that is a gap defined by the guide portions 140D and 140E.

  The arm portion 160B can be engaged with heads 171, 172, and 173 (corresponding to the head 170 in FIG. 1). Each pair of heads (advancing step engagement pieces) 171, 172, and 173 is disposed on both sides of the shift select shaft 150 in the axial direction across the rotation path of the arm portion 160 </ b> B of the shift inner lever 160. . That is, each of the pair of heads 171, 172, 173 sandwiches the interlock plate 140 or the arm portion 160B from the front side and the back side of the sheet of FIG. Each head 171, 172, 173 is disposed at a position where the arm portion 160B can be selectively engaged according to the rotation of the interlock plate 140 around the axis. The selected heads 171, 172, and 173 are engaged with the arm portion 160 </ b> B and moved in the axial direction of the shift select shaft 150.

  The interlock plate 140 is relatively movable in the axial direction with respect to the cylindrical portion 160A of the shift inner lever 160, but is not movable in the axial direction with respect to the transmission case C. The shift inner lever 160 is fixed to the shift select shaft 150 integrally and rotationally by an engagement pin P inserted from the shift select shaft 150 to the cylindrical portion 160A. The shift inner lever 160 is displaced together with the shift select shaft 150 in the axial direction and around the axis of the shift select shaft 150.

  The engagement hole 141 </ b> A formed in the engagement portion 141 in the interlock plate 140 can receive the tip portion of the select inner lever 130. The select inner lever 120 is rotatably provided by receiving an operation force in the select direction from a shift lever (not shown). The tip of the select inner lever 130 extending in the direction perpendicular to the paper surface in FIG. 3 engages with the interlock plate 140.

  The fork shafts 181, 182, and 183 are arranged away from the shift select shaft 150 and in parallel with the shift select shaft 150. The fork shafts 181, 182 and 183 are supported by the transmission case C so as to be displaceable in the axial direction. Each fork shaft 181, 182, 183 is provided with a forward-stage engaging portion having heads 171, 172, 173.

  That is, the first-speed / second-speed fork shaft 181 is provided with a first-speed / second-speed forward-stage engaging portion having a head 171. The third-speed / four-speed fork shaft 182 is provided with a forward-speed engaging portion for the third-speed / four-speed having a head 172. The fifth-speed to sixth-speed fork shaft 183 is provided with a fifth-speed to sixth-speed forward gear engaging portion having a head 173. Further, the engagement pins P are inserted from the respective fork shafts 181, 182, 183 to the respective forward-stage engagement portions. Each forward-stage engaging portion is integrally connected to each fork shaft 181, 182, 183 so as to be slidable in the axial direction of each fork shaft 181, 182, 183.

  In this select / shift mechanism, a shift lever (not shown) can transmit the operating force applied to the shift lever to the shift select shaft 150 via the select cable and the shift cable. The select cable is connected to the select outer lever 110. The selection operation force of the shift lever is received by the select outer lever 110 via the selection cable, and gives a turning force around the axis to the shift selection shaft 150.

  The shift select shaft 150, to which the operating force is transmitted from the shift lever (not shown) during the shift operation to the forward gear, rotates around the axis (in the direction of the arrow DR2) according to the select operation of the shift lever. And is placed at a rotation position corresponding to the operation position of the shift lever. Further, the shift select shaft 150 performs a shift operation that reciprocates by sliding in the axial direction (perpendicular to the paper surface in FIG. 3) according to the shift operation of the shift lever, and the slide position according to the operation position of the shift lever. Placed in.

  That is, the select operation force for the shift lever is transmitted to the select inner lever 130 as a turning force around the axis through the select cable. As the select inner lever 130 rotates, the interlock plate 140 rotates about the axis of the shift select shaft 150. As the interlock plate 140 rotates, the shift inner lever 160 is pressed by the guide portions 140D and 140E of the interlock plate 140 and rotates around the axis of the shift select shaft 150. As the shift inner lever 160 rotates, the arm portion 160B can selectively engage with any of the heads 171, 172, and 173 disposed adjacently along both sides of the rotation path of the arm portion 160B. Positioned. In this way, the selection operation is performed.

  The shift operation force with respect to the shift lever is transmitted to the shift select shaft 150 as a slide movement force in the axial direction via the shift cable. As the shift select shaft 150 is displaced in the axial direction, any of the heads 171, 172, 173 and the arm portion 160B are selectively engaged, and the selected forward-stage engaging portion and the fork shaft 181 Either 182 or 183 is displaced in the axial direction. In this way, the shift operation is performed.

  In FIG. 3, the rotation positions of the shift select shaft 150 and the shift inner lever 160 when the shift lever is operated to the 3rd-4th select position P2 and the arm portion 160B is engaged with the head 172 are illustrated. ing.

  FIG. 4 is a diagram showing the relationship between the axial movement of the select outer shaft and the rotation of the select inner lever. Referring to FIG. 4, as the select outer lever 120 shown in FIG. 1 moves in the axial direction (arrow DR0 direction), the select inner lever 130 also moves in the same direction. Here, the select inner lever 130 moves along the wall surface of the engagement hole 141A (“A” in FIG. 4). Since the wall surface of the engagement hole 141A extends in an oblique direction intersecting the axial direction of the select outer lever 120, the select inner lever 130 rotates in the select direction along with the movement in the axial direction. It is moved (“B” in FIG. 4). As a result, there is a tendency that play during the select operation tends to increase.

  On the other hand, in the manual transmission according to the present embodiment, a portion of the select detent mechanism 190 is fitted into the groove portion 130A provided on the axial end surface of the select inner lever 130, whereby the shaft of the select outer shaft 120 is fitted. Directional movement can be suppressed. As a result, it is possible to suppress the occurrence of backlash during the select operation. That is, since the movement of the select outer shaft 120 in the axial direction can be restricted only by the tolerance between the groove on the select inner lever 130 and the select detent mechanism 190, the amount of movement can be reduced. As a result, play at the time of shifting operation is reduced, and the operator's feeling is improved. In addition, since the number of parts from the select detent mechanism 190 to the select outer lever 110 can be minimized, the load transmission efficiency from the select detent mechanism 190 to the select outer lever 110 is improved. And the feeling at the time of shifting operation further improves.

  FIG. 5 is a diagram for explaining the structure of the select detent mechanism. Referring to FIG. 5, select tentent mechanism 190 includes a ball 191 and a spring 192 that biases ball 191 toward select inner lever 130. The ball 191 urged by the spring 192 is fitted into a recess provided in the select inner lever 130. As a result, unless the ball 191 is completely removed from the recess, a restoring force is applied to return the select inner lever 130 to the select position (neutral position). In addition, when the shift lever is selected, a sense (moderate feeling) that allows the driver to feel that the lever has been pulled in and the selection operation has been performed can be obtained.

  The contents described above are summarized as follows. That is, the manual transmission according to the present embodiment includes a select outer lever 110 that rotates in response to a load from the select cable during a select operation, a select outer shaft 120 that is formed integrally with the select outer lever 110, and a select A select inner lever 130 fixed to the outer shaft 120, an interlock plate 140 that engages with the select inner lever 130, and a select detent mechanism 190 having a portion that engages with the select inner lever 130 are provided.

  Although the embodiments of the present invention have been described above, the embodiments disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  110 Select Outer Lever, 120 Select Outer Shaft, 130 Select Inner Lever, 130A Groove, 140 Interlock Plate, 140A Through Hole, 140B Tube, 140C Engagement Passage, 140D, 140E Guide, 141 Engagement, 141A Engagement Joint hole, 150 shift select shaft, 160 shift inner lever, 160A cylinder portion, 160B arm portion, 170, 171, 172, 173 head, 180, 181, 182, 183 fork shaft, 190 select detent mechanism, 191 ball, 192 spring .

Claims (1)

A select outer lever that rotates under the load from the select cable during the select operation;
A select outer shaft formed integrally with the select outer lever;
A select inner lever fixed to the select outer shaft;
An interlock plate engaged with the select inner lever;
A manual transmission comprising a select detent mechanism having a portion engaged with the select inner lever.

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