JP2010190253A - Operation force transmitting mechanism for manual transmission - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To inhibit force inclining a rotation lever with respect to a rotation shaft from being transferred to a pin in an operation force transmitting mechanism for a manual transmission having a structure in which a base end part of the rotation lever is fitted on an outer circumference part of the rotation shaft in such a manner that the same can not relatively rotate, and the pin is inserted through the base end part of the rotation lever and the rotation shaft. <P>SOLUTION: This mechanism includes the rotation shaft 2, an annular base end part 3a, and an arm part 3b extending in a radial direction from the base end part 3a, and is provided with the rotation lever 3 having the base end part 3a fitted on an outer circumference part of the rotation shaft 2 by spline fitting, and the pin 4 inserted through the base end part 3a of the rotation lever 3 and the rotation shaft 2. A through-hole 3d of the pin 4 at the base end part 3a of the rotation lever 3 is formed in an oblong hole shape having a longitudinal direction in an axis 2a direction of the rotation shaft 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an operating force transmission mechanism for a manual transmission mounted on a vehicle.

  In a manual transmission mounted on a vehicle, an operating force of a speed change operation unit (for example, a shift lever) handled when a driver performs a speed change operation is transmitted to a synchromesh mechanism, each gear element, and the like by an operation force transmission mechanism. The

  As shown in FIGS. 12 and 13, the operating force transmission mechanism includes an annular base end 202 a and a radial direction from the base end 202 a on the outer periphery of the rotating shaft 201 that rotates about the axis 201 a. A base end portion 202a of a rotating lever 202 having an extended arm portion 202b is spline-fitted, and further, a spring pin 203 (in the radial direction across the base end portion 202a of the rotating lever 202 and the rotating shaft 201). Some have a structure through which a slotted pin is penetrated (for example, see Patent Documents 1 to 5).

  In the above structure, the rotation shaft 201 and the rotation lever 202 are rotated around the axis 201a by the operation force from the speed change operation unit (not shown), and the interlocking member engaged with the arm portion 202b of the rotation lever 202 is the arm portion. It operates in conjunction with the rotation of 202b. The interlocking member is, for example, a reciprocating shaft 204 provided so as to be reciprocally movable in the longitudinal direction as shown in FIGS. 12 and 13, and is rotated in a notch portion 204 a provided in a part of the reciprocating shaft 204. The arm portion 202b of the moving lever 202 is engaged. In this case, the reciprocating shaft 204 moves in the longitudinal direction in conjunction with the rotation of the arm portion 202b.

JP 2006-177490 A Japanese Patent Publication No. 1-331058 JP 2007-10027 A Japanese Patent Publication No. 2-10307 Japanese Patent Application Laid-Open No. 2000-230566

  By the way, regarding the position of the rotation shaft 201 in the axis line 201a direction, as shown in FIG. 12, the center position of the base end portion 202a of the rotation lever 202 and the load center position P of the arm portion 202b of the rotation lever 202 are as follows. There is a case where they do not match (that is, there is a case where the center position of the base end portion 202a and the load center position P of the arm portion 202b are shifted from each other by the dimension Z). Further, the spline large-diameter portion D (see FIG. 13) between the outer peripheral portion of the rotating shaft 201 and the inner peripheral portion of the base end portion 202a of the rotating lever 202 is usually provided with some play in the radial direction. It is done.

  Therefore, in the above case, the turning lever 202 tends to tilt with respect to the turning shaft 201 by the reaction force received from the reciprocating shaft 204 or the like during turning.

  A force for tilting the rotating lever 202 (hereinafter also referred to as “tilting power”) is a spring pin that penetrates the proximal end portion 202a of the rotating lever 202 and the rotating shaft 201 in the radial direction. 203 acts as a shearing force, and may act as a force for pulling out the spring 203 depending on the situation. If the shearing force is repeatedly applied to the spring pin 203, the spring pin 203 is gradually fatigued and the durability may be reduced.

  The present invention has been made in view of the above-described problems. The base end portion of the rotating lever is fitted to the outer peripheral portion of the rotating shaft that rotates about the axis so that the rotating lever cannot be relatively rotated. In an operating force transmission mechanism of a manual transmission having a structure in which a pin is passed through a base end portion of a moving lever and a rotating shaft, a force for tilting the rotating lever with respect to the rotating shaft is transmitted to the pin. An object of the present invention is to provide an operating force transmission mechanism for a manual transmission that can suppress this.

  As means for solving the above-described problems, the operating force transmission mechanism of the manual transmission of the present invention is configured as follows.

  That is, the operating force transmission mechanism of the manual transmission of the present invention includes a rotating shaft that rotates about an axis, an annular base end portion, and an arm portion that extends in a radial direction from the base end portion, A rotation lever having a base end portion fitted to the outer peripheral portion of the rotation shaft so as not to be relatively rotatable, and a pin passed through the base end portion of the rotation lever and the rotation shaft. Yes. And the pin passage hole in the base end part of the said rotation lever is formed in the long hole shape which made the axial direction of the said rotation shaft the longitudinal direction.

  When the rotation lever is fitted to the rotation shaft so as not to rotate relative to the rotation shaft, the rotation lever easily tilts in the axial direction of the rotation shaft. Therefore, it is difficult to transmit a force for tilting the rotating shaft to the pin inserted in the long hole-shaped hole whose longitudinal direction is the axial direction of the rotating shaft.

  In addition, the operating force transmission mechanism of the manual transmission according to the present invention includes an interlocking member provided to be engageable with the arm portion so as to be interlocked with the rotation of the arm portion of the rotation lever in the above configuration. And the center position of the base end portion of the rotating lever and the load center position of the arm portion of the rotating lever may not match with respect to the axial position of the rotating shaft. .

  Similarly, in the operating force transmission mechanism of the manual transmission having such a configuration, the rotation lever fitted to the rotation shaft so as not to be relatively rotatable is tilted with respect to the rotation shaft by the reaction force from the interlocking member. In this case, since it is easy to tilt in the axial direction of the rotating shaft, the pin inserted in the long hole-shaped through hole whose longitudinal direction is the axial direction of the rotating shaft is a force that tilts the rotating shaft. Is difficult to communicate.

  In the manual transmission operating force transmission mechanism according to the present invention, in any of the configurations described above, a male spline groove extending in an axial direction of the rotating shaft is formed on an outer peripheral portion of the rotating shaft. And a female spline groove extending in the axial direction of the rotating shaft and corresponding to the male spline groove is formed in the inner peripheral portion of the base end portion of the rotating lever. The outer peripheral portion and the base end portion of the rotating lever may be fitted so that relative rotation is impossible by fitting the male spline groove and the female spline groove.

  In the manual transmission operating force transmission mechanism according to the present invention, in any of the above-described configurations, the rotating shaft may be provided so as to be rotated by a shift operating force.

  According to the operating force transmission mechanism of the manual transmission of the present invention, the pin passage hole at the base end portion of the rotation lever is formed in a long hole shape with the axial direction of the rotation shaft as the longitudinal direction. The force for tilting the moving lever with respect to the rotating shaft is not easily transmitted to the pin. Thereby, durability of a pin improves.

It is a front view of the operating force transmission mechanism of the manual transmission which concerns on embodiment of this invention. It is A arrow directional view of FIG. However, the reciprocating shaft has a cross section at the notch. It is a bottom view of the operating force transmission mechanism of the manual transmission according to the embodiment of the present invention. It is a top view of the operating force transmission mechanism of the manual transmission which concerns on embodiment of this invention. It is BB sectional drawing of FIG. It is C arrow line view of FIG. It is a figure which shows the outline of the shift gate shape of a known 6 speed manual mission. It is EE sectional drawing of FIG. 6, Comprising: It is sectional drawing cut | disconnected by the plane which passes a spline large diameter part and an axis line. It is a perspective view of the operating force transmission mechanism of the manual transmission according to the embodiment of the present invention. It is a perspective view of the operating force transmission mechanism of the manual transmission according to the embodiment of the present invention. It is a perspective view of the operating force transmission mechanism of the manual transmission according to the embodiment of the present invention. It is a front view of the operating force transmission mechanism of the conventional manual transmission. The reciprocating shaft has a cross section at the notch. It is a bottom view of the operating force transmission mechanism of the conventional manual transmission.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIGS. 1-6 is a figure which shows the characteristic part of the operating force transmission mechanism 1 (henceforth "the operating force transmission mechanism 1" only) of the manual transmission which concerns on embodiment of this invention. 1 is a front view, FIG. 2 is a view from the direction of arrow A in FIG. 1, FIG. 3 is a bottom view, FIG. 4 is a plan view, FIG. 5 is a cross-sectional view along BB in FIG. It is an arrow view.

  The operation force transmission mechanism 1 transmits an operation force of a speed change operation unit that is handled when the driver performs a speed change operation. The shift operation unit is, for example, a shift lever, and the operation force is a shift operation force or a select operation force. The shift operation force and the select operation force will be described by taking a shift lever L arranged at a shift gate of a known 6-speed manual mission as shown in FIG. 7 as an example. The operation force is a select operation force. The shift operation is an operation for moving the shift lever L in the direction indicated by the arrow Y, and the operation force is the shift operation force.

  As shown in FIGS. 1 to 6, the operating force transmission mechanism 1 includes a rotating shaft 2, a rotating lever 3, a pin 4, a reciprocating shaft 5, and the like.

  The rotating shaft 2 is supported by a transmission case (not shown) so as to be rotatable around an axis 2a. The rotating shaft 2 receives an operating force from the speed change operation unit via a cable or the like, and is rotated in the forward and reverse directions around the axis 2a according to the direction of the operating force.

  The rotating lever 3 includes an annular base end portion 3a and an arm portion 3b extending in a radial direction from the base end portion 3a. The base end portion 3 a is fitted to the outer peripheral portion of the rotation shaft 2 so as not to be relatively rotatable. Various fitting structures can be adopted, but in this embodiment, spline fitting is adopted. That is, a female spline groove 3c is formed on the inner peripheral portion of the base end portion 3a of the rotating lever 3, and a male spline groove 2b corresponding to the female spline groove 3c is formed on the outer peripheral portion of the rotating shaft 2. . In this spline fitting, a slight play (hereinafter also referred to as “large diameter part play”) is provided in the radial direction between the rotating shaft 2 and the base end part 3a in the spline large diameter part D (see FIG. 3). It has been. The spline grooves 3c and 2b extend in the direction of the axis 2a.

  The pin 4 passes through the base end 3 a of the rotation lever 3 and the rotation shaft 2 in the radial direction, and is press-fitted into the rotation shaft 2. The pin 4 plays a role of positioning the rotating lever 3 in the direction of the axis 2a with respect to the rotating shaft 2 (in the present embodiment, positioning is performed within the range of a long hole described later).

  Further, when a spring pin (for example, a spring pin having a substantially C-shaped cross section) that is elastically deformed and can be expanded and contracted is employed as the pin 4, the pin 4 includes the base end portion 3 a of the rotation lever 3 and the rotation shaft. It also plays a role of absorbing shakiness around the axis 2a of the fitting portion with the outer peripheral portion of 2.

  The through hole 3 d of the pin 4 in the base end portion 3 a of the rotation lever 3 is formed in a long hole shape with the direction of the axis 2 a of the rotation shaft 2 as the longitudinal direction. In this way, the hole width L in the longitudinal direction of the hole 3d desirably satisfies the relationship of the following formulas 1 and 2 or formulas 1 and 3 when dimensions are given as shown in FIG.

L> W (Formula 1)
If X ≦ Y, L ≧ W + Xtanθ (Formula 2)
If X> Y, L ≧ W + Ytan θ (Formula 3)
Here, W is the minimum hole width of the through-hole 2d, X is the radial width of the proximal end portion 3a of the rotating lever 3 (the vicinity of the pin 4), Y is the length of the pin 4, and θ is the large-diameter portion play. Represents the maximum inclination angle with respect to the axis 2a of the rotating lever 3 generated by the above. The minimum hole width W of the through hole 2d is equal to the diameter of the pin 4.

  The reciprocating shaft 5 (interlocking member) is, for example, supported by a transmission case (not shown) so as to be movable in the longitudinal direction, and an arm of the rotating lever 3 is provided in a notch portion 5a provided in an intermediate portion thereof. The part 3b is engaged. As a result, the reciprocating shaft 5 moves in the longitudinal direction in conjunction with the rotation of the arm portion 3 b of the rotation lever 3.

  In the operating force transmission mechanism 1 described above, as shown in FIG. 2, with respect to the position of the rotation shaft 2 in the direction of the axis 2 a, the center position of the base end portion 2 a of the rotation lever 2 and the rotation lever 2. The load center position P of the arm portion 2b does not match. That is, they are shifted from each other by the dimension Z in the direction of the axis 2a. Further, as described above, there is a large-diameter portion play in the spline large-diameter portion D.

  Therefore, when the rotating lever 3 rotates, a force (hereinafter referred to as “tilting power”) that causes the rotating lever 3 to tilt with respect to the rotating shaft 2 due to a reaction force received from the reciprocating shaft 5. Say.) Works.

  However, when the rotation lever 3 that is spline-fitted to the rotation shaft 2 tilts with respect to the rotation shaft 2, the rotation lever 3 easily tilts in the direction of the axis 2 a of the rotation shaft 2. For this reason, it is difficult for the tilting power to be transmitted to the pin 4 inserted through the long hole 3d with the axis 2a direction of the rotating shaft 2 as the longitudinal direction. Thereby, fatigue and damage of the pin 4 are prevented, and a decrease in durability can also be suppressed. Further, it is possible to prevent the pin 4 from being detached from the rotating shaft 2.

  Next, a description will be given of a case where the operation force transmission mechanism is applied to a synchronous mesh type manual transmission with six forward speeds and one reverse speed.

  9 to 11 are perspective views of the operating force transmission mechanism 100 including the previously described rotating shaft 2, rotating lever 3, pin 4, reciprocating shaft 5, and the like. In the following description, the same components as those described above are denoted by the same reference numerals and description thereof is omitted.

  The operation force transmission mechanism 100 transmits a shift operation force of a shift operation unit (not shown) to a synchromesh mechanism (not shown), and transmits a select operation force of the shift operation unit to a second shift inner lever 112 described later. .

  Reference numeral 101 denotes a shift outer lever 101. The shift outer lever 101 is fixed to one end of a rotation shaft 2 (shift rotation shaft) supported by a transmission case (not shown) so as to be rotatable around an axis 2a. Further, the shift outer lever 101 receives a shift operation force of the speed change operation part via a cable (not shown) connected to the joint part 101a at the intermediate position, and rotates the rotation shaft 2 about the axis 2a. A shift mass 106 that assists the driver's shift operation force is provided at the tip of the shift outer lever 101.

  As described above, the base end portion 3a of the rotation lever 3 (first shift inner lever) is spline-fitted to the outer peripheral portion of the rotation shaft 2. Further, as shown in FIG. 11, a pin 4 (spring pin) is passed through the base end portion 3 a of the rotation lever 3 and the rotation shaft 2.

  The arm portion 3 b of the rotating lever 3 is engaged with a notch portion 5 a of the reciprocating shaft 5 (shift select shaft) in the longitudinal direction of the shaft 5. The reciprocating shaft 5 is supported by a transmission case (not shown) so as to be rotatable about its axis and slidable in the axial direction.

  On the other hand, the select operation force of the speed change operation unit is transmitted via a cable (not shown) connected to the joint unit 108a provided on the select outer lever 108. The select outer lever 108 is fixed to one end of a select rotation shaft 109 supported on the transmission case so as to be rotatable about an axis. The select outer lever 108 receives the select operation force of the speed change operation unit via the cable and rotates the select rotation shaft 109 about its axis.

  An annular base end 111 a of the select inner lever 111 is spline-fitted to the outer periphery of the select rotation shaft 109, and a spring pin (not shown) is passed through the base end 111 a and the select rotation shaft 109. ing. Further, an arm portion 111b extending in a radial direction from the base end portion 111a of the select inner lever 111 is engaged with an engaging portion 113a of an interlock member 113 described later in the rotational direction of the reciprocating shaft 5. It has become.

  An annular base end 112a of the second shift inner lever 112 is spline-fitted to the outer periphery of the reciprocating shaft 5 and a spring pin (not shown) is passed through the base end 112a and the reciprocating shaft 5. . Further, an arm portion 112b extends radially outward from the base end portion 112a of the second shift inner lever 112.

  An interlock member 113 having a substantially C-shaped cross section is fitted on the base end portion 112 a of the second shift inner lever 112. The interlock member 113 is relatively movable in the axial direction with respect to the proximal end portion 112a of the second shift inner lever 112 and is not relatively rotatable around the axial line.

  Further, the interlock member 113 has an engagement piece passage 113b that is in sliding contact with both sides of the rotation of the arm portion 112b of the second shift inner lever 112. The engagement piece passage 113a passes through U-shaped shift heads 115 to 117 which are engaged with the arm portion 112b of the second shift inner lever 112 and moved in the axial direction of the reciprocating shaft 5. Yes. However, the width of the engagement piece passage 113a is a size that allows only one of the shift heads to pass through 115-117. This prevents a plurality of synchromesh mechanisms operating in conjunction with the shift heads 115 to 117 from operating simultaneously.

  The shift heads 115 to 117 are projected in the radial direction on the sides of the first to third shift fork shafts 119 to 121, respectively. The first to third shift fork shafts 119 to 121 are provided with shift forks 122 to 124, respectively. Each of the shift forks 122 to 124 is engaged with a sleeve of a synchromesh mechanism of a constantly meshing 6-speed transmission. For example, the shift fork 122 is a sleeve of a 1-speed-2 speed synchromesh mechanism, the shift fork 123 is a sleeve of a 3-speed-4 speed synchromesh mechanism, and the shift fork 124 is a 5-speed-6-speed synchromesh mechanism. Each is engaged with a sleeve.

  Also in the operating force transmission mechanism 100 described above, the pin 3 through-hole 3d (see FIG. 2; not shown in FIGS. 9 to 11) with the axis 2a as the longitudinal direction is formed. It is difficult for the pin 4 to transmit the aforementioned tilting power.

[Other Embodiments]
In the embodiment described above, of the operating force transmission mechanism of the manual transmission, the rotating shaft 2, the rotating lever 3, the pin 4, the reciprocating shaft 5 (interlocking member) and the like are provided on the transmission path of the shift operating force. Although the case where it included was mentioned as an example and demonstrated, it is good also as what provided these members 2-5 etc. on the transmission path | route of select operation force.

  The present invention can be applied, for example, to an operating force transmission mechanism of a manual transmission mounted on an automobile.

1,100 Manual transmission operating force transmission mechanism 2 Rotating shaft 2a Rotating shaft axis 2b Female spline groove 3 Rotating lever 3a Rotating lever base end (annular base end)
3b Rotating lever arm 3c Female spline groove 3d Pin passage 4 Pin 5 Reciprocating shaft (interlocking member)

Claims (4)

A rotating shaft that rotates about an axis; and
A rotation lever having an annular base end portion and an arm portion extending in a radial direction from the base end portion, the base end portion being fitted to the outer peripheral portion of the rotation shaft so as not to be relatively rotatable;
A pin passed over the base end of the rotating lever and the rotating shaft,
The through hole of the pin in the base end portion of the rotating lever is formed in a long hole shape with the axial direction of the rotating shaft as a longitudinal direction.
An operating force transmission mechanism for a manual transmission. The operating force transmission mechanism of the manual transmission according to claim 1,
An interlocking member provided to be engageable with the arm portion so as to interlock with the rotation of the arm portion of the rotation lever;
Regarding the position in the axial direction of the rotating shaft, the center position of the base end portion of the rotating lever and the load center position of the arm portion of the rotating lever do not match.
An operating force transmission mechanism for a manual transmission. The operating force transmission mechanism of the manual transmission according to claim 1 or 2,
A male spline groove extending in the axial direction of the rotating shaft is formed on the outer periphery of the rotating shaft,
A female spline groove extending in the axial direction of the rotation shaft and corresponding to the male spline groove is formed on the inner peripheral portion of the base end portion of the rotation lever,
The outer peripheral portion of the rotation shaft and the base end portion of the rotation lever are fitted so as not to be relatively rotatable by fitting the male spline groove and the female spline groove.
An operating force transmission mechanism for a manual transmission. In the operating force transmission mechanism of the manual transmission according to any one of claims 1 to 3,
The rotation shaft is provided to be rotated by a shift operation force.
An operating force transmission mechanism for a manual transmission.

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