JP4904968B2 - Manual transmission for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manually operated transmission for a vehicle equipped with a positioning mechanism capable of accurately fixing a shift select shaft in shift cable adjusting work and capable of dispensing with an unnecessary component in the manually operated transmission for the vehicle equipped with the shift select shaft interlocked with a shift cable. <P>SOLUTION: An existing shift guide mechanism 82 works as a fixing mechanism 102, increase of the number of components caused by providing another fixing mechanism can be prevented, and the shift select shaft 30 can be accurately fixed in a predetermined position. Thus, a length of the shift cable 18 can be easily adjusted in shipment of the vehicle. <P>COPYRIGHT: (C)2008,JPO&amp;INPIT

Description

  The present invention relates to a manual transmission provided in a vehicle, and more particularly to a vehicle manual transmission including a shift select shaft that is linked to a shift cable.

  There is a type of vehicle manual transmission in which a shift operation by a shift lever is transmitted to a manual transmission via a shift cable. In accordance with the shift operation of the shift lever, the two shift cables work together to move the shift select shaft provided in the transmission in the shift direction and the select direction. In such a vehicle manual transmission, various shift guide mechanisms are provided for guiding the shift select shaft to rotate in the shift direction in order to eliminate a misshift during a shift. For example, in Patent Document 1, accurate shifting and shifting feeling can be achieved by engaging an engaging portion provided in a transmission case with a gate groove provided in a shift select shaft in the transmission. It is possible to improve.

JP-A-2005-351387

  By the way, in the shifting operation of the vehicle, the REV shift (reverse shift) operability is important from the viewpoint of safety, and the REV heavy select method and the REV pull color method are mainly used as methods for reducing the REV misshift (reverse shift operation). There is. In the REV heavy select system, the elastic force of the reverse select spring that restricts the shift to the reverse side provided in the transmission is set to be large, and the operation force required for the shift to the reverse side is set to be high. , REV misshift is suppressed. However, in this method, the operating force felt at the time of reverse shift varies depending on the vehicle operator, which may cause a REV misshift.

  On the other hand, in the REV pull collar system, the reverse shift cannot be selected unless the cylindrical collar provided on the outer periphery of the shift lever is pulled up. Therefore, the REV pull collar system is excellent from the viewpoint of suppressing REV misshift and suppressing REV operating force. It is considered the most effective operation method.

  When this REV pull collar system is adopted, it is necessary to set the shift lever and the vehicle manual transmission after accurately fixing the shift positions when adjusting the shift cable. Generally, when the vehicle is shipped, the shift lever is shipped in a state of being tilted to the low gear side, for example, and the shift select shaft is positioned on the low gear side so that the shift lever position corresponds to the manual transmission for the vehicle (fixed position). ), The length of the shift cable connecting the shift lever and the vehicle manual transmission needs to be adjusted. Here, in the conventional manual transmission for a vehicle including Patent Document 1, especially when the REV pull collar system is adopted, the manual transmission for a vehicle is shifted to “1st” or “2nd” on the low gear side. There is a method of fixing the shift select shaft and positioning. However, in this method, since the shift select shaft is fixed through a plurality of parts, variation in positional accuracy during positioning increases, and required positional accuracy between the shift lever and the vehicle manual transmission. It was difficult to put out.

  On the other hand, there is a method of providing a dedicated fixing mechanism such as a fixing pin only for fixing the shift select shaft to the low gear side during positioning. However, in this method, since a dedicated fixing mechanism is provided, a substantial structural review is required, and there is a problem that the number of parts is greatly increased by adding the fixing mechanism.

  The present invention has been made against the background of the above circumstances. The object of the present invention is to accurately shift the shift cable in a manual transmission for a vehicle having a shift select shaft interlocked with the shift cable. An object of the present invention is to provide a vehicle manual transmission having a positioning mechanism that can fix a select shaft and that does not require useless parts.

To achieve the above object, the gist of the invention according to claim 1 is as follows: (a) A shift disposed in the transmission case so as to be movable in the axial direction and rotatable around the axial center. A select shaft, a shift lever manually operated to move or rotate the shift select shaft, and the shift lever coupled between the shift lever and the shift select shaft, and the shift in conjunction with a shift operation of the shift lever; (B) a shift guide mechanism that guides movement in a shift direction corresponding to a shift operation of the shift select shaft by the shift lever; and (c) a shift cable for operating the select shaft. ) wherein provided on the shift guide mechanism nonrotatably and axially in a predetermined position of the shift select shaft A securing mechanism for immovably fixed, characterized in that it contains.

  According to a second aspect of the present invention, there is provided the vehicle manual transmission according to the first aspect, wherein: (a) the shift guide mechanism includes a guide pin fixed to the transmission case; and the guide pin. And a guide plate fixed to the shift select shaft, and (b) the fixing mechanism engages at least the tip end portion of the guide pin so as not to be relatively movable in the select direction. In order to make this happen, it has a concave groove formed in the guide plate.

  According to a third aspect of the present invention, there is provided the vehicle manual transmission according to the second aspect, wherein the guide pin of the shift guide mechanism is configured such that the axial direction position of the tip end portion thereof can be changed. It is characterized by being.

  According to a fourth aspect of the present invention, there is provided a vehicular manual transmission according to any one of the first to third aspects, wherein the shift lever includes a reverse inhibit for restricting a select operation to the reverse side. A mechanism is provided.

  According to the vehicle manual transmission of the first aspect of the present invention, since the existing shift guide mechanism is also provided with the fixing mechanism, the shift select shaft is provided at a predetermined position without particularly increasing the number of parts. Can be fixed with high accuracy.

  In the vehicular manual transmission according to the second aspect of the present invention, the shift select shaft is fixed by the fixing mechanism by engaging the guide pin with a concave groove formed in the guide plate. The In this way, since it is only necessary to provide the guide plate with a concave groove, the structure of the fixing mechanism is simplified.

  According to the vehicle manual transmission of the invention of claim 3, since the guide pin of the shift guide mechanism is configured such that the axial direction position of the tip portion thereof can be changed, the vehicle manual transmission of the vehicle At the time of positioning, the guide pin can function as a fixing mechanism and thereafter can function as a shift guide mechanism. Thereby, the guide pin can be used for two purposes of the shift guide mechanism and the fixing mechanism, and an increase in the number of parts can be suppressed.

  According to the fourth aspect of the present invention, since the shift lever is provided with a reverse inhibit mechanism, it is possible to suppress a reverse shift error and reduce the reverse operation force.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic view of a manual transmission mechanism 10 according to an embodiment of the present invention. The manual transmission mechanism 10 is provided in the shift lever 12 operated by the vehicle operator, the vehicle manual transmission 14 that is shifted by the shift operation of the shift lever 12, and the shift lever 12 and the vehicle manual transmission 14. Two shift cables 18 connected to the control link 16 and transmitting the shift operation of the shift lever 12 to the vehicle manual transmission 14.

  The shift cable 18 is connected between the shift lever 12 and the shift select shaft 30 via the control link 16 and operates the shift select shaft 30 in conjunction with a shift operation of the shift lever 12. It is composed of two cables, a shift cable 20 and a select cable 22, each of which includes a cable and an outer cable. The shift cable 20 is connected to the end of the rotation member 23 of the control link 16 and rotates the rotation member 23 around the rotation unit 24. The select cable 22 is connected to one end of the bell crank 26 of the control link 16 and rotates the bell crank 26 around the support portion 28. Here, when the rotation member 23 is rotated, the shift select shaft 30 indicated by the broken line provided in the vehicle manual transmission 14 is rotated, and when the bell crank 26 is rotated, the shift is performed. The select shaft 30 is moved in the axial direction. Further, the end of the shift select shaft 30 is protected by a boot 31 to prevent foreign matter from entering the vehicle manual transmission 14. In the present embodiment, the axial direction of the shift select shaft 30 is defined as the select direction, and the rotation direction is defined as the shift direction.

  FIG. 2 is an enlarged view of a main part in which the shift lever 12 that is manually operated to move or rotate the shift select shaft 30 of FIG. 1 is enlarged. The shift lever 12 of this embodiment is provided with a so-called reverse inhibit mechanism 32 that restricts the selection operation to the reverse side. In the reverse inhibit mechanism 32, the stopper 36 provided on the shift lever cap 34 and the protrusion 40 provided on the detent sleeve 38 are brought into contact with each other, whereby the arrow A direction (reverse shift direction of the shift lever 12). ) Is blocked. Here, when the collar 42 of the shift lever 12 is pulled up vertically, the detent sleeve 38 is also lifted in the same manner, the contact between the stopper 36 and the protrusion 40 is released, and the arrow A direction (reverse drive) Shift operation in the shift direction) is possible. As described above, the shift lever 12 is provided with the so-called REV pull collar type reverse inhibit mechanism 32 in which the shift operation in the reverse direction cannot be selected unless the collar 42 is pulled up vertically.

  FIG. 3 is an enlarged cross-sectional view of the main part of the shift select shaft 30 of FIG. 1, which is the main part of the present invention. The shift select shaft 30 is housed in the transmission case 44 and is held by a slide ball bearing 48 fitted to the control cover 46 so as to be rotatable about the axis and movable in the axial direction. Yes. The shift select shaft 30 is rotated in the shift direction via the connecting member of the shift cable 20 and the control link 16 by the shift operation of the shift lever 12 described above, and is selected by the select operation of the shift lever 12. It is moved in the select direction (axial direction) via the cable 22 and the bell crank 26 of the control link 16. Note that the shift operation of the present embodiment refers to an operation parallel to the arrow B shown in FIG. 2, such as movement of the shift lever 12 from the first speed to the second speed, or from the third speed to the fourth speed. The select operation indicates an operation parallel to the arrow A, such as movement of the shift lever 12 from the first speed side to the third speed side.

  An inner lever 50 is fixed to the shift select shaft 30. The inner lever 50 is spline-fitted to the shift select shaft 30 and is fixed by a slotted pin 52, and is integrally rotated with the shift select shaft 30 and moved in the axial direction. The inner lever 50 is disposed so as to straddle the inner lever 50 in order to establish each gear position by being moved in the axial direction integrally with the shift select shaft 30 by the selection operation of the shift lever 12. It is engaged with one of the shift heads. In FIG. 3, the 1st and 2nd speed shift head 54 and the 5th and 6th speed shift head 56 are shown, and the 3rd and 4th speed shift head and the reverse shift head are omitted. Further, the position of the inner lever 50 in FIG. 3 represents a state where the inner lever 50 is engaged with a third and fourth speed shift head (not shown). When the shift select shaft 30 is rotated by the shift operation of the shift lever 12 while being engaged with any of these shift heads, and the inner lever 50 is also rotated in the same manner, the engaged shift heads. Is shifted (shifted) to one side and shifted to a gear position corresponding to one side of the shift head. For example, when the inner lever 50 is rotated in the state shown in FIG. 3, a 3-4 speed shift head (not shown) is shifted and shifted to the third shift speed or the fourth shift speed.

  The inner lever 50 is in contact with a ball 60 of a lock ball assembly 58 fixed to the transmission case 44. The lock ball assembly 58 is a device for giving a sense of moderation during a speed change operation, and the ball 60 is constantly pressed against the inner lever 50 by a spring 62, and the inner lever according to a slope 64 formed on the inner lever 50. The load applied to 50 is changed to give a feeling of moderation to the vehicle operator.

  An interlock plate 66 is fitted to the shift select shaft 30 so as to be rotatable relative to the inner lever 50. Further, both ends of the interlock plate 66 in the axial direction are brought into contact with both ends of the inner lever 50 and are moved in the axial direction in conjunction with the movement of the inner lever 50 in the axial direction. The interlock plate 66 is a double meshing prevention mechanism and has a function of preventing the inner lever 50 from shifting the two shift heads simultaneously. For example, in FIG. 3, the inner lever 50 is engaged with a 3/4 speed shift head (not shown), and the interlock plate 66 allows the 1/2 speed shift head 54 and the 5/6 speed shift head 56 to shift. It is blocked.

  A plate 68 is fitted to the shift select shaft 30 so as to contact the interlock plate 66, and a spring 70 is interposed between the flange portion of the plate 68 and the control cover 46. The spring 70 biases the plate 68 toward the inner lever 50, and when the plate 68 abuts against the interlock plate 66, the interlock plate 66 and the inner lever 50 are also biased in the same direction.

  An annular guide plate 72 is fitted on the shift select shaft 30 so as to abut against the interlock plate 66. The slotted pin 74 cannot rotate relative to the shift select shaft 30 and is relatively in the axial direction. It is fixed immovable. The shift select shaft 30 is further provided with a spring holding member 78 that is prevented from moving in one axial direction by a snap ring 76, and between the spring holding member 78 and the guide plate 72. A spring 80 is interposed. The spring 80 urges the guide plate 72 toward the inner lever 50, and the interlock plate 66 and the inner lever 50 are also urged in the same direction by the guide plate 72 coming into contact with the interlock plate 66.

  A shift guide mechanism 82 is provided on the outer peripheral side of the guide plate 72. The shift guide mechanism 82 includes a plurality of protrusions 86 projecting radially from a shift guide pin 90 fixed to the transmission case 44 and an arcuate arcuate portion 84 connected to the outer peripheral edge of the guide plate. And a guide groove 88 that guides the shift guide pin 90. Note that the shift guide pin 90 of this embodiment corresponds to the guide pin of the present invention.

  FIG. 4 is an enlarged view enlarged to explain the configuration of the shift guide mechanism 82 of FIG. The shift guide pin 90 is screwed by a screw portion 94 so as to pass through a guide pin housing 92 screwed to the transmission case 44, and the axial position of the tip end portion of the shift guide pin 90 by the screw portion 94. Can be changed. A snap ring 96 is fitted on the shift guide pin 90, and the position of the shift guide pin 90 is adjusted to a position where the snap ring 96 comes into contact with the end surface of the guide pin housing 92. This position is a position at which the tip end portion of the shift guide pin 90 can be engaged with a guide groove 88 formed by a projection 86 projecting radially from the arc portion 84. Further, a C-ring 98 functioning as a spacer is interposed between the shift guide pin 90 and the guide pin housing 92, and a seal member 99 is interposed between the guide pin housing 92 and the transmission case 44. Has been.

  In the present embodiment, six projecting portions 86 project from the arc portion 84 of the guide plate 72, and a plurality of guide grooves 88 are formed by these projecting portions 86. The arc portion 84 is formed with a concave hole 100 having a circular cross section. The concave hole 100 is for engaging the shift guide pin 90 to restrict the selection direction of the guide plate 72 and the shift select shaft 30 fixed to the guide plate 72 and movement in the shift direction. The depth of the recessed hole 100 is set to such a depth that the shift guide pin 90 is not detached from the recessed hole 100 when the shift guide pin 90 is engaged. Moreover, the recessed hole 100 of a present Example respond | corresponds to the recessed groove of this invention.

  5 is a C arrow view of the shift guide mechanism 82 of FIG. The groove width of the guide groove 88 is a groove width through which the shift guide pin 90 can pass. When the shift guide pin 90 is engaged in each guide groove 88, each shift stage is established. For example, when the gear is shifted to the first gear, the shift guide pin 90 is moved along the guide groove 88 to a position 90a indicated by a broken line. Further, when the gear is shifted to the second gear, it is moved along the guide groove 88 to a position 90b indicated by a broken line. When the gear is shifted to the third gear, the distance indicated by 90c is indicated along the guide groove 88 by a broken line. When it is moved to the position and shifted to the fourth speed, it is moved along the guide groove 88 to the position 90d indicated by a broken line, and when it is shifted to the fifth speed, it is broken along the guide groove 88. When the gear is moved to the position 90e shown in FIG. 6 and shifted to the sixth speed, it is moved to the position 90f shown by the broken line by the guide groove 88. Further, when the gear is shifted to the reverse gear, it is moved to a position 90g indicated by a broken line. As described above, the shift guide mechanism 82 guides the movement in the shift direction corresponding to the shift operation by the shift lever 12 of the shift select shaft 30, thereby enabling an accurate shift operation and improving the shift feeling. it can.

  Next, the function of the fixing mechanism 102 which is a main part of the present invention will be described. As described above, the shift lever 12 of this embodiment is provided with the REV pull collar type reverse inhibit mechanism 32. When the vehicle is shipped, the shift lever 12 is, for example, a stopper of the shift lever 12 as shown in FIG. It is shipped in a state where it is moved to a position (low gear side position) where 36 and the protrusion 40 are brought into contact with each other. In addition, it is necessary to adjust the length of the shift cable 18 that connects the shift lever 12 and the shift select shaft 30 after the vehicle is shipped. In this adjustment, the automatic transmission 14 corresponds to the low gear side position of the shift lever 12. It is necessary to carry out in a state where it is fixed at the position to be. Therefore, in this embodiment, the concave hole 100 is formed in the arc portion 84 of the guide plate 72 constituting the shift guide mechanism 82, and the distal end portion of the shift guide pin 90 is moved relative to the concave hole 100 in the select direction and the shift direction. The shift select shaft 30 is fixed at a predetermined position by being impossiblely engaged.

  FIG. 6 shows a state in which the tip of the shift guide pin 90 is engaged with the recessed hole 100 formed in the guide plate 72. By being engaged in this way, the guide plate 72 and the shift select shaft 30 integrally connected to the guide plate 72 are fixed so as not to move in the shift direction (rotating direction) and the select direction (axial direction). Has been. Here, in FIG. 6, the C-ring 98 shown in FIG. 4 is removed, and the shift guide pin 90 is further screwed in by the thickness of the C-ring 98, so that the distal end portion and the recessed hole of the shift guide pin 90 are recessed. 100 can be engaged. As shown in FIG. 5, the recessed hole 100 has a neutral position (intermediate position) in the shift direction and a low gear side position 90 a and a second gear position in the select direction. 90b is formed at a position on the further reverse gear stage side, and corresponds to the position where the stopper 36 and the protrusion 40 of the shift lever 12 shown in FIG. In this state, when the length of the shift cable 18 is adjusted, the shift state of the shift lever 12 and the shift state of the vehicle manual transmission 14 are set to coincide with each other. Is possible. The predetermined position of the shift select shaft of the present invention is a position fixed by being engaged with the recessed hole 100 in this embodiment, and a shift position corresponding to the shift position of the shift lever 12 is defined. Show.

  After adjusting the length of the shift cable 18, the shift guide pin 90 is moved to a position where the snap ring 96 fitted to the shift guide pin 90 contacts the guide pin housing 92, as shown in FIG. 4. The shift guide pin 90 can be caused to function as a guide pin of the shift guide mechanism 82 by returning and inserting the C ring 98 into the space formed thereby.

  As described above, according to the vehicle manual transmission 14 of the present embodiment, since the existing shift guide mechanism 82 is also provided with the fixing mechanism 102, the number of parts can be increased by providing a separate fixing mechanism. The shift select shaft 30 can be accurately fixed at a predetermined position. Thereby, the length adjustment of the shift cable 18 at the time of vehicle shipment can be implemented easily.

  Further, according to the vehicle manual transmission 14 of the present embodiment, the fixing mechanism 102 engages the shift guide pin 90 in the recessed hole 100 formed in the guide plate 72, thereby fixing the shift select shaft 30. Is done. Thus, since it is only necessary to provide the guide plate 72 with the concave hole 100, the structure of the fixing mechanism 102 is simplified.

  Further, according to the vehicle manual transmission 14 of the present embodiment, the shift guide pin 90 of the shift guide mechanism 82 is configured so that the position of the tip end in the axial direction can be changed. 14, the shift guide pin 90 can function as the fixing mechanism 102 and thereafter function as the shift guide mechanism 82. Thereby, the shift guide pin 90 can be used for two purposes of the shift guide mechanism 82 and the fixing mechanism 102, and the increase in the number of parts can be suppressed.

  Further, according to the vehicle manual transmission 14 of the present embodiment, since the shift lever 12 is provided with the reverse inhibit mechanism 32, it is possible to suppress the reverse shift error and reduce the reverse operation force.

  As mentioned above, although the Example of this invention was described in detail based on drawing, this invention is applied also in another aspect.

  For example, the concave hole 100 of the above-described embodiment is formed in a circular shape and is prevented from moving in the shift direction and the select direction, but positioning adjustment is performed only by preventing the shift select shaft 30 from moving at least in the select direction. The shape can be freely changed as long as it has a shape that prevents the shift select shaft 30 from moving in the select direction, for example, it is deformed into a longitudinal groove having a length in the shift direction of the recessed hole 100 increased. .

  Further, the guide groove 88 and the recessed hole 100 of the shift guide mechanism 82 described above are formed in the guide plate 72 integrally connected to the shift select shaft 30, but the recessed hole 100 is directly provided in the shift select shaft 30. Can also be implemented.

  In addition, the vehicle manual transmission 14 of the above-described embodiment is a vehicle manual transmission having six forward speeds and one reverse speed, but the number of shift speeds is not particularly limited. The present invention can also be applied to a vehicular manual transmission having one stage or a reverse speed or a vehicular manual transmission having a higher stage.

  Further, although the six projections 86 in the above-described embodiment are provided, the number of projections 86 and the number of guide grooves 88 formed by the projections 86 can be freely changed according to the number of shift stages of the vehicle manual transmission. In the present embodiment, the guide groove 88 for guiding the reverse shift can be additionally provided.

  Further, the position of the recessed hole 100 in the above-described embodiment is formed at a position on the further reverse gear stage side of the first gear position 90a and the second gear position 90b which are positions on the low gear side in the select direction. However, the position of the concave hole 100 can be freely changed within a range in which the consistency between the shift lever 12 and the vehicle manual transmission 14 can be obtained.

  Further, the shift guide pin 90 of the above-described embodiment can be changed in the axial direction position by a screw mechanism. For example, the shift guide pin 90 has a structure that can be changed by hydraulic pressure. The axial direction position may be changeable by other configurations.

  Further, the shift lever 12 of the above-described embodiment is provided with a reverse inhibit mechanism 32 of a so-called REV pull color system, but the present invention is not necessarily limited to the REV pull color system, and the shift lever 18 is connected via the shift cable 18. The present invention can be applied to any type of vehicle manual transmission that can be shifted in speed.

  The above description is only an embodiment, and the present invention can be implemented in variously modified and improved forms based on the knowledge of those skilled in the art.

It is the schematic of the manual transmission mechanism which is one Example of this invention. It is the principal part enlarged view which expanded the shift lever 12 of FIG. FIG. 2 is an enlarged cross-sectional view of a main part around a shift select shaft in FIG. 1. It is an enlarged view for demonstrating the shift guide mechanism of FIG. FIG. 5 is a C arrow view of the shift guide mechanism of FIG. 4 as viewed from the direction of arrow C. It is sectional drawing for demonstrating the state by which the front-end | tip part of the shift guide pin is engaged with the concave hole currently formed in the guide plate.

Explanation of symbols

  12: Shift lever 14: Manual transmission 18 for vehicle 18: Shift cable 30: Shift select shaft 32: Reverse inhibit mechanism 44: Transmission case 72: Guide plate 82: Shift guide mechanism 88: Guide groove 90: Shift guide pin (guide) 100): Recessed hole (recessed groove) 102: Fixing mechanism

Claims (4)

A shift select shaft disposed in the transmission case so as to be movable in the axial direction and rotatable about the axial center; and a shift lever manually operated to move or rotate the shift select shaft; A vehicle manual transmission comprising: a shift cable coupled between the shift lever and the shift select shaft and operating the shift select shaft in conjunction with a shift operation of the shift lever;
A shift guide mechanism for guiding movement in a shift direction corresponding to a shift operation by the shift lever of the shift select shaft;
A vehicle manual transmission, comprising: a fixing mechanism that is provided in the shift guide mechanism and fixes the shift select shaft to a predetermined position so that the shift select shaft can not rotate and cannot move in the axial direction . The shift guide mechanism includes a guide pin that is fixed to the transmission case, and a guide plate that has a guide groove that guides the guide pin and is fixed to the shift select shaft.
2. The vehicle manual transmission according to claim 1, wherein the fixing mechanism has a concave groove formed in the guide plate to engage at least a tip end portion of the guide pin so as not to be relatively movable in the select direction. .   The manual transmission for a vehicle according to claim 2, wherein the guide pin of the shift guide mechanism is configured such that a position in an axial direction of a tip end portion thereof can be changed.   The vehicle manual transmission according to any one of claims 1 to 3, wherein the shift lever is provided with a reverse inhibit mechanism for restricting a select operation to the reverse side.

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