JP2017096487A - Gear change operation mechanism of transmission and its assembling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gear change operation mechanism of a transmission which can be simplified in constitution, made compact in size and reduced in weight as a whole while enabling the inversion of a plurality of shift forks in a moving direction.SOLUTION: A gear change operation mechanism of a transmission comprises a first control rod 41 communicating with a change lever 200, and a second control rod 42 which is arranged at the first control rod 41 in parallel therewith, and selectively engaged with a plurality of the shift forks 154, 164. The first and second control rods 41, 42 communicate with each other via an inversion lever 51 which axially moves the second control rod 42 to a side opposite to a moving direction of the first control rod 41 at a shift operation.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a speed change operation mechanism of a transmission mounted on a vehicle, and belongs to the field of vehicle power transmission technology.

  Generally, a transmission mechanism of a manual transmission mounted on a front engine / rear drive type vehicle (FR vehicle) is arranged in parallel with an input shaft connected to an output shaft of an engine via a clutch and the input shaft. And a counter shaft and an output shaft disposed on the same axis as the input shaft and connected to the drive wheel side via the propeller shaft. The input shaft and the output shaft constitute a main shaft by being fitted to each other so as to be relatively rotatable.

  A plurality of forward gear trains, usually one reverse gear train and one reduction gear train are provided between the main shaft and the counter shaft. The reduction gear train and the forward gear train are generally always meshed, and the reverse gear train is always meshed or selectively slidable.

  The reduction gear train is composed of a pair of fixed gears that reduce and transmit rotation between the main shaft and the countershaft, and is always in a power transmission state regardless of the gear position.

  The forward gear train includes a fixed gear fixed to one of the main shaft or the counter shaft, and a loosely fitted gear that is loosely fitted to the other shaft and always meshes with the fixed gear. By synchronizing the rotation of the shaft, the power transmission state in this gear train is smoothly realized. Note that a gear train is not provided in the direct transmission speed stage that directly connects the input shaft and the output shaft, and the realization of the direct connection speed stage is achieved by synchronizing the rotation of the input shaft and the output shaft by the synchronization device.

  When the reverse gear train is always meshed, the fixed gear provided on one of the main shaft or the counter shaft, the loosely-fitted gear provided on the other shaft, and interposed between these gears. A reversing gear for reversing the rotation direction, and the synchronizer synchronizes the rotation of the loosely-fitted gear and the shaft to achieve a power transmission state.

  The above gear trains are arranged side by side in the axial direction (vehicle longitudinal direction), but the reduction gear train is usually arranged closest to the engine side (front side of the vehicle body) or closest to the drive wheels (back side of the vehicle body). The speed change mechanism in which the speed reduction gear train is arranged on the foremost side is called an input reduction type. In this type, the rotation input to the input shaft from the engine side is first decelerated in the speed reduction gear train to the counter shaft. Then, it is transmitted from the counter shaft to the output shaft through a gear train corresponding to a desired gear stage. On the other hand, the speed change mechanism in which the speed reduction gear train is arranged at the rearmost side is called an output reduction type. In this type, the rotation input to the input shaft first passes through the gear train corresponding to the desired gear stage. The rotation of the counter shaft is decelerated in the reduction gear train and transmitted to the output shaft. In any type, since the input shaft and the output shaft are directly connected in the direct connection speed, the rotation of the input shaft is directly transmitted to the output shaft without passing through any gear train.

  The synchronization device provided in this type of speed change mechanism is usually provided with a synchro sleeve arranged on the main shaft or the counter shaft, and the synchronization device is operated by sliding the synchro sleeve to one side in the axial direction. Then, the loosely fitted gear of the gear train adjacent to this one side is fixed to the shaft, and the gear train is in a power transmission state.

  The synchronizer may be used for two gear trains adjacent to both sides on the shaft. For example, in the case of a manual transmission with six forward speeds, for the first to second speeds used for both the first speed and the second speed, Synchronizers may be provided for 3-4 speed, which is used for 3rd speed and 4th speed, and for 5-6 speed, which is used for 5th speed and 6th speed.

  The manual transmission is provided with a speed change operation mechanism for performing speed change by the operation of the synchronization device as described above. The shift operation mechanism is usually provided with a control rod that rotates and moves in the axial direction in conjunction with a change lever select operation and a shift operation.

  In a shift operation mechanism of a manual transmission mounted on an FR vehicle, a control rod is usually arranged in parallel with a main shaft and a counter shaft of the transmission mechanism. In this case, the control rod and the shift finger fixed thereto rotate in conjunction with the change lever select operation, and the lever portion of the shift finger is engaged with the shift fork corresponding to the gear selected by the select operation. Match. When the change lever is shifted in this state, the control rod moves in the axial direction together with the shift finger, and the shift fork engaged with the lever portion of the shift finger moves in the axial direction. As a result, the synchronizing sleeve of the synchronizer engaged with the shift fork moves in the axial direction together with the shift fork, so that the synchronizer operates and the gear train of a desired shift stage is in a power transmission state.

  The change lever and the control rod are connected to each other with a so-called cable method in which a select cable and a shift cable are interposed between them, and the lower end side of the change lever is directly engaged with the control rod without interposing the cable. There is a so-called rod system in which the lower end side of the change lever is engaged with a change rod connected to the rear end side of the control rod via a universal joint or the like.

  The change lever generally includes an upper lever portion extending from the large sphere portion to the knob upward and a lower lever portion extending from the large sphere portion to the engaging portion with the control rod side downward. It is provided so as to be swingable with the center of the sphere as a fulcrum. When the change lever is swung by a select operation or a shift operation, the lower end of the lower lever portion always moves to the opposite side to the knob at the upper end of the upper lever portion.

  Therefore, in a rod-type speed change operation mechanism, when the control rod engaged directly or indirectly with the lower end side of the change lever moves the knob at the upper end of the change lever to the front side of the vehicle body or the rear side of the vehicle body by the shift operation. , It moves in the axial direction in the opposite direction to the knob. Then, the shift fork engaged with the shift finger on the control rod and the synchro sleeve of the synchronizing device engaged therewith usually move in the same direction as the control rod (the direction opposite to the shift operation direction). .

  On the other hand, the shift operation direction is determined for each gear position according to the shift pattern. For example, in the forward gear, the shift to the odd gear is normally performed by a shift operation toward the front side of the vehicle body, and the shift to the even gear step is performed by a shift operation toward the rear side of the vehicle body.

  The order of arrangement of the gear trains of the respective speed stages in the speed change mechanism and the corresponding synchronizers is determined in consideration of the shift operation direction. For example, when a rod-type speed change operation mechanism is employed, in a speed change mechanism equipped with a synchronizer for 1-2 speed, 3-4 speed, and 5-6 speed as described above, only the shift operation direction is provided. In consideration of this, a layout in which an odd-numbered gear train is arranged on the rear side of the vehicle body and an even-numbered gear train is arranged on the front side of the vehicle body is adopted for each synchronization device.

  On the other hand, in the layout design of the gear trains and synchronizers of each shift stage, in addition to the shift operation direction, corresponding to the selection of the input reduction type or the output reduction type described above, the cable system of the shift operation mechanism or It should be compatible with the selection of the rod system, a low-speed gear train that requires a large torque should be placed near the bearing, and the oil collected at the bottom of the transmission case for lubrication can be scraped up. Various conditions are considered, such as the arrangement of a gear with a diameter.

  For example, in an output reduction type speed change mechanism, when a first-speed gear train to which a large torque is applied is arranged in the front row to approach the front-most bearing of the transmission, or when the direct-coupled gear stage is 6th gear. The connecting portion between the input shaft and the output shaft may be disposed on the rear side of the vehicle body with respect to the gear trains of all other speed stages. In this case, the first-speed gear train is located on the vehicle body front side of the first-second speed synchronizer, and the connection portion between the input shaft and the output shaft is located on the vehicle body rear side of the fifth-speed gear synchronizer. . Then, when the rod method is adopted, the control rod moves in the axial direction to the rear side of the vehicle when the first-speed or fifth-speed shift operation is performed, and moves axially to the front side of the vehicle body when the second-speed or sixth-speed shift operation is performed. On the other hand, the moving direction of the sync sleeve of the 1-2 speed synchronizer or the 5-6 speed synchronizer during these shift operations is opposite to the moving direction of the control rod.

  In this way, when a gear train that does not correspond to the shift operation direction is included in the speed change mechanism, for example, as in the speed change operation mechanism disclosed in Patent Document 1, the shift direction of a predetermined gear stage is reversed to synchronize. A reversing mechanism for transmitting to the sleeve side may be provided, and this makes it possible to match the relationship between the shift operation direction and the moving direction of the synchro sleeve to other shift stages.

  Specifically, in the transmission mechanism of the manual transmission disclosed in Patent Document 1, since the synchronization device is used for both the fifth speed and the reverse, the synchronization is performed when shifting to the fifth speed and when shifting to the reverse. The sliding direction of the sleeve is opposite. On the other hand, the shift pattern is configured such that the shift operation directions to the fifth speed and the reverse are both forward directions, so that either one of the shift operation directions is reversed to the synchro sleeve. It is necessary to communicate.

  Therefore, the speed change mechanism of Patent Document 1 includes a first shift rod that moves in the axial direction in conjunction with a shift operation to the fifth speed, and a second shift rod that is arranged in parallel to the first shift rod. A reversing mechanism for reversing the direction of the shift operation to the fifth speed is provided therebetween, and the synchro sleeve of the fifth-speed / reverse synchronizer is engaged with the shift fork fixed to the second shift rod.

  Specifically, the reversing mechanism of Patent Document 1 includes a support shaft that extends in a direction perpendicular to the rods between the first and second shift rods, and a lever member that is rotatably supported by the support shaft. Yes. The lever member includes a first lever portion extending in the radial direction from the support shaft, and a second lever portion extending in the radial direction from the support shaft toward the opposite side of the first lever portion. The leading end is engaged with the engaging recess of the first shift rod, and the leading end of the second lever portion is engaged with the engaging recess of the second shift rod.

  When a reverse shift operation is performed, the shift motion generated thereby is transmitted directly to the second shift rod without passing through the first shift rod, and the shift fork is moved in the axial direction together with the second shift rod. By sliding to the side, the synchro sleeve of the synchronizer is slid in the same direction, and the reverse gear train enters the power transmission state.

  On the other hand, when the shift operation to the fifth speed is performed, the shift motion is first transmitted to the first shift rod, and the first shift rod is slid to the one side in the axial direction, and the first shift rod When the lever member of the reversing mechanism engaged with the pivot member rotates about the support shaft, the shift fork is slid to the other side in the axial direction together with the second shift rod engaged with the lever member. As a result, the synchro sleeve of the synchronizer is slid to the opposite side to the reverse shift, and the fifth gear train is in the power transmission state.

JP 2013-113387 A

  However, depending on the order of the gear trains and the synchronizers of the respective speed stages in the axial direction of the speed change mechanism, it is necessary to reverse the movement direction of the shift fork corresponding to the plurality of synchronizers.

  For this reason, if a plurality of reversing mechanisms are provided in the speed change operation mechanism, the number of shift rods increases as the number of reversing mechanisms increases, the space occupied by the speed change operation mechanism in the transmission case increases, Increase the weight of the machine.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission operating mechanism for a transmission that can be simplified, made compact, and lightweight as a whole while allowing the moving directions of a plurality of shift forks to be reversed.

  In order to solve the above-mentioned problems, a transmission operating mechanism and a method for assembling the transmission according to the present invention are configured as follows.

First, the invention according to claim 1 of the present application is
A control rod connected to the change lever so as to rotate during the select operation and move in the axial direction during the shift operation, and selectively engaged with the control rod and coupled with the axial movement of the control rod. A shift operation mechanism for a transmission comprising a plurality of shift forks that actuate a synchronization device by being moved in a direction,
The control rod includes a first control rod communicated with the change lever, and a second control rod disposed in parallel to the first control rod and selectively engaged with the plurality of shift forks.
The first and second control rods are in communication with each other via a reversing lever that moves the second control rod in the axial direction to the opposite side of the movement direction of the first control rod during a shift operation. Features.

According to a second aspect of the present invention, there is provided a transmission operation mechanism for a transmission according to the second aspect of the present invention.
The reversing lever causes the first and second control rods to communicate with each other so that the second control rod is rotated in a direction opposite to the rotation direction of the first control rod during a selection operation. Features.

Furthermore, the speed change operation mechanism of the transmission according to the invention described in claim 3 is the invention according to claim 1 or 2,
A sleeve member that rotates in conjunction with the rotation of the one rod and whose axial movement is restricted is fitted to either one of the first or second control rods,
The reversing lever is supported on a support shaft attached to the sleeve member so as to be swingable around an axis of the support shaft.

According to a fourth aspect of the present invention, there is provided a transmission operation mechanism for a transmission according to the third aspect of the present invention.
The first control rod has a first engagement portion that is engaged with one end of the reversing lever so as to swing the reversing lever in conjunction with the axial movement of the first control rod during a shift operation. Provided,
A second engagement engaged with the other end of the reversing lever so as to move the second control rod in the axial direction in conjunction with the swing of the reversing lever during a shift operation. A portion is provided.

According to a fifth aspect of the present invention, there is provided a transmission operation mechanism for a transmission according to the fourth aspect of the present invention.
A spherical portion is provided at the end of the reversing lever opposite to the one rod,
The first or second engaging portion is a hole into which the spherical portion is fitted.

Furthermore, the speed change operation mechanism of the transmission according to the invention of claim 6 is the invention according to any one of claims 3 to 5,
A transmission case that houses the transmission mechanism of the transmission includes a first case member and a second case member that are coupled to each other.
The sleeve member is engaged with the transmission case such that axial movement to one side is restricted by the first case member and axial movement to the other side is restricted by the second case member. It is characterized by.

Furthermore, the speed change operation mechanism of the transmission according to the invention of claim 7 is the invention according to any one of claims 3 to 6,
The sleeve member includes a peripheral wall portion surrounding the one rod,
The reversing lever is provided so as to penetrate the peripheral wall portion, and is engaged with the one rod inside the peripheral wall portion.

A transmission operation mechanism of a transmission according to the invention described in claim 8 is the invention according to claim 6,
The sleeve member has a first restricted portion whose axial movement to the one side is restricted by contacting the first case member, and a shaft to the other side by contacting the second case member. A second restricted portion in which direction movement is restricted, and a communication portion that connects between the first restricted portion and the second restricted portion,
The one rod is provided with a protrusion protruding outward from the outer peripheral surface of the rod,
The connecting portion is provided with an engagement hole that is engaged with the protrusion.

Furthermore, the invention according to claim 9 is an assembling method of a transmission operation mechanism of a transmission including a control rod that communicates between a change lever and a plurality of synchronization devices,
The control rod includes a first control rod communicated with the change lever, and a second control rod disposed in parallel to the first control rod and selectively communicated with the plurality of synchronization devices,
One end side of the reversing lever that moves the second control rod in the axial direction to the side opposite to the moving direction of the first control rod when the first control rod moves in the axial direction is either the first or second control rod. A first engagement step for engaging with one of the rods;
A subassembly step of assembling the reversing lever to the one rod;
A second engagement step of engaging the other end of the reversing lever with the other rod of the first or second control rod;
And a case assembling step of assembling the first and second control rods and the reversing lever to the transmission case after the sub-assembly step.

  The order in which the first engagement process, the subassembly process, the second engagement process, and the case assembly process are performed is arbitrary except that the case assembly process is performed after the subassembly process.

  According to the first aspect of the present invention, the reversing lever provided between the first control rod communicated with the change lever and the second control rod selectively engaged with the plurality of shift forks. Thus, since the moving direction of the second control rod during the shift operation is reversed with respect to the moving direction of the first control rod, the moving direction of all the shift forks can be reversed by one reversing lever. Therefore, compared with the case where a reverse lever is provided for each shift fork in order to reverse the moving direction of the plurality of shift forks, the number of reverse levers and the parts associated therewith can be reduced, and the speed change mechanism can be reduced in weight. be able to.

  According to the second aspect of the present invention, the reversing lever that reverses the moving direction during the shift operation is used to change the rotation direction of the second control rod with respect to the rotation direction of the first control rod during the select operation. Can be reversed. Further, since the movement of the select operation via the reversing lever is transmitted between the first and second control rods, the transmission mechanism dedicated to the selection is omitted, thereby reducing the number of parts and the speed change operation mechanism. The configuration can be simplified, downsized, and reduced in weight.

  According to the third aspect of the present invention, since the support shaft that supports the reversing lever is attached to the sleeve member fitted to one of the first and second control rods, the transmission case Unlike the case where the support shaft is attached to the transmission lever, the reversing lever can be supported with a simple configuration without providing a mounting hole or a boss portion in the transmission case.

  According to the fourth aspect of the present invention, when the first control rod moves to one side in the axial direction in conjunction with the shift operation, one end side is engaged with the first engagement portion of the first control rod. The reversing lever swings around the axis of the support shaft attached to the sleeve member, and the second control rod engaged with the other end of the reversing lever at the second engaging portion swings the reversing lever. In conjunction with this, it moves in the axial direction to the opposite side of the first control rod. Thereby, reversal of the moving direction of the 2nd control rod with respect to the moving direction of the 1st control rod at the time of shift operation is realizable by simple composition.

  According to the fifth aspect of the present invention, the spherical portion provided at the end of the reversing lever is fitted into the hole as the first or second engaging portion provided in the first or second control rod. Thus, the spherical portion of the reversing lever is smoothly pushed in the circumferential direction and the axial direction of the first control rod by the first engaging portion, or the second engaging portion is secondly moved by the spherical portion of the reversing lever. It can be pushed in smoothly in the circumferential direction and axial direction of the control rod. Accordingly, smooth motion transmission from the first control rod to the second control rod via the reversing lever can be realized in both the select operation and the shift operation.

  According to the sixth aspect of the invention, the sleeve member is firmly supported from both sides in the axial direction by using the joint portion of the first and second case members constituting the transmission case. The axial movement of the sleeve member can be restricted. Therefore, it is not necessary to attach a positioning dedicated component to the transmission case, or to provide a mounting hole or boss in the transmission case, and the axial movement of the sleeve member can be restricted with a simple configuration.

  According to the seventh aspect of the present invention, since the one end portion of the reversing lever is engaged with one of the first and second control rods inside the peripheral wall portion of the sleeve member, one end portion of the reversing lever. Compared with the case where is disposed outside the peripheral wall portion, the other end portions of the support shaft and the reversing lever are easily disposed close to the other rod. Therefore, the second control rod can be easily placed close to the first control rod, and this makes it easy to form the speed change operation mechanism in a compact manner.

  According to the eighth aspect of the present invention, the axial movement of the sleeve member and the support shaft supported by the sleeve member is restricted by restricting the axial movement of the first and second restricted portions of the sleeve member. Has been. Therefore, during the shift operation, the reversing lever can be swung around the support shaft in which the movement in the axial direction is restricted, so that the movement direction of the second control rod can be reliably made relative to the movement direction of the first control rod. Can be reversed. In addition, since a protrusion protruding outward from the outer peripheral surface of one of the first and second control rods is engaged with the engagement hole provided in the connecting portion of the sleeve member, the select operation can be performed. The rotation of the one rod and the rotation of the sleeve member around the axis of the rod can be interlocked with each other, thereby utilizing the reversing lever supported by the sleeve member via the support shaft. Thus, it is possible to transmit the select motion between the first and second control rods.

  According to the eighth aspect of the present invention, the sleeve member can have a simple configuration in which the first restricted portion and the second restricted portion are connected by the communication portion. Furthermore, the sleeve member having such a configuration is easy to produce by press molding. Further, the sleeve member can be reduced in weight by forming each part of the sleeve member thinly by press molding or the like.

  According to the invention described in claim 9, the first control rod communicated with the change lever, the second control rod selectively engaged with the plurality of shift forks, and the first control rod at the time of the shift operation When assembling the transmission operating mechanism of the transmission having a reversing lever that reverses the moving direction of the second control rod with respect to the moving direction, the reversing lever that connects the first and second control rods is assembled to the transmission case. Since it is sub-assembled to either one of the first or second control rods in advance, the assembling work of the shift operation mechanism to the transmission case can be simplified.

  Further, in the speed change operation mechanism assembled in this way, at the time of shift operation, all the shift forks connected to the second control rod are connected by one reversing lever provided between the first and second control rods. The moving direction can be reversed. Therefore, compared with the case where a reverse lever is provided for each shift fork in order to reverse the moving direction of the plurality of shift forks, the number of reverse levers and the parts associated therewith can be reduced, and the speed change mechanism can be reduced in weight. be able to.

It is a skeleton diagram showing a transmission mechanism of a transmission having a transmission operation mechanism according to the first embodiment of the present invention. It is a figure which shows the shift pattern of the speed change operation mechanism which concerns on 1st Embodiment. It is a side view which shows typically the relationship between the shift operation direction and the moving direction of each rod. It is an expanded view which shows the speed change operation mechanism which concerns on 1st Embodiment. It is a disassembled perspective view which shows the 1st lever end and sleeve member which were provided in the 1st control rod. FIG. 5 is a cross-sectional view taken along the line BB in FIG. 4 showing the reversing mechanism in an enlarged manner. It is CC sectional view taken on the line of FIG. 6 which expands and shows the inversion mechanism. It is the EE sectional view taken on the line of FIG. 4 which shows a part of the inversion mechanism, and a guide plate. It is a perspective view which shows the shift finger set provided in the 2nd control rod. It is a disassembled perspective view which shows a shift finger and an interlock control member. FIG. 5 is a cross-sectional view taken along line FF in FIG. 4 showing a first shift finger set and its peripheral part. It is the GG sectional view taken on the line of FIG. 4 which shows a 2nd shift finger set and its peripheral part. It is sectional drawing similar to FIG. 6 which shows the inversion mechanism in a 5-6 speed select state. It is sectional drawing similar to FIG. 11 which shows the 1st shift finger set and its peripheral part in the same state. It is sectional drawing similar to FIG. 12 which shows the 2nd shift finger set and its peripheral part in the same state. FIG. 5 is a developed view similar to FIG. 4 showing the speed change operation mechanism in a 4-speed shift state. It is an expanded view which shows the speed change operation mechanism of the transmission which concerns on 2nd Embodiment of this invention. It is the HH sectional view taken on the line of FIG. 17 which expands and shows the inversion mechanism in 2nd Embodiment. It is an expanded view which shows the speed change operation mechanism of the transmission which concerns on 3rd Embodiment of this invention. It is the II sectional view taken on the line of FIG. 19 which expands and shows the inversion mechanism in 3rd Embodiment. It is an expanded view which shows the speed change operation mechanism of the transmission which concerns on 4th Embodiment of this invention. It is a disassembled perspective view which shows the 1st lever end and sleeve member in 4th Embodiment. It is the JJ sectional view taken on the line of FIG. 21 which expands and shows the inversion mechanism in 4th Embodiment. FIG. 22 is a developed view similar to FIG. 21 showing the speed change operation mechanism in the fourth speed shift state. It is sectional drawing similar to FIG. 23 which shows the inversion mechanism in 5-6 speed selection state. It is a figure for demonstrating an example of the assembly | attachment procedure of a reversing lever. It is a figure for demonstrating another example of the assembly | attachment procedure of a reverse lever. It is an expanded view which shows the speed change operation mechanism of the transmission which concerns on 5th Embodiment of this invention.

  Hereinafter, a transmission operation mechanism of a transmission according to the present invention will be described for each embodiment with reference to the accompanying drawings.

[First Embodiment]
The transmission operation mechanism 40 of the transmission according to the first embodiment is provided, for example, in a vertical manual transmission that is mounted on an FR vehicle. The manual transmission has, for example, six forward speeds and one reverse speed, and includes a speed change mechanism 4 shown in FIG.

[Transmission mechanism]
As shown in FIG. 1, the speed change mechanism 4 includes a main shaft 5 that extends in the longitudinal direction of the vehicle body, and a counter shaft 8 that is arranged in parallel to the main shaft 5. The counter shaft 8 is disposed obliquely below the main shaft 5 when viewed from the axial direction (see FIGS. 11 and 12).

  The main shaft 5 is disposed on the same axis as the input shaft 6 on the rear side of the vehicle body of the input shaft 6 via the clutch 199 and is connected to the driving wheel side. Output shaft 7. A front end portion of the output shaft 7 is provided with a fitting portion 7 a that is rotatably fitted to the rear end portion of the input shaft 6.

  Between the main shaft 5 and the countershaft 8, a plurality of constantly meshing gear trains G0, G1, G2, G3, G4, G5, GR are provided. Specifically, between the input shaft 6 of the main shaft 5 and the countershaft 8, a reverse gear train GR, a first gear train G1, a second gear train G2, a third gear train G3, and a fourth gear train. A gear train G4 and a 5-speed gear train G5 are provided in this order from the front side of the vehicle body, and a reduction gear train G0 is provided between the output shaft 7 of the main shaft 5 and the counter shaft 8.

  The transmission mechanism 4 is a 6-speed direct connection type, and since the input shaft 6 and the output shaft 7 are directly connected in the direct connection speed stage, a 6-speed gear train is not provided.

  As described above, the reduction gear train G0 is provided on the output shaft 7 side, so that a so-called output reduction type transmission mechanism 4 is configured. The reduction gear train G0 includes a drive gear 26 fixed to the counter shaft 8 and a driven gear 16 fixed to the output shaft 7. The driven gear 16 has a diameter larger than that of the drive gear 26, whereby the rotation of the countershaft 8 is decelerated via the reduction gear train G0 and transmitted to the output shaft 7 at a gear other than the direct gear. .

  The first- and second-speed gear trains G1 and G2 include drive gears 11 and 12 fixed to the input shaft 6 and driven gears 21 and 22 loosely fitted to the counter shaft 8. The gear trains G3, G4, and G5 for the third speed, the fourth speed, and the fifth speed include drive gears 13, 14, and 15 that are loosely fitted to the input shaft 6, and driven gears 23 and 24 that are fixed to the counter shaft 8. 25.

  The reverse gear train GR is loosely fitted to a drive gear 10 fixed to the input shaft 6, a driven gear 20 loosely fitted to the countershaft 8, and a reverse shaft 9 arranged in parallel to the input shaft 6 and the countershaft 8. The intermediate gear 30 is provided. In the reverse gear train GR, the intermediate gear 30 is interposed between the drive gear 10 and the driven gear 20, so that the rotation in the direction opposite to the forward direction is transmitted to the counter shaft 8 and the output shaft 7.

  Further, the counter shaft 8 is provided with synchronizers 31 and 32 for synchronizing the rotation of the counter shaft 8 with the driven gears 20, 21, and 22 of the gear trains G1, G2, and GR for the first speed, the second speed, and the reverse. The input shaft 6 synchronizes the rotation of the input shaft 6 with the drive gears 13, 14, 15 or the output shaft 7 of the gear trains G3, G4, G5 for the third speed, the fourth speed and the fifth speed. Synchronizers 33 and 34 are provided.

  Specifically, on the countershaft 8, a reverse synchronizer 31 used to form a reverse gear is provided adjacent to, for example, the vehicle body front side of the driven gear 20 of the reverse gear train GR. A 1-2 speed synchronizer 32 that is also used for generating a speed is provided between the driven gears 21 and 22 of the first speed gear train G1 and the second speed gear train G2. Further, on the input shaft 6, a 3-4 speed synchronizer 33, which is used for both the 3rd speed and the 4th speed, is provided between the drive gears 13 and 14 of the 3rd speed gear train G3 and the 4th speed gear train G4. Is provided between the drive gear 15 of the fifth-speed gear train G5 and the fitting portion 7a of the output shaft 7. ing.

  When the sync sleeve 31a is slid forward of the vehicle body by the operation of the reverse synchronization device 31, the rotation of the driven gear 20 and the counter shaft 8 is synchronized to form the reverse gear. Further, by the operation of the 1-2 speed synchronizer 32, the first speed is formed when the sync sleeve 32a is slid to the front side of the vehicle body, and the second speed is formed when it is slid to the rear side of the vehicle body.

  Similarly, when the sync sleeve 33a of the 3-4 speed synchronizer 33 is slid to the front side of the vehicle body, the 3rd speed is formed, and when it is slid to the rear side of the vehicle body, the 4th speed is formed. Further, when the synchro sleeve 34a of the 5-6 speed synchronizer 34 is slid to the front side of the vehicle body, the 5th speed is formed. Thus, the sixth gear, which is a directly connected gear, is formed.

  When a gear stage other than the sixth speed is formed, power is transmitted from the input shaft 6 to the countershaft 8 via the gear trains G1, G2, G3, G4, G5, GR in the power transmission state. Power is transmitted from the counter shaft 8 to the output shaft 7 via the reduction gear train G0. When the sixth speed is established, power is directly transmitted from the input shaft 6 to the output shaft 7 without going through the counter shaft 8.

[Shift pattern]
As shown in the plan view of FIG. 2, the selection operation and the shift operation of the change lever 200 are performed according to a predetermined shift pattern 202.

  The shift pattern 202 shown in FIG. 2 includes a select lane LS extending in the vehicle body width direction, a reverse shift lane LR extending from the select lane LS to the vehicle body front side in the vehicle longitudinal direction, and from the select lane LS to the vehicle body front side and vehicle body rear side. A 1-2 speed shift lane L12, a 3-4 speed shift lane L34, and a 5-6 speed shift lane L56 extending in the longitudinal direction of the vehicle body are provided. The neutral position in the shift pattern 202 is a position where the select lane LS and the 3-4 speed shift lane L34 intersect.

  According to this shift pattern 202, the select operation of the change lever 200 is performed in the direction toward the right or left side in the vehicle body width direction along the select lane LS, and the shift operation is performed in the corresponding shift lanes LR, L12, L34, L56. Along the direction toward the vehicle body front side or vehicle body rear side. Specifically, the shift operation direction to reverse, first speed, third speed and fifth speed is a direction toward the front side of the vehicle body, and the shift operation direction to second speed, fourth speed and sixth speed is toward the rear side of the vehicle body. Direction.

[Speed change operation mechanism]
Hereinafter, the shift operation mechanism 40 will be described.

  As shown in FIG. 3, the change lever 200 of the speed change operation mechanism 40 includes a large sphere portion 200a that is rotatably supported by the vehicle body, and an upper lever portion 200b that extends upward from the large sphere portion 200a. A knob 200c that is gripped by the driver is provided at the upper end of 200b.

  Further, the change lever 200 includes a lower lever portion 200d that extends downward from the large sphere portion 200a. The change lever 200 swings about the center of the large sphere portion 200a as a fulcrum by a select operation or a shift operation. When the change lever 200 swings, the lower end portion 200e of the lower lever portion 200d is always opposite to the knob 200c. Move to the side.

  The transmission operation mechanism 40 includes first and second control rods 41 and 42 housed in the transmission case 1 together with the transmission mechanism 4 (see FIG. 1). The first and second control rods 41 and 42 are arranged in parallel to each other so as to extend in the longitudinal direction of the vehicle body, and are in communication with each other via a reversing mechanism 50 described later.

  The first and second control rods 41 and 42 rotate around their respective axis centers in conjunction with the select operation of the change lever 200 and move in the respective axial directions in conjunction with the shift operation. Have been contacted. Specifically, the rear end portion of the first control rod 41 is connected to the change lever 200 via the change rod 190.

  The change rod 190 is disposed so as to extend in the longitudinal direction of the vehicle body, and is engaged with the lower end portion 200e of the change lever 200 at the rear end portion thereof. Accordingly, when the selection operation is performed so that the knob 200c of the change lever 200 is tilted to the right or left in the vehicle body width direction, the rear end of the change rod 190 together with the lower end 200e of the change lever 200 swings to the left or right. When the shift rod 190 is rotated about its axis and the shift operation is performed so that the knob 200c of the change lever 200 is tilted forward or backward, the change rod 190 The lever 200 is moved to the front or rear side of the vehicle body together with the lower end portion 200e of the lever 200.

  The first control rod 41 is disposed so as to protrude rearward from the transmission case 1, and the rear end portion of the first control rod 41 is connected to the front end portion of the change rod 190 via a joint 192. Has been.

  FIG. 4 is a development view showing the shift operation mechanism 40 in the neutral state. As shown in FIG. 4, the joint 192 is, for example, a cross joint having a pair of support shafts 195 and 196 extending in a direction perpendicular to each other. The pair of support shafts 195 and 196 are supported by the holder 194. One support shaft 195 is disposed along a direction perpendicular to the change rod 190 and passes through the front end 190 a of the change rod 190. The other support shaft 196 is disposed along a direction perpendicular to the first control rod 41 and passes through the rear end portion 41 a of the first control rod 41.

  The front end 190a of the change rod 190 is rotatable around the axis of one support shaft 195, and the rear end 41a of the first control rod 41 is rotatable around the axis of the other support shaft 196. ing. The connection via the joint 192 allows the rotation and translational motion from the change rod 190 to the first control rod 41 to be transmitted while allowing the change rod 190 to tilt with respect to the axial direction D1 of the first control rod 41. It is possible.

  Accordingly, the first control rod 41 rotates in the same direction in conjunction with the rotation of the change rod 190 during the select operation, and in the same direction in conjunction with the movement of the change rod 190 in the longitudinal direction of the vehicle body during the shift operation. Move in the axial direction. The movement of the first control rod 41 during the selection operation and the shift operation is transmitted to the second control rod 42 via the reversing mechanism 50 described later.

  A transmission case 1 that accommodates most of the first control rod 41 and the entire second control rod 42 includes a first case member 2 that accommodates the transmission mechanism 4 (see FIG. 1), and a clutch 199 (see FIG. 1). The 2nd case member 3 which accommodates. The first case member 2 opens to the front side of the vehicle body. The second case member 3 is disposed adjacent to the front side of the vehicle body of the first case member 2 and closes the front end opening of the first case member 2. The first and second case members 2 and 3 are coupled to each other by, for example, bolts.

  The first control rod 41 is disposed so as to penetrate the first case member 2 of the transmission case 1 and protrude toward the rear side of the vehicle body. The first control rod 41 is rotatably and slidably supported by the first case member 2 on the rear end side via, for example, a metal bush 43, and on the front end side, for example, via a metal bush 44. The second case member 3 is supported rotatably and slidable. A portion of the first case member 2 through which the first control rod 41 passes is sealed by a seal member 49.

  The second control rod 42 is longer than the first control rod 41. The second control rod 42 is rotatably and slidably supported by the first case member 2 on the rear end side via, for example, a metal bush 45, and on the front end side, for example, via a metal bush 46. The second case member 3 is supported rotatably and slidable.

  The first and second control rods 41 and 42 are connected to each other via a reversing mechanism 50 that moves the second control rod 42 in the axial direction D3 to the opposite side of the movement direction of the first control rod 41 during a shift operation. ing.

  The reversing mechanism 50 includes a sleeve member 70 fitted to the first control rod 41, a support shaft 58 attached to the sleeve member 70, and a reversing lever 51 supported by the support shaft 58. The reversing lever 51 is engaged with a first lever end 60 provided on the first control rod 41 on one end side, and is engaged with a second lever end 80 provided on the second control rod 42 on the other end side. Has been.

  As shown in FIGS. 4 to 7, the first lever end 60 is a cylindrical member fitted to the first control rod 41, and is fixed to the first control rod 41 by, for example, a spring pin 69. Thereby, the first lever end 60 always rotates and moves in the axial direction together with the first control rod 41. The first lever end 60 is fixed to, for example, the vicinity of the end portion of the first control rod 41 on the front side of the vehicle body.

  The first lever end 60 includes a pair of protrusions 61 and 62 protruding outward in the radial direction. These protrusions 61 and 62 are formed to extend in the axial direction D1.

  Further, an engagement groove 63 extending in a tangential direction perpendicular to the axial direction D1 is provided on the outer peripheral surface of the first lever end 60. The engaging groove 63 is formed so as to traverse one of the protrusions 61, whereby the protrusion 61 has a first protrusion 61a and a second protrusion that are arranged at intervals in the axial direction D1. It is divided into 61b. The first protrusion 61a and the other protrusion 62 of one protrusion 61 are provided with a through hole 66 in which the spring pin 69 is attached so as to penetrate in the radial direction.

  The first and second protrusions 61 a and 61 b include side portions 64 and 65 that constitute the side walls of the engagement groove 63. These side surface parts 64 and 65 are comprised by the surface orthogonal to the axial direction D1, and are mutually opposing.

  The engaging groove 63 is a first engaging portion with which one end side of the reversing lever 51 is engaged. The engaging groove 63 is engaged with the reversing lever 51 so as to sandwich one end portion of the reversing lever 51 from both sides in the axial direction D1 by the pair of side surface portions 64 and 65.

  The sleeve member 70 includes a peripheral wall portion 72 that surrounds the first control rod 41 from the outside in the radial direction via the first lever end 60. The peripheral wall 72 has a cylindrical inner peripheral surface that matches the shape of the outer peripheral surface of the first lever end 60.

  On the inner peripheral surface of the peripheral wall portion 72, groove portions 73 and 74 with which the protrusions 61 and 62 of the first lever end 60 are engaged are provided so as to extend in the axial direction D1. The groove portions 73 and 74 are formed from one end to the other end of the peripheral wall portion 72 in the axial direction D1, and are open to both sides in the axial direction D1. Thereby, the protrusions 61 and 62 of the first lever end 60 engaged with the groove portions 73 and 74 are movable along the groove portions 73 and 74 in the axial direction D1.

  The peripheral wall portion 72 is fitted to the outside of the first lever end 60 so that the protrusions 61 and 62 of the first lever end 60 are engaged with the groove portions 73 and 74, respectively. As a result, the sleeve member 70 is restricted in relative rotation with respect to the first control rod 41 and the first lever end 60, but is relatively movable in the axial direction D1.

  The peripheral wall 72 is formed with a notch 75 at one location in the circumferential direction. The notch 75 is formed to extend in the axial direction D1. The notch 75 is formed from one end to the other end of the peripheral wall 72 in the axial direction D1, and is open on both sides in the axial direction D1. However, the notch 75 may be formed in a slit shape in which one end side in the axial direction D1 is closed, or may be formed in a slot shape in which both sides in the axial direction D1 are closed.

  The sleeve member 70 includes a pair of plate portions 76 and 77 that face each other. The plate portions 76 and 77 are provided integrally with the peripheral wall portion 72 so as to extend downward from the peripheral wall portion 72. The pair of plate portions 76 and 77 are arranged in parallel to each other, and one plate portion 76 is arranged in the vicinity of the cutout portion 75 of the peripheral wall portion 72. The plate portions 76 and 77 are provided with through holes 78 and 79 through which the support shaft 58 is inserted.

  As shown in FIG. 7, the peripheral wall portion 72 of the sleeve member 70 is engaged with a step portion 2 a provided on the inner peripheral surface of the first case member 2 on one end side in the axial direction D <b> 1. On the end side, the second case member 3 is pressed against the mating surface 3 a with the first case member 2. By such engagement between the peripheral wall portion 72 and the transmission case 1, the movement of the sleeve member 70 to one side in the axial direction D1 is restricted by the first case member 2, and the movement to the other side in the axial direction D1. Is regulated by the second case member 3.

  Therefore, the sleeve member 70 is rotated in conjunction with the rotation of the first control rod 41 during the select operation, but the first control is controlled by the transmission case 1 when the shift operation is performed. It is not interlocked with respect to the axial movement of the rod 41.

  The mating surface 3 a of the second case member 3 is provided with a recess 3 b in a portion facing the first lever end 60. Therefore, when the first control rod 41 and the first lever end 60 move in the axial direction D1 to the right in FIGS. 4 and 7, the first lever end 60 is accommodated in the recess 3b, so that the second case member 3 is avoided.

  As shown in FIGS. 6 and 7, the support shaft 58 is attached to the sleeve member 70 through a pair of plate portions 76 and 77. The support shaft 58 is attached to the sleeve member 70 so as not to be relatively movable. The support shaft 58 is disposed along a direction perpendicular to the first control rod 41, and this positional relationship is always maintained constant regardless of the rotational position of the sleeve member 70. The support shaft 58 is prevented from coming off by, for example, a head 58a provided at one end thereof and a snap ring 59 attached to the other end.

  The reversing lever 51 includes a cylindrical portion 52 fitted to the support shaft 58, a first lever portion 53 extending from the cylindrical portion 52 toward the first lever end 60, and a second lever end 80 from the cylindrical portion 52. And a second lever portion 55 extending toward the front.

  The cylindrical portion 52 is rotatably supported by the support shaft 58, so that the reversing lever 51 can swing around the axis of the support shaft 58. However, the cylindrical portion 52 may be provided so as to be fixed to the support shaft 58 and rotated together with the support shaft 58. The cylindrical portion 52 is sandwiched between the pair of plate portions 76 and 77 of the sleeve member 70, thereby restricting the movement of the support shaft 58 in the axial direction.

  The first lever portion 53 is disposed in parallel with the plate portions 76 and 77. In the axial direction of the cylindrical portion 52, the first lever portion 53 is provided at a position shifted from the first control rod 41. The first lever portion 53 is disposed in opposition to the one plate portion 76 in the vicinity thereof.

  The first lever portion 53 passes through the peripheral wall portion 72 through the cutout portion 75 of the peripheral wall portion 72 of the sleeve member 70. The distal end portion of the first lever portion 53 is an engagement portion 54 that is engaged with the engagement groove 63 of the first lever end 60 inside the peripheral wall portion 72. The engaging portion 54 is formed in a disk shape, for example. The engaging portion 54 is always disposed at right angles to the side surface portions 64 and 65 of the engaging groove 63 regardless of the swing angle of the reversing lever 51.

  The second lever portion 55 is provided so as to extend from the central portion in the axial direction of the cylindrical portion 52 to the outer side in the radial direction on the opposite side to the first lever portion 53. As shown in FIG. 7, the first lever portion 53 and the second lever portion 55 are arranged on the same straight line when viewed from the axial direction of the cylindrical portion 52. A spherical portion 56 that is engaged with the second lever end 80 is provided at the distal end portion of the second lever portion 55.

  As shown in FIGS. 6 to 8, the second lever end 80 is fitted to the second control rod 42 and is fixed to the second control rod 42 by, for example, a spring pin 81.

  The second lever end 80 includes a lever portion 82 that extends radially outward of the second control rod 42. The lever portion 82 has a rectangular cross section, for example. A hole 83 as a second engaging portion that is engaged with the reversing lever 51 is provided on the end face of the tip of the lever portion 82. The hole 83 is, for example, a cylindrical bottomed hole. The spherical portion 56 of the reversing lever 51 is fitted into the hole 83, whereby the second lever end 80 and the second lever portion 55 of the reversing lever 51 are engaged.

  As shown in FIGS. 7 and 8, the second lever end 80 is integrally provided with a guide plate 84 disposed to face the outer peripheral surface of the second control rod 42. The guide plate 84 is formed with guide holes 85 formed corresponding to the shift pattern 202 (see FIG. 2). A guide pin 86 fixed to the first case member 2 of the transmission case 1 is inserted into the guide hole 85, and the guide pin 86 is guided along the guide hole 85 during a selection operation and a shift operation. The

  As shown in FIG. 4, the second control rod 42 includes a first shift finger set (hereinafter referred to as “first set”) 91, a second shift finger set (hereinafter referred to as “second set”) 92, and Are provided at intervals in the axial direction D3. The first set 91 and the second set 92 are arranged in this order from the vehicle body rear side, and both are arranged on the vehicle body rear side from the second lever end 80.

  The configuration of the first set 91 and the second set 92 will be described with reference to FIGS. 9 and 10. The first set 91 and the second set 92 have exactly the same configuration except that the positions in the axial direction provided on the second control rod 42 are different.

  As shown in FIGS. 9 and 10, each of the first set 91 and the second set 92 includes one shift finger 93 and one interlock regulating member 100 engaged with the shift finger 93.

  The shift finger 93 is a cylindrical member that is fitted to the second control rod 42. The shift finger 93 is provided with a through hole 97, and a spring pin 98 (see FIGS. 11 and 12) inserted into the through hole 97 passes through the second control rod 42, so that the spring pin 98 is interposed therebetween. Thus, the shift finger 93 is fixed to the second control rod 42. As a result, the shift finger 93 rotates together with the second control rod 42 during the select operation, and moves in the axial direction D3 together with the second control rod 42 during the shift operation.

  The shift finger 93 includes a lever portion 94 that extends radially outward, and a pair of protrusions 95 and 96 that protrude radially outward at a circumferential position different from the lever portion 94. The pair of projecting portions 95 and 96 project toward the opposite sides. Each protrusion 95, 96 is provided over the entire length of the shift finger 93 in the axial direction D3. In the axial direction D <b> 3, the length of the lever portion 94 is shorter than the entire length of the shift finger 93, and the lever portion 94 is provided in the center portion of the shift finger 93 in the axial direction D <b> 3.

  The interlock regulating member 100 has a C-shaped overall shape as viewed from the axial direction D3 by providing a notch 105 at one place in the circumferential direction. The interlock regulating member 100 is mounted on the radially outer side of the shift finger 93 so as to surround the shift finger 93.

  The interlock restricting member 100 includes a semi-cylindrical main body portion 101 having substantially the same axial direction D3 length as the shift finger 93, and first and second restricting portions 103, 104 that are shorter in the axial direction D3 than the main body portion 101. And. The first restricting portion 103 is provided to extend from one end portion of the main body portion 101 in the circumferential direction D4 (see FIG. 4), and the second restricting portion 104 is extended from the other end portion of the main body portion 101 in the circumferential direction D4. Is provided. The distal end of the first restricting portion 103 and the distal end of the second restricting portion 104 in the circumferential direction D4 are arranged to face each other with the notch 105 interposed therebetween.

  The main body 101 is provided with an engagement hole 102 that is engaged with positioning pins 87 and 88 (see FIGS. 4, 11, and 12) fixed to the first case member 2 of the transmission case 1. . The movement of the interlock regulating member 100 in the axial direction D3 is regulated by the positioning pins 87 and 88 engaged with the engagement holes 102. The engagement hole 102 is provided through the main body 101 in the thickness direction. Further, the engagement hole 102 is a long hole extending in the circumferential direction D4, whereby the circumferential movement of the interlock regulating member 100 with respect to the positioning pins 87 and 88 is allowed within a predetermined range.

  The inner peripheral surfaces of the first restricting portion 103 and the second restricting portion 104 are disposed on the same cylindrical surface as the inner peripheral surface of the main body portion 101. In a state where the interlock regulating member 100 is fitted to the outside of the shift finger 93, the inner peripheral surfaces of the main body portion 101, the first restricting portion 103, and the second restricting portion 104 are arranged along the outer peripheral surface of the shift finger 93. As a result, rattling of the interlock regulating member 100 in the radial direction with respect to the shift finger 93 is suppressed. In this fitted state, the lever portion 94 of the shift finger 93 is disposed in the notch 105 between the first and second restricting portions 103 and 104, so that interference with the interlock restricting member 100 is avoided.

  The interlock restriction member 100 includes a pair of first guide parts 106 and 107 extending from the first restriction part 103 on both sides in the axial direction D3, and a pair of second guide parts 108 and 107 extending from the second restriction part 104 on both sides in the axial direction D3. 109. The first guide portions 106 and 107 and the second guide portions 108 and 109 are formed in a fan shape when viewed from the axial direction D3, and have the same inner diameter as the first restricting portion 103 and the second restricting portion 104, and the outer diameter. Is formed small. The inner peripheral surfaces of the first guide portions 106 and 107 and the second guide portions 108 and 109 are arranged on the same cylindrical surface as the inner peripheral surfaces of the main body portion 101, the first restricting portion 103 and the second restricting portion 104. , And can be disposed along the outer peripheral surface of the shift finger 93.

  On the inner peripheral surface of the interlock restricting member 100, a first engaging recess 110 straddling the main body 101 and the first restricting portion 103 and a second straddling the main body 101 and the second restricting portion 104 are provided. An engaging recess 111 is provided. The first engagement recess 110 and the second engagement recess 111 are each formed in a groove shape extending in the axial direction D3.

  In a state where the interlock regulating member 100 is fitted to the outside of the shift finger 93, the protrusions 95 and 96 of the shift finger 93 are engaged with the first and second engaging recesses 110 and 111 of the interlock regulating member 100. Is done. As a result, the circumferential movement of the interlock restricting member 100 with respect to the shift finger 93 is restricted. Therefore, when the shift finger 93 rotates in conjunction with the select operation, the interlock restricting member 100 also always rotates integrally. .

  At this time, the positioning pins 87 and 88 engaged with the engagement holes 102 of the interlock regulating member 100 are allowed to move in the circumferential direction within the engagement holes 102 formed long in the circumferential direction D4. The rotation of the interlock regulating member 100 is not restricted by the pins 87 and 88.

  Further, when the shift finger 93 and the interlock restricting member 100 are in the fitted state, the protrusions 95 and 96 of the shift finger 93 are pivoted along the first and second engaging recesses 110 and 111 of the interlock restricting member 100. It is movable in the direction D3. Further, in this fitted state, the lever portion 94 of the shift finger 93 is movable in the axial direction D3 along the notch 105 between the first and second restricting portions 103 and 104. Therefore, the movement of the shift finger 93 in the axial direction D3 is not restricted by the interlock restricting member 100 whose movement in the axial direction D3 is restricted by the positioning pins 87 and 88.

  As shown in FIG. 4, the speed change operation mechanism 40 further includes a shift rod 90 arranged in parallel to the second control rod 42 in the transmission case 1. The shift rod 90 is disposed obliquely below the second control rod 42 as viewed from the axial direction D3 (see FIG. 12). One end of the shift rod 90 is connected to the first case member 2 of the transmission case 1 via a metal bush 47, for example, and the other end of the shift rod 90 is connected to the transmission case via a metal bush 48, for example. Each of the second case members 3 is slidably supported.

  Further, the shift operation mechanism 40 is selectively engaged with the shift finger 93 by the select operation and moved in the axial direction D3 by the shift operation, thereby corresponding synchronizing devices 31, 32, 33, 34 (see FIG. 1). A plurality of shift forks 132, 144, 154, 164 are provided. Specifically, the reverse shift fork 132 for operating the reverse synchronization device 31 and the 1-2 speed shift fork 144 for operating the 1-2 speed synchronization device 32 and the 3-4 speed synchronization device 33 are operated. A 3-4 speed shift fork 154 and a 5-6 speed shift fork 164 for operating the 5-6 speed synchronizer 34 are provided.

  The reverse shift fork 132 is engaged with the synchro sleeve 31a (see FIG. 1) of the reverse synchronizer 31 provided on the countershaft 8, and the 1-2 speed shift fork 144 is also the countershaft. 8 is engaged with a synchro sleeve 32a (see FIG. 1) of the synchronizer 32 for 1-2 speed provided in FIG.

  On the other hand, the shift fork 154 for 3-4 speed is engaged with the synchro sleeve 33a (see FIG. 1) of the synchronizer 33 for 3-4 speed provided on the main shaft 5, and is for 5-6 speed. The shift fork 164 is engaged with a sync sleeve 34 a (see FIG. 1) of the 5-6 speed synchronizer 34 provided on the main shaft 5.

  Any of the shift forks 132, 144, 154, 164 operates the corresponding synchronizers 31, 32, 33, 34 by moving the engaged sync sleeves 31a, 32a, 33a, 34a in the axial direction D3. .

  The reverse shift fork 132, the 1-2 speed shift fork 144, the 3-4 speed shift fork 154, and the 5-6 speed shift fork 164 are arranged in this order from the rear side of the vehicle body in the axial direction D3. ing.

  The shift fork 132 for reverse and the shift fork for 1-2 speed 144 are supported by the shift rod 90, and the shift fork 154 for 3-4 speed and the shift fork 164 for 5-6 speed are connected to the second control rod 42. It is supported loosely.

  The reverse shift fork 132 is provided integrally with a cylindrical shift end 130 fixed to the shift rod 90 by, for example, a spring pin 131. The shift end 130 is disposed in the vicinity of the end of the shift rod 90 on the front side of the vehicle body. The reverse shift fork 132 is fixed to the shift rod 90 via the shift end 130, so that it moves together with the shift rod 90 in the axial direction D3.

  A fork gate 123 (see FIG. 12) corresponding to the reverse shift fork 132 is disposed around the second set 92 on the second control rod 42. The other end portion of the gate arm 122 having the fork gate 123 at one end portion is integrally connected to a cylindrical portion 120 fixed to the shift rod 90 by a spring pin 121, for example. As a result, the gate arm 122 is indirectly connected to the shift fork 132 via the shift rod 90.

  The 1-2 speed shift fork 144 is provided integrally with a cylindrical shift end 140 loosely fitted to the shift rod 90. The shift end 140 is slidable on the shift rod 90 in an axial range between the reverse tubular portion 120 and the shift end 130. The first-second shift fork 144 is loosely supported by the shift rod 90 via the shift end 140, so that the shift fork 144 is moved integrally with the shift end 140 in the axial direction D3. Yes.

  The fork gate 143 corresponding to the 1-2 speed shift fork 144 is disposed around the second set 92 on the second control rod 42. The other end of the gate arm 142 having the fork gate 143 at one end is connected to the shift end 140 integrally. Thereby, the gate arm 142 is directly connected to the shift fork 144 without passing through the shift rod 90.

  The 3-4 speed shift fork 154 is provided integrally with a cylindrical shift end 150 that is loosely fitted to the second control rod 42. The shift end 150 is slidable on the second control rod 42 in the axial range between the shift finger 93 of the first set 91 and the shift finger 93 of the second set 92. The 3-4 speed shift fork 154 is loosely supported by the second control rod 42 via the shift end 150, so that it can move in the axial direction D3 relative to the second control rod 42. ing.

  A fork gate 153 (see FIG. 11) corresponding to the 3-4 speed shift fork 154 is disposed around the first set 91 on the second control rod 42. The other end of the gate arm 152 having the fork gate 153 at one end is connected to the shift end 150 integrally. As a result, the gate arm 152 is in direct communication with the shift fork 154.

  The 5-6 speed shift fork 164 is provided integrally with a cylindrical shift end 160 loosely fitted to the second control rod 42. The shift end 160 is slidable on the second control rod 42 on the rear side of the vehicle body with respect to the shift finger 93 of the first set 91. The 5-6 speed shift fork 164 is loosely supported by the second control rod 42 via the shift end 160 so that it can move in the axial direction D3 relative to the second control rod 42. ing.

  A fork gate 163 corresponding to the 5-6 speed shift fork 164 is disposed around the first set 91 on the second control rod 42. The other end of the gate arm 162 having the fork gate 163 at one end is connected to the shift end 160 integrally. Thereby, the gate arm 162 is directly connected to the shift fork 164.

  The engagement of the fork gates 123, 143, 153, and 163 with respect to the shift finger 93 and the interlock regulating member 100 is divided into the first set 91 and the second set 92. Specifically, as shown in FIG. 11, fork gates 153 and 163 for 3-4 speed and 5-6 speed are assigned to the first set 91, and as shown in FIG. Second-speed fork gates 123 and 143 are assigned to the second set 92.

  In the neutral state shown in FIGS. 11 and 12, the circumferential direction D4 position of the lever portion 94 of the shift finger 93 is the same in both the first set 91 and the second set 92, and the fork gates 123, 143, 153, 163 are all arranged at different circumferential direction D4 positions. Specifically, fork gates 123, 143, 153, and 163 for reverse, for 1-2 speed, for 3-4 speed, and for 5-6 speed as viewed from the rear side of the vehicle body in the axial direction D3 are counterclockwise. They are arranged in this order in the direction.

  In the neutral state, the 3-4 speed fork gate 153 is engaged with the lever portion 94 of the shift finger 93 of the first set 91 (see FIG. 11), and is more circumferential than the 3-4 speed fork gate 153. The fork gates 123 and 143 for reverse and 1-2 speed arranged on one side of D4 are engaged with the second restriction portion 104 of the interlock restriction member 100 of the second set 92 (see FIG. 12). The 5-6 speed fork gate 163 disposed on the other side in the circumferential direction D4 with respect to the 3-4 speed fork gate 153 is engaged with the first restriction portion 103 of the interlock restriction member 100 of the first set 91. (See FIG. 11).

  The shift operation mechanism 40 configured as described above performs the following operations in conjunction with the selection operation and shift operation of the change lever 200 (see FIG. 3).

  First, the operation of the reversing mechanism 50 of the speed change operation mechanism 40 during the select operation will be described with reference to FIG. 6 showing the neutral state and FIG. 13 showing the 5-6 speed select state.

  As described above, the first lever end 60 is fixed to the first control rod 41, and the sleeve member 70 is restricted from rotating relative to the first lever end 60. The relative positions of the support shaft 58 and the cylindrical portion 52 of the reversing lever 51 with respect to the sleeve member 70 are constant.

  Therefore, when the first control rod 41 is rotated in conjunction with the select operation, the first lever end 60, the sleeve member 70, the support shaft 58, and the reverse lever 51 are rotated around the axis of the first control rod 41. It rotates integrally with the rod 41 in the direction D2. For example, as shown in FIG. 13, when the 5-6 speed select operation is performed, the first control rod 41, the first lever end 60, the sleeve member 70, the support shaft 58, and the reverse lever 51 are connected to the first control rod 41. Around the shaft center of the vehicle body and integrally rotate in the clockwise direction when viewed from the rear side of the vehicle body.

  When the reversing lever 51 rotates about the axis of the first control rod 41 in this way, at the engaging portion between the second lever portion 55 and the second lever end 80 of the reversing lever 51, The inner peripheral surface of the hole 83 of the second lever end 80 is pushed into the circumferential direction D4 of the second control rod 42 by the spherical portion 56, whereby the second lever end 80 and the second control rod 42 to which it is fixed are The rod 42 rotates in the opposite direction to the first control rod 41 in the circumferential direction D4 around the axis of the rod 42. For example, when the 5-6 speed selection operation shown in FIG. 13 is performed, the second control rod 42 rotates counterclockwise as viewed from the rear side of the vehicle body.

  As described above, the rotational motion of the first control rod 41 during the selection operation is transmitted to the second control rod 42 via the reversing mechanism 50. Thus, during the selection operation, the second control rod 42 rotates in the direction opposite to the rotation direction of the rod 41 in conjunction with the rotation of the first control rod 41.

  Next, referring to FIG. 11 and FIG. 12 showing the neutral state and FIG. 14 and FIG. 15 showing the 5-6 speed select state, the first and second on the second control rod 42 during the select operation are referred to. The operation of the second set 91, 92 will be described.

  When the second control rod 42 rotates in conjunction with the selection operation as described above, the shift finger 93 and the interlock regulating member 100 of the first and second sets 91 and 92 also rotate together with the second control rod 42. Of the fork gates 123, 143, 153, and 163 arranged as described above, the shift finger 93 of either the first or second set 91 or 92 is connected to the fork gate corresponding to the selection position selected by the selection operation. The lever portion 94 is engaged. At this time, the first or second restricting portion 103 or 104 of the interlock restricting member 100 is engaged with a fork gate other than the one engaged with the shift finger 93.

  For example, in the neutral state shown in FIG. 11, the lever portion 94 of the shift finger 93 is engaged with the 3-4 speed fork gate 153, but in the 5-6 speed select state shown in FIG. -Engaged with the fork gate 163 for 6 speed. In the 5-6 selected state, as shown in FIG. 14, the 3-4 speed fork gate 153 is engaged with the second restricting portion 104 of the interlock restricting member 100 of the first set 91, as shown in FIG. As shown, the reverse and first-second fork gates 123 and 143 are engaged with the second restricting portion 104 of the interlock restricting member 100 of the second set 92.

  Next, the operation of the speed change operation mechanism 40 during the shift operation will be described with reference to FIG. 7 showing the neutral state and FIG. 16 showing the fourth speed shift state.

  As described above, the first lever portion 60 of the reversing lever 51 is engaged with the first lever end 60 on the first control rod 41, so that the first control rod 41 and the first control rod 41 are fixed to the first control rod 41 in conjunction with the shift operation. When the first lever end 60 is moved in the axial direction D1, the engagement portion 54 of the first lever portion 53 is formed by either one of the pair of side surface portions 64, 65 of the engagement groove 63 of the first lever end 60. Is pushed in the axial direction D1. As a result, the reversing lever 51 is swung in the circumferential direction D5 around the axis of the support shaft 58.

  When the reversing lever 51 is swung in this way, the second lever end 80 engaged with the second lever portion 55 of the reversing lever 51 is moved to the inner periphery of the hole 83 by the spherical portion 56 of the second lever portion 55. When the surface is pushed in the axial direction D3 of the second control rod 42, the second lever end 80 and the second control rod 42 to which the second lever end 80 is fixed are moved in the axial direction D3.

  When the reversing lever 51 swings, the spherical portion 56 of the second lever portion 55 moves in the direction opposite to the engaging portion 54 of the first lever portion 53 with respect to the axial direction D3. Therefore, the second control rod 42 moves in the direction opposite to the first control rod 41 during the shift operation. For example, during the 4-speed shift operation shown in FIG. 16, the first control rod 41 moves to the vehicle body front side in the axial direction D1, and the second control rod 42 moves to the vehicle body rear side in the axial direction D3.

  As described above, the translational motion of the first control rod 41 during the shift operation is transmitted to the second control rod 42 via the reversing mechanism 50. Thus, during the shift operation, the second control rod 42 moves in the axial direction D3 toward the opposite side of the movement direction of the rod 41 in conjunction with the movement of the first control rod 41 in the axial direction D1. To do.

  When the second control rod 42 moves in the axial direction D3 in conjunction with the shift operation in this way, the first and second sets 91 and 92 are fixed to the second control rod 42 as shown in FIG. The finger 93 and the fork gate 163 engaged with one shift finger 93 also move in the axial direction D3. For example, at the time of a 4-speed shift operation, the 3-4 speed fork gate 153 engaged with the shift finger 93 of the first set 91 moves in the axial direction D3 toward the rear side of the vehicle body and is integrated with this for the 3-4 speed. As the shift fork 154 also moves in the same direction, the 3-4 speed synchronizer 33 (see FIG. 1) is operated, and the 4th speed gear train G4 enters the power transmission state.

  At this time, the other fork gates 123, 143, and 163 that are not engaged with the shift finger 93 are restricted from moving in the axial direction D <b> 3 by the engagement with the interlock restriction member 100. Is prevented from being actuated, and thereby interlocking of the speed change mechanism 4 is avoided.

  According to the first embodiment described above, the reversing mechanism 50 provided between the first control rod 41 and the second control rod 42 causes the movement direction of the second control rod 42 during the shift operation to be the first. The direction of the control rod 41 is reversed.

  As a result, the corresponding shift forks 132, 144, 154, 164, and synchros are operated at the time of shifting operation to the first speed, the third speed, the fifth speed, and the reverse in which the shift operation to the front side of the vehicle body is performed according to the shift pattern 202 shown in FIG. The sleeves 31a, 32a, 33a, and 34a (see FIG. 1) also move to the front side of the vehicle body, so that the gear trains G1, G3, G5, and GR (see FIG. 1) of a desired shift stage can be set in the power transmission state. it can.

  On the other hand, at the time of shifting operation to the second speed, the fourth speed, and the sixth speed where the shifting operation to the rear side of the vehicle body is performed, the corresponding shift forks 144, 154, 164 and the synchro sleeves 32a, 33a, 34a (see FIG. 1) are By moving to the rear side, the gear trains G2, G4, G6 (see FIG. 1) of a desired gear position can be brought into a power transmission state.

  Therefore, the gear train G0, G1, G2, G3, G4, G5, GR and the synchronizers 31, 32, in the order shown in FIG. The speed change of the speed change mechanism 4 in which 33 and 34 are arranged can be appropriately executed. By configuring the speed change mechanism 4 in this way, the first-speed gear train G1 to which the largest torque is applied can be arranged closer to the bearings 17 and 27 than the second-speed gear train G2, or the direct-coupled gear stage. The fitting portion 7a of the output shaft 7 that is directly connected to the input shaft 6 at the 6th speed is arranged on the rear side of the vehicle body from the gear trains G1, G2, G3, G4, G5, GR of all other speed stages. This provides advantages such as the construction of an output reduction type speed change mechanism 4 in which the sixth frequently used gear is a directly connected shift stage.

  According to the reversing mechanism 50, since the moving direction of all the shift forks 132, 144, 154, 164 can be reversed by the single reversing lever 51, the moving directions of the plurality of shift forks are temporarily reversed. Therefore, compared to the case where a reverse lever is provided for each shift fork, the number of reverse levers and the parts associated therewith can be reduced, and the speed change mechanism 40 can be reduced in weight.

  Further, since the support shaft 58 that supports the reversing lever 51 is attached to the sleeve member 70 that is fitted to the first control rod 41, compared to the case where the support shaft 58 is attached to the transmission case 1 temporarily. It is not necessary to provide the transmission case 1 with an attachment hole or boss for supporting the end of the support shaft 58, and the reversing lever 51 can be supported with a simple configuration.

  Further, the reversing mechanism 50 described above performs a select motion between the first and second control rods 41 and 42 in addition to the function of reversing the moving direction during the shift operation between the first and second control rods 41 and 42. Since the transmission function is also provided, the transmission mechanism dedicated to selection is omitted, so that the number of parts can be reduced, and the configuration of the speed change operation mechanism 40 can be simplified, downsized, and reduced in weight.

  As shown in FIGS. 6 to 8, as a specific configuration for achieving both transmission of the shift motion and transmission of the select motion as described above, the engagement of the reversing lever 51 and the second lever end 80 is the second lever. This is accomplished by fitting the spherical portion 56 of the reversing lever 51 into the hole 83 provided in the end 80. Accordingly, the second lever end 80 and the second control rod 42 can be smoothly pushed into both the axial direction D3 and the circumferential direction D4 by the spherical portion 56 of the reversing lever 51. Accordingly, smooth motion transmission from the first control rod 41 to the second control rod 42 via the reversing mechanism 50 can be realized during both the select operation and the shift operation.

  Further, as shown in FIG. 7, according to the above-described speed change operation mechanism 40, these case members 2, 2 are formed by utilizing the connecting portions of the first and second case members 2, 3 constituting the transmission case 1. 3, the sleeve member 70 can be restricted from moving in the axial direction while firmly supporting the sleeve member 70 from both sides in the axial direction D1. Therefore, it is not necessary to attach a positioning dedicated component to the transmission case 1 or to provide a hole or boss for mounting in the transmission case 1, and the axial movement of the sleeve member 70 is restricted with a simple configuration. it can.

  Furthermore, according to the speed change operation mechanism 40 described above, since the engaging portion 54 on one end side of the reversing lever 51 is engaged with the first lever end 60 inside the peripheral wall portion 72 of the sleeve member 70, the reversing lever 51 is temporarily assumed. As compared with the case where the first lever end 60 is engaged outside the peripheral wall portion 72, the support shaft 58 can be easily placed closer to the first control rod 41. Therefore, the second control rod 42 can be easily placed close to the first control rod 41, and thus the speed change operation mechanism 40 can be easily formed compactly.

[Second Embodiment]
A speed change operation mechanism 240 according to the second embodiment will be described with reference to FIGS. 17 and 18. In addition, about the component similar to 1st Embodiment, while attaching | subjecting the same code | symbol in FIG.17 and FIG.18, the description is abbreviate | omitted.

  As shown in FIGS. 17 and 18, in the speed change operation mechanism 240 according to the second embodiment, the engagement of the peripheral wall portion 72 of the sleeve member 70 that extends in the direction perpendicular to the axial direction D <b> 1 is the portion facing the transmission case 1. A mating groove 250 is provided. The engagement groove 250 is open toward the transmission case 1, and a positioning pin 260 fixed to the transmission case 1 is engaged with the engagement groove 250. The engagement of the engagement groove 250 and the positioning pin 260 restricts the movement of the sleeve member 70 in the axial direction D1.

  As described above, in the second embodiment, since the sleeve member 70 is positioned in the axial direction D1 by the positioning pin 260 attached to the transmission case 1, the coupling portion between the case members constituting the transmission case 1 is used. The sleeve member 70 can be arranged and positioned not only at the position but also at an arbitrary position.

  The other configuration of the sleeve member 70 is the same as that of the first embodiment, and the reversing mechanism 50 performs the same operation as that of the first embodiment during the selection operation and the shift operation. Therefore, also in 2nd Embodiment, the effect similar to 1st Embodiment can be acquired.

[Third Embodiment]
A speed change operating mechanism 340 according to the third embodiment will be described with reference to FIGS. 19 and 20. In addition, about the component similar to 1st Embodiment, while attaching | subjecting the same code | symbol in FIG.17 and FIG.18, the description is abbreviate | omitted.

  As shown in FIGS. 19 and 20, in the speed change operation mechanism 340 according to the third embodiment, a part of the configuration of the reversing mechanism 350 is different from that of the first embodiment.

  Also in the third embodiment, the reversing mechanism 350 includes a first lever end 360 fixed to the first control rod 41, a sleeve member 370 fitted to the first control rod 41 via the first lever end 360, and a sleeve. A support shaft 58 supported by the member 370, a reversing lever 51 supported by the support shaft 58 so as to be rotatable about the axis of the support shaft 58, and a second lever end 80 fixed to the second control rod 42 are provided. The reversing lever 51 is engaged with the first lever end 360 on one end side and is engaged with the second lever end 80 on the other end side.

  In 3rd Embodiment, the structure regarding the engagement with the inversion lever 51 and the 1st lever end 360 differs from 1st Embodiment. Also in the third embodiment, the first lever end 360 includes a pair of protrusions 361 and 362 extending in the axial direction D1, but the engagement groove 63 (see FIGS. 5 to 7) as in the first embodiment. ), And none of the protrusions 361 and 362 is continuously formed in the axial direction D1 without being divided by the engaging groove.

  The first lever end 360 includes a pair of projecting portions 363 and 364 that project toward the second control rod 42 instead of the engagement groove 63 described above. Each protrusion part 363,364 is comprised by the plate part arrange | positioned at right angles to the axial direction D1, and is mutually opposingly arranged in the axial direction D1 at intervals.

  The sleeve member 370 basically has the same configuration as that of the sleeve member 70 of the first embodiment, but is provided for inserting the first lever portion 53 of the reversing lever 51 in the sleeve member 70 of the first embodiment. Instead of the notch 75 (see FIGS. 5 to 7), a notch 375 for inserting the pair of protrusions 363 and 364 of the first lever end 360 is provided. The notch 375 is formed over the entire length of the peripheral wall 72 of the sleeve member 370 so as to extend in the axial direction D1, but is a slit shape in which one end side in the axial direction D1 is closed, or a slot in which both end sides are closed. It may be formed in a shape.

  In the third embodiment, the reversing lever 51 and the first lever are disposed between the pair of protrusions 363 and 364 so that the engaging portion 54 of the reversing lever 51 is sandwiched from both sides in the axial direction D1. The end 360 is engaged. By such engagement, when the first control rod 41 and the first lever end 360 are moved in the axial direction D1 in conjunction with the shift operation, the engaging portion 54 of the reversing lever 51 is one of the first lever end 360. The reverse lever 51 rotates in the circumferential direction D5 around the axis of the support shaft 58 in the same manner as in the first embodiment by being pushed into one side in the axial direction D1 by the protrusions 363 and 364.

  Thereby, transmission of the shift motion is performed between the first and second control rods 41 and 42 so that the movement direction of the second control rod 42 is reversed with respect to the movement direction of the first control rod 41. Further, during the selection operation, as in the first embodiment, the first lever end 360, the sleeve member 370, the support shaft 58, and the reversing lever 51 swing together with the first control rod 41 in the circumferential direction D2 around the axis. As a result of the movement, the select movement is transmitted between the first and second control rods 41 and 42 so that the second control rod 42 is rotated by the reversing lever 51. Therefore, also in 3rd Embodiment, the effect similar to 1st Embodiment can be acquired.

[Fourth Embodiment]
A speed change operation mechanism 440 according to the fourth embodiment will be described with reference to FIGS. In addition, about the component similar to 1st Embodiment, while attaching | subjecting the same code | symbol in FIGS. 21-27, the description is abbreviate | omitted.

  As shown in FIG. 21, in the speed change mechanism 440 according to the fourth embodiment, a part of the configuration of the reversing mechanism 450 is different from that of the first embodiment.

  Also in the fourth embodiment, the reversing mechanism 450 includes the first lever end 460 fixed to the first control rod 41, the sleeve member 470 fitted to the first control rod 41, and the support shaft supported by the sleeve member 470. 58, a reversing lever 51 supported by the support shaft 58 so as to be rotatable around the axis of the support shaft 58, and a second lever end 80 fixed to the second control rod 42. The one end is engaged with the first lever end 460 and the other end is engaged with the second lever end 80. In the fourth embodiment, the configurations of the first lever end 460 and the sleeve member 470 are different from those of the first embodiment.

  As shown in FIGS. 21 and 22, the first lever end 460 is a cylindrical member fitted to the first control rod 41. The first lever end 460 is provided with a through hole 466 that penetrates the first lever end 460 in the radial direction. The through hole 466 is provided in the vicinity of the rear end of the first lever end 460 in the axial direction D1. The first lever end 460 is fixed to the first control rod 41 by a spring pin 469 mounted in the through hole 466. Accordingly, the first lever end 460 always rotates and moves in the axial direction together with the first control rod 41. The first lever end 460 is fixed, for example, in the vicinity of the front end portion of the first control rod 41 on the vehicle body side.

  A lever portion 461 as a protrusion is provided on the outer peripheral surface of the first lever end 460. The lever portion 461 extends from the outer peripheral surface of the first lever end 460 along the tangential direction. The lever portion 461 is provided near the rear end of the first lever end 460 in the axial direction D1.

  Further, an engagement groove 463 extending in a tangential direction perpendicular to the axial direction D1 is provided on the outer peripheral surface of the first lever end 460. The engagement groove 463 is provided offset from the center of the first lever end 460 in the axial direction D1 toward the front side of the vehicle body. The engaging groove 463 is formed so as to extend in parallel with the length direction of the lever portion 461. The engagement groove 463 includes a pair of side surface portions 464 and 465 that are opposed to each other and are disposed at right angles to the axial direction D1.

  The engagement groove 463 is a first engagement portion with which one end side of the reversing lever 51 is engaged. The engaging groove 463 is engaged with the reversing lever 51 so as to sandwich one end of the reversing lever 51 from both sides in the axial direction D1 by the pair of side surface portions 464, 465.

  The sleeve member 470 includes first and second restricted portions 471 and 472 that are spaced apart from each other in the axial direction D1, and a connecting portion 480 that connects the first and second restricted portions 471 and 472. Yes.

  The first and second regulated portions 471 and 472 are plate portions that face each other with the first lever end 460 interposed therebetween. The first and second restricted portions 471 and 472 are disposed, for example, at right angles to the axial direction D1.

  The first restricted portion 471 and the second restricted portion 472 are provided with through holes 473 and 474, respectively, and the first control rod 41 is inserted through these through holes 473 and 474. As a result, the sleeve member 470 is loosely supported by the first control rod 41 and is movable relative to the first control rod 41 in the axial direction D1.

  The communication part 480 is a plate part that connects the first and second regulated parts 471 and 472. The connection part 480 is arrange | positioned in parallel with the axial direction D1, for example. Both edges in the axial direction D1 of the connecting portion 480 are integrally connected to the edge of the first restricted portion 471 and the edge of the second restricted portion 472, and the first restricted portion 471, the connecting portion 480, and The second restricted portion 472 is formed in a U shape as a whole.

  The communication portion 480 is provided with an engagement hole 482. The engagement hole 482 is a long hole extending in the axial direction D1. The engagement hole 482 is disposed at a position offset from the center of the connecting portion 480 in the width direction of the connecting portion 480 perpendicular to the axial direction D1.

  The connecting portion 480 is disposed opposite to the outer peripheral surface of the first control rod 41 and the outer peripheral surface of the first lever end 460, and the lever portion 461 of the first lever end 460 is engaged with the engagement hole 482. . Therefore, when the first lever end 460 rotates together with the first control rod 41, the side wall of the engagement hole 482 in the connecting portion 480 of the sleeve member 470 is pushed in the circumferential direction D2 by the lever portion 461. 470 rotates integrally with the first control rod 41.

  The sleeve member 470 includes a pair of projecting portions 476 and 477 that extend from the connecting portion 480 to the opposite side of the first control rod 41. The pair of projecting portions 476 and 477 are integrally connected to the edge portion of the connecting portion 480 in the width direction perpendicular to the axial direction D1. The pair of protrusions 476 and 477 are arranged to face each other in parallel. One protrusion 476 is disposed in the vicinity of the engagement hole 482 of the connecting portion 480. The projecting portions 476 and 477 are provided with through holes 478 and 479 through which the support shaft 58 is inserted.

  As shown in FIG. 21, the first regulated portion 471 of the sleeve member 470 is engaged with a step portion 2 a provided on the inner peripheral surface of the first case member 2. The first regulated portion 471 is restricted from moving in the axial direction D1 toward the rear of the vehicle body by contacting the stepped portion 2a. The second restricted portion 472 is engaged with the mating surface 3 a of the second case member 3 with the first case member 2. The second restricted portion 472 is restricted from moving in the axial direction D1 toward the front of the vehicle body by contacting the mating surface 3a. Since the first and second restricted portions 471 and 472 are engaged with the transmission case 1 in this manner, the movement of the sleeve member 470 in the axial direction D1 is restricted.

  Therefore, the sleeve member 470 rotates in conjunction with the rotation of the first control rod 41 during the select operation, but the first control is controlled by the transmission case 1 when the shift operation is performed. It is not interlocked with respect to the axial movement of the rod 41.

  As shown in FIG. 23, the support shaft 58 is attached to the sleeve member 470 in a state of passing through the pair of projecting portions 476 and 477. The support shaft 58 is attached to the sleeve member 470 so as not to be relatively movable. The support shaft 58 is disposed along a direction perpendicular to the first control rod 41, and this positional relationship is always maintained constant regardless of the rotational position of the sleeve member 470. The support shaft 58 is prevented from coming off by, for example, a head 58a provided at one end thereof and a snap ring 59 attached to the other end.

  The reversing lever 51 can swing around the axis of the support shaft 58 supported by the sleeve member 470 as described above. The cylindrical portion 52 of the reversing lever 51 is sandwiched between the pair of projecting portions 476 and 477 of the sleeve member 470, thereby restricting the movement of the reversing lever 51 in the axial direction of the support shaft 58.

  The first lever portion 53 of the reversing lever 51 passes through the connecting portion 480 through the engagement hole 482 in the connecting portion 480 of the sleeve member 470. The engaging portion 54 provided at the distal end portion of the first lever portion 53 is engaged with the engaging groove 463 of the first lever end 460. The engaging portion 54 is formed in a disk shape, for example. The engaging portion 54 is always disposed at right angles to the side surface portions 464 and 465 of the engaging groove 463 regardless of the swing angle of the reversing lever 51.

  The spherical portion 56 provided at the tip of the second lever portion 55 of the reversing lever 51 is engaged with the second lever end 80 as in the first embodiment.

  Since the first and second control rods 41 and 42 are in communication with each other via the reversing mechanism 450 as described above, for example, as shown in FIG. When the first lever end 460 moves in the axial direction D1, movement of the sleeve member 470 and the support shaft 58 in the axial direction D1 is restricted, and the engaging portion 54 of the reversing lever 51 is engaged with the engaging groove of the first lever end 460. The reversing lever 51 is rotated in the circumferential direction D5 around the axis of the support shaft 58 by being pushed and moved to one side in the axial direction D1 by the one side surface portion 464, 465 in 463.

  In this manner, with the movement of the support shaft 58 in the axial direction D1 restricted, the engagement portion 54 on one end side of the reversing lever 51 is moved to one side in the axial direction D1, so that the other end side of the reversing lever 51 The spherical portion 56 can be moved to the other side in the axial direction D3. As a result, the second control rod 42 engaged with the spherical portion 56 of the reversing lever 51 via the second lever end 80 is moved in the axial direction D3 to the side opposite to the first control rod 41.

  As described above, during the shift operation, the shift motion is transmitted between the first and second control rods 41 and 42 so that the movement direction of the second control rod 42 is reversed with respect to the movement direction of the first control rod 41. Done.

  Further, as shown in FIG. 25, during the select operation, the first lever end 460, the sleeve member 470, the support shaft 58, and the reverse lever 51 are integrally formed with the first control rod 41 in the axial center as in the first embodiment. By swinging in the circumferential direction D <b> 2, the select motion is transmitted between the first and second control rods 41 and 42 so that the second control rod 42 is rotated by the reversing lever 51.

  As described above, also in the fourth embodiment, since the shift motion and the select motion can be transmitted via the reversing mechanism 450 between the first and second control rods 41 and 42, Similar effects can be obtained.

  Further, the sleeve member 470 according to the fourth embodiment connects the first and second restricted portions 471 and 472 fitted to the first control rod 41 with a connecting portion 480 and supports a pair of support shafts 58. Similarly, the projecting portions 476 and 477 are connected by the connecting portion 480. Further, since the first and second restricted portions 471, 472, the pair of projecting portions 476, 477, and the connecting portion 480 constituting the sleeve member 470 are all plate-shaped, one plate material is press-molded. Accordingly, the sleeve member 470 can be easily formed, and the portions 471, 472, 476, 477, 480 of the sleeve member 470 are formed thin, so that the sleeve member 470 can be reduced in weight. .

  Also, in the fourth embodiment, unlike the first embodiment, there is no need to fit a tubular member outside the first lever end 460, so the first lever end 460 is formed on the outer peripheral surface of the first lever end 460. It is not necessary to perform finishing to increase the dimensional accuracy of the outer diameter of 460.

  The speed change operation mechanism 440 in the fourth embodiment is assembled in the following procedure.

  First, various parts of the speed change operation mechanism 440 corresponding to each of the rods 41, 42, 90 are assembled to the first control rod 41, the second control rod 42, and the shift rod 90, and then these rods 41, 42, 90 are assembled. Is assembled to the transmission case 1. When assembling the rods 41, 42, 90 to the transmission case 1, the rods 41, 42, 90 are inserted from above into the second case member 3 placed with the mating surface 3a facing upward. After that, the first case member 2 is put on the rods 41, 42, 90 from above, and the upper ends of the rods 41, 42, 90 are assembled to the first case member 2 and the lower end side of the first case member 2 Is coupled to the mating surface 3 a of the second case member 3.

  In addition, before the first control rod 41 is assembled to the transmission case 1 as described above, a sub-assembly process in which the reversing lever 51 is assembled to the first control rod 41 in advance is performed. The subassembly process is performed, for example, according to the procedure shown in FIG. 26 or the procedure shown in FIG.

  In the example shown in FIG. 26, first, the reverse lever 51 is assembled to the sleeve member 470, and then the sleeve member 470 is fitted to the first control rod 41.

  Specifically, as shown in FIG. 26A, the first lever portion 53 of the reversing lever 51 is inserted into the engagement hole 482 of the sleeve member 470, and the inside of the tubular portion 52 of the reversing lever 51 and the sleeve member 470. The support shaft 58 and the reverse lever 51 are assembled to the sleeve member 470 by inserting the support shaft 58 into the through holes 478 and 479 and attaching the snap ring 59 to the tip of the support shaft 58.

  Subsequently, as shown in FIG. 26B, the first lever end 460 is inserted between the first and second restricted portions 471 and 472 of the sleeve member 470, and the engaging groove 463 of the first lever end 460 is inserted. The lever portion 461 of the first lever end 460 is inserted into the engagement hole 482 of the sleeve member 470 while the engagement portion 54 of the reversing lever 51 is engaged.

  Thereafter, the first control rod 41 is fitted inside the through holes 473 and 474 of the first and second restricted portions 471 and 472 of the sleeve member 470 and the first lever end 460, and the spring pin 469 (see FIG. 21). ) To fix the first lever end 460 to the first control rod 41. As a result, the reversing lever 51 is engaged with the first control rod 41 via the first lever end 460 and the first control rod 41 via the support shaft 58, the sleeve member 470 and the first lever end 460. Assembled into.

  The reversing lever 51 assembled to the first control rod 41 in this way is engaged with the second lever end 80 fixed in advance to the second control rod 42 at the spherical portion 56. Thereby, the reversing lever 51 is engaged with the second control rod 42 via the second lever end 80.

  Note that the reversing lever 51 may be engaged with the second lever end 80 either before or after the first and second control rods 41 and 42 are assembled to the transmission case 1.

  In the example shown in FIG. 27, first, the first lever end 460 and the sleeve member 470 are assembled to the first control rod 41, and then the reversing lever 51 is assembled to the sleeve member 470.

  Specifically, as illustrated in FIG. 27A, the sleeve member 470 and the first lever end 460 are in a state where the lever portion 461 of the first lever end 460 is engaged with the engagement hole 482 of the sleeve member 470. Is fitted to the outside of the first control rod 41, and the first lever end 460 is fixed to the first control rod 41 by the spring pin 469.

  Subsequently, as shown in FIG. 27B, the first lever portion 53 of the reversing lever 51 is inserted into the engagement hole 482 of the sleeve member 470 and the engagement groove 463 of the first lever end 460, and the first lever end. 460 is engaged with the reversing lever 51, and in this engaged state, the support shaft 58 is inserted into the inside of the cylindrical portion 52 of the reversing lever 51 and the through holes 478 and 479 of the sleeve member 470, and the tip of the support shaft 58 is inserted. The reversing lever 51 is assembled to the sleeve member 470 by attaching the snap ring 59 to the sleeve member 470. As a result, the reversing lever 51 is engaged with the first control rod 41 via the first lever end 460 and the first control rod 41 via the support shaft 58, the sleeve member 470 and the first lever end 460. Assembled into.

  26 or 27, when the reversing lever 51 is pre-subassembled to the first control rod 41, the transmission case 1 and the first control rod 41 are combined. Since the reversing lever 51 can be assembled, the work of assembling the transmission operation mechanism 440 having the reversing lever 51 to the transmission case 1 can be simplified.

[Fifth Embodiment]
A speed change operation mechanism 540 according to the fifth embodiment will be described with reference to FIG. In addition, about the component similar to 4th Embodiment, while attaching | subjecting the same code | symbol in FIG. 28, the description is abbreviate | omitted.

  As shown in FIG. 28, the reversing mechanism 550 of the speed change operating mechanism 540 according to the fifth embodiment includes a first lever end 460, a sleeve member 470, a support shaft 58, a reversing lever similar to the reversing mechanism 450 of the fourth embodiment. 51 and the second lever end 80. The first lever end 460 and the sleeve member 470 are provided on the second control rod 42, and the second lever end 80 is provided on the first control rod 41. This is different from the fourth embodiment.

  In the fifth embodiment, the second lever end 80 is fixed to the first control rod 41 by a spring pin 581, whereby the second lever end 80 moves and rotates in the axial direction together with the first control rod 41. I do.

  On the other hand, the first lever end 460 is fixed to the second control rod 42 by a spring pin 569, whereby the first lever end 460 moves and rotates in the axial direction together with the second control rod 42.

  The first regulated portion 471 and the second regulated portion 472 of the sleeve member 470 are loosely fitted to the outside of the second control rod 42. As in the fourth embodiment, the sleeve member 470 is engaged with the lever portion 461 of the first lever end 460, so that the sleeve member 470 rotates together with the first lever end 460 and the second control rod 42. It is possible.

  The first regulated portion 471 of the sleeve member 470 is disposed adjacent to the vehicle body rear side of the mating surface 3a of the second case member 3, and a bolt 592 is provided on the vehicle body rear side of the first regulated portion 471, for example. Therefore, the regulation plate 590 fixed to the second case member 3 is disposed adjacent to the second case member 3. Thus, the movement of the sleeve member 470 in the axial direction D3 is regulated by the first regulated portion 471 being sandwiched from both sides in the axial direction D3 by the mating surface 3a of the second case member 3 and the regulating plate 590. . Thereby, the sleeve member 470 is not interlocked with respect to the axial movement of the second control rod 42.

  However, the configuration for restricting the movement of the sleeve member 470 in the axial direction D3 is not limited to this. For example, the step 2a (see FIG. 21) of the first case member 2 as in the fourth embodiment is used. If it can be formed in the vicinity of the second control rod 42, the second restricted portion 472 may be engaged with the stepped portion 2 a, and in this case, the sleeve member 470 in the axial direction D 3 toward the rear side of the vehicle body. The movement toward the front side of the vehicle body can be restricted by the mating surface 3a of the second case member 3 while the movement is restricted by the step portion 2a.

  The support shaft 58 is attached to the sleeve member 470 as in the fourth embodiment, and the reversing lever 51 is swingable about the axis of the support shaft 58 supported by the sleeve member 470. Similarly to the fourth embodiment, the reversing lever 51 is engaged with the first lever end 460 at the engaging portion 54 of the first lever portion 53, and the second lever at the spherical portion 56 of the second lever portion 55. The end 80 is engaged.

  Since the first and second control rods 41 and 42 are connected to each other through the reversing mechanism 550 as described above, the first control rod 41 and the second lever end 80 are axially moved in conjunction with the shift operation. When moved to D1, the movement of the sleeve member 470 and the support shaft 58 in the axial direction D3 is restricted, and the spherical portion 56 of the reversing lever 51 is pushed and moved to one side in the axial direction D1 by the second lever end 80. The reversing lever 51 rotates in the circumferential direction D5 around the axis of the support shaft 58.

  In this state where the movement of the support shaft 58 in the axial direction D3 is restricted, the spherical portion 56 on one end side of the reversing lever 51 is moved to one side in the axial direction D1, so that the other end side of the reversing lever 51 is moved. The engaging portion 54 can be moved to the other side in the axial direction D3. Accordingly, the second control rod 42 engaged with the engaging portion 54 of the reversing lever 51 via the first lever end 460 is moved in the axial direction D3 to the opposite side to the first control rod 41.

  When the second lever end 80 rotates in the circumferential direction D2 together with the first control rod 41 during the selection operation, the spherical portion 56 of the reversing lever 51 is pushed in the circumferential direction D2 by the second lever end 80. The reversing lever 51, the support shaft 58, the sleeve member 470, the first lever end 460, and the second control rod 42 are integrally rotated in the circumferential direction D4 around the axis. At this time, the rotation direction of the second control rod 42 is opposite to the rotation direction of the first control rod 41.

  As described above, during the selection operation, the selection between the first and second control rods 41 and 42 is performed so that the rotation direction of the second control rod 42 is reversed with respect to the rotation direction of the first control rod 41. Movement is transmitted, and the shift between the first and second control rods 41 and 42 is performed so that the movement direction of the second control rod 42 is reversed with respect to the movement direction of the first control rod 41 during the shift operation. Movement is transmitted. Therefore, the same effect as the fourth embodiment can be obtained.

  In the assembly of the speed change operation mechanism 540 in the fifth embodiment, the reverse lever 51 is pre-assembled to the second control rod 42 in the sub-assembly process similar to the fourth embodiment, so that the transmission case 1 can be assembled. Since the reversing lever 51 can be assembled together with the second control rod 42, the work of assembling the transmission operation mechanism 540 having the reversing lever 51 to the transmission case 1 can be simplified.

  While the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments.

  For example, in the above-described embodiment, the example in which the change lever 200 is connected to the first control rod 41 via the change rod 190 has been described. However, in the present invention, the change lever and the first control rod are interposed via the change rod. The present invention can also be applied to a case where they are directly connected without being connected.

  In the present invention, the configuration for selectively engaging the second control rod 42 with the plurality of shift forks is not limited to the above configuration, and various modifications are possible. For example, in the above-described embodiment, an example in which two shift finger sets 91 and 92 are provided and two shift forks are selectively engaged with each shift finger set has been described. The number of shift forks to be shared and the number of pairs of shift finger sets are not particularly limited.

  Furthermore, in the present invention, the configuration for supporting each shift fork is not limited to the above configuration, and various modifications are possible. For example, in the above-described embodiment, an example in which two shift forks are loosely supported by the second control rod 42 and two shift forks are fixed or loosely supported by the shift rod 90 has been described. The fork may be supported by any rod, and the number of shift rods is not limited. For example, the shift rod may be eliminated and all the shift forks may be loosely supported by the second control rod 42. Good.

  In the first to third embodiments described above, the sleeve members 70 and 370 are fitted to the first control rod 41, but may be fitted to the second control rod 42.

  Furthermore, in the first to third embodiments, the description of the method for assembling the speed change operation mechanism is omitted, but the speed change operation mechanisms according to these embodiments are the same as in the fourth and fifth embodiments. After the sub-assembly process for assembling the reversing lever to the second control rod is performed, the control rod may be assembled to the transmission case. As a result, the speed change operation mechanism having the reversing lever can be attached to the transmission case. Assembly work is simplified.

  As described above, according to the present invention, it is possible to simplify, downsize, and reduce the weight of the speed change operation mechanism that can reverse the moving directions of the plurality of shift forks. There is a possibility of being suitably used in the manufacturing industry of a manual transmission having an operation mechanism.

DESCRIPTION OF SYMBOLS 1 Transmission case 2 1st case member 3 2nd case member 4 Transmission mechanism 5 Main shaft 6 Input shaft 7 Output shaft 8 Countershaft 31, 32, 33, 34 Synchronizer 40 Transmission operation mechanism 41 1st control rod 42 2nd Control rod 50 Reversing mechanism 51 Reversing lever 52 Cylindrical part 53 First lever part 54 Engaging part 55 Second lever part 56 Spherical part 58 Support shaft 60 First lever end 61, 62 Projection 63 Engaging groove (first engagement) Joint)
64, 65 Side surface portion 70 Sleeve member 72 Peripheral wall portion 76, 77 Plate portion 80 Second lever end 82 Lever portion 83 Hole (second engaging portion)
84 Guide plate 90 Shift rod 91 First shift finger set (first set)
92 Second shift finger set (second set)
93 Shift finger 100 Interlock regulating member 123 Reverse fork gate 132 Reverse shift fork 143 1-2 speed fork gate 144 1-2 speed shift fork 153 3-4 speed fork gate 154 3-4 speed shift fork 163 5-6 speed fork gate 164 5-6 speed shift fork 190 Change rod 200 Change lever 240 Shifting operation mechanism 250 Engaging groove 260 Positioning pin 340 Shifting operation mechanism 350 Reverse mechanism 360 First lever end 363, 364 Protruding part (first engaging part)
370 Sleeve member 375 Notch 440 Shifting operation mechanism 450 Reversing mechanism 460 First lever end 461 Lever (projection)
463 engagement groove (first engagement portion)
470 Sleeve member 471 First restricted portion 472 Second restricted portion 480 Communication portion 482 Engagement hole 540 Shifting operation mechanism 550 Reverse mechanism 590 Restriction plate

Claims (9)

A control rod connected to the change lever so as to rotate during the select operation and move in the axial direction during the shift operation, and selectively engaged with the control rod and coupled with the axial movement of the control rod. A shift operation mechanism for a transmission comprising a plurality of shift forks that actuate a synchronization device by being moved in a direction,
The control rod includes a first control rod communicated with the change lever, and a second control rod disposed in parallel to the first control rod and selectively engaged with the plurality of shift forks.
The first and second control rods are in communication with each other via a reversing lever that moves the second control rod in the axial direction to the opposite side of the movement direction of the first control rod during a shift operation. A speed change mechanism for a transmission.   The reversing lever causes the first and second control rods to communicate with each other so that the second control rod is rotated in a direction opposite to the rotation direction of the first control rod during a selection operation. The speed change operation mechanism of the transmission according to claim 1, wherein A sleeve member that rotates in conjunction with the rotation of the one rod and whose axial movement is restricted is fitted to either one of the first or second control rods,
The speed change of the transmission according to claim 1 or 2, wherein the reversing lever is supported by a support shaft attached to the sleeve member so as to be swingable around an axis of the support shaft. Operation mechanism. The first control rod has a first engagement portion that is engaged with one end of the reversing lever so as to swing the reversing lever in conjunction with the axial movement of the first control rod during a shift operation. Provided,
A second engagement engaged with the other end of the reversing lever so as to move the second control rod in the axial direction in conjunction with the swing of the reversing lever during a shift operation. The transmission operation mechanism for a transmission according to claim 3, wherein a portion is provided. A spherical portion is provided at the end of the reversing lever opposite to the one rod,
The transmission operation mechanism for a transmission according to claim 4, wherein the first or second engagement portion is a hole into which the spherical portion is fitted. A transmission case that houses the transmission mechanism of the transmission includes a first case member and a second case member that are coupled to each other.
The sleeve member is
The transmission case is engaged so that axial movement to one side is restricted by the first case member and axial movement to the other side is restricted by the second case member. The transmission operation mechanism for a transmission according to any one of claims 3 to 5. The sleeve member includes a peripheral wall portion surrounding the one rod,
The said inversion lever is provided through the said surrounding wall part, and is engaged with the said one rod inside this surrounding wall part, The Claim 1 characterized by the above-mentioned. Gear shifting operation mechanism of the transmission. The sleeve member has a first restricted portion whose axial movement to the one side is restricted by contacting the first case member, and a shaft to the other side by contacting the second case member. A second restricted portion in which direction movement is restricted, and a communication portion that connects between the first restricted portion and the second restricted portion,
The one rod is provided with a protrusion protruding outward from the outer peripheral surface of the rod,
The transmission operation mechanism for a transmission according to claim 6, wherein the communication portion is provided with an engagement hole to be engaged with the protrusion. An assembly method for a transmission operating mechanism of a transmission having a control rod for communicating between a change lever and a plurality of synchronization devices,
The control rod includes a first control rod communicated with the change lever, and a second control rod disposed in parallel to the first control rod and selectively communicated with the plurality of synchronization devices,
One end side of the reversing lever that moves the second control rod in the axial direction to the side opposite to the moving direction of the first control rod when the first control rod moves in the axial direction is either the first or second control rod. A first engagement step for engaging with one of the rods;
A subassembly step of assembling the reversing lever to the one rod;
A second engagement step of engaging the other end of the reversing lever with the other rod of the first or second control rod;
A method of assembling the transmission operation mechanism of the transmission, comprising a case assembling step of assembling the first and second control rods and the reversing lever to the transmission case after the sub-assembly step.

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