JPH1182735A - Shift stage detection mechanism of manual transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect all the shift stages by minimum detection switches without aimlessly increasing detection switches in a manual transmission. SOLUTION: Shift detection means 6, 7, 8 detecting shaft direction moving of shift rail mechanisms 2, 3, 4 are constituted of first recessed and projection parts 32, 33, 34 formed in the shift rail mechanisms 2, 3, 4 and shift switches 16, 17, 18 outputting shift signals corresponding to recessed and projection parts of the first recessed and projection parts 32, 33, 34, the same shift signals are outputted by a first shift stage and a second shift stage and different shift signals are outputted in a neutral state. A select detection means 9 detecting shaft direction moving of a select rail mechanism 5 is constituted of a second recessed and projection part 35 formed in the select rail mechanism 5 and a select switch 19 outputting select signals corresponding to recessed and projection parts of the second recessed and projection part 35. Different select signals are outputted 5n the first shift stage and second shift stage, the same select signal as the one side is made to be outputted in the neutral state and all the shift stages are detected by the combination of the shift signals and the select signals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual transmission in which any one of a plurality of forward speeds, reverse speeds, and a neutral position can be selected by operating a shift lever to detect the selected state of all shift speeds. , A gear position detection mechanism of a manual transmission.

[0002]

2. Description of the Related Art Conventionally, a vehicle such as an automobile has been provided with a transmission that changes the rotational speed of an engine and outputs the same.
One shift speed can be selected from among the three reverse speeds. By the way, in recent years, a technique for performing engine control or the like based on information on selection of a gear position has been developed, and in such control, it is essential to detect a selected state of the gear position.

In an automatic transmission, a controller (CPU) selects a shift speed based on an operating state of an engine. Therefore, regardless of which shift speed is selected, it is necessary to obtain shift speed selection information from the controller. Can be. On the other hand, in a manual transmission, one of a plurality of forward gears and a reverse gear or a neutral position is selected according to a manual operation of a gear shift lever by a driver. Is only provided with a reverse light detection switch for turning on the reverse light when selecting the reverse gear, and when the forward gear or the neutral position is selected, which gear is selected. I can't know.

[0004] Therefore, in a manual transmission, there is a demand for the development of a gear position detecting mechanism capable of detecting the selected state of all gear positions. One of the technologies that can be used when developing such a gear position detection mechanism for a manual transmission is firstly a reverse light detection switch mechanism (broadly speaking, a speed change mechanism) provided for detecting the reverse gear. Step detection mechanism)
It is.

A reverse gear detection mechanism, that is, a reverse light detection switch, of a conventional manual transmission will be described with reference to sectional views of the manual transmission shown in FIGS. As shown in FIGS. 5 and 6, the manual transmission 101 includes a 1-2 shift rail mechanism 102, a 3-4 shift rail mechanism 103,
It has three shift rail mechanisms, ie, a 5-R shift rail mechanism 104, which allows five forward gears and one reverse gear. These shift rail mechanisms 102, 10
3 and 104 are shift rails 112 and 113, respectively.
114 and these shift rails 112, 113, 114
The shift rails 112, 113, 114 are provided with engaging portions 112a, 113a, 114a with which select fingers 125 described later are engaged.

The shift rail mechanism 102,
A select rail mechanism 105 is provided in parallel with 103 and 104. This select rail mechanism 105
The selector rail 115 includes a select rail 115 and a select finger 125 supported by the select rail 115. An operating end of a shift lever (not shown) is connected to one end of the select rail 115.

By operating the shift lever (not shown), a shift by the manual transmission 101 is achieved. That is, first, when the select rail 115 is rotated around the axis by the select operation of the shift lever, the select finger 125 supported by the select rail 115 also rotates around the axis integrally, and according to the stroke of the select operation. Engage with any one of the engaging portions 112a, 113a, 114a, and thereby, the shift rail mechanism 102,
Any one of 103 and 104 is selected.

Next, the select rail 115 is moved in the axial direction by a shift operation of the shift lever. Where 5
When the -R shift rail mechanism 104 is selected, when the select rail 115 is moved to one side in the axial direction, the shift rail 114 is also integrally moved to one side in the axial direction via the select finger 125 and the engaging portion 114a. The fifth gear is set. Conversely, select rail 115
Is moved in the other axial direction, the shift rail 114 is also moved in the other axial direction, so that the shift speed setting to the reverse gear is achieved. Further, when the shift operation is not performed after the shift lever is selected, the neutral state is set.

The shift rail mechanism 104 is provided with a shift rail 114 on the shift rail 114 after the shift operation and in a neutral state in order to provide a sense of moderation and a good shift feeling. A locking portion 114b provided at each position in the neutral state,
A poppet mechanism 1 including a steel ball 130a that locks on the locking portion 114b and a spring 130b that urges the steel ball.
30 are provided. This is the shift rail mechanism 10
The same applies to 2,103.

Further, an uneven portion 114c is provided on the shift rail 114, and a backward switch 116 is provided near the concave portion 114c. The backward light switch 116 has its tip 1
16a is brought into contact with the shift rail 114, and the shift lever is shifted to the reverse step side, and when the shift rail 114 moves forward, the concave portion of the concave and convex portion 114c becomes the tip end 116a.
To come into contact with.

The gear position detecting mechanism 106 includes a backward light switch 116 and an uneven portion 114c. The shift lever is shifted to the reverse gear side, and the shift rail 114 moves forward. When the concave portion of the concavo-convex portion 114c comes to be located at the front end portion 116a, the front end portion 116a protrudes and the backward light switch 116 outputs a detection signal indicating that the reverse stage is selected, and the backward light (not shown) is turned on.

As described above, in the conventional manual transmission, the detection of the shift to the reverse gear is performed by the gear position detecting mechanism 106 including the concave / convex portion 114c formed on the shift rail 114 and the reverse light switch 116. Thus, such a gear position detection mechanism 106 has a simple configuration and operates extremely reliably.

[0013]

By the way, it is sufficiently possible to apply the gear position detecting mechanism 106 relating to the reverse light switch to the detection of other gear positions, so that each shift rail 112, 113, A forward switch and a reverse switch are provided for each 114, and the forward and backward movements of the shift rails 112, 113, and 114 are detected by these switches, and all shift speeds of first to fifth forward speeds and reverse are detected. It is also possible.

However, when a detection switch for detecting the forward / backward movement of each shift rail is provided for each shift rail as described above, a total of six detection switches are provided for a manual transmission having five forward speeds and one reverse speed. (Including a conventional reverse light switch), which causes a problem that the cost is increased and the mechanism is complicated. SUMMARY OF THE INVENTION The present invention has been made in view of such a problem, and in a manual transmission in which a plurality of forward gears, reverse gears, or a neutral position can be selected by a manual operation, a minimum number of detection switches can be attained without an additional detection switch. It is an object of the present invention to provide a gear position detection mechanism for a manual transmission, capable of detecting all gear positions with a limited number of detection switches.

[0015]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, according to the first aspect of the present invention, when selecting a gear position in a manual transmission, first, a gear position is selected. By operating the shift lever to operate the select rail mechanism, selecting one of the plurality of shift rail mechanisms, and then shifting the shift lever to select the selected shift rail mechanism via the select rail mechanism. The shifted shift rail mechanism in the axial direction. At this time, when the shift rail mechanism is moved in one axial direction, the first shift speed is selected, and when the shift rail mechanism is moved in the other axial direction, the second shift speed is selected. Is selected. In the gear position detecting mechanism, the select detecting means and the shift detecting means detect each operation state corresponding to such a select operation and a shift operation, and detect a gear position from each state of the select operation and the shift operation.

That is, in the shift detecting means, the first uneven portion provided on the shift rail mechanism moves in accordance with the axial movement of the shift rail mechanism, and the shift switch corresponds to the unevenness of the first uneven portion. To output a shift signal based on ON / OFF. At this time, when the shift rail mechanism and the first concave / convex portion are at positions where one of the first shift speed and the second shift speed is selected, the same shift signal is output from the shift switch, and is different when the shift switch is in the neutral state. A shift signal is output. Therefore, it is possible to recognize from the shift signal whether each shift rail mechanism has selected one of the first and second shift speeds or whether the shift rail mechanism is in the neutral state.

In the select detecting means, when the select rail mechanism moves in the axial direction, the second concave / convex portion provided on the select rail mechanism also moves at the same time, and the select switch responds to the concave / convex of the second concave / convex portion. Outputs a select signal based on ON / OFF. At this time, when the shift rail mechanism is at the position where the first shift speed is selected, a different select signal is output than when the shift rail mechanism is at the position where the second shift speed is selected, and when the shift rail mechanism is in the neutral state, one of the select signals is output. The same select signal as in the case of the selected position is output. Therefore, the shift rail mechanism is in one of the first gear position selection position and the second gear position selection position or in the neutral state, or the shift rail mechanism is in the first gear position selection position and the second gear position selection position.
It is possible to recognize which of the gear position selection positions is the other.

The combination of the shift signal and the select signal detected and output by the shift detecting means and the select detecting means, respectively, determines which gear position the manual transmission is selected or is in the neutral position. Can be detected. According to a second aspect of the present invention, there is provided a shift position detecting mechanism for a manual transmission, wherein one shift switch is provided for each shift rail mechanism. By providing one switch in the select rail mechanism, it is possible to detect in which gear position the manual transmission is being shifted or the neutral position with a minimum number of shift switches and select switches.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. First, the structure of the gear position detecting mechanism of the present manual transmission will be described. FIG. 1 is a partial cross-sectional view of the gear position detecting mechanism of the present manual transmission as viewed from the rear, and FIG.
FIG. 3 is a cross-sectional view as viewed in the direction of the arrow A1. FIG. 3 is a cross-sectional view as viewed in the direction of the arrow A2-A2 in FIG.

As shown in FIGS. 1 and 2, the manual transmission 1
Is provided with three shift rail mechanisms of a 1-2 shift rail mechanism 2, a 3-4 shift rail mechanism 3, and a 5-R shift rail mechanism 4.
Reference numerals 3 and 4 denote shift rails 12, 13, and 14 disposed in parallel with the rotation axis direction of the transmission, and forks (not shown) fixed to the shift rails 12, 13, and 14, respectively. ing. Note that the leftward direction in FIGS. 2 and 3 is defined as the front of the transmission 1 in the axial direction.

Each of the shift rails 12, 13, and 14 is movable in the front-rear axis direction, and is moved in the front-rear direction by a shift operation of a shift lever 10 described later to be fixed to each of the forks (not shown). By moving it in the appropriate axial direction (forward or backward)
It is possible to operate five forward speeds and one reverse speed.
Further, as shown in FIG. 2, each of the shift rails 12, 13,.
14 are provided with concave engaging portions 12a and 13 respectively.
a, 14a are arranged side by side, and each of the engagement portions 12a, 13
The concave groove portions of a and 14a are the engaging portions 112a, 113a and 114 which have already been described as the prior art with reference to FIG.
Similarly to a, they are arranged at the same distance from the axis of the select rail 5 shown in FIG.

Each of the shift rail mechanisms 2, 3, and 4 has a first gear position selection position moved in one direction (forward) in the axial direction and a second position selected in the other direction (rear) in the axial direction. Locking holes 12 provided on shift rails 12, 13, and 14 in accordance with the gear position selection position and the intermediate positions thereof.
b, 13b, 14b and each locking hole 12b, 13b, 14
The poppet mechanisms 30 each include a steel ball 30a that locks the steel ball 30b and a spring 30b that urges the steel ball. The poppet mechanism 30 is for positioning the shift rails 12, 13, and 14 after the shift operation and in the neutral state, and for improving the shift feeling by giving a sense of moderation.

Each of the shift rail mechanisms 2, 3, and 4 is provided with 1-2 shift detecting means 6, 3-4 shift detecting means 7, and 5-R shift detecting means 8, respectively. These 1-2 shift detecting means 6, 3-4 shift detecting means 7, and 5-R shift detecting means 8 are provided with concave and convex portions 32, 33, 3 provided on shift rails 12, 13, and 14, respectively.
4 and 1-2 shift switches 16, 3-3, which are respectively disposed so as to face these uneven portions 32, 33, 34.
It comprises a 4-shift switch 17 and a 5-R shift switch 18.

The concavo-convex portions 32, 33, 34 are each composed of one protruding portion 32a, 33a, 34a and two concave portions 32b, 32c, 33b, 33c, 3 provided on the front and rear sides thereof.
4b and 34c. On the other hand, the shift switches 16, 17, 18 have their tip portions 16a, 17a, 1
8a is pressed against these concave and convex portions 32, 33, and 34, and when the shift lever 10 is in the neutral state, the tip portions 16a, 17a, and 18a are convex portions 32a, 33a, and 34a.
It comes into contact with the top. When the shift lever 10 is shifted in the front-rear direction, the shift rails 12, 13, 1
4 moves in the front-rear axis direction, so that the uneven portions 32, 33, 3
4, the contact portions with the tip portions 16a, 17a, 18a are also changed from the convex portions 32a, 33a, 34a to the concave portions 32 in front and behind thereof.
b, 32c, 33b, 33c, 34b, 34c, and the tip portions 16a, 17a, 18a project and react. Each of the shift detecting means 6, 7, 8 is provided with a corresponding one of the shift switches 16, 17,
18, concave portions 32b, 32c of the concave / convex portions 32, 33, 34;
The shift signal (ON) is output to the CPU 26 only when the CPU 26 comes into contact with the CPU 33b, 33c, 34b, 34c.

On the other hand, as shown in FIGS. 1 and 3, a select rail mechanism 5 is provided in parallel with the shift rail mechanisms 2, 3, and 4. And a select finger 25 supported by the select rail 15. The select rail 15 is disposed in parallel with the shift rails 12, 13, and 14, one end of which is extended, and the transmission lever 10 is attached to the extended end. The select rail 15 can move in the front-rear direction and rotate around the axis. The select rail 15 rotates about the axis by a select operation of the transmission lever 10 and moves in the front-rear direction by a shift operation.

The select finger 25 is the shift rail 1
2, 13 and 14 are provided with claw portions (not shown) for engaging with the grooves of the engaging portions 12a, 13a and 14a, and are always engaged with any one of the engaging portions 12a, 13a and 14a. I have. Then, when the select rail 15 is rotated around the axis by the selection operation of the shift lever 10, the select finger 25 is also rotated around the axis together with the select rail 25 to engage with any one of the engaging portions 12a, 13a, and 14a. It has become. When the shift lever 10 is shifted, any movement of the select rail 15 in the front-rear axial direction is performed via the select finger 25 and any of the engaging portions 12a, 13a, and 14a engaged with the select finger 25. To the shift rails 12, 13 and 14.

The select rail mechanism 5 is provided with a select detecting means 9. That is, on the select rail 15, an uneven portion 35 including one convex portion 35a and one concave portion 35b provided in the axial front thereof is provided, and the uneven portion 35 is opposed to the uneven portion 35. The select detection means 9 is constituted by the select switch 19 arranged to perform the operation. Select switch 19
Abuts against the concave portion 35b when the shift lever 10 is in a neutral state and when the shift lever 10 is shifted to one side (here, forward) when the shift lever 10 is in a neutral state. When the lever 10 is shifted to the other side (here, rearward), the lever 10 comes into contact with the convex portion 35a. Then, select detecting means 9
The select signal (ON) is sent to the CPU 26 only when the select switch 19 comes into contact with the convex portion of the concave / convex portion 35, that is, only when the shift lever 10 is operated to the other side (rearward) and the select rail 15 is moved forward. ) Is output.

The CPU 26 includes shift detecting means 6, 7, 8
4 is combined with the select signal input from the select detecting means 9 as shown in FIG. 4 to select one of the first to fifth forward speeds, the first reverse speed, or the intermediate position. Is detected. Since the gear position detecting device for a manual transmission according to one embodiment of the present invention is configured as described above, operating the shift lever 10 allows the manual transmission 1 to shift between the forward five speeds and the reverse one speed. , One of the gear positions is selected.

That is, first, when the shift lever 10 is selected, the select rail 15 rotates around the axis.
The select finger 25 fixed to the select rail 15 also rotates around the axis together with the select finger 25, and the engaging portions 12a, 13 of any one of the shift rails 12, 13, 14 are shifted.
a, 14a. Thus, any one of the shift rail mechanisms 2, 3, 4 is selected.

Next, by the shift operation of the transmission lever 10,
The select rail 15 is moved in the axial direction. here,
The shift rail mechanism selected by the selection operation of the shift lever 10 will be described as an example in which the 1-2 shift rail mechanism 2 is used. First, when the shift lever 10 is operated forward to move the select rail 15 backward in the axial direction,
The shift rail 12 also moves axially rearward as a unit via the select finger 25 and the engaging portion 12a, and the shift to the first speed (here, first speed) is achieved.

At this time, the uneven portion 32 of the 1-2 shift rail 12 also moves backward with respect to the 1-2 shift switch 16, and the contact portion on the uneven portion 32 with respect to the 1-2 shift switch 16 is a convex portion 32a. To the concave portion 32b on the front side of the convex portion 32a
Move to. As a result, a shift signal (ON) is output from the 1-2 shift detection means 6, and the CPU 26 outputs the first speed or the second speed.
It detects that the shift has been achieved at any of the speeds.

The concave / convex portion 35 also moves rearward with respect to the select switch 19 by the rearward movement of the select rail 15, but the contact portion of the concave / convex portion 35 with the select switch 19 remains in the concave portion 35b. As a result, OFF is output as a select signal from the select detecting means 9, and the CPU 26 detects that the select rail 15 has been shifted to the neutral position or the rear side. Therefore,
As shown in FIG. 4, the CPU 26 can detect that the gear has been shifted to the first speed by a combination of the shift signal and the select signal.

Conversely, when the shift lever 10 is operated rearward to move the select rail 15 axially forward and the second shift stage (second speed here) is selected, the uneven portion 35 is also shifted to the 1-2 shift switch 16. , And the contact portion on the uneven portion 32 with respect to the 1-2 shift switch 16 is
a to the concave portion 32c on the rear side of the convex portion 32a. As a result, the shift signal (ON) is output from the 1-2 shift detecting means 6.
Is output, and the CPU 26 detects that the shift has been achieved in either the first speed or the second speed.

Further, as the select rail 15 moves forward, the concave / convex portion 15c also moves forward with respect to the select switch 19, and the contact portion of the concave / convex portion 35 with the select switch 19 moves from the concave portion 35b to the convex portion 35a. As a result, ON is output as the select signal from the select detecting means 9, and the CPU 26 detects that the shift operation is performed to the front side. Therefore, as shown in FIG. 4, the CPU 26 can detect that the speed has been shifted to the second speed by a combination of the shift signal and the select signal.

Similarly, when the shift lever 10 is operated to select the 3-4 shift rail mechanism 3 or the 5-R shift rail mechanism 4, the 3-4 shift detection means 7 or 5 is also selected.
Based on the combination of the shift signal (ON) of the R shift detecting means 8 and the select signal (ON or OFF) of the select detecting means 9, as shown in FIG. When the shift lever 10 is not shifted, the shift lever 16 is in a neutral state. At this time, the shift switches 16, 17, and 18 are all in the uneven portions 32, 33, and 34.
Remain in contact with the convex portions 32a, 33a, 34a of
All the shift signals of the shift detecting means 6, 7, 8 are turned off, and the CPU 26 detects that it is in the neutral state.

When the 5-R shift rail mechanism 4 is selected by the selection operation and the shift operation is performed to the reverse side, the CPU 26 detects the shift to the reverse gear and turns on a rear light (not shown). As described above, according to the gear position detection mechanism of the manual transmission according to the present embodiment, the shift signal output from the shift detection means 6, 7, 8 provided in each shift rail mechanism 2, 3, 4, and the select signal By combining with the select signal output from the select detecting means 9 provided in the rail mechanism 5, the forward
It is possible to detect all the gear positions in the fifth speed, the first reverse speed, and the neutral state.

The shift detecting means 6, 7,
8 and select detection means 9
Uneven portions 32, 33, 34 or uneven portions 35 formed by cutting out portions of 2, 13, 14 or select rail 15
And the combination of the shift switches 16, 17, 18 or the select switch 19, the configuration can be made extremely easily and inexpensively. Further, since these detecting means 6, 7, 8, and 9 have the same configuration as that of the reverse-stage detecting means conventionally used for turning on the backward light, the operation thereof is extremely reliable, and the durability is high. Nature can be secured.

Further, the shift switches 16, 1
The number of switches 7 and 18 and the number of select switches 19 need only be mounted on each of the shift rails 12, 13, 14 or the select rail 15, so that the number of mounted switches can be greatly reduced as compared with the case where the detection switches are mounted for each shift speed. And cost can be reduced. Incidentally, like the gear position detection mechanism of the manual transmission according to the present embodiment, the forward 5
In the case of a manual transmission of one speed and one reverse speed, a total of six gears are required if a detection switch is attached for each gear, but in the gear speed detection mechanism of this manual transmission, three shift switches 1 are used.
Only four switches, 6, 17, 18 and one select switch 19, are required.

It should be noted that the present invention is not limited to the above-described embodiment, and can be implemented with various modifications without departing from the spirit of the present invention. For example, the number of gears is not limited. Further, the on / off configuration of each switch may be set completely opposite to the embodiment.

[0040]

As described above in detail, according to the gear position detecting mechanism of the manual transmission according to the first aspect of the present invention, the shift signal output from the shift detecting means provided in the shift rail mechanism, By combining with the select signal output from the select detecting means provided in the select rail mechanism, all shift speeds including the neutral state can be reliably detected.

In addition, the shift detecting means and the select detecting means comprise a first concave / convex portion formed on the shift rail mechanism or a second concave / convex portion formed on the select rail mechanism, respectively, and a shift switch or select switch. Because of the combination with the switch, the present detection mechanism can be configured extremely simply and at low cost. Further, since these shift detecting means and select detecting means have the same type as the structure of the reverse gear detecting means which has been widely used for turning on the backward light, the operation state is extremely reliable. There is an advantage that durability can be secured.

According to the shift speed detecting mechanism for a manual transmission according to the present invention, the same effect as that of the shift speed detecting mechanism for a manual transmission according to the first aspect can be obtained, and further, these shifts can be achieved. Since only one switch and one select switch need to be mounted on each shift rail mechanism or select rail mechanism, the number of switches and select switches can be significantly reduced compared to the case where the detection switches are mounted for each shift speed, thereby reducing costs. Can be planned.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part of a manual transmission as viewed from the rear, showing a configuration of a gear position detection mechanism of a manual transmission as one embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a shift rail mechanism provided in a gear position detecting mechanism of the manual transmission as one embodiment of the present invention, and is a cross-sectional view taken along line A1-A1 of FIG.

FIG. 3 is a cross-sectional view showing a configuration of a select rail mechanism provided in a gear position detecting mechanism of the manual transmission as one embodiment of the present invention, and is a cross-sectional view taken along the line A2-A2 of FIG. The section is A2'-A2 'cross-sectional view.

FIG. 4 is a diagram illustrating determination of a shift speed based on a combination of a shift signal and a select signal in a shift speed detection mechanism of a manual transmission as one embodiment of the present invention.

FIG. 5 is a cross-sectional view of a manual transmission, viewed from the rear, showing a configuration of a gear position detection mechanism of the conventional manual transmission.

FIG. 6 is a cross-sectional view showing a configuration of a gear position detecting mechanism of the conventional manual transmission, and is a view substantially along the BB cross section of FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Manual transmission 2,3,4 Shift rail mechanism 5 Select rail mechanism 6,7,8 Shift detection means 9 Select detection means 10 Shift lever 12,13,14 Shift rail 15 Select rail 16,17,18 Shift switch 19 Select Switch 22, 23, 24 Fork 25 Select finger 26 CPU 32, 33, 34 First uneven part 35 Second uneven part

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Makoto Fukuen 5-33-8 Shiba, Minato-ku, Tokyo Inside Mitsubishi Motors Corporation

Claims (2)

[Claims] A shift lever and a plurality of shift levers for selecting a first shift stage by axial movement to one side and selecting a second shift stage by axial movement to the other, and having a neutral state at an intermediate position. A shift rail mechanism, operated by a select operation of the shift lever to select any one of the plurality of shift rail mechanisms, and operated by a shift operation of the shift lever to move the shift rail mechanism to the one side. Or a select rail mechanism capable of moving to the other, in a manual transmission capable of selecting one of a plurality of shift speeds and a neutral position by a combination of the select operation and the shift operation of the shift lever, A shift detecting means for detecting an axial movement of the shift rail mechanism; and a select detecting means for detecting an axial movement of the select rail mechanism. Comprises a first uneven portion formed on the shift rail mechanism, and a shift switch for outputting a shift signal by turning on and off corresponding to the unevenness of the first uneven portion. The same shift signal is output if the concave and convex portion is located at a position for selecting either the first gear or the second gear. In the neutral state, a shift signal different from that at the time of gear selection is output. And a select switch configured to output a select signal by turning on and off corresponding to the unevenness of the second uneven portion. The select switch outputs a different select signal depending on whether the second concave / convex portion is located at the position for selecting the first shift speed or when the second concave / convex portion is located at the position for selecting the second shift speed. , In the neutral state It is configured to output the same select signal as in the case of either one of the selected positions, and by combining the shift signal and the select signal,
A gear position detecting mechanism for a manual transmission, which detects which of the plurality of gear positions and the neutral position is selected. 2. The manual transmission according to claim 1, wherein one shift switch is provided for each shift rail mechanism, and one select switch is provided for the select rail mechanism. Speed detection mechanism of the machine.