JP2003113938A - Error preventing structure in reverse operation for manual transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a recognition when selecting a reverse transmission stage, and prevent an erroneous operation to a side of a reverse transmission stage to be established, avoiding increases in component count and in weight, in a manual transmission in which plural shift pieces including a shift piece for reverse are arranged in parallel in a shift arm selecting direction. SOLUTION: The shift piece 104 for reverse at a neutral position is arranged to be able to contact with a shift arm 90 performing a select operation, and to offset to a shift operation direction 122 from other shift pieces 101-103 in a neutral position. At least one of mutual contact parts of the shift arm 90 and the shift piece 104 for reverse urged against a side of the neutral position is formed at an inclined surfaces 104b, 90b against a select operation direction 123, so that pressing power can work onto a reverse position side from the shift arm 90 to the shift piece 104 for reverse.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention
That enables shift operation between the neutral position and the neutral position
Multiple shift pieces, including
Manual operation that is arranged in parallel with the select operation direction of the arm
Regarding the transmission, especially when selecting the reverse gear
Improving intelligence and erroneous operation toward the side where reverse gear is established
The improvement of the structure to prevent 2. Description of the Related Art While a vehicle is traveling forward, a vehicle driver
Incorrectly operating the control lever to the reverse select position
For example, moving forward at a certain speed or higher
While traveling, move to the reverse select position side of the shift arm.
Manual transmission that prevents movement of
ing. [0003] However, the above-mentioned conventional art
In the case of the shift arm, the shift arm
Actuators such as solenoids to prevent movement
Requires special mechanisms, increasing the number of parts and manual operation
This results in an increase in the weight of the transmission. [0004] The present invention has been made in view of such circumstances.
And avoid increasing the number of parts and weight.
In addition, improved recognizability when selecting the reverse gear,
Incorrect operation of the person establishing the berth gear
Reverse operation in a manual transmission designed to prevent gearing
It is intended to provide a crop prevention structure. [0005] In order to achieve the above object,
In addition, the present invention provides the
Reverse shift piece that enables shift operation in
Multiple shift pieces, including shift arm selection
In manual transmissions that are arranged in parallel in the
The reverse shift piece at the neutral position is
Select operation to the reverse shift piece side
Neutral as possible to contact the shift arm
Position in the shift operation direction than the other shift pieces in the position.
At the neutral position.
The reverse shift piece and the shift
At least one of the mutual contact portions of the arms is provided with the shift door.
From the shift arm in response to the select operation of the
The pressing force to the reverse position side is applied to the berth shift piece.
Inclined to the select operation direction so as to use
It is characterized in that it is formed on a slope. According to such a configuration, the shift arm
The shift is activated when the selector is moved to the reverse select position.
The arm works on the reverse shift piece.
For the reverse against the biasing force toward the neutral position
Pressing the shift piece to the reverse position side,
Operated by receiving the reaction force from the reverse shift piece side
As the working load increases, the vehicle driver intentionally increases
Reverse select shift arm
Unless the shift arm is moved to the position side, the shift arm
It is not possible to select operation to the reverse select position side.
No. Therefore, the vehicle driver establishes the reverse gear
Side can be prevented from being operated accidentally,
In addition, the neutral position of the reverse shift piece is set.
Special parts are not required
Without increasing the number of parts and weight.
it can. [0007] Embodiments of the present invention will be described below.
A description will be given based on an embodiment of the present invention shown in the accompanying drawings. FIGS. 1 to 7 show a first embodiment of the present invention.
FIG. 1 is a longitudinal sectional view of a manual transmission, and FIG.
FIG. 3 is a view showing a change pattern of a girrever, and FIG.
FIG. 4 is a cross-sectional view of a main part of the dynamic transmission, and FIG.
Line 4-4 in FIG. 3 with the switch in the neutral position.
FIG. 5 is a longitudinal cross-sectional view of a main portion of the manual transmission along the reverse direction.
Corresponding to FIG. 4 with toppiece in reverse position
Sectional view, FIG. 6 shows shift arm in neutral position
Shift arm and relative position of each shift piece in the state
FIG. 7 is a diagram showing select operation load characteristics.
You. First, in FIG. 1, the number of forward gears is, for example, six.
Manual transmission M for a vehicle that is both first and one reverse
Of the transmission case 11 extends in the front-rear direction of the vehicle body.
Right Case Half 12 and Left Case Half
13 The engine E is connected via the shifting clutch CL
Connected to one end of the main shaft SM.
The in-shaft SM includes right and left case halves 12,13.
Supported rotatably via ball bearings 14 and 15
Is done. A counter parallel to the main shaft SM
One end in the axial direction of the shaft SC forms the roller bearing 16.
Rotatably supported by the right case half 12 through the
The other end in the axial direction of the counter shaft SC is a ball bearing
17 and rotatably supported by the left case half 13.
You. Incidentally, the counter shaft SC is made of lubricating oil.
Is formed in a cylindrical shape to allow the circulation of
One end of the counter shaft SC has a right case half 12
Oil from the oil passage 18 formed in the inside.
A guide member 19 that guides the inside of the shaft shaft SC is mounted.
In the left case half 13, the countershaft SC
An oil passage 20 communicating the other end is formed,
The inner ring of the ball bearing 17 is
A flange portion sandwiched between a step portion 21 formed on the outer periphery of the other end side
A bolt 22 having 22a is screwed. And the ball
In order to fix the inner ring of bearing 17, lubrication oil flow
Bolt 22 that can be used for the countershaft S
C is screwed into the inner circumference of the other end of C,
Between the other end of the center shaft SC and the left case half 13
The gap is set smaller to help reduce the size of the transmission case 11.
Can be given. In addition, the main shaft SM
Close one end and the other end of the main shaft SM
An oil passage 23 opened at the end is provided coaxially,
Forward the oil from the oil passage 20 in the left case half 13
The guide member 24 leading to the oil passage 23 is provided with a main shaft.
It is attached to the other end of the shaft SM. The transmission clutch CL is connected to the clutch of the engine E.
Clutch wheel 2 fixedly connected to the link shaft
5 and a press arranged on one side of the clutch wheel 25.
Washer plate 26 and facings 27, 27 on both sides
With clutch wheel 25 and pressure play
And between damper 29 through damper 29
Clutch disk 28 connected to main shaft SM
And the clutch wheel 25 and the pressure play
Direction in which the facings 27, 27 are pressed between the
Diaphragm spur biasing pressure plate 26
And a ring 30. Such a shifting clutch CL
Is the normal state of the diaphragm spring 30
Resilient facing 27, 27 clutch wheel 2
5 and the pressure plate 26,
Connect the crankshaft and the main shaft SM
Release the release bear with release fork 31
By moving the ring 32 to the left in FIG.
The connection between the rank shaft and the main shaft SM is cut off
You. The main shaft SM has a main first speed gear.
34 and the main second gear 35 are fixed,
3rd speed main gear 36, 4th speed main gear 37, 5th speed main
Gear 38 and main sixth speed gear 39 are rotatably supported relative to each other.
Be held. On the other hand, the counter shaft SC has a main 1
Mesh with the high-speed gear 34 and the main second-speed gear 35, respectively
1st gear 40 and 2nd gear 41
The main third speed gear 3 is supported so as to be relatively rotatable.
6, the main fourth speed gear 37, the main fifth speed gear 38 and the
Counter third speed gear meshing with in sixth speed gear 39, respectively
42, counter fourth gear 43, counter fifth gear 44 and
And a counter sixth speed gear 45 are fixedly provided. The right and left case halves 12, 13 are provided with
Parallel to the in-shaft SM and the counter shaft SC
Both ends of the reverse idle shaft SR are fixedly supported
The reverse idle shaft SR
The reverse idle gear 46 supported so as to be able to slide
Main reverse gear 47 fixed to in-shaft SM
Supported by the counter shaft SC so that they cannot rotate relative to each other.
It can mesh with the counter reverse gear 48 at the same time. 1-2 mounted on counter shaft SC
The speed synchronization mechanism S1 moves in the axial direction of the counter shaft SC.
Allows movement in a limited range and counter
A sleeve 49 that cannot rotate relative to the shaft SC
1-2 for holding the sleeve 49
Move the speed shift fork 50 left and right in FIG.
Thus, the counter first speed gear 40 and the counter second speed gear
Is connected to the counter shaft SC.
Are combined. That is, when the sleeve 49 is moved rightward in FIG.
The counter first speed gear 40 is connected to the counter shaft SC.
As a result, the first gear is established, and in FIG.
9 is moved to the left, the counter second speed gear 41
2nd speed stage is established by being
You. Thus, the counter reverse gear 48 is
9 are integrally formed. 3-4 speed mounted on the main shaft SM
Synchronous mechanism S2 is restricted in the axial direction of main shaft SM
And the main shuff
Equipped with a sleeve 51 that cannot rotate relative to the SM
And a 3-4 speed system for holding the sleeve 51.
By moving the left fork 52 left and right in FIG.
The main third speed gear 36 and the main fourth speed gear 37 are selected.
One is selected and coupled to the main shaft SM. You
That is, when the sleeve 51 is moved rightward in FIG.
3 is connected to the main shaft SM.
When the speed is established and the sleeve 51 is moved to the left in FIG.
Main fourth speed gear 37 is coupled to main shaft SM.
This establishes the fourth gear. 5-6 speed mounted on the main shaft SM
Synchronous mechanism S3 is restricted in the axial direction of main shaft SM
And the main shuff
Equipped with a sleeve 53 that cannot rotate relative to the SM
And a 5-6 speed system for holding the sleeve 53.
By moving the fork 54 to the left and right in FIG.
And the main fifth speed gear 38 and the main sixth speed gear 39 are selected.
One is selected and coupled to the main shaft SM. You
That is, when the sleeve 53 is moved rightward in FIG.
5 is connected to the main shaft SM.
When the speed is established and the sleeve 53 is moved to the left in FIG.
Main sixth speed gear 39 is coupled to main shaft SM
This establishes the sixth speed. The reverse idle gear 46 has a reverse gear.
It is rotatably held by a fork 55,
Reverse shift from position indicated by solid line to position indicated by chain line
Slip the reverse idle gear 46 with the fork 55
The reverse idle gear 46 is
Inverse gear 47 and counter reverse gear 48
, The reverse gear is established. Thus, the first to sixth speeds and the reverse
When one of the gears is selectively established, the counter system
The rotation of the shaft SC corresponds to the final drive gear 56 and
And the differential 58 through the final driven gear 57
From the differential 58 to the right axle 65 and
And transmitted to the left axle 66. 1st to 6th speed and 1st reverse speed
Change device for selectively establishing one
The bar L is operated according to the operation pattern shown in FIG.
Yes, by operating in the select operation direction indicated by SE,
1-2 speed select position P1, 3-4 speed select position P
2, 5-6 speed select position P3 and reverse select
Moving the change lever L to any of the positions P4
it can. Also, at the 1-2 speed select position P1, the select is performed.
Chain in the shift operation direction SH orthogonal to the operation direction SE
The first speed position D1 and the second speed position D1
Any of the speed positions D2 can be selected, and 3-4 speed
Change lever in shift operation direction SH at select position P2
-By operating L, the third speed position D3 and the fourth speed position
D4 can be selected, 5-6 speed select
The shift lever L in the shift operation direction SH at the
By operating the fifth speed position D5 and the sixth speed position D6,
You can choose either, and even reverse select
The shift lever L in the shift operation direction SH at the
Reverse position R can be selected by operating
You. Referring to FIG. 3 and FIG.
In the upper part of the left case half 13 in
Cover member covering opening 70 provided in half 13
The cover 71 is connected with a guide
A hole 72 is provided. The guide hole 72 has the upper end covered.
Shift selector so as to project upward from bar plate 71
The upper part of the shaft 73 rotates and rotates about its axis.
And the cover member 7
1 and a shift member between the shift select shaft 73
74 is interposed. At the portion projecting upward from the cover member 71,
An engagement hole 75 is provided in the shift select shaft 73.
Then, the select lever 76 is engaged with the engaging hole 75.
The select lever 76 is connected to the shift select shaft 73
Is fixed to a rotating shaft 77 extending in a direction orthogonal to the axis of
The rotating shaft 77 is fixed to the cover member 71.
The casing 78 is rotatably supported. The select lever 76 is a change lever L
In the select operation direction SE (see FIG. 2)
The change lever L is moved to the 1-2 speed selector.
Select position P1, 3-4 speed select position P2, 5-6 speed
Either rect position P3 or reverse select position P4
By moving the lever, the select lever 76 is moved as shown in FIG.
As shown, 1-2 speed select position, 3-4 speed select position
Position, 5-6 speed select position and reverse select position
Pivot to either of Rotation of this select lever 76
, The shift select shaft 73 moves in its axial direction.
Will move linearly. Shift select below the select lever 76
A shift lever 85 is fixed to the shaft 73.
The shift lever 85 shifts the change lever L.
Shift selection in accordance with the operation in the
It rotates together with the shaft 73. Thus, change lever L
Is the 1-2 speed select position P1, 3-4 speed select position
P2, 5-6 speed select position P4 or reverse select
When the shift select shaft 73 is in the
Is in the neutral position, and shift lever L is in first gear
Operate to position D1, third speed position D3 or fifth speed position D5
Shift select shaft 73
From the neutral position in the counterclockwise direction in FIG.
-L is the second speed position D2, the fourth speed position D4, the sixth speed position D
6 or the reverse position R
The rect shaft 73 is moved from the neutral position to the timepiece shown in FIG.
Rotate in the direction. The shift select shaft 73 has an interface
The lock plate 86 is mounted. This interlock
The plate 86 is the axis of the shift select shaft 73.
Shift selectors
A pair of upper and lower side plates 86a, 8 through which the shaft 73 penetrates.
6b and their side plates 86a, 86b, respectively.
A pair of lock claws 86c and 86d are provided.
The shift select shaft 7 is located between the hook claws 86c and 86d.
A slit 87 is formed along a plane perpendicular to the axis 3
You. The interlock plate 86 has a shift
Guide groove 8 extending along the axis of select shaft 73
8 are provided, and the
Stop pin 89 is left case half 1 of mission case 11
Fixed to 3. Therefore, shift select shaft 7
Of the interlock plate 86 in the direction along the axis 3
Although the movement is allowed, the shaft of the shift select shaft 73
The rotation of the interlock plate 86 around the line is prevented.
It is. Both side plates 86 of the interlock plate 86
a, 86b, part of the interlock plate 86
So that the shift arm 90 and the interlocking arm
The memory 91 is interposed. The shift select shaft 73 is
Through the vertical arm 90 and the interlocking arm 91,
The shift arm 90 is shifted by bolts 92
And the interlocking arm 91 is
It is linked to and connected to the arm 90. Shift arm 90 and interlock press
Between the gears 86 on the axis of the shift select shaft 73.
Attached to Interac plate 86 with orthogonal axes
A cylindrical holding cylinder 93 having a bottom and an axis of the holding cylinder 93
Along the holding cylinder 93 so that the
And the ball 94 are urged toward the shift arm 90 side.
Between the holding cylinder 93 and the ball 94
A spring 95 to be contracted and a part of the ball 94 can be accommodated.
3 equally spaced in the circumferential direction of the shift arm 90
It is composed of concave portions 96, 97, 98 provided at locations.
A detent mechanism 99 is provided. With this detent mechanism 99, the seater
Gear 90 and shift select shaft 73
Position, any of the third speed position and the fifth speed position,
Neutral position, 2nd speed position, 4th speed position, 4th speed
Three positions with either position or reverse position
It can be stopped with moderation. The shift arm 90 integrates the drive unit 90a.
The drive unit 90a has an interlock play
The lock 86 is formed between both lock claws 86c and 86d.
It is arranged in the slit 87. Along the axis of shift select shaft 73
1─2 speed shift piece 101, 3─4 speed shift
Top piece 102, shift piece 103 for 5─6 speed and
Reverse shift pieces 104 are arranged in parallel,
The tip of each shift piece 101-104 has a notch 10
1a, 102a, 103a, 104a
So that it is substantially U-shaped.
Drive 90a of the arm 90 with the notches 101a-10
4a can be engaged alternatively.
-With the lock claws 86c and 86d of the lock plate 86 on both sides
It is arranged so as to sandwich it. With particular attention to FIG.
A retainer is provided on the upper surface of the plate 86, that is, the upper surface of the side plate 86a.
124 is in contact with the retainer 124 and
A spring 125 is interposed between the bar members 71. Also sif
To select shaft 73, an interlock plate
An annular step 73a facing the 86 side is provided.
The spring receiving plate 126 received by the step portion 73a and
A spring 127 is interposed between the teners 124. Thus
Shift lever 85 to the neutral position and select lever.
When no operating force is applied to the
The two springs 125 and 12 acting on the shaft 73
By the spring force exerted by 7, the select lever 76
The shift lever L is urged to the 4th gear position,
It is held at the rect position P2. The shift piece 101 for 1─2 speed is
Movable in a direction parallel to the axis of the
Supported by the transmission case 11 and
Shift rod for 1─2 speed equipped with a fork 50
(Not shown) and shift piece 102 for 3/4 speed
Can move in the direction parallel to the axis of the main shaft SM
3 mm while being supported by the transmission case 11
3/4 shift gear with 4-speed shift fork 52
Shift piece 103 for 5─6 speed
Can move in the direction parallel to the axis of the main shaft SM
5 mm while being supported by the transmission case 11
5─6-speed shift gear with 6-speed shift fork 54
Is fixed to the pad 111. [0033] The reverse shift piece 104 is
Moveable in the direction parallel to the axis of the idle shaft SR
Reverse shift supported by the transmission case 11
It is fixed to the trod 112. On the other hand, reverse shift
The fork 55 is the right case half 1 of the mission case 11
2 is provided on the support plate 113 fixed to
Rotatably supported via a shaft 114 parallel to the
And is formed integrally with the reverse shift piece 104.
Drive arm 115 is moved to the reverse shift rod 112
With the reverse shift piece 104
Accordingly, the reverse shift fork 55 is rotationally driven.
Thus, it is engaged with the reverse shift fork 55. The support plate 113 and the reverse shift four
The spring 55 exerts a spring force to separate both ends from each other.
Both ends of the torsion coil spring 117 are engaged,
The drive arm 115 is engaged with the
The reverse shift piece 104 is provided with the torsion coil.
Due to the spring force of the spring 117, the neutral position shown in FIG.
Side and the reverse position side shown in FIG. 5 respectively.
Is done. The reverse shift piece 104
The neutral position is in the right case half of the mission case 11.
Reverse the stopper surface 118 formed on the inner surface of the body 12
Is held by contacting the shift piece 104 for
The reverse position of the reverse shift piece 104 is supported.
Reverse stopper is attached to the stopper pin 119 fixed to the plate 113.
The fork 55 is held by contact and engagement.
It is. Incidentally, the interlocking arm 91 is a shift arm.
Rotate in conjunction with the shift rotation of the 90
Of the shift arm 90 following the shift operation to the base position.
At the initial stage of the shift, when rotating in conjunction with the
While driving the shift piece 102 for the fourth speed by a predetermined amount,
At the end of the shift, return the 3-4 speed shift piece 102 to its original position
To temporarily brake the main shaft SM
This ensures that reverse gear is achieved while preventing gear squeal.
It works to stand up. For this reason, the change lever L is
Brings to the rect position P4 and shifts to the reverse position R side
When operated, by the interlocking arm 91 at the beginning of the shift
The shift piece 102 for the 3rd to 4th speed is shifted by a predetermined amount toward the 4th speed position
Will only be pushed. At this time, shift gear for 3-4 speed
Movement of the gear 102 toward the fourth speed position
For this reason, the interlock plate 86 is shown in FIG.
As described above, the shift arm 90 is
04 at a position where it engages with the notch 104a
A part of the 3-4 speed shift piece 102
A recess 120 is provided. The reverse switch in the neutral position
The shift piece 104 is connected to the reverse shift piece 104.
Adjacent neutral position shift gear for 5-6 speed
Other shift pieces 101 to 103 including
The reverse position along the shift operation direction 122.
Positioned on the opposite side offset by an offset amount ΔL
Is what is done. This offset causes the shift
90 for 5-6 speed along select operation direction 123
Reverse shift piece 10 from shift piece 103 side
When moving to the fourth side, the shift arm 90 is driven.
The portion 90a is the notch 10 of the reverse shift piece 104.
4a will come into contact with the corners. For shift arm 90 and reverse
At least one of the mutual contact portions of the shift piece 104 (this
In both embodiments, the shift arm 90 is
The reverse shift pin is moved from the shift arm 90 in accordance with the movement.
So that the pressing force toward the reverse position acts on the base 104.
And a slope 90 inclined with respect to the select operation direction 123.
b, 104b. Therefore, the shift arm 90 is used for reverse.
To the position where the shift piece 104 engages with the notch 104a.
When the select operation is performed, the slopes 90b, 104b
Shift from the shift arm 90 with the contact of
The reverse shift piece 104 is
A slight pressing force acts on the berth position.
You. At this time, the reverse shift piece 104 is
It is biased toward the neutral position by the il spring 97
And the reverse shift gear 103 from the 5-6 speed shift piece 103 side.
Shift gear that is selectively operated on the shift piece 104 side
The resistance 90 of the predetermined load is applied to the reverse shift piece 10.
You will receive it from the 4 side. Next, the operation of the first embodiment will be described.
Then, the reverse shift piece in the neutral position
104 is river from the 5-6 speed shift piece 103 side
Shift actuated to the gear shift piece 104 side
So that it contacts the drive section 90a of the arm 90,
Than the 5-6 speed shift piece 103 in the neutral position
It is arranged at a position offset in the shift operation direction 122.
The shift arm 90 and the reverse shift
At least one of the mutual contact portions of the
Are both in the neutral position with the torsion coil spring 97
The reverse shift piece 104 urged to the side,
Reverse position from shift arm 90 according to select operation
Select operation direction 1 so that the pressing force acts on the
Formed as slopes 90b and 104b inclined with respect to 23
Have been. Therefore, the shift arm 90 is in the 5th to 6th speed.
At the time of select operation from the position to the reverse select position side
As shown in FIG. 7, the reverse shift piece 104
The shift arm 90 has a predetermined load resistance due to the reaction force from the side.
You will receive resistance. Therefore, the operation load becomes large.
The vehicle driver consciously exerts a large operating force according to
Shift arm 104 from the 5-6th position
Unless you select the berth select position,
Shift arm 90 is selected to reverse select position
It does not work. As a result, when selecting the reverse gear,
Can increase cognition, which allows vehicle drivers
Incorrect operation by the person establishing the reverse gear
And the reverse shift peak
Just set the neutral position of the
No special parts are required and reverse misoperation
In order to prevent operation, increase the number of parts and increase the weight.
Can be avoided. In the first embodiment, the reverse shift
Gear 104 is adjacent to the 5-6 speed shift piece 103
Position, but as in the second embodiment shown in FIG.
And reverse adjacent to the 1-2 speed shift piece 101
Shift piece 104 may be arranged. The embodiment of the present invention has been described above.
The description is not limited to the above-described embodiment.
Various designs without departing from the invention described in the scope
It is possible to make changes. For example, in the above embodiment, the shift arm 9
0 and the reverse shift piece 104
Both were formed on the slopes 90b and 104b.
Only one of the contact points is formed on the slope.
You may. As described above, according to the present invention, vehicle driving
Consciously exerts a large operating force to reset the shift arm.
Unless you select the berth select position,
Shift arm is selected to reverse select position
Will not be recognized when selecting the reverse gear.
Improve intelligence and vehicle driver establishes reverse gear
Side can be prevented from being operated accidentally,
Moreover, it is possible to avoid an increase in the number of parts and weight.
it can.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of a manual transmission according to a first embodiment. FIG. 2 is a diagram showing a change pattern of a change lever. FIG. 3 is a cross-sectional view of a main part of the manual transmission of FIG. 1; 4 is a longitudinal sectional view of a main part of the manual transmission, taken along line 4-4 in FIG. 3, in a state where the reverse shift piece is in a neutral position. 5 is a cross-sectional view corresponding to FIG. 4 in a state where the reverse shift piece is at a reverse position. FIG. 6 is a diagram showing a relative position of the shift arm and each shift piece in a state where the shift arm is in a neutral position. FIG. 7 is a diagram showing select operation load characteristics. FIG. 8 is a view corresponding to FIG. 6 of the second embodiment. [Description of Signs] 90 shift arms 90b, 104b slopes 101, 102, 103 shift piece 104 reverse shift piece 122 shift operation direction 123 select operation direction M: Manual transmission

Claims (1)

Claims: 1. A plurality of shift pieces (101 to 10) including a reverse shift piece (104) enabling a shift operation between a reverse position and a neutral position.
4) is the select operation direction (1) of the shift arm (90).
23) In the manual transmission arranged in parallel with the reverse shift piece (10) in the neutral position.
4) is capable of contacting the shift arm (90) which is selectively operated to the reverse shift piece (104) side, thereby performing a shift operation more than the other shift pieces (101 to 103) in the neutral position. Direction (12
The reverse shift piece (10) which is arranged at a position offset in (2) and urged toward the neutral position side.
4) and at least one of the mutual contact portions of the shift arm (90) is moved from the shift arm (90) to the reverse shift piece (104) to the reverse position side in response to the select operation of the shift arm (90). Reverse erroneous operation prevention structure in a manual transmission, characterized in that it is formed on a slope (104b, 90b) that is inclined with respect to the select operation direction (123) so that the pressing force acts.