JP3475711B2 - Operating device for manual transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a manual transmission operation device that is suitable for use in a manual transmission mounted on a small-sized truck or the like because of its reduced number of component parts and mounting processes through its simplified structure. SOLUTION: A manual transmission operation device has a reverse mis-shift preventing mechanism including a resistance plate 17 adapted to turn by a claw 16 on a gearshift lever 11 contacting therewith while the lever 11 is shifted from the neutral position into the 5th gear to permit the movement of the lever 11 to the 5th gear as well as adapted to prevent the movement of the lever 11 being shifted from the 5th gear to the reverse gear. The preventing mechanism including the lever 11 and the plate 17, and a control shaft 10 are held in an upper case 2a at the upper portion of the transmission case that encloses a transmission gear train including the above gears.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for a manual transmission for an automobile.

[0002]

2. Description of the Related Art In a manual transmission for an automobile, a gear train for achieving a gear shift, that is, a gear stage is changed by operating a shift lever provided in a driver's seat. The operating force of the shift lever is transmitted to the operating device of the transmission directly or via a rod or a cable, and the shift fork slides the transmission gear or synchronizer sleeve on the gear shaft in the transmission to perform gear shifting. Be seen.

As a shift pattern, an H type is generally adopted in passenger cars and the like, and a select operation for selecting a shift fork corresponding to two shift speeds and a shift for axially driving the selected shift fork. Gear shifting is executed by the operation. For example, in a transmission with five forward gears and one reverse gear, the driver swings the shift lever to the left and right to select one of the select positions from 1, 2, 3, 4, and 5R, and then Swing back and forth to shift to a desired gear.

By the way, when the vehicle speed decreases or overtaking acceleration is performed while traveling in the fifth gear, the driver shifts to the fourth gear. At this time, if the driver is immature, pull the shift lever as it is,
There was a risk of mis-shifting from fifth gear to reverse (R). If such an operation is performed, an impact may be applied to the transmission gear and the shift fork, and wear or deformation of these parts may occur.

In recent years, there has been a demand for small trucks such as home delivery vehicles to be operated as if they were passenger cars. Therefore, a shift pattern similar to that of passenger cars has been realized. That is, as described above, the fifth gear and the reverse gear are set on the same straight line. Therefore, even in a small truck adopting such a shift pattern, a reverse misshift prevention mechanism provided in a passenger car or the like is required. By the way, in a truck, the first gear (which is not normally used) and the reverse gear are set on the same straight line, so even if a misshift is made from the first gear to the reverse (R) gear, the gear ratio is Both of them are low, and there is no bad influence, so that the reverse misshift prevention mechanism is not provided at present.

As the reverse misshift prevention mechanism,
Conventionally, there is one as shown in FIG. 7 and FIG.
(See Japanese Patent Publication No. 224933).

According to this, the control shaft 10
When 0 rotates in the neutral direction, the upper protrusion 101 is pushed up by the upper end surface 103 of the stopper bracket 102, and the stopper plate 104 rotates counterclockwise as indicated by the arrow. Then, the lower protrusion 105 of the stopper plate 104 is attached to the side surface 10 of the stopper bracket 102.
6, the stopper plate 104 moves to the left side together with the control shaft 100 due to the reaction force. Therefore, the control finger 107 integrated with the control shaft 100 does not move to the backward (R) stage side but rotates in the neutral direction,
The interlock plate 108 and the interlock plate 108 move quickly toward the third and fourth stage shift lugs 109. In FIG. 7, reference numeral 110 denotes a 5 · R shift lug, 111 denotes a 1 · 2 shift lug, and 112 denotes an upper case accommodating these reverse miss shift prevention mechanisms.

[0008]

However, in the conventional reverse misshift prevention mechanism described above, the control finger 107 and the interlock plate 10 are provided on the control shaft 100 in the upper case 112.
8 and the stopper plate 104, which is the main member of the reverse misshift prevention mechanism, are provided separately,
The control shaft 100 becomes longer. Along with this, it is necessary to lengthen the width direction of the upper case 112, which increases the weight in addition to the increase in the number of parts and the number of assembling steps. However, there was a problem that it was not very useful.

Therefore, an object of the present invention is to provide an effective manual transmission operating device which can be applied to a manual transmission such as a small truck by reducing the number of parts and assembling steps by simplifying the structure. is there.

[0010]

In order to achieve the above object, an operating device for a manual transmission according to claim 1 of the present invention comprises:
A first shift position for selecting a forward shift speed and a second shift position for selecting a reverse shift speed on the same straight line with a select position sandwiched between a select operation and a shift operation of a shift lever. In a manual transmission in which a shift position is set, a control shaft that rotates by a shift operation of the shift lever, and a control shaft that is loosely fitted on the control shaft and that rotates together with the control shaft by a shift operation of the shift lever A shift slide lever that slides on the control shaft by a lever select operation to change the meshing state of the transmission gear train, and a shift slide lever of the shift slide lever when the shift slide lever is moved from the neutral position to the first shift position side. The first shift of the shift slide lever is rotated by abutting. A resistance plate that allows movement to the position and prevents movement of the shift slide lever to the second shift position when the shift slide lever is moved from the first shift position toward the second shift position. Reverse misshift prevention mechanism and a control unit formed integrally with the shift slide lever.
Equipped with a trawl finger, the control finger
On the side surface of the
The control shaft, the shift slide lever, and the reverse misshift prevention mechanism, which are formed on the body, are housed in a selector case arranged above the transmission case housing the transmission gear train.

According to this, since the reverse misshift prevention mechanism can be achieved by bringing the shift slide lever into contact with the resistance plate, the number of parts on the control shaft can be reduced, and the number of assembly steps and weight can be reduced. it can.

According to a second aspect of the present invention, in the operating device for a manual transmission, the shift slide lever includes a main body portion for changing the meshing state of the transmission gear train, and the main body portion on a side surface of the main body portion. It is characterized in that it has a smaller claw portion that comes into contact with the resistance plate, and that the main body portion and the claw portion are forged and then only the claw portion is ground.

According to this, only the claw portion that abuts on the resistance plate needs to be ground, so that the surface roughness of the claw portion is reduced and a good feeling is maintained, while the grinding processing area is small.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION An operating device for a manual transmission according to the present invention will be described below in detail with reference to the accompanying drawings.

[Embodiment] FIG. 1 is a bottom view of a selector upper case incorporating a reverse misshift prevention mechanism of an operating device according to the present invention, and FIGS. 2 to 4 show different operation states of the reverse misshift prevention mechanism. FIG. 5 is a bottom view of each selector upper case, FIG. 5 is a cross-sectional view of FIG. 1, and FIG. 6 is a perspective view showing a state in which a manual transmission to which a reverse misshift prevention mechanism according to the present invention is applied are mounted on a vehicle body.

As shown in FIG. 6, a selector case 2 is disposed above the transmission case 1 accommodating the transmission gear train, and is connected to a shift slide lever (selector), which will be described later, accommodated in the selector case 2. The select lever 3 is rotatably supported by the selector case 2, and a cross shaft 4 which is also accommodated in the selector case 2 and is connected to a control shaft described later is rotatably supported by the vehicle body frame 5. .

A select rod 6 is connected to the select lever 3 and a shift rod 7 is connected to the cross shaft 4, and both the rods 6 and 7 are connected to a shift lever in a driver's seat through a cable or the like (not shown). Each is connected.

Upper case 2 of the selector case 2
As shown in FIGS. 1 and 5, the control shaft 10 is horizontally rotatably mounted on a, and the outer protruding end portion 10a thereof is connected to the cross shaft 4. The shift slide lever 11 described above is spline-fitted to the control shaft 10, and the circular tip portion 3a of the bell crank-shaped select rod 3 is slidably fitted to the cam groove 12 formed in the lower surface portion thereof. ing.

Therefore, when the select lever 3 is rotated by the select operation of the shift lever, the shift slide lever 11 slides on the control shaft 10 (that is, moves in the select direction), and the shift operation of the shift lever is performed. Then, when the control shaft 10 rotates via the cross shaft 4, the shift slide lever 11 also rotates integrally with the control shaft 10.

A control finger 13 is integrally formed on the shift slide lever 11, and the control finger 13 moves in the axial direction of the control shaft 10 so that the first and second shift lugs 14a, the third and fourth shift lugs 14b and 5 are formed. Engage with any of the R shift lugs 14c. When the control finger 13 rotates, the shift lugs 14a, 14b,
14c is one of the shift rails 15a,
It moves to the left and right in FIG. 5 together with 15b and 15c, and a desired gear shift is executed via a shift fork (not shown). The shift rails 15a, 15b, 15c are slidably supported by the boss portion of the lower case 2b.

Further, the shift slide lever 11 is integrally formed with a claw portion 16 formed on a side surface of a main body portion on which the control finger 13 is formed and smaller than the main body portion and contacting a resistance plate described later. . After the main body portion and the claw portion 16 are forged, the claw portion 16
Only by grinding, the surface roughness is reduced.

On the lower surface of the upper case 2a, the above-mentioned resistance plate 17 which constitutes a reverse misshift prevention mechanism together with the claw portion 16 is rotatably attached by a bolt 18 via a washer 19. In the illustrated example, a large diameter portion 18a is formed on the head side of the bolt 18, and the resistance plate 17 is rotatable by setting the plate thickness dimension of the resistance plate 17 smaller than the length dimension of the large diameter portion 18a. It has become. Further, it is preferable to apply an adhesive to the screw holes 20 of the upper case 2a to prevent the bolts 18 from loosening.

The resistance plate 17 is constantly urged by the return spring 21 to the initial position (5th gear side as the first shift position). The bolt insertion hole 22 of the resistance plate 17 allows the claw portion 16 to move when the claw portion 16 is moved from the fifth speed side to the retracted (R) side as the second shift position. A long hole is formed so as to allow the shift slide lever 11 to move to the retreat (R) step side to a position where it comes into contact with the plate 17 and the shift slide lever 11 can move in the select direction. Incidentally, reference numeral 23 in the figure denotes a return spring which constantly urges the shift slide lever 11 to the neutral position.

The operation of this embodiment will be described below. Shift slide lever 11 from the neutral position shown in FIG.
When the (control finger 13) slides on the control shaft 10 by the rotation of the select lever 3 against the urging force of the return spring 23 toward the 5R stage,
As shown in FIG. 2, the side surface 16a of the claw portion 16 abuts on the side surface 17a of the resistance plate 17, and the resistance plate 17 is rotated around the bolt 18 against the biasing force of the return spring 21. It becomes the state of.

In this state, slippage occurs between the side surfaces 16a and 17a, so that the control shaft 10 can be rotated to shift to the fifth speed or retracted (R).
It is also possible to shift to the next stage (see FIG. 4).

Here, if it is assumed that the gear is shifted to the fifth gear and then the shift from the fifth gear side to the reverse (R) stage is attempted, the resistance plate 17 causes the biasing force of the return spring 21 as shown in FIG. The front surface 16b of the claw portion 16 abuts on the front surface 17b of the resistance plate 17, so that the resistance plate 1
7 against the biasing force of the return spring 21
A predetermined amount of play (a distance at which the control finger 13 can return to the select position) is moved to the backward (R) step side,
Further movement of the claw portion 16 is prevented by the contact between the front surfaces 16b and 17b.

Thus, for example, in a small truck equipped with a manual transmission having the same shift pattern as that of a passenger car as described above, even if a shift operation is performed in the same sense as a passenger car, the vehicle moves backward from the fifth speed (R). Shifting to the gear is reliably prevented, and wear and deformation of the transmission gear and shift fork are avoided in advance.

In the present embodiment, the resistance plate 17 is directly attached to the upper case 2a by a single bolt 18 and is rotatably supported, so that the number of parts and the number of attachment steps are greatly reduced.

Further, since the bolt insertion hole 22 of the resistance plate 17 is formed as a long hole, the function of attaching the resistance plate 17 to the upper case 2a and the movement of the resistance plate 17 from the fifth speed side to the selectable movement possible position. And a function that allows
The structure can be simplified and it can be effectively applied to transmissions such as small trucks.

Further, the claw portion 1 of the shift slide lever 11
Since the reverse misshift prevention mechanism can be achieved by bringing 6 into contact with the resistance plate 17, the number of parts on the control shaft 10 can be reduced, the number of assembly steps and weight can be reduced, and the control shaft 10 can be shortened. As a result, the size of the upper case 2a can be reduced. Therefore, the mountability of the transmission is improved, and as described above, the transmission can be effectively applied to a transmission such as a small truck.

Further, since only the claw portion 16 abutting on the resistance plate 17 needs to be ground, the surface roughness of the claw portion 16 is reduced to maintain a good feeling.
The grinding area is small.

Needless to say, the present invention is not limited to the above embodiments, and various changes can be made without departing from the gist of the present invention.

[0033]

As described above, according to the first aspect of the invention, a desired gear is selected in conjunction with the shift lever's select operation and shift operation, and the forward shift is performed on the same straight line across the select position. In a manual transmission in which a first shift position for gear selection and a second shift position for reverse gear selection are set, a control shaft rotated by a shift operation of the shift lever and a control shaft A shift slide lever that is fitted and rotates together with the control shaft by a shift operation of the shift lever, and slides on the control shaft by a select operation of the shift lever to change the meshed state of the transmission gear train; Of the shift slide lever is moved from the neutral position to the first shift position side. When the shift slide lever is moved from the first shift position toward the second shift position, the second shift position is allowed to rotate by contacting to allow the shift slide lever to move to the first shift position. And a reverse misshift prevention mechanism having a resistance plate that prevents the shift slide lever from moving toward and away from the shift slide lever, and is integrally formed with the shift slide lever.
Equipped with a control finger.
Claw part that contacts the above resistance plate on the side of the
Since the control shaft, the shift slide lever, and the reverse misshift prevention mechanism are housed in a selector case disposed above the transmission case housing the transmission gear train, the shift slide lever is formed integrally. Since the reverse misshift prevention mechanism can be achieved by bringing the control plate into contact with the resistance plate, the number of parts on the control shaft can be reduced, the number of assembling steps and weight can be reduced, and the selector shaft can be shortened by shortening the control shaft. Can be miniaturized. Therefore, the mountability of the transmission is improved, and the transmission can be effectively applied to a transmission such as a small truck.

According to a second aspect of the present invention, the shift slide lever is formed on a side surface of the main body portion smaller than the main body portion, the main body portion changing the meshing state of the transmission gear train, and the resistance. Since the main body portion and the pawl portion are forged and only the pawl portion is ground, the pawl portion contacting the resistance plate only needs to be ground. While reducing the surface roughness and maintaining a good feeling, the grinding area is small.

[Brief description of drawings]

FIG. 1 is a bottom view of a selector upper case incorporating a reverse misshift prevention mechanism according to the present invention.

FIG. 2 is a bottom view of the selector upper case showing a different operation state of the reverse misshift prevention mechanism.

FIG. 3 is a bottom view of a selector upper case showing a different operation state of the reverse misshift prevention mechanism.

FIG. 4 is a bottom view of the selector upper case showing a different operation state of the reverse misshift prevention mechanism.

5 is a cross-sectional view of FIG.

FIG. 6 is a perspective view showing a state where a manual transmission to which a reverse misshift prevention mechanism according to the present invention is applied is mounted on a vehicle body.

FIG. 7 is a front sectional view of a conventional reverse misshift prevention mechanism.

FIG. 8 is a side sectional view of FIG.

[Explanation of symbols]

2 selector case 2a upper case 3 Select lever 10 control shaft 11 Shift slide lever 13 control fingers 16 claws 17 Resistance Plate 18 volt 21 Return spring 22 Bolt insertion hole

─────────────────────────────────────────────────── ───Continued from the front page (56) Bibliography Flat 5-57512 (JP, U) Real development Sho 57-153026 (JP, U) Real development Sho 63-48055 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F16H 63/34 B60K 20/00-20/08

Claims (2)

(57) [Claims] 1. A first shift position and a reverse shift stage for selecting a desired shift stage in conjunction with a select operation and a shift operation of a shift lever and for selecting a forward shift stage on the same straight line across a select position. In a manual transmission in which a second shift position for use is set, a control shaft that is rotated by a shift operation of the shift lever, and a control shaft that is loosely fitted to the control shaft and is rotated together with the control shaft by a shift operation of the shift lever. A shift slide lever that moves and slides on the control shaft by a select operation of the shift lever to change the meshing state of the transmission gear train, and when the shift slide lever is moved from the neutral position to the first shift position side The shift slide lever is rotated by contact with the shift slide lever. Is allowed to move to the first shift position, and the shift slide lever moves from the first shift position to the second shift position.
And reverse miss shift preventing mechanism having a resistance plate that prevents the movement of the shift slide lever of the to the second shift position when moved to the shift position direction, are formed integrally with the shift slide lever control
And control finger on the side of the control finger.
A claw portion that abuts against the speed is integrally formed, and the control shaft, the shift slide lever, and the reverse misshift prevention mechanism are housed in a selector case arranged above the transmission case housing the transmission gear train. An operating device for a manual transmission, which is characterized in that 2. The shift slide lever according to claim 1, wherein the shift slide lever is configured to change a meshing state of the transmission gear train, and is formed on a side surface of the main body to be smaller than the main body and to come into contact with the resistance plate. An operating device for a manual transmission, comprising: a claw part, wherein the main body part and the claw part are forged and only the claw part is ground.