JPS592579Y2 - Transmission shift operation mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a speed change operation mechanism for a transmission, and provides a reverse check mechanism in a speed change operation mechanism in which an interlock mechanism is provided in a portion of a shift lever.

Various reverse check mechanisms have been developed for transmissions with a shift pattern in which a reverse gear and a certain forward gear are obtained by shifting the same shifter rail. Although disclosed in , the subject of the present invention is a transmission in which an interlock arm is provided as part of a shift lever so as to move together with the shift lever in the select direction.
This invention is a further improvement on the above-mentioned prior art, and the details of the present invention will be explained below with reference to the accompanying drawings.

Fig. 1 and Fig. 2 show a speed change operation mechanism in which an interlock mechanism is provided in a part of the shift lever.
2 is a 3-4 shifter rail that shifts between 3rd and 4th speeds, 3
shows the 5-R shifter rail that shifts between 5th speed and reverse.

Shifter arms 4, 5 and 6 are fixed to each of the shifter rails 1, 2 and 3, respectively, and each of these engaging portions 4a,
A shifter lever 7 that selectively engages with the shifter rails 5a and 6a and slides each shifter rail in the axial direction is rotatably and slidably attached to a shifter lever shaft 8 supported by the transmission case.

An interlock arm 9 is attached to the shifter lever shaft 8 so as to sandwich the shifter lever 7 so that it cannot rotate but can slide.

An operation shaft 10 supported by the mission case so as to be rotatable (in the direction of arrow A) and slidable (in the direction of arrow B)
is provided with a select arm 11 and a shift I arm 12, the select arm 11 engages with the retaining groove 9c of the interlock arm 9, and the shift arm 12 engages with one end 7b of the shifter lever 7. It matches.

In the above configuration, the operating shaft 10 is
The arm 11 slides the interlock arm 9 and the shifter lever 7 held thereon along the shaft 8 by rotating as shown in FIG. By performing a so-called select operation to engage one of the engaging portions and slidingly moving the operating shaft 10 in the direction of arrow B, the arm 12 rotates the shifter lever 7, and the engaging end portion 7a is engaged. A so-called shift operation is performed in which the shifter rail is moved in the axial direction via the shifter arm.

During the above selection operation, the engaging portions 9a and 9b of the interlock arm 9 engage with the retaining portions of the shifter arms other than the shifter arm engaged with the shifter lever 7, as shown in FIG. movement in the shift direction is restricted.

A shaft 13a that slides together with the interlock arm 9 during the selection operation, and a ball 1 that fits into the groove of the shaft 13a.
3b, a spring 13c that presses and supports the ball 13b;
A select operation moderation tolerance mechanism 13 consisting of a select operation moderation tolerance mechanism 13, and a moderation tolerance mechanism 14 (some not shown) during shift operation of each shifter rail 1.2.3 are provided, so that accurate operation can be performed. It has become.

In the shift operation mechanism as described above, a certain forward gear, that is, 5
Since speed and reverse are performed by the same shifter rail, that is, the 5-R shifter rail 3, when shifting down from 5th gear to a neutral forward gear, such as 4th gear, the 5-R shifter rail 3 may accidentally shift to the neutral point. This may cause the gear to shift into reverse, causing damage to the gear or other accidents.

The present invention provides a reverse check mechanism to prevent such erroneous reverse operation.
The embodiment shown in the figure will be explained.

In the present invention, as shown in Fig. 3, the 5-R shifter rail 3
From the retaining part 6a of the shifter arm 6 fixed to the shifter arm 6 in the reverse shift direction, the front side of the 3-4 shifter rail facing the shifter arm 5 is cut out at a predetermined height to form a cutout part 6b. The end surface 5b of the retaining portion 5a of the shifter arm 5 adjacent to the shifter arm 6 on the side opposite to the notch 6b of the shifter arm 6 is made to protrude in the direction of the notch 6b to form a stopper portion 5c, and the shifter lever 7 interlock arm 9 installed to sandwich the
Of the engaging parts 9a and 9b, the surface facing the shifter lever 7 of the retaining part 9b on the side that engages with the retaining part 6a of the shifter arm 6 of the 5R shifter rail 3 is cut out over a predetermined range in the reverse shift direction. This constitutes a notch 9b'.

In the above configuration, the retaining end 7a of the shifter lever 7 is
-2 In the state shown in FIG. 3A in which the interlock arm 9 is engaged with the engagement portion 4a of the shifter arm 4 of the shifter rail 1, the engagement portion 9b of the interlock arm 9 is engaged with the engagement portion 5a, 6a of the other shifter arms 5 and 6.
As described above, the shifter rails 2 and 3 are engaged with each other to lock the movement of the shifter rails 2 and 3 in the shift direction when the 1-2 shifter rail 1 is shifted by the operation of the shifter lever 7.

The engaging end 7a of the shifter lever 7 is 3-4 shifter rail 2
When the opening surface is engaged with the shifter arm 5, the engaging portions 9a and 9b of the ink lock arm 9 engage with the engaging portions 4a and 6a of the other shifter arms 4 and 6, respectively, and these shifter rails 1 and 3 lock.

In this state, when the shifter arm 5 is shifted to the third speed by operating the shifter lever 7, the stopper portion 5c protrudingly formed on the far side end surface 5b of the engaging portion 5a of the shifter arm 5 is a retaining portion of the shifter arm 6 of the next stage. A notch 9b' is provided in the interlock arm retaining part 9b of the interlock arm 9 to prevent the interlock arm retaining part 9b engaged with the interlock arm 6a from coming into contact with the interlock arm retaining part 9b.

In this case, by appropriately setting the width l of the notch 9b', the stopper portion 5c can
corresponds to the edge 9b'' of the notch 9b', and can function as an overshift prevention stopper.

When selecting the 5th speed, as shown in FIG. 9a is the engaging portion 4a, 5 of the other shifter arms 4, 5.
In this state, the retaining end 7a of the shifter lever is engaged with the shifter arm 5 whose reverse operation direction end surface 7a' is locked by the engaging part 9a of the interlock arm 9. It faces the collar part 5C, and 5
Although a shift operation can be performed in the speed direction, the end surface 7a' hits the stopper portion 5C and is restrained in the reverse direction, making reverse operation impossible.

When shifting to Novverse, select from the state shown in Fig. 3 further upwards in the figure, and move to a position where one end face 7a' of the retaining end 7a of the shifter lever 7 is out of the stopper part 5C as shown in the second page. You can perform a reverse shift by operating the shifter to the left in the diagram.

The shift pattern according to the present invention as described above is as shown in Fig. 4, and the 5th gear select position and the reverse R select position are slightly shifted from each other, and each select position is shown in Fig. 2 above. The moderation tolerance mechanism 13 is configured to allow moderation to be distinguished.

Although the embodiment described above shows a five-speed transmission, the present invention is not limited to this, but can be applied to any transmission with a shift pattern in which a reverse gear and a certain forward gear are obtained by shifting the same shifter rail. Needless to say.

As described above, according to the present invention, in a transmission having a shift pattern in which a reverse gear and a certain forward gear are obtained by shifting the same shifter rail, and an interlock mechanism is provided in a part of the shift lever, the reverse gear and a certain forward gear are When the sick lever is engaged with the shifter rail engaging part of the shifter rail for the reverse gear and the shifter rail of the shifter rail adjacent to the shifter rail for the forward gear and the sick lever is attempted to be operated in the reverse gear direction, the sick lever hits the engaging part of the shifter rail adjacent to the shifter rail for the gear. A stopper portion for restraining reverse gear operation is formed protrudingly, and shifting to reverse gear is performed after operating the Sereno 1 in one direction to a position that avoids the stopper portion while the shifter lever is engaged with the retaining portion. The interlock arm engages with the retaining portion of the shifter rail for the reverse gear and the forward gear when the shifter lever engages the engaging portion of the shifter rail adjacent to the shifter rail for the reverse gear and the forward gear; The present invention is characterized in that a notch is provided so that the stopper provided on the shifter rail does not come into contact with the interlock arm during a shift operation of the adjacent shifter rail. Accidents such as accidentally shifting to reverse gear when operating the gear while driving in the gear are completely prevented, and gear shifts to other forward gears can be performed accurately without interfering with gear shifting operations. Combined with its simple structure and ease of manufacture, it can bring great practical value.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a plan view and a cross-sectional view taken along line X-X showing the main parts of a transmission to which the present invention is applied, and FIG. 3A. Figures 1, 2 and 2 are front views of the engaging portions of the shifter arm, sick lever and interlock arm, showing an embodiment of the present invention;
Each selection state of 1st-2nd speed, 3rd-4th speed, 5th speed, and reverse is shown. FIG. 4 is a diagram showing a shift pattern in a part of the change lever according to the present invention. 1...1-2 shifter rail, 2...3-4 shifter rail, 3...5-R shifter rail, 4.5.6...
Shifter arm, 4a, 5a, fia...engaging portion, 5C...stopper portion, 6b...notch portion, 7...
...Shifter lever, 8...Shifter lever shaft, 9
...Interlock arm, 9a, 9b...engaging portion,
9b'...Notch, 9b''...Edge, 10...
operating shaft.

Claims (2)

[Scope of utility model registration request] (1) In a transmission in which a reverse gear and a certain forward gear are in a shift pattern obtained by shifting the same shifter rail, and an interlock arm is provided as a part of the shift lever so as to move together with the shift lever in the select direction, When the shifter lever is engaged with the engaging part of the shifter rail adjacent to a certain forward gear shifter rail, and the shifter lever is engaged with the retaining part of the shifter rail for reverse gear and a certain forward gear shifter rail, and an attempt is made to shift in the reverse gear direction, the shifter lever hits and the reverse gear operation is performed. In addition, when the shifter lever engages with the retaining part of the shifter rail adjacent to the shifter rail for the reverse gear and the forward gear, the stopper part is formed to project and engage the retainer part of the shifter rail for the reverse gear and the forward gear. A shift operation mechanism for a transmission, characterized in that a notch is formed in a mating ink lock arm so that a stopper provided on the adjacent shifter rail does not interfere with the stopper. (2) A stopper portion protruding from the end edge of the notch formed in the interlock arm and the retaining portion of the shifter rail adjacent to the shifter rail for the forward gear that is the reverse gear is connected to the shifter rail for the forward gear that is the reverse gear. A shift operation mechanism for a transmission according to claim 1, wherein the shift operation mechanism for a transmission according to claim 1 is configured to come into contact with a shifter rail adjacent to the shifter rail at the time of completion of a one-way shift operation to function as an overshift prevention stopper.