JPS6211225Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a gear shift operation device for a gear transmission of an automobile, with the intention of improving the shift operation feeling.

Conventionally, a shift operating device has a change lever that is fitted into a change lever shaft supported by a transmission case, slides in the axial direction to select a shift fork, and rotates around the axis to shift the shift fork. In the above, there was a problem in that the shift lever rotated in the shift direction and came into contact with the shift fork during the select operation, which worsened the shift operation feel.

Additionally, a neutral switch that detects the neutral state is generally attached to the change lever in order to control the engine, but as mentioned above, the change lever may rotate in the shift direction when the select operation is performed. This affected the detection accuracy of the above switch. For example, Jitsukaiaki
See JP-A No. 51-122270, JP-A-53-160578, and JP-A-53-163474.

This invention was made in order to solve the above-mentioned conventional problems, and a change lever shaft supported by a transmission case is equipped with a change lever shaft that is rotatable around the axis of the shaft and slidable in the axial direction. The shift operating device is configured to support a lever, to select one of a plurality of shift forks by sliding the change lever in an axial direction, and to shift the shift fork by rotating the change lever about the axis. The lever is provided with a neutral lever, and a neutral switch that engages with the neutral lever when the change lever is in the neutral position is fixed to the transmission case. Correspondingly, a guide groove extending parallel to the axis of the change lever shaft is provided, and the neutral switch is elastically pressed into engagement with the guide groove of the neutral lever.
An engaging element is provided in the guide groove that can be freely engaged and disengaged by rotation of the neutral lever, and when in neutral, the guide groove and the engaging element are engaged to further improve the selection operation feeling and detect the neutral switch. This was devised to improve accuracy.

Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, the speed change operating device has an output shaft 1 supporting gears 3, . . . , 3 through bearings 2, . ..., 3 connects the clutch hub sleeve 5 of the synchronizer mechanism 4 to the shift shaft 6 above the output shaft 1.
The shift fork 7 supported by the shift fork 7 is slid in the axial direction to perform switching.

The shift fork 7 includes a shift fork 7a for 1st-2nd speed, a shift fork 7b for 3rd-4th speed, and a shift fork 7b for 3rd-4th speed.
It consists of a shift fork 7c for speed-R.

In the orthogonal direction above the shift shaft 6, a change lever shaft 8 having axial engagement teeth formed on its outer periphery is rotatably supported by a transmission case 9, and one end of the change lever shaft 8 is It is held in the transmission case 9 with a pin 10 to prevent it from coming off, and a universal joint 11 is welded and fixed to the other end to connect the shift shaft 12.

The change lever shaft 8 is fitted with a base 14 of the change lever 13, which forms engaged teeth that mesh with the engaging teeth on the inner circumference thereof, so as to be slidable in the axial direction. , the recess 15 (15) of the shift fork 7 (7a to 7c)
a to 15c).

A cam 17 formed with the same engaged teeth as the base 14 is fitted into the change lever shaft 8, and a ball 19 provided at the upper part of the transmission case 9 and biased by a spring 18 is brought into contact with the cam 17. On the other hand,
A spring 20 is compressed between the cam 17 and the transmission case 9, and the change lever 13 is attached together with the cam 17.
is energized in the axial direction.

The change lever 13 is held at the select position by a select arm 22 that fits into a recess 21 provided in the base 14, and the spring 20 holds the change lever 13 at the neutral position at the 3rd-4th gear when in neutral.

The select arm 22 is fixed to the lower part of a select lever shaft 24 supported by the transmission case 9 together with a stopper plate 23 that restricts shift forks other than the shift fork of the selected gear stage from operating in the shifting direction. , a manually operated select lever 2 is mounted on the upper part of the select lever shaft 24.
Fix 5.

In the above configuration, when the select lever 25 is manually operated as shown in FIG. ) and when the shift shaft 12 is manually operated, the change lever 13 rotates together with the change lever shaft 8 to shift the shift fork 7 (7a to 7c).

Note that the select lever 25 and the shift shaft 12 may have a single operation structure.

On the other hand, as shown in FIGS. 4 and 5, a neutral lever 26 having a wide width in the selection direction is fixed to the base 14 of the change lever 13, and a neutral lever 26 is provided at the tip of the neutral lever 26. Corresponding to the selection direction as shown in Figure 5,
A longitudinal semicircular guide groove 27 parallel to the axis of the change lever shaft 8 is provided, and a neutral switch 28 is attached to the transmission case 9 facing the guide groove 27 of the neutral lever 26 in the neutral position. The hemispherical engaging element 29 at the tip of the switch 28 is engaged with the guide groove 27 without play.

As shown in FIG.
A fixed contact 32 is provided at the bottom of the case 33 and faces the movable contact 31 attached to the engager 29, and when the engager 29 protrudes, the contacts 31, 32
When the engaging element 29 is engaged with the guide groove 27, the contacts 31 and 32 come into contact and turn on.

Therefore, if the speed change operation device is configured as described above, when the change lever 13 is in the neutral position, the guide groove 27 of the neutral lever 26 of the change lever 13 will engage with the engager 29 of the neutral switch 28. It matches.

In this state, when the change lever 13 is operated in the select direction by the select lever 25, the guide groove 27 of the neutral lever 26 is guided by the engaging element 29 and moves.

At this time, the neutral lever 26, that is, the change lever 13, is held in the neutral position without rattling, so that the change lever 13 moves into the recess 15 (15a to 15b) of the shift fork 7.
Since the gear does not come into contact with the gear, the shift operation feels better.

Then, shift shaft 12 at the select position.
When the change lever 13 is shifted in the shift direction by operating the change lever shaft 8, the guide groove 27 of the neutral lever 26 is disengaged from the engagement member 29, and the change lever 1
3, the shift forks 7 (7a to 7c) are shifted.

At this time, the force that separates the guide groove 27 of the neutral lever 26 from the engager 29 acts as a moderation, so that the shift operation feeling is further improved.

It goes without saying that the engaging member 29 does not need to have the switch means as described above.

As is clear from the above description, this invention provides a neutral lever on the change lever, fixes a neutral switch that engages with the neutral lever in the neutral position to the transmission case, and attaches the neutral lever to the neutral lever. Since we have provided a guide groove that corresponds to the select direction and extends parallel to the axis of the change lever shaft, there is no wobbling of the change lever in the shift direction, and the neutral position can be accurately maintained during select operation, allowing the change lever to move toward the shift fork. Since contact is prevented, the shift operation feels better.

Furthermore, since the change lever does not shake during the selection operation, the detection accuracy of the neutral switch can be improved.

Furthermore, since a releasable engager is provided in the guide groove formed in the neutral lever, the engagement and disengagement operation is controlled and the shift operation feeling is further improved.

[Brief explanation of the drawing]

Figure 1 is a side view of the gear shift operating device, Figure 2 is the
Figure 3 is a plan view showing the selection and shift procedures, Figure 4 is a plan view of the neutral lever and neutral switch, Figure 5 is a cross-sectional view of the guide groove and engagement element, Figure 6 is a sectional view of the neutral switch. 7, 7a, 7b, 7c...shift fork, 8
...Change lever shaft, 9...Transmission case, 13...Change lever, 22...Select arm, 25...Select lever, 26...Neutral lever, 27...Guide groove, 28...Neutral switch , 29... engager, 36...
Block.

Claims (1)

[Scope of Claim for Utility Model Registration] A change lever shaft supported by a transmission case supports a change lever that is rotatable around the axis of the shaft and slidable in the axial direction, and the change lever is In a shift operating device configured to select one of a plurality of shift forks by sliding in a direction and to shift the shift fork by rotating around an axis, the change lever is provided with a neutral lever. A neutral switch that engages with the neutral lever when the change lever is in the neutral position is fixed to the transmission case. There are guide grooves that extend parallel to each other.
The neutral switch is provided with an engaging element that elastically presses into engagement with the guide groove of the neutral lever and can be freely engaged and disengaged from the guide groove by rotation of the neutral lever. Gear shift operation device for automobile gear transmission.