JPH078923Y2 - Transmission mis-shift prevention device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a misshift prevention device for a transmission of an automobile.

<Prior art> As a device to prevent transmission misselection
There is 33861. This is a transmission with a shift pattern in which the fifth gear and the reverse gear are close to each other, which prevents an erroneous selection operation to the reverse gear and is extremely lighter than the conventional detent mechanism. The purpose is to enable select operations.

<Problems to be Solved by the Invention> As shown in FIG.
Therefore, a multi-speed transmission including a forward speed of the seventh speed VII and a reverse speed R is used. In this case, the shifts to the first speed I and the reverse speed R are at the same select position, and the shifts to the sixth speed VI and the seventh speed VII are at the same select position. And
First speed I, reverse speed R, second speed II, and third speed
A strong spring S1 is set during the shift with III,
The spring is set so that the shift lever position P at the time of neutral N comes to the select position of the fourth speed IV and the fifth speed V.
Springs S2 and S3, which are weaker than S1, are set.

By the way, the problem with such a transmission is
7th gear VII to 6th gear VI, 6th gear V
When shifting from I to 7th gear VII, if the gear is disengaged and the gearshift lever is returned to neutral N, the gearshift lever can return to position P of 4th gear IV and 5th gear V by the reaction force of spring S3. However, if the vehicle is shifted as it is, it may cause an overrun depending on the traveling vehicle speed, resulting in troubles of the transmission, the clutch, the engine, and the like.

The present invention is intended to prevent misshifts during high-speed traveling as described above.

<Means for Solving the Problems> The featured configuration of the present invention for achieving the above object is that the shift / select shaft is shifted to the first speed stage and the reverse stage at one axial maximum select operation position. , In a transmission having a shift pattern that shifts to the sixth speed and the seventh speed at the other axial maximum select operation position, the transmission output speed of the transmission during traveling at the sixth and seventh speeds is sensed. The rotation speed sensor, an annular groove provided on the shift / select shaft, a stopper pin engaging and disengaging the annular groove, and a drive device for moving the stopper pin forward and backward.
The shift / select shaft restraint means for permitting the shift / select shaft selected to the shiftable position in the speed stage in the shift direction, restraining and canceling the restraint in the select direction, and the transmission output rotation speed detected by the rotation sensor. First
If the gear is lower than the 6th or 7th gear and the overrun range occurs,
And a controller for applying a select direction restraint signal to the shift / select shaft restraint means.

<Operation> With the above configuration, when the vehicle is traveling in the sixth speed or the seventh speed and the transmission output speed is less than the sixth and seventh speeds in the overrun range, the shift / select shaft Locks the shaft movement in the select direction to prevent shifting to another gear. Further, at this time, it is possible to shift between the sixth speed and the seventh speed.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2, 1 is an engine and 2 is a transmission, which is the shift pattern of FIG. The 3rd which shows the A arrow part detail of FIG.
In the figure, reference numeral 3 denotes a shift / select shaft (hereinafter simply referred to as shaft) provided with a shift / select lever 4.

In the present invention, a rotation sensor 10 is installed near the transmission 2 to detect the output rotation speed of the transmission during traveling at the sixth and seventh speed stages VI and VII.

Further, the shaft 3 is provided with an annular groove 5 so that the sixth and seventh speeds V
Shift / select shaft restraint means for engaging and disengaging the annular groove 5 at the I, VII select shaft moving positions to restrain and release the axial movement of the shaft 3 in the select direction is provided.

This shift / select restraint means is, as shown in FIG.
A cylinder 6 is fixed to the housing of the transmission 2 in the axial direction orthogonal to the axial direction of the shaft 3, and the piston 7
A stopper pin 8 is provided to engage with and disengage from the annular groove 5. A return spring 9 of the piston 7 is inserted in the cylinder 6 so as to bias the stopper pin 8 in the backward direction in which the stopper pin 8 is disengaged from the annular groove 5.

Further, as shown in FIG. 2, the cylinder 6 and a pneumatic or hydraulic pressure source 11 are connected by a pipe, and an electromagnetic valve 12 is provided in this pipe. The solenoid valve 12 is controlled to be opened / closed by a signal from a computer 13, and the computer 13 controls the solenoid valve 12 to be opened / closed by the computer 13 determining a transmission output speed detection signal of the rotation sensor 10. is there.

In the above configuration, the rotation sensor 1 during running at the sixth and seventh speed stages VI and VII
At 0, the transmission output speed is sensed. The perceived rotation speed is
The computer 13 determines whether or not an overrun will occur if the vehicle travels at a speed lower than the sixth and seventh speeds VI and VII. If the engine speed is in the overrun range, the solenoid valve 12 is opened and pressure fluid is sent to the cylinder 6 to stop it. The pin 8 is engaged with the annular groove 5. As a result, the shaft 3 is restrained from moving in the axial direction, that is, in the select direction. At this time, since the movement of the shaft 3 in the rotation direction is allowed by the annular groove 5, the sixth and seventh
Shifting between speed VI and VII is possible, but 6th and 7th speed V
Prevent misshifts to gears below I and VII.

Further, even when the shift / select means is configured as shown in FIGS. 4 and 5, the same operation as described above can be obtained, and the object of the present invention is achieved.

That is, the stopper pin 14 that engages and disengages with the annular groove 5 of the shaft 3 is a permanent magnet, which is provided in the housing of the transmission 2 so as to be movable back and forth in the axial direction orthogonal to the axial direction of the shaft 3. The electromagnet 15 is fixed to the rear end position by the holder 16.

Further, the electromagnet 15 and the computer 13 are connected to each other, and the polarity of the electromagnet 15 is switched by the computer 13.

In the above configuration, in the usual case, the polarity of the electromagnet 15 is switched to a different polarity for attracting the permanent magnet of the stopper pin 14, so that the stopper pin 14 moves backward and the shaft 3 is freely selected.

However, the rotation sensor 10 during running at the sixth and seventh speeds VI and VII
When the output speed of the transmission sensed at 6th and 7th speeds VI and VII is lower than the overrun range, the electromagnet 15 switches its polarity to the same polarity as the permanent magnet of the stopper pin 14. , The stopper pin by the repulsive force of this magnet
14 is moved forward and engaged with the annular groove 5 to restrain the movement of the shaft 3 in the select direction.

<Effects of the Invention> As described above, according to the present invention, particularly in a transmission having a shift pattern in which the sixth speed and the seventh speed are shifted at the same select position, the vehicle travels at the sixth and seventh speeds. When the output speed of the transmission is less than the 6th and 7th speeds and the vehicle runs in the overrun range, the shift / select shaft is restrained from moving in the select direction and the 6th and 7th speeds are set. Since it is possible to shift to any of the 6th and 7th speeds when traveling at high speeds in the 6th and 7th speeds, a misshift to the 5th speed or the 4th speed is surely made. It prevents the trouble of the power unit due to overrun.

[Brief description of drawings]

FIG. 1 is a shift pattern diagram of a transmission to which the device of the present invention is applied, FIG. 2 is an overall view of the device of the present invention, and FIG.
FIG. 4 is a detailed sectional view of an arrow portion, FIG. 4 is an overall view showing another configuration of the device of the present invention, and FIG. 5 is a detailed sectional view of an arrow portion of FIG. 4B. 2 ... transmission, 3 ... shift select shaft, 5 ...
… Annular groove, 6 …… Cylinder, 8 …… Stopper pin, 10…
… Rotation sensor, 12 …… Solenoid valve, 13 …… Computer, 14
...... Permanent magnet stopper pin, 15 …… Electromagnet.

Claims (3)

[Scope of utility model registration request] 1. A shift / select shaft is shifted to a first gear and a reverse gear at one axial maximum select operation position, and is shifted to a sixth gear and a seventh gear at the other axial maximum select operation position. In a transmission having a shift pattern, a rotation sensor for detecting the transmission output speed of the transmission while traveling at the sixth and seventh speeds, an annular groove is provided on the shift / select shaft, and the engagement / disengagement is made in the annular groove. Consisting of a stopper pin and a drive device that moves the stopper pin forward and backward, and allows the shift / select shaft that has been selected to the shiftable position of the 6th and 7th speed stages in the shift direction and restrains and releases the restraint in the select direction. The shift / select shaft restraining means for controlling the shift output speed when the output speed of the transmission detected by the rotation sensor is less than the 6th and 7th speeds, the shift Misshift prevention apparatus for a transmission comprising a controller for applying a select direction restraint signal to the recto shaft restraining means. 2. A shift / select shaft is shifted to a first speed and a reverse speed at one axial maximum select operation position, and is shifted to a sixth speed and a seventh speed at the other axial maximum select operation position. In the transmission of the shift pattern described above, a rotation sensor for detecting the output speed of the transmission during traveling at the sixth and seventh speeds is provided, and the shift / select shaft is provided with an annular groove. Of the first
At the 6th and 7th speed select shaft moving position, a pressure cylinder equipped with a stopper pin that can be engaged with and disengaged from the annular groove is installed in the axial direction orthogonal to the axial direction of the shift / select shaft. An electromagnetic valve is installed in the pressure fluid pipe with the cylinder, and the transmission output speed detected by the rotation sensor is
A misshift preventing device for a transmission, comprising a controller for controlling the solenoid valve so that a stopper pin of the pressure cylinder is engaged with an annular groove when an overrun range occurs in a shift speed lower than the sixth and seventh speeds. 3. A shift / select shaft is shifted to a first speed and a reverse speed at one axial maximum select operation position, and is shifted to a sixth speed and a seventh speed at the other axial maximum select operation position. In the transmission of the shift pattern described above, a rotation sensor for detecting an output rotation speed of the transmission during traveling at the sixth and seventh speeds is provided, and an annular groove is provided in the shift / select shaft. Of the first
At the 6th and 7th speed select shaft moving positions, a stopper pin of a permanent magnet that can be engaged with and disengaged from the annular groove is provided so as to be movable forward and backward in the axial direction orthogonal to the axial direction of the shift / select shaft. An electromagnet is placed at the rear end position, and the transmission output speed detected by the rotation sensor is
A gear shift prevention device for a transmission including a controller that switches the polarity of the electromagnet so that the stopper pin magnetically excites in the direction in which the stopper pin engages with the annular groove in the case of an overrun range at a gear lower than the sixth and seventh gears. .