JP2001146964A - Automatic transmission device of gear type transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic transmission device of gear type transmission offering a sure operation and embodied in a compact and simple construction. SOLUTION: A driving mechanism in a housing is equipped with at least either of the two sets consisting of a select speed-reducing gear train coupled with a select motor upon being coupled with a select lever to be coupled with a shifting select shaft of a gear type transmission, a select default position stopping mechanism as a spring installed between the select lever and the housing for stopping the lever in the default position at all times, a shift speed- reducing gear train coupled with a shift motor upon being coupled with a shift gear to be coupled with the shifting select shaft, and a shift default position stopping mechanism as a spring installed between the shift gear and housing for stopping the shift gear in the default position at all times.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic transmission for a gear-type transmission, and more particularly, it is devised to relieve a driver of the trouble of manual shifting of an existing gear-type transmission. It is connected to a shift / select shaft of an existing gear type transmission and operated using a power source.

[0002]

2. Description of the Related Art Heretofore, there has been a system in which the mechanism of a manual transmission is used as it is, and the shift and clutch operation are automated by a computer via a hydraulic device.
There is also a gear type transmission in which a motor is used as a select or shift actuator.

[0003]

A conventional automatic transmission for a gear transmission has a complicated structure in which three cylinders for clutch, shift, and select, and a large number of solenoid valves for driving these are used when hydraulic pressure is used. And the use of motors requires multiple motors, solenoids, etc., because the number of motors required is equal to the number of select lines. There was a problem that the cost was high. Further, since the default position stop function was not provided to the gear type transmission in some cases, it was necessary to perform feedback control by a sensor for detecting the shift / select position.

The present invention was conceived in order to solve the above-mentioned problem of the conventional automatic transmission for a gear transmission, and is a small-sized automatic transmission having a default position stop function that can automatically shift an existing gear transmission. It is an object of the present invention to provide an automatic transmission having a simple structure.

[0005]

According to the first aspect of the present invention, there is provided an automatic transmission for a gear type transmission, wherein a shift / select shaft of the gear type transmission is supported by a housing for gear shifting of the gear type transmission. The shaft is moved and rotated by a driving mechanism, and the driving mechanism is
A select lever connected to the select shaft, a select reduction gear train connected to the select lever to move the shift / select shaft, a select motor connected to the select reduction gear train, and connected to the shift / select shaft A shift gear, a shift reduction gear train connected to the shift gear to rotate the shift / select shaft, a shift motor connected to the shift reduction gear train, and a shift lever provided between the select lever and the housing. There is provided at least one of a select default position stop mechanism for stopping the shift gear at the default position and a shift default position stop mechanism provided between the shift gear and the housing to constantly urge the shift gear to the default position.

Further, the select default position stopping mechanism may be a select spring for urging the select lever to the default position, and the shift default position stopping mechanism may be a shift spring for constantly urging the shift gear to the default position.

The select default position may be a neutral position of the gear transmission, and the shift default position may be a neutral position of the gear transmission. The select lever is provided integrally with the shift / select boss.The shift / select boss is supported by the housing so as to be able to move and rotate, and is connected so as to move integrally with the shift / select shaft, and the shift gear is connected to the spline shaft. The spline shaft is integrally provided, and is rotatably supported by the housing. The spline shaft may be spline-coupled to the shift / select boss such that the spline shaft can move in the axial direction but cannot rotate.

[0008] The spline shaft may have a connection portion with a tool for manually rotating the spline shaft.

Further, the select reduction gear train and the shift reduction gear train may be constituted by spur gears and worm gears, and the reduction ratio may be fixed.

Further, the shift reduction gear train may include a non-linear mechanism constituted by a non-circular gear or a cam, and the non-circular gear or the reduction ratio may fluctuate.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, embodiments of the present invention will be described. FIG. 1 is a front sectional view of the automatic transmission of the gear transmission of the present invention, and FIG. 2 is a side sectional view of the automatic transmission of the gear transmission of the present invention. The automatic transmission of a gear type transmission is connected to a shift / select shaft 1 extending outward from an existing gear type transmission (not shown), and the shift / select shaft 1 is moved in the axial direction. Move to select the gear type transmission,
The shift / select shaft 1 is rotated in the axial direction to automatically shift gears in the gear transmission by a power source. That is, in the existing gear type transmission, the shift / select shaft 1 extended outward is moved in the axial direction to shift from the first speed, the second speed to the fifth speed,
R can be selected, and the center can be selected at the third and fourth speed positions.

After the selection as described above, the shift / select shaft 1 is rotated in the axial direction as shown in the shift pattern diagram of FIG. The shift operation can be completed by shifting to the position shown in FIG. 3, and a drive mechanism as a select and shift mechanism for executing such a select and shift operation is incorporated in the automatic transmission shown in FIGS. Have been.

The drive mechanism of the automatic transmission shown in FIGS. 1 and 2 has an outer periphery surrounded by and supported by a housing 25, and a DC motor 2 for selection is disposed on the right side in the drawing. The select motor gear 3 is fixed to the motor shaft of the select motor 2 so that the select actuator gear 3 can rotate forward and reverse. An intermediate gear 4 is meshed with the select actuator gear 3, and the intermediate gear 4 is fixed by an intermediate pinion 5. A select gear 6 (FIG. 2) is meshed with the intermediate pinion 5, and a select gear 6 is formed. Is fixed to the select shaft 7.

A select lever 9 is fixed to the select shaft 7, and the select shaft 7 is rotatably supported by a ball bearing 26. Also,
At the tip of the select lever 9, a pin 7a is engaged with a circumferential groove between two flanges 10a of a shift / select boss 10 which will be described later. It can be moved in the direction.

One end of a select spring 31 is connected to the end of the select lever 9, and the other end of the select spring 31 is connected to the support frame 2 which is a part of the housing 25.
5a. Since the select spring 31 is in a natural state or a neutral state in which it does not extend or contract, even if the select motor 2 is rotated to rotate the select lever 9 in any direction from the initial position,
When the operation of the select motor 2 is stopped, the select lever 9 is returned to the original position by the select spring 31 to be in the neutral position in the select direction, and reaches the third and fourth speed select lines. In this sense, the select spring 31 is a select default position stopping mechanism.

A pin 9a extends from the end of the select lever 9, and the pin 9a is engaged with a circumferential groove between the two flanges 10a of the shift / select boss 10.
The shift / select boss 10 has a key 27 and a set screw 2
8 and is fixed to the shift / select shaft 1. The shift / select shaft 1 extends outwardly from a gear type transmission (not shown). The shift / select shaft 1 connects the gear type transmission to the automatic transmission of the gear type transmission. I have.

As described above, the shift / select shaft 1
Is connected to a select lever 9 via a shift / select boss 10. The select lever 9 is connected to a reduction gear train including a select actuator gear 3, an intermediate gear 4, an intermediate pinion 5, a select gear 6, and a select shaft 7. Are connected, and a select motor 2 is connected to the reduction gear train. Therefore, the rotation of the select motor 2 is transmitted to the select lever 9 by the reduction gear train, and the shift / select shaft 1 can be moved in the axial direction, that is, in the axial direction.

The housing 25 is provided with a shift DC motor, ie, a shift motor 11 capable of forward / reverse rotation control, and a shift actuator gear 12 (FIG. 2) is fixed to a motor shaft 11a of the shift motor 11. The shift actuator gear 12 has a second intermediate gear 13
The second intermediate gear 13 is fixed by a fourth intermediate pinion 14, and the sixth intermediate gear 15 is engaged with the fourth intermediate pinion 14.

The sixth intermediate gear 15 has a second intermediate pinion 16
The third intermediate gear 17 is meshed with the second intermediate pinion 16, and the third
The intermediate gear 17 is fixed by a third intermediate pinion 18, and a fan-shaped shift gear 19 is meshed with the third intermediate pinion 18. Shift gear 19
Is fixed to a spline shaft 20 described later, and a fourth intermediate gear 21 is fixed to the shift gear 19.

The spline shaft 20 is supported by a housing 25 by a bearing 25b or the like so as to be rotatable but does not move in the axial direction. One end of the spline shaft 20 is in the form of a spline and is engaged with the shift / select boss 10 having a serrated shape. Thus, the shift / select boss 10 can be moved in the axial direction but cannot be rotated. The shift gear 19 is fixed to the spline shaft 20 by a key or the like. The other end of the spline shaft 20 protrudes out of the housing 25 and is provided with an emergency shift operation groove 2.
The spline shaft 20 has a connection portion with a tool 0a so that the spline shaft 20 can be rotated by a manual tool in an emergency.

As described above, the shift / select shaft 1
Has a shift / select boss 10 and a spline shaft 2
0 is connected to the shift gear 19 through the shift gear 19.
Has a shift actuator gear 12 and a second intermediate gear 1
A shift reduction gear train composed of a third intermediate pinion 14, a sixth intermediate gear 15, a second intermediate pinion 16, a third intermediate gear 17, and a third intermediate pinion 18 is connected to the shift reduction gear train. Is connected to the shift motor 11. Therefore, the rotation of the shift motor 11 is transmitted to the shift gear 19 by the shift reduction gear train, and the shift / select shaft 1 can be rotated.

The shift gear 19 is also connected to one end of a shift spring 32 (FIG. 2), and the other end of the shift spring 32 is connected to the housing 25. The shift spring 32 is in a natural state in which it is not extended or contracted, or in a neutral state. Therefore, even if the shift gear 11 is rotated in any direction from the initial position by rotating the shift motor 11, if the operation of the shift motor 11 is stopped, the shift gear 19 is returned to the original position by the shift spring 32. To the neutral position on the shift side. In this sense, the shift spring 32 is a shift default position stop mechanism.

In the automatic transmission for a gear type transmission according to the present invention, when a select operation is performed, the select motor 2 is operated, whereby the select actuator gear 3 is operated.
Rotates, and the select shaft 7 is rotationally displaced via the intermediate gear 4, the intermediate pinion 5, and the select gear 6. As a result, the select lever 9 fixed to the select shaft 7 is swung, and the shift / select boss 10 and the shift / select shaft 1 are moved in the axial direction.

Next, in the shift operation, the shift motor 1
1 operates, the shift actuator gear 12 rotates, and the second intermediate gear 13, the fourth intermediate pinion 14, the sixth
Intermediate gear 15, second intermediate pinion 16, third intermediate gear 1
7, the spline shaft 20 rotates via the third intermediate pinion 18 and the shift gear 19. Therefore, the shift / select boss 10 and the shift / select shaft 1 that mesh with the spline shaft 20 rotate,
The shift / select shaft 1 is caused to reach a predetermined position, whereby the shift is completed.

When the electrical connection cannot be established for some reason and the shift motor 11 cannot be driven, the spline shaft is manually rotated by a tool using a connecting portion which is a groove at one end of the spline shaft 20. Thus, the shift / select shaft 1 can be rotated, and has an emergency shift operation function.

As described above, in the automatic transmission of the gear type transmission according to the present invention, by providing the default position stopping function by the default position stopping mechanism, it is necessary to perform the shifting and the clutch operation by the computer via the hydraulic device. In addition, there is no need to use a large number of actuator motors and solenoids, so that the structure is simple and small, and the price is low. The above-described select default position stop mechanism and shift default position stop mechanism can be selectively provided to the automatic transmission according to whether or not a default function is provided to the gear type transmission that is the object of the automatic transmission control. it can.

Embodiment 2 FIG. FIG. 4 is a side sectional view similar to FIG. 2 of the automatic transmission of the gear type transmission of the present invention connected to an existing gear type transmission. The direction in which the shift / select shaft 1 is operated and the shift pattern are the same. This is the same as the first embodiment.

The structure on the select side of the automatic transmission of the gear transmission shown in FIG. 4 is the same as that of the first embodiment, but the structure on the shift side is constituted by a non-circular gear or cam in the shift reduction gear train. The difference is that a non-linear mechanism is provided to vary the reduction ratio. That is, the shift motor 11
Is fixed to a housing 25, a shift actuator gear 12 is fixed to a motor shaft of the shift motor 11, and a second intermediate gear 13 is meshed with the shift actuator gear 12. Next, according to this embodiment, the elliptical pinion 29 is provided coaxially with the second intermediate gear 13, and the elliptical pinion 29 is engaged with the elliptical gear 30.
It is different in that it is provided coaxially with the intermediate pinion 16.

Between the select lever 9 and the housing 25, a select spring 31 for constantly stopping the select lever 9 at its default position which is the neutral position.
And a shift default position stop mechanism, which is a shift spring 32 that constantly urges the shift gear 19 to its default neutral position between the shift gear 19 and the housing 25. The provision of the mechanism is the same as in the previous embodiment.

The select default position stop mechanism and the shift default position stop mechanism are selectively used in the automatic transmission according to whether or not a default function is provided to the gear type transmission to be subjected to the automatic transmission control. Can be given to.

The following mechanism of the shift reduction gear train is again the first
The second intermediate pinion 16 is the same as the third embodiment.
The third intermediate gear 17 is engaged with the intermediate gear 17.
Is fixed by a third intermediate pinion 18, a shift gear 19 is meshed with the third intermediate pinion 18, and the shift gear 19 is connected to a spline shaft 20.
The shift gear 19 has a fourth intermediate gear 21 fixed thereto, and the spline shaft 20 is meshed with the shift / select boss 10.

When the select operation is performed, the operation is the same as that of the first embodiment. However, in the shift operation, when the shift motor 11 operates, a non-linear mechanism operates. That is, when the shift actuator gear 12 rotates, the second intermediate gear 1
3, the spline shaft 20 is rotated via the elliptical pinion 29, the elliptical gear 30, the second intermediate pinion 16, the third intermediate gear 17, the third intermediate pinion 18, and the shift gear 19, and the shift meshes with the spline shaft 20. The select boss 10 and the shift / select shaft 1 are rotated, and the shift / select shaft 1 reaches a predetermined position, whereby the shift is completed. At this time, the variable reduction ratio at the rotational displacement obtained by the elliptical gear 30 and the elliptical pinion 29 increases the reduction ratio at the position where the load at the time of shift is large in the angular displacement of the shift / select shaft 1 as shown in FIG. Thus, the load on the shift motor 11 can be reduced.

[0033]

As described above, in the automatic transmission for a gear type transmission according to the present invention, the shift / select shaft of the gear type transmission is supported by the housing for gear shifting of the gear type transmission. An automatic transmission in which a drive mechanism moves the shaft and rotates.
A select lever connected to the select shaft, a select reduction gear train connected to the select lever to move the shift / select shaft, a select motor connected to the select reduction gear train, and connected to the shift / select shaft A shift gear, a shift reduction gear train connected to the shift gear to rotate the shift / select shaft, a shift motor connected to the shift reduction gear train, and a shift lever provided between the select lever and the housing. There is provided at least one of a select default position stop mechanism for stopping the shift gear at the default position and a shift default position stop mechanism provided between the shift gear and the housing to constantly urge the shift gear to the default position. Therefore, it is possible to reduce the size and weight of the automatic transmission of the gear type transmission and to increase the reliability of operation.

The select default position stopping mechanism is a select spring for urging the select lever to the default position, and the shift default position stopping mechanism is a shift spring for constantly urging the shift gear to its default position. The mechanism of the automatic transmission of the transmission is small and well-organized, and the reliability of operation is increased and the reliability is also increased.

Further, the select default position may be the neutral position of the gear transmission, and the shift default position may be the neutral position of the gear transmission, so that the mechanism of the automatic transmission of the gear transmission is small. The unity is improved, the reliability of operation is increased, and the reliability is also increased.

Further, the select lever is provided integrally with the shift / select boss. The shift / select boss is supported by the housing so as to be able to move and rotate, and is connected so as to move integrally with the shift / select shaft. The spline shaft is provided integrally with the spline shaft, and the spline shaft is rotatably supported by the housing. The spline shaft may be spline-coupled so that it can move in the axial direction with respect to the shift / select boss but cannot rotate. The mechanism of the automatic transmission of the transmission is small and well-organized, and the reliability of operation is increased and the reliability is also increased.

Further, since the spline shaft may be provided with a connecting portion with a tool for manually rotating the spline shaft, the shift motor 1 may be used in case of any electric failure.
The emergency shift operation function of rotating the shift / select shaft 1 using this connection portion can be exhibited even when the first gear 1 cannot be driven.

Further, since the select reduction gear train and the shift reduction gear train are constituted by spur gears and worm gears and the reduction ratio is fixed, the automatic transmission of the gear type transmission is reduced in size and weight, and the reliability of operation is reduced. Can be increased.

Further, the shift reduction gear train has a non-linear mechanism constituted by a non-circular gear or a cam, and the non-circular gear or the reduction ratio fluctuates. Therefore, the automatic transmission of the gear transmission can be reduced in size and weight. In addition to increasing the reliability of the operation, a torque corresponding to the shift can be obtained, and the load applied to the shift motor can be reduced by increasing the reduction ratio at an angular position where the load is large.

[Brief description of the drawings]

FIG. 1 is a cross-sectional top view of an embodiment of an automatic transmission for a gear transmission of the present invention for automatically shifting a gear transmission.

FIG. 2 is a front sectional view of the automatic transmission of the gear transmission shown in FIG. 1;

FIG. 3 is a shift pattern diagram.

FIG. 4 is a diagram showing a relationship between a load and a reduction ratio in shift / select shaft displacement.

FIG. 5 is a top sectional view of another embodiment using an elliptical gear of the automatic transmission of the gear transmission according to the present invention.

[Explanation of symbols]

1 shift select shaft, 2 select motors,
3-7 Select reduction gear train, 9 Select lever, 1
0 shift select boss, 11 shift motor, 12
~ 18 shift reduction gear train, 19 shift gear, 20
Spline shaft, 21 fourth intermediate gear, 22 fifth intermediate gear, 25 housing, 29 elliptical pinion, 30 elliptical gear, 31 select spring, 32 shift spring.

Claims (7)

[Claims] 1. An automatic transmission in which a shift / select shaft of a gear transmission is axially and rotationally moved by a drive mechanism supported by a housing for gear shifting of the gear transmission of the gear transmission. Wherein the drive mechanism is coupled to the select / select shaft, a select lever coupled to the shift / select shaft, a select reduction gear train coupled to the select lever to axially move the shift / select shaft, A select motor, a shift gear connected to the shift / select shaft, a shift reduction gear train connected to the shift gear to rotate the shift / select shaft, and a shift motor connected to the shift reduction gear train And provided between the select lever and the housing, A select default position stop mechanism for constantly stopping the lect lever at its default position; and at least one of a shift default position stop mechanism provided between the shift gear and the housing to constantly urge the shift gear to its default position. Automatic transmission of a gear type transmission comprising: 2. The select default position stopping mechanism is a select spring that biases the select lever to a default position, and the shift default position stop mechanism is a shift spring that constantly biases the shift gear to its default position. The gear automatic transmission according to claim 1. 3. The gear automatic transmission according to claim 1, wherein the select default position is a neutral position of the gear transmission, and the shift default position is a neutral position of the gear transmission. 4. The shift select boss is provided integrally with the shift select boss, and the shift select boss is
The housing is rotatably supported by the housing so as to be rotatable and rotatable, and is coupled to move integrally with the shift / select shaft. The shift gear is provided integrally with a spline shaft, and the spline shaft is rotatably supported by the housing. 4. The automatic transmission according to claim 1, wherein the shift select boss is spline-coupled so that the shift select boss can move in the axial direction but cannot rotate. 5. The spline shaft according to claim 1, wherein the spline shaft has a connection portion with a tool for manually rotating the spline shaft.
5. The automatic transmission for a gear type transmission according to any one of claims 4 to 4. 6. The automatic transmission according to claim 1, wherein the select reduction gear train and the shift reduction gear train are constituted by spur gears and worm gears, and have a fixed reduction ratio. . 7. The gear transmission according to claim 1, wherein the shift reduction gear train includes a non-linear mechanism formed of a non-circular gear or a cam, and the non-circular gear or the reduction ratio varies. Automatic transmission.