JPH1163216A - Automatic transmission device for gear type transmission - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely and satisfactorily shift a gear type transmission by connecting a select shift rod, rotating the select shift rod in an axially rotational direction for selecting the gear type transmission, axially moving the select shift rod, and automatically shifting the gear of the transmission. SOLUTION: A selecting stepping motor 2 is rotated at the time of selective operation of this device, while a select gear 4, a select shaft 5 and a sleeve 7 are rotated. A select shift rod is rotated with a controlled rotational angle by steppedly rotating the selecting stepping motor 2. A shifting motor 9 is operated at the time of shifting operation, while an intermediate shaft 12, a long actuator gear 13, and a shift gear 14 are rotated. A slider 17 is axially moved while rotating a male screw 15 through a female screw 16. The shift gear 14 is rotated while being meshed with the long actuator gear 13, and is axially moved.

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 transmission.

[0002]

2. Description of the Related Art Conventionally, there is a conventional gear-type transmission mechanism in which the mechanism of a manual gear-type transmission is used as it is and a computer automatically automates the shift and clutch operation via a hydraulic device. There are problems that three cylinders for use and a large number of solenoid valves for driving these are required, and a hydraulic system is required, so that the structure becomes complicated and large, and the cost becomes high. Further, as a motor using a select or shift actuator of a gear type transmission, for example, Japanese Patent Publication No. 61-51
Although there is also one disclosed in Japanese Patent Application Laid-Open No. 697, this apparatus requires motors as many as the number of select lines, and a plurality of motors or solenoids are used, resulting in a complicated and large-sized apparatus. As a result, there was a problem that the cost was high.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide an automatic transmission having a simple structure capable of automatically shifting an existing gear type transmission. The first gist is that the select shift rod is rotated in the shaft rotation direction to select the line of the internal shift fork, and then the select shift rod is moved in the axial direction to interlock the shift fork. Gear-type transmission configured to complete gear shifting
An automatic transmission that is connected to the select shift rod to perform the select and shift operations, wherein a select mechanism that performs the select operation and a shift mechanism that performs the shift operation are incorporated in the automatic transmission. The select mechanism includes a select stepping motor that can be rotated forward and reverse and can be controlled to a predetermined rotational angle, a select shaft that transmits a stepwise rotational angle operation of the motor by a select gear, and one end of the select shaft. A select sensor for detecting an operating angle in the rotation direction provided on the other end of the select shaft; The shift mechanism comprises: a shift motor capable of controlling forward and reverse rotation; an actuator gear for transmitting rotation of the motor; A long actuator gear on the intermediate shaft to which the actuator gear is connected, a shift gear meshed with the long actuator gear, and a female screw screwed with a male screw externally fixed to the shift gear and the select shaft are integrally formed. A selectable slider comprising: a fixed slider; the sleeve connected to the slider via a slider bearing; and a stroke sensor for detecting an axial movement amount of any one of end faces of the shift gear, the slider, and the sleeve. In operation, the shift motor is set in a no-load state, the select stepping motor is operated, the select shaft is rotated, and the select shift rod is adjusted via feedback control via the select sensor via the sleeve. With displacing to the predetermined select line At the time of the shift operation, the shift motor is operated in a state where the select stepping motor generates a static force and the male screw of the select shaft is held stationary, via the actuator gear and the long actuator gear, The slider rotated by the shift gear moves axially on the male screw of the select shaft while rotating via the female screw, and the rotational force of the slider is absorbed by the slider bearing and the sleeve is rotated. Move only in the direction
The select shift rod is configured to be adjusted to a predetermined shift position by feedback control via the stroke sensor. Further, a second gist is that a slide piece that straddles the outer peripheral portion of both sides of the shift gear and moves in the axial direction while rotatably holding the shift gear, and guides and holds the slide piece so as to move in the axial direction. And a guide bracket having one end fixed to the housing, and the stroke sensor for holding a contact on an end surface of the slide piece and detecting an axial movement amount of the slider.

[0004]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional configuration diagram of an automatic transmission that is devised to relieve a driver from the inconvenience of a shift frequency for performing a shift operation of an existing gear transmission (not shown) and that is connected to the existing gear transmission. Yes, connected to the select shift rod extending outward from the existing gear type transmission,
By rotating this select shift rod in the shaft rotation direction to select the gear type transmission, the gears in the gear type transmission are automatically shifted by moving the select shift rod in the axial direction. is there.

That is, in an existing gear type transmission (not shown), an outwardly extending select shift rod is connected to the transmission shown in FIG.
As shown in the select operation diagram of FIG. 3, the line is shifted in the shaft rotation direction to select a line in the shift direction inside the gear type transmission. As shown in FIG. 3, the select shift rod is clockwise moved in the shaft rotation direction. It can be turned to select the 1st or 2nd speed position, turned counterclockwise to select the 5th speed position, and the center can be selected to the 3rd and 4th speed positions. After the line in the internal shift direction is selected in this manner, the select shift rod is moved in the axial direction, and the internal shift fork is moved in conjunction with the internal gear to move the internal gear to a predetermined position as shown in the shift pattern diagram of FIG. The shift operation can be completed by shifting to the first gear position or the second gear position. The automatic transmission shown in FIG. 1 within.

The automatic transmission 1 shown in FIG. 1 shows a state in which the positions of the slider 17 and the sleeve 7 are moved above and below the center line C, and the housing 1a of the automatic transmission 1 is shown.
A stepping motor 2 for selection is provided outside of the motor, and the stepping motor 2 for selection can be controlled at a predetermined rotation angle by controlling forward and reverse rotation so that the motor can be stopped at a predetermined rotation angle. Is configured. A motor gear 3 is fixed to a motor shaft of the select stepping motor 2, and a select gear 4 is meshed with the motor gear 3, and the select gear 4 is fixed to a select shaft 5. A select sensor 6 is provided at the left end of the select shaft 5 in the figure to detect the operating angle of the select shaft 5 in the rotation direction. Further, a sleeve 7 is fitted on the right end side of the select shaft 5 via a slide key 8 so as to be non-rotatable and movable only in the axial direction via a slide key 8, and the select stepping motor 2 and the select gear 4, select shaft 5, The select sensor 6 and the sleeve 7 constitute a select mechanism capable of rotating the select shift rod of the gear transmission in the axial rotation direction.

A shift motor 9 composed of a normal motor is provided in the lower part of FIG. 1, and a motor gear 10 is fixed to a motor shaft of the shift motor 9. The actuator gear 11 is meshed with the actuator gear 11. The actuator gear 11 is fixedly mounted on the intermediate shaft 12. On the outer periphery of the intermediate shaft 12 on the right side of the actuator gear 11 in the drawing, a long shaft formed in the axial direction is formed. The actuator gear 13 is externally fitted and fixed. A shift gear 14 is meshed with the long actuator gear 13, a female screw 16 is fixed inside the shift gear 14, and a slider 17 extending in the axial direction is integrally fixed to the shift gear 14. The female screw 16 is screwed to a male screw 15 externally fitted and fixed to the select shaft 5, and the male screw 15 is formed to be long in the axial direction. A slider bearing 18 is provided inside the right end of the slider 17.
The sleeve 7 is connected to the inside of the slider bearing 18. A connecting member S for coaxially connecting a select shift rod of a gear transmission (not shown) is provided at the right end of the sleeve 7. The select shift rod is coaxially connected to the sleeve 7 via the connecting member S. It is configured to be able to be connected.

The outer periphery of the shift gear 14 is shown in FIG.
As shown in FIG.
The slide piece 20 is attached to a guide bracket 21 having one end fixed to the housing 1a so as to be movable in the axial direction, and a U-shaped groove of the guide bracket 21 is provided. The inside of 21 a is fitted into a guide groove 20 a formed in the slide piece 20. A contact 19 a protruding from the stroke sensor 19 is provided on the right end face of the slide piece 20. Therefore, the stroke sensor 19
Is configured such that the amount of axial movement of the shift gear 14 and the slider 17 can be detected from the axial movement of the contact 19a abutting on the slide piece 20, and the contact 19a directly abuts the shift gear 14. Therefore, the configuration is such that the contact 19a is not worn and the axis of the stroke sensor 19 is not bent.

In such an automatic transmission 1, during the select operation, the shift motor 9 is kept in a no-load state, and when the select stepping motor 2 is operated in this state, the rotation of the select stepping motor 2 is started. As a result, the select gear 4 is rotated via the motor gear 3, the select shaft 5 is accordingly rotated, and the sleeve 7 externally fitted to the select shaft 5 is also rotated, and the gear type transmission (not shown) connected to the sleeve 7 is rotated. Is rotated, and the rotation angle can be appropriately controlled by rotating the selection stepping motor 2 in a stepwise manner. In this case, the detection signal from the selection sensor 6 is The sleeve 7 is fed back to rotate the sleeve 7 so that the rotation angle becomes a predetermined select line. Select shift rod is displaced. As a result, a select operation for selecting a shift fork line inside the gear transmission is performed.

During the shift operation, the select stepping motor 2 is stopped at a predetermined angle to generate a static force, whereby the select shaft 5 is in a non-rotatable stationary state. The male screw 15 externally fitted to 5 is also held stationary. When the shift motor 9 is operated in this state, the intermediate shaft 12 is rotated via the actuator gear 11, whereby the long actuator gear 13 is rotated and torque is transmitted to the shift gear 14, and the shift gear 14 is rotated. When the female screw 16 rotates, the female screw 16 of the slider 17 is screwed to the male screw 15 in a stationary state. Therefore, the slider 17 rotates on the male screw 15 via the female screw 16 in the axial direction, that is, in the right direction in the drawing. Accordingly, the shift gear 14 also moves in the axial direction while rotating while meshing with the long actuator gear 13. Since the rotational force of the slider 17 is absorbed by the slider bearing 18, the rotational force is not transmitted to the sleeve 7, and the sleeve 7 receives only the axial moving force of the slider 17 and moves only in the axial direction.
As a result, the select shift rod of the gear transmission (not shown) connected to the sleeve 7 moves in the axial direction, and the shift fork inside the gear transmission is interlocked to perform the gear shifting operation in the gear transmission. be able to. In this case, the amount of axial movement of the slider 17 is detected by the above-described stroke sensor 19, and this signal is fed back to the shift motor 9 to control the shift motor 9, and the sleeve 7 is moved to a predetermined position. The geared transmission is shifted to a predetermined shift position. As described above, in this example, two motors for select and shift are used, and the select operation and the shift operation can be automatically performed well with a simple structure.

[0011]

According to the present invention, the line of the internal shift fork is selected by rotating the select shift rod in the axial rotation direction, and then the select shift rod is moved in the axial direction, so that the shift fork is interlocked. An automatic transmission that is connected to the select shift rod to execute the select and shift operations, wherein the automatic shift device includes A select mechanism for performing an operation and a shift mechanism for performing the shift operation are incorporated. The select mechanism includes a selectable stepping motor capable of normal and reverse rotation and controllable to a predetermined rotation angle, and a stepwise rotation angle of the motor. Detecting a select shaft transmitted by a select gear and an operation angle in a rotational direction provided at one end of the select shaft. A rect sensor and a sleeve externally fitted to the other end of the select shaft so as to be non-rotatably and axially movable and connected to a select shift rod of the gear transmission. The shift mechanism is capable of controlling forward and reverse rotation. A shift motor, an actuator gear for transmitting the rotation of the motor, a long actuator gear on an intermediate shaft connecting the actuator gear, a shift gear meshed with the long actuator gear, the shift gear and the select shaft. A slider integrally fixed with an externally threaded male screw and a female screw to be screwed together, the sleeve connected to the slider via a slider bearing, and a shift gear, a slider, or one of end faces of the sleeve. A stroke sensor for detecting the amount of movement in the axial direction. The select motor is turned off, the select stepping motor is operated, the select shaft is rotated, the select shift rod is adjusted via the sleeve by feedback control via the select sensor, and a predetermined select line is set. During the shift operation, the shift motor is operated in a state where the select stepping motor generates a static force and the male screw of the select shaft is held stationary, and the actuator gear and the long actuator are operated. Through a gear, the slider rotated by the shift gear moves axially on the male screw of the select shaft while rotating via the female screw, and the rotational force of the slider is absorbed by the slider bearing. The sleeve moves only in the axial direction and the select The shift gear rod is adjusted by feedback control via the stroke sensor to be moved to a predetermined gear shift position, so that the two motors are controlled respectively, and the existing gear type transmission can be automatically satisfactorily adjusted. The present invention has an effect that the automatic transmission can be shifted, the structure is simple, light and compact, and the cost is reduced.

Also, a slide piece that straddles the outer peripheral surface of the shift gear so as to rotatably hold the shift gear and moves in the axial direction, and guides and holds the slide piece so that it can move in the axial direction and has one end. A guide bracket fixed to the housing and the stroke sensor that detects a movement amount of the slider in the axial direction by holding a contact on an end face of the slide piece, so that the axis of the sensor is bent or contacted. This effectively prevents the child from being worn, and has the effect of increasing the durability of the sensor and enabling compact arrangement.

[Brief description of the drawings]

FIG. 1 is a sectional view of an automatic transmission for automatically shifting a gear type transmission.

FIG. 2 is an exploded perspective view of the vicinity of a guide bracket provided in FIG. 1 and a slide piece of a stroke sensor.

FIG. 3 is an explanatory diagram of a select operation.

FIG. 4 is a shift pattern diagram.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Automatic transmission 1a Housing 2 Select stepping motor 3 Motor gear 4 Select gear 5 Select shaft 6 Select sensor 7 Sleeve 9 Shift motor 10 Motor gear 11 Actuator gear 12 Intermediate shaft 13 Long actuator gear 14 Shift gear 15 Male screw 16 Female screw 17 Slider Reference Signs List 18 slider bearing 19 stroke sensor 19a contact 20 slide piece 20a guide groove 21 guide bracket S select shift rod connecting member

Claims (2)

[Claims] 1. A select shift rod is rotated in an axial rotation direction to select an internal shift fork line,
Next, the select shift rod is moved in the axial direction, and the shift fork is interlocked to complete the gear shift. The gear type transmission is connected to the select shift rod to perform the select and shift operations. An automatic transmission that executes the select operation and a shift mechanism that executes the shift operation, wherein the select mechanism is rotatable in a normal and reverse direction and has a predetermined rotation. A select stepping motor 2 that can be controlled to a rotational angle, a select shaft 5 that transmits a stepwise rotational angle operation of the motor 2 by a select gear 4, and a rotational operation angle provided at one end of the select shaft 5. A select sensor 6 for detecting
A sleeve 7 fitted to the other end of the select shaft 5 so as to be non-rotatable and axially movable and connected to a select shift rod of the gear type transmission; Motor 9, an actuator gear 11 for transmitting rotation of the motor 9, and an intermediate shaft 1 connecting the actuator gear 11
2 and a shift gear 14 meshed with the long actuator gear 13
A slider 17 integrally fixed with a female screw 16 screwed with a male screw 15 externally fitted to the shift gear 14 and the select shaft 5, and connected to the slider 17 via a slider bearing 18. A stroke sensor 1 for detecting an axial movement amount of the sleeve 7 and any one of end faces of the shift gear 14, the slider 17, and the sleeve 7.
In the select operation, the shift motor 9 is set in a no-load state, the select stepping motor 2 is operated, the select shaft 5 is rotated, and the select shift is performed via the sleeve 7. Connect the rod to the select sensor 6
In the shift operation, the select stepping motor 2 generates a static force, and the male screw 15 of the select shaft 5 is moved.
In a state in which is held stationary, the shift motor 9 is operated, and the slider 17 rotated by the shift gear 14 via the actuator gear 11 and the long actuator gear 13 is mounted on the male screw 15 of the select shaft 5. Is moved in the axial direction while rotating via the female screw 16, the rotational force of the slider 17 is absorbed by the slider bearing 18, the sleeve 7 moves only in the axial direction, and the select shift rod is An automatic transmission for a gear-type transmission, wherein the automatic transmission is configured to be adjusted to a predetermined shift position by feedback control via the stroke sensor 19. 2. A slide piece (20) that rotatably holds the shift gear (14) across both outer peripheral portions of the shift gear (14) and moves in the axial direction, and guides and holds the slide piece (20) to move in the axial direction. And one end of the housing 1a
And a stroke sensor (19) for holding a contact (19a) on an end face of the slide piece (20) and detecting an axial movement amount of the slider (17). Item 2. An automatic transmission for a gear transmission according to item 1.