KR20150015312A

KR20150015312A - Automatic manual transmission

Info

Publication number: KR20150015312A
Application number: KR1020130091228A
Authority: KR
Inventors: 신제운
Original assignee: 현대위아 주식회사
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2015-02-10

Abstract

The present invention discloses an automatic manual transmission having a structure capable of improving shift accuracy and preventing occurrence of synchroclash. The automatic manual transmission according to the present invention includes a selecting actuator and a shifting actuator; A control shaft which is moved in the axial direction by the selecting actuator and is rotated by the shifting actuator; A selecting mechanism for moving the control shaft in the axial direction in accordance with the operation of the selecting actuator; A shift finger mounted on the control shaft; A plurality of shift lugs each having a first end connected to a shift finger; A plurality of shift rails to which a second end of the shift lug is connected; And a synchro fork mounted on the shift rail. The automatic manual transmission according to the present invention may further include shift catch preventing means installed on the shifting shaft for preventing the occurrence of the clash between the shift finger and the shift lug.

Description

[0001] Automatic manual transmission [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic manual transmission, and more particularly, to an automatic manual transmission having a structure capable of improving shift accuracy and preventing occurrence of synchroclash.

The torque generated by the engine for an automobile is substantially constant regardless of the change in the rotational speed, and the output has a characteristic that the output varies greatly depending on the rotational speed.

A driving force required when the automobile travels greatly changes depending on the road conditions and the traveling speed in the state in which the passenger and the cargo are loaded. Therefore, a device for changing the torque between the engine and the wheel is required in order to cope with the situation. Such a transmission is a transmission, which can be roughly divided into a manual transmission, an automatic transmission, and an automatic manual transmission.

The manual transmission is a transmission in which the driver manually changes the gear. When shifting, it is necessary to operate the clutch by disengaging the shift actuator and the engine, then changing the gear and then powering the clutch again. Through this process, the manual transmission is shifted through the above process, so it is difficult for an untrained driver to shift. However, drivers who want quick response or high fuel economy prefer this manual transmission because they can better utilize the engine's capabilities compared to automatic transmissions.

The automatic transmission changes the gear position automatically according to the predetermined shift pattern according to the degree of depression of the accelerator pedal and the vehicle speed, and the shifting process is performed by the hydraulic device.

Recently, a continuous variable transmission capable of realizing smooth acceleration without a shift shock by a pulley having a belt and an inclined gear without using a gear has been developed in order to compensate for the disadvantage of an automatic transmission, Which automates both the clutch and shift lever operations in Semi Automatic Transmission (SAT) and manual transmissions where the clutch pedal is absent, that is, the shift is manually operated by the driver, but the transmission operator does not have to step on the clutch An Automated Manual Transmission (AMT) has been developed and commercialized.

In particular, the automatic manual transmission uses a manual transmission as it is, while automatically controlling the shift lever using an actuator driven by a hydraulic or electric drive. Thus, while maintaining the advantages of the fuel economy of a manual transmission, I have.

As an example of an automatic manual transmission, there is disclosed a technology for enabling automatic manual transmission to be implemented in a small size by allowing a fork, which requires a relatively small operating force, to be driven by an electromagnetic force, Quot; Automatic Shift Transmission of an Automatic Manual Transmission ", published by the applicant of the present invention, published on Jul. 25, 2013 (published on July 25, 2013).

When a hungary shift occurs in such an automatic manual transmission, precise control of the position and movement of the actuator is required. When the motor and the motor or the solenoid valve operate together in the shifting action and therefore the position control of the shift finger and the control of the movement amount of the actuator are not precisely performed, Can proceed. Under these conditions, a shift clash occurs.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems occurring in an automatic manual transmission, and to provide an automatic manual transmission having a structure capable of improving shift accuracy and preventing occurrence of synchroclash.

To achieve the above object, according to the present invention, there is provided an automatic manual transmission including a selecting actuator and a shifting actuator; A control shaft which is moved in the axial direction by the selecting actuator and is rotated by the shifting actuator; A selecting mechanism for moving the control shaft in the axial direction in accordance with the operation of the selecting actuator; A shift finger mounted on the control shaft; A plurality of shift lugs each having a first end connected to a shift finger; A plurality of shift rails to which a second end of the shift lug is connected; And a synchro fork mounted on the shift rail.

In particular, the selecting mechanism may move the control shaft in the axial direction while the selecting actuator is not operated, so that the shift finger may correspond to the shift rail of the other stage.

Here, the selecting actuator includes a driving unit, a worm connected to the driving shaft of the driving unit, and the shifting actuator includes a driving unit, a worm coupled to the driving shaft of the driving unit, and a worm coupled to the worm gear mounted on the shifting shaft.

In addition, the selecting mechanism includes a worm gear engaged with a worm of the selecting actuator, a spring whose first end is fixed to the worm gear, and a selector lever fixed to the second end of the spring and housed in a cam portion whose end portion is mounted on the control shaft .

The automatic manual transmission according to the present invention may further include a shifting clash preventing means installed in the shifting shaft for preventing the occurrence of the clash between the shift finger and the shift lug.

The shift-clash preventing means includes a shift finger receiving portion accommodated in a shift finger receiving portion formed in the shift lug and having a shift finger placed therein; And a leaf spring disposed on at least one of the outer surface of the shift finger and the corresponding inner surface of the finger cover.

In the automatic manual transmission according to the present invention having the above-described structure, when the shifting finger moves from one shift rail to another shift rail for shifting, a shifting finger is moved by a spring rather than a separate driving unit (motor or solenoid valve) So that the shifting can be accurately performed.

Also, in the automatic manual transmission according to the present invention, the rotational force of the shifting shaft is transmitted to the shift lug through the spring, not the shifting finger, thereby generating a collision or a sound of collision due to the contact between the shifting shifting finger and the fixed shift lug Can be prevented.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a configuration of an automatic manual transmission according to an embodiment of the present invention; FIG.
2 is a detailed view of the portion "A" in Fig.
3A to 3D schematically show a change in position of a shift finger whose position changes according to the operation of the selecting actuator and the shifting actuator
Figs. 4A to 4D are diagrams showing a change in position of each constituent member during a shifting process in Figs. 3A to 3D; Fig.
FIG. 5A is a partial view showing the relationship between the control shaft, the shift finger, the shift lug, and the shift inhibiting means shown in FIG. 1; FIG.
Figs. 5B and 5C are views corresponding to Figs. 5A and 5A, 5B and 5C, respectively, showing a modified state of the speed change preventing means according to the rotation of the shifting finger.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure and functions of an automatic manual transmission according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing a configuration of an automatic manual transmission according to an embodiment of the present invention, which includes two actuators, a control shaft operated by an actuator, a shift lug and a shift finger connected to the control shaft, two shift rails and a shift Only the synchronous fork mounted on the rail is shown.

An automatic manual transmission according to an embodiment of the present invention includes a selecting actuator 10 and a shifting actuator 20. [

The selecting actuator 10 comprises a driving unit 11 and a worm 13 connected to the driving shaft 12 of the driving unit 11. [ The shifting actuator 20 includes a driving unit 21 and a worm 23 connected to the driving shaft 22 of the driving unit 21.

A worm gear 33 meshing with the worm 23 of the shifting actuator 20 is installed on the upper end of the control shaft 30 mounted on the transmission case (not shown) so as to be movable in the axial direction And a cam portion 34 is attached to a lower portion of the worm gear 33. [

Fig. 2 is a detailed view of the portion "A" in Fig. 1, showing the relationship between the selecting actuator 10 and the control shaft 30. Fig.

A selecting mechanism 40 is disposed below the selecting actuator 10. The selecting mechanism 40 includes a worm gear 43 meshing with a worm 13 of the selecting actuator 10, an elastic member 42 (e.g., spring) having a first end fixed to the worm gear 43, And a selection lever 41 fixed to the second end of the elastic member 42. [ Here, the terminating end of the selecting lever 41 is accommodated in the cam portion 34 mounted on the control shaft 30. [

The automatic manual transmission according to the embodiment of the present invention includes a shift finger 50 mounted on the control shaft 30, a plurality of shift lugs 60 each having a first end connected to the shift finger 50, And a synchro fork 80 mounted on each shift rail 70. The first and second shift rails 70,

The shift lug 60 includes a 1-2 step shift lug and a 3-4 step shift lug, and the shift rail 70 is composed of a 1-2 step shift rail and a 3-4 step shift rail.

The shift lug (60) is supported by a corresponding shift rail (70). That is, the 1-2 stage shift lug is supported on the 1-2 stage shift rail, and the 3-4 stage shift lug is supported on the 3-4 stage shift rail.

A shift finger (50) mounted on the control shaft (30) is engaged with the shift lug (60). Accordingly, the shift finger 60 is shifted in accordance with the rotation and movement of the control shaft 30,

Thereby imparting an operating force to the lug 60.

The shift finger 60 corresponds to a shift lug 60 mounted on the shift rail 70 via a control shaft 30 moving in the vertical direction. Thus, the shift fingers 60 can push the corresponding shift lugs 60 and the shift forks 80 mounted on the shift rails 70 in accordance with the advancement of the shift lugs 60 are engaged in the sleeve (Not shown).

The detailed configuration, functions and interrelationships of the control finger 50, the shift lug 60, the shift rail 70, and the synchronous fork 80 performing the above functions are the same as those of the corresponding constituent members constituting the general transmission, Therefore, a description thereof will be omitted.

The shifting function in the automatic manual transmission according to the embodiment of the present invention will be described with reference to the accompanying drawings.

FIGS. 3A to 3D are views schematically showing a change in position of a shift finger 60 whose position changes according to the operation of the selecting actuator 10 and the shifting actuator 20. FIG.

For example, the driver manipulates the lever in order to shift the vehicle while driving in two stages. Here, as shown in FIG. 3A, when the vehicle is traveling in two stages, the control finger 50 corresponds to the shift lug 52 corresponding to the second gear.

By the operation of the lever, the transmission control unit operates the selecting actuator 10 first. The selecting lever 41 of the selecting mechanism 40 is rotated by the operation of the driving unit 11 of the selecting actuator 10. [

The worm gear 43 engaged with the worm 13 is rotated by the operation of the driving unit 11 of the selecting actuator 10 and the spring 42 fixed to the worm gear 43 is rotated, .

The driving portion 21 of the shifting actuator 20 is operated so that the control shaft 30 is rotated by the worm gear 33 connected to the worm 23 of the shifting actuator 20. [ The shift fingers 60 are separated from the two-stage shift lugs 60 mounted on the shift rails 70 and are placed in the neutral state (the state shown in Fig. 3B) in accordance with the rotation of the control shaft 30. Fig.

In this neutral state, the control shaft 30 can move in the vertical direction, i.e., in the lateral direction, by the spring 42 of the selecting mechanism 40, And corresponds to the fourth-stage shift rail (the state shown in Fig. 3C).

In this state, when the driving part 21 of the shifting actuator 20 is operated again, the control shaft 30 is rotated by the worm gear 33 connected to the worm 23 of the shifting actuator 20, In accordance with the rotation of the shaft 30, the shift finger 50 corresponds to the three-stage shift lug 63 mounted on the shift rail 70 (the state shown in Fig. 3D).

Thereafter, as the shift lug 63 is pushed, the shift fork 80 mounted on the shift rail 70 operates the sleeve in the synchromesh mechanism to perform the three-speed shifting.

FIGS. 4A to 4D are diagrams showing the positional change of each structural member during the shifting process in FIGS. 3A to 3D. FIG.

The shifting from the third stage to the second stage is performed only through the same process as above except that the shifting direction of the driving unit 11 of the selecting actuator 10 and the shifting unit 21 of the shifting actuator 20 are opposite. It is needless to say that the shift on the same shift rail, that is, the shift from the first stage to the second stage and the shift from the third stage to the fourth stage are performed only by the operation of the shifting actuator 20. [

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0029] Hereinafter, a shift inhibiting means constituting an automatic manual transmission according to an embodiment of the present invention will be described.

5A is a partial view showing the relationship of the control shaft 30, the shift finger 50, and the shift lugs 61 and 62 shown in FIG. 1, and FIGS. 5B and 5C are partial views of the shifting finger 50 Fig. 5 is a view showing a deformation state of the speed change preventing means according to the rotation;

A shift finger 60 mounted on the control shaft 30 is disposed in the shift finger receiving portion 61-1 formed in the shift lug (for example, 61). A finger cover 51 accommodated in the shift finger receiving portion 61-1 is positioned at an outer portion of the shift finger 60. Both side portions of the finger cover 51 are engaged with the shift finger receiving portion 61-1, As shown in FIG.

On the other hand, leaf springs 101 and 102, which are means for preventing shifting clash, are disposed on both outer surfaces of the shift fingers 60 and inner surfaces of both sides of the finger covers 51, respectively.

When the shifting actuator 20 is operated for shifting as described above, the control shaft 30 rotates, and therefore, the shift finger 50 also rotates in the same direction. At this time, as the shift finger 50 rotates in the non-rotating finger cover 51, the spring 102 arranged in the rotating direction is pressed by the shifting finger 50 (state of FIG. 5B).

When the shifting actuator 20 continues to operate, the spring 102 exerts a force on the shifting groove 61-1 through the finger cover 51, and accordingly, as the shift lug 61-1 is pushed, The shift fork 80 mounted on the shift lever 70 operates the sleeve in the synchromesh mechanism to perform shifting (state of FIG.

This state, that is, the state in which the fingers 102 apply force to the shifting love 61-1 through the finger cover 51, continues until the shifting ends.

As described above, the rotational force of the shifting shaft 30 is transmitted to the shift lug (61-1 in FIG. 5) through the resilient springs 101 and 102, not the shifting finger 50, The clash (collision or collision sound) due to the contact between the finger 50 and the fixed shift lug 61-1 is prevented.

It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

In an automated manual transmission,
A selecting actuator and a shifting actuator;
A control shaft which is moved in the axial direction by the selecting actuator and is rotated by the shifting actuator;
A selecting mechanism for moving the control shaft in the axial direction in accordance with the operation of the selecting actuator;
A shift finger mounted on the control shaft;
A plurality of shift lugs each having a first end connected to a shift finger;
A plurality of shift rails to which a second end of the shift lug is connected; And a synchronous fork mounted on the shift rail,
Wherein the selecting mechanism is capable of axially moving the control shaft in a state in which the selecting actuator is not operated so that the shift finger can be matched to the shift rail of the other stage.

The shift actuator according to claim 1, wherein the selecting actuator includes a driving part and a worm connected to a driving shaft of the driving part, wherein the shifting actuator includes a driving part, a worm coupled to a driving shaft of the driving part, Features an automatic manual transmission,

2. A worm gear as set forth in claim 1, wherein the selecting mechanism comprises a worm gear engaged with a worm of the selecting actuator, a spring having a first end fixed to the worm gear and a second end fixed to the second end of the spring, And a selector lever.

The automatic manual transmission according to claim 1, further comprising a shift-clash preventing means installed in the shifting shaft for preventing a clash between the shift finger and the shift lug.

5. The shift control apparatus according to claim 4,
A shift finger receiving portion accommodated in a shift finger receiving portion formed in the shift lug and having a shift finger disposed therein; And
And a leaf spring disposed on at least one of the outer side surface of the shift finger and the corresponding inner surface of the finger cover.