KR20130011755A

KR20130011755A - Gear shifting system of vehicle

Info

Publication number: KR20130011755A
Application number: KR1020110073137A
Authority: KR
Inventors: 이재범
Original assignee: 현대자동차주식회사
Priority date: 2011-07-22
Filing date: 2011-07-22
Publication date: 2013-01-30

Abstract

A shift system of a vehicle according to an exemplary embodiment of the present invention includes a shift rod rotatably disposed about a longitudinal center axis and a spiral groove formed along an outer circumferential surface thereof, and adjacent to the shift rod to rotate the shift rod. A shift motor mounted therein, a groove insertion portion having one end inserted into the spiral groove, the fork disposed to move in the longitudinal direction according to the rotation of the shift rod, and the shift gear disposed to move in the axial direction by the fork. And a shift control unit configured to operate the shift motor so that the shift rod rotates, move the shift gear reciprocally in the axial direction by the fork, and selectively connect the shift gear to an adjacent gear.
Therefore, according to the shift demand of the driver, the motor can be operated to operate the shift rod precisely and stably. In addition, the fork is fastened to the spiral groove formed in the transmission rod, and the fork is stably linearly moved along the spiral groove according to the rotation of the transmission rod, so that the transmission gear can be selectively synchronized with the adjacent gears.

Description

Vehicle shifting system {GEAR SHIFTING SYSTEM OF VEHICLE}

The present invention relates to a transmission system of a vehicle for efficiently transmitting a driving force of a motor or an engine to a driving wheel, and to effectively increase or decrease the torque and rotational speed of the input shaft.

SHIFT ASSEMBLY, which changes the rotation ratio of the input and output shafts, has evolved continuously.

Initially, this shift mechanism includes several shift rails and forks, which are manually operated by the driver to selectively engage the gears in both directions along the shift rail.

With the advent of automatic transmissions, shifting is actually carried out in the transmission, and the driver's role is shifting to the selection of shift modes (D, R, etc.).

On the other hand, as the fork moves, the gears fastened to the forks are fastened to the low gears or the high gears adjacent to both sides, or located in the neutral position. As a mechanism for moving the forks, pneumatic, hydraulic, and motors have been applied.

However, when using a motor, a separate mechanism for stably converting the rotational motion of the motor into the linear motion of the fork is required.

Accordingly, the present invention provides a vehicle transmission system capable of reliably moving a fork of a transmission along a transmission rail by using a motor in accordance with a driver's shift demand.

A shifting system of a vehicle according to the present invention is disposed rotatably about a longitudinal center axis, and is provided with a shifting rod having a spiral groove formed along one outer circumferential surface thereof and mounted adjacent to the shifting rod to rotate the shifting rod. A shift motor, a fork insertion portion having one end inserted into the spiral groove, the fork disposed to move in the longitudinal direction according to the rotation of the shift rod, the shift gear disposed to move in the axial direction by the fork, and the And a shift control unit for operating the shift motor to rotate the shift rod to move the shift gear back and forth in the axial direction by the fork to selectively connect the shift gear to an adjacent gear.

The spiral groove is formed by a guide formed to protrude from the outer circumferential surface of the transmission rod.

Further comprising a bearing disposed at the end of the groove insert of the fork, the bearing slides on the inner side of the helical groove.

It is further disposed between the speed change motor and the speed change rod further includes a speed reducer for reducing the rotational speed of the speed change motor to transmit to the speed change rod.

The shift control unit detects a shift request of a driver and a driving state of the vehicle and operates the shift motor.

The shifting rod, the shifting gear, and the fork may include a case installed therein, and the case may include a front case and a rear case mounted to the front case, and one end of the shifting rod may rotate on the front case. And the other end is rotatably mounted to the rear case.

The shift motor and the reducer are mounted to the front case or the rear case to rotate the shift rod.

In the shift system of the vehicle according to the present invention as described above, according to the shift demand of the driver, the motor can be operated to operate the shift rod precisely and stably.

In addition, the fork is fastened to the spiral groove formed in the transmission rod, and the fork is stably linearly moved along the spiral groove according to the rotation of the transmission rod, so that the transmission gear can be selectively synchronized with the adjacent gears.

1 is a partially exploded perspective view of a transmission system of a vehicle according to an exemplary embodiment of the present disclosure.
2 is a schematic partial detailed side cross-sectional view of a transmission system of a vehicle according to an embodiment of the present invention.

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

1 is a partially exploded perspective view of a transmission system of a vehicle according to an exemplary embodiment of the present disclosure.

Referring to FIG. 1, the shift system includes a shift motor 100, a speed reducer 110, a shift rod 120, a shift fork 130, a shift gear 132, a rear case 140, a front case 150, And a transmission gear unit 160.

The transmission gear unit 160 is disposed in the rear case 140 and the front case 150, and the transmission gear 132 included in the transmission gear unit 160 reciprocates along a rotation axis. Is placed.

The transmission gear 132 is moved along the axis of rotation by the fork 130, is coupled to the first gear 134 by moving in one direction, or coupled to the second gear 136 by moving in the other direction.

As the transmission gear 132 is selectively coupled to the first gear 134 or the second gear 136, the gear is synchronized to perform shifting. If the transmission gear 132 is located in the middle and is not synchronized with the first gear 134 or the second gear 136, it is in a neutral state.

The speed reducer 110 that reduces the output speed of the speed change motor 100 is fastened to the speed change motor 100, and the speed reducer 110 rotates the speed change rod 120 to rotate the speed change rod 120. ).

The speed change rod 120 is rotated by the speed reducer 110 to reciprocate the fork 130 and the speed change gear 132 in the rotation axis direction.

When the driver operates the shift lever, the transmission control unit 220 (TCU: transmission control unit) operates the shift motor 100 according to the operating state, and operates the shift rod 120 through the speed reducer 110. Rotate clockwise or counterclockwise.

When the transmission rod 120 rotates in the clockwise direction, the fork 130 and the transmission gear 132 are moved in one direction so that the transmission gear 132 is synchronized with the first gear 134 and the transmission rod. When the 120 rotates counterclockwise, the fork 130 moves the transmission gear 132 in the other direction so that the transmission gear 132 is synchronized with the second gear 136.

2 is a schematic partial detailed side cross-sectional view of a transmission system of a vehicle according to an embodiment of the present invention.

2, the shift motor 100 rotates by the shift control unit 220 to rotate the shift rod 120, and the fork 130 and the shift by the shift rod 120. The transmission gear 132 moves left and right.

As shown, the outer circumferential surface of the speed change rod 120 is formed with a spiral groove 200, the guide 210 is formed to protrude along the edge along the spiral groove 200.

The fork 130 has a groove inserting portion 230 inserted into the spiral groove 200 protruding from the upper portion, and a bearing 240 is mounted at the end of the groove inserting portion 230.

When the speed reducer 110 rotates the shift rod 120 in a clockwise or counterclockwise direction, the fork 130 and the shift gear 132 are right or left directions along the shift rod (in FIG. 2). To move.

Therefore, the transmission gear 132 fastened to the fork 130 is selectively fastened to the first and second gears 134 and 136.

The bearing 240 is formed in the groove inserting portion 230 formed in the upper portion of the fork 130, and the bearing 240 slides on an inner surface of the spiral groove 200, so that the fork 130 is formed. Is to be able to move stably and smoothly by the transmission rod (120).

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, And all changes to the scope that are deemed to be valid.

100: variable speed motor
110: reducer
120: shifting rod
130: fork
132: transmission gear
134: first gear
136: second gear
140: rear case
150: front case
160: transmission gear unit
200: spiral groove
210: guide
220: shift control unit
230: groove insert
240: bearing

Claims

A shifting rod rotatably disposed with respect to the longitudinal center axis and having a spiral groove formed along one outer circumferential surface thereof;
A shift motor mounted adjacent to the shift rod to rotate the shift rod;
A fork groove having one end inserted into the spiral groove and disposed to move in the longitudinal direction according to the rotation of the transmission rod;
A transmission gear disposed to move axially by the fork; And
A shift control unit operating the shift motor to rotate the shift rod to move the shift gear reciprocally in the axial direction by the fork to selectively connect the shift gear to an adjacent gear; Transmission system of a vehicle comprising a.

In claim 1,
The spiral groove is a vehicle shift system, characterized in that formed by a guide formed protruding on the outer circumferential surface of the speed change rod.

In claim 1,
And a bearing disposed at an end of the groove insert of the fork, wherein the bearing slides on an inner side surface of the helical groove.

In claim 1,
And a speed reducer disposed between the speed change motor and the speed change rod to reduce the rotational speed of the speed change motor and transmit the reduced speed to the speed change rod.

In claim 1,
The shift control unit detects a shift request of a driver and a driving state of the vehicle and operates the shift motor.

In claim 1,
The shift rod, the shift gear, and the fork are provided with a case installed therein, the case includes a front case and a rear case mounted to the front case,
One end of the shift rod is rotatably mounted to the front case, the other end is rotatably mounted to the rear case.

The method of claim 6,
And the speed change motor and the speed reducer are mounted to the front case or the rear case to rotate the speed change rod.