KR20140080267A

KR20140080267A - A parking device for an electric vehicle

Info

Publication number: KR20140080267A
Application number: KR1020120149876A
Authority: KR
Inventors: 신제운; 최민식
Original assignee: 현대위아 주식회사
Priority date: 2012-12-20
Filing date: 2012-12-20
Publication date: 2014-06-30

Abstract

According to the present invention, there is provided a parking apparatus for an electric vehicle in which the power of a drive motor is transmitted to an output shaft through a drive gear and a hub in a transmission housing, A shift cam connected to the shift motor to rotate and having a cam having a groove on one side; A shift fork restrained by a groove of the cam and moving forward and backward; A synchromesh mechanism including an inner circumferential surface of the shift fork mounted on an outer circumferential surface, and a sleeve interlocked with the shift fork and normally engaged with the hub; And a control unit that is fixedly coupled to the inside of the transmission housing (an output shaft of the output shaft) and operates the shift motor in accordance with a P-type shift signal of the shift lever. When the shift motor is operated, the shift fork is combined with the sleeve, And a stationary clutch for restricting the output shaft.
According to this, the parking system can be simplified by using the fixed clutch fixedly installed inside the transmission, and the conventional mechanical type can be improved electronically to improve the operational feeling of the user.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a parking device for an electric vehicle,

The present invention relates to a parking apparatus for an electric vehicle.

Generally, an electric vehicle also has a separate parking brake device used in gasoline or diesel engine vehicles.

As a kind of parking brake, a mechanical parking apparatus is mainly applied, which is implemented in such a manner that the parking gear and the parking sprocket are interlocked by the force that the user operates the shift lever in the P-stage.

Such a conventional mechanical parking device for an electric vehicle has a problem in that the size is large, the structure is complicated, and the operation feeling is deteriorated because it depends on the force of the user.

It is an object of the present invention to provide a parking apparatus for an electric vehicle that can be implemented with a simple structure and can improve a user's operation feeling.

According to an aspect of the present invention, there is provided a parking apparatus for an electric vehicle,

In which power of a drive motor is transmitted to an output shaft (O) through a drive gear (G) and a hub (H) in a transmission housing (B)

A shift motor (10) driven in a normal direction;

A shift cam 20 connected to the shift motor 10 to rotate and provided with a cam 21 having a groove 21a at one side thereof;

A shift fork 30 restrained by the groove 21a of the cam 21 and moving forward and backward;

A synchromesh mechanism (40) including an inner circumferential surface of the shift fork (30) mounted on an outer circumferential surface, and a sleeve (41) interlocked with the shift fork (30) and normally engaged with the hub (H); And

When the shift motor 10 is operated in accordance with the P-speed shifting signal of the shift lever and is fixedly coupled to the inside of the transmission housing B (the output portion of the output shaft O), by the movement of the shift fork 30 A fixed clutch (50) which is combined with the sleeve (41) and restrains the output shaft (O) splined to the hub (H);

.

The shift fork 30 is slidably mounted on a shift rail 35 fixed to the transmission housing B.

The shift fork (30) has a lug portion that is seated on the outer peripheral surface of the sleeve (41).

The synchromesh mechanism 40 includes a gear clutch 42 integrally provided with the drive gear G and engageable with the sleeve 41.

The fixed clutch (50) has a gear (51) that engages with the sleeve (41) on its outer circumferential surface.

As described above, according to the parking apparatus for an electric vehicle according to the present invention, it is possible to simplify the parking system using the fixed clutch fixedly installed in the transmission, and to improve the operation feeling of the user by improving the conventional mechanical type electronically There are advantages to be able to.

1 is a sectional view showing a neutral state of a parking apparatus for an electric vehicle according to an embodiment of the present invention,
FIG. 2 is an enlarged view of a portion II of FIG. 1,
3 is an operation diagram showing the parking state of Fig. 1 and Fig.
4 is a perspective view of the main part of Fig.

Hereinafter, a parking apparatus for an electric vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It should be understood that various equivalents and modifications may be present.

The parking apparatus for an electric vehicle according to the present invention is configured to block the power of a drive motor (not shown) from being transmitted to the output shaft O through the drive gear G and the hub H in the transmission housing B.

1, a parking apparatus for an electric vehicle according to an embodiment of the present invention includes a shift motor 10, a shift cam 20, a shift fork 30, (40) and a stationary clutch (50).

Here, the shift cam 20 is connected to the shift motor 10 to rotate forward and backward, and a cam 21 having a groove 21a for neutral, first or second, and parking is provided on one side.

The shift fork 30 is provided at one side thereof with a protruding portion 31 constrained to a groove 21a of the cam 21 and interlocked with the cam 21, (Not shown) that is slidably mounted on the sleeve 35 and is movable forward and backward and which is seated on the outer circumferential surface of the sleeve 41 is provided on the other side.

The synchromesh mechanism 40 includes a sleeve 41 on the outer circumferential surface of which the inner circumferential surface of the shift fork 30 is seated and interlocked with the shift fork 30. The sleeve 41 is splined to the hub H so that the inner circumferential surface of the sleeve 41 can always engage with the hub H.

The synchromesh mechanism 40 may further include a gear clutch 42 integrally formed with the drive gear G and engageable with the sleeve 41.

2, the fixed clutch 50 is fixedly coupled to the inside (the outlet portion of the output shaft O) of the transmission housing B so as to be shifted in accordance with the P-speed shifting signal of the shift lever, When the motor 10 is operated, the shift fork 30 is moved to move the sleeve 41 to restrain the output shaft O spline coupled to the hub H by the movement of the shift fork 30.

To this end, a gear 51 is formed on the outer circumferential surface of the fixed clutch 50 so as to engage with the inner circumferential surface of the sleeve 41.

Hereinafter, the operation of the parking apparatus for an electric vehicle of the present invention described above with reference to the drawings will be described.

When the user operates the shift lever in the neutral state to perform the one-speed shift operation, the shift motor 10 is rotated in the forward direction (the direction opposite to the arrow in FIG. 3) by the electric signal, Is engaged with the gear clutch 42 while sliding on the right side of Fig. 4 while being restrained by the lug portion of the gear 30, so that one-stage or two-stage shifting is performed.

The power of the drive motor (not shown) is transmitted to the output shaft O through the drive gear G to the hub H, which is normally engaged with the sleeve 41 via the gear clutch 42 and the sleeve 41 The power can be transmitted, and the power finally transmitted to the output shaft O is provided to the differential device (not shown).

3 and 4, when the user performs the P stage (parking range shift) operation through the neutral position of the shift lever, the shift motor 10 moves in the reverse direction ).

At this time, the sleeve 41 is released from engagement with the gear clutch 42 (refer to FIG. 1) according to the neutral of the shift lever, and the shift fork 30 and engages with the fixed clutch 50 fixedly coupled to the inside of the transmission housing B (the output portion of the output shaft O).

Therefore, the hub H, which is in constant contact with the sleeve 41, is also restrained by the fixed clutch 50 so that the output shaft O is fixed and the parking state of the vehicle can be maintained.

According to the parking apparatus for an electric vehicle as described above, it is possible to simplify a parking system using a fixed type clutch fixedly installed in the transmission, and to improve the operation feeling of the user by improving the conventional mechanical type electronically There is an advantage.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those of ordinary skill 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 by the appended claims. It is to be understood that various changes and modifications may be made without departing from the scope of the present invention.

Claims

In which power of a drive motor is transmitted to an output shaft (O) through a drive gear (G) and a hub (H) in a transmission housing (B)
A shift motor (10) driven in a normal direction;
A shift cam 20 connected to the shift motor 10 to rotate and provided with a cam 21 having a groove 21a at one side thereof;
A shift fork 30 restrained by the groove 21a of the cam 21 and moving forward and backward;
A synchromesh mechanism (40) including an inner circumferential surface of the shift fork (30) mounted on an outer circumferential surface, and a sleeve (41) interlocked with the shift fork (30) and normally engaged with the hub (H); And
When the shift motor 10 is operated in accordance with the P-speed shifting signal of the shift lever and is fixedly coupled to the inside of the transmission housing B (the output portion of the output shaft O), by the movement of the shift fork 30 A fixed clutch (50) which is combined with the sleeve (41) and restrains the output shaft (O) splined to the hub (H);
And a parking mechanism for the electric vehicle.

The shift fork (30) according to claim 1, wherein the shift fork (30)
And a shift rail (35) fixed to the transmission housing (B).

The shift fork (30) according to claim 1, wherein the shift fork (30)
And a lug portion that is seated on an outer circumferential surface of the sleeve (41).

The synchronizing device according to claim 1, wherein the synchromesh mechanism (40)
And a gear clutch (42) integrally provided with the drive gear (G) and engageable with the sleeve (41).

2. The automatic transmission according to claim 1, wherein the fixed clutch (50)
And a gear (51) engaged with the sleeve (41) on an outer peripheral surface thereof.