KR20020083791A - Shift rail assembly for manual transmission - Google Patents

Abstract

PURPOSE: A shift rail assembly for a manual transmission is provided to simplify the structure by supporting a shift rail and by deciding the shift position, and to cut down expenses by reducing parts. CONSTITUTION: A shift rail assembly of a manual transmission is composed of a transmission housing(45); a shift rail(52) installed in the transmission housing, and moved to the right and the left; a shift lug(54) installed in the shift rail, and connected to a control shaft to move the shift rail; a shift fork(56) mounted in the shift rail to engage a gear with a sleeve of a synchronizer; and a shift rail supporting unit(60) installed between the shift rail and the transmission housing to move the shift rail linearly, and to decide the neutral of the shift fork and shift position. Expenses and parts are reduced with simplifying the structure.

Description

SHIFT RAIL ASSEMBLY FOR MANUAL TRANSMISSION}

The present invention relates to a shift rail assembly of a manual transmission, and more particularly, to a shift rail assembly of a manual transmission which can reduce the number of parts and reduce the cost by simplifying the structure.

In general, the shift control mechanism is a device that transmits the operating force of the shift lever to a manual transmission so that a shift is performed. The select cable and the shift cable transferring the operating force according to the shift operation of the shift lever to the transmission, and the select cable and the shift cable And a control rail assembly connected to the control shaft assembly and a shift rail assembly mounted between the control shaft assembly and the synchronous device of the transmission to operate the synchronous device according to an operation of the control shaft assembly to perform shifting.

1 is a side view of a shift rail assembly according to the prior art.

As shown in FIG. 1, the conventional shift rail assembly includes a transmission housing 5, a shift rail 12 installed on the transmission housing 5 in a lateral direction, and one side of the shift rail 12. A shift lug 14 mounted and connected to the control shaft, a shift fork 16 mounted on the other side of the shift rail 12 to move a sleeve of the synchronizer to engage a gear, and the shift rail 12 Bearings 18 installed at both ends of the shaft to support the shift rail 12 so as to be linearly movable, and between the transmission housing 5 and the shift rail 12 so as to be neutral and shift positions of the shift fork 16. It consists of a positioning mechanism 20 for determining.

Figure 2 is an enlarged view of the positioning mechanism according to the prior art.

As shown in FIG. 2, the positioning mechanism 20 includes shift and neutral position grooves 22, 24, and 26 formed on one side of the shift rail 12, and the grooves 22, 24, and 26, respectively. The ball 32 is inserted to determine the shift position, the coil spring 34 to give a predetermined elastic force to the ball 32, and the fixing bolt 36 for fixing the position of the coil spring 34.

In the positioning mechanism 20, when the neutral and the shift stages are selected according to the operation of the shift lever, the ball 32 moves its position grooves 22, 24, as the shift rail 12 is moved by the bearing 18. 26) and is supported by the elastic force of the coil spring 34 to prevent the jump-out of the gear shift due to the shaking of the shift lever during irregular road driving such as uneven roads and gives a sense of theft during shifting.

However, the shift rail assembly of the manual transmission according to the related art as described above is provided with bearings 18 at both ends for linear movement and support of the shift rail 12, and is positioned for giving a moderation during shifting. When the determination mechanism 20 is installed, the number of parts is increased, thus the cost is increased, and the structure is complicated.

In addition, there is a problem that the ball 32 and the coil spring 34 is damaged by the friction force caused by the contact.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and the object of the present invention is to provide a shift rail assembly of a manual transmission that can reduce the number of parts, reduce costs, and simplify the structure. have.

1 is a side view showing a shift rail assembly according to the prior art,

Figure 2 is an enlarged view of the positioning mechanism according to the prior art,

3 is a side view showing a shift rail assembly according to the present invention;

4 is a cross-sectional view taken along the line A-A of FIG.

<Explanation of symbols on main parts of the drawings>

45: transmission housing 52: shift rail

54: shifting lug 56: shift fork

62,64,66: Groove 72: Ball

74: coil spring 76: ball seat

78: guide

The shift rail assembly of the manual transmission according to the present invention for solving the above problems is provided between the shift housing, the shift rail provided to be movable in the left and right directions on the transmission housing, and the shift rail and the transmission housing are installed between the shift rail and the shift rail assembly. It is possible to support a linear movement and to include a shift rail support means for determining the shift position of the shift fork.

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

3 is a side view of the shift rail assembly according to the invention.

As shown in FIG. 3, the shift rail assembly according to the exemplary embodiment of the present invention includes a transmission housing 45, a shift rail 52 installed on the transmission housing 45 to move left and right, and the shift rail 52. A shifting lug 54 mounted at one side of the shifting shaft and connected to the control shaft to move the shift rail 52 according to the action of the control shaft, and mounted at the other side of the shift rail 52 to move the sleeve of the synchronizer. It is provided between the shift fork 56 which meshes gears, and the shift rail 52 and the transmission housing 45 to support the shift rail 52 so as to be linearly movable, and to neutralize and shift the shift fork 56. It consists of a shift rail support means 60 for determining the position.

4 is a cross-sectional view taken along the line A-A of FIG.

As shown in FIG. 4, the shift rail support means 60 includes a plurality of grooves 62, 64, 66 formed at the ends of the shift rail 52 in the longitudinal direction, and the grooves 62, 64,. A ball 72 inserted into the ball 66 to determine neutral and shift positions, and an elastic member positioned above the ball 72 to impart an elastic force to compress the ball 72 toward the shift rail 52. 74 and the ball seat 76 positioned between the ball 72 and the elastic member 74 to reduce the frictional force generated by the contact of the ball 72 and the elastic member 74.

Here, the ball 72, the elastic member 74 and the ball seat 76 is inserted into the cylindrical projection member 78 formed inside the transmission housing 45 in order to prevent being separated by external factors.

The grooves 62, 64, and 66 are formed to be spaced apart from each other in the longitudinal direction of the shift rail 52, so that the grooves 62, 64, and 66 are supported along the circumferential surface of the shift rail 52 so as to support the shift rail 52 more stably. A plurality is formed to be spaced apart.

Here, four grooves 62, 64, and 66 are formed at equal intervals along the circumferential surface, respectively, and are formed to have a depth at which the shifting feeling can be maintained in an optimal state.

In addition, the grooves 62, 64, and 66 may be formed at both ends of the shift rail 52 in order to improve the sense of theft.

The shift rail assembly of the manual transmission according to the present invention configured as described above can simplify the structure by a shift rail support means in which a function of a positioning mechanism for determining a shift position and a bearing for supporting a conventional shift rail can be simplified. This has the advantage of reducing the cost and the number of parts.

In addition, since the friction can be reduced by the ball seat provided between the ball and the coil spring of the shift rail support means, there is an advantage that the damage of the parts is prevented and the functional aspect thereof is improved.

Claims (6)

A transmission housing; A shift rail mounted to the transmission housing so as to be movable in the left and right directions; And a shift rail support means installed between the shift rail and the transmission housing to support the shift rail to be linearly movable and to determine a shift position of the shift fork. The method of claim 1, The shift rail support means includes a plurality of grooves formed to be spaced apart in the longitudinal direction at the end of the shift rail; Balls respectively inserted into the grooves to determine a shift position; The shift rail assembly of the manual transmission, characterized in that the ball consists of an elastic member for imparting an elastic force to be pressed toward the shift rail. The method of claim 2, The shift rail assembly of the manual transmission, characterized in that the inside of the transmission housing protrudes a cylindrical projection member is inserted into the ball and the elastic member to prevent separation of the ball and the elastic member. The method of claim 2, The groove is a shift rail assembly of the manual transmission, characterized in that a plurality is formed so as to be spaced apart from each other along the circumferential surface of the shift rail, respectively. The method of claim 2, The groove is a shift rail assembly of the manual transmission, characterized in that four formed at equal intervals along the circumferential surface. The method of claim 2, The groove is shift rail assembly of the manual transmission, characterized in that formed on both ends of the shift rail, respectively.