KR20190065670A - Shift operating apparatus for manual transmission - Google Patents

Abstract

According to the present invention, a shift operating apparatus for a manual transmission comprises: a control shaft connected to a shift lever to rotate; a control finger provided on the control shaft to slide in an axial direction according to rotation of a select finger, and provided to rotate along with the control shaft; and a plurality of shift lugs individually provided on a plurality of shift rails, and having a lug groove into which the control finger is selectively inserted. The shift lugs are formed for a height of the lug groove to be different from each other.

Description

[0001] SHIFT OPERATING APPARATUS FOR MANUAL TRANSMISSION [0002]

The present invention relates to a shift operating mechanism of a manual transmission that reduces the gear summing force for each gear position to improve the driver's feeling of downshift operation.

BACKGROUND ART [0002] Generally, a vehicle is provided with a transmission for converting engine power into an appropriate driving force, and the transmission is divided into a manual transmission, an automatic transmission, and a continuously variable transmission according to an operation method.

The shift operating mechanism applied to the manual transmission includes a select cable and a shift cable for transmitting an operation force corresponding to a shift operation of the shift lever to the transmission, And a control shaft assembly connected to the select and shift cables.

The control shaft assembly is linked to a shift lever and linked to the rotation and axial movement of a control shaft that performs a linear reciprocating motion and a rotational motion by the operation force of the shift lever, And a shift rail for transmitting the signal.

A control finger is mounted on the control shaft, and a shift lug is mounted on the shift rail, the shift lug being in contact with the control finger to receive the operation force. On the shift rail, a fork that is in contact with a synchromesh mechanism provided for each speed change stage is mounted.

In general, the insertion groove of the shift lug is formed such that the control finger is inserted, and the size and depth of the insertion groove are constant. Therefore, when the lower gear having a larger gear ratio is engaged than when the higher gear is meshed, the driver feels that it is difficult for the driver to relatively operate the gearshift lever.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

KR10-2005-0046397A

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve such a problem, and it is an object of the present invention to provide a shift operating mechanism of a manual transmission that improves the feeling of operation of a downshift gear of a vehicle by diversifying the height of a lug groove of a shift lug, The purpose is to provide.

In order to accomplish the above object, according to one aspect of the present invention, there is provided a shift operating mechanism of a manual transmission, including: a control shaft connected to and rotating with a shift lever; A control finger provided on the control shaft and slidable in the axial direction according to the rotation of the select finger, and configured to rotate with the control shaft; And a plurality of shift lugs respectively provided on the plurality of shift rails and formed with lug grooves into which the control fingers are selectively inserted, wherein the plurality of shift lugs are formed such that the height of the lug grooves is different from each other . ≪ / RTI >

And the lug grooves of the plurality of shift lugs may be formed such that the bottom surfaces are formed at a horizontal height with respect to each other.

The control finger may be formed to have protrusions protruding from both sides of the plurality of shift lugs at positions corresponding to the upper side of the lug grooves.

The protrusions may protrude from the central axis of the control finger in a radial direction.

The lug grooves of the plurality of shift lugs may have a larger width as the height of the lug grooves increases.

And the lug grooves of the plurality of shift lugs are formed to have a height difference from the lug grooves of the adjacent shift lugs by a set height.

The plurality of shift lugs may be formed such that the height of the lug grooves is increased as the speed change stages to be implemented are provided on the lower shift rails.

According to the shift operating mechanism of the manual transmission having the above-described structure, it is possible to improve the operability of the down-shifting step of the vehicle, thereby improving the vehicle commerciality.

Further, in order to improve the gear tooth force as in the prior art, it is not necessary to apply a double synchro device or a triple synchro device having a large number of friction surfaces, so that it is possible to reduce the component cost and volume while improving the gear tooth force.

1 is a perspective view illustrating a shift operation mechanism of a manual transmission according to an embodiment of the present invention;
FIG. 2 is a front view of a control finger and a shift lug according to an embodiment of the present invention. FIG.
FIG. 3 is a side view of a control finger and a shift lug according to an embodiment of the present invention. FIG.
FIG. 4 is a perspective view showing a shift operation mechanism of a manual transmission in a case where a control finger is pulled into a low-stage side shift lug in the present invention,
5 is a perspective view showing a shift operation mechanism of a manual transmission when a control finger is pulled into a high-stage side shift lug in the present invention.

Hereinafter, a shift operation mechanism of a manual transmission according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 2 is a front view of a control finger and a shift lug according to an embodiment of the present invention. FIG. 3 is a cross- A control finger and a shift lug according to an embodiment of the present invention.

1 to 3, the speed change operation mechanism of the manual transmission of the present invention includes a control shaft 10 connected to the shift lever 12 to rotate; A control finger (20) provided on the control shaft (10) and sliding in the axial direction according to the rotation of the select finger (14) and rotating with the control shaft (10); And a plurality of shift lugs (30) provided on the plurality of shift rails (40) and each having a lug groove (32) in which the control finger (20) is selectively inserted, The lugs 30 may have different heights of the lug grooves 32.

The shift lever 12 is connected to a shift cable (not shown) connected to the shift lever and rotates. The select finger 14 receives power from a select lever connected to a select cable (not shown) connected to the shift lever, .

Accordingly, as the driver operates the shift lever, the shift lever 12 and the select finger 14 rotate while the shift cable and the select cable move, and the control finger 20 provided on the control shaft 10 accordingly rotates. So as to select one of the plurality of shift lugs 30 to transmit the force in the shift direction.

When one of the plurality of shift lugs 30 receives a shift direction force from the control finger 20, the shift rail 40 connected thereto is moved in the shift direction and the fork (Not shown) moves the sleeve of the synchromesh device (not shown) to engage the speed change gear to effect shifting.

The shift lugs 30 of the present invention are formed with lug grooves 32 to allow the control fingers 20 to be drawn in. The lug grooves 32 are designed to have different heights so that the control fingers 20 are provided for each shift lug 30, And the point at which the force is transmitted through the two points are designed to be different from each other.

As the point at which the control finger 20 contacts the shift lug 30 and transmits the force is closer to the center axis of the control finger 20, the force transmitted to the shift lug 30 with respect to the same force increases, The shift can be performed even with the force, and the vehicle transmission feeling is improved.

Specifically, in the present invention, the lug grooves 32 of the plurality of shift lugs 30 may be formed such that their bottom surfaces are formed at horizontal heights.

The control finger 20 may be provided with protrusions 22 protruding from both sides of the shift lugs 30 at positions corresponding to the upper side of the lug grooves 32.

That is, the shift operating mechanism of the manual transmission of the present invention is configured such that the plurality of shift rails 40 and the shift lugs 30 are formed to have the same height horizontally with respect to each other, and the lug grooves 32 of the shift lugs 30, The height of the control fingers 20 may be set to be different from each other according to the height of the incoming lug grooves 32 so that the gear tooth force can be reduced.

A plurality of protrusions 22 are formed along the radial direction of the control finger 20. The protrusions 22 are formed at points where the upper ends of the plurality of lug grooves 32 can abut against each other, So that the lug 30 abuts against the lug groove 32 at a minimum radius of the control finger 20 to transmit the force.

Therefore, the rotational force can be transmitted to each of the shift lugs 30 at a radius of the different control fingers 20. [

In addition, the projections 22 of the present invention may be characterized in that the protruding amount of the protrusions 22 is larger as the protrusions 22 are located closer to the center axis of the control finger 20 in the radial direction.

In other words, when the control fingers 20 are rotated, the protrusions 22 are designed to have a greater protrusion amount as the center of the control fingers 20 approaches the central axis of the control fingers 20, So that the projections close to each other can come into contact with the lug grooves 32 of the shift lug 30 first.

However, the protrusion 22 formed at a position higher than the height of the lug groove 32 of the selected shift lug 30 does not come into contact with the lug groove 32 even when the control finger 20 is rotated, 20 can transmit rotational forces to different shift lugs 30 at different radii.

In addition, the lug grooves 32 of the plurality of shift lugs 30 may have a larger width as the height thereof increases.

That is, if the widths of the lug grooves 32 of the plurality of shift lugs 30 are designed to be equal to each other in a state in which the protrusions 22 are formed to be different from each other, the control finger 20 has a rotation angle They will be different from each other.

Therefore, in the present invention, the lug grooves 32 are formed so that the height of the lug grooves 32 is greater than the height of the lug grooves 32, so that the lug grooves 32 are designed to contact the shift lug 30 only when the control finger 20 rotates at the same rotation angle. Accordingly, it is possible to prevent the shift from being completed even if the driver does not complete the operation of the shift lever, or the shift is not performed even when the operation is completed.

For example, referring to FIGS. 1 and 2, the shift rail 40 includes first, second and third shift rails 40a, 40b, and 40c, and the shift lug 30 includes first and second The shift ratio which is the ratio of transmitting the power to the control finger 20 through the shift lever 12 is determined by the rotation radius y of the shift lever 12 ) Divided by the power transmission radius of the control finger (20).

If the control finger 20 is pulled into the first shift lug 30a, the first projection 22a contacts the first lug groove 32a first, and the shift ratio is set such that the rotation of the shift lever 12 (Y / a) obtained by dividing the radius y by the distance a between the central axis of the control finger 20 and the first projection 22a.

According to this method, the shift ratio is calculated as y / b when the control finger 20 is pulled into the second shift lug 30b, and when the control finger 20 is pulled into the third shift lug 30c, the shift ratio is calculated as y / c.

Here, the distance a between the first projection 22a and the second projection 22b is shorter than the distance b between the second projection 22b and the second projection 22b with respect to the center axis of the control finger 20 b is shorter than the distance c to the third projection 22c, and the shift ratio is calculated to have the largest y / a.

As the calculated shift ratio is larger, the reduction amount of the gear teeth summing force is increased and the shift lever can be operated even with a relatively small force.

3, the lug grooves 32 of the plurality of shift lugs 30 have a height difference ΔW between the lug grooves 32 of the adjacent shift lug 30 and the set height ΔW, As shown in FIG.

Here, the set height? W may be designed to be larger than the height of the protrusion 22 formed on the control finger 20. [ Therefore, when the control finger 20 is rotated, the height of the lug groove 32 can be prevented from being interfered with the projection 22 formed at a higher position than the projection 22 corresponding to the height.

In the present invention, the plurality of shift lugs 30 may be formed such that the height of the lug grooves 32 is increased as the speed change stages to be implemented are provided on the lower shift rail 40.

That is, according to the present invention, the lug groove 32 provided on the shift rail 40 provided to engage with the fork coupling the lower-stage speed change gear is formed to be higher than the other lug grooves 32, ) Is designed to transmit the rotational force with a short turning radius.

Therefore, it is possible to effectively reduce the gear summing force required to engage the lower gear having a relatively large gear ratio, thereby improving the vehicle shift feeling.

For example, when it is assumed that the height of the gear stage implemented in order of the first, second, and third shift rails 40a, 40b, and 40c is increased, the first shift lug 30a relatively implements the downshift The lug grooves of the first shift lug 30a will be designed to have a height higher than the lug grooves of the other shift lugs 30b and 30c because they are provided on the first shift rail 40a.

FIG. 4 is a perspective view showing a shift operation mechanism of the manual transmission when the control finger is pulled into the low-stage side shift lug according to the present invention, and FIG. 5 is a perspective view showing the manual shift lever when the control finger is pulled into the high- And Fig.

4, the control finger 20 is moved in the select direction to enter the first shift lug 30a having a relatively high height of the lug groove, and the control shaft 10 is moved in the left- The first projection 22a pushes the first shift lug 30a and transmits the rotational force to the shift rail.

On the contrary, when the high gear is to be implemented, the control finger 20 moves in the selecting direction as shown in FIG. 5, and enters the third shift lug 30c having a relatively low lug groove height. In this state, when the control shaft 10 rotates and the third projection 22c pushes the third shift lug 30c, the shift rail is moved to perform the high-speed shift.

According to the shift operating mechanism of the manual transmission having the above-described structure, it is possible to improve the operability of the down-shifting step of the vehicle, thereby improving the vehicle commerciality.

Further, in order to improve the gear tooth force as in the prior art, it is not necessary to apply a double synchro device or a triple synchro device having a large number of friction surfaces, so that it is possible to reduce the component cost and volume while improving the gear tooth force.

While the present invention has been particularly shown and described with reference to specific embodiments thereof, 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 by the following claims It will be apparent to those of ordinary skill in the art.

10: Control shaft
12: Shift lever
14: Select finger
20: Control finger
22: projection
30: shift lug
32: lug home
40: Shift rail

Claims (7)

A control shaft rotatably connected to the shift lever;
A control finger provided on the control shaft and slidable in the axial direction according to the rotation of the select finger, and configured to rotate with the control shaft; And
And a plurality of shift lugs respectively provided on the plurality of shift rails and having lug grooves into which the control fingers are selectively inserted,
And the plurality of shift lugs are formed such that the heights of the lug grooves are different from each other. The method according to claim 1,
Wherein the lug grooves of the plurality of shift lugs are formed such that bottom surfaces thereof are formed at a horizontal height with respect to each other. The method of claim 2,
Wherein the control finger is provided with protrusions protruding on both sides at positions corresponding to the upper side of the lug grooves of the plurality of shift lugs. The method of claim 3,
Wherein the protrusions have a larger protrusion amount as the protrusions are located closer to the center axis of the control finger in the radial direction. The method of claim 4,
Wherein the plurality of shift lugs are formed to have a larger width as the height of each of the plurality of shift lugs increases. The method of claim 3,
Wherein the lug grooves of the plurality of shift lugs are formed so as to have a height difference from the lug grooves of the adjacent shift lugs by a set height. The method of claim 2,
Wherein the plurality of shift lugs are formed such that the height of the lug grooves is increased as the speed change stages to be implemented are provided on the lower shift rails.

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