JPS6331133Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

This invention relates to a detent device for a column-type shift lever in a vehicle with an automatic transmission. This invention relates to a transmission that has been improved to prevent malfunctions from occurring in the transmission due to errors caused by the transmission.

2. Description of the Related Art In particular, a column type shift lever as shown in Japanese Patent Application Laid-Open No. 57-209427 is employed as a shift lever for an automatic transmission in a truck vehicle. This column type shift lever has a rotating arm attached to the lower end of the control rod, which is rotated by manually rotating the shift lever located at the bottom of the steering wheel. It is constructed by connecting one end of the inner cable of a push-pull operation cable consisting of a cable and an outer cable. The other end of the inner cable is connected to the transmission, so that when the shift lever is rotated, the rotary arm reciprocates and the inner cable is pulled or pushed. The transmission is switched to a desired shift position. Further, such a column type shift lever is usually provided with a detent device for locking the shift lever at a rotational position corresponding to each shift position of the transmission. This day tent device was developed in the above-mentioned Japanese Patent Application Publication No. 57
As shown in Publication No. 209427, an arm is provided in the middle part of the control rod in a direction perpendicular to the axis, and the end of this arm holds a spring-biased check ball. It is constructed by being engaged in one of the number of detent grooves corresponding to the number of shift positions formed on the inner surface of a substantially cylindrical detent plate disposed so as to surround the rod. As a result, when the control rod is rotated by rotating the shift lever, the check ball at the tip of the arm sequentially engages in the detent groove. When the check ball is engaged in each detent groove, the shift operation system consisting of the shift lever, control rod, operating cable or transmission is elastically held at each shift position selected by the shift lever. The sense of moderation transmitted from the shift lever when the check ball slides into each detent groove allows the driver to feel that the transmission has been shifted to the desired shift position. On the other hand, for safety reasons, it is usually not possible to switch between the shift positions of the shift lever, which are arranged in the order of Park P, Reverse R, Neutral N, Drive D, and Low L from the top, by simply rotating the shift lever. The stroke of the shift lever is regulated to include the operation of pulling the shift lever up in the axial direction of the control rod. As a result, when switching from the P position to the L direction, when switching from the P position to the R position, and when switching from the D position to the L position, it is necessary to first pull up the shift lever in the axial direction of the control rod. It's summery. Therefore, the detent groove has a certain length in the axial direction of the control rod, and the check ball engaged in this detent groove moves inside the groove when the select lever is pulled up. to slide.

[Problems that the invention aims to solve]

By the way, the column type shift lever, which has a structure similar to the above, has a push-pull type double cable for transmitting the movement of the control rod to the transmission, so the following Such a problem exists. In other words, as shown in Fig. 5, since there is a gap between the cylindrical outer cable and the inner cable that is passed through it, the difference between pushing and pulling one end of the inner cable is There is a problem in that a deviation occurs in the behavior of the parts, which may lead to malfunction of the transmission. When a double cable is bent as shown in Figure 5,
The inner cable contacts the outer inner surface of the outer cable as shown by the solid line in the figure. In this state, when one end of the inner cable is pressed, the inner cable slides while contacting the outer inner surface of the outer cable, so the other end of the inner cable is pushed in the axial direction by an amount corresponding to the amount of push applied at one end. Displaced to. However, when pulling one end of the inner cable from this state,
The inner cable first comes into contact with the inner surface of the outer cable, as shown by phantom lines in FIG. 5, and then slides on this inner surface. Therefore, when pulling the inner cable, the initial amount of the pull is spent moving the inner cable from contacting the outer inner surface of the outer cable to contacting the inner inner surface of the outer cable. The axial displacement of the end does not correspond to the amount of pull applied to one end of the inner cable;
It will be less than that. As a result, the operating lever on the transmission side may not rotate by the required amount, and the transmission may not shift reliably. The present invention attempts to solve the above problems of the conventional example by improving the detent device.

[Means to solve the problem]

In order to solve the above conventional problems, the detent device of the present invention takes the following measures. That is, the detent groove formed on the inner surface of the detent plate is inclined in the circumferential direction of the detent plate so that the control rod rotates slightly when the shift lever is pulled up. The direction of inclination of this detent groove is such that when the shift lever is pulled up and then rotated in the direction of pulling the inner cable, as the shift lever is pulled up, the control rod pulls the inner cable due to the guiding action of the detent groove on the check ball. It is configured to rotate slightly in the direction.

[Effect]

For example, if the inner cable of the operating cable is pulled when the shift lever is rotated from the P position in the D or L direction, the detent groove should be located closer to the shift lever in the axial direction of the control rod. It is inclined toward the D or L direction. The degree of this inclination is determined by the amount of rotation of the control rod caused by the check ball being guided by the inclined detent groove when the shift lever is pulled up. It is set so that it can be pulled just enough to touch the inner surface of the cable. Therefore, after pulling up the shift lever, when attempting to rotate the shift lever in the D or L direction in the direction of pulling the inner cable, the inner cable
This means that it is in contact with the inner surface of the curved outer cable. Therefore, since the inner cable is in contact with the inner surface of the outer cable from the initial stage of traction to the final stage of traction, the amount of traction applied to one end of the inner cable and the amount of traction applied to the other end of the inner cable are affected by this. There is no error between the amount of displacement and the amount of displacement.

【effect】

From the above, the detent device for the column-type shift lever of the present invention can be used both when the inner cable of the curved push-pull type double cable is pushed and pulled in conjunction with shift lever operation. , the amount of displacement transmitted to the other end of the inner cable on the transmission side can be made equal to the amount of displacement applied to one end of the inner cable on the control rod side, and therefore, especially in the direction of pulling the inner cable. This effectively prevents malfunctions when changing the transmission by operating the shift lever. Moreover,
With this invention, it can be implemented very easily by simply tilting the conventional detent groove in the circumferential direction of the detent plate without adding any special parts to the detent plate in the detent device. It also has the advantage of causing almost no increase.

[Explanation of Examples]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a detent device for a column type shift lever in an automobile with an automatic transmission according to the present invention will be described with reference to the drawings. First, the overall structure of the column type shift lever [+] will be explained. A shift control rod 3 is rotatably supported on the left side of the steering column 2 as viewed from the driver so as to be parallel to the steering column 2. This shift control rod 3 is
The upper part 3a is connected to the lower part 3b by spline fitting, for example, so that the upper part 3a can move relative to each other in the axial direction and cannot rotate relative to each other.The upper part 3a has a two-member structure. Therefore, it is always elastically biased downward. The upper end of the upper part 3a is rotatably supported by a support bracket 4a attached to the steering column 2, and the lower end of the lower part 3a is rotatably supported by a suitable bracket 4b outside the vehicle interior after passing through a dash panel (not shown). is supported by Further, the upper part 3a is integrally provided with a shift lever 5 for the driver to grip and rotate the control rod 3, and the arm 6 attached to the lower part 3b is provided with an inner cable of the operating cable C. One end of c1 is connected. This operation cable C is a double cable consisting of a cylindrical outer cable c2 and an inner cable c1 inserted into the outer cable c2 so as to be able to move axially. It can also transmit pushing force.
A so-called push-pull type cable is used. The other end of the inner cable c1 is connected to an input arm 8 in the automatic transmission 7. Therefore, with this column type shift lever 1,
When the shift lever 5 is rotated in the direction of arrow A in FIG. 1, the arm 6 is also rotated in the same direction, and a pulling force in the direction of arrow a is applied to one end of the inner cable c1, and the input arm 8 of the automatic transmission is rotated. rotates in the direction of arrow A. On the other hand, when the shift lever 5 is rotated in the direction of arrow B in FIG. 1, the arm also rotates in the same direction, thereby causing the inner cable c1 to
A pushing force in the direction is applied, and the input arm 8 of the transmission rotates in the direction of arrow B. Now, in the column type shift lever 1, a series of operation systems consisting of the shift lever 5, the control rod 3, the inner cable c1 or the input arm 8 of the transmission is operated with a sense of moderation at a predetermined shift position. A detent device 9 for holding the shift lever 5 and a shift lever stroke regulating device 10 for preventing shifting from a predetermined shift position to another shift position without pulling up the shift lever 5 are added. However, in this example, these are specifically configured as follows. First, as shown in FIG. 2, a substantially bottomed cylindrical detent plate 11 is formed to surround the upper part 3a of the control rod 3, and the control rod 3 is inserted through the center of the bottom part 11a. However, it is fixed to an appropriate part of the steering column 2 via a bracket 12. On the inner surface of the cylindrical portion 11b of the detent plate 11, detent grooves 13a, 13b, . . . in a number corresponding to the number of shift positions are formed by press working. Each of these detent grooves 13a, 13b... has a constant length in the direction in which the control rod 3 extends, but as clearly shown in FIG. 2, they are not parallel to the control rod 3. , the detent plate is slightly inclined at an angle in the circumferential direction. Further, the cylindrical portion 11 of the detent plate 11
As shown in FIG. 3, a pipe-shaped arm 14 extending toward the detent grooves 13a and 13b formed on the inner surface of the cylindrical portion is fixedly attached to the control rod 3 inside the tube b, and a pipe-shaped arm 14 is fixedly attached at the tip thereof. A check ball 15 is embedded within the pipe-shaped arm 14 while being elastically biased outward by a compression coil spring 16 incorporated in the pipe-shaped arm 14. On the other hand, on the wall of the cylindrical portion of the detent press 11 on the side substantially opposite to the side on which the detent grooves 13a, 13b, . . . is opened, and the guide rod 1 is guided to the inner edge of this window 18.
9 projects from the opposite side of the pipe-like arm 14 of the control rod 3 to constitute the shift lever stroke regulating device 10. Next, the actions of the column type shift lever 1, daytent device 9 or stroke regulating device 10 of this example will be changed to a second mode.
This will be explained based on the drawings to FIG. In addition, the fourth
The upper figure is a diagram of each detent groove 13a, 13b, etc. seen from the inner surface of the detent plate 11.As can be clearly seen from this, each detent groove 13
a, 13b, . . . are inclined with respect to the vertical direction of the drawing, which corresponds to the direction of the control rod 3. In each figure, the detent groove 13a is in the parking P position, the detent groove 13b is in the reverse R position, and the detent groove 13b is in the reverse R position.
3c corresponds to the neutral N position, 13d corresponds to the drive D position, and 13e corresponds to the low L position. Therefore, in FIGS. 2 to 4, the check ball 15 is in the P position in the detent groove 13a.
In other words, the shift operation system is held at the P position. Now, even if the shift lever 5 is attempted to be rotated in the direction of arrow A from the state shown in the figure, the guide rod 19 will come into contact with the edge 17a' of the cam 17, so the rotation operation will not be possible. Therefore, inadvertent switching of the shift lever 5 from the P position to the R position is avoided. To switch to the R position, pull up the shift lever 5 upwards (toward the front in Figure 3) against the elasticity of a spring (not shown), align the guide rod 19 with the edge 17b of the cam 17, and move it in the direction of arrow A. Rotate it. When the check ball 15 rotates by a predetermined amount, the check ball 15 moves to the detent groove 1 corresponding to the R position.
3b and the guide rod 19 engages with the cam 17.
along edge 17b' to edge 17c. Then R
To change from position to N position, press shift lever 5.
Rotate it in the direction of arrow A. When rotated by a predetermined amount, the check ball 15 engages in the detent groove 13c corresponding to the N position, and the guide rod 19 moves from the end of the edge 17c of the cam 17 to the edge 17.
It falls along c' to edge 17d. Next, to switch from the N position to the D position, simply rotate the shift lever 5 in the direction of the arrow A, the guide rod 19 will be brought along the edge 17c of the cam 17, and when the shift lever 5 is rotated a predetermined amount, the check ball will eventually move. 15 engages in the detent groove 13d corresponding to the D position. Then, after pulling up the shift lever 5 until the guide rod 19 passes the edge 17d' of the cam 17, it becomes rotatable in the direction of the arrow A, and while the guide rod 19 is aligned with the edge 17e of the cam 17, the shift lever 5 is moved up. A
When the check ball 15 is rotated a predetermined amount in the direction
engages in the detent groove 13e corresponding to the L position. As explained previously, in this example, when the shift lever 5 is rotated in the direction of arrow A, that is, when the shift lever 5 is rotated in the direction of arrow A,
When rotated from position D to L position,
The inner cable c1 of the operation cable C is towed. and each day tent groove 1
3a, 13b..., when the shift lever 5 is pulled up, the check ball 15 moves into each detent groove 13.
Control rod 3 is guided by a, 13b...
The shift lever 5 is tilted so as to rotate slightly in the direction of arrow A, that is, in the direction in which the inner cable c1 is pulled. This results in the following effects. That is, when no external force is applied, the inner cable c1 in the curved operating cable C is normally in contact with the outer inner surface of the outer cable c2, as shown by the solid line in FIG. 5, but the detent groove 13a, 13b... is inclined in the circumferential direction of the detent plate 11 as described above, so that when the shift lever is pulled up before the shift lever 5 is rotated in the direction of arrow A, the outer side of the outer cable c2 is One end of the inner cable c1 that was in contact with the inner surface was pulled slightly, and the fifth
As shown by the imaginary line in the figure, this inner cable c1 is brought into contact with the inner surface of the curved outer cable c2. Therefore, if the shift lever 5 is then rotated in the direction of arrow A,
The entire amount of rotation is converted into a displacement of the other end of the inner cable c1 without loss, and the input arm 8 of the transmission 7 is rotated by a certain predetermined amount. In this way, the loss of displacement of the transmission side end of the inner cable due to the gap between the outer cable and the inner cable, which has conventionally been a problem when operating the shift lever in the direction of pulling the operating cable, is eliminated. The shift position can be changed reliably by pulling the inner cable without any malfunction. Note that each vertical edge 17a', 17b', 17c' of the cam 17 in the shift lever stroke regulating device
17d' may also be inclined to correspond to the inclination of the detent grooves 13a, 13b, . . . . Of course, the scope of the present invention is not limited to the embodiments described above. For example, in the illustrated example, when the shift lever 5 is rotated in the direction of arrow A, a pulling force is applied to the inner cable c1 of the operation cable, but conversely,
The present invention can also be applied to a column-type shift lever configured such that pulling force is applied to the inner cable c1 when the shift lever 5 is rotated in the direction of arrow B. In this case, the inclination direction of the detent groove is
The direction is opposite to that in the illustrated example. Further, in the illustrated example, all the detent grooves 13a, 13b, 13c... corresponding to each shift position are inclined in the same way, but when the shift lever 5 is pulled up, the check ball 15 is engaged in the detent grooves 13a, 13b, 13c... It goes without saying that the object of the present invention can be sufficiently achieved by inclining only the grooves, that is, only the detent grooves indicated by reference numerals 13a and 13d in the illustrated example, in a predetermined direction. Further, although there are various types of known shift lever stroke regulating devices other than the illustrated example, the present invention is not limited to any type of shift lever stroke regulating device.

[Brief explanation of drawings]

Fig. 1 is an external perspective view of an embodiment of the present invention, Fig. 2 is an enlarged perspective view of the main parts of the above embodiment, Fig. 3 is a sectional view taken along the - line in Fig. 2, and Fig. 4 is FIG. 5 is a diagram for explaining the properties of the push-pull operation cable. 3... Control rod, 5... Shift lever, 9... Day tent device, 11... Day tent plate, 13, 13b... Day tent groove, 1
4...Arm, 15...Check ball.

Claims (1)

[Scope of utility model registration request] A control rod to which a select lever is attached, a check ball provided with a spring bias at the tip of an arm provided at an appropriate part of this control rod, and a check ball placed so as to surround the control rod, a detent plate having a detent groove into which the check ball is sequentially engaged as the rod rotates;
In a column type shift lever of an automatic transmission in which the shift lever is pulled up during the shift lever operation stroke, the detent groove is arranged so that the control rod rotates slightly when the shift lever is pulled up. , a column-type shift lever daytent device for an automobile with an automatic transmission, characterized in that the daytent plate is inclined in the circumferential direction.