JPH035713Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a control device for shifting to each range of an automatic transmission.

[Conventional technology]

As a conventional control device for an automatic transmission, there is one described, for example, in Japanese Patent Application Laid-open No. 141931/1983. That is, in this conventional example, the operating lever is oscillated by a control rod that is moved by the shift lever, and this oscillation is converted into the oscillation of the bell crank lever via the connecting rod. It is of the type that allows the push/pull cable connected to the end to move forward and backward. The other end of the push-pull cable is connected to an automatic transmission, and is configured to shift to a predetermined range by advancing or retracting the transmission.

[Problem that the invention attempts to solve]

However, according to such conventional technology, there are two swinging members, the connecting rod and the bell crank lever, in the power transmission path between the shift lever and the push/pull cable. The problem is that the device has a complicated structure and occupies a large amount of space. In addition, connecting parts of members that move relative to each other are provided between the control rod and the connecting rod, between the connecting rod and the bell crank lever, at the fulcrum of the bell crank lever, and between the bell crank lever and the pusher. There is also the problem that since there are many such as between the pull cable and the pull cable, play in the power transmission path becomes large and operation feeling is not favorable.

The present invention was developed by focusing on the problems of the conventional technology, and it simplifies the structure of the power transmission path between the shift lever and the push/pull cable, saves space, and eliminates backlash. The purpose is to reduce the amount of noise and improve the operational feeling.

[Means for solving problems]

The control device of the present invention consists of a shift lever facing the driver's seat, a cylindrical cam rotated by the shift lever, a spiral portion such as a cam groove formed on the circumferential surface of the cylindrical cam, and a spiral portion that engages with the spiral portion. an engaging body that moves forward and backward by the rotation of a cylindrical cam; one end is connected to the engaging body and the other end is connected to the automatic transmission side, and the movement of the engaging body is transmitted to the automatic transmission by moving forward and backward. Consists of a push/pull cable.

[Effect]

When the driver rotates the shift lever, the cylindrical cam rotates together with the shift lever. Then, the engaging body that engages with the helical part of the cylindrical cam moves in the axial direction of the cylindrical cam, pushes or pulls one end of the push-pull cable in the same direction, and the automatic puller connected to the other end of the push-pull cable moves in the axial direction of the cylindrical cam. Shift the transmission.

〔Example〕

1 and 2 are diagrams showing a first embodiment of the present invention. 1 is the steering column, which is
It consists of a steering shaft 1a that has a steering wheel (not shown) fixed to its upper end and transmits its rotation to a steering gear (not shown), and a column tube 1b that is located on the outer periphery of the steering shaft 1a and is fixed to the vehicle body.

A relatively short control rod 3, which is generally parallel to the column tube 1b, is rotatably supported by a bracket 2 fixed to the outer periphery of the column tube 1b. A shift lever 4 facing the driver's seat is swingably fixed to the control rod 3 by a pin (not shown), so that when the shift lever 4 rotates, the control rod 3 rotates as a unit. At the same time, the tip of the shift lever fits into the position setting hole 2a provided in the bracket 2 (see Fig. 5), and by the action of the spring 2b attached to the shift lever 4, the tip of the shift lever and the position setting hole 2a are connected. is engaged to prevent erroneous operation of the shift lever, as is well known.

Further, a bracket 5 is fixed to the outer surface of the column tube 1b, and a cylindrical cam 6 is rotatably supported inside the bracket 5. The cylindrical cam 6 is coaxial with the control rod 3.
are connected so that they rotate together. Cylindrical cam 6
A spiral cam groove 7 is formed on the outer periphery of the cam groove 7 . This cam groove 7 forms the spiral body of the present invention.

The tip of the engaging body 8 engages with the cam groove 7 of the cylindrical cam 6. The engaging body 8 passes through the elongated hole 5a of the bracket 5, and is supported by the bracket 5 such that its tip always engages with the cam groove 7, and the elongated hole 5a of the bracket 5 is connected to the axis of the cylindrical cam 6. They extend in the same direction, and as the cylindrical cam 6 rotates, the engaging body 8 moves forward and backward along the elongated hole 5a.

One end of a push-pull cable 9 is fixed to the engaging body 8. The other end of the push-pull cable 9 is connected to a control lever (not shown) for shifting the range of the automatic transmission. 10 is
This is the outer cable of the push/pull cable 9, and one end thereof is fixed to the bracket 11 of the column tube 1b.

In FIG. 2, 12 is a pin that fixes the shaft 6a of the cylindrical cam 6 and the control rod 3;
is a key 14 for fixing the cylindrical cam 6 and the shaft 6a;
is ugly.

When the driver rotates the shift lever 4, the cylindrical cam 6 also rotates via the control rod 3. Therefore, the engaging body 8 moves forward or backward along the elongated hole 5a of the bracket 5, pushes or pulls the push-pull cable 9, and shifts the automatic transmission at the other end of the push-pull cable 9 to a predetermined range.

Thus, the shift lever 4, control rod 3, and cylindrical cam 6 rotate integrally, and the engaging body 8 and push/pull cable 9 move integrally, with the cylindrical cam being the only member that moves relative to the other. 6 and the engaging body 8 only.

Further, although the cam groove 7 is formed in this embodiment as the spiral body of the present invention, it is also possible to form a convex spiral. In this case, the cross section of the convex spiral and the tip of the engaging body 8 are configured so that they can move relative to each other while always being engaged with each other.

FIG. 3 shows a second embodiment of the present invention, in which a tip 8a of an engaging body 8 is connected to a cam groove 7 by a spring 15.
, and has recesses 7a, 7 at the bottom of the cam groove 7.
b... is formed to provide moderation when the engaging body 8 moves along the cam groove 7. Recesses 7a, 7b
... is the engaging body 8 corresponding to each range of the automatic transmission.
A predetermined sense of moderation is transmitted to the driver via the shift lever 4 when the engaging body 8 passes through this and when the engaging body 8 stops at this position. . The other configurations and operations are the same as those of the first embodiment.

FIG. 4 shows a third embodiment of the present invention, in which a retainer 16 fixed to the column tube 1b is shown.
A check member 18 biased toward the cylindrical cam 6 by a spring 17 is held inside the cylindrical cam 6, and the tip of the check member 18 is engaged with recesses 6a, 6b, . . . Match. The recesses 6a, 6b, . When the vehicle stops, a predetermined sense of moderation is transmitted to the driver via the shift lever 4. This sense of moderation is the same as in the second embodiment. The other configurations and operations are the same as those of the first embodiment.

In each of these embodiments, the control rod 3 and the shift lever 4 are arranged coaxially and rotate at the same position;
It requires less space.

In each of these embodiments, the control rod 3 and the cylindrical cam 6 are positioned generally parallel to the column tube 1b, but the shift lever 4 may be located in a position facing the driver's seat for easy operation. As a result, it goes without saying that the control rod 3 and the cylindrical cam 6 may be installed at other positions depending on the position of the shift lever 4.

[Effect of idea]

As explained above, according to the present invention, the operating force transmission path between the shift lever and the push/pull cable is connected to the cylindrical cam that is rotated by the shift lever and the engaging body that engages with the cylindrical cam. With this structure, the cylindrical cam rotates at the same position, which has the effect of requiring less space. In addition, since the only connecting part of the members that move relative to each other is between the helical part of the cylindrical cam and the engaging body, there is less play in the transmission path of the operating force, and the automatic transmission can be controlled with a good feeling. It also has the effect of Furthermore, since the engaging body only moves linearly in the axial direction of the cylindrical cam, there is no need to configure the connecting part between the engaging body and the push/pull cable to be able to swing relative to each other, and the structure can be simplified. Not only can it be simplified, but it also has the effect of suppressing the play between the two.

[Brief explanation of the drawing]

Fig. 1 is a side view of the first embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main part of Fig. 1, Fig. 3 is a side view of the main part of the second embodiment, and Fig. 4 is a third embodiment. FIG. 5, which is a sectional view of the main part of the example, is a side view showing the structure of the shift lever attachment part. DESCRIPTION OF SYMBOLS 1... Steering column, 1b... Column tube, 3... Control rod, 4... Shift lever, 6... Cylindrical cam, 6a, 6b... Recessed part, 7... Cam groove, 7a, 7b... Recessed part , 8...
Engaging body, 8a... Tip of engagement body, 9... Push/pull cable, 15, 17... Spring, 18...
...Check parts.

Claims (1)

[Scope of claim for utility model registration] (1) A shift lever facing the driver's seat, a cylindrical cam rotated by the shift lever, a spiral portion such as a cam groove formed on the circumferential surface of the cylindrical cam, and a spiral a push-pull cable that has one end connected to the engaging body and the other end connected to the automatic transmission to transmit the movement of the engaging body to the automatic transmission; An automatic transmission control device comprising: (2) The helical portion of the cylindrical cam is formed by a cam groove, and the tip of the engaging body is engaged with the cam groove by urging the engaging body to come into pressure contact with the bottom of the cam groove. Utility model registration claim 1, wherein a recess is formed in the bottom at the position of the engaging body corresponding to each range of the automatic transmission, and the tip of the engaging body is configured to engage with the recess when shifting to each range. Control device for the automatic transmission described. (3) A check member is elastically pressed against a surface other than the spiral portion of the circumferential surface of the cylindrical cam, and a recess is formed at a position of the check member corresponding to each range of the automatic transmission on the surface of the cylindrical cam. The control device for an automatic transmission according to claim 1, wherein the tip of the check member engages with the recess when shifting to each range.