JPH0441373Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a manual control lever device for an automatic transmission.

(Prior Art) In general, a manual control lever device for an automatic transmission is rotatably supported by a transmission case, protrudes outward from the case, and extends along its outer periphery in the axial direction from the outer end to a predetermined location on the inner end. A manual valve lever shaft is provided with a width across flats portion having a predetermined length, and a fitting hole having an engagement surface that engages with the width across flats portion of the lever shaft. An operating lever such as a push lever that is fitted into the width across flats portion and rotates to operate a neutral switch, and a fitting hole having an engagement surface that engages with the width across flats portion of the lever shaft. A control lever is provided at an outer end of the lever shaft and fitted into the width across flat portion, and the lever shaft is rotated by rotating the control lever about the axis of the lever shaft as a rotation center. The control lever is configured to be rotated by the user.

(Problem to be solved by the invention) By the way, in the manual control lever device of such an automatic transmission, no problem occurs if the operating force applied to the control lever is not very large, but if the operating force is large. In this case, the following problems arise.

In other words, in the manual control lever device of such an automatic transmission, since a predetermined distance is maintained between the shaft support of the lever shaft and the control lever fitting part, the operating force applied to the control lever is large and this operation is difficult. When a force acts perpendicularly to each width across the width across flats of the lever shaft, the bending moment applied to the lever shaft is large, causing the lever shaft to deflect significantly, impairing the operability of the control lever device. become.

For example, when a vehicle equipped with such an automatic transmission is a truck with a large load and the shaft is operated from the parking position to the driving position on a steep slope, the deflection of the lever shaft becomes large due to the large shaft load. This may result in increased play in the shaft lever, impairing the shift operation wing.

(Means for Solving the Problems) The present invention has been made in order to deal with such problems, and in a manual control lever device for such an automatic transmission, the control lever is attached to each width surface of the width across flats portion of the lever shaft. A distinctive feature of the structure is that the control lever is fitted with its longitudinal direction orthogonal to the other.

(Operations and Effects of the Invention) As a result, in the present invention, the direction of the operating force applied to the control lever is approximately parallel to each width surface of the width across flats portion of the lever shaft.
The section modulus and moment of inertia of the lever shaft with respect to the operating force applied to the lever shaft are increased, and the deflection of the lever shaft can be prevented by its own rigidity. Therefore, according to the present invention, it is possible to improve the shift operation feeling in the manual control lever device.

(Embodiment) Hereinafter, an embodiment of the present invention will be described based on the drawings. FIG. 1 shows a manual control lever device for an automatic transmission for a vehicle according to the present invention.

As shown in FIGS. 1 and 2, the control lever device includes a manual valve lever shaft 11, a push lever 12, a control lever 13, and a shift operation mechanism 20 for operating the control lever 13. ing.

The lever shaft 11 is rotatably supported by a transmission case 31 of an automatic transaxle, and a case 32 houses a neutral start switch attached to one side of the case 31.
It penetrates and protrudes outward. As shown in FIG. 3, this lever shaft 11 is provided with a width across flats portion 11a having a predetermined length in the axial direction from the outer end to a predetermined portion on the inner end side on its outer periphery. A push lever 12 for actuating a neutral start switch is fitted onto the outer periphery of the case 32. This push lever 12 is provided with a fitting hole that fits into the outer periphery of the lever shaft 11, and the engagement of the engagement surface of this fitting hole with the width across flats portion 11a of the lever shaft causes the lever shaft 11 to Width across flats part 1 at the middle part of
1a so that torque can be transmitted thereto. Further, in this lever shaft 11, a control lever 13 is fitted onto the outer periphery of the outer end thereof and is prevented from coming off. Like the push lever 12, this control lever 13 has a fitting hole that fits into the outer periphery of the lever shaft 11, and the engagement surface 13a of this fitting hole and the width across flats part 1 of the lever shaft.
1a, the outer end of the lever shaft 11 is fitted to the width across flats portion 11a so that torque can be transmitted. In addition, the case 31 of the lever shaft 11
A manual valve lever (not shown) that engages with the manual valve and shifts the manual valve to each position is fitted onto the outer periphery of the inner end portion thereof so as to be capable of transmitting torque.

On the other hand, the shift operation mechanism 20 includes a shift lever 22 rotatably supported by a retainer 21 fixed to the floor of the driver's cab, and a push-pull cable that connects each rotating end of the shift lever 22 and control lever 13 to each other. 23, and by shifting the shift lever 22 to each position, the control lever 13 is rotated by a predetermined amount clockwise or counterclockwise as shown in FIG. 1 via the push-pull cable 23. As a result, the lever shaft 11 rotates in response to the shift operation of the shift lever 22, rotates the manual valve lever (not shown) and the push lever 12, and moves the manual valve (not shown) of the transmission to a desired position using the valve lever. At the same time, if the switch is in the neutral position, the neutral start switch is pushed by the push lever 12 to a state where the engine can be started.

In the present embodiment, as shown in FIG. They are fitted so that they are perpendicular to each other. This results in
Each width surface 11b, 11c of the lever shaft 11 is substantially parallel to the direction F of the operating force applied to the rotating end of the control lever 13. For this reason,
The section modulus and moment of inertia of the lever shaft 11 relative to the operating force applied to the control lever 13 are increased, and deflection of the lever shaft 11 can be prevented by its own rigidity. This prevents play in the shift lever 22 caused by deflection of the lever shaft 11, so shift operation feeling is not impaired by play in the shift lever 22, and the shift operation feeling is improved compared to the conventional system. can be done.

[Brief explanation of the drawing]

Fig. 1 is a partial side view of a vehicle automatic transmission equipped with a manual control lever device according to the present invention, Fig. 2 is a partially cutaway rear view of the same, and Fig. 3 is a partial perspective view of a lever shaft in the same device. be. Explanation of symbols, 11... Manual valve lever shaft (lever shaft), 11a... Width across flats portion, 11b, 11c... Width surface, 12... Push lever, 13... Control lever, 20... Shift operation mechanism , 22...Shift lever, 23...Push-pull cable.

Claims (1)

[Scope of utility model registration request] A manual valve that is rotatably supported by a transmission case, protrudes to the outside of the case, and has a width across flats portion on its outer periphery that has a predetermined length in the axial direction from the outer end to a predetermined portion on the inner end side. A lever shaft and a fitting hole having an engaging surface that engages with the width across flats part of the lever shaft are fitted into the width across flats part at the middle part of the lever shaft, and the lever shaft is neutralized by rotational movement. An operating lever such as a push lever for operating a switch, and a fitting hole having an engaging surface that engages with the width across flats portion of the lever shaft are provided, and the outer end of the lever shaft is fitted into the width across flats portion. A manual control for an automatic transmission, which is equipped with a control lever that is combined with the control lever, and rotates the control lever about the axis of the lever shaft, thereby rotating the lever shaft and rotating the operating lever. A manual control lever device for an automatic transmission, characterized in that the control lever is fitted with the longitudinal direction of the control lever perpendicular to each width surface of the width across flats portion of the lever shaft.