JPH0346279Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] The present invention relates to a gear shift operation device for an automatic transmission of a vehicle.

In this type of automatic transmission shift operation device, as shown in Utility Model Application Publication No. 55-170130, for example, when the shift lever is tilted to the P, R, D, 2, and L positions, the desired driving mode is selected. It is becoming more and more common.
That is, as shown in FIG. 2, a knob 9 is fitted and fixed to the upper end of the hollow shift lever 10, and a sliding body 8 having a cam surface 3 is fixedly supported on this cylindrical portion 7. The knob 9 has a cylindrical portion 5 that crosses the cylindrical portion 7.
A push button 2 having a notch 4 is fitted into the push button 2, and a spring 6 is interposed between the push button 2 and the end wall of the cylindrical portion 5. A guide member 13 that is slidable along the shift lever 10 is coupled to the lower end of the operating rod 12, and a spring 16 interposed between the guide member 13 and the lower end of the shift lever 10 12 and the sliding body 8 is pushed up and engaged with the notch 4 of the push button 2. A control pin 14 is fixedly supported on the guide member 13, and this control pin 4 is connected to the shift lever 1.
It protrudes outward from a slit 14 provided at 0.

A support member 17 is connected to the lower end of the shift lever 10 by welding or the like, and a shaft hole 17 provided therein is connected to the support member 17 by welding or the like.
The shift lever 10 is supported by a vehicle body (not shown) by a support shaft passing through a, and the shift lever 10 is tilted in the longitudinal direction of the vehicle about this support shaft.
Then, when the push button 2 is pushed in against the force of the spring 6, the operating rod 12 is pushed down, and at the same time the control pin 14 moves downward along the slit 15, and the control opening edge of the control plate (not shown) is moved downward. Shift lever 1 is disengaged from the
0 can be tilted.

However, as shown in Japanese Patent Application No. 59-58622, for example, an interlock mechanism is provided on the shift lever and steering wheel to prevent the vehicle from moving due to careless operation of the shift lever while parked. In the case of a shift operating device for an automatic transmission, if an attempt is made to forcefully operate the operating rod even though the interlock mechanism is in a locked state, an excessive force is applied to the control pin, which may break. Since the force acting on the control pin during normal operation is extremely small, it is possible to use synthetic resin with relatively good slippage in order to improve operability.
In order to prevent this danger, the diameter of the control pin is increased and cast steel is used as the material.
The processing takes time and increases costs.

In view of the above-mentioned problems, the purpose of the present invention is to provide an automatic device that avoids the force of the operating rod from being transmitted to the control pin and prevents damage to the control pin when an unreasonable external force is applied to the operating rod. An object of the present invention is to provide a gear shift operation device for a transmission.

In order to achieve the above object, the present invention provides a control that is supported within a hollow shift lever so as to be axially movable, and that protrudes laterally from a slit in the shift lever and engages with an opening edge of a control plate. The operating rod that supports the pin is divided into two parts, and the two parts are connected to each other so as to be separated at a predetermined interval by a spring interposed between the two parts.

The present invention will be explained based on examples. As shown in FIG. 1, the shift operating device for an automatic transmission according to the present invention includes an operating rod 12 supported in an axially slidable manner inside a shift lever 10, and an upper divided body 12a.
and a lower divided body 12b, which are expandably and contractibly connected by a connecting means 30. In the illustrated example, this connecting means 30 connects the flange 21 to the lower end of the divided body 12a, and
A cylindrical body 22 is connected to the upper end of b, and this cylindrical body 22
The flange 21 is slidably inserted into the inside of the
In addition, the opening edge 22b of the cylindrical body 22 is bent toward the center so that the flange 21 does not come off the cylindrical body 22. A spring 23 is interposed between the flange 21 and the bottom 22a of the cylindrical body 22.

The other configurations are the same as those of the conventional example shown in FIG. 2, and similar constituent members are given the same reference numerals and explanations will be omitted.

Next, the operation of the shift operating device for an automatic transmission according to the present invention will be explained. In normal gear shifting operation, when the push button 2 is pushed into the cylindrical part 5, the sliding body 8
At the same time, the operating rod 12 is pushed down, and this operating force is transferred from the divided body 12a to the divided body 1 via the spring 23.
2b, the control pin 14 is lowered along the slot 15, and the shift lever 10 can be tilted into the desired operating mode.

When the control pin 14 is restrained, for example, when the vertical movement of the control pin 14 is prevented by an interlock mechanism with the steering wheel, when the push button 2 is pushed into the cylindrical part 5, the sliding body 8
At the same time, the divided body 12a of the operating rod is pushed down, but at this time, the spring 23 is only bent, and the divided body 12a is pushed down.
b does not move. In this way, the excessive external force acting on the control pin 14 is alleviated and does not cause any trouble to the interlock mechanism.

[Effects of the invention] As described above, the present invention provides a control that is supported within a hollow shift lever so as to be movable in the axial direction, and that protrudes laterally from the slit of the shift lever and engages with the opening edge of the control plate. The operating rod that supports the pin is divided into two parts, and the two parts are connected at a predetermined distance by a spring inserted between the two parts, so that if an excessive load is applied to the operating rod through the push button, The spring flexes, avoiding excessive load on the control pin and preventing accidents such as breakage of the control pin.

Since excessive loads on the control pins can be avoided, the control pins only need to have the strength required for normal gear shifting operations, and control pins made of synthetic resin or other materials with excellent slipperiness for ease of operation are used. Furthermore, even if an interlock mechanism between the shift lever and the steering wheel is installed, there is no need to change the dimensions or material of the conventional control pin.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view of a shift operating device for an automatic transmission according to the present invention, and FIG. 2 is a front sectional view of a conventional shift operating device for an automatic transmission. 2: Push button, 3: Camshaft, 8: Sliding body, 9: Knob, 10: Shift lever, 12: Operation rod, 12a, 12b: Split body, 14: Control pin, 15: Slit, 23: Spring, 30: Connection means.

Claims (1)

[Scope of utility model registration request] an operating rod that is supported in an axially movable manner inside a hollow shift lever and that supports a control pin that protrudes laterally from a slit of the shift lever and engages with an opening edge of a control plate; 1. A speed change operation device for an automatic transmission, characterized in that two divided bodies are connected to each other so as to be separated at a predetermined interval by a spring interposed between the divided bodies.