JPH0537698Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a mechanism for preventing overrun of a change lever in an automatic vehicle, and more particularly to a mechanism for preventing overrun of a change lever when operating from a parking position to a reverse position.

(Prior art and its problems) The column-type shift mechanism for automatic cars is the first
As shown in the figure, a control rod 2 is disposed along the longitudinal direction of the steering column 1 on the outer side of the steering column 1 and is pivotally supported to be slidable and rotatable in the axial direction. a change lever 3 provided at the upper end of the control rod 2 for operating the control rod 2; an arm 4 fixedly provided at the lower end of the control rod 2;
and a control lever 5 in the transmission (not shown), a detent mechanism 7 for correctly positioning the operating position of the change lever 3, and the like. A detent mechanism 8 is provided.

As shown in FIG. 2, the detent mechanism 7 includes a locking pin 10 with one end fixed to the lower end of the control rod 2, and one end fixed to the side wall of the steering column 1 to position the tip of the pin 10. Detent plate 11 in which a cam groove 11a is formed
It is composed of. In addition, the day tent mechanism 8
1, a detent plate 13 is fixed to the rotation shaft 12 of the control lever 5.
and a roller 15 whose one end is rotatably supported by the other end of a leaf spring 14 fixedly installed in the housing of the transmission, and which is fittable into each positioning groove of the detent plate 13. .

The daytent mechanism 8 has a daytent plate 13 between the parking position P and the reverse position R for security reasons.
The shape of the groove 13a at the parking position P is different from the shapes between the other neutral position N, drive position D, etc., and the groove 13a at the parking position P is formed deeply.
When switching from the reverse position R to the reverse position R, the peak 13b
The setting is such that the operating force required to overcome this is heavy. On the other hand, as shown in FIG. 3, the detent plate 11 of the detent mechanism 7 on the indoor side is designed to prevent the pin 10 from overrunning by a mountain portion 11b when operating from the reverse position R side to the parking position P. There is, but parking position P
When operating from the reverse position R side, the mountain part 1
After exceeding 1b, overrun prevention is not performed.

When the operating force between the parking position P and the reverse position R is heavy due to the detent mechanism 8, as is clear from the shape of the cam groove 11a of the detent plate 11 shown in FIG. When the change lever 3 is operated, the pin 10 is locked by the crest 11b to prevent overrun. However, when operating from the parking position P to the reverse position R, after the pin 10 passes over the peak 11b as shown by arrow A, there is no stopper for locking the pin 10. If the operating force is large, even if you stop the pin 10 at position B and operate it in the direction of arrow A', and then try to operate it to reverse position R, there is a risk that it will not stop at position B and will overrun in the direction shown by arrow C. . Particularly in the case of a column type, the operability of the change lever 3 is poor, so the greater the operating force, the more likely the overrun occurs. Moreover, the operating force of the detent mechanism 8 in the transmission cannot be lowered for safety reasons.

In order to prevent such an overrun, there is a method of increasing the lever ratio to reduce the overall operating force, but increasing the lever ratio increases the lever stroke, which poses a problem in that it is difficult to configure in terms of layout.

The present invention has been developed in view of the above-mentioned points, and is a change lever overrun prevention mechanism for automatic vehicles that prevents the change lever from overrunning when operating the indoor day tent mechanism from the parking position to the reverse position R. The purpose is to provide

(Means for Solving the Problems) In order to achieve the above object, according to the present invention, between a control rod connected to a shift change lever and a day tent mechanism for positioning the control rod, The control rod is activated in response to the operation of the shift change lever from the parking position to the reverse position, and the control rod is locked at a predetermined position in the middle of the movement path, and the control rod is moved from the locking position to the reverse position. The locking mechanism is provided with a locking mechanism that allows movement of the control rod in the direction, and the locking mechanism is provided with an engaging portion installed on the control rod and a locking mechanism installed on the detent mechanism. The guide groove is formed to be engageable and to restrict movement to a direction other than the movement path, and the guide groove is formed to become shallower toward the reverse position.

(Function) The control rod operates in response to the shift change lever being moved from the parking position to the reverse position, and is locked by the guide groove at a predetermined position in the middle of its movement path. The guide groove is formed to become shallower in the direction of the reverse position, and the control rod is allowed to move from the locked position towards the reverse position. As a result, when the shift change lever is operated from the parking position toward the reverse position, it is prevented from overrunning beyond the reverse position toward another position.

(Example) An example of the present invention will be described below in detail based on the accompanying drawings.

Fig. 4 shows a column type shift mechanism to which the present invention is applied, in which the control rod 2 is pipe-shaped and its upper and lower ends are connected to shafts 30, 31 by arrows G,
It is indicated by G′ and can be slid upward and downward, and arrow H,
The shafts 30, 31 are rotatably supported as indicated by H', and are fixed to the side wall of the steering column 1 shown in FIG. A shift change lever (hereinafter simply referred to as "change lever") 3 is attached to the upper end of the control rod 2.
An arm 4 is fixed to the lower end, and a detent mechanism 7' is provided at a predetermined position above the arm 4. This arm 4 is connected to a control lever 5 in the transmission via a cable 6, as shown in FIG.

The detent mechanism 7 includes a locking pin 10 whose one end is fixed to the side wall of the control rod 2, a pipe-shaped holder 20 arranged in parallel with the pin 10 at a predetermined position above the pin 10, and these. pin 10,
It is composed of a detent plate 25 and the like arranged opposite to the holder 20. As shown in FIGS. 4 and 5, a locking ball 21 is housed in the open end of the holder 20 so as to be movable in and out via a spring 22.

A cam groove 25b is formed on one side of the plate surface 25a of the detent plate 25, and the roller 10a at the tip of the pin 10 is slidably fitted into the cam groove 25b. One end 25c of the detent plate 25 is fixed to the side wall of the steering column 1 (FIG. 1). A locking hole 25e is bored on the other side of the plate surface 25a of the detent plate 25. This hole 25e corresponds to the reverse position R of the cam groove 25b, and when the control rod 2 is moved upward to the upper limit position, the pin 10 is placed in the center of the passage 25h between the peak 25d of the cam groove 25b and the opposite end surface. It is set at a position corresponding to the ball 21 housed in the holder 20 in the positioned state.

As shown in FIG. 6, two guide grooves 25f and 25g are formed at the open end of the hole 25e on the plate surface 25a side, and the guide groove 25f gradually becomes shallower from the hole 25e toward the parking position P shown by arrow F'. The guide groove 25g is formed in a substantially triangular shape that gradually becomes shallower and tapered in a substantially triangular shape from the hole 25e toward the reverse position R indicated by the arrow G'. The diameter of the hole 25e is set to be smaller than the diameter of the ball 21 housed in the holder 20, so that a portion of the ball 21 falls into it. Control rod 2 holder 20, ball 21, spring 22 and detent plate 2
A moderation mechanism 26 is formed between the control rod 2 and the detent plate 25 by the hole 25e. Ball 21 is control rod 2
When the roller 10a at the tip of the locking pin is engaged with the cam groove 25b of the detent plate 25, it is pressed against the plate surface 25a of the detent plate 25 by the spring force of the spring 22 with a predetermined pressing force.

The action will be explained below.

When the change lever 3 is in the parking position, the roller 1 of the pin 10 is
0a is located in the parking position P of the cam groove 25b of the detent plate 25, and the ball 21 is located in the cam groove 25b of the plate surface 25a of the detent plate 25.
It is pressed to a position near the.

Next, when operating the change lever 3 from the parking position to the reverse position, when the change lever 3 is pulled toward the front as shown by arrow E in FIG. 4, the control rod 2 moves upward as shown by arrow G. As the control rod 2 moves upward, the roller 10a and ball 21 of the pin 10 move and roll in the direction shown by arrow G in FIG. 7b.
At the upward movement stop position of the control rod 2, the roller 10a of the pin 10 faces the center of the cam groove 25h, and the ball 21 faces the guide groove 25f and the hole 25e.
I'm going to meet you. When the change lever 3 is pulled toward the front and rotated toward the reverse position R shown by the arrow H in FIG. 4, the roller 10a of the pin 10 moves into the cam groove 2
5b passing through the center of passage 25h in the direction of arrow F,
The ball 21 rolls on the plate surface 25a and moves into the guide groove 25.
It reaches within f. When the change lever 3 reaches the reverse position, the ball 21 falls from the guide groove 25f into the hole 25e as shown in FIG.
e, the change lever 3 is locked in the reverse position, and overrun toward the neutral position is prevented. At this locking position, pin 1
The zero roller 10a faces the reverse position R of the cam groove 25b.

Next, when the change lever 3 is returned in the direction of arrow E' in FIG.
0a is the reverse position R shown by arrow G' in Fig. 7d.
The ball 21 rolls against the spring force of the spring 22 from the hole 25d, through the guide groove 25g, and toward the cam groove 25b of the plate surface 25a. When the control rod 2 is at the downward movement stop position, the roller 10a of the pin 10 is at the reverse position R of the cam groove 25b as shown in FIG. 7d, and the ball 21 is located near the cam groove 25b of the plate surface 25a.

Since the guide groove 25g is formed to become gradually shallower toward the reverse position shown by arrow G' in FIG. 6, escape from the hole 25e toward the reverse position R becomes easy. However, it is not easy to escape from the hole 25e toward the neutral position N indicated by the arrow F in the figure, and even if a large operating force is applied to the change lever 3, it is not easy to escape. In this way, when the change lever 3 is operated from the parking position to the reverse position, overrun of the change lever 3 toward the neutral position is prevented.

From the reverse position of change lever 3 to Fig. 7d
When the ball 21 is operated in the direction of the neutral position indicated by the arrow F, the ball 21 rolls on the plate surface 25a of the detent plate 25, so the resistance becomes extremely small and the operation becomes easy.

When operating the change lever 3 from the reverse position to the parking position, the change lever 3
is pulled in the direction of arrow E in FIG. 4 to move control rod 2 upward in the direction shown by arrow G. As the control rod 2 moves upward, the ball 21 enters the guide groove 25g, and the control rod 2
falls into the hole 25e at the upper movement stop position.
Next, with the change lever 3 pulled as described above, the fourth
When rotated in the direction shown by arrow H' in the figure, the ball 21 passes from the hole 25e through the guide groove 25f to the plate surface 2.
5a, the roller 10a of the pin 10 passes through the passage 25h of the cam groove 25b and passes over the peak 25d. As shown in FIG. 6, the guide groove 25f is formed to become gradually shallower from the hole 25e toward the parking position indicated by the arrow F', making it easy to escape from the hole 25e toward the parking position, making it easier to operate the change lever 3. Only a small amount of force is required.

When the change lever 3 reaches the parking position, the change lever 3 is operated in the direction of arrow E' shown in FIG. 4 to move the control rod 2 down to its lower end position in the direction shown by arrow G'. Accordingly, the roller 10a of the pin 10 moves to the parking position P of the cam groove 25b as shown in FIG. 7a, and the ball 21 moves and rolls near the cam groove 25b.

FIG. 8 shows another embodiment of the present invention, in which a passage 2 communicating the parking position P side and the reverse position R side of the cam groove 25'b of the detent plate 25'.
5'h is set to be slightly larger than the diameter of the roller 10a of the pin 10, and a stepped portion 25'n is formed at a position facing the reverse position R of one end surface 25'm of the cam groove 25'b. It was formed.

When the change lever 3 is operated from the parking position to the reverse position, the roller 10a of the pin 10 moves into the one end surface 2 of the cam groove 25'b as shown in FIG. 8b.
5'm, and passes through the passage 25'h, separated by a peak 25'd and a slight gap d. When the roller 10a reaches a position opposite to the reverse position R, it hits the step 25'n and is locked at that position, and movement toward the neutral position N is prohibited. That is, overrun of the change lever 3 is prevented. When the change lever 3 is operated in the direction shown by arrow E' in FIG. is positioned at reverse position R.

The movement of the roller 10a of the pin 10 from the reverse position toward the neutral position or from the low position L toward the parking position P is unrestricted and the change lever 3 can be operated without any inconvenience.

(Effect of the invention) As explained above, according to the invention, the parking position of the shift change lever is located between the control rod connected to the shift change lever and the day tent mechanism for positioning the control rod. The control rod is activated in response to an operation from the locking position toward the reverse position, and the control rod is locked at a predetermined position in the middle of the movement path of the control rod, and the control rod is moved from the locking position toward the reverse position. In the device provided with a locking mechanism that allows movement, the locking mechanism is provided in the detent mechanism so that the locking mechanism can engage with an engaging portion installed in the control rod, and the engaging portion can engage with the engaging portion installed in the control rod. and a guide groove formed to restrict movement to a direction other than the movement path, and the guide groove is formed to become shallower toward the reverse position.
Movement of the control rod beyond the reverse position, ie, overrun of the change lever, can be prevented. Furthermore, since the locking mechanism is provided between the detent mechanism and the control rod, there are no problems with the layout, and the locking mechanism can be constructed at low cost.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram of a column type shift mechanism of an automatic vehicle, Fig. 2 is a perspective view of a conventional day tent mechanism used in the column type shift mechanism of Fig. 1,
Fig. 3 is a plan view of the detent plate of the detent mechanism shown in Fig. 2, Fig. 4 is a partially cutaway side view of a column type shift mechanism equipped with a change lever overrun prevention mechanism according to the present invention, and Fig. 5. is a partially cutaway assembled perspective view of the detent mechanism shown in FIG. 4, FIG. 6 is an enlarged perspective view of the hole shown in FIG. 5, and FIG. 7 is a diagram showing the operation of the detent mechanism and moderation mechanism shown in FIG. 5.
FIG. 8 is a plan view of a detent plate to which another embodiment of the moderation mechanism according to the present invention is applied. DESCRIPTION OF SYMBOLS 1... Steering column, 2... Control rod, 3... Change lever, 7'... Day tent mechanism, 10... Locking pin, 20... Holder, 21... Ball, 22... Spring, 2
5, 25'... Detent plate, 26... Locking mechanism.

Claims (1)

[Claims for Utility Model Registration] A system is provided between a control rod connected to the shift change lever and a detent mechanism for positioning the control rod, for operation of the shift change lever from the parking position to the reverse position. A locking mechanism is provided that locks the control rod at a predetermined position in the middle of the movement path of the correspondingly activated control rod and allows movement of the control rod from the locking position in the direction of the reverse position. In the device, the locking mechanism is capable of engaging with an engaging portion installed on the control rod and the engaging portion provided on the detent mechanism, and restricts movement to a direction other than the movement path. 1. An overrun prevention mechanism for a change lever of an automatic vehicle, characterized in that the guide groove is formed to become shallower toward the reverse position.