JPS6343536Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement in the structure of a change mechanism, particularly a change lever, for operating an automobile transmission in multiple stages.

(Prior art) Generally, when the operation button of the change knob attached to the upper end of the change lever is pressed, the center shaft is pushed down in conjunction with this, and the pin that is linked to the depression of the center shaft is disengaged from one position regulating groove. A change lever device for an automobile change mechanism that allows the change lever to be shifted to a required position is known (for example, Utility Model Application No. 1987-1999).
(See Publication No. 88328, Publication of Utility Model Application No. 56-27719).

By the way, as shown in Fig. 1, in a conventional change lever, an inner cable 1 made of a stranded wire cable is used as the center axis, and an outer cable 2 made of synthetic resin that guides the displacement of this inner cable 1 is used for the change lever. A structure that fits into the lever 3 is commonly used.

The center shaft of this type of double cable type has the rigidity that allows it to be inserted even after the pipe-shaped change lever 3 has been bent into the desired shape. After welding 3 to the connecting bracket 4,
I was trying to insert the center shaft.

However, in such a conventional assembly structure,
If the change lever 3 is greatly bent three-dimensionally, even if the center shaft has a certain degree of rigidity, it becomes extremely difficult to insert and insert the center shaft.
To do this, the change lever 3 may be bent into the desired shape with the center shaft inserted into the change lever 3 in advance, but in that case,
There is a problem in that the outer cable 2 may burn due to the heat generated when the change lever 3 is welded to the connection bracket 4.

Furthermore, even if the center shaft could be inserted smoothly, the outer cable 2 would be misaligned if left as it is, so it was necessary to position and fix the outer cable 2 to the change lever 3 using screws 5 or the like.

(Purpose of the invention) The present invention has been made in view of the conventional change lever structure, and is an automobile engine chain in which the center shaft can be easily inserted and the change lever can be bent without any restrictions. The purpose is to provide a change lever structure for the mechanism.

(Structure of the invention) Therefore, the present invention provides a change lever for an automobile change mechanism in which when the operation button is pressed, the center shaft is pushed down, and the pin that contacts the lower end of the center shaft is disengaged from the position regulation groove, allowing shift operation. In the device, the center shaft is made of a coiled cable, and this coiled cable is connected to a straight insert pipe having a diameter smaller than the inner diameter of the change lever, which has a slit groove formed over its entire length and has many small protrusions punched out on its outer surface. The change lever member is inserted into the change lever member as it is, and the change lever member is bent into a predetermined shape in that state.

(Effects of the invention) With this structure, the coil cable is sufficiently flexible against bending, the insert pipe can be manufactured by pressing instead of being pulled out, and the slit groove allows the change lever to be It is possible to absorb variations in the inner diameter, and since the insert pipe and the change lever member contact each other only through small protrusions, the friction area is greatly reduced, so it is necessary to ensure the finished surface roughness of the inner surface of the change lever member. In addition, it is possible to absorb variations in shape change during bending, and bending of the change lever can be performed without any restrictions with the center shaft inserted, improving workability and ease of assembly of the change lever. can be significantly improved, and also
Can be manufactured cheaply.

(Embodiments) Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2, an operation knob 13 with an operation button 12 at the upper end is attached to the bended hollow shaft-shaped change lever 11, and the lower end is welded to a connecting bracket 14. Fixed by This connection bracket 14
The change lever 11 is coupled to one end of a rotating shaft 16 rotatably supported on a mounting bracket 15 fixed to the vehicle body, and a shift lever 17 is coupled to the other end of the rotating shaft 16. has been done.

Then, as shown in FIG. 2, by grasping the operation knob 13 and operating the change lever 11 from the neutral position N to any one of 1st gear, 2nd gear, D range, R range, and P range. In response to this, the shift lever 17 operates to switch (shift) a multi-speed transmission (not shown).

A coil cable 18 serving as a central shaft is fitted into the change lever 11 together with an insert pipe 19 that guides the coil cable 18. At the upper end of this coil cable 18, an upper rod 20 that is linked to the operation button 12 of the operation knob 13 is "crimped".
A lower rod 21 is connected to the lower end with a "caulk".
A pin 24 is inserted in the lower end of the change lever 11 in the diametrical direction and is in constant contact with the lower surface of the lower rod 21 by a coil spring 23 which is prevented from coming out by a stop pin 22. Although not specifically shown, this pin 24 is formed by a guide groove provided in the axial direction at the lower end of the change lever 11.
It is guided so that it can be displaced within a predetermined range in the axial direction. As partially shown in FIG. 2, this pin 24 protrudes so as to engage with each engagement groove 26 of the position regulating member 25 fixed to the mounting bracket 15, and for example, at the neutral position N. ,
When the operating button 12 of the operating knob 13 is pressed, the upper rod 20 is depressed, and this depression is transmitted to the lower rod 21 via the coil cable 18.
The pin 24 is pushed down against the spring force of the coil spring 23 and disengaged from the engagement groove corresponding to the neutral position N, allowing the change lever 11 to be operated.

As shown in FIG. 3(), the coil cable 18 is first inserted together with the insert pipe 19 into the unbent straight change lever member 11'. The insert pipe 19 is expanded so that the upper end 19a and the lower end 19b are approximately equal to the inner diameter of the change lever 11', and
1', the diameter is set to be suitably smaller than the inner diameter of the change lever member 11', and as clearly shown in FIG. 4, a slit groove 19c is formed over the entire length. A large number of small protrusions 19d, 19d, . The insert pipe 19 can be easily manufactured not by drawing but by press forming a plate material.

Furthermore, in order to absorb play (coaxiality deviation) between the upper rod 20 and the operating knob 13, the insert pipe 19 is lowered slightly below the upper end of the change lever 11.

Then, as described above, after inserting the coil cable 18 and the insert pipe 19, the third
As shown in the figure (), the change lever member 1
1' is bent into a desired shape. By this bending process, the change lever member 11' is formed as the change lever 11, and the change lever member 11' is formed as the change lever 11.
In the curved part of , a large number of small protrusions 19d, 19d,...
is in point contact with the inner surface of the change lever 11, and the insert pipe 19 is deformed to follow the curve. However, since an appropriate gap is secured in advance between the insert pipe 19 and the change lever member 11', the bending of the insert pipe 19 will be limited to the coil cable 18 inserted inside, unless the bending process is extremely extreme. The coil cable 18 is not so extreme as to prevent displacement of the insert pipe 19, and the coil cable 18 curves smoothly following the curve of the insert pipe 19.

As mentioned above, the change lever 11, which has been bent into a desired shape, is fixed at its lower end to the connection bracket 14 by welding. in this case,
Since the coil cable 18 and the insert pipe 19 are made of metal, they will not burn due to welding heat.

After this installation, the pin 24 is inserted into the lower end side of the change lever 11, the coil spring 23 is inserted, and the stop pin 2 is inserted.
2, the assembly of the change lever 11 can be completed.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the conventional change lever structure, Fig. 2 is a side view of the change lever according to the present invention, and Figs. 3 () and () show the change lever before and after bending, respectively. FIG. 4 is an enlarged sectional view of the upper part of the lever, and is a sectional view taken in the - line direction of FIG. 3(). 11...Change lever, 11'...Change lever member, 12...Operation button, 13...Operation knob, 17...Shift lever, 18...Coil cable, 19...Insert pipe, (19c...
...slit groove, 19d, 19d, ... small protrusion),
24... Pin, 25... Position regulating member, 2
6...Engagement groove.

Claims (1)

[Scope of claim for utility model registration] When the operation button is pressed, the center shaft is pressed down,
In a change lever for an automobile change mechanism in which a pin that abuts the lower end of the center shaft comes out of a position regulation groove to enable a shift operation, the center shaft is composed of a coiled cable, and the coil cable has a slit groove formed along its entire length. and an insert pipe with a smaller diameter than the inner diameter of the change lever, which has a large number of small protrusions punched out on its outer surface, is inserted into a straight change lever member, and the change lever member is bent into a predetermined shape while being inserted. The change lever structure of a processed automobile change mechanism.