JPS6225781Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a select stop device in a vehicle transmission, particularly a horizontal front-wheel drive type transmission.

Conventionally, there has been a shift member that integrally operates in the shift or select direction as the shift and select lever shaft is operated, and a shift member that receives one end of a spring that applies a select return force to this member and that comes into contact with the shift member. The spring seats that regulate the select position are both made of metal, and the select stopper function is achieved by the metals coming into contact with each other. Therefore, each time a selection operation is performed, there is a possibility that a metal tapping sound and accompanying vibration (impact shock) may be caused.

The purpose of this invention is to provide a select stopper device that can prevent inconveniences such as metal tapping sounds during select operations and accompanying vibrations through simple improvements.

The configuration of this invention will be described below with reference to embodiments shown in the drawings.

In FIGS. 1 and 2, which are partial cross-sectional views of a horizontally mounted FF type transmission, a single shift and select lever shaft 2 is installed in the transmission case 1.
It is assembled so that it can be rotated around its axis (shift operation) and slid in the axial direction (select operation). A first shifting lever 3, a second shifting lever 4, and an interlock plate 5 are mounted on the shaft of the shaft 2 located inside the case 1, respectively. That is, both the shifting levers 3 and 4 are fitted in a serration to the outer periphery of the shaft 2, and are attached by slotted pins 28 and 29 so that they can operate integrally with the shaft 2 in both the shift and select operating directions. . Further, the interlock plate 5 moves together with the shaft 2 in the select operation direction, and moves relative to the shaft 2 in the shift direction. A groove 6 extending long only in the selection direction is formed on the upper surface of the interlock plate 5, and the end of a holder 13 attached to the case 1 is engaged with this groove. With this structure, the interlock plate 5 is positioned on the case 1 side through the holder 13 in the shift direction, and can move together with the shaft 2 and both shifting levers 3, 4 in the select direction. On the other hand, as is clear from FIG. 2, the upper surface of the first shifting lever 3 has detent grooves 3 corresponding to both positions in the shift direction and the neutral position thereof.
a, and one of these is engaged with a detent ball 14 housed inside the tip of the holder 13.

When the shaft 2 is slid in the axial direction by the select operation, both the shifting levers 3, 4 and the interlock plate 5 are moved.
both move in the axial direction. As a result, when the first shifting lever 3 engages one shift head of each shift fork (not shown), both claw portions 5a of the interlock plate 5 engage with the other shift heads. Further, the second shifting lever 4 engages with the fork shaft head of the shift fork that is engaged with the first shifting lever 3, but its detailed function is not so important here, so a detailed explanation will be omitted. .

After the selection operation, when the shaft 2 is rotated by a shift operation, both the shifting levers 3 and 4 rotate together to operate the selected shift fork and its fork shaft in a predetermined shift direction. Let it happen. At this time, the other shift forks are held at the neutral position by the interlock plate 5 mentioned above.

Now, spring seats 7 and 8 are disposed on the axis of the shaft 2 on both sides of the shift member including the above-mentioned shifting levers 3 and 4 and the interlock plate 5 so as to be slidable with respect to the shaft 2. ing. A select return spring 9 using a coil spring is interposed between the second shifting lever 4 and the spring seat 7 facing the second shifting lever 4. Another select return spring 10 is interposed between the select return spring 8 and the select return spring 8. Further, both spring seats 7 and 8 are connected to snap springs 11 and 8 fixed to the outer periphery of the shaft 2, respectively.
12, positioning with respect to the shaft 2 is performed.

The above-mentioned spring seats 7 and 8 each also serve as a component of the select stopper device, so this structure is shown as an enlarged example of the select stopper device located on the left side of Fig. 1. This will be explained with reference to FIG. First, the end surface of the second shifting lever 4 and the opposing end surface of the sleeve portion of the spring seat 7 form select stop portions 15 and 16 that face each other with a predetermined stroke. These stopper parts 1
For example, the stopper portion 16 on the side of the spring seat 7 may include a select damper 20 made of a vibration-proofing material with appropriate hardness.
is fixed. The end face of this damper 20 and the second
Select stop part 1 on the shifting lever 4 side
5 is made to match the selection amount when the shaft 2 and the shift member are operated to the left in FIG. 3 from their neutral positions. It is important to select a material for the damper 20 that has excellent oil resistance, wear resistance, heat resistance, and the like.

In the above configuration, when the shaft 2 is selectively operated in the left direction in FIGS. 1 and 3 together with the shift members including both the shifting levers 3 and 4 and the interlock plate 5, the select return spring 9 is compressed. Accordingly, the above dimension L is reduced while maintaining the select return force. Finally, the stopper portion 15 on the second shifting lever 4 side hits the select damper 20, and the select position is regulated. The impact and impact sound at this time are caused by the select damper 20.
It is possible to prevent abnormal noise and vibration from occurring when the select stopper is activated.

It goes without saying that the same effect can be obtained by attaching the above-described select damper 20 to the stopper portion 15 on the second shifting lever 4 side.
The select stopper device on the right side of FIG. 1 also has a similar damper function.

As described above, this invention can perform the select stopper function by using the select damper made of vibration-proofing material during the select operation of the transmission. Unlike this, it is possible to prevent problems such as impact noise and associated vibrations.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is a sectional view showing a part of a horizontally mounted FF type transmission, Fig. 2 is a sectional view taken along the line - - in Fig. FIG. 1...Transmission case, 2...Shift and select lever shaft, 3, 4...Shifting lever, 7, 8...Spring seat, 9, 10...
...Select return spring, 15, 16...
Select stopper section, 20...Select damper.

Claims (1)

[Scope of utility model registration request] A shift member that performs shift and select operations by rotating a shift and select lever shaft relative to a transmission case around its axis and sliding it in the axial direction, and that operates integrally with the shaft during these operations. In a transmission of a type in which a select return spring is provided between a spring seat disposed on the axis of the shaft and facing a shift member with respect to the select operation direction, the shift member and the spring seat are A select stopper device characterized in that a slide stroke corresponding to a select amount is provided in between, and a select damper made of an anti-vibration material is attached to one of the opposing end surfaces.