JPH0210305B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a select return device mainly employed in a remote control type speed change operation mechanism.

This type of select return device generally uses separate springs to obtain return forces for each of the high-side and low-side select operations. As a result, not only do two springs become necessary, but the points of action of each spring tend to vary on the high and low sides of the select operation, and a stable select return force may not be obtained. . Also,
One end of each spring is locked to a rotating member related to the selection operation, and the other end is locked to a stationary member. For this reason,
In each individual spring, the points of force application at both ends may be misaligned, causing variations in the select return force, and there is a risk that unreasonable force may be applied to the spring itself.

Note that the above springs are installed in certain limited locations, such as on the support shaft of the member that rotates by the select operation, that is, on the select shaft or the select bell crank shaft, so there is no space available for assembly. It is easily subject to restrictions, has poor assembly workability, and may lead to an increase in the size of the structure depending on the structure.

The present invention makes it possible to obtain a stable select return force in both the high and low directions of the select operation using a single spring, and furthermore, the structure is simplified by effectively utilizing the space of the speed change operation mechanism. The purpose of this invention is to provide a select return device that improves assembly and assembly workability.

In order to achieve this object, the present invention arranges a torsion spring for select return with a set shaft in an area with sufficient space independent of the select shaft or bell crank shaft, and connects both ends of this spring. The extended working arm is locked to the rotary lever part and the fixed lever part that are linked to the select operation so that the point of application of the force is aligned in both the high and low directions of the select operation. It is characterized by:

DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described in detail below with reference to embodiments shown in the drawings.

Figure 1 shows the structure of the shift lever support part in a remote control type gear shift operation mechanism.
In FIG. 3, a shift lever retainer 2 is fixed to a floor 1 of a vehicle body with an appropriate number of bolts 19. On the top surface of this retainer 2,
An upright portion 3 formed by bending a planar shape into a substantially U-shape is erected integrally with this retainer 2. The boss portion 4 of the shift lever support 4 is located on the axis of the select shaft 7 whose both ends are supported by the upright portion 3.
a is rotatably supported. This support 4
includes an arm portion 5 extending upward from the boss portion 4a, and a lever portion 6 extending downward from the boss portion 4a and having an engagement groove 6a at its lower end. On the other hand, on the axis of the shift shaft 10 supported in a cantilever manner with respect to the arm portion 5 of the support 4,
A boss portion 8a of the shift lever 8 is rotatably supported. Further, this shift lever 8 is integrally formed with a shifting lever 9 extending downward from a boss portion 8a, and a pin 9 is attached to the tip of the shifting lever 9.
a is integrally provided in a protruding manner.

A select bell crank 11 having a planar shape as shown in FIG. 3 is disposed on the upper surface of the shift lever retainer 2.
The boss portion 11a is rotatably supported by a bell crank shaft 18 erected on the retainer 2. In this bell crank 11, a spherical part 12a is formed at the tip of one arm 12 bordering on the boss part 11a.
is engaged in a ball joint manner with the engagement groove 6a formed at the lower end of the lever portion 6 of the shift lever support 4 (see mainly FIG. 2). The other arm 1 in the bell crank 11
A pin 13a is integrally provided at the tip of 3 to protrude.

A hook 22 formed at the tip of an inner cable rod 21 of a shifting cable 20 using a push-pull cable is connected to the pin 9a of the shifting lever 9. Further, a hook 25 formed at the tip of an inner cable rod 24 of a selecting cable 23 using a push-pull cable is connected to the pin 13a of the arm 13 of the select bell crank 11. Therefore, the shift lever 8 rotates about the shift shaft 10 in the direction indicated by the arrow A-- in FIG.
When a shift operation is performed in the A direction, the inner cable rod 21 of the shifting cable 20 is pushed or pulled through the movement of the shifting lever 9.
A predetermined shift is then obtained within the transmission (not shown). On the other hand, the shift lever 8
When the shift lever support 4 is rotated around the select shaft 7 in the direction of arrow B-B in FIG. 2, the lever portion 6 of the support 4
The above select bell crank 11 is linked to the movement of
is rotated about the bell crank shaft 18. As a result, the inner cable rod 24 of the selecting cable 23 is pushed or pulled, thereby performing a selecting operation within the transmission.

The above-described shift operation mechanism is equipped with a select return device that functions to return the shift lever 8 to a neutral position (select return position) of its select operation. Therefore, to explain this select return device, as is clear from FIG. 4, which is an enlarged view of a part of FIG. 1, and FIG. 5, which is a cross-sectional view of FIG. A cylindrical set shaft 30 is integrally attached to the upright portion 3 with a bolt 31, utilizing a space below the boss portion 4a of the shift lever support 4. A coiled torsion spring 34 used as a select return spring is assembled on the axis of the set shaft 30. A pair of operating arms 35, 35' are formed at both ends of the spring 34 by extending upward from approximately the center of the spring 34 in the axial direction.

On the set shaft 30, there is provided an actuating arm 3 of the spring 34, which extends upward integrally from the set shaft 30 and is further bent toward the front (to the left in FIG. 4).
A fixed lever portion 32 is formed located between 5 and 35'. Further, the shift lever support 4
A rotary lever portion 33 that protrudes downward is integrally formed on the lower surface of the boss portion 4a.
It is located between 5 and 35'. That is, as is clear from FIG. 5, the fixed lever section 32 is located at a position corresponding to the rotary lever section 35 when the shift lever 8 is in the select return position, and the two operating arms 35 of the spring 34 , 35' are locked to both side surfaces of the lever portions 32, 33 with a predetermined spring force. and,
The points of action of the two working arms 35, 35' (the points of contact with both the lever parts 32, 33) correspond to each other.

In the select return device configured as described above, when the shift lever 8 is selectively operated in the direction of arrow B-B in FIG. 2, the shift lever 8 rotates together with the support 4 about the select shaft 7 as described above. . This rotation of the support 4 causes the rotation lever portion 33, which is formed integrally with the boss portion 4a, to rotate around the selection shaft 7. For example, if the shift lever 8 is selected to the high side (or low side) and the rotary lever section 33 moves in the direction of arrow P in FIG.
One of the working arms 35 moves in the same direction as the rotating lever portion 33. However, the other operating arm 35' of the spring 34 is engaged with the side surface of the fixed lever portion 32 and is held at the previous position. As a result, spring 3
4 is applied with a twisting force, which generates a moment in the return direction. Therefore, if the select operation force on the shift lever 8 is released from this state, the shift lever 8 will return to the select return position by the elasticity of the spring 34.

Note that when the rotary lever section 33 moves in the opposite direction to the arrow P, the working arm 35' moves together with the rotary lever section 33, contrary to the above, and the other working arm 35 moves in the direction opposite to the arrow P. The spring 34 provides the select return action in the same manner as described above.

Since the mutual action points of both action arms 35 and 35' in the torsion spring 34 correspond to each other as described above, this spring 34
The above select return force is equally stable on both the high and low sides. Further, since the points of action of both the action arms 35 and 35' are coincident with each other in this way, it is possible to avoid unreasonable "twisting" or the like from acting on the spring 34.

Furthermore, each member for obtaining the above select return force is the boss portion 4 of the shift lever support 4.
Since it is assembled using the free space below a, it is possible to avoid increasing the size of this device, and
Assembly work is also facilitated. Note that when there is no space for assembling the select return device inside the upright portion 3 of the shift lever retainer 2,
Alternatively, if the assembly work is difficult, as shown in FIG.
0, the torsion spring 34 and other related members may be assembled. However, in this case, the rotating lever portion 33 extends from a part of the shift lever support 4 to the outside of the upright portion 3.

As described above, the present invention generates an equal moment in the torsion spring in both the high and low directions of the select operation, and also avoids unreasonable "kinking" of this spring. Stable select return force can be obtained on both the high and low sides. Furthermore, by arranging the select return spring at a location completely independent of the select shaft and bell crank shaft, the present invention makes effective use of space, avoids complicating the structure and increasing its size, and improves assembly work. It is possible to improve the

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a partially cutaway side view showing the structure of the shift lever support part of a remote control type speed change operation mechanism, and FIG. 2 is a partial view from the right side of FIG. 1. 3 is a broken plan view of the shift lever, 4 is an enlarged side view of the main parts of 1, and 5 is a cross section taken along the line - 4 in 4. FIG. 6 is a side view showing a different embodiment in correspondence with FIG. 4. 4...Shift lever support, 7...Select shaft, 8...Shift lever, 11...Select bell crank, 18...Bell crank shaft, 30...Set shaft, 32...Fixed lever part, 33...times Moving lever part, 34...Torsion spring, 35,
35'... Working arm.

Claims (1)

[Claims] 1. A shift lever support is rotatably attached to the shift lever retainer by a select shaft, and a select bell crank that is linked to the rotation of this support is also rotatably mounted to the shift lever retainer by a bell crank shaft. It is a shift operation mechanism that is movably mounted, and has a spring set shaft disposed in a separate part from the select shaft or the bell crank shaft, and a single toe as a select return spring is mounted on this set shaft. For each lever part, a spring is provided, and both ends of this spring are extended to form a pair of working arms, and these working arms are both protruded from a rotating member related to a selection operation and a fixed member therefor. A select return device characterized in that the select return device is locked in a state in which the points of force are aligned in both the high side and low side directions of the select operation.