JPS6331134Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a wire-type speed change operation mechanism for automobiles.

(Prior Art) Generally, a wire-type transmission operation mechanism for an automobile transmits shift and selection operations of a change lever to a transmission via a wire. Conventionally, in four-wheel drive vehicles equipped with a 2/4 switching device that switches between four-wheel drive and two-wheel drive for the front or rear wheels, the entire transmission becomes large and is subject to space constraints, so the above-mentioned In many cases, a wire-type gear shift operation mechanism such as the one used is used. In order to smoothly perform shift and select operations of the change lever in this wire-type gear shift operation mechanism, it is desirable that the change lever automatically return to the neutral position when the change lever is released from shifting. .

In order to automatically return the change lever to the neutral position, as shown in Japanese Utility Model Application No. 57-147120, a bell crank rotated by the select operation of the change lever is proposed. There is one in which a select return spring made of a torsion spring is installed on the pin shaft, and the change lever is returned to its original position by the spring force. However, this conventional wire-type speed change operation mechanism has drawbacks such as difficulty in setting the spring force to a predetermined spring force when manufacturing the torsion spring, and the change lever may not return to the neutral position reliably. .

(Purpose of the invention) In view of the above-mentioned conventional problems, this invention aims to provide a wire-type speed change operation mechanism that allows the change lever to reliably and smoothly return to the neutral position.

(Structure of the invention) In order to achieve the above-mentioned purpose, this invention has a bell crank which is coaxially rotated in conjunction with the bell crank which is rotated in conjunction with the select operation of the shift lever.
One end of each lever is connected by a coil spring, and the other end is engaged with a pair of opposing stopper parts formed on the change lever retainer and a pair of opposing stopper parts formed on the bell crank. The spring force of the coil spring causes the other end of each of the interlocking levers to come into contact with each of the stopper portions, thereby always biasing the bell crank toward the neutral position.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

1 to 3 show a wire-type speed change operation mechanism according to an embodiment of the present invention. A change lever retainer 1 is attached to the passenger compartment floor, and the change lever retainer 1 is provided with a change lever 2 and a 2/4 switching lever 3, and the 2/4 switching lever 3 has front wheel or rear wheel drive and four wheel drive. This is for switching. A change lever mounting portion 4 having a substantially inverted U-shape in plan is integrally formed approximately in the center of the change lever retainer 1.
A horizontal bearing portion 5a of the character-shaped support 5 is rotatably attached. On the other hand, a cylindrical bearing part 2a is formed at the lower part of the change lever 2, and the bearing part 2a
is rotatably fitted on the outer periphery of the vertical shaft portion 5b of the T-shaped support 5, and in this way, the change lever 2 is connected to the change lever retainer 1 for shifting operations in the left and right directions in FIG. Figure 2: It is installed so that it can be operated in the vertical direction.

A shift lever portion 6 is formed at the lower end of the change lever 2, and a wire (not shown) for shifting a transmission (not shown) is connected to the lower end of the shift lever portion 6. Further, a select lever portion 7 extending downward is formed on the horizontal bearing portion 5a of the T-shaped support 5, and at the lower end of the select lever portion 7 is one end of a generally dogleg-shaped bell crank 8, which is a select lever member. are rotatably connected. This bell crank 8 is rotatably attached to the change lever retainer 1 by a pin shaft 9, and is configured to rotate around the pin shaft 9 by selecting the change lever 2. One end of a wire (not shown) for selecting a transmission is connected to the other end of the bell crank 8.

Two levers (interlocking levers) 10 and 11 are coaxially provided on the pin shaft 9, and the lever 1
0 and 11 are adapted to rotate in conjunction with the bell crank 8 by claw bodies 8a and 8b formed on the bell crank 8. Each lever 1
One end of 0,11 is connected by a coil spring 12, and the other end is connected to the above-mentioned change lever retainer 1.
A pair of stopper parts 1 formed opposite to each other.
3 and 14 are abutted and locked.

Next, the operation will be explained.

When the change lever 2 is in the neutral state, the levers 10 and 11 are brought into contact with the claws 8a and 8b of the bell crank 8 by the spring force of the coil spring 12, as shown in FIG. stopper part 13 of the change lever retainer 1,
14 and is abutted and locked.

For example, when the change lever 2 is operated in a downward direction in FIG.
The bell crank 8 rotates around a.
rotates around the pin shaft 9 in the direction of arrow A in FIG. 3, and the transmission is selected. At this time, as the bell crank 8 rotates, one lever 10 is pushed by the claw body 8a of the bell crank 8 and rotates in the same direction as the bell crank 8, and the other lever 11 is rotated in the same direction as the bell crank 8. Rotation is restricted by the stopper portion 14, and thus only the lever 10 rotates in the direction of arrow A, and the coil spring 12 is in a tensioned state. When the change lever 2 is shifted, the change lever 2 rotates around the vertical shaft portion 5b of the T-shaped support 5 while being held in the selected state, and the transmission is shifted.

Next, when the change lever 2 is released from the shifted state, the change lever 2 can again rotate around the horizontal bearing portion 5a of the T-shaped support 5, that is, can be operated for selection. Then, since the tensile force of the coil spring 12 is acting on the rotated lever 10, the lever 10 rotates in the direction opposite to the direction A, and the bell crank 8
When the lever 10 comes into contact with the stopper part 13 of the change lever retainer 1, the bell crank 8 returns to its original neutral state, thereby returning the change lever 2 to the neutral position. That will happen.

In the device of this embodiment as described above, the bell crank is rotated back by the spring force of the coil spring, and the bell crank is positioned in the neutral state by the stopper part of the change lever retainer. Even if there are variations in the spring force of the spring, the change lever can be reliably and smoothly returned to the neutral position. Also, since the change lever is rotated and returned to its original position by the tensile force of the coil spring, the spring force is weaker than when the change lever is returned to its rotational position by the torsion spring force of the torsion spring, as in conventional devices. Good and durable. Furthermore, in this device, the ends of the two interlocking levers are brought into contact and locked by a pair of opposing stoppers provided on the retainer, so each stopper has a neutral position for the change lever. The large spring biasing force required for the biasing force is applied only from one direction, and the strength against the biasing force is easily ensured. Therefore, this locking structure can be used to bias the change lever to the neutral position. Also, since each stopper part on the bellcrank side and the retainer side comes into contact with the side end of each interlocking lever to which the coil spring is not connected, the other end of the both interlocking levers to which the coil spring is connected is Regardless of the shape of the select lever member, it can be placed at any position, facilitating layout.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications and changes are possible.

(Effects of the invention) As described above, according to the wire-type shift operation mechanism according to the invention, the gear shift operation mechanism rotates coaxially and in conjunction with the bell crank, which is rotated in conjunction with the select operation of the shift lever. Two levers are provided, one end of each lever is connected by a coil spring, and the other end is connected to a pair of opposing stopper portions formed on a change lever retainer and a pair of opposing stopper portions formed on a bell crank. The spring force of the coil spring causes the other end of each of the interlocking levers to come into contact with each of the stoppers, and the bell crank is always biased to the neutral position. It can be returned to the neutral position reliably and smoothly, and the use of a coil spring has the effect of widening the degree of freedom in setting the load.
Furthermore, the other ends of the two interlocking levers, to which the coil springs are not connected, are abutted and locked by a pair of opposing stoppers provided on the retainer, so that the change levers are biased to the neutral position. For the large spring biasing force required,
Force is applied only from one direction to each separate stopper portion, and it is easy to ensure strength against the biasing force. Therefore, this locking structure can be used to bias the change lever to the neutral position. Furthermore, in the present invention, since both stoppers are brought into contact with the other end sides of the two interlocking levers, the one end side of the two interlocking levers to which the coil springs are connected can be positioned at any position regardless of the shape of the select lever member. Easy to place and layout.

[Brief explanation of the drawing]

FIG. 1 is a side view of a wire-type speed change operation mechanism according to an embodiment of the present invention, FIG. 2 is a plan view of the mechanism, and FIG. 3 is a plan view of essential parts of the mechanism. 1...Change lever retainer, 2...Change lever, 8...Bell crank (select lever member), 9...Pin shaft, 10, 11...Lever (interlocking lever) 12...Coil spring, 13,
14... Stopper section.

Claims (1)

[Scope of utility model registration request] A change lever capable of shifting and selecting operations is attached to the change lever retainer, and a select lever member that is rotated by the select operation of the change lever is rotatably attached to the retainer by a pin shaft, A wire for selecting a transmission is connected to the select lever member, and two levers that rotate in conjunction with the select lever member are coaxially provided on the pin shaft, and one end of each lever is connected to a coil. They are connected by a spring, and the other end is locked by a pair of opposing stopper parts provided on the retainer and a pair of opposing stopper parts provided on the select lever member, and each of the levers is moved by the spring force of the coil spring. A wire-type speed change operation mechanism, characterized in that the select lever member is in contact with each of the stopper portions so as to urge the select lever member to a neutral position.