JPH032057Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a shift lever positioning device for a transmission which is equipped with a guide plate for shift operation and changes gears by operating the shift lever along a groove formed in the guide plate. Regarding.

[Conventional technology]

It is necessary to position the shift lever at the operating position so that the shift lever does not move out of the operating position due to vibrations of the aircraft.

A conventional gear shift lever positioning device had the configuration shown in FIG. 5 of the drawings. That is, a rubber piece 11 is attached to the groove 6a of the gear shift operation guide plate 6, and the width of the groove 6a at the intermediate portion between the gear shift operation position and the gear shift operation position is made narrower than the shaft diameter of the gear shift lever 5. The operating position of the gear shift lever was determined by providing movement resistance to the shift lever.

[Problem that the invention attempts to solve]

In the conventional shift lever positioning device described above, the rubber piece tends to deteriorate quickly, and its durability is poor. The present invention aims to provide a shift lever positioning device with excellent durability.

[Means for solving problems]

The technical means of the present invention taken to solve the problem is that the gear shift lever positioning device is equipped with a cam body which is held by the gear shift lever so that it can freely move near and far to the guide plate, and a cam body that guides this cam body. It is composed of a bullet that moves toward the plate and urges it, and a convex part that is provided on the guide plate surface approximately in the middle of the shift operation position and that moves the cam body away from the guide plate by abutting it. be.

[Effect]

In the shift lever positioning device configured as described above, when operating the shift lever to another shift position, the shift lever must pass through a position where the convex portion is provided. Therefore, the contact between the convex portion and the cam body becomes a resistance to operating the speed change lever, and this resistance substantially functions as a positioning action of the speed change lever.

[Effect of idea]

Therefore, according to the technical means of the present invention, which positions the gear shift lever by the contact between the cam body and the convex part,
The cam body and the convex portion can be made of a highly durable material such as metal, which has the effect of significantly extending the life of the positioning device compared to conventional positioning devices.

〔Example〕

In this embodiment, an example in which the speed change lever positioning device of the present invention is applied to a speed change device of a walk-behind cultivator will be described.

As shown in FIG. 4 of the drawing, the walk-behind cultivator is composed of an engine section E, running wheels 1, a transmission section T, a tilling section 3, a control handle 4, and the like. In addition, in walk-behind cultivators, since the tilling section 3 is located between the operator and the transmission section T, the transmission operation lever tends to be inevitably long. Therefore, the speed change lever tends to sway due to its own weight, and a speed change lever positioning device is particularly required for walk-behind cultivators.

The speed change lever of the walk-behind tiller is divided into two parts: a main speed change lever 5 and an auxiliary speed change lever (not shown) that switches the main speed between high and low speeds. As shown in FIG. 1 of the drawings, the main shift lever 5 moves between reverse 1st and 2nd gears along a shift guide groove 6a of a shift operation guide plate 6 mounted in a position visible to the operator.
_R1.2 , reverse 3rd and 4th speed _{R3.4 , forward} 1st and 2nd speed _{F1.2 ,}
There are six shift operation positions: 3rd and 4th forward speed _F3.4 , 5th and 6th forward speed _F5.6 , _7th forward speed and _8th forward _F7.8 , and a neutral _position N along the vertical direction. It can be operated. In addition, the code|symbol 7 in a figure is a pawl speed change lever which switches the pawl rotation speed of the tilling part 3 to high and low.

The gear shift lever positioning device is provided for the main gear shift lever 5, and its entirety consists of a cam body 8, a bullet 9, and a convex portion 10, each of which will be explained below. The cam body 8 has a spherical cam surface 8a, and with the cam surface 8a facing toward the guide plate 6, the shaft of the main shift lever 5 is located inward of the body than the guide plate 6. It is slidably fitted onto the outside. In this embodiment, the bullet 9 is composed of a coil spring, and is connected to the main gear shift lever 5.
The spring receiver 9a attached to the shaft portion of the cam body 8 is fitted onto the shaft portion between the spring receiver 9a and the cam body 8, and
is pressed against the back surface of the guide plate 6. The convex portion 10 is
On the back side of the guide plate 6, select the gear shift operation position F ₁ . ₂ mentioned above.
_F5.6 , as _well as _the aforementioned shift operation positions _F3.4 and _F7 .
₈ , a pin is attached to each side of the neutral position N between the cam body 8 and the cam surface 8a of the cam body 8. The positional relationship is such that they pass through each other. Therefore, when _{the main shift lever 5 is operated from the forward shift operation position F 1.2 to F 7} . The robot climbs over the convex portion 10 while moving away from the target.
The lever operating force for overcoming this appears as operating resistance of the main shift lever 5, and the groove 6a of the guide plate 6
Due to both of this and this operating resistance, the main shift lever 5
can be held in place. In this embodiment, as shown by the two-dot chain line in FIG. 1, the cam body 8 and the convex portion 10 are always in contact with each other no matter where the main shift lever 5 is in the forward direction. In a relationship.

[Another example]

In the above-described embodiment, the convex portion 10 is further arranged between the shift operation positions R ₃ . ₄ and F ₁ . ₂ and between the shift operation positions R 3 .
It may be implemented by providing them respectively at _the neutral _position N between R _1.2 and F _3.4 .

The convex portion 10 is formed by folding back the tip of the tongue portion on the neutral position N side of the guide plate 6, or
The guide plate 6 may be formed by stamping.

[Brief explanation of the drawing]

Figure 1 is a plan view of the speed change guide plate, Figure 2 is a view taken along the - line in Figure 1, and Figure 3 is a - line view in Figure 1.
4 is an overall side view of the cultivator, and FIG. 5 is a plan view of a conventional positioning device. 5... Gear shift lever, 6... Guide plate, 6a... Guide plate groove, 8... Cam body, 9... Bullet machine, 10...
Convex part.

Claims (1)

[Scope of utility model registration request] In a transmission device that includes a guide plate 6 for gear change operation and changes gears by operating the gear shift lever 5 along a groove 6a formed in the guide plate 6, a positioning device for the gear shift lever 5 is moved near and far from the guide plate 6. a cam body 8 which is freely held by the speed change lever 5; and a bullet 9 which urges the cam body 8 to move toward the guide plate 6.
and a convex portion 10 which is provided on the surface of the guide plate 6 approximately in the middle of the shift operation position and moves the cam body 8 away from the guide plate 6 by contact.