JPS581062Y2 - Change lever device in power tiller - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a change lever device in a power tiller using an engine as a power source.

Conventionally, this type of device has a change lever that extends rearward approximately horizontally on the upper surface of a transmission on a vehicle body frame that has wheels on the lower surface, and a downward tilting position that changes the reverse gear and the forward low gear, and a change lever that resists the forward high gear. The lever is provided so as to be freely switchable to an upper tilting position for folding, and the lever can also be freely switched to a position extending substantially horizontally forward, so that in this position, the high-speed gear bends to a lower tilting position. Although similar types of gears are known, in such a gear, when the lever is rotated to the forward position, it is dangerous to tilt the lever downward to perform a high-speed stage bending.

That is, the lever rotates forward when the handle column extending rearward and upward of the vehicle body frame is rotated forward, and the operator is generally positioned in front of the vehicle body frame, that is, in the forward movement direction. Thus, when the vehicle body frame moves forward, the operator must continue to move backwards, and there is a danger that the operator may follow the high-speed advance of the vehicle body frame.

The purpose of the present invention is to obtain a device free from such dangers.The present invention has a change lever 4 extending rearward approximately horizontally on the upper surface of a transmission 3 on a vehicle body frame 2 having wheels 1 on the lower surface, and a reverse gear. The lever 4 is provided so as to be freely switchable between a lower tilting position for bending the low forward speed gear and an upper tilting position for bending the forward high speed gear, and the lever 4 can also be freely switched to a position extending substantially horizontally forward. In this type, a shift arm 5 provided at the root of the change lever 4 is provided with a guide arm 12 extending rearward so as to project from the shift arm 5 provided at the root of the change lever 4. The guide 7-m 12 faces the guide groove 13 of a plate member 200 provided on the mission 3, and the lever 4 is attached to the plate member 20.
The lever 4 is characterized in that a stopper 19 is provided below the switching rotation position extending forward of the lever 4 to prevent the lever 4 from tilting downward.

The root of the change lever 4 extends downward approximately vertically and is loosely inserted into a cylindrical shaft 6 fixed near the root of the shift arm 5 below it, and is pivoted up and down in the cylindrical shaft 6 about a shaft 7. A locking piece 10 is loosely inserted into a vertical shaft hole formed in a movable support arm 8, and the root of the lever 4 is elastically repelled downward by a spring 9, and a locking piece 10 is fixed to the upper part of the lever 4.
The arm 5 is fitted into a groove 11 on the upper surface of the arm 5 facing the arm 5, and as the lever 4 swings up and down, the arm 5 is tilted up and down, and the lever 4 is also swung left and right. According to the movement, the arm 5 is swung left and right, and accordingly, the two high-speed stages, reverse movement, and low-speed two stages are made to move, and the lever 4 is once moved against the spring 9. The locking piece 10 is moved upward to disengage the locking piece 10 and the groove 11, and then the locking piece 10 is rotated to switch between the front position and the rear position.

Furthermore, the root portion of the shift arm 5 is extended rearward to form a guide arm 12, which then faces into an upper guide groove 13. It consists of a transverse groove 14 at the end and a transverse groove 15 at the front end corresponding to the second and third forward speed stages, so that the shift arm 5 is guided during the above-mentioned bending operation.

According to the present invention, as described above, the stopper 19 is provided at the lower side of the front position of the change lever 4 and faces it, and the switcher 19 is made of, for example, rubber, and is attached to the upper surface of the main body of the transmission 3 with, for example, a screw. The lever 4 is fixedly provided so that the stopper 19 prevents the lever 4 from tilting downward to break the high speed stage.

As clearly shown in FIG. 1, the vehicle body frame 2 includes an engine 17 located in front of the transmission 3 and connected thereto via a belt 16, and has a handle column 18 that extends diagonally upward and is switched to a position that extends rearward. Be prepared to rotate freely.

To explain its operation, the change lever 4 is normally located in a so-called rear position extending approximately horizontally rearward as shown by the solid line in FIG. In this state, if the shift arm 5 is tilted downward and then moved left and right as shown in Fig. 2, the shift arm 5 will be tilted upward and rocked left and right. However, next time, move the lever 4 to the second
When the shift arm 5 is tilted upward and moved left and right as shown by the chain line in the figure, the shift arm 5 is tilted downward and moved left and right, and the high speed gear is bent.

Next, in a working state in which the operator moves to the front of the vehicle body frame 2 with the handle column 18 in the rear position, the lever 4 is rotated from the aforementioned rear position to the forward position shown by the chain line in FIG. Storm on.

In this state, if the lever 4 is tilted upward and moved left and right, the shift arm 5 will be tilted upward and moved left and right, causing the reverse gear or low gear to be bent, but then the high gear to be bent. When the lever 4 is pressed down to move downward as shown by the dotted line in FIG. .

Therefore, in a working state in which the operator is located at four positions on the vehicle body frame 2, the vehicle body frame 2 is not caused to move forward at high speed, which is safe.

In this way, the sharpener according to the present invention has a guide arm 1 extending rearward on the shift arm 5 provided at the root of the change lever 4.
2 is provided protrudingly, and the arm 12 faces the guide groove 13 of the plate member 200 provided on the transmission 3, so that the change lever 40 can be easily guided and its guidance is ensured, making the switching operation easy. Since the plate member 20 is provided with a stopper 19 below the switching rotation position extending forward of the lever 4 to prevent the lever 4 from tilting downward, the stopper 19 can be easily attached. .

[Brief explanation of the drawing]

Fig. 1 is a side view of a power tiller equipped with the device of the present invention, Fig. 2 is an enlarged cutaway side view of the main parts thereof, and Fig. 3 is a plan view thereof.

Claims (1)

[Scope of utility model registration request] A change lever 4 extending rearward approximately horizontally is mounted on the upper surface of the transmission 3 on the vehicle body frame 2 having the wheels 1 on the lower surface.
The lever 4 is provided so as to be freely switchable between a downward tilting position where the reverse gear and the forward low gear are bent, and an upper tilting position where the forward high gear is folded, and the lever 4 is further switched to a position where it extends substantially horizontally forward. In a change lever device for a power cultivator configured to be freely rotatable and in which the bending of the high speed stage is at a downward C tilting position, a shift arm 5 provided at the root of the change lever 4 extends rearward. Guide arm 12
is provided protrudingly so that the guide arm 12 faces the guide groove 13 of a plate member 20 provided on the mission 3, and a lower eyelid lever at the switching rotation position extending forward of the lever 4 is attached to the plate member 20. 4. A change lever device for a power tiller, characterized in that a stopper 19 is provided to prevent downward tilting of the power cultivator.