JPS6228511Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a rotary drive case for an intertilling rotary connected to an agricultural movement management machine.

The above-mentioned management machine is equipped with the ability to change forward and reverse, but if it changes to reverse when the intertilling rotary is driving or can be driven, it is dangerous for the operator, so it is not possible to change to reverse when using the intertilling rotary. A backstop is provided on the management machine side to prevent changes from occurring.

On the other hand, the rotary drive case that transmits power to the interpolation rotary is configured with a 3-position, 2-speed transmission device of 1st speed, neutral, and 2nd speed, but the speed change lever that operates this speed change is centered around the neutral position. The gear shifting operation has different operating directions, such as left and right directions, or front and rear directions.

Therefore, the object of this invention is to provide a rotary drive case that has the function of operating a backstop that is operated in one direction by the above-mentioned shift levers that operate in different shift directions.

According to this invention, a cam is provided in series near the rotational fulcrum of the gear shift lever, and an actuating piece that rotates in conjunction with the backstop rod is provided opposite to the cam. Since the cam is configured to project into the rotation locus of the operating piece at the second speed shift position, the backstop can be operated in conjunction with the shift lever, and the structure is simple.

An embodiment of this invention having such characteristics will be described in detail below based on the drawings.

The drawings show a rotary drive case for an intermediate tillage rotary, and in FIGS. 1 and 2, case 1 is formed by joining and fixing case split bodies 2 and 2 which are formed by dividing into left and right parts, and further includes case split body 2. , 2 form an opening on each side, and a projecting lid 3 is bonded and fixed to the opening, and a transmission (not shown) is configured in the space formed by the left and right projecting lids 3. Ru.

One of the protruding lids 3 is provided with a shaft end of a shift fork shaft 4 that operates the aforementioned transmission device, protruding outward from the side surface, and this shift fork shaft 4 slides in the in/out direction to provide high speed/neutral control.・Perform low-speed 3-position, 2-speed operation.

The above-mentioned overhanging lid 3 has a support piece 5 on the rear side near the speed change fork shaft 4, and a locking piece 6 on the lower side near the speed change fork shaft 4, which are formed integrally with the overhanging lid 3. is prominent.

The intermediate portion of a shift lever 7 for operating the shift fork shaft 4 in and out of the shift lever 7 is pivotally attached to the support piece 5 by a pin 8, and the front end of the shift lever 7 is bifurcated to engage the shift fork shaft 4. It is fitted between stoppers 9, which are connected to the shaft end.

A boss portion 10 is provided at the fulcrum portion of the aforementioned gear shift lever 7.
Two cams 11, 11 are provided on the case 1 side of the boss portion 10 to project when the shift lever 7 is operated to a high speed and a low speed shift position.

Further, an L-shaped link 12 is located at a position facing the above-mentioned cams 11, 11, and this link 12
The middle part of the link 12 is pivotally connected to the above-mentioned support piece 5 by a pin 13, and the operating side 1, which is one side of the link 12,
4 is in contact with the cams 11, 11, and a backstop rod 15 is connected to the free end of the other side.

A spring 17 is tensioned between the locking piece 16 provided on the rear end side of the shift lever 7 and the locking piece 6, and this spring 17 sets the shift lever 7 between high and low speeds. It is energized at the position, the acting force is neutralized at the neutral position, and it is set at each position.

In the rotary drive case 1 thus constructed, when the speed change lever 7 is in the neutral position, the operating piece 14 of the link 12 is in contact with either of the cams 11, 11.
Since it does not come into contact with the ground, reverse change operation is possible from the tiller side.

When the shift lever 7 is moved to the high speed or low speed position, either of the cams 11, 11 will push the operating side 14 of the link 12, which will pull the backstop rod 15 and move the control machine side. The backstop is activated and prevents the vehicle from changing to reverse.

3 and 4 show another embodiment of the speed change lever 7. When the speed change lever 7 is in the neutral position, a cam 11 is connected to the upper surface side of the front central part of the boss portion 10. Operating pieces 18, 1 on the left and right with respect to 11
The ends of the link 12 are formed into a forked shape so that the two ends are opposed to each other, and a backstop rod 15 is connected to the case 1 side by a pin 19 at the middle part of the link 12.

When the shift lever 7 configured in this manner is operated from the neutral position to the high speed or low speed position, the cam 11 pushes up the actuating pieces 18, 18 of the link 12, thereby causing the backstop rod 1 to move upward.
5 is pulled and the backstop on the management machine operates.

5 and 6 show still another embodiment of the speed change lever 7, in which the speed change lever 7 is operated to change speed in the front and rear direction, and a link-shaped cam 20 is provided on the case 1 side of the speed change lever 7. The speed change lever 7 is urged by a spring (not shown) so as to be in constant contact with the link-shaped cam 20. Shift positions of high speed, neutral speed, and low speed are set on the circumference of the ring-shaped cam 20 described above.

Cam protrusions 21, 21 are connected to the boss portion 10 of the aforementioned gear shift lever 7 at the upper and lower positions and slightly toward the front. The cam projections 21, 21 and the pins 22, 22 are separated from each other when the gear shift lever 7 is in the neutral position. and link 12
A backstop rod 15 is connected to the backstop rod 15.

When the shift lever 7 configured in this manner is operated from the neutral position to a forward or backward low speed/high speed shift position, the cam protrusions 21, 21 move against the pins 22, 22.
The backstop rod 15 is engaged through the link 12 and the backstop rod 15 is engaged to operate the backstop on the management machine side.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention; FIG. 1 is a partial side view of the rotary drive case, FIG. 2 is a plan view of the gear shift lever, and FIG. 3 is a side view of another embodiment of the gear lever. , Figure 4 is its plan view,
FIG. 5 is a side view showing still another embodiment of the speed change lever portion, and FIG. 6 is a developed view of the ring-shaped cam. 1... Case, 4... Speed fork shaft, 7...
Gear shift lever, 10...Boss part, 11...Cam, 1
2...link, 15...backstop.

Claims (1)

[Scope of utility model registration request] A speed change fork shaft is protruded from the side surface of the rotary drive case, and a speed change lever is provided to operate the shift fork shaft in and out of 1st speed, neutral, and 2nd speed by rotational movement, and the rotation fulcrum of this speed change lever is provided. A cam is provided adjacent to the cam, and an actuating piece that rotates in conjunction with the backstop rod is provided opposite to the cam. A rotary drive case characterized by being configured so as to protrude within a rotation locus.