JPS6330U - - Google Patents

Description

[Brief explanation of drawings]

The drawings show an embodiment of the operation structure for running an agricultural tractor according to the present invention, in which Fig. 1 is a partially cutaway front view of the transmission, Fig. 2 is a cross-sectional view taken along the line - - of Fig. 1, and Fig. The figure is a partially cutaway front view of the spring installation part, Figure 4 is a perspective view of the cylinder shaft stopper and the spring member, Figure 5 is a cross-sectional view taken along the line V-V in Figure 1, and Figure 6 is the FIG. 7 is a plan view of the cam mechanism, FIG. 8 is a side view of the interlocking mechanism, and FIG. 9 is a partially cutaway side view of the entire agricultural tractor. 1a, 1b...Front wheel, 2a, 2b...Rear wheel, 5...Handle, 11...Interlocking member, 14...
Mission case, 15...Transmission device, 26...
Shifter, 30... First rotation interlocking tool, 31... Interlocking tool, 32... Supporting member, 34... Second rotation interlocking tool, 43... Interlocking mechanism, 50... Component, 53
...Operating mechanism.

Claims (1)

[Scope of utility model registration request] A first four-wheel drive state in which the average peripheral speed of the left and right pair of steerable wheels 1a, 1b and the average peripheral speed of the left and right pair of rear wheels 2a, 2b are the same or almost the same, for the front wheels 1a, 1b. One shifter 26 for each of a two-wheel drive state in which transmission is cut off and a second four-wheel drive state in which the average circumferential speed of the pair of front wheels 1a, 1b is higher than the average circumferential speed of the pair of rear wheels 2a, 2b. Therefore, a transmission 15 that can be freely switched between the two-wheel drive state is installed in the transmission case 14, and when the steering angle of the front wheels 1a, 1b is less than a set value, the transmission 15 changes to the first one.
is in a four-wheel drive state, and the front wheels 1a, 1
The front wheels 1a, 1b and the steering handle 5 thereof are interlocked so that the transmission 15 is automatically switched to the second four-wheel drive state when the steering wheel b is steered beyond the set value. The member 11 is provided with an interlocking mechanism 43 that interlocks the shifter 26, and the interlocking tool 31 constituting the interlocking mechanism 43 is connected to the interlocking tool 3.
1, and is located closer to the interlocking member 11 than the interlocking tool 31 so as to rotate together with the first rotation interlocking tool 30 provided through the mission case 14. Second
The first rotary motion tool 30 is attached to a portion located outside the mission case 14 so as to be integrally rotatable and slidable so as to be engaged with and disengaged from the rotation interlocking tool 34, and the interlocking tool 31 can be slid and rotated. an operating mechanism for switching the interlocking mechanism 43 between an interlocking state and a non-interlocking state, and switching the transmission 15 between the first four-wheel drive state and the two-wheel drive state when the interlocking mechanism 43 is in the non-interlocking state; 53, in which a spring 33 for biasing the shifter 26 to a position where the transmission 15 is in the first four-wheel drive state is attached to the interlocking tool 31; A support member 32 for one end of the spring 33 is placed in contact with a member 50 constituting the operating mechanism 53, so as to position the shifter 26 at a position where the transmission 15 is in the two-wheel drive state. A driving operation structure for an agricultural tractor attached to the transmission case 14 in the state.