JPS5925722Y2 - Mounting structure of driven steering wheels - Google Patents

Description

[Detailed description of the invention] The invention consists of a first hemispherical portion formed on the output side of the axle case attached to the aircraft body, and a second hemispherical portion formed on the input side of the transmission case attached to the steering wheel. The drive rotation shaft in the axle case and the operating shaft in the transmission case are connected in such a way that the latter can swing freely around the vertical axis and a closed space is always formed between the two. Regarding the mounting structure of the drive type steering wheel in which the input rotation shaft for the steering wheel is interlocked and connected via the universal joint in the closed space, the purpose thereof is to make simple improvements to the input rotation shaft. ,
The purpose is to make it possible to increase the steering angle of the wheels.

The present invention is characterized in that, in the above-mentioned mounting structure for the drive-type steering wheel, the input rotating shaft has a constricted portion for inserting the edge of the first hemispherical portion. .

In other words, if a universal joint with a bending function that satisfies the strength required for power transmission is adopted, the input rotating shaft for the steering wheel connected thereto will be manufactured integrally with the bending function, making it unnecessarily large. By making use of the fact that the diameter of the first hemispherical portion is small and making a simple improvement by adding a constriction to insert the edge of the first hemispherical portion into the input rotating shaft, we can reduce the performance deterioration in terms of strength. By increasing the rotation angle of the second hemispherical part relative to the first hemispherical part, the turning radius of the vehicle body can be shortened without any problems, especially for workers who need to drive in narrow spaces such as tractors. The present invention is useful.

Next, embodiments of the present invention will be described based on illustrative drawings.

To configure the steering wheel mechanism of a four-wheel drive agricultural tractor, an axle case 3 is attached to the body 1, which can swing freely in the left and right directions around a center pin 2 in the horizontal longitudinal direction. The first hemispherical portion 4, 4 is shaped like
A second portion is formed on the input side of the transmission case 5 respectively
The hemispherical portion 6 is fitted onto the outside, and the bispherical portions 4 and 6 are made relatively swingable around this axis by a vertical shaft 7 called a kingpin, and both 4 and 6 are connected to each other. The steering wheel 8 is attached to the output side of the transmission case 5, and the transmission case 5 is moved to the axle by operating the handle 9. The wheels 8 can be steered by swinging relative to the case 3, and are connected to the engine (not shown) through a differential mechanism (not shown), and the interior of the axle case 3 is connected to the engine (not shown) through a differential mechanism (not shown). A drive rotation shaft 10 and a manual rotation shaft 12 for wheels, which is interlocked and connected to the wheels 8 via a gear transmission mechanism 11 inside the transmission case 5 and inside the transmission case 5, are placed in the closed space A. positioned and interlocked and connected via a universal joint 13 whose vertical bending axis coincides with the kingpin axis,
This is to transmit the rotational force of the engine to the wheels 8.

A flange 13 forming a bending feature of the universal joint 13
The input rotating shaft 12, which has an excessive diameter due to being integrally molded with the input rotating shaft 12, is processed to include a constricted portion 15 into which the opening edge 14 of the first hemispherical portion 4 is inserted during steering operation. The axle case 3 is inserted into two inner edges of the annular rigid dust cover 17 along the entire outer length of the seal ring 16 at the opening edge of the second hemispherical portion 6. A recessed portion 18 is provided so that the second hemispherical portion 4 is closed to the first hemispherical portion 4 due to the crowding of the first hemispherical portion opening edge 14 into the constricted portion 15 and the crowding of the axle case 3 into the recessed portion 18. It is constructed so that the rotation angle of the hemispherical portion 6 can be increased.

Note that the present invention can be adopted not only for agricultural tractors but also for mounting structures for drive type steering wheels of various vehicles.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the mounting structure for a drive-type steering wheel according to the present invention, in which FIG. 1 is a front view of an agricultural tractor, FIG. 2 is a cutaway view showing the wheel steering and transmission mechanism, and FIG. The figure is a sectional view showing the main parts, and FIG. 4 is a plan view showing the dust cover. 1... Airframe, 3... Axle case, 4.
...First hemispherical portion, 5...Transmission case, 6...Second hemispherical portion, 7...Vertical axis, 8...・Wheel, 10... Drive rotation shaft,
12... Input rotating shaft, 13... Mountain joint, 14... Edge, 15... Constriction,
A... Space.

Claims (1)

[Scope of utility model registration request] A first hemispherical portion 4 formed on the output side of an axle case 3 attached to the fuselage 1, and a transmission case 5 equipped with a steering wheel 8.
and a second hemispherical portion 6 formed on the input side of the , the latter is freely swingable around the 7 vertical axes, and the closed space A is always formed by both 4 and 6. , a drive type steering wheel in which a drive rotation shaft 10 in the axle case 3 and a steering wheel input rotation shaft 12 in the transmission case 5 are interlocked and connected via a universal joint 13 in the closed space A. Mounting of a drive type steering wheel, characterized in that the mounting structure is such that a constriction 15 is formed in the input rotating shaft 12 for inserting the edge 14 of the first hemispherical portion 4. structure.