JPS609103Y2 - A protection member for protecting the thrust bearings, etc. in the open front wheel support system of four-wheel drive agricultural vehicles from muddy water, etc. - Google Patents

Description

[Detailed description of the invention] The present invention relates to a protection member for protecting the thrust bearing, waterproof gear, etc. in the open type front wheel support device of a four-wheel drive agricultural vehicle from muddy water. The rotating shaft support between the axle case and drive shaft case of the open type front wheel support device is completely waterproof and dustproof, and if the function of the rotating drive part deteriorates due to long-term use, it can be easily replaced with a new protection member. It is an object of the present invention to provide a protection member which can be replaced with other members and which can improve the durability of an open type front wheel support device.

In the conventional front wheel support device of a four-wheel drive agricultural vehicle, the axle case that supports the front wheel is rotatably supported on the drive shaft case to enable the front wheel to turn, and a king pin located on the axle support is used. A spherical sealing method was used at the joint of both cases to make the universal joint waterproof and dustproof.
This system had a complex structure, required high precision machining and assembly, and also limited the turning angle of the front wheels.

In order to improve this system, an open type front wheel support device has been proposed that is easy to process and assemble, has a simple structure, and has a much larger front wheel turning angle. The support device includes a universal joint that connects the transmission mechanism and drive mechanism of the axle case, an upper and lower kingpin that rotatably supports the axle case and the drive shaft case, and waterproof and dustproof parts for the thrust bearing provided on the lower kingpin. is necessary.

In view of these circumstances, the present invention provides a protection member for protecting the thrust bearing, waterproof gear, etc. of an open type front wheel support device from muddy water, in order to further achieve the above-mentioned object of the present invention.

That is, in the present invention, a drive shaft extending from a drive shaft case is interlocked and connected through a waterproof universal joint into an axle case that pivotally supports a front wheel, and the upper beam and The lower beam is extended inward, and the upper shaft bearing part and the lower shaft bearing part are extended in a bifurcated manner so as to sandwich the waterproof universal joint from the upper and lower outer ends of the drive shaft case, and the upper shaft bearing part is located below the upper beam, the lower shaft bearing is located above the lower beam, the upper kingpin is inserted through the upper beam and installed inside the upper shaft bearing, and the knuckle is attached to the upper end of the upper kingpin. Fix the arm, loosely fit the lower end into a metal that is tightly fitted to the upper shaft bearing, install an O-ring between the metal, and also penetrate the lower kingpin into the lower beam and install it inside the lower shaft bearing. The lower end of the lower kingpin is fixed to the lower surface of the lower beam, O-rings are attached to the upper and lower ends, respectively, and the thrust bearing is fitted onto the lower kingpin between the lower beam and the lower shaft bearing to make it waterproof. a tool is provided along the outer periphery of the thrust bearing;
To protect the thrust bearing, waterproof gear, etc. in the open front wheel support device of a four-wheel drive agricultural vehicle, in which the axle case and drive shaft case are rotatably supported concentrically by upper and lower king pins, from muddy water, etc. It relates to a protection member of
The protection member is composed of a shaft bearing and a cylindrical cover formed integrally with the shaft bearing, and the shaft bearing is press-fitted into the lower shaft bearing portion and is fixedly fitted with no rotation, and the inner surface of the shaft bearing and the lower king pin are fixedly fitted. The cover is used by being attached so that it rotates and slides on the outer surface, and the cover is provided with a notch of an appropriate shape on the inside so that the notch covers the thrust bearing and waterproofing device. It is used by being installed between the lower beam and the lower shaft bearing.

The present invention will be specifically described below based on the drawings illustrated below.

8 is a four-wheel drive agricultural vehicle, and the agricultural vehicle 8 includes front wheels 9, an engine 10, a steering wheel 11, a rear wheel 12, and a seat 13.

14 is an axle case, and the axle case 14 pivotally supports a front axle 15 that supports the front wheel 9, and has a large gear 16 wedge-fitted on the front axle 15 and a small gear 17 that meshes with the large gear 16 built therein. ing.

Reference numeral 18 denotes an upper beam, and the upper beam 18 extends inward from the upper end of the axle case 14.

1 is a lower beam, and the lower beam 1 extends inward from the inner center of the axle case 14.

Reference numeral 19 denotes a drive shaft case, and the drive shaft case 19 pivotally supports a drive shaft 20 that supplies power to the front wheels 9.

Further, an upper shaft bearing part 21 and a lower shaft bearing part 2 extend in a bifurcated shape from the upper and lower outer ends of the drive shaft case 19, and the upper shaft bearing part 21 is located below the upper beam 18, and the lower shaft bearing part 21 is located below the upper beam 18, and The shaft bearing part 2 is the lower beam 1
It is located above the .

22 is an upper kingpin, and the upper kingpin 22 passes through the upper beam 18 and is installed in the upper shaft bearing part 21.

3 is a lower king pin, and the lower king pin 3 passes through the lower beam 1 and is installed in the lower shaft bearing part 2.

The axle case 14 and the drive shaft case 19 are rotatably supported concentrically by the upper and lower king pins 22.3.

23 is a waterproof universal joint, the drive shaft 20 is wedged into the inner diameter portion of one end, and the pinion gear 17 is wedged into the shaft portion of the other end.

24 is a knuckle arm, and the knuckle arm 24
is fixed to the upper end of the upper king pin 22 and to the upper surface of the upper beam 18.

Reference numeral 25 denotes a metal fitting tightly into the upper shaft bearing portion 21, and the lower end portion of the upper kingpin 22 is loosely fitted into the metal 25.

Further, an O-ring 26 is attached to the lower end of the upper kingpin 22 between it and the metal 25 to prevent muddy water from entering.

Reference numeral 27 is a rotation stop, and 28 is a bolt, and the lower end of the lower kingpin 3 is fixed to the lower surface of the lower casing 1 by the rotation stop 27 and the bolt 28.

Reference numeral 29 denotes waterproof O-rings attached to the upper and lower ends of the lower king pin 3.

Now, 4 is the thrust bearing, 5 is the waterproof gear, 6 is the cover, and 7 is the
is a bearing, the thrust bearing 4 is fitted onto the lower king pin 3 between the lower beam 1 and the lower bearing part 2, the waterproofing device 5 is located along the outer periphery of the thrust bearing 4, and the cover 6 It is provided inside the lower end of.

The bearing 7 is press-fitted into the lower bearing part 2 and is fixedly fitted without rotation, and the upper end of the lower kingpin 3 is loosely fitted into the bearing 7.
The inner surface of the bearing 7 and the outer surface of the lower king pin 3 are adapted to rotate and slide.

The cover 6 is formed integrally with the bearing 7 and has a cylindrical shape, and a notch of an appropriate shape is provided inside the cover 6.

The cover 6 is installed between the lower beam 1 and the lower shaft bearing part 2.

The protection member according to the present invention is integrally constituted by the above-mentioned bearing 7 and the above-mentioned cylindrical cover 6, and the thrust bearing 4 is formed by a notch inside the cover 6.
and is used to cover the waterproof gear 5.

Therefore, the shielding member according to the present invention has a simple shape and structure, is easy to use, and is suitable for protecting the thrust bearing 4 and waterproofing device 5 from muddy water.

Not only that, but due to long-term use of such a protection member, if the inner surface of the bearing 7 wears out and the ability of the lower kingpin 3 to support the rotation of the lower beam 1 and the lower bearing part 2 deteriorates, Since it is possible to easily pull out the bearing 7 press-fitted into the lower bearing part 2, remove it together with the cover 6, and replace it with a new protection member, it is possible to improve the service life of the open type front wheel support device. There is a great advantage that it can be done.

[Brief explanation of the drawing]

The attached drawings illustrate embodiments of the present invention, in which Fig. 1 is a side view of a four-wheel drive agricultural vehicle, and Fig. 2 is a side view showing the state of shaft support between the axle case and the drive shaft case. FIG. 3 is a partially enlarged view of FIG. 2, and FIG. 4 is a sectional view showing the structure and usage state of the protection member according to the present invention. In these drawings, 1 is a lower beam, 2 is a lower shaft bearing, 3 is a lower kingpin, 4 is a thrust bearing, 5 is a waterproof device, 6 is a cover, and 7 is a shaft bearing.

Claims (1)

[Scope of utility model registration request] A drive shaft 20 extending from a drive shaft case 19 is interlocked and connected through a waterproof universal joint 23 into an axle case 14 that pivotally supports the front wheel 9, and an upper beam is connected from the upper end and inner center of the axle case 14, respectively. 18 and the lower beam 1 extend inward, while the upper shaft bearing part 21 and the lower shaft bearing part 2 extend in a bifurcated shape so as to sandwich the waterproof universal joint 23 from the upper and lower outer ends of the drive shaft case 19. The upper shaft bearing part 21 is located below the upper beam 18, the lower shaft bearing part 2 is located above the lower beam 1, and the upper king pin 22 is inserted through the upper beam 18 to The knuckle arm 24 is fixed to the upper end of the upper kingpin 22, and the lower end is loosely fitted into the metal 25 that is fitted into the upper kingpin 21. An O-ring 26 is installed between the metal 25 and the metal 25. The lower king pin 3 is passed through the lower beam 1 and installed into the lower shaft bearing 2, the lower end of the lower king pin 3 is fixed to the lower surface of the lower beam 1, and the lower king pin 3 is attached to the upper and lower ends of the O
Attach the ring 29, fit the thrust bearing 4 to the lower king pin 3 between the lower beam 1 and the lower shaft bearing part 2, and then remove the waterproof device 5.
is provided along the outer periphery of the thrust bearing 4, and the axle case 14 and the drive shaft case 19 are rotatably supported concentrically by the upper and lower king pins 22.3. A protection member for protecting the thrust bearing, waterproof gear, etc. in an open type front wheel support device of an agricultural vehicle from muddy water, etc., and the protection member consists of a bearing 7 and a cylindrical cover 6 integrally formed therewith. The shaft bearing 7 is press-fitted into the lower shaft bearing part 2 and is fixedly fitted in a non-rotatable manner, and the shaft bearing 7 is installed and used so that its inner surface and the outer surface of the lower king pin 3 rotate and slide. In addition, the cover 6 is provided with a notch of an appropriate shape on the inside thereof, and the notch covers the thrust bearing 4 and the waterproof device 5, and the space between the lower beam 1 and the lower shaft bearing 2 is A protection member for protecting a thrust bearing, etc. in an open front wheel support device of a four-wheel drive agricultural vehicle from muddy water, etc., characterized in that it is installed and used in a four-wheel drive agricultural vehicle.