JPS5832962Y2 - Tail wheel structure for agricultural tractors, etc. - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a tail wheel structure for use on agricultural tractors, etc.

In other words, the tail wheels of agricultural tractors, power tillers, etc.
In addition to forming symmetrical foils that are easy to manufacture, it is possible to cover the seal cover of the bearing part with a dust cover to create an even safer bearing structure, and even without removing both foils, only the dust cover can be used. The seal cover is provided with a simple and robust structure so that the seal cover can be conveniently replaced by removing it.

The embodiments shown in the drawings will be described below.

Reference numeral 1 denotes a tail wheel support installed vertically on the rear side of the tilling part of an agricultural tractor or power tiller.The end of the horizontal support shaft 2 is inserted into the lower hole 7 of the support 1, and the end of the support shaft 2 is inserted into the lower hole 7 of the support 1. Threaded part 2
' and fix it by screwing the nut 8 on.

A indicates a boss, and a ring-shaped flange 5 is formed on the outer periphery near the opening 9 at one end of the boss A, and a rubber bowl-shaped seal cap 4 can be removably tightly fitted into the opening 9. Then, insert the support shaft 2 inward from the hole of the boss A on the opposite side.
The bearing 3 is inserted between the support shaft 2 and the inside of the boss A.
, 3, and an oil seal 10 is fitted to the dead end of the boss A.
A bowl-shaped cover 11 is inserted between that part and the support 1, and the end of the boss A is covered with the cover 11.

B indicates a tail wheel, and the tail wheel B has a structure in which left and right symmetrical press-drawn foils b1 and b2 are joined together, and a disk portion 12 is formed in the center of both foils b1 and b2. , 12' can be joined, and
The disk portions 12 and 12' are constructed so that the holes formed in the disk portions 12 and 12' can be inserted into the boss A from the opening 9 side and joined to the flange portion 5.

Further, C is a dust cover formed in a dish shape, and the peripheral plate portion 13 of the dust cover C is joined to the outer surface of the outer disk portion 12, and in this state, the end of the boss A and the seal cap 4 The bolts 6 are inserted into the holes 14 of the plate portion 13 and the holes 15 of the disk portions 12 and 12'.
It is constructed so that it can be inserted into the hole 16 of the collar 5 and screwed onto a nut 6' with a washer 17.

Therefore, the tail wheel B has both wheels b1 that can be manufactured identically.
, b2 can be arranged in any number of ways.

Also, both the joined foils b1. Disk portion 12 of b2.
12' is fitted into the boss A and joined to the flange part 5, the peripheral plate part 13 of the dust cover that can cover the end of the boss A and the seal cap 4 is joined to the outer surface of the disk part 12, and the bolt 6 is inserted. It can be assembled by screwing and tightening the nut 6'.

If the seal cap 4 ages and malfunctions such as oil leakage occur, simply remove the bolts 6 and nuts 6' and remove the dust cover C, and remove the seal cap 4 without removing both foils b1 and b2. can be exchanged.

In this way, in the present invention, the support shaft 2 supported by the tail wheel support 1 is fitted and inserted through the boss AK bearing 3, etc., and the seal cap 4 is attached to the end of the boss A. A symmetrical foil b1 forming the tail wheel B is attached to the flange 5 formed on the outer periphery of the b1. At the same time, a dust cover C that can cover the seal cap 4 is attached to both foils b.
1, both foils b1. b2
The tail wheel can be easily formed by joining together two wheels of the same shape, and since both wheels are of the same shape, it can be mass-produced at low cost, and the seal of the bearing part can be easily formed. An even safer bearing structure can be achieved by covering the cover with a dust cover, and when the seal cover has aged and needs to be replaced, it can be easily done by simply removing the dust cover without having to remove both foils. ,
Furthermore, the dust cover is fastened using the bolts that secure both wheels, so no special fixing means is required, and when the dust cover is removed, both foils are supported by the flange of the boss. Both wheels can be removed without coming off the support shaft, the dust cover can be easily installed and removed, and the dust cover is bolted to the boss flange together with both wheels, so it can be easily removed in the field. It does not come off even if it comes into contact with a stump or clod of earth, can reliably protect the seal cap, and has the characteristics of being able to provide a simple and robust structure as a whole.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of the main part.
Figure 2 is an enlarged view of a part of it. 1... Tail wheel support, 2... Support shaft, A
...Boss, 3...Bearing, 4...
...Seal cap, 5...Brim, B...
...tail wheel, bl, b2 ... foil, 6.
·····bolt.

Claims (1)

[Scope of utility model registration request] A flange is formed on the outer periphery of the boss A by fitting the support shaft 2 supported by the tail wheel support 1 into the boss A with a bearing 3 interposed therebetween, and covering the end of the boss A with a seal cap 4. The portion 5 includes a left-right symmetrical foil b1 forming the tail wheel B. b2 are joined together and a dust cover C capable of covering the seal cap 4 is attached to both foils bl, and both foils b1. Tail wheel structure that can be attached to agricultural tractors etc. by tightening with bolt 6 along with b2.