FI63692C - ARRANGEMANG VID HJULPAR TILL EN TRAKTOR ELLER MOTSVARANDE ARBETSMASKIN - Google Patents

Description

1 63692 Arrangement in a pair of wheels of a tractor or similar implement

The invention relates to an arrangement in a pair of wheels of a tractor or similar implement, in which the outer auxiliary wheel is fastened to the inner wheel in parallel by means of a clamping member, the edge of the auxiliary wheel rim facing the inner wheel extending into an outwardly projecting circular flange. Such structures are common and use is becoming more common. Advantages include better load-bearing capacity, lower surface pressure, less soil compaction and less slip. The main drawback has been the high cost of the attachments, the difficult, large-scale manufacturing methods, which also require a large variety of loose and moving parts, all of which prevent the auxiliary wheel from being serviced and the bolts being fixed with conventional wrenches.

One known structure is explained e.g. in a previous FI patent publication 49692 of the same applicant. The disadvantage of this known structure is its relatively complex structure with several loose parts, whereby the manufacturing costs become high. Another disadvantage is the disadvantages caused by tightening. In this known structure, the tightening takes place parallel to the common axis of the rims, which has proved to be awkward in practice.

The object of the invention is to provide a simpler method of manufacturing and mounting an additional wheel which, due to its attachment, is suitable for wheels of all sizes, being independent of the differences in the distribution bolts used in different tractor makes and rim types.

The tractor wheel set arrangement according to the invention is characterized in that the auxiliary wheel rim is made by forming a unitary blank and in that the auxiliary wheel rim and the inner wheel rim are each provided with at least one substantially circumferential locking wedge arranged about a relative axis of rotation of the rims. as a result of the rotational movement to press against each other and lock the rims together.

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The advantage of the additional wheel structure according to the invention compared to the previously known ones is a very simple and secure fastening and a cheap structure, because no expensive central crimping methods are required here, but the rim cylinder is completely empty inside except for one clamping screw. However, it is low against the spreading rim and thus does not interfere with the tightening of the tractor's own rim center bolts or their inspections and maintenance, as no additional fasteners need to be placed under them. The manufacture of the additional rim can also be easily automated kos-10 ka the manufacture of the rim itself does not use e.g. welding at all.

The invention will now be described, by way of example, with reference to the accompanying drawing, in which Figure 1 shows a partial vertical section of the rear wheel of a tractor and an additional ring arranged adjacent to it on the outside, Figure 2 shows wedged oblique surfaces and one tightening option.

Figure 1 shows a partial section of the actual rear tire 1 of the tractor 20 mounted on the rim 2. The rim has several lugs 3 with which the rear wheel is bolted to the hub plate in the normal way. The additional ring 4 is mounted on the additional rim 5. According to the invention, this additional rim is made, for example, of a cylindrical blank only by means of shaping. The additional rim is therefore completely uniform, there are no hit seams, etc.

The shaped auxiliary rim 5 is attached to the actual rear wheel of the tractor by means of at least one locking wedge 6, 7 in each rim and a conical surface of the corresponding rim. The tightening 30 can take place, for example, by rotating the additional rim 5 relative to the rim 2 about their common axis of rotation by means of a tightening screw, an eccentric crank latch or the like 8.

The wheel is removed by loosening the clamping screw 8, whereby the rim 5 can rotate relative to the rim 2, whereby the connection formed by the oblique surfaces of the locking wedges 6, 7 opens. The locking pin of the other end of the screw 8 can then be removed and the wheel turned out of place.

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The large wheels can also be locked by moving the tractor's own wheel with a sudden jerk, whereby the oblique surface of the locking wedge 7 of the rim 2 presses against the locking wedge 6 of the auxiliary rim 5 while jerking the auxiliary rim firmly against the actual rim 5. Em. The clamping screw 8 prevents the rim from rotating when the tractor is reversed.

When removing the wheel, loosen the clamping screw so that the locking pin of the clamping screw in its hole loosens and can be removed, after which the tractor wheel is abruptly jerked by reversing, so that place.

Claims (2)

63692 An arrangement on a pair of wheels of a tractor or similar implement, wherein the outer auxiliary wheel (4) is fixed to the inner wheel (1) in parallel, the edge of the auxiliary wheel (4) facing the inner wheel of the rim (5) extending into a circular flange projecting outwards from the tire. the rim (5) of the additional wheel (4) is made by shaping from a uniform blank and that the rim (5) of the additional wheel (4) and the rim (2) of the inner wheel (1) are each provided with at least one locking wedge (6, 7) substantially parallel to the rim circumference ), which are adapted to press against each other and lock the rims together as a result of the relative rotation of the rims about their common axis of rotation. Arrangement according to Claim 1, characterized in that the relative locking rotation of the rims (2, 5) is adapted to take place by means of a substantially circumferential tightening screw (8) or other corresponding rotational part attached to the locking wedges (6, 7). II