GB2089739A - Dual wheel assembly - Google Patents
Dual wheel assembly Download PDFInfo
- Publication number
- GB2089739A GB2089739A GB8136490A GB8136490A GB2089739A GB 2089739 A GB2089739 A GB 2089739A GB 8136490 A GB8136490 A GB 8136490A GB 8136490 A GB8136490 A GB 8136490A GB 2089739 A GB2089739 A GB 2089739A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rim
- wheel
- auxiliary
- tractor
- tightening
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B11/00—Units comprising multiple wheels arranged side by side; Wheels having more than one rim or capable of carrying more than one tyre
- B60B11/02—Units of separate wheels mounted for independent or coupled rotation
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Agricultural Machines (AREA)
- Tyre Moulding (AREA)
- Forging (AREA)
- Automatic Assembly (AREA)
Abstract
A dual wheel assembly for a tractor or a similar working machine comprises an outer auxiliary wheel (4) and an inner wheel (1), the rim (5) of the auxiliary wheel (4) being extended to form an axial flange provided with a locking wedge (6) arranged to cooperate with a wedge (7) on the rim (2) of the inner wheel to interlock the rims as a result of relative rotary motion of the rims around their common axis of rotation, means being provided to releasably secure the wedges in their locked position. The auxiliary rim (5) is made from a cylindrical blank. <IMAGE>
Description
SPECIFICATION
Wheel assembly for a tractor or similar working machine
The present invention relates to an arrangement in a pair of wheels of a tractor or a similar working machine wherein an outer auxiliary wheel is fastened by means of a clamping means in parallel to an inner wheel whereby the edge of the rim of said auxiliary wheel facing said inner wheel is extended to form a circular flange projecting outwardly from the tyre. Such constructions are common and are being used more and more widely. The advantages included an improved carrying capacity, a reduced surface pressure, a reduced soil compaction and less slippage.Drawbacks have primarily included the high price of the auxiliary equipment and awkward and laborious manufacturing methods which, in addition, require a large number of various loose and moving parts which all prevent, when the auxiliary wheel is installed, maintenance of the mountings of the tractor's own wheel system and tightening of the screws by means of conventional spanners.
One known construction is described, e.g., in the same applicant's earlier Finnish Patent Specification 49,692. This known construction suffers from the disadvantage of a relatively complicated construction including a plurality of loose parts, which increases the manufacturing costs. Another drawback comprises the disadvantages caused by tightening. In this known construction the tightening is effected parallel to the common axis of the rims which, in practice, has proved to be awkward.
The object of the present invention is to provide a simplified method for manufacturing and installing an auxiliary wheel which method, because of its mounting is suited for wheels of all sizes regardless of tightening bolt pitch differences used in various tractor marks and rim types.
An arrangement in a pair of wheels of a tractor according to the invention is characterized in that the rim of said auxiliary wheel is made by shaping of a continuous blank, and in that said rim of the auxiliary wheel and the rim of said inner wheel are each provided with at least one locking wedge substantially parallel to the periphery of the rim, said locking wedges being arranged to lean against each other and to interlock said rims as a result of the relatively rotary movement of the rims around their common axis of rotation.
An advantage of the auxiliary wheel assembly according to the invention over the prior art assembly lies is a simple and extremely reliable mounting and an inexpensive construction because it requires no expensive central crank tightening methods but the rim cylinder is completely empty on the inside with the exception of one tightening screw. However, it is low against the extended rim and, hence, does not interfere with the tightening of the tractor's own rim centre bolts nor with their check-ups and maintenance since no additional mountings are required thereunder. The manufacture of the auxiliary rim can also be easily automatized since, for example, no welding is used in the manufacture of the rim itself.
The invention will now be described by means of an embodiment with reference to the accompanying drawing in which
Figure 1 is a partial vertical section of a rear wheel of a tractor and an auxiliary tyre arranged adjacent thereto on the outer side, and
Figure 2 shows wedging inclined surfaces and one tightening alternative.
Figure 1 shows in partial section a tractor's rear tyre proper 1 mounted on a rim 2. The rim is provided with a plurality of lugs 3 by means of which the rear wheel is in a conventional manner removably fastened on a hub disc by means of bolts. An auxiliary tyre 4 is mounted on an auxiliary rim 5.
According to the invention, this auxiliary rim is made, for example, of a cylindrical blank by means of shaping only. Thus, the additional rim is completely unbroken without any welds or similar.
The shaped additional rim 5 is fastened on the tractor's rear wheel proper by means of at least one locking wedge 6,7 in each rim and by means of a conical surface of the counter-rim. Tightening is effected, for example, by rotating the additional rim 5 in relation to the rim 2 around their common axis of rotation by means of a tightening screw, a pawl of an eccentric crank or similar 8.
Removal of the wheel is effected by unscrewing the tightening screw 8 whereby the rim 5 is able to rotate relatively with respect to the rim due to which the connection formed by the inclined surfaces of the locking wedges 6,7 is opened. Hereafter a locking pin at one end of the screw 8 can be removed and the wheel swung out of its position.
Large wheels can also be locked by moving the tractor's own wheel with a sudden jerk whereby the inclined surface of the locking wedge 7 in the rim 2 abuts on the locking wedge 6 of the auxiliary rim 5 while at the same time pulling the additional rim tightly against the rim proper which produces a secure engagement. The rim is by means of said tightening screw prevented from unlocking when backing the tractor.
When removing the wheel, the tightening screw is unscrewed so as to loosen the locking pin of the tightening screw in its hole for removal thereof whereafterthetractorwheel is pulled by backing with a sudden jerk whereby the rim, while rotating, moves with respect to the additional rim so that the locking wedges are released from the position shown in Figure 2 whereby the auxiliary wheel can be swung out of its position.
1. Awheel assembly for a tractor or similar working machine comprising an outer auxiliary wheel fastened by means of a clamping means in parallel to an inner wheel the edge of the rim of said auxiliary wheel facing said inner wheel being extended to form a circular flange projecting outwardly from the tyre, wherein the rim of said auxiliary wheel is made by shaping from a continuous blank, and said rim and that of said inner wheel are each provided with at least one locking wedge substan
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (3)
1. Awheel assembly for a tractor or similar working machine comprising an outer auxiliary wheel fastened by means of a clamping means in parallel to an inner wheel the edge of the rim of said auxiliary wheel facing said inner wheel being extended to form a circular flange projecting outwardly from the tyre, wherein the rim of said auxiliary wheel is made by shaping from a continuous blank, and said rim and that of said inner wheel are each provided with at least one locking wedge substan tially parallel to the periphery of the rim, said locking wedges being arranged to engage against each other and to interlock said rims by means of relative rotary movement of the rims about their common axis of rotation.
2. An assembly according to claim 1, wherein said relative locking rotary movement of said rims is arranged to be effected by means of a tightening screw substantially parallel to the periphery of the rims and fastened to said locking wedges or by means of any other corresponding part producing a rotary movement.
3. Awheel assemblyforatractor or similar working machine substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI803971A FI63692C (en) | 1980-12-19 | 1980-12-19 | ARRANGEMANG VID HJULPAR TILL EN TRAKTOR ELLER MOTSVARANDE ARBETSMASKIN |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2089739A true GB2089739A (en) | 1982-06-30 |
GB2089739B GB2089739B (en) | 1985-04-11 |
Family
ID=8513998
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8136490A Expired GB2089739B (en) | 1980-12-19 | 1981-12-03 | Dual wheel assembly |
Country Status (8)
Country | Link |
---|---|
BR (1) | BR8108215A (en) |
DE (1) | DE3148701A1 (en) |
DK (1) | DK153817C (en) |
FI (1) | FI63692C (en) |
FR (1) | FR2496561B1 (en) |
GB (1) | GB2089739B (en) |
IT (1) | IT1144530B (en) |
SE (1) | SE440887B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102015118196A1 (en) * | 2015-10-26 | 2017-04-27 | Kock Und Sohn Räder Gmbh | Apparatus for releasably connecting an auxiliary wheel rim to a vehicle wheel rim and tie rod for use in the apparatus |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR440291A (en) * | 1911-04-12 | 1912-07-06 | Marc Wolff | Removable pneumatic tire with contractable cone rim, for automobile and vehicle wheels |
FR17661E (en) * | 1912-12-31 | 1913-10-27 | Jean Marie Laforet | Improvements made to wheels with pneumatic tires or other twin tires |
DK151694C (en) * | 1980-11-20 | 1988-06-06 | Ellegaard A S P | CLUTCH ARRANGEMENT FOR LOCKABLE COUPLING OF A VEHICLE ORIGINAL WHEEL WITH A OR MORE EXTRA WHEEL |
-
1980
- 1980-12-19 FI FI803971A patent/FI63692C/en not_active IP Right Cessation
-
1981
- 1981-12-03 GB GB8136490A patent/GB2089739B/en not_active Expired
- 1981-12-09 DE DE19813148701 patent/DE3148701A1/en not_active Withdrawn
- 1981-12-11 IT IT49889/81A patent/IT1144530B/en active
- 1981-12-15 DK DK556881A patent/DK153817C/en not_active IP Right Cessation
- 1981-12-16 SE SE8107552A patent/SE440887B/en not_active IP Right Cessation
- 1981-12-17 BR BR8108215A patent/BR8108215A/en unknown
- 1981-12-18 FR FR8123755A patent/FR2496561B1/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FI803971L (en) | 1982-06-20 |
IT8149889A0 (en) | 1981-12-11 |
DK153817B (en) | 1988-09-12 |
BR8108215A (en) | 1982-10-05 |
DK153817C (en) | 1989-03-06 |
FI63692B (en) | 1983-04-29 |
FR2496561B1 (en) | 1986-06-27 |
IT1144530B (en) | 1986-10-29 |
GB2089739B (en) | 1985-04-11 |
SE8107552L (en) | 1982-06-20 |
FR2496561A1 (en) | 1982-06-25 |
DK556881A (en) | 1982-06-20 |
SE440887B (en) | 1985-08-26 |
DE3148701A1 (en) | 1982-06-24 |
FI63692C (en) | 1983-08-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |