Guide wheel with roller bearings

Abstract

The present invention relates to a shaft (2) featuring a decentralised circular limiter (3) on one side (L1) and, on the opposite side (L2), a threading (R) designed to insert bearings (10) on the shaft (2). The first bearing (10) is inserted from the side (L2) of the shaft (2) and positioned against the decentralised circular limiter (3), wherein the shaft is inserted into the central hub (12) of the guide wheel (1), and from the same side (L2), a second bearing (10) is fitted and fastened with a self-locking nut (11) threaded onto the shaft (2) wherein said bearing is inserted into the threading (R) of the shaft (2). Finally, the overall fastening of the shaft (2) and bearings (10) in the guide wheel (1) is completed by affixing a flange (13) with threaded holes (FR), aligned with the threaded holes (FR) of the central hub (12), to which it is screwed in place.

Description

BEARING GUIDE WHEEL BRIEF SUMMARY OF THE INVENTION

[0001] This patent application concerns a bearing-bearing idler wheel used in sugarcane harvesters. The invention is for the idler wheel to contain bearings along with other complementary elements. The bearing-bearing invention aims to increase the lifespan and resistance of the idler wheel, and especially to prevent overheating, which often leads to a start or even a fire. OF THE CURRENT STATE OF THE TECHNIQUE

[0002] In the current state of the art, the idler wheel consists essentially of a shaft with a centralized circular stop, with each side of the shaft inserted by a pair of bushings that are coupled to a hub and driven to the center of the shaft. The shaft is also complemented by sealing rings (sealing flanges), as the oil is filled between the wheel and the shaft. Finally, the center of the shaft is inserted into the idler wheel, and the shaft ends are fixed to the bearings of various equipment brands. OF THE PROBLEMS IDENTIFIED IN THE STATE OF THE TECHNIQUE

[0003] The main problem that occurs in the guide wheel of sugarcane harvesters is that the guide wheel with bushing overheats.

[0004] What causes the guide wheel to catch fire is the heating of the bushings, due to rapid and abrupt repetitive movements (sharp turns in the planting row), which quickly wears the bushings and causes them to overheat. Other factors include climate change, such as high temperatures, especially in summer, the guide wheel, and the soil. These factors, combined, cause the bushings to overheat.

[0005] In the case of harvesters, other factors also cause the idler wheel to overheat. For example, when a sugarcane plantation is experiencing low production during the harvest, the harvester needs to increase its maximum speed to reduce costs. Increasing the speed overheats the bushings, even though they are bronze. It's important to note that the bushings are made of bronze, which Even though they are resistant to stress and overheating, they are easily damaged when installed in a sugarcane harvester. It's worth noting that bushings have recently been mixed with other minerals to reduce costs. This further reduces quality, such as strength, and service life. In other words, instead of creating positive solutions, manufacturers are creating cost-effective solutions that are ultimately detrimental. STATE OF THE ART PATENT DOCUMENTS

[0006] In searches carried out on patent document search sites, no axle with bearing for the guide wheel of sugarcane harvester implements was found, however, a document below is provided as a reference, which describes an axle with bearing for automotive wheels, but without any similarity to that proposed in this patent application.

[0007] Document MU 6902691 - GUIDE WHEEL ASSEMBLY FOR TERRACERS", of the type used for the construction of medium or wide base terraces, consisting of two sections of discs pivoted to a central structure, which will be coupled to the tractor, said assembly comprising a special base (02) fixed to the rear and internal end of the disc-carrying chassis (01), and articulatedly receiving a support arm (04) through screws (03), said arm having at its lower end means for receiving a hub with bearings, a rim (10) and a flat disc (09).

[0008] Further searches were conducted on patent document search engines using new keywords and category classifications, and no other documents relevant to the patent application were found. OF THE PROPOSED INVENTION

[0009] The invention, as already described in the "BRIEF SUMMARY" section, concerns a guide wheel axle for a sugarcane harvester, different from current axles. The axle proposed in this patent application is composed of bearings and no longer by the presence of bushings. In order for the bearings to be inserted into the axle, said axle was designed with unique construction forms, which differ from the axles currently in the state of the art.

[0010] The use of bearings on the idler shaft provides resistance, especially to sharp turns made by the sugarcane harvester in the planting line. Another factor is resistance to overheating; in other words, bearings prevent the idler shaft assembly from overheating, compared to a bushing.

[0011] Regarding heating, it's important to remember that the idler wheel consists of an axle, bushings, hubs, and oil. Various factors, such as material composition, climate, and mechanical factors, can cause the axle and, especially, the bushings to heat up. In the presence of oil, this causes combustion, resulting in a fire in the idler wheel. Other factors also occur, such as bushing heating, which causes the material to become distempered and thus wears the bushings quickly. Bushing failure is also common, related to the factors described in this paragraph.

[0012] Returning to the invention of the bearing axle, another factor that provides an advantage is that the sugarcane harvester can be at maximum speed, above 5 km / h harvesting, without the guide wheel heating up, preventing it from catching fire.

[0013] The details of the bearing shaft will be described in the “TECHNICAL DESCRIPTION” topic. OF THE ILLUSTRATIONS THAT COMPOSE THE INVENTION

[0014] The following is a list of attached figures for a better understanding of the proposed patent application:

[0015] FIGURE 1: Exploded view of the conventional shaft;

[0016] FIGURE 2: Exploded view of the bearing shaft, object of the invention with the variation of the bearing in the manufacturing model of the “John Deere” brand;

[0017] FIGURE 3: Exploded view of the bearing shaft, object of the invention with the variation of the bearing in the manufacturing model of the “CASE” brand;

[0018] FIGURE 4: Perspective view of the bearing shaft, object of the invention;

[0019] FIGURE 5: Longitudinal sectional view of the bearing shaft, object of the invention;

[0020] FIGURE 6: Perspective view of the shaft, in the first stage of placing the first bearing on the shaft;

[0021] FIGURE 7: Perspective view of the shaft, with the first bearing already inserted on the shaft;

[0022] FIGURE 8: Perspective view of the shaft, with the guide wheel inserted on the shaft (the guide wheel can be inserted on the shaft, before or after the first pulley on the shaft);

[0023] FIGURE 9: Perspective view of the guide wheel inserted on the shaft, receiving the introduction of the second bearing;

[0024] FIGURE 10: Perspective view of the guide wheel inserted on the shaft, coupled by the second bearing, ready to be inserted by the self-locking nut;

[0025] FIGURE 11: Perspective view of the guide wheel inserted on the shaft, inserted by the self-locking nut and ready for the flange to be inserted;

[0026] FIGURE 12: Perspective view of the guide wheel inserted on the shaft with the flange inserted;

[0027] FIGURE 13: Perspective view of the guide wheel inserted on the shaft with the inserted flange prepared to be received by the sealing ring and retainer;

[0028] FIGURE 14: Perspective view of the guide wheel inserted on the shaft with the flange inserted by the bearing;

[0029] FIGURE 15: Perspective view of the bearing shaft, object of the invention, compared with the conventional shaft;

[0030] FIGURE 16: Perspective view of the bearing, self-locking nut and flange that are the subject of the invention in comparison with the bushing and hub of the conventional model;

[0031] FIGURE 17: Perspective view of the shaft, bearing, self-locking nut and flange, object of the invention in comparison with the shaft, bushing and hub of the conventional model; TECHNICAL DESCRIPTION OF THE CURRENT STATE OF THE TECHNIQUE AND THE PROPOSED PROJECT

[0032] Before beginning the technical description of this patent application, it is necessary to describe the state of the art, based on the attached figure 1. a) Description of the guide wheel of the state of the art:

[0033] The guide wheel (T) consists of an axle (2'), which is centrally equipped with a limiter or circular stop (3'). At the ends of the axle (2') are composed on each side of the axle, of perimeter channels (4') for accommodating sealing rings (5'), finally, close to the perimeter channels (4'), notches are present (6'). The shaft will be introduced inside a bearing (7') and fixed by pins (8') that will be introduced in the hole (9') of the bearing (7') that stops until the notch (6').

[0034] To complete the axle (2'), a pair of bushings (10') will be introduced on each side, which are pressed inside the hubs (11') and will then be inserted inside the central hub (12') of the guide wheel (T). The central hub (12') is composed of threaded holes (FR') that are distributed around the perimeter, these threaded holes are aligned with the threaded holes of the hubs (11') so that the fixing can be done, but before this fixing of the hubs (1 T) in the central hub (12') the lubricating oil is introduced.

[0035] Finally, between the bushing (10') and hub (11”), a flange is inserted with the aforementioned sealing rings (5') at the end of the shaft (2'), which will fit inside the bearing (7') together with a retainer (13') known in the market as “duo cone”.

[0036] It is important to note that the understanding described in the previous paragraph of the elements that make up the prior art may include construction variations in the axle or hub. However, it does not introduce new elements introduced in the description of the previous paragraph—that is, new elements, only minor changes in configurations that are irrelevant to new descriptions of prior art models here in this patent application report. Based on the understanding of the prior art idler wheel, the bearing idler wheel, the subject of this patent application, will be described below. b) Description of the idler wheel in the patent application:

[0037] The present patent application is composed of the guide wheel (1), in which an axle (2) is composed, with a decentralized circular limiter (3) for side (L1), and on the opposite side, side (L2) is composed of thread (R).

[0038] At the ends of the shaft (2) there are perimeter channels (4) for accommodating sealing rings (5), and near the ends of the shaft (2), that is, each side of the shaft (2) is present by notches (6), which will be introduced internally into the bearings (7) and fixed by means of pins (8) passing through the hole (9) of the bearing (7) until touching the notches (6). In the case of the shaft (2) the notches (6), perimeter channels (4) and the sealing rings (5) are the same as the conventional ones, while the bearings (7), pins (8) and the slots (9) are also similar to the conventional ones.

[0039] The central part of the shaft (2) is equipped with a sectioning (S) of the shaft (2), that is, a recess, which consists of a transverse hole (FT) that is connected to the longitudinal hole (FL) of the shaft (2) (the longitudinal hole (FL) that exits to the face of the shaft end (2)). The sectioning (S) as mentioned is a recess to increase the filling area and the oil volume.

[0040] The shaft (2) is inserted by two bearings (10) that are necessarily inserted by the side (L2) of the shaft (2), where the first bearing (10) touches the decentralized circular limiter (3). The second bearing (10) is inserted and remains parked after passing the thread (R). The second bearing (10) will be adjusted and limited by a self-locking nut (11) that is inserted in the thread (R) of the shaft (2). The self-locking nut (11) has a slot (FE) that covers 1 / 3 of the external area of ​​said self-locking nut (11). It is reinforced that no guide wheel uses a self-locking nut (11) and the other elements mentioned in the previous paragraphs.

[0041] The shaft (2) already installed with the bearings (10) and other elements such as the self-locking nut (11) is inserted into the central hub (12), guide wheel (1) and thus prepared for fixing the shaft (2) to the guide wheel (1).

[0042] In the case of the central hub (12), its perimeter is composed of threaded holes (FR) in accordance with the state of the art.

[0043] The axle (2) is fixed to the guide wheel (1) by means of a pair of flanges (13) inserted on each side of the axle (2). The flanges (13) consist of threaded holes (FR) aligned with the central hub (12) of the guide wheel (1). In this way, the flange is fixed by means of nuts (P) to the central hub (12).

[0044] Finally, the ends of the shaft (2) are fitted with retainers (14) and are inserted into the bearing (7) by the pin (8) and screw inserted into the threaded transverse hole (FT) of the shaft (2), these aspects already being done in the state of the art.

[0045] The bearings (10) are manufactured and sold with a standardized internal diameter; in this case, the proposed shaft (2) had its diameter increased, and consequently, the shaft resistance increased. Another optional fact was increasing the internal diameter of the central hub (12) of the guide wheel, thus increasing the volume of lubricating oil to be injected into this internal diameter, which prevents the temperature in the guide wheel (1) from increasing.

Claims

CLAIMS 1) BEARING GUIDE WHEEL, is equipped with a guide wheel (1) that has a central hub (12) equipped with perimeter holes, the guide wheel is also complemented by an axle (2) equipped with channels (4) and sealing rings (5), equipped with notches (6), which are responsible for fixing it to the bearing (7), by means of a pin (8) passing through the hole (9) contained in said bearing (7);the shaft (2), is characterized by a decentralized circular limiter (3) for side (L1), and on the opposite side, side (L2) is composed of thread (R) and in the central part of the shaft (2) is provided with sectioning (S), that is, in a recess that consists of a transverse hole (FT) that is communicating with the longitudinal hole (FL) in the face of the shaft (2), which is also inserted by two bearings (10) that are mandatorily inserted by side (L2) where the first bearing (10) touches the decentralized circular limiter (3) and the second bearing (10) inserted is parked after the passage of the thread (R) in which it is inserted by a self-locking nut (11) containing a slot (FE) that is inserted in the thread (R) of the shaft (2) which finally are inserted the flanges (13) consisting of threaded holes (FR) aligned with the central hub (12).; 2) BEARING GUIDE WHEEL, according to claim 1, is characterized in that the shaft (2) is made up of two bearings that must be inserted on the side (L2) of the shaft (2). 3) BEARING GUIDE WHEEL, according to claim 1, is characterized in that the shaft (2) has a decentralized circular limiter (3) to the side (L1) so that the first bearing rests on this decentralized circular limiter (3). 4) BEARING GUIDE WHEEL, according to claim 1, is characterized in that the shaft (2) contains on the side (L) a thread (R) for receiving a self-locking nut (11) containing a slot (FE) that covers 1 / 3 of the external area of ​​said self-locking nut (11). 5) BEARING GUIDE WHEEL, according to claim 1, is characterized in that the shaft (2) is provided with sectioning (S), that is, recessed, enlarging the area between the central hub (12) and the shaft, so that the volume of oil in which the said oil is injected into the longitudinal hole (FL) communicating with the transverse hole (FT) in the section (S) of the shaft face (2). 6) BEARING GUIDE WHEEL, according to claim 1, is characterized in that the central hub (12) has a diameter of 110 mm.

Images