Shaft-hub assembly

Abstract

A split shaft with a setting adjustment, including a first part and a second part with threaded cylindrical sections, that may optionally also optionally include a sleeve to interconnect the first and second parts by threading. A shaft-hub unit, which includes the split shaft and a cylindrical hub with two couplable parts. Use of the split shaft and shaft-hub unit in cutting disks of planters and subsoilers, as well as in wheels of planters, is also described.

Claims

1. A shaft-hub assembly comprising: 1) a split shaft; the split shaft comprising: a first part, a second part, and a central sleeve of a cylindrical section, wherein the first part and the second part comprise grooves on their outer surfaces and the central sleeve comprises grooves on its inner surface, wherein a diameter of said first part and a diameter said second part of the shaft are equal, and a diameter of the cylindrical section of said sleeve is greater than the diameter of the said first part and said second part of the shaft; 2) a cylindrical hub comprising two couplable parts; 3) at least two tapered rollers; 4) at least two retainers that are configured to retain a lubricant grease; 5) at least two dust covers that are configured to block dust from entering an internal lubricated part of the hub; and 6) at least two rings or latches fitted at ends of the two parts of the hub to prevent escape of any internal parts, wherein said cylindrical hub further comprises a perforated section.

2. The shaft-hub assembly according to claim 1, wherein the parts of said hub are made of cast iron.

3. The shaft-hub assembly according to claim 1, wherein the two parts of the cylindrical hub are coupled by inserting screws in the perforated section of said hub.

Description

BRIEF DESCRIPTION OF DRAWINGS

(1) The structure and operation of the present invention, together with further advantages thereof may be better understood by reference to the accompanying drawings and the following descriptions:

(2) FIG. 1 illustrates a possible configuration for the split shaft of the present invention, wherein parts of said shaft are connected by means of a sleeve.

(3) FIG. 2 shows a side view of the cylindrical hub comprising two coupable parts.

(4) FIG. 3 shows a top view of the cylindrical hub comprising two coupable parts.

(5) FIG. 4 shows a schematic representation of the mounting of the shaft-hub assembly.

(6) FIG. 5 shows the constituent parts of the shaft-hub assembly.

(7) FIG. 6 shows a further view of the constituent parts of the shaft-hub assembly.

(8) FIG. 7 shows a further view of the constituent parts of the shaft-hub assembly.

(9) FIG. 8 is a cut away side view of the shaft-hub assembly.

DETAILED DESCRIPTION OF THE INVENTION

(10) Although the present invention may be susceptible to various embodiments, there are shown in the drawings and in the following detailed discussion, preferred embodiments with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the present invention to what is illustrated and described herein.

(11) The main approach of a first embodiment (not shown) of this invention relates to a split shaft with adjustment setting comprising a first part and a second part made of steel, wherein said first part comprises a cylindrical section whose inner surface comprises a plurality of grooves, and said second part comprises a cylindrical section whose outer surface comprises a plurality of grooves, so as to provide the threading of said first part to said second part of the shaft, and wherein the diameter of the cylindrical section of the first part is larger than the diameter of the cylindrical section of the second part of the shaft.

(12) In a second preferred embodiment of the present invention, a split shaft 1 with adjustment setting comprising a first part 11, a second part 12 and a central sleeve (3) of a cylindrical section, wherein the diameter D1 of the first part 11 and of the second part 12 comprises grooves 20 on their outer surfaces and the central sleeve (3) comprises groves 21 on its inner surface, wherein the diameter D1 of the cylindrical section of said first part 11 and second part 12 of the shaft 1 are equal, and the diameter D2 of the cylindrical section of said sleeve 3 is greater than the diameter of cylindrical section of said first part 11 and second part 12 of the shaft 1 so as to provide the threading of said first 11 and second parts 12 of the shaft 1 at each end of the sleeve 3.

(13) In a preferred embodiment of the present invention, there is provided a shaft-hub assembly comprising:

(14) 1) said split shaft 1 with adjustment setting comprising a first part 11 and a second part 12 made of steel;

(15) 2) a cylindrical hub 8 comprising two coupable parts, wherein said hub 8 comprises a central portion 22 of cylindrical section which extends axially to form an inner seat, wherein one of the parts are inserted and assembled to other internal parts that form the shaft-hub connection, and subsequently the other part 23 of the hub is used for fastening the cutting disk. The hub 8 further comprises a perforated section 10 which allows lubricant insertion across its whole inner surface, facilitating the rolling and minimizing wear. Hub parts are made of cast iron 24. The two parts of the cylindrical hub 8 are coupled by inserting from approximately six screws 9 around the perforations existing in both sides;

(16) 3) at least two tapered rollers 2;

(17) 4) at least two retainers 5 for retaining the lubricant grease, made of rubber;

(18) 5) at least two dust covers 4, made of felt and attached to a washer, which are used to block out dust in the lubricated inner part of the hub; and

(19) 6) at least two rings or latches 6, fitted at the ends on both sides of the hub, to prevent escape of any internal parts.

(20) Compared to the prior art, the main differences of the shaft-hub assembly of the present invention reside in the split shafts 1, which have adjustment setting, in the type of rollers 2 that are used and in the use of dust cover 4.

(21) By setting adjustment of the split shaft 1 of the present invention, the durability and strength of the product will be much higher, allowing the user to notice the gap that will eventually occur, and make the necessary adjustments, avoiding the rupture of the hub 8 and of the internal components, which would not be possible to make with the currently existing products on the market. The tapered rollers 2, also more resistant, are used to monitor and complement the durability of the product, since ball rollers do not meet the requirements for monitoring the progress brought by the invention. As the dust covers 4, these are extremely useful for inhibiting dust and other impurities in the lubricated part of the product, avoiding the wear caused by dryness originating from the dirt (dust), which also adds to its durability.

(22) The assembly of the entire assembly begins by inserting the covers 4 of the rollers 2 in the inner part of the both sides of the hub 8, fastening them by pressure to the point limited by a shoulder; then, the roller 2 should be placed in one of the sides of the shaft 1, fitting it under pressure to the existing limit; later, this side of the shaft 1, already with the fastened roller 2, must be threaded in the central sleeve 3 until it touches the taper roller 2; then it must be placed the other roller 2 of the second part 12 of the shaft 1, likewise, by pressure, to the existing limit; in sequence, the part of the shaft 1 must be inserted (with the roller 2 and the sleeve 3) on one of the sides of the hub 8, by placing then the other part of the shaft 1 (with the roller 2) by the other side of the hub 8, being threaded in the sleeve 3, which will make the setting and adjustment; continuing the mounting, the retainer 5, the dust covers 4 and rings/latches 6 should be placed on both sides of the hub 8, necessarily in this sequence. Then, the hub 8 is ready, with the use of its other part, for fastening of the cutting disk of planters and subsoilers, with the use of screws 7. At the end, after the complete mounting of the hub 8 in the cutting disk, all the assembly shall be fastened on the stand of the planter or subsoiler, using a long screw that crosses the whole assembly and is fastened by a nut.

(23) The setting is made by the split shaft 1, wherein in case of looseness in the rollers 2, causing an instability in the cutting disk, and consequently, in the whole assembly, the user can simply proceed with the adjustment/setting, returning the product stability, preventing its wear and increasing its durability.

(24) The possibility of setting and adjustment as well as the durability of the product, are the great advantages and the major difference of this product over those existing in the market, since the user will avoid constant ruptures due to the setting and strength of the equipment, reducing costs and optimizing time use of their implements, which need not to stand still for sequential exchanges.

(25) The application of the shaft-hub assembly can be made in cutting disks of any planters and/or subsoilers currently in the market. Additionally, the split shaft of the present invention can be used separately in wheels of planters.

(26) Thus, although only some embodiments of the invention have been shown, it will be understood that various omissions, substitutions and changes may be made by one skilled expert in the art without departing from the spirit and scope of the invention. The described embodiments are to be considered in all aspects only as illustrative and not restrictive.

(27) It is expressly intended that all combinations of the elements that perform the same function in substantially the same way to achieve the same results are within the scope of the invention. Substitute elements of a described embodiment to another are also fully intended and contemplated.

(28) It is also necessary to understand that the drawings are not necessarily to scale, but they are only conceptual nature. The intention is therefore to be limited as indicated by the scope of the appended claims.