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BR-102023000127-B1 - Monoblock universal axle rim

BR102023000127B1BR 102023000127 B1BR102023000127 B1BR 102023000127B1BR-102023000127-B1

Abstract

MONOBLOCK UNIVERSAL AXLE RIM. The invention belongs to the wheel and caster sector and refers to a rim that is injection molded in a single piece, with axle change accessories injected around the center or on the outside of the rim in a single injection. Each injection produces, in addition to the rim and axle change accessories, spacers and any locking devices, caps, or finishes. For solid or flexible solid tires, the monoblock model can be used, but for some models a split rim is used based on the same injection solution for the accessories in the rim, which can be injected in the same mold, even without being welded and connected to the rim.

Inventors

  • ALEXANDRE SANTOS TUROZI

Assignees

  • FB PNEU LTDA

Dates

Publication Date
20260317
Application Date
20230104

Claims (13)

  1. 1- A rim, made of injected thermoplastic polymer with a one-piece universal axle, characterized by having 6 internal spaces for customizing axle change accessories, fixed by injection channels (CIE) and detachable, where 2 spacers (E2E), 2 3/4" axles (E1) and 2 1/2" axles (E3) are located, all injected around the center of the wheel, having 1 to 10 injection channels (CIE), but preferably 1 to 3 injection channels (CIE); and providing accessories injected on the outside (AIEXT) around the rim, in the same injection; also having a recess (DE) for fitting and stopping the accessories (E1)(E3); ribs (NR) that are concentrated on the edges; axle (EP) inserted in the insert (PO) with double wall (PD); and central injection channel (CI) and internal accessory injection channels (CIE) controlled by locking devices (T); it can be injected in thermoplastic polymers such as polypropylene and polyamide with 0.1 to 50% glass fiber, adding 0.1 to 30% graphene.
  2. 2- A rim, according to claim 1, and characterized in that the spacer (E2E), or the accessories (E1) and (E3) are fitted to a single side of the rim, having a length that passes through the entire region (EP); and in that they are fixed by pressure, but can be clipped, threaded or fixed by screws on the axle.
  3. 3- A RING, according to claim 1, and characterized in that the shaft (EP) is double-walled (PD), as well as a ball and cylinder bearing shaft (BRP) or roller bearing shaft (ROLR); or in that it is a central shaft (ECR) and region (ECR2), with locks (TR) or double locks (TRD); or a roller bearing (ROLR1) secured with screws and metal washers or plugs (AR1), and the shaft (EP) has dimensions of 1", 3/4" or 1/2" or other varied dimensions.
  4. 4- ARO, according to claim 1, and characterized by having clipping locks (TR) on one or both sides; being from 1 to 30 locks (TR).
  5. 5- ARO, according to claim 1, and characterized by the accessories (E1)(E3) being able to be used inside bearings, the accessories being made only of plastic or with metal reinforcement in the inner, outer or inner and outer region of the accessory shaft.
  6. 6- ARO, according to claim 1, and characterized by the accessories (E1)(E2E)(E3) being able to be applied to plastic wheels of any size, mainly to industrial wheels and casters with a rim made of polyamide, polypropylene (PP), and a wheel made of polyurethane (PU), polyvinyl chloride (PVC), polypropylene (PP), SBR, ground and vulcanized SBR, expanded PVC, modifying the regions (EM)(2)(3) to receive a solid tire or a flexible or pneumatic tire.
  7. 7- A rim, according to claim 1, and characterized by the injection channels (CIE) and spacers (E2E) being detachable, being in two separate pieces or just one piece, and being cut to the correct size; or having the outer region textured with ruler markings of 5mm, 10mm, up to 50mm or up to the required size.
  8. 8- ARO, according to claim 1, and characterized by the fittings of the axle change accessories when injected, arranged externally and connected to the edge (3) in the outer region (AIEXT) that surrounds the entire surface of the wheel, having an injection channel (IEXT) capable of receiving from 1 to 50 accessories in the entire region (AIEXT) or in part thereof; and having locking devices (T) in the injection channel (IEXT).
  9. 9- ARO, according to claim 1, and characterized by the shafts (E1)(E3) being able to have locking devices such as (ROCL) which shows a recess that can be made in the accessory and in the recess (DE) a high relief in the total diameter or small regions with high relief, and also, it can be a female thread when in the recess (DE) there is a male thread; as a low relief (E1RO) which can be a locking region when in the plastic shaft (EP) there is a high relief; a locking region (E1T) with 1 to 6 pins (PIN), in which the locking region (E1T) can be injected in the center when it has 2, 3 or 4 connecting ribs from the plastic shaft (EP) to the region (EM) instead of 6 ribs; as a clip-on fitting (E3CLI) which when fitted to the shaft locks mechanically with a male pin (CLI) when in the recess (DE) there is a female pin; as a part (E3PA) that may have 1 or more screws for fastening, where one or more sides has a region (PAR) with a waiting hole for a screw on the shaft (EP); as by pressure in forced fitting with the use of a tool in a locking region (DEE) and a region (CHE) that is a chamfer or invitation for fixing the recess (DE); wherein along the locking region (DEE) there may also be small raised reliefs, as well as along the entire part there may be small raised reliefs; for having ribs (ALM) and having a locking region (DEE); and also, the region (DEE) may have a thread, and when the recess (DE) also has a thread, the fitting is by threading.
  10. 10- ARO, according to claim 1, and characterized by being able to have shaft change accessories of inch and millimeter standard, the inch standard fixed in the center and the millimeter standard in the region (AIEXT), allowing various spacers to be injected with different sizes; it being possible that close inch and millimeter shaft sizes with a difference of less than 3mm can share the same shaft change accessory, which can be injected both internally and externally.
  11. 11- A RING, according to claim 1, and characterized by the accessories being able to receive a hook (GN) that holds the accessories that are arranged externally around the ring located inside a package (EG); and also, the 3/4" accessory having a cradle (BR1) that allows the fitting of the 1/2" accessory, so that the cradle (BR3) is juxtaposed to the cradle (BR1); the package (EG) having cutouts for the hooks (GN) and a window (JN).
  12. 12- A ring, according to claims 1 and 3, and characterized by being able to use a plastic or metal ring to fix roller, ball and cylinder bearings with screws, having a region (ROLR1) where the bearing is placed and a plastic region (BAR) that is injected together with the ring to make the stop on the opposite side for the bearing that receives a washer (AR1) that is affixed by means of self-tapping screws (PA1) inserted in the equidistant regions (RO1).
  13. 13- ARO, according to claims 1, 6 and 13, and characterized by having a tread (BR), injected in a single piece, applied to concrete mixers and other casters; it is also possible to add a third accessory, where the larger axle accessory would be 2”, allowing the axle to be changed from 2” to 1” and then from 3/4” and 1/2” with the other accessories.

Description

Technological sector of invention [01] The present invention belongs to the wheel and caster sector and refers, more specifically, to a one-piece universal axle rim that is capable of adapting to a wide variety of wheelbarrow axles, wheelchair wheels, and other wheels and casters. The rim is injection molded in a single piece, and the axles are injection molded in the center or on the outside of the rim, in the same injection. Thus, each injection produces, in addition to the rim, the axle change accessories, spacers and any locking devices, caps or finishes. State of the art [02] A wheelbarrow is a small, human-powered tipper used to transport weights, usually earth or sand, in construction. Also used on farms or in gardens, the wheelbarrow facilitates the movement of loads that may be heavy or simply cumbersome. It consists of one wheel and two handles, and the center of gravity is near the wheel. [03] It is worth highlighting that not only in Brazil, but in several other countries, the axle of wheelbarrows, wheelchairs and various other similar vehicles that use wheels and casters is not standardized. Therefore, a consumer may buy a cart, but when they need to change the wheel or tire they cannot always find the wheel with the correct axle from the cart manufacturer. [04] When a consumer buys a wheelbarrow, they are looking for a transport vehicle to assist in their daily work. Since it is very common for wheelbarrow tires to puncture, some construction professionals are more familiar with and knowledgeable about the different axle dimensions, for example 1", 3/4" or 1/2"; in the European model, 25mm, 17mm and 13mm are used. The average user is not so familiar with this information, therefore, when needing to replace a wheel or tire, being able to find a universal rim provides more security to the user, knowing that it will fit 70 to 100% of wheelbarrows on the market, depending on the country where it is sold. This concept already exists and is on the market, but it is not applied to rims with bearings, and it is not injection molded in a single block. [05] A study was conducted to verify the state of the art, and it was concluded that the patent literature contributes little to solutions for promoting universal axles for rims with bearings. Only documents anticipating the use of accessories (bushings) to reinforce the wheel structure and assist in axle fixation were found. In US20040135333, US20040041462 and BR202014001166-3 it is clear that the bushings do not have the function of allowing the use of axles of different diameters, they only assist in axle adjustment, reinforce the structure and assist in bearing lubrication. The installation of the bushings is done by pressure or fittings, allowing easy replacement of the bushing when necessary. The bushings can be made of metallic material as in US20040135333, or of plastic as shown by US20040041462 and BR202014001166-3. New features and objectives of the invention [06] In this context, the one-piece injected universal axle rim is presented, where accessory parts for adjusting the wheel axle diameter are injected into the rim itself, in a single injection process. [07] This feature ensures a reduction in the cost of manufacturing the rim, therefore a lower energy consumption for its manufacture, also eliminating the need for other materials in the rim packaging to store the accessory kit, thus making it a more sustainable product, in addition to being able to bring the benefit to the consumer at a lower cost. [08] The purpose of the invention is to change the diameter of the axle simply by removing the desired accessory that is fixed to the rim itself (with the aid of cutting tools or by hand) and fitting it onto the rim axle (by clipping, pressing, forced fitting - using a hammer, hammering the accessories onto the axle, threading or other form of fitting). [09] In forced and press-fit fittings, axle change fittings may have a slight positive angle, and the wheel axle may have a negative angle, thus allowing for a more robust fixation, preventing the fitting from slipping or coming off the axle in a turn or after receiving a stronger impact. [10] Negative angle in injection is when a negative angle is intentionally placed in the direction of extraction, and by means of floating plates, slides or collapsible jaws it is possible to extract the part from the mold, and in this case ensure a more secure fit of the accessory on the axis. [11] In addition to the plastic axle, the one-piece universal axle rim also allows for the fitting of ball bearings, cylinders or roller bearings into the rim. The bearings are preferably fitted into the rim by clipping, but they can be screwed in with the aid of a metal or plastic plug, as well as adapting other known fitting solutions. [12] The one-piece universal axle rim has a system for changing inserts in the mold that allows the product to be manufactured with a plastic axle (in various diameters, for example: 1’’,