System for connecting scooter hub motor wheels to chassis of scooters and bicycles

Abstract

A system for connecting an electric scooter hub motor wheel to the chassis of the scooter that includes the axle motor of the wheel, a fixing arm connected to the chassis, and an insert-sleeve. The insert-sleeve includes a body with a hole with a cross-sectional shape that corresponds to the cross-sectional shape of the axle. The cross-sectional shape of the body corresponds to the cross-sectional shape of a hole in the arm. The arm is made of a lightweight metal such as aluminum, and the insert-sleeve is made of a heavy metal such as steel. The cross-sectional shapes of the body and the hole in the arm are in a form of an elongated rectangle with at least two straight sides, and the cross-sectional shapes of the hole of the body and of the axle are in a form of an elongated rectangle with two circular short sides.

Description

[0001] System for connecting scooter hub motor wheels to chassis of scooters and bicycles Description

[0002] TECHNICAL FIELD

[0003] The present invention refers to a system for connecting an electric scooter hub motor wheel to a chassis of an electric scooter or an electric bicycle.

[0004] BACKGROUND ART

[0005] The side axle of electric scooter hub motor wheels is made of hard metal such as steel, because it has many loads and needs to be strong and durable. It is customary to fix this side axle to the chassis of the scooter with an arm, and this is so that the motor body turns and turns the wheel for the scooter to travel. The market demands light tools and therefore it is common to manufacture the chassis including this arm from aluminum. The cross section of the side axle is sort of rectangular with two short circular sides, both to achieve a large cross section integrated inside the arm (made of aluminum), and to allow screwing a nut on the end of the side axle that comes out of the other side of the arm. The problem is that the forces that the side axle exerts on the hole in the aluminum arm create wear of the hole in the arm, and the arms must be replaced frequently. The present invention comes to provide good solution to this problem.

[0006] SUMMARY OF THE INVENTION

[0007] The present invention refers to a system (10) for connecting a hub motor wheel (100) of an electric scooter or bicycle (300) to a chassis (200) of the electric scooter or bicycle (300). The system includes a side axle (11) configured to connect to the hub motor wheel (100), a fixing arm (12) having a first end (121) configured to connect to the side axle (11) and a second end (122) configured to connect to the chassis (200), and a load- spreading insert (13), comprising an insert part (131) with an insert longitudinal hole (132).

[0008] The cross-sectional shapes (133, 111) of the insert longitudinal hole (132) and the side axle (11) are identical, each formed as an elongated rectangle with two circular short sides, such that the insert longitudinal hole (132) is configured to receive the side axle (11). The cross-sectional shapes (134, 123) of the insert part (131) and a first arm longitudinal hole (124) in the first end (121) of the fixing arm (12) are identical, each formed as an elongated rectangle with at least two straight sides, such that the insert part (131) is configured to fit within the first arm longitudinal hole (124). The fixing arm (12) may be made of a lightweight metal, and the load- spreading insert (13) is made of a heavy metal. The system reduces wear on the fixing arm (12) by distributing the forces exerted by the side axle (11) over the straight surface area of the straight sides of the cross-sectional shapes (134, 123) of the insert part (131) and the first arm longitudinal hole (124). In other words, the rotational forces exerted by the side axle are blocked by utilizing the straight sides of the cross-sectional shapes of the insert part and the first arm longitudinal hole, which provide a counteracting push force against the rotational forces of the side axle.

[0009] DESCRIPTION OF THE DRAWINGS

[0010] The intention of the drawings attached to the application is not to limit the scope of the invention and its application. The drawings are intended only to illustrate the invention and they constitute only one of its many possible implementations.

[0011] FIGS 1 and 2 depict the load spreading insert (13).

[0012] FIGS 3 - 5 depict the fixing arm (12).

[0013] FIGS 6 - 7 depict the fixing arm (12) connected to the side axle (11). FIG. 8 depicts the side axle motor connected to the hub motor wheel. FIG. 9 depicts the fixing arm (12) ready to be connected to the side axle.

[0014] FIGS 10 - 11 depict the load spreading insert (13) when is about to be inserted into the longitudinal hole in the fixing arm (12).

[0015] FIGS 12 - 13 depict the load spreading insert (13) when is inserted into the longitudinal hole in the fixing arm (12).

[0016] FIG. 14 depicts the scooter (300) with its chassis (200).

[0017] THE INVENTION

[0018] The main object of the present invention is to provide a system (10) for connecting an electric scooter hub motor wheel (100) to a chassis (200) of an electric scooter or an electric bicycle (300). The system (10) includes the followings elements: (a) the side axle (11) of the electric scooter hub motor wheel; (b) a fixing arm (12) with a first end (121) that is designed to be connected to the side axle and with a second end (122) that is designed to be connected to the chassis; and (c) a load spreading insert (13). The term “scooter” in this disclosure and in the claims means and refers to electric scooters and / or electric bicycles. The problem described in the background applies also to electric bicycles.

[0019] The load spreading insert (13) comprises a body inserted part (131) with a longitudinal hole (132). The cross-sectional shape (133) of the longitudinal hole of the body inserted part corresponds to the cross-sectional shape (111) of the side axle. Such that the longitudinal hole of the load spreading insert is designed to receive the side axle. The cross-sectional shape (134) of the body inserted part corresponds to the cross-sectional shape (123) of a longitudinal hole (124) in the first end of the fixing arm. Such that the longitudinal hole of the fixing arm is designed to receive the body inserted part. The fixing arm is made of lightweight metal such as aluminum and the load spreading insert is made of heavy metal such as steel.

[0020] The cross-sectional shapes of the body inserted part and of the longitudinal hole in the fixing arm may be in a form of an elongated rectangle with at least two straight sides, and the cross-sectional shapes of the longitudinal hole of the body inserted part and of the side axle motor may be in a form of an elongated rectangle with two circular short sides.

[0021] The system (10) means that the forces acting by the side axle no longer act on a peripheral wall of a hole in the aluminum arm, but on the peripheral wall of the hole in the load spreading insert, which is made of steel (it is a small part in size, so the fact that it is made of steel does not make the scooter weigh excessively). The forces of the side axle act on the peripheral wall of the hole in the aluminum arm "mediated" by the load spreading insert, which spreads these forces over a larger surface area equal to the surface area of the peripheral wall of the load spreading insert. As a result, the wear of the aluminum arm hole is very low.

[0022] To ensure that the motor effectively rotates the wheel rather than the arm or chassis, we must not only distribute the force but also block it. This requires a counteracting mechanism provided by the arm. Specifically, the motor axle must be secured in such a way that the opposing faces (of the axle and the receiving hole) push directly against each other, thereby counteracting the motor's torque. This approach eliminates reliance on friction, especially since both the axle and the hole are round, which minimizes the effectiveness of friction for force blocking. By aligning the faces to press against each other, we achieve a stable, fixed point of resistance, enabling the motor's rotational force to be directed solely toward turning the wheel.

[0023] Figure 1 and 2 depict the load spreading insert (13) with its body inserted part (131) and its longitudinal hole (132). Figures 3 - 5 depict the fixing arm (12), which is designed to fix the side axle motor to the chassis, with its first end (121), its second end (122), and its longitudinal hole (124).

[0024] Figure 6 depicts the fixing arm (12) connected to the side axle (11) and the rim (101) and the motor (102) of the wheel (100) (in the figures the tire is not shown). Figure 7 depicts the fixing arm (12) connected to the side axle (11) in a position that the end (110) of the side axle protrudes from the hole in the fixing arm and is ready to be closed by a nut (112). Figure 8 depicts the side axle (11) on which the load spreading insert (13) is assembled. Figure 9 depicts the system (10) that comprises the side axle (11), the fixing arm (12) and the load spreading insert (13). Figures 10 - 11 depict the load spreading insert (13) when is about to be inserted into the longitudinal hole in the fixing arm (12). Figures 12 - 13 depict the load spreading insert (13) when is inserted into the longitudinal hole in the fixing arm (12).

Claims

ClaimsWhat is claimed is:

1. A system (10) for connecting a hub motor wheel (100) of an electric scooter or bicycle (300) to a chassis (200) of the electric scooter or bicycle (300), comprising:(a) a side axle (11) configured to connect to the hub motor wheel (100);(b) a fixing arm (12) having a first end (121) configured to connect to the side axle (11) and a second end (122) configured to connect to the chassis (200); and(c) a load- spreading insert (13), comprising an insert part (131) with an insert longitudinal hole (132); wherein cross-sectional shapes (133, 111) of the insert longitudinal hole (132) and the side axle (11) are identical, each formed as an elongated rectangle with two circular short sides, such that the insert longitudinal hole (132) is configured to receive the side axle (11); wherein cross-sectional shapes (134, 123) of the insert part (131) and a first arm longitudinal hole (124) in the first end (121) of the fixing arm (12) are identical, each formed as an elongated rectangle with at least two straight sides, such that the insert part (131) is configured to fit within the first arm longitudinal hole (124); and wherein rotational forces exerted by the side axle (11) are blocked by utilizing the straight sides of the cross-sectional shapes (134, 123) of the insert part (131) and the first arm longitudinal hole (124), which provide a counteracting push force against the rotational forces of the side axle (11).

2. The system of claim 1, wherein said fixing arm (12) is made of a lightweight metal, and said load- spreading insert (13) is made of a heavy metal;

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