A rear wheel lifting and lowering mechanism

Abstract

The invention discloses a rear wheel lifting and lowering mechanism, comprising a backrest body; the left and right sides of the backrest body are respectively provided with a left side plate of a frame body and a right side plate of the frame body; a rear wheel shock absorber is movably installed at the bottom of the left and right sides of the backrest body; a rear right fork and a rear left fork are movably installed at the bottom of the rear wheel shock absorber, and the other ends of the rear right fork and the rear left fork are fixedly connected with a universal bearing group; the universal bearing group is slidably installed in the arc groove of the right side plate of the frame body and the left side plate of the frame body; the rear axle is plugged and installed in the mounting holes of the rear right fork and the rear left fork; the rear wheel is arranged at both ends of the rear axle; a frame crossbeam is provided on the front sides of the left side plate of the frame body and the right side plate of the frame body; the invention realizes the lifting and lowering of the rear wheel by adjusting the position of the universal bearing group in the arc groove of the right side plate of the frame body and the left side plate of the frame body; and the invention has reasonable design, simple structure and convenient operation.

Description

Technical Field

[0001] The invention relates to the technical field of power-assisted bicycles, in particular to a rear wheel lifting and lowering mechanism. Background Art

[0002] According to national standards, an electric bicycle (power-assisted bicycle) is defined as: using batteries as auxiliary energy, the vehicle's maximum speed shall not exceed 20 kilometers per hour, the mass shall not exceed 40 kilograms, and it must have a pedal function and be able to realize human riding and electric assist power functions; a power-assisted bicycle includes a frame, front wheels, rear wheels, a five-way bracket arranged at the bottom end of the frame, and an engine.

[0003] As the most popular means of transportation nowadays, electric assisted bicycles are mechatronic vehicles that use batteries as auxiliary energy and are improved on the basis of ordinary small cars with electric assistance. However, the rear wheel height of the assisted bicycles currently on the market cannot be adjusted in general, and cannot adapt to people of all heights, resulting in poor user experience. Summary of the invention

[0004] The object of the present invention is to provide a rear wheel lifting and lowering mechanism to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A rear wheel lifting and lowering mechanism comprises a backrest body; the left and right sides of the backrest body are respectively provided with a left side plate of a frame body and a right side plate of the frame body; a rear wheel shock absorber is movably installed at the bottom of the left and right sides of the backrest body; a rear right fork and a rear left fork are movably installed at the bottom of the rear wheel shock absorber, and the other ends of the rear right fork and the rear left fork are fixedly connected with a universal bearing group; the universal bearing group is slidably installed in the arc grooves of the right side plate of the frame body and the left side plate of the frame body; the rear axle is plug-in installed in the mounting holes of the rear right fork and the rear left fork; the rear wheel is arranged at both ends of the rear axle; and a frame crossbeam is provided on the front sides of the left side plate of the frame body and the right side plate of the frame body.

[0007] As a further solution of the present invention: a plurality of strip-shaped weight-reducing through holes are provided on the right side plate of the frame body and the left side plate of the frame body.

[0008] As a further solution of the present invention: a backrest soft bag A and a backrest soft bag B are provided on the right side plate of the frame body, and the backrest soft bag A is arranged on the upper side of the backrest soft bag B.

[0009] As a further solution of the present invention: the backrest soft bag A and the backrest soft bag B are filled with antibacterial sponge.

[0010] As a further solution of the present invention: bearing sleeves are provided at the connection between the rear right fork and the rear left fork and the rear axle.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention realizes the lifting and lowering of the rear wheel by adjusting the position of the universal bearing group in the arc groove of the right side plate and the left side plate of the frame body, thereby realizing the height adjustment of the power-assisted bicycle body to adapt to users of different heights and improving the user experience; and the present invention has a reasonable design, a simple structure and is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The figure is a schematic diagram of the exploded structure of a rear wheel landing mechanism.

[0013] Figure 2 The utility model is a schematic diagram of the operation of the rear wheel lifting and lowering of a rear wheel lifting and lowering mechanism.

[0014] Figure 3 The utility model is a schematic diagram of the working principle of the rear wheel lifting and lowering of a rear wheel lifting and lowering mechanism.

[0015] Figure 4 The figure is a schematic diagram of the rear wheel lifting and lowering height difference of a rear wheel lifting and lowering mechanism.

[0016] In the figure: backrest soft bag A1, backrest soft bag B2, backrest main body 3, frame main body right side plate 4, rear wheel 5, rear wheel shock absorber 6, rear right fork 7, rear axle 8, rear left fork 9, universal bearing group 10, frame main body left side plate 11, frame cross beam 12. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1 In an embodiment of the present invention, a rear wheel lifting and lowering mechanism comprises a backrest body 3; the left and right sides of the backrest body 3 are respectively provided with a frame body left side plate 11 and a frame body right side plate 4; a rear wheel shock absorber 6 is movably installed at the bottom of the left and right sides of the backrest body 3; a rear right fork 7 and a rear left fork 9 are movably installed at the bottom of the rear wheel shock absorber 6, and the other ends of the rear right fork 7 and the rear left fork 9 are fixedly connected to a universal bearing group 10; the universal bearing group 10 is slidably installed in the arc grooves of the frame body right side plate 4 and the frame body left side plate 11; the rear axle 8 is plugged and installed in the mounting holes of the rear right fork 7 and the rear left fork 9; the rear wheel 5 is arranged at both ends of the rear axle 8; a frame crossbeam 12 is provided on the front side of the frame body left side plate 11 and the frame body right side plate 4.

[0019] A plurality of strip-shaped weight-reducing through holes are provided on the right side plate 4 of the frame body and the left side plate 11 of the frame body.

[0020] The right side plate 4 of the frame body is provided with a backrest soft bag A1 and a backrest soft bag B2, and the backrest soft bag A1 is arranged on the upper side of the backrest soft bag B2.

[0021] The backrest soft bag A1 and the backrest soft bag B2 are filled with antibacterial sponge.

[0022] The connection places of the rear right fork 7 and the rear left fork 9 with the rear axle 8 are provided with bearing sleeves.

[0023] The working principle of the present invention is as follows: the present invention realizes the lifting and lowering of the rear wheel by adjusting the position of the universal bearing group in the arc groove of the right side plate and the left side plate of the frame body, thereby realizing the height adjustment of the power-assisted bicycle body to adapt to users of different heights and improve the user experience; and the present invention has reasonable design, simple structure and is easy to operate.

[0024] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0025] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A rear wheel lifting and lowering mechanism, characterized in that: It comprises a backrest body (3); the left and right sides of the backrest body (3) are respectively provided with a left side plate (11) of the frame body and a right side plate (4) of the frame body; The rear wheel shock absorber (6) is movably mounted on the bottom of the left and right sides of the backrest body (3); a rear right fork (7) and a rear left fork (9) are movably mounted on the bottom of the rear wheel shock absorber (6), and the other ends of the rear right fork (7) and the rear left fork (9) are fixedly connected to a universal bearing group (10); The universal bearing assembly (10) is slidably mounted in the arc grooves of the right side plate (4) of the frame body and the left side plate (11) of the frame body; The rear axle (8) is inserted and installed in the installation holes of the rear right fork (7) and the rear left fork (9); The rear wheels (5) are arranged at both ends of the rear axle (8); the front sides of the left side plate (11) and the right side plate (4) of the frame body are provided with a frame crossbeam (12); A plurality of strip-shaped weight-reducing through holes are provided on the right side plate (4) of the frame body and the left side plate (11) of the frame body; Bearing sleeves are provided at the connection points between the rear right fork (7) and the rear left fork (9) and the rear axle (8).

2. A rear wheel landing mechanism according to claim 1, characterized in that: A backrest soft bag A (1) and a backrest soft bag B (2) are provided on the right side plate (4) of the frame body, and the backrest soft bag A (1) is arranged on the upper side of the backrest soft bag B (2).

3. A rear wheel lifting and lowering mechanism according to claim 2, characterized in that: The backrest soft bag A (1) and the backrest soft bag B (2) are filled with antibacterial sponge.

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