Motorcycle rear swing arm structure

Abstract

The rear swing arm structure of a motorcycle is installed between the motorcycle chassis and the rear wheel of the motorcycle, and includes a rear fork frame and a rear swing arm body. One side of the rear fork frame is fixedly connected to the motorcycle chassis, and the other side is movably connected to the rear swing arm body. The rear swing arm body is movably connected to the rear wheel of the motorcycle. This solution abandons the traditional way of installing the rear swing arm on the power output shaft of the motor, and adopts a transition piece provided on the frame body, that is, the rear flat fork frame described in this application, through which the rear swing arm is connected to the frame body, directly preventing the torsional load of the rear wheel from being transmitted to the power output shaft of the motor.

Description

Technical Field

[0001] The present disclosure relates to the field of motorcycle rear suspension, and in particular to a motorcycle rear swing arm structure. Background Art

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] The rear swing arm of a motorcycle is used to connect the rear wheel to the motorcycle body, frame, shock absorber and other parts, and plays the role of bearing the pressure of the body, fixing the rear wheel and maintaining the stability of the body. For two-wheeled vehicles with mid-mounted motors, especially electric motorcycles with higher driving speeds, the rear swing arm is usually directly connected to the output shaft of the mid-mounted motor. For example, the Chinese utility model patent CN113264141B has an attachment. Figure 2 What is shown is a more common rear swing arm mounting method, in which a rear swing arm 6 is mounted on the power output shaft 57.

[0004] This type of rear swing arm installation method will cause certain problems. When a two-wheeled vehicle turns, the body of the vehicle tilts toward the turning side, so the torsional load of the rear wheel will be transmitted to the motor output shaft through the rear swing arm, which will cause irreversible damage to the output shaft over time. Summary of the invention

[0005] The purpose of the present disclosure is to provide a new type of rear swing arm structure, which aims to make the rear swing arm no longer mounted on the motor shaft, thereby eliminating the torque transmitted to the motor shaft by the rear wheel when the motorcycle turns. This purpose can be achieved by the following technical solutions:

[0006] A motorcycle rear swing arm structure comprises a rear fork frame and a rear swing arm body, wherein one side of the rear fork frame is fixedly connected to the motorcycle chassis, and the other side is movably connected to the rear swing arm body, and the rear swing arm body is movably connected to the rear wheel of the motorcycle. The rear swing arm body comprises a rear suspension beam, and a cross beam is arranged on the side of the rear suspension beam away from the rear wheel of the motorcycle, and mounting arms are arranged on both ends of the cross beam away from the side of the rear suspension beam.

[0007] Furthermore, the mounting arm is movably connected to the rear fork frame.

[0008] Furthermore, a first mounting position is provided on one side of the rear fork frame, and a second mounting position is provided on the other side. The rear fork frame is fixedly connected to the motorcycle chassis through the first mounting position, and is movably connected to the mounting arm through the second mounting position.

[0009] Furthermore, a long latch is provided between the relative first installation positions, and the rear fork frame is fixedly connected to the motorcycle chassis via the long latch.

[0010] Furthermore, there are at least two first installation positions.

[0011] The steering structure of this technical solution can at least achieve the following functional effects:

[0012] This solution abandons the traditional way of installing the rear swing arm on the power output shaft of the motor, and adopts a transition piece set on the frame body, namely the rear flat fork frame described in this application, through which the rear swing arm is connected to the frame body, directly preventing the torsional load of the rear wheel from being transmitted to the power output shaft of the motor.

[0013] The solution adopts a rear flat fork frame and also avoids the torsional load of the rear wheel being directly transmitted to the frame body. Since the rear flat fork frame is small in size and relatively simple to cast, it is more replaceable and easy to maintain and repair the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the installation structure of the utility model;

[0016] Figure 2 This is the front view of the rear fork frame;

[0017] Figure 3 This is the rear view of the rear fork frame;

[0018] Figure 4 It is a top view of the rear fork frame and the rear swing arm body after assembly;

[0019] Figure 5 This is a side view of the rear fork frame and rear swingarm body after assembly.

[0020] In the figure:

[0021] 1-rear fork frame, 11-first mounting position, 12-second mounting position, 13-long latch;

[0022] 2-rear swing arm body, 21-rear suspension beam, 22-cross beam, 23-mounting arm;

[0023] 3-Motorcycle chassis. DETAILED DESCRIPTION

[0024] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0025] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the expressions "a", "an", and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", and "have" are inclusive and therefore specify the presence of stated features, elements, and / or parts, but do not exclude the presence or addition of one or more other features, elements, parts, and / or combinations thereof.

[0026] Although the terms first, second, etc. may be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and "third" and other numerical terms do not imply order or sequence when used in the text. In addition, in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium; it can be a fluid connection, an electrical connection or a mechanical connection. In addition, in the description of the present disclosure, unless otherwise clearly specified and limited, the term "fixed" means that several components are connected or fixed according to technical requirements, so as to achieve mechanical assembly while maintaining the correct relative position and mutual relationship, such as the mechanical connection between screws and screw holes. The term "electrical interface" does not limit the form of an electrical connector, but can be any coupling device that connects electrical terminals to form a circuit. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0027] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "upper", "middle", "lower", "inside", "near", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, then the element described as "below other elements or features" or "below other elements or features" will be subsequently oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0028] The motorcycle rear swing arm structure disclosed in the utility model comprises a rear fork frame 1 and a rear swing arm body 2.

[0029] refer to Figure 1 as well as Figure 5 In the figure, the motorcycle chassis 3 can mainly accommodate structures such as lithium batteries. A rear fork frame 1 is connected to the rear of the motorcycle chassis 3. In this embodiment, there should be two rear fork frames 1, that is, the two sides of the motorcycle chassis 3 are respectively connected to a rear fork frame 1 to enhance the connection strength. However, this does not mean that only two rear fork frames 1 can be connected. In actual use, one or three or more rear fork frames 1 can also be selected for connection and installation. In order to maintain better stability, when selecting a rear fork frame 1, the rear fork frame 1 should be kept in the middle position of the rear end face of the chassis, and when more than two rear fork frames 1 are selected, it should be ensured that the distance between each rear fork frame 1 is the same and is in the middle position of the rear end face of the motorcycle chassis 3.

[0030] A rear swing arm body 2 is movably connected to the rear of the rear fork frame 1 . The rear swing arm body 2 can be movably connected to the rear fork frame 1 through a pin shaft, so that the rear swing arm body 2 can rotate relative to the rear fork frame 1 around the pin shaft.

[0031] The rear swing arm body 2 includes a rear suspension beam 21, one end of which is mounted on the rear wheel shaft of the motorcycle, and the other side is designed with a cross beam 22, which is arranged perpendicular to the aforementioned rear suspension beam 21. Mounting arms 23 perpendicular to the rear suspension beam 21 are arranged at both ends of the rear suspension beam 21, and the mounting arms 23 are movably connected to the aforementioned rear fork frame 1 through a pin shaft at the ends of the cross beam 22.

[0032] In this embodiment, a first mounting position 11 is provided on one side of the rear fork frame 1. There are at least two first mounting positions 11, which are arranged according to the shape of the rear end surface of the motorcycle chassis 3. The purpose of selecting at least two first mounting positions 11 is to prevent the rear fork frame 1 from rotating relative to the motorcycle chassis 3, thereby causing the rear fork frame 1 to be suspended in the air and causing the vehicle to lose power. A second mounting position 12 is provided on the other side of the rear fork frame 1, and the second mounting position 12 can rotate relative to the mounting arm 23 through a pin shaft.

[0033] In this embodiment, a long pin 13 is arranged between the two sets of opposite first mounting positions 11, and the long pin 13 can pass through the pin sleeve arranged on the rear end surface of the motorcycle chassis 3 to achieve a stable connection. Compared with the split short pin, the long pin has better strength and can bear the weight of the rear fork frame 1 and the rear swing arm and the impact during movement.

[0034] In this embodiment, compared with the traditional motorcycle rear swing arm, when the motorcycle turns, the torsional force generated by the tilting of the rear wheel is no longer transmitted to the motor shaft, which can ensure the long-term and effective operation of the motor shaft. At the same time, the rear fork frame 1 of the utility model has a very simple structure and can be formed by simple casting, which is very easy to repair and replace. Compared with repairing the motor, repairing or replacing the rear fork frame 1 is more cost-effective.

Claims

1. The motorcycle rear swing arm structure is installed between the motorcycle chassis and the motorcycle rear wheel, and is characterized in that: It comprises a rear fork frame and a rear swing arm body, wherein one side of the rear fork frame is fixedly connected to the motorcycle chassis, and the other side is movably connected to the rear swing arm body, and the rear swing arm body is movably connected to the rear wheel of the motorcycle; The rear swing arm body comprises a rear suspension beam, a cross beam is arranged on the side of the rear suspension beam away from the rear wheel of the motorcycle, and mounting arms are arranged on both ends of the cross beam away from the side of the rear suspension beam.

2. The motorcycle rear swing arm structure according to claim 1, characterized in that: The mounting arm is movably connected to the rear fork frame.

3. The motorcycle rear swing arm structure according to claim 1, characterized in that: A first mounting position is arranged on one side of the rear fork frame, and a second mounting position is arranged on the other side. The rear fork frame is fixedly connected to the motorcycle chassis through the first mounting position, and is movably connected to the mounting arm through the second mounting position.

4. The motorcycle rear swing arm structure according to claim 3, characterized in that: A long latch is also provided between the first mounting positions opposite to each other, and the rear fork frame is fixedly connected to the motorcycle chassis via the long latch.

5. The motorcycle rear swing arm structure according to claim 4, characterized in that: There are at least two first installation positions.

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