Rear rocker arm assembly structure of motorcycle

Abstract

The motorcycle rear rocker arm assembly structure is installed between a motorcycle chassis and a motorcycle rear wheel and comprises a rear forklift frame and a rear rocker arm body, one side of the rear forklift frame is fixedly connected with the motorcycle chassis, the other side of the rear forklift frame is movably connected with the rear rocker arm body, the rear rocker arm body is movably connected with the motorcycle rear wheel, and the motorcycle rear rocker arm assembly structure further comprises a segmented shaft. The rear forklift frame is movably connected with the rear rocker arm body through the segmented shaft. According to the scheme, due to the fact that the rear flat fork truck frame is adopted, torsion loads of the rear wheels are prevented from being directly conducted to the truck frame body, and due to the fact that the rear flat fork truck frame is small in size and relatively easy to cast, replaceability of the rear flat fork truck frame is higher, and the truck is easy to maintain and repair. According to the scheme, a novel connecting structure is adopted, and the split rotating shaft with a pair of locks is adopted, so that the risk that the rear rocker arm falls off from the frame is effectively prevented.

Description

Technical Field

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

[0005] The traditional rear swing arm mounted on the motor shaft treats the motor's power output shaft as a whole long pin. However, when it is mounted on the frame, due to the limitation of the vehicle body space, it is necessary to use two shorter pin shafts to connect the rear swing arm separately. This method can easily cause the rear swing arm to fall off, increasing the risk of failure. Summary of the invention

[0006] 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:

[0007] The rear swing arm assembly structure of a motorcycle 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.

[0008] It also includes a segmented shaft, and the rear fork frame is movably connected to the rear swing arm body through the segmented shaft.

[0009] Furthermore, the rear swing arm body includes 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.

[0010] Further, the mounting arm is movably connected to the rear forklift frame.

[0011] Further, a first mounting position is provided on one side of the rear forklift frame, and a second mounting position is provided on the other side. The rear forklift 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.

[0012] Further, the segmented shaft includes a shaft sleeve and a shaft core matching the shaft sleeve. A bearing is provided on the outer side of the shaft sleeve. The bearing is provided at the end of the mounting arm. The shaft sleeve passes through the second mounting position and the end of the mounting arm and is locked with the shaft core.

[0013] Further, a hexagonal groove is formed in the second mounting position, and the end of the shaft sleeve is provided as a hexagonal end matching the hexagonal groove.

[0014] Further, a long plug pin is also provided between the opposite first mounting positions, and the rear forklift frame is fixedly connected to the motorcycle chassis through the long plug pin.

[0015] Further, there are at least two first mounting positions.

[0016] The rear swing arm assembly structure adopting the technical solution can at least achieve the following functional effects:

[0017] This solution abandons the traditional method of installing the rear swing arm on the motor power output shaft, and adopts a transition piece arranged on the vehicle frame main body, that is, the rear flat forklift frame described in this application. The rear swing arm is connected to the vehicle frame main body through the rear flat forklift frame, directly avoiding the rear wheel torsional load from being transmitted to the motor power output shaft again.

[0018] This solution adopting the rear flat forklift frame also avoids the rear wheel torsional load from being directly transmitted to the vehicle frame main body. Since the rear flat forklift frame is small in volume and relatively simple to cast, its replaceability is also higher, which is easy for vehicle maintenance and repair.

[0019] This solution adopts a new connection structure, that is, a split rotating shaft with a pair of locks, effectively preventing the risk of the rear swing arm falling off the vehicle frame. Description of the Drawings

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present disclosure. And throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 is a schematic diagram of the mounting structure of the present invention;

[0022] Figure 2 This is the front view of the rear forklift frame;

[0023] Figure 3 This is the rear view of the rear forklift frame;

[0024] Figure 4 This is the top view after the rear forklift frame is assembled with the rear swing arm body;

[0025] Figure 5 This is the side view after the rear forklift frame is assembled with the rear swing arm body;

[0026] Figure 6 This is Figure 5 the sectional view of the AA section of

[0027] Figure 7 This is the exploded side view of the assembly of the rear forklift frame and the rear swing arm body.

[0028] In the figure:

[0029] 1 - Rear forklift frame, 11 - First installation position, 12 - Second installation position, 121 - Hexagonal groove, 13 - Long pin;

[0030] 2 - Rear swing arm body, 21 - Rear suspension beam, 22 - Cross beam, 23 - Installation arm;

[0031] 3 - Split shaft, 31 - Bush, 311 - Hexagonal end, 32 - Shaft core, 33 - Bearing;

[0032] 4 - Motorcycle chassis. Specific implementation manners

[0033] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0034] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless otherwise clearly specified in the context, the expressions "a", "an", and "the" as used herein may also represent a plural form. The terms "include", "comprise", and "have" are inclusive and thus specify the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0035] Although terms such as 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 may 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. Additionally, in the description of the present disclosure, unless otherwise clearly specified and defined, the terms "arranged" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be directly connected, or indirectly connected through an intermediate medium; it may be a fluid connection, an electrical connection, or a mechanical connection. Additionally, in the description of the present disclosure, unless otherwise clearly specified and defined, the term "fixed" means connecting or fixing several components according to technical requirements, so as to achieve mechanical assembly while maintaining the correct relative positions and relationships, such as the mechanical connection method between a screw and a threaded hole. The term "electrical interface" does not limit the form of the 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 the present disclosure can be understood according to specific circumstances.

[0036] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms such as "above", "middle", "below", "inside", "near", etc. This spatial relative relationship term is intended to include different orientations of the device during use or operation other than the orientations depicted in the figure. For example, if the device in the figure is flipped, then an element described as "below other elements or features" or "beneath other elements or features" will subsequently be oriented as "above other elements or features" or "over other elements or features". Therefore, the exemplary term "below" can include both the above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0037] The structure of the motorcycle rear swing arm assembly disclosed by the present utility model includes a rear forklift frame 1 and a rear swing arm body 2.

[0038] Reference Figures 1-7, in the figure, structures such as lithium batteries can be mainly accommodated inside the motorcycle chassis 4. A rear forklift frame 1 is connected to the rear of the motorcycle chassis 4. In this embodiment, there should be two rear forklift frames 1, that is, the rear forklift frames 1 are respectively connected to both sides of the motorcycle chassis 4 to enhance the connection strength. However, this does not mean that only two rear forklift frames 1 can be connected. In actual use, one, three or more rear forklift frames 1 can also be selected for connection and installation. To maintain better stability, when one rear forklift frame 1 is selected, the rear forklift frame 1 should be kept at the middle position of the rear end face of the chassis, and when more than two rear forklift frames 1 are selected, it should be ensured that the distance between each rear forklift frame 1 is the same and is at the middle position of the rear end face of the motorcycle chassis 4.

[0039] A rear swing arm body 2 is movably connected to the rear of the rear forklift frame 1. The rear swing arm body 2 can be movably connected to the rear forklift frame 1 through a pin shaft, so that the rear swing arm body 2 can rotate relative to the pin shaft and the rear forklift frame 1.

[0040] The rear swing arm body 2 includes a rear suspension beam 21. One end of the rear suspension beam 21 is mounted on the rear wheel rotating shaft of the motorcycle, and the other side is designed with a cross beam 22, and the cross beam 22 is perpendicular to the aforementioned rear suspension beam 21. Perpendicular mounting arms 23 are provided at both ends of the rear suspension beam 21, and the end of the mounting arm 23 away from the cross beam 22 is movably connected to the aforementioned rear forklift frame 1 through a pin shaft.

[0041] In this embodiment, a first mounting position 11 is provided on one side of the rear forklift frame 1. There are at least two first mounting positions 11, and their arrangement is based on the shape of the rear end face of the motorcycle chassis 4. Selecting at least two first mounting positions 11 is to prevent relative rotation between the rear forklift frame 1 and the motorcycle chassis 4, so that the rear forklift frame 1 is suspended and the vehicle loses power. And a second mounting position 12 is provided on the other side of the rear forklift frame 1, and the second mounting position 12 can rotate relative to the mounting arm 23 through a pin shaft.

[0042] , in this embodiment, a long pin 13 is provided between two groups of opposite first mounting positions 11. The long pin 13 can pass through the pin sleeve provided on the rear end face of the motorcycle chassis 4 to achieve stable connection. Compared with the relatively split short pin shafts, the long pin shaft has better strength and can bear the weight of the rear forklift frame 1 and the rear swing arm and the impact during the movement process.

[0043] In this embodiment, a segmented shaft 2 is further designed between the aforementioned rear swing arm body 2 and the rear forklift frame 1. The segmented shaft 2 includes a bushing 31, a shaft core 32, and a bearing 33. Among them, the bushing 31 and the shaft core 32 are mutually matched. After the shaft core 32 is inserted into the bushing 31 and locked, a complete pin shaft is formed, thus basically enabling relative rotation between the rear forklift frame 1 and the mounting arm 23. In the present utility model, matching threads are provided on the inner part of the bushing 31 and the outer part of the shaft core 32, and the locking can be achieved only by turning the shaft core 32. The bearing 33 is arranged in the mounting arm 23, and the pin shaft formed by the cooperation of the bushing 31 and the shaft core 32 passes through the bearing 33 in the mounting arm 23 and the second mounting position 12 of the rear forklift frame 1.

[0044] A hexagonal groove 121 is formed on the inner side of the rear forklift frame 1, and the end of the bushing 31 is designed as a hexagonal end 311 that matches the aforementioned hexagonal groove 121, which is convenient for the installation of the shaft core 32.

[0045] In terms of 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 structure of the rear forklift frame 1 of the present utility model is very simple and can be formed by simple casting, which is very easy to repair and replace. Compared with repairing the motor, the cost performance of repairing or replacing the rear forklift frame 1 is higher.

Claims

1. The structure of the rear swing arm assembly of a motorcycle, which is installed between the motorcycle chassis and the motorcycle rear wheel, is characterized in that, It includes a rear forklift frame and a rear swing arm body. One side of the rear forklift 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 motorcycle rear wheel. It further includes a segmented shaft. The rear forklift frame is movably connected to the rear swing arm body through the segmented shaft.

2. The structure of the rear swing arm assembly of a motorcycle according to claim 1, characterized in that, The rear swing arm body includes a rear suspension beam. A cross beam is provided on the side of the rear suspension beam away from the motorcycle rear wheel. Mounting arms are provided on both ends of the cross beam away from the rear suspension beam.

3. The structure of the rear swing arm assembly of a motorcycle according to claim 2, characterized in that, The mounting arm is movably connected to the rear forklift frame.

4. The structure of the rear swing arm assembly of a motorcycle according to claim 2, characterized in that, One side of the rear forklift frame is provided with a first mounting position, and the other side is provided with a second mounting position. The rear forklift 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.

5. The structure of the rear swing arm assembly of a motorcycle according to claim 4, characterized in that, The segmented shaft includes a shaft sleeve, a shaft core matching the shaft sleeve. A bearing is provided on the outer side of the shaft sleeve. The bearing is provided on the end of the mounting arm. The shaft sleeve passes through the second mounting position and the end of the mounting arm and is locked with the shaft core.

6. The structure of the rear swing arm assembly of a motorcycle according to claim 5, characterized in that, A hexagonal groove is formed in the second mounting position. The end of the shaft sleeve is set to be a hexagonal end matching the hexagonal groove.

7. The structure of the rear swing arm assembly of a motorcycle according to claim 4, characterized in that, A long pin is further provided between the opposite first mounting positions. The rear forklift frame is fixedly connected to the motorcycle chassis through the long pin.

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