Rear frame of motorcycle

Abstract

The motorcycle rear frame is installed at the rear end of the motorcycle chassis and comprises main supporting frames installed on the two sides of the rear end of the motorcycle chassis and a bearing beam fixedly connected between the main supporting frames, and a tail frame connected with the tail ends of the two main supporting frames is further arranged on the sides, away from the motorcycle chassis, of the main supporting frames. According to the scheme, a traditional circular tube type frame is abandoned, the integrally-formed frame plate is adopted as a main supporting part, and compared with a traditional rear frame, the strength is higher. According to the scheme, the tenon-and-mortise structures between the flanges and the holes are adopted for connection, a traditional face-to-face welding mode is changed, weld joint stress is changed from original up-down longitudinal stress to smaller left-right transverse stress, the number of welding fixing positions is increased from original one to two, and the welding reliability degree is greatly improved. In the scheme, even if a welding seam is broken and fails, compared with a traditional circular tube type frame, the rear frame of the scheme still cannot fail immediately, and the motorcycle can continue to run for a certain distance.

Description

Technical Field

[0001] The present disclosure relates to the field of motorcycles, and in particular to a rear frame of a motorcycle. Background Art

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

[0003] The motorcycle rear frame is used to install the motorcycle rear seat and other parts. It has an enclosed structure and is the rear part of the motorcycle body frame. Traditional motorcycle frames are formed by welding multiple sections of bent pipes. For example, Chinese patent CN209008796U, a motorcycle frame and a motorcycle, and its accessories Figure 1 The frame shown is a traditional motorcycle frame structure, and the opposite sides of the rear frame are connected by a straight round tube. The motorcycle frame using the traditional method has low overall strength, and on the other hand, due to the surface-to-surface welding method, the weld joint is very easy to break, and after the break, the whole frame fails and cannot be ridden any more. Summary of the invention

[0004] The purpose of the present invention is to provide a novel motorcycle rear frame with a double weld bead structure having a mortise and tenon structure. This purpose can be achieved by the following technical solutions:

[0005] The motorcycle rear frame is installed at the rear end of the motorcycle chassis, including main support frames installed on both sides of the rear end of the motorcycle chassis, and a load-bearing beam fixedly connected between the main support frames. A tail frame connecting the ends of the two main support frames is also provided on the side of the column main support frame away from the motorcycle chassis.

[0006] Furthermore, the main support frame has a certain thickness, and a relative installation channel is opened at the bottom thereof, and pins that cooperate with the installation channel extend from both ends of the load-bearing beam respectively.

[0007] Furthermore, the gaps on both sides after the latch and the installation channel are matched are respectively the first weld bead and the second weld bead, wherein the gap far from the load-bearing beam is the first weld bead, and the gap close to the load-bearing beam is the second weld bead.

[0008] Furthermore, the latch pin and the mounting channel are fixedly connected after being welded by a first weld bead and a second weld bead.

[0009] Furthermore, a first mounting position and a second mounting position are provided on one side of the main support frame, the first mounting position is fixedly connected to the upper edge of the motorcycle chassis, and the second mounting position is fixedly connected to the rear edge of the motorcycle chassis.

[0010] Furthermore, a pedal installation position is provided on a side of the main support frame away from the load-bearing beam.

[0011] Furthermore, the main support frame, the load-bearing beam and the tail frame are components integrally formed by liquid forging technology.

[0012] The rear frame structure of the present technical solution can at least achieve the following functional effects:

[0013] This solution abandons the traditional use of round tube frame and adopts one-piece frame panels as the main supporting components, which is stronger than the traditional rear frame.

[0014] This solution adopts the mortise and tenon structure connection between the flange and the hole, which changes the traditional face-to-face welding method. The weld stress is changed from the original up and down longitudinal stress to the smaller left and right lateral stress. The welding fixing position is also increased from one to two, which greatly enhances the reliability of welding.

[0015] In this solution, even if the weld breaks and fails, compared with the traditional round tube frame, the rear frame of this solution will not fail immediately, but can allow the motorcycle to continue to travel for a certain distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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:

[0017] Figure 1 is a schematic diagram of an explosion structure according to the present disclosure;

[0018] Figure 2 It is a schematic diagram of the side installation when installed on a motorcycle chassis according to the present disclosure.

[0019] In the figure:

[0020] 1-Motorcycle chassis;

[0021] 2-main support frame, 21-installation channel, 22-first weld bead, 23-second weld bead, 24-pedal installation position, 25-first installation position, 26-second installation position;

[0022] 3-bearing beam, 31-latch;

[0023] 4- Tailstock. 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 utility model discloses a rear frame of a motorcycle, which mainly comprises the following components:

[0029] The two main support frames 2 are respectively installed on both sides of the rear end of the motorcycle chassis 1, and are integrally formed by liquid forging technology. In this embodiment, the main support frame 2 is made of aluminum alloy material, and its strength is greatly improved compared with the traditional round tube frame.

[0030] In the technical solution, the front end of the main support frame 2 has two installation positions, one is a first installation position 25, which is installed along the upper edge of the motorcycle chassis 1, and the other is a second installation position 26, which is installed along the rear end surface of the motorcycle chassis 1. The two form a mutual support effect, making the installation more secure. In this embodiment, the first installation position 25 and the second installation position 26 are installed by inserting a long pin shaft into the corresponding hole position of the motorcycle chassis 1 and then locking it. The long pin shaft has high strength and is not easy to deform.

[0031] A hole is opened at the lower edge of the main support frame 2 . Since the main support frame 2 has a certain thickness, the hole forms a channel, namely, the installation channel 21 .

[0032] A load-bearing beam 3 is arranged between the two main support frames 2. A latch 31 matching the aforementioned installation channel 21 is extended from both sides of the load-bearing beam 3. The shape of the latch 31 matches the installation channel 21. The latch 31 forms a mortise and tenon structure after being inserted into the installation channel 21. In this embodiment, the outer edges of the latch 31 and the installation channel 21 are rectangular in shape, and the purpose of adopting this shape is to facilitate processing.

[0033] After the latch 31 is assembled in the installation channel 21, the gap between the entrance edges of the inner and outer sides of the installation channel 21 and the latch 31 forms the first weld bead 22 and the second weld bead 23. Among them, the first weld bead 22 is on the side away from the load beam 3, that is, the first weld bead 22 is on the outside of the installation channel 21, and the second weld bead 23 is on the side close to the load beam 3, that is, the second weld bead 23 is on the inside of the installation channel 21. After the first weld bead 22 and the second weld bead 23 are welded, the latch 31 and the installation channel 21 are welded.

[0034] Compared with the traditional round tube frame, which has only one side welded to another round tube frame, the present embodiment first adopts a mortise and tenon structure so that the load-bearing beam 3 can always be placed on the main support frame 2. In addition, the present embodiment also designs two welding welds on each side, which greatly enhances the reliability of the rear frame.

[0035] Compared with the traditional design, if only one weld on one side fails, the entire rear frame will collapse. However, with this design, even if all four welds on both sides fail, the rear frame can still maintain a certain stability under the thrust of other components, making it easier for the driver to push the vehicle or even ride it to a repair shop for maintenance.

[0036] A tail frame is also designed at the rear end of the main support frame 2, which further strengthens the connection between the main support frames 2 on both sides and reduces the risk of falling off due to vibration.

[0037] A pedal mounting position 24 is provided on the outer side surface of the main support frame 2, through which a pedal can be installed to achieve the multifunctionality of the rear frame.

[0038] In this embodiment, except for the main support frame 2, the aforementioned load-bearing beam 3 and the tail frame are all integrally formed by liquid forging technology, and have high strength.

Claims

1. The motorcycle rear frame is installed at the rear end of the motorcycle chassis, characterized in that: It comprises main support frames installed on both sides of the rear end of the motorcycle chassis, and a load-bearing beam fixedly connected between the main support frames. A tail frame connecting the ends of the two main support frames is also arranged on the side of the main support frame away from the motorcycle chassis.

2. The motorcycle rear frame according to claim 1, characterized in that: The main support frame has a certain thickness, and a relative installation channel is opened at the bottom thereof. Pins that match the installation channel extend from both ends of the load-bearing beam respectively.

3. The motorcycle rear frame according to claim 2, characterized in that: The gaps on both sides of the latch and the installation channel after being matched are respectively the first weld bead and the second weld bead, wherein the gap far from the load-bearing beam is the first weld bead, and the gap close to the load-bearing beam is the second weld bead.

4. The motorcycle rear frame according to claim 3, characterized in that: The latch pin and the installation channel are fixedly connected after being welded by a first weld bead and a second weld bead.

5. The motorcycle rear frame according to claim 1, characterized in that: A first mounting position and a second mounting position are provided on one side of the main support frame, wherein the first mounting position is fixedly connected to the upper edge of the motorcycle chassis, and the second mounting position is fixedly connected to the rear edge of the motorcycle chassis.

6. The motorcycle rear frame according to claim 1, characterized in that: A pedal installation position is arranged on one side of the main support frame away from the load-bearing beam.

7. The motorcycle rear frame according to claim 1, characterized in that: The main support frame, the load-bearing beam and the tail frame are components integrally formed by using liquid die forging technology.

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