Integrated auxiliary frame structure

Abstract

The embodiment of the invention provides an integrated auxiliary frame structure which comprises a main frame and an auxiliary frame, the main frame is composed of two integrated aluminum alloy casting parts, the auxiliary frame is integrally cast and formed by aluminum alloy, and the auxiliary frame is provided with at least one connecting part connected with the main frame; the connecting part is provided with longitudinal bolt holes and at least four longitudinal bolts, and the bolts penetrate through the corresponding bolt holes to connect the auxiliary frame with the tail part of the main frame. According to the auxiliary frame structure, the number of parts is reduced, the production and assembly time is shortened, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motorcycle manufacturing, in particular to an integrated subframe structure. Background Art

[0002] Traditional motorcycle subframes are typically welded together from dozens of parts, resulting in complex manufacturing processes, long assembly times, heavy weight, low production efficiency, and the potential for weld deformation and stress concentration. Furthermore, conventional subframes are often connected to the main frame by welding or bolting, and improper bolting arrangements can easily generate shear forces, all of which can affect the strength and stability of the connection. With the advancement of technology and increasing environmental protection requirements, the motorcycle manufacturing industry is increasingly demanding lightweight and environmentally friendly designs. Therefore, a new type of motorcycle subframe is needed to address the challenges of existing technologies. Summary of the Invention

[0003] The main purpose of the present invention is to provide an integrated subframe structure to solve one of the problems existing in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an integrated subframe structure, comprising: a main frame and a subframe, wherein the main frame is composed of two integrated aluminum alloy castings, and the subframe is formed by integrated casting of aluminum alloy, and the subframe has at least one connecting portion connected to the main frame; the connecting portion is provided with longitudinal bolt holes and at least four longitudinal bolts, which pass through the corresponding bolt holes to connect the subframe to the rear end of the main frame.

[0005] According to some embodiments of the present invention, the sub-frame further includes: a first rib and a second rib extending rearward and upward from the connecting portion.

[0006] According to some embodiments of the present invention, the subframe further includes: a rectifier, which is disposed between the left and right rear footrest brackets. When the vehicle is viewed from the side, at least a portion of the rectifier overlaps with the rear footrest brackets. The placement of the rectifier in the middle of the rear footrest brackets ensures both aesthetics and improved heat dissipation.

[0007] According to some embodiments of the present invention, the sub-frame is provided with a first cavity and a second cavity. The first cavity can be used to arrange vehicle electrical components, and the second cavity can be used to store daily use documents.

[0008] According to some embodiments of the present invention, the sub-frame is provided with a pair of left and right seat cushion support components, and the seat cushion support components enhance the stability of the seat.

[0009] According to some embodiments of the present invention, the sub-frame is provided with a sub-seat cushion support portion.

[0010] According to some embodiments of the present invention, the lower back portion and the seat cushion support portion of the sub-frame can be directly used as covering members.

[0011] According to some embodiments of the present invention, the auxiliary seat cushion supporting portion is higher than the seat cushion supporting portion.

[0012] According to some embodiments of the present invention, the subframe is formed by die-casting of a high-strength aluminum alloy.

[0013] By adopting the above technical solution, the motorcycle subframe of the present invention has the following advantages: 1. The one-piece die-cast subframe has high rigidity and strength and can withstand a large load.

[0014] 2. One-piece aluminum alloy die-casting reduces the number of parts and production and assembly time, and improves production efficiency.

[0015] 3. The first seat cushion support portion can not only support the first seat cushion, but also be used as an external cover, thereby reducing the number of covers and lowering manufacturing costs.

[0016] 4. The subframe is connected to the main frame through four longitudinal bolts, which avoids the occurrence of shear force and improves the stability of the subframe.

[0017] 5. The first cavity is used to install vehicle electrical components, and the second cavity can store daily use documents, increasing the functionality of the subframe.

[0018] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which Figure 1 is a left side view of a two-wheeled vehicle according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the main frame and auxiliary vehicle of a two-wheeled vehicle according to an embodiment of the present invention; Figure 3 1 is a schematic diagram of a subframe of a two-wheeled vehicle according to an embodiment of the present invention; Reference numerals: Front wheel 1; front fork 2; front fender 3; front cover 4; rearview mirror 5; turn signal 6; windshield 7; steering handle 8; main frame 9; fuel tank 10; first seat 11; subframe 12; second seat 13; rear fender 14; rear footrest bracket 15; rear wheel 16; chain plate 17; rear swingarm 18; exhaust purification device 19; Engine 20; brake disc 21; instrument assembly 22; chain 23; side stand 24; brake caliper 25; foot pedal 26; head bracket 27; bolt 50; seat tube 51; suspension bracket 52; pivot frame 53; pivot 54; body frame B; connecting portion 55; electrical component mounting bracket 100; auxiliary seat cushion lock mounting portion 101; bolt hole 102; seat cushion support portion 106; auxiliary seat cushion support portion 107; first cavity 108; second cavity 109, rectifier 110, lower back portion 111, first rib 112, second rib 113. DETAILED DESCRIPTION

[0020] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0021] In the description of the present invention, "several" means one or more, "multiple" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0022] The terms used in the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0023] The term "and / or" as used herein simply describes a relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0024] The directional terms such as "upper", "lower", "left", and "right" described in the present invention are described based on the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] It should be clear that the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] Referring to the accompanying drawings, the vehicle body frame B comprises a pair of left and right main frames 9 extending rearward and downward from a seat tube 51; left and right suspension frames 52 extending from the seat tube 51 below the main frames 9 and toward the rear and downward portion of the vehicle body; and a pair of left and right pivot frames 53 connected to the rear lower portions of the main frames 9. A subframe 12, formed of a one-piece die-cast aluminum alloy, is connected to the rear portion of the main frames 9.

[0028] A subframe 12 is bolted to the main frame 9. The subframe's upper portion supports a first seat cushion 11 and a second seat cushion 12, which are locked to a second seat cushion lock mounting portion. The vehicle's electrical components (not shown) are supported on an electrical component bracket. A rear fender 14 is connected to the end of the subframe. A pair of left and right rear footrest brackets 15 are located on either side of the subframe 12 behind the first seat cushion 11.

[0029] The engine 20 is supported between the suspension frame 52 and the pivot frame 53. A radiator (not shown) is located in front of the suspension frame 53. Engine combustion gases pass through an exhaust pipe (not shown) and enter the exhaust purification device 19 for purification before being discharged. A side stand 24 is pivotally supported at the lower end of the pivot frame 53 on the left side in the vehicle width direction. A pair of left and right footrests 26 are located on the pivot frame 53 above and behind the side stand 24.

[0030] The pivot frame 53 supports a pivot 54 that pivotally supports the front end of the rear swing arm 18 in a swingable manner. The driving force of the engine 20 is transmitted via the chain 23 to the chain plate 17 and the rear wheel 16 that are rotatably supported on the rear end of the swing arm 18.

[0031] A fuel tank 10 for storing fuel for the engine 20 is arranged above the main frame 9 between the seat pipe 51 and the first seat cushion 11 .

[0032] The front wheel 1 is supported by a freely rotatable shaft between a pair of front forks 2. Left and right steering handlebars 8 for steering the front wheel are mounted on the upper end of each front fork 2. Brake calipers 25 are mounted on the lower end of each front fork 2. Brake discs 21 corresponding to each brake caliper 25 are mounted on either side of the hub of the front wheel 2, forming the front disc brake of the motorcycle.

[0033] A front fender 4 that covers the front wheel 1 from above is attached to the front fork 2 .

[0034] A head support 27 is located in front of the steering handlebar 8 and supported by a riser 51. The front panel 4 is supported by the head support 27. A pair of rearview mirrors 5 are located on either side of the front panel, with a pair of turn signals located in front of the mirrors 5. A windshield 7 is located at the upper end of the front panel 4. The instrument panel assembly is located below the windshield and supported by the head support 27.

[0035] According to some embodiments of the present invention, the sub-frame further includes a first rib 112 and a second rib 113 extending rearward and upward from the connecting portion 55 .

[0036] According to some embodiments of the present invention, the subframe further includes a rectifier 110 disposed between the left and right rear footrest brackets 15. When the vehicle is viewed from the side, at least a portion of the rectifier 110 overlaps with the rear footrest brackets 15. Placing the rectifier 110 between the rear footrest brackets 15 ensures aesthetics and improves heat dissipation.

[0037] According to some embodiments of the present invention, the subframe 12 is provided with a first cavity 108 and a second cavity 109 . The first cavity 108 is provided with vehicle electrical components, and the second cavity 109 can be used to store daily use documents.

[0038] According to some embodiments of the present invention, the sub-frame 12 is provided with a pair of left and right seat cushion support components 108 , and the seat cushion support components 108 enhance the stability of the seat.

[0039] According to some embodiments of the present invention, the main frame 10 and the sub-frame 12 are connected by at least two longitudinal bolts 50 .

[0040] According to some embodiments of the present invention, the sub-frame 12 is provided with a sub-seat cushion support portion 107 .

[0041] According to some embodiments of the present invention, the lower back portion 111 of the sub-frame 12 and the seat cushion support portion 107 can be directly used as covering members.

[0042] According to some embodiments of the present invention, the auxiliary seat cushion support portion 107 is higher than the seat cushion support portion 106 .

[0043] According to some embodiments of the present invention, the subframe 12 is formed by die-casting of a high-strength aluminum alloy.

[0044] Through the above-described method, the present invention achieves a high-strength, stable connection between the subframe and the main frame, effectively preventing the generation of shear forces. Furthermore, the one-piece die-cast subframe exhibits high rigidity and strength, capable of withstanding large loads and providing a large internal space. Furthermore, the arrangement of the longitudinal bolts fully utilizes the structural characteristics of the subframe and main frame, achieving a more rational and reliable connection.

[0045] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An integrated subframe structure, comprising: The main frame and the subframe are composed of two integrated aluminum alloy castings, and the subframe is formed by integrated casting of aluminum alloy. The subframe has at least one connecting portion connected to the main frame; the connecting portion is provided with longitudinal bolt holes and at least four longitudinal bolts, which pass through the corresponding bolt holes to connect the subframe to the rear end of the main frame.

2. The integrated subframe structure according to claim 1, characterized in that: The sub-frame further includes a first rib and a second rib extending rearward and upward from the connecting portion.

3. The integrated subframe structure according to claim 1, characterized in that: The sub-frame further includes a rectifier, which is arranged between the left and right rear footrest brackets. When the vehicle is viewed from the side, at least a portion of the rectifier overlaps with the rear footrest brackets.

4. The integrated subframe structure according to claim 1, characterized in that: The sub-frame is provided with a first cavity and a second cavity, wherein the first cavity is used for arranging vehicle electrical components.

5. The integrated subframe structure according to claim 1, characterized in that: The auxiliary frame is provided with a pair of left and right seat cushion support components, and the seat cushion support components enhance the stability of the seat.

6. The integrated subframe structure according to claim 1, characterized in that: The auxiliary frame is provided with an auxiliary seat cushion support portion.

7. The integrated subframe structure according to claim 1, characterized in that: The lower back portion and the seat cushion support portion of the auxiliary frame can be directly used as covering parts.

8. The integrated subframe structure according to claim 6, characterized in that: The auxiliary seat cushion supporting portion is higher than the seat cushion supporting portion.

9. The integrated subframe structure according to claim 1, characterized in that: The subframe is formed by die-casting of high-strength aluminum alloy.

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