Motorcycle frame light-weight high-strength connecting structure

Abstract

The utility model discloses a kind of motorcycle frame light weight high-strength connecting structure, including frame main pipe and frame branch pipe, connecting assembly is arranged between the frame main pipe and frame branch pipe, the connecting assembly includes first connecting sleeve and second connecting sleeve, two vertical semicylinders of up and down form complete vertical cylinder, the frame main pipe is inserted in horizontal cylinder interior, the frame branch pipe is inserted in vertical cylinder interior, the utility model relates to motorcycle frame technical field;The motorcycle frame light weight high-strength connecting structure, adopt first connecting sleeve and second connecting sleeve to form complete cylindrical structure, wrap frame main pipe and frame branch pipe, cooperate bolt rod, pad and the like component fixed, dispersed stress, avoid welding stress concentration, improve connection strength and frame fatigue resistance.No complex welding is needed for detachable bolt connection, simplify installation and disassembly, component damage can be individually replaced, reduce maintenance difficulty and cost.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle frame technology, specifically a lightweight and high-strength connection structure for motorcycle frames. Background Technology

[0002] Motorcycles, as a flexible and convenient means of transportation, are widely used in people's daily lives and travel. The frame, as the core load-bearing component of a motorcycle, directly affects its driving safety, handling, and fuel economy.

[0003] In current motorcycle frame designs, it is typically necessary to connect the main frame tube and the branch frame tubes to form a complete frame. Traditionally, welding is the most common method of connection; however, welding has many drawbacks.

[0004] On the one hand, the welding process generates high temperatures, which can easily cause changes in the material of the main frame tube and the branch frame tube, resulting in stress concentration and reducing the overall strength and fatigue life of the frame. On the other hand, the welding process requires high technical skills from the operators, and the welding quality is difficult to guarantee.

[0005] Therefore, this utility model provides a lightweight and high-strength connection structure for motorcycle frames to solve the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a lightweight and high-strength connection structure for motorcycle frames, thus solving the aforementioned problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a lightweight and high-strength connection structure for a motorcycle frame, comprising a main frame tube and a branch frame tube, wherein a connecting assembly is provided between the main frame tube and the branch frame tube, the connecting assembly comprising a first connecting sleeve and a second connecting sleeve, the first connecting sleeve and the second connecting sleeve being symmetrical vertically, each of the first connecting sleeve and the second connecting sleeve being composed of a horizontal semi-cylinder and a vertical semi-cylinder, the horizontal semi-cylinder and the vertical semi-cylinder being perpendicular to each other, the upper and lower two horizontal semi-cylinders forming a complete horizontal cylinder, the upper and lower two vertical semi-cylinders forming a complete vertical cylinder, the main frame tube being inserted into the horizontal cylinder, and the branch frame tube being inserted into the vertical cylinder.

[0008] Preferably, mounting holes are provided between the upper and lower sides of the main frame tube and the support frame tube, and connecting holes are provided inside the first connecting sleeve and the second connecting sleeve. Connecting holes are provided inside the horizontal tube and the vertical tube. The connecting holes and mounting holes are located in a one-to-one correspondence, and bolt rods are inserted into the upper and lower corresponding mounting holes and connecting holes.

[0009] Preferably, nuts are screwed into the threads at both ends of the bolt rod, and the main frame tube and the support frame tube are perpendicular to each other.

[0010] Preferably, a pad is attached to the outer side of both the first connecting sleeve and the second connecting sleeve, the inner sidewall of the pad is attached to the outer side of the first connecting sleeve and the second connecting sleeve, the outer sidewall of the pad is flat, and the upper and lower ends of the bolt rod pass through the interior of the corresponding pad respectively.

[0011] Preferably, washers are fitted onto the outer sides of the upper and lower ends of the bolt rod, the washers are attached to the outer side of the corresponding pad, and the nut is attached to the outer side of the corresponding washer.

[0012] Preferably, both the main frame tube and the branch frame tube are made of high-strength aluminum alloy, with a tensile strength of not less than 300MPa and a density of not more than 2.8g / cm³. The wall thickness of the main frame tube and the branch frame tube is 2-4mm, achieving lightweight design while ensuring structural strength.

[0013] Preferably, the first and second connecting sleeves are made of low-carbon alloy structural steel and are carburized and quenched, with a carburized layer depth of 0.8-1.2 mm and a surface hardness of HRC58-62; the pad is made of wear-resistant cast iron with a Brinell hardness of not less than 200 HB; the bolt rod is made of high-strength alloy structural steel with a yield strength of not less than 800 MPa; and the nut and washer are both made of alloy structural steel that matches the bolt rod and are galvanized and passivated to improve corrosion resistance.

[0014] Beneficial effects

[0015] This invention provides a lightweight, high-strength connection structure for motorcycle frames. Compared with existing technologies, it has the following advantages:

[0016] 1. This motorcycle frame features a lightweight, high-strength connection structure. It employs a first and second connecting sleeve to form a complete cylindrical structure, enclosing the main frame tube and support tubes. This is secured with bolts, washers, and other components, distributing stress, preventing welding stress concentration, and improving connection strength and frame fatigue resistance. The detachable bolt connection eliminates the need for complex welding, simplifying installation and disassembly. Damaged components can be replaced individually, reducing maintenance difficulty and cost.

[0017] 2. This motorcycle frame features a lightweight, high-strength connection structure. The main frame tube and support tubes are made of high-strength aluminum alloy with a tensile strength ≥300MPa and a density ≤2.8g / cm³, with a tube wall thickness of 2-4mm. This ensures strength while reducing weight, improving fuel economy and handling. Connecting sleeves are carburized and quenched, spacers are made of high-hardness, wear-resistant cast iron, and bolts are made of high-strength alloy and galvanized, ensuring the structure is wear-resistant and corrosion-resistant, extending the frame's lifespan. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a perspective view of the external structure of this utility model;

[0020] Figure 2 This is a three-dimensional view of the overall disassembled structure of this utility model;

[0021] Figure 3 This is the utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0022] Figure 4 This is a three-dimensional view of the connecting component of this utility model.

[0023] In the diagram: 1. Main frame tube; 2. Connecting assembly; 21. First connecting sleeve; 22. Second connecting sleeve; 23. Bolt rod; 24. Mounting hole; 25. Connecting hole; 26. Spacer; 27. Nut; 28. Washer; 3. Frame support tube. Detailed Implementation

[0024] It should be noted that in the description of the embodiments of this application, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0025] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Reference Figures 1 to 4 This application provides a lightweight, high-strength connection structure for a motorcycle frame, the specific structure of which is as follows:

[0027] Both the main frame tube 1 and the branch frame tube 3 are made of high-strength aluminum alloy, which has a tensile strength of 320 MPa and a density of 2.7 g / cm³. The wall thickness of both the main frame tube 1 and the branch frame tube 3 is 3 mm. By using this high-strength aluminum alloy and controlling the wall thickness, the main frame tube 1 and the branch frame tube 3 are ensured to have sufficient strength to withstand various loads during motorcycle operation, while their weight is effectively reduced, laying the foundation for the overall lightweight design of the motorcycle.

[0028] The connecting assembly 2 includes a first connecting sleeve 21 and a second connecting sleeve 22, which are symmetrically arranged vertically. Each connecting sleeve is integrally formed from a horizontal semi-cylinder and a vertical semi-cylinder. The horizontal and vertical semi-cylinders are perpendicular to each other, and their inner diameters match the outer diameters of the main frame tube 1 and the support frame tube 3, respectively. This ensures that the main frame tube 1 can be tightly inserted into the complete horizontal cylinder composed of the two horizontal semi-cylinders, and that the support frame tube 3 can be tightly inserted into the complete vertical cylinder composed of the two vertical semi-cylinders, thereby improving the stability and reliability of the connection.

[0029] Both the first connecting sleeve 21 and the second connecting sleeve 22 are made of low-carbon alloy structural steel. After machining, their surfaces undergo carburizing and quenching treatment, with the carburized layer depth controlled at 1.0 mm, resulting in a surface hardness of HRC60. This carburizing and quenching treatment significantly improves the surface hardness and wear resistance of the connecting sleeves, enhancing their service life under load and friction. Simultaneously, the low-carbon alloy structural steel itself possesses good toughness, preventing the connecting sleeves from breaking under impact.

[0030] Mounting holes 24 are respectively provided between the upper and lower sides of the inner sides of the main frame tube 1 and the support tube 3. The diameter of the mounting holes 24 is adapted to the outer diameter of the bolt rod 23. At the same time, connecting holes 25 are provided inside the horizontal semi-cylinder and the vertical semi-cylinder of the first connecting sleeve 21 and the second connecting sleeve 22. The position of the connecting holes 25 corresponds one-to-one with the mounting holes 24 on the main frame tube 1 and the support tube 3, and the diameter of the connecting holes 25 also matches the outer diameter of the bolt rod 23, so that the bolt rod 23 can pass smoothly through the mounting holes 24 and the connecting holes 25, realizing the connection between the connecting component 2 and the main frame tube 1 and the support tube 3.

[0031] A pad 26 is fitted to the outer side of both the first connecting sleeve 21 and the second connecting sleeve 22. The pad 26 is made of wear-resistant cast iron with a Brinell hardness of 220HB. The inner wall of the pad 26 is machined into an arc shape to fit against the outer wall of the connecting sleeve, while the outer wall is flat. This structural design allows the pad 26 to fit tightly against the outer side of the connecting sleeve, and provides a flat support surface for the subsequent installation of the washer 28 and nut 27, preventing excessive local pressure on the connecting sleeve during tightening of the nut 27 and potential damage. The upper and lower ends of the bolt shank 23 pass through through holes corresponding to those in the pad 26, with the hole diameter matching the outer diameter of the bolt shank 23.

[0032] The bolt rod 23 is made of high-strength alloy structural steel with a yield strength of 850MPa, capable of withstanding significant tensile and shear forces to ensure high strength of the connection structure. The nut 27 and washer 28 are both made of alloy structural steel matching the bolt rod 23, and their surfaces are galvanized and passivated. This passivation layer effectively isolates air and moisture, preventing corrosion of the nut 27 and washer 28 during use, improving their corrosion resistance, and extending their service life. The washer 28 is fitted onto the outer sides of the upper and lower ends of the bolt rod 23 and conforms to the outer side of the corresponding washer block 26. The nut 27 is screwed onto the threads at the upper and lower ends of the bolt rod 23 and conforms to the outer side of the corresponding washer 28. By tightening the nut 27, the first connecting sleeve 21, the second connecting sleeve 22, the washer block 26, the washer 28, and the main frame tube 1 and the support frame tube 3 are tightly connected together, forming a stable overall structure.

[0033] When installing the lightweight, high-strength connection structure of the motorcycle frame, first place the main frame tube 1 inside the horizontal semi-cylinder of the lower first connecting sleeve 21, and place the frame branch tube 3 inside the vertical semi-cylinder of the lower first connecting sleeve 21, ensuring that the mounting holes 24 on the main frame tube 1 and the frame branch tube 3 are aligned with the connecting holes 25 on the first connecting sleeve 21. Then, the upper second connecting sleeve 22 is placed over the first connecting sleeve 21, so that the horizontal semi-cylinder of the second connecting sleeve 22 and the horizontal semi-cylinder of the first connecting sleeve 21 form a complete horizontal cylinder that wraps around the main frame tube 1, and the vertical semi-cylinder of the second connecting sleeve 22 and the vertical semi-cylinder of the first connecting sleeve 21 form a complete vertical cylinder that wraps around the frame branch tube 3, while ensuring that the connecting holes 25 on the second connecting sleeve 22 are aligned with the mounting holes 24 on the main frame tube 1 and the frame branch tube 3, as well as the connecting holes 25 on the first connecting sleeve 21.

[0034] Next, place the spacers 26 onto the outer sides of the first connecting sleeve 21 and the second connecting sleeve 22, respectively, so that the upper and lower ends of the bolt shank 23 pass through the through holes on the spacers 26, the communicating holes 25 on the second connecting sleeve 22, the mounting holes 24 on the main frame tube 1 or the support frame tube 3, and the communicating holes 25 on the first connecting sleeve 21, respectively. Then, fit the washers 28 onto the outer sides of the upper and lower ends of the bolt shank 23, and finally screw the nuts 27 onto the threads of the bolt shank 23, and tighten the nuts 27 with a wrench or other tools until all parts fit tightly and are securely connected.

[0035] During use, this connection structure is lightweight yet strong due to the high-strength aluminum alloy materials used in the main frame tube 1 and the frame branch tube 3; the connecting sleeve in the connecting assembly 2 is made of low-carbon alloy structural steel that has undergone carburizing and quenching treatment, resulting in high hardness and good wear resistance; and the bolt rod 23 is made of high-strength alloy structural steel, capable of withstanding large loads. Furthermore, the bolted connection method avoids stress concentration issues caused by welding, giving the entire connection structure high strength and stability. In addition, this connection structure is easy to install and disassemble, and can be easily replaced when a component is damaged, reducing maintenance costs.

[0036] Furthermore, all contents not described in detail in this specification are existing technologies known to those skilled in the art, and all electrical components mentioned in this document are powered by external power supply lines.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight, high-strength connection structure for a motorcycle frame, comprising a main frame tube (1) and a support frame tube (3), characterized in that: A connecting component (2) is provided between the main frame tube (1) and the support tube (3). The connecting component (2) includes a first connecting sleeve (21) and a second connecting sleeve (22). The first connecting sleeve (21) and the second connecting sleeve (22) are symmetrical. Each first connecting sleeve (21) and the second connecting sleeve (22) is composed of a horizontal semi-cylinder and a vertical semi-cylinder. The horizontal semi-cylinder and the vertical semi-cylinder are perpendicular to each other. The two horizontal semi-cylinders form a complete horizontal cylinder, and the two vertical semi-cylinders form a complete vertical cylinder. The main frame tube (1) is inserted into the horizontal cylinder, and the support tube (3) is inserted into the vertical cylinder.

2. A high-strength connection structure for lightening a motorcycle frame according to claim 1, characterized in that: Mounting holes (24) are provided between the upper and lower sides of the frame main tube (1) and the frame branch tube (3). The first connecting sleeve (21) and the second connecting sleeve (22) are provided with connecting holes (25). The horizontal tube and the vertical tube are provided with connecting holes (25). The connecting holes (25) and the mounting holes (24) are located in a one-to-one correspondence. Bolt rods (23) are inserted into the upper and lower corresponding mounting holes (24) and connecting holes (25).

3. A high-strength connection structure for lightening a motorcycle frame according to claim 2, characterized in that: Nuts (27) are screwed into the threads at both ends of the bolt rod (23), and the main frame tube (1) and the support frame tube (3) are perpendicular to each other.

4. A high-strength connection structure for lightening a motorcycle frame according to claim 3, characterized in that: Both the first connecting sleeve (21) and the second connecting sleeve (22) have pads (26) attached to their outer sides. The inner sidewall of the pad (26) is attached to the outer side of the first connecting sleeve (21) and the second connecting sleeve (22). The outer sidewall of the pad (26) is flat. The upper and lower ends of the bolt rod (23) pass through the interior of the corresponding pad (26).

5. A high-strength connection structure for lightening a motorcycle frame according to claim 4, characterized in that: The upper and lower ends of the bolt rod (23) are fitted with washers (28), the washers (28) are attached to the outer side of the corresponding pad (26), and the nut (27) is attached to the outer side of the corresponding washer (28).

6. A high-strength connection structure for lightening a motorcycle frame according to claim 1, characterized in that: The main frame tube (1) and the branch frame tube (3) are both made of high-strength aluminum alloy. The tensile strength of the high-strength aluminum alloy is not less than 300MPa and the density is not greater than 2.8g / cm³. The wall thickness of the main frame tube (1) and the branch frame tube (3) is 2-4mm, which achieves lightweight design while ensuring structural strength.

7. A high-strength connection structure for lightening a motorcycle frame according to claim 4, characterized in that: The first connecting sleeve (21) and the second connecting sleeve (22) are made of low-carbon alloy structural steel and are carburized and quenched. The carburized layer depth is 0.8-1.2mm and the surface hardness reaches HRC58-62. The pad (26) is made of wear-resistant cast iron and its Brinell hardness is not less than 200HB. The bolt rod (23) is made of high-strength alloy structural steel and its yield strength is not less than 800MPa. The nut (27) and the washer (28) are both made of alloy structural steel that matches the bolt rod (23) and are galvanized and passivated to improve corrosion resistance.

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