Split type light-weight high-strength off-road motorcycle frame and off-road motorcycle

Abstract

The utility model relates to the technical field of motorcycles, and provides a split type light-weight high-strength cross-country motorcycle frame and a cross-country motor.The split type light-weight high-strength cross-country motorcycle frame comprises an engine bent pipe frame and a tail frame installed on the engine bent pipe frame, the bent main beam is fixed above the engine bent pipe frame; the reinforcing piece is arranged between the bent main beam and the engine bent pipe frame; the two front bracket plates are arranged in the engine bent pipe frame and are far away from one side of the tail frame; the utility model has the beneficial effects that a large-volume oil tank can be mounted, and the strength of the bent main beam and the bent pipe frame of the engine is enhanced; the two front bracket plates replace an auxiliary frame of a traditional cradle type frame, parts are reduced, assembly is easy, the weight is light, and the manufacturing cost is low. The engine is compactly fixed in the engine bent pipe frame, and vibration and shaking of the whole vehicle are effectively restrained; the tailstock is installed in an assembled mode, and later upgrading and refitting can be facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of motorcycles, in particular to a split-type lightweight high-strength off-road motorcycle frame and an off-road motorcycle. Background Art

[0002] An off-road motorcycle is a two-wheeled motorcycle designed for off-road environments, primarily used in various off-road events and all-terrain vehicle racing.

[0003] Existing off-road motorcycles mostly use cradle-type frames or single-beam integral frames. These two types of frames have the following problems:

[0004] Traditional single-beam frame: lacks rigidity and strength, affects the shape and volume of the fuel tank, and due to the obstruction of the upper single beam, cannot place large-volume, high-displacement engines with large cylinder heads, seriously limiting the performance and safety of off-road motorcycles; in addition, the integral single-beam frame is not conducive to later modification and upgrading, and the overall weight is large, which to a certain extent weakens the overall performance of the off-road vehicle.

[0005] Traditional cradle-style frames have numerous parts, are heavy, and require complex manufacturing processes, resulting in high manufacturing costs. Furthermore, the large number of parts and welds leads to significant welding stress and deformation throughout the frame, making assembly difficult and posing a risk of fracture near the welds. A split, lightweight, high-strength off-road motorcycle frame and off-road motorcycle are urgently needed to address these issues. Utility Model Content

[0006] In view of the above technical problems existing in the prior art, a split-type lightweight and high-strength off-road motorcycle frame and an off-road motorcycle are provided.

[0007] The purpose and effect of this utility model are achieved by the following specific technical means:

[0008] A split-type lightweight, high-strength off-road motorcycle frame includes an engine bent tube frame and a tail frame mounted on the engine bent tube frame. The frame also includes a bent main beam fixed above the engine bent tube frame, a reinforcement installed between the bent main beam and the engine bent tube frame, and two front bracket plates installed in the engine bent tube frame and away from the tail frame. The tail frame is detachably connected to the lower end of the bent main beam and the two sides of the outer wall of the engine bent tube frame.

[0009] Furthermore, the bent main beam is provided with a plurality of bent portions from top to bottom, and the lower end of the upper side of the engine bent tube frame is welded to the lowermost bent portion.

[0010] Furthermore, the reinforcement includes a first support plate and a second support plate, the first support plate is welded at the upper angle between the bent main beam and the engine bent tube frame, and the second support plate is welded at the lower angle between the bent main beam and the engine bent tube frame.

[0011] Furthermore, the lowest point on the upper side of the first support plate extends to the uppermost bending portion of the bent main beam.

[0012] Furthermore, the reinforcement member further includes a support tube, which is welded to the lower side of the first support plate and welded to one of the bent portions.

[0013] Furthermore, the support plate, support tube and bent main beam form a triangle.

[0014] Furthermore, a first mounting member is fixed to the lower end of the bent main beam, and second mounting members are fixed to both sides of the outer wall of the engine bent pipe frame close to the tail frame. The tail frame is bolted to the first mounting member and two of the second mounting members.

[0015] Furthermore, the tailstock is made of lightweight materials.

[0016] The utility model also provides an off-road motorcycle, comprising the above-mentioned split lightweight high-strength off-road motorcycle frame, an engine and a fuel tank, wherein the engine is installed in the engine bent tube frame, and the engine is bolted to the two front bracket plates, and the fuel tank is installed above the engine and located below the bent main beam.

[0017] Furthermore, the engine bent pipe frame is 300 mm away from the ground.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. Compared with the traditional cradle-type frame, the present invention replaces the subframe of the traditional cradle-type frame by adding two lightweight front bracket plates, which reduces the number of parts and the number of frame welding points. This can not only achieve the rigidity of the traditional cradle-type frame and facilitate the assembly of the front bracket plates, but also effectively reduce the weight of the motorcycle frame and reduce its manufacturing cost. With the use of the two front bracket plates, the connection between the engine and the engine elbow frame is more compact and the fixation is more compact, which can effectively suppress vibration to a certain extent.

[0020] 2. This application makes adjustments to the main beam of the traditional single-beam off-road vehicle frame. First, a bent main beam is adopted, and the installation space of the fuel tank is expanded by increasing the bending amount of the main beam; second, the effective load-bearing cross-section of the entire vehicle is strengthened by adding reinforcements, so that the torsional characteristics of the entire vehicle are enhanced, and the rigidity and strength are also increased; third, the tail frame adopts an assembled installation, which can be convenient for later upgrades and modifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the off-road motorcycle frame of the present utility model;

[0022] Figure 2 This is a schematic diagram of the main structure of the off-road motorcycle frame of the present invention;

[0023] Figure 3 This is a schematic diagram of the main structure of the off-road motorcycle of the present invention.

[0024] Markings in the figure: bent main beam 1, bent portion 11, first support plate 2, second support plate 3, front bracket plate 4, engine bent pipe frame 5, support pipe 6, tail frame 7, first mounting part 8, second mounting part 9, engine 10, fuel tank 12. DETAILED DESCRIPTION

[0025] See also Figure 1-3 , further illustrate the embodiments of the present utility model;

[0026] like Figure 1 and 2 As shown, a split-type lightweight, high-strength off-road motorcycle frame includes an engine curved tube frame 5 and a tailstock 7 mounted on the engine curved tube frame 5; further comprising a bent main beam 1 fixed above the engine curved tube frame 5, a reinforcement member mounted between the bent main beam 1 and the engine curved tube frame 5, and two front bracket plates 4 mounted within the engine curved tube frame 5 and away from the tailstock 7. The tailstock 7 is detachably connected to the lower end of the bent main beam 1 and the outer wall of the engine curved tube frame 5.

[0027] The off-road motorcycle includes an engine 10 and a fuel tank 12. The engine 10 is installed in the engine curved tube frame 5. The fuel tank 12 is installed above the engine 10 and below the curved main beam 1.

[0028] In this solution, the engine bend tube frame 5 is used to support and fix the engine 10, and the engine 10 is bolted to the two front bracket plates 4. Compared with the traditional cradle-type frame, this application replaces the subframe of the traditional cradle-type frame by adding two lighter front bracket plates 4, which reduces the number of parts and the number of frame welding points. It can achieve the rigidity of the traditional cradle-type frame and the convenient assembly of the front bracket plates 4, and can effectively reduce the weight of the motorcycle frame and reduce its manufacturing cost. With the use of the two front bracket plates 4, the connection between the engine 10 and the engine bend tube frame 5 is more compact and the fixation is more compact, which can effectively suppress vibration to a certain extent.

[0029] In addition, the present application also adjusts the main beam of the traditional single-beam off-road vehicle frame. First, a bent main beam 1 is adopted. By increasing the bending amount of the main beam, the installation space of the fuel tank 12 is expanded. For example, a plurality of bent portions 11 from top to bottom are provided on the bent main beam 1. In the present application, two bent portions 11 are preferably provided. The lower end of the upper side of the engine curved tube frame 5 is welded to the lower bent portion 11.

[0030] Secondly, by adding reinforcements to strengthen the effective load-bearing section of the vehicle, the torsional characteristics of the vehicle are enhanced, and the rigidity and strength are also increased. Specifically, the reinforcement includes a first support plate 2 and a second support plate 3. The first support plate 2 is welded to the angle between the bent main beam 1 and the engine bent tube frame 5, which can enhance the firmness and effective load-bearing section of the angle between the bent main beam 1 and the engine bent tube frame 5, and the lowest point on the upper side of the first support plate 2 extends to the uppermost bending portion 11 of the bent main beam 1, which can enhance the anti-torsion characteristics of the bent main beam 1. Torsional characteristics, rigidity and strength, the second support plate 3 is welded to the lower angle between the bent main beam 1 and the engine bent tube frame 5, which can strengthen the firmness and effective load-bearing section of the lower angle between the bent main beam 1 and the engine bent tube frame 5; the reinforcement also includes a support tube 6, which is welded to the lower side of the first support plate 2 and welded to one of the bent portions 11. The first support plate 2, the support tube 6 and the bent main beam 1 form a triangle, which can further strengthen the connection strength and effective load-bearing section between the bent main beam 1 and the engine bent tube frame 5;

[0031] Third, the tailstock 7 is assembled, making it easy to upgrade and modify later. Specifically, a first mounting member 8 is fixed to the lower end of the curved main beam 1, and second mounting members 9 are fixed to both sides of the outer wall of the engine elbow frame 5 near the tailstock 7. The tailstock 7 is bolted to the first mounting member 8 and the two second mounting members 9. When the tailstock 7 needs to be upgraded and modified, the bolts on the first mounting member 8 and the two second mounting members 9 are removed. The tailstock 7 can then be separated from the curved main beam 1 and the engine elbow frame 5. Finally, the upgraded tailstock 7 is bolted to the first mounting member 8 and the two second mounting members 9 to complete the installation. To further reduce the weight of the entire vehicle, the tailstock 7 can be manufactured from lightweight materials, such as carbon fiber, aluminum alloy, titanium alloy, and other lightweight materials with high strength and rigidity and low density.

[0032] The present invention also provides an off-road motorcycle, comprising the above-mentioned split lightweight high-strength off-road motorcycle frame, an engine 10 and a fuel tank 12, the engine 10 being installed in the engine curved tube frame 5, and the engine 10 being bolted to the two front bracket plates 4, and the fuel tank 12 being installed above the engine 10 and below the bent main beam 1; compared with the prior art, the bending amount of the bent main beam 1 is increased, and a large-volume fuel tank can be installed, and the strength of the bent main beam 1 and the engine curved tube frame 5 is strengthened by reinforcement pieces; the frame is lightweight, and the two front bracket plates 4 replace the sub-frame of the traditional cradle-type frame, with fewer parts, simple assembly, light weight, and low manufacturing cost; the engine 10 is fixed compactly in the engine curved tube frame 5, with a small reserved gap, which effectively suppresses the vibration and jitter of the entire vehicle; the tail frame 7 is assembled and installed, which can be convenient for later upgrading and modification; in addition, the engine curved tube frame 5 is 300 mm from the ground, and the ultra-high ground clearance makes the off-road motorcycle have strong passability.

Claims

1. A split-type lightweight high-strength off-road motorcycle frame, comprising an engine curved tube frame (5) and a tail frame (7) mounted on the engine curved tube frame (5), characterized in that: The invention also comprises a bent main beam (1) fixed above the engine bent tube frame (5), a reinforcement member installed between the bent main beam (1) and the engine bent tube frame (5), and two front bracket plates (4) installed in the engine bent tube frame (5) and away from the side of the tail frame (7); the tail frame (7) is detachably connected to the lower end of the bent main beam (1) and the two sides of the outer wall of the engine bent tube frame (5).

2. The split-type lightweight high-strength off-road motorcycle frame according to claim 1, characterized in that: The bent main beam (1) is provided with a plurality of bent portions (11) extending from top to bottom, and the upper lower end of the engine bent pipe frame (5) is welded to the lowermost bent portion (11).

3. The split-type lightweight high-strength off-road motorcycle frame according to claim 2, characterized in that: The reinforcement comprises a first support plate (2) and a second support plate (3); the first support plate (2) is welded to an upper angle between the bent main beam (1) and the engine bent tube frame (5); and the second support plate (3) is welded to a lower angle between the bent main beam (1) and the engine bent tube frame (5).

4. The split-type lightweight high-strength off-road motorcycle frame according to claim 3, characterized in that: The lowest point on the upper side of the first support plate (2) extends to the uppermost bent portion (11) of the bent main beam (1).

5. The split-type lightweight and high-strength off-road motorcycle frame according to claim 3, characterized in that: The reinforcement member further comprises a support tube (6), wherein the support tube (6) is welded to the lower side of the first support plate (2) and welded to one of the bent portions (11).

6. The split-type lightweight high-strength off-road motorcycle frame according to claim 5, characterized in that: The first support plate (2), the support tube (6) and the bent main beam (1) form a triangle.

7. The split-type lightweight and high-strength off-road motorcycle frame according to claim 1, characterized in that: A first mounting member (8) is fixed to the lower end of the bent main beam (1), and second mounting members (9) are fixed to both sides of the outer wall of the engine bent pipe frame (5) close to the tail frame (7), and the tail frame (7) is bolted to the first mounting member (8) and the two second mounting members (9).

8. The split-type lightweight and high-strength off-road motorcycle frame according to claim 1, characterized in that: The tailstock (7) is made of lightweight materials.

9. An off-road motorcycle, characterized in that: The invention comprises a split-type lightweight high-strength off-road motorcycle frame according to any one of claims 1 to 8, an engine (10) and a fuel tank (12), wherein the engine (10) is installed in an engine bent tube frame (5), and the engine (10) is bolted to the two front bracket plates (4), and the fuel tank (12) is installed above the engine (10) and below the bent main beam (1).

10. The off-road motorcycle according to claim 9, characterized in that: The engine bent pipe frame (5) is 300 mm away from the ground.

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