A motorcycle frame

Abstract

The utility model provides a kind of motorcycle frame, belong to motorcycle technical field.It includes the tap pipe of inclination arrangement, the bottom welding of tap pipe middle part has main girder pipe, the bottom of main girder pipe is curved to the direction of vehicle body, the rear side of main girder pipe is provided with the vehicle body pipe of integrally formed and is U-shaped, the U-shaped open end portion of vehicle body pipe is curved and is welded on the left and right side wall of main girder pipe, the left and right sides structure of vehicle body pipe is same, vehicle body pipe sequentially includes and is welded with the side support pipe of main girder pipe side wall from front to back, pedal support pipe, frame diagonal bracing pipe and installation cross pipe, the rear end between two side support pipes is provided with first reinforcing cross pipe fixed in the bottom of main girder pipe, two pedal support pipes are fixed with second reinforcing cross pipe, the third reinforcing cross pipe of middle part is provided with forward bulge between two frame diagonal bracing pipes.The utility model has less welding connection, and structural strength is strong, prolongs service life.

Description

Technical Field

[0001] This utility model belongs to the field of motorcycle technology, and specifically refers to a motorcycle frame. Background Technology

[0002] The motorcycle frame is the core skeletal structure of a motorcycle. Its primary function is to support and connect the engine, suspension system, steering mechanism, running gear, and other components, and to withstand various static and dynamic loads from the road surface and the vehicle itself. Therefore, the structural design of the frame directly determines the overall structural strength, stability, and safety of the motorcycle.

[0003] Traditional motorcycle frames, whether cradle-type, diamond-type, or spine-type, are typically assembled from multiple main beams connected by welding, riveting, or bolting. This method results in relatively poor structural strength at the connection points between the beams, making them prone to fatigue damage over long-term use and posing safety hazards. Furthermore, the assembly of multiple components demands high manufacturing precision, and the complex welding process increases the difficulty of production and costs. Utility Model Content

[0004] The purpose of this utility model is to provide a motorcycle frame with fewer welded joints between its integral tubular components, resulting in higher structural strength and a longer service life.

[0005] The purpose of this utility model is achieved as follows: A motorcycle frame includes an inclined handlebar tube, a main beam tube welded to the bottom of the middle part of the handlebar tube, the bottom of the main beam tube bending towards the body, and an integrally formed U-shaped body tube provided on the rear side of the main beam tube. The U-shaped opening ends of the body tube are bent towards each other and welded to the left and right side walls of the main beam tube. The left and right sides of the body tube have the same structure. The body tube includes, from front to back, a side support tube welded to the side wall of the main beam tube, a foot pedal support tube, a frame diagonal support tube, and a mounting cross tube. A first reinforcing cross tube fixed to the bottom of the main beam tube is provided between the rear ends of the two side support tubes, a second reinforcing cross tube is fixed between the two foot pedal support tubes, and a third reinforcing cross tube with a forward-protruding middle is provided between the two frame diagonal support tubes.

[0006] The present invention is further configured such that a multi-functional mounting bracket is fixed on the two mounting horizontal tubes. The multi-functional mounting bracket includes an integrally formed mounting top plate and a mounting side plate. An inner fixing plate is folded onto the mounting side plate and bolted to the upper end face of the mounting horizontal tube. Several mounting screw holes are provided on both the mounting top plate and the mounting side plate.

[0007] The present invention is further configured such that a connecting side ear is fixed at the bottom of the outer side of the mounting side plate, and the bottom of the connecting side ear is bolted to the bottom of the mounting horizontal tube.

[0008] The present invention is further configured such that a horizontally placed seat frame is welded to the middle of the third reinforcing horizontal tube.

[0009] The present invention is further configured such that a reinforcing angle plate is fixed between the third reinforcing cross tube and the frame diagonal brace tube.

[0010] The present invention is further configured such that a longitudinal mounting plate is welded between the rear frame diagonal support tubes of the pedal support tube, and the second reinforcing cross tube is fixed between the two longitudinal mounting plates.

[0011] The present invention is further configured such that a pedal mounting plate is fixed to the top of the pedal support tube.

[0012] The present invention is further configured such that an arc-shaped plate is provided on the side of the side support tube near the main beam tube, which is in contact with the wall of the main beam tube, and the inner wall of the arc-shaped plate is welded to the inner wall of the main beam tube.

[0013] The outstanding and beneficial technical effects of this utility model compared to the prior art are: 1. The motorcycle frame provided by this utility model adopts an integrally molded U-shaped body tube to form a continuous and complete structural frame, eliminating the traditional multi-welded frame structure, effectively distributing the load evenly to the entire frame, and improving the structural strength of the frame; the design of multiple reinforcing cross tubes forms multiple stable structures, effectively preventing the frame from deforming.

[0014] 2. The multi-functional mounting bracket provided by this utility model can fix the tail box and the fuel tank, and its fixing method is simple. The provided mounting holes and screw holes are convenient for fixing the vehicle body shell. The provided connecting side lugs can enhance the connection strength between the multi-functional mounting bracket and the mounting cross tube.

[0015] 3. This utility model further welds the seat bucket frame directly onto the third reinforcing cross tube in the middle of the frame, making full use of the load-bearing capacity of the reinforced structure without the need for additional support rods; and uses reinforcing corner plates to further enhance the structural strength.

[0016] 4. This utility model adopts a combination of a longitudinal mounting plate and a second reinforcing transverse tube to form a "I"-shaped or box-shaped reinforcing structure between the two pedal support tubes, which greatly improves the lateral rigidity of the lower part of the frame.

[0017] 5. The arc-shaped plate design adopted in this utility model enables large-area contact between the main beam tube and the side support tube, enhancing structural strength and ensuring service life. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ; Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ; Figure label: 1-Dragon head pipe; 2-Main beam pipe; 3-Body frame tube; 30-Side support tube; 300-Curved plate; 31-Foot pedal support tube; 32-Frame diagonal support tube; 33-Mounting cross tube; 34-Longitudinal mounting plate; 35-Foot pedal mounting plate; 4-First reinforcing horizontal tube; 5-Second reinforcing horizontal tube; 6-Third reinforcing horizontal tube; 60-Bug holder frame; 61-Reinforcing corner plate; 7-Multi-functional mounting bracket; 70-Top mounting plate; 71-Side mounting plate; 72-Inner fixing plate; 73-Connecting side lugs. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. See also: Figure 1 — Figure 2 : A motorcycle frame includes an inclined handlebar tube 1, a main beam tube 2 welded to the bottom of the middle part of the handlebar tube 1, the bottom of the main beam tube 2 bending towards the body, and an integrally formed U-shaped body tube 3 provided on the rear side of the main beam tube 2. The U-shaped opening ends of the body tube 3 are bent towards each other and welded to the left and right side walls of the main beam tube 2. The left and right sides of the body tube 3 have the same structure. The body tube 3 includes, from front to back, a side support tube 30 welded to the side wall of the main beam tube 2, a pedal support tube 31, a frame diagonal support tube 32, and a mounting cross tube 33. A first reinforcing cross tube 4 fixed to the bottom of the main beam tube 2 is provided between the rear ends of the two side support tubes 30, a second reinforcing cross tube 5 is fixed between the two pedal support tubes 31, and a third reinforcing cross tube 6 with a forward protrusion in the middle is provided between the two frame diagonal support tubes 32.

[0020] During the manufacturing process, the head tube 1 and the main beam tube 2 are welded first, then the front end of the integrally formed body tube 3 is effectively welded, and then the first reinforcing horizontal tube, the second reinforcing horizontal tube and the third reinforcing horizontal tube are welded to complete the motorcycle frame.

[0021] The body tubes are integrally formed by bending the tubes, resulting in a strong overall structure that eliminates the need for traditional multi-welded frame structures. Combined with multiple reinforcing cross tubes, it prevents the frame from deforming.

[0022] Preferably, a multi-functional mounting bracket 7 is fixed on the two mounting horizontal tubes 33. The multi-functional mounting bracket 7 includes an integrally formed mounting top plate 70 and a mounting side plate 71. An inner fixing plate 72 is folded on the mounting side plate 71. The inner fixing plate 72 is bolted to the upper end face of the mounting horizontal tube 33. Several mounting screw holes are provided on both the mounting top plate 70 and the mounting side plate 71.

[0023] In the above structure, the multi-functional mounting bracket 7 secures the tail box and fuel tank. At the same time, the mounting bracket is easy to assemble and can be installed by means of bolts.

[0024] Preferably, a connecting lug 73 is fixed to the bottom of the outer side of the mounting side plate 71, and the bottom of the connecting lug 73 is bolted to the bottom of the mounting horizontal tube 33. The connecting lug 73 further enhances the connection strength with the mounting horizontal tube 33. Preferably, a horizontally placed seat bucket frame 60 is welded to the middle of the third reinforcing horizontal tube 6, and a reinforcing angle plate 61 is fixed between the third reinforcing horizontal tube 6 and the frame diagonal brace tube 32.

[0025] In the above structure, the bucket frame is welded to the third reinforcing tube 6, making full use of the load-bearing capacity of the reinforcing structure, and the structural strength of the third reinforcing tube 6 is further enhanced by using reinforcing corner plates 61, ensuring that the bucket frame has sufficient support capacity.

[0026] Preferably, a longitudinal mounting plate 34 is welded between the rear end of the pedal support tube 31 and the frame diagonal support tube 32, and the second reinforcing horizontal tube 5 is fixed between the two longitudinal mounting plates 34.

[0027] In the above structure, the second reinforcing transverse tube 5 is fixed to the longitudinal mounting plates 34 on both sides of the frame to enhance the overall structural strength and improve the lateral rigidity of the lower part of the frame.

[0028] Preferably, a pedal mounting plate 35 is fixed to the top of the pedal support tube 31. This facilitates the fixed installation of the top plastic pedal.

[0029] Preferably, the side support tube 30 is provided with an arc-shaped plate 300 that fits against the wall of the main beam tube 2 on the side near the main beam tube 2, and the inner wall of the arc-shaped plate 300 is welded to the inner wall of the main beam tube 2. This achieves a large contact area between the main beam tube and the side support tube, increases the welding area, improves structural strength, and ensures service life.

[0030] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A motorcycle frame, characterized in that, The system includes a tilted head tube (1), a main beam tube (2) welded to the bottom of the middle part of the head tube (1), the bottom of the main beam tube (2) bends towards the vehicle body, and a U-shaped body tube (3) is integrally formed on the rear side of the main beam tube (2). The U-shaped opening ends of the body tube (3) bend towards each other and are welded to the left and right side walls of the main beam tube (2). The left and right sides of the body tube (3) have the same structure. The body tube (3) includes, from front to back, a side support tube (30), a pedal support tube (31), a frame diagonal support tube (32), and a mounting cross tube (33) welded to the side wall of the main beam tube (2). A first reinforcing cross tube (4) fixed to the bottom of the main beam tube (2) is provided between the rear ends of the two side support tubes (30). A second reinforcing cross tube (5) is fixed between the two pedal support tubes (31). A third reinforcing cross tube (6) with a forward protrusion in the middle is provided between the two frame diagonal support tubes (32).

2. A motorcycle frame according to claim 1, characterized in that, A multi-functional mounting bracket (7) is fixed on the two mounting horizontal tubes (33). The multi-functional mounting bracket (7) includes an integrally formed mounting top plate (70) and a mounting side plate (71). An inner fixing plate (72) is folded on the mounting side plate (71). The inner fixing plate (72) is bolted to the upper end face of the mounting horizontal tube (33). Several mounting screw holes are provided on both the mounting top plate (70) and the mounting side plate (71).

3. A motorcycle frame according to claim 2, characterized in that, A connecting lug (73) is fixed to the bottom of the outer side of the mounting side plate (71), and the bottom of the connecting lug (73) is bolted to the bottom of the mounting horizontal tube (33).

4. A motorcycle frame according to claim 1, characterized in that, A horizontally placed bucket frame (60) is welded to the middle of the third reinforcing horizontal tube (6).

5. A motorcycle frame according to claim 4, characterized in that, A reinforcing angle plate (61) is fixed between the third reinforcing horizontal tube (6) and the frame diagonal brace tube (32).

6. A motorcycle frame according to claim 1, characterized in that, A longitudinal mounting plate (34) is welded between the rear end of the pedal support tube (31) and the frame diagonal support tube (32), and the second reinforcing horizontal tube (5) is fixed between the two longitudinal mounting plates (34).

7. A motorcycle frame according to claim 1, characterized in that, The pedal support tube (31) is fixed with a pedal mounting plate (35) at its top.

8. A motorcycle frame according to claim 1, characterized in that, The side support tube (30) is provided with an arc-shaped plate (300) that fits against the wall of the main beam tube (2) on the side close to the main beam tube (2), and the inner wall of the arc-shaped plate (300) is welded to the inner wall of the main beam tube (2).

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