Front frame of two-wheeled vehicle

Abstract

The utility model discloses a front frame of a two-wheeled vehicle, which comprises a front frame and a head tube which can be detached from each other, the front end of the front frame comprises an upper clamping tongue and a lower clamping tongue which extend forwards, and an upper clamping seat and a lower clamping seat are fixed at the upper part and the lower part of the rear part of the head tube; bayonets are formed in the rear sides of the upper clamping seat and the lower clamping seat, and the upper clamping tongue and the lower clamping tongue are clamped into the bayonets in the upper clamping seat and the lower clamping seat respectively and are locked through locking pieces; the anti-shearing capability of the locking piece of the detachable head pipe can be improved.

Description

Technical Field

[0001] The utility model belongs to the field of two-wheel vehicle frames. Background Art

[0002] Generally, the head tube of a two-wheel bicycle is connected to the front frame (down tube) by welding. The welding method is not only not conducive to modular production and product consistency during the factory production of the vehicle frame, but also not conducive to classified transportation. At the same time, when the front wheel is jolted, after the front wheel receives the impact force from the ground, it will transmit to the head tube, causing the head tube to fluctuate violently up and down. The weak part of the weld at the head tube is likely to form small cracks, thus affecting its strength.

[0003] If the head tube and the front frame (down tube) are detachably connected by using locking bolts, although there will be no crack phenomenon like the welding process, and it is conducive to classified transportation and improving product consistency, when the front wheel is jolted, after the front wheel receives the impact force from the ground, it will transmit to the head tube, causing the head tube to fluctuate violently up and down. As a result, the bolts at the bolt connection between the head tube and the front frame (down tube) will be subjected to very strong shear forces, thus posing a risk of bolt damage.

[0004] In addition to the above core technical problems, the battery of this two-wheel assisted bicycle also has problems such as heat dissipation and theft. Summary of the Invention

[0005] Object of the Invention: In order to overcome the deficiencies in the prior art, the utility model provides a front frame for a two-wheel vehicle, which can improve the anti-shear ability of the locking member of the detachable head tube.

[0006] Technical Solution: To achieve the above object, a front frame for a two-wheel vehicle of the utility model includes a front frame and a head tube that can be detachably connected to each other. The front end of the front frame includes an upper tongue and a lower tongue extending forward. An upper seat and a lower seat are fixedly arranged up and down at the rear of the head tube. There are bayonets on the rear sides of the upper seat and the lower seat. The upper tongue and the lower tongue are respectively inserted into the bayonets on the upper seat and the lower seat, and are locked by a locking member.

[0007] Furthermore, there are threaded locking holes on both sides of the upper tongue and the lower tongue; there are bolt through holes at both ends of the bayonets of the upper seat and the lower seat; the threaded locking holes at both ends of the upper tongue and the lower tongue are aligned with the bolt through holes at both ends of the bayonets into which they are inserted, and are locked by locking bolts at both ends.

[0008] Furthermore, the front frame includes a down tube, a parallel beam a, and a parallel beam b; the parallel beam a and the parallel beam b are parallel to both sides above the down tube; a strip-shaped battery is arranged in a parallel constraint manner within the cage structure formed by enclosing the down tube, the parallel beam a, and the parallel beam b, and the strip-shaped battery can move along the length direction of the front frame.

[0009] Further, the front ends of the a parallel beam and the b parallel beam are integrally connected by a connecting arm, and the root of the upper tongue is fixedly connected to the connecting arm.

[0010] Further, the root of the lower tongue is fixedly connected to the front end of the lower tube.

[0011] Further, the lower tube and the a parallel beam are supported and connected to each other by a number of a structural frames; the lower tube and the b parallel beam are supported and connected to each other by a number of b structural frames, and the two side surfaces of the strip battery are in limiting contact with the a structural frame and the b structural frame.

[0012] Beneficial effects: The utility model not only meets the characteristics of the detachable head tube and convenient transportation during factory production, but also enables the two-wheeled vehicle to calmly cope with the situation of the front wheel being jolted through the structure of the tongue being snapped in and then locked. When the front wheel is jolted, after the front wheel receives the impact force from the ground, it will be transmitted to the head tube, causing the head tube to fluctuate violently up and down. Since the upper tongue and the lower tongue are respectively snapped into the clamping openings on the upper clamping seat and the lower clamping seat, during the violent up and down fluctuation of the head tube, the up and down fluctuations of the upper clamping seat and the lower clamping seat are directly and rigidly transmitted to the upper tongue and the lower tongue, thus avoiding directly transmitting to the locking bolts at the connection between the front frame and the head tube and preventing the problem that the locking bolts at the connection between the front frame and the head tube are broken due to severe shear force. Description of the Drawings

[0013] Figure 1 is a first perspective view of this solution;

[0014] Figure 2 is a second perspective view of this solution. Detailed Embodiment

[0015] The following further describes the present utility model in conjunction with the drawings.

[0016] As shown in the attached Figure 1 and 2 A two-wheeled vehicle front frame shown, including a detachable front frame 4 and a head tube 11. The front end of the front frame 4 includes an upper tongue 9 and a lower tongue 10 extending forward. The upper and lower parts of the rear of the head tube 11 are fixedly provided with an upper clamping seat 41 and a lower clamping seat 13; there are clamping openings 30 on the rear sides of the upper clamping seat 41 and the lower clamping seat 13. The upper tongue 9 and the lower tongue 10 are respectively snapped into the clamping openings 30 on the upper clamping seat 41 and the lower clamping seat 13 and are locked by a locking member; there are threaded locking holes on both sides of the upper tongue 9 and the lower tongue 10; there are bolt through holes at both ends of the clamping openings 30 of the upper clamping seat 41 and the lower clamping seat 13; the threaded locking holes at both ends of the upper tongue 9 and the lower tongue 10 are aligned with the bolt through holes at both ends of the clamping openings 30 they are snapped into and are locked by the locking bolts at both ends.

[0017] Under the above structure, not only the detachable and easy-to-transport characteristics of the head tube 11 are satisfied, but also the structure of clamping and then locking by the clamping tongues enables the two-wheeled vehicle to calmly cope with the situation where the front wheel is jolted. When the front wheel is jolted, after the front wheel receives the impact force from the ground, it will be transmitted to the head tube, causing the head tube to fluctuate violently up and down. Since the upper clamping tongue 9 and the lower clamping tongue 10 are respectively clamped into the bayonets 30 on the upper clamping seat 41 and the lower clamping seat 13, during the violent up-and-down fluctuation of the head tube, the up-and-down fluctuations of the upper clamping seat 41 and the lower clamping seat 13 are directly and rigidly transmitted to the upper clamping tongue 9 and the lower clamping tongue 10, thus avoiding directly transmitting to the locking bolts at the connection between the front frame 4 and the head tube 11 and avoiding the problem that the locking bolts at the connection between the front frame 4 and the head tube 11 are broken due to severe shear force.

[0018] To enhance its structural strength and lightweight requirements, the following structure is designed: The front frame 4 includes a lower tube 1, a parallel beam 2 and a b parallel beam 3; the a parallel beam 2 and the b parallel beam 3 are parallel to both sides above the lower tube 1; the front ends of the a parallel beam 2 and the b parallel beam 3 are integrally connected by a connecting arm 7, and the root of the upper clamping tongue 9 is fixedly connected to the connecting arm 7; the root of the lower clamping tongue 10 is fixedly connected to the front end of the lower tube 1.

[0019] A strip-shaped battery 21 is arranged in parallel and constrained within the cage structure formed by enclosing the lower tube 1, the a parallel beam 2 and the b parallel beam 3. The lower tube 1 and the a parallel beam 2 are supported and connected to each other by a number of a structural frames 6; the lower tube 1 and the b parallel beam 3 are supported and connected to each other by a number of b structural frames 5. The two side surfaces of the strip-shaped battery 21 are in limiting contact with the a structural frames 6 and the b structural frames 5; under the common constraint of the lower tube 1, the a parallel beam 2 and the b parallel beam 3, the strip-shaped battery 21 can only move along the length direction of the front frame 4, so that it can be designed that the strip-shaped battery 21 can only be removed after the head tube 11 is disassembled, thus playing a role in battery anti-theft.

[0020] It also includes a seat tube 14. The lower end of the seat tube 14 is fixedly connected to the bottom bracket seat 18, and the rear end of the lower tube 1 is fixedly connected to the bottom bracket seat 18. A transverse structural column 16 is fixedly welded horizontally in the middle of the seat tube 14; both sides at the bottom end of the lower tube 1 are supported and connected to both ends of the transverse structural column 16 by two symmetrically arranged left and right a support arms 17; the rear ends of the a parallel beam 2 and the b parallel beam 3 are respectively fixedly connected to the middle parts of two b support arms 15, and both ends of each b support arm 15 are respectively fixedly connected to the transverse structural column 16 and the lower tube 1; a battery socket 19 is installed between the two b support arms 15, and a plug 20 matched with the battery socket 19 is arranged at the lower oblique end of the strip-shaped battery 21. The periphery of the strip-shaped battery 21 is not only jointly protected by the lower tube 1, the a parallel beam 2, the b parallel beam 3, the a structural frames 6 and the b structural frames 5 to ensure its structural safety and anti-theft ability, but also the two sides of the strip-shaped battery 21 are exposed to the air. During the riding process, cooling air flows will be formed on both sides of the strip-shaped battery 21 under the action of the oncoming wind pressure, thus playing a forced air cooling effect during the riding process.

[0021] The above are only the preferred embodiments of the present utility model. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present utility model.

Claims

1. A two-wheeled vehicle front frame, characterized in that: The invention comprises a front frame (4) and a head pipe (11) which are detachable from each other. The front end of the front frame (4) comprises an upper latching tongue (9) and a lower latching tongue (10) extending forward. The rear part of the head pipe (11) is fixed with an upper latching seat (41) and a lower latching seat (13) at the upper and lower parts. The rear sides of the upper latching seat (41) and the lower latching seat (13) are both provided with a latching hole (30). The upper latching tongue (9) and the lower latching tongue (10) are respectively latched into the latching holes (30) on the upper latching seat (41) and the lower latching seat (13) and locked by a locking member.

2. A two-wheeled vehicle front frame according to claim 1, characterized in that: Both sides of the upper latch tongue (9) and the lower latch tongue (10) are provided with threaded locking holes; both ends of the bayonet (30) of the upper clamping seat (41) and the lower clamping seat (13) are provided with bolt through holes; the threaded locking holes at both ends of the upper latch tongue (9) and the lower latch tongue (10) are aligned with the bolt through holes at both ends of the bayonet (30) and are locked by the locking bolts at both ends.

3. A two-wheeled vehicle front frame according to claim 2, characterized in that: The front frame (4) comprises a lower tube (1), a parallel beam a (2) and a parallel beam b (3); the parallel beam a (2) and the parallel beam b (3) are parallel to the upper sides of the lower tube (1); a strip battery (21) is arranged in parallel and restrained in a cage structure formed by the lower tube (1), the parallel beam a (2) and the parallel beam b (3); the strip battery (21) can move along the length direction of the front frame (4).

4. A two-wheeled vehicle front frame according to claim 3, characterized in that: The front ends of the a parallel beam (2) and the b parallel beam (3) are integrally connected via a connecting arm (7), and the root of the upper latch tongue (9) is fixedly connected to the connecting arm (7).

5. A two-wheeled vehicle front frame according to claim 4, characterized in that: The root of the lower latch tongue (10) is fixedly connected to the front end of the lower tube (1).

6. A two-wheeled vehicle front frame according to claim 5, characterized in that: The lower tube (1) and the a-parallel beam (2) are mutually supported and connected via a plurality of a-structure frames (6); the lower tube (1) and the b-parallel beam (3) are mutually supported and connected via a plurality of b-structure frames (5), and the two side surfaces of the strip-shaped battery (21) are limitedly contacted with the a-structure frame (6) and the b-structure frame (5).

Images