A bicycle frame and a bicycle

Abstract

This utility model discloses a bicycle frame and a bicycle. The bicycle frame includes a front frame and a rear frame. The front frame includes a crossbeam, head tube, bottom tube, slant tube, positioning lugs, and pedal arm mounting seats. The head tube is welded to the front end of the crossbeam, and connecting sleeves are welded to both sides of the crossbeam near the rear end. The rear end of the crossbeam is welded to the upper part of the bottom tube. The upper end of the slant tube is welded to the part of the crossbeam near the rear end, and the lower end is welded to the lower part of the bottom tube. The positioning lugs are welded to the bottom tube, and pedal arm mounting seats are welded to the lower end of the bottom tube. The rear frame includes a right rear fork tube, a right rear fork tailplate, a left rear fork tube, a left rear fork tailplate, and a second transition pulley. First transition pulleys are installed in the grooves at the front ends of the right and left rear fork tubes, and the first transition pulleys are connected to the connecting sleeves by fixing screws. This utility model's frame adopts a two-part design, which can effectively reduce processing costs, packaging costs, and transportation costs.

Description

Technical Field

[0001] This utility model relates to the field of bicycles, specifically to a bicycle frame and a bicycle. Background Technology

[0002] A bicycle is a two-wheeled mode of transportation, consisting of a frame, two wheels, two pedals, and a chain. It can be ridden manually, requiring no fuel, making it a green and healthy mode of transportation. Bicycles have wide applications in transportation, sports, and recreation, and are often referred to as "a crystallization of human ingenuity." There are many types of bicycles, including touring bikes, road bikes, mountain bikes, and folding bikes.

[0003] Patent publication number CN 219565380 U discloses a steel wire rope traction variable torque bicycle. However, the bicycle frame is an integral structure, which is relatively heavy, resulting in low production and assembly efficiency and high packaging and transportation costs. Therefore, there is still much room for optimization. Summary of the Invention

[0004] The purpose of this utility model is to provide a bicycle frame and bicycle that overcomes the shortcomings of the prior art.

[0005] The technical solution of this utility model:

[0006] A bicycle frame, comprising:

[0007] Front frame and rear frame;

[0008] The front frame includes crossbeams, head tube, center tube, diagonal brace tubes, positioning lugs, and footarm mounting brackets;

[0009] The head tube is welded and fixed to the front end of the crossbeam. Connecting sleeves are welded to both sides of the crossbeam near the rear end. The rear end of the crossbeam is welded to the upper part of the middle tube. The upper end of the diagonal brace tube is welded to the part of the crossbeam near the rear end, and the lower end is welded to the lower part of the middle tube. The positioning lug is welded to the middle tube, and the lower end of the middle tube is welded to the foot arm mounting seat.

[0010] The rear frame includes the right rear fork tube, the right rear fork tailplate, the left rear fork tube, the left rear fork tailplate, and a second transition fixed pulley;

[0011] The right rear fork tube and the left rear fork tube are connected to the crossbeam through connecting sleeves. The right rear fork tail plate and the left rear fork tail plate are welded to the outer rear end of the right rear fork tube and the left rear fork tube, respectively. A rear fork tube connecting positioning component is welded between the right rear fork tube and the left rear fork tube. The rear fork tube connecting positioning component has a rear mudguard mounting hole and a bolt upper hole. The positioning lug has a bolt lower hole. The two ends of the second transition fixed pulley axle are connected to the bolt upper hole and the bolt lower hole, respectively.

[0012] The right rear fork tube and the front end of the left rear fork tube are respectively equipped with a first transition fixed pulley, and the first transition fixed pulley is connected to the connecting sleeve by a fixing screw.

[0013] Furthermore, steel wire rope through holes are opened on both sides of the crossbeam near both ends, and single stop bolts are welded on both sides of the crossbeam near the front end.

[0014] Furthermore, double stop bolts are welded to both sides of the crossbeam near the rear end.

[0015] Furthermore, a rivet nut is riveted to the front side of the middle part of the diagonal brace tube.

[0016] This utility model also provides a bicycle, including: the above-mentioned bicycle frame.

[0017] Compared to CN 219565380 U, this utility model adopts a two-part design for the frame, making the frame lighter and easier to produce and assemble. It also reduces the volume of the packaging box, making the packaging box one-third smaller when packaging the whole vehicle, which can effectively reduce processing costs, packaging costs and transportation costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a preferred embodiment of the present utility model;

[0019] Figure 2 This is another structural schematic diagram of a preferred embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of this utility model installed on a bicycle;

[0021] In the diagram: 1. Front frame; 2. Rear frame; 3. Crossbeam; 4. Head tube; 5. Center tube; 6. Diagonal brace tube; 7. Positioning lug; 8. Connecting sleeve; 9. Footarm mounting seat; 10. Right rear fork tube; 11. Right rear fork tailplate; 12. Left rear fork tube; 13. Left rear fork tailplate; 14. First transition fixed pulley; 15. Second transition fixed pulley; 16. Rear fork tube connecting positioning piece; 17. Rear mudguard mounting hole; 18. Wire rope through hole; 19. Single stop bolt; 20. Double stop bolt; 21. Rivet nut. Detailed Implementation

[0022] The present invention can be further described through the following embodiments; however, the scope of the present invention is not limited to the following embodiments. It should be understood that the embodiments described herein are disclosed by way of illustration only, and the present invention is not intended to limit its scope to the details of the construction and arrangement of the components described below or illustrated in the figures. Furthermore, in describing preferred embodiments, specific terminology will be used for clarity. It should be understood that each specific term includes: all technical equivalents that operate in a similar manner to achieve a similar purpose.

[0023] Example: Please refer to Figure 1 and Figure 2 As shown, a bicycle frame includes:

[0024] Front frame 1 and rear frame 2;

[0025] The front frame 1 includes a crossbeam 3, a head tube 4, a middle tube 5, a diagonal brace tube 6, a positioning lug 7, and a foot arm mounting bracket 9;

[0026] The head tube 4 is welded and fixed to the front end of the crossbeam 3. Connecting sleeves 8 are welded to both sides of the crossbeam 3 near the rear end. The rear end of the crossbeam 3 is welded to the upper part of the middle tube 5. The upper end of the diagonal brace tube 6 is welded to the part of the crossbeam 3 near the rear end, and the lower end is welded to the lower part of the middle tube 5. The positioning lug 7 is welded to the middle tube 5, and the lower end of the middle tube is welded to the foot arm mounting seat 9.

[0027] The rear frame 2 includes a right rear fork tube 10, a right rear fork tailplate 11, a left rear fork tube 12, a left rear fork tailplate 13, and a second transition fixed pulley 15.

[0028] The right rear fork tube 10 and the left rear fork tube 12 are respectively connected to the crossbeam 3 through the connecting sleeve 8. The right rear fork tail plate 11 and the left rear fork tail plate 13 are respectively welded to the outer rear end of the right rear fork tube 10 and the left rear fork tube 12. A rear fork tube connecting positioning component 16 is welded between the right rear fork tube 10 and the left rear fork tube 12. The rear fork tube connecting positioning component 16 has a rear mudguard mounting hole 17 and a bolt upper hole. The positioning lug 7 has a bolt lower hole. The two ends of the axle of the second transition fixed pulley 15 are respectively connected to the bolt upper hole and the bolt lower hole.

[0029] The right rear fork tube 10 and the left rear fork tube 12 are respectively equipped with first transition fixed pulleys 14 in the grooves at the front end. The first transition fixed pulleys 14 are connected to the connecting sleeve 8 by fixing screws.

[0030] In this embodiment, steel wire rope through holes 18 are opened on both sides of the crossbeam 3 near both ends, and single stop bolts 19 are welded on both sides of the crossbeam 3 near the front end.

[0031] In this embodiment, double stop bolts 20 are welded to both sides of the crossbeam 3 near the rear end. The single stop bolt 19 and the double stop bolts 20 respectively serve to position the wire rope sleeve.

[0032] In this embodiment, a rivet nut 21 is riveted to the front side of the middle part of the diagonal brace tube 6, and the rivet nut 21 can serve to fix the water cup bracket.

[0033] See Figure 3 As shown, this utility model also provides a bicycle, including: the bicycle frame described above.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bicycle frame, characterized in that, include: Front frame (1) and rear frame (2); The front frame (1) includes a crossbeam (3), a head tube (4), a center tube (5), a diagonal brace tube (6), a positioning lug (7), and a foot arm mounting bracket (9); The head tube (4) is welded and fixed to the front end of the crossbeam (3). Connecting sleeves (8) are welded to both sides of the crossbeam (3) near the rear end. The rear end of the crossbeam (3) is welded to the upper part of the middle tube (5). The upper end of the diagonal brace tube (6) is welded to the part of the crossbeam (3) near the rear end, and the lower end is welded to the lower part of the middle tube (5). The positioning lug (7) is welded to the middle tube (5), and the lower end of the middle tube is welded to the foot arm mounting seat (9). The rear frame (2) includes a right rear fork tube (10), a right rear fork tailplate (11), a left rear fork tube (12), a left rear fork tailplate (13), and a second transition fixed pulley (15). The right rear fork tube (10) and the left rear fork tube (12) are connected to the crossbeam (3) through the connecting sleeve (8). The right rear fork tail plate (11) and the left rear fork tail plate (13) are welded to the outer rear end of the right rear fork tube (10) and the left rear fork tube (12) respectively. A rear fork tube connecting positioning component (16) is welded between the right rear fork tube (10) and the left rear fork tube (12). The rear fork tube connecting positioning component (16) has a rear mudguard mounting hole (17) and a bolt upper hole. The positioning lug (7) has a bolt lower hole. The two ends of the axle of the second transition fixed pulley (15) are connected to the bolt upper hole and the bolt lower hole respectively. The right rear fork tube (10) and the left rear fork tube (12) are respectively equipped with a first transition fixed pulley (14) in the groove at the front end. The first transition fixed pulley (14) is connected to the connecting sleeve (8) by a fixing screw.

2. The bicycle frame according to claim 1, characterized in that, The crossbeam (3) has wire rope through holes (18) on both sides near the two ends, and single stop bolts (19) are welded on both sides near the front end of the crossbeam (3).

3. The bicycle frame according to claim 1, characterized in that, Double stop bolts (20) are welded to both sides of the crossbeam (3) near the rear end.

4. The bicycle frame according to claim 1, characterized in that, The front side of the middle part of the diagonal brace tube (6) is riveted with a rivet nut (21).

5. A bicycle, characterized in that, include: The bicycle frame as described in any one of claims 1-4.

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