Electric folding mountain bike frame

Abstract

This utility model discloses an electric folding mountain bike frame, including a center tube, a shock-absorbing connection part, a rear fork, and a shock absorber. The rear fork includes a rear upper fork and a rear lower fork located at the bottom of the rear upper fork. The rear upper fork and the rear lower fork are integral parts. One end of the shock absorber is connected to the shock-absorbing connection part, and the other end is connected to the rear upper fork. The shock-absorbing connection part is located on the side wall of the center tube and includes an annular outer wall and a reinforcing plate. One side of the annular outer wall is connected to the side wall of the center tube, and the other side extends obliquely. Two arc-shaped notches are formed on the annular outer wall, and the two arc-shaped notches are arranged opposite each other. There are two reinforcing plates arranged side by side inside the annular outer wall. The reinforcing plates are integral parts with the annular outer wall. The reinforcing plates have through holes, and the two through holes are arranged opposite each other. A groove is provided between the two reinforcing plates. This utility model has good shock absorption performance and strong structural stability.

Description

Technical Field

[0001] This utility model relates to an electric folding mountain bike frame, belonging to the field of electric bicycles. Background Technology

[0002] Cycling is a popular sport in daily life, and it is inseparable from bicycles. Traditional bicycles are usually large in size due to the limitations of their frames, which makes them inconvenient to carry. Therefore, bicycles that are easy to carry have emerged.

[0003] Electric bicycles are mechatronic personal transportation vehicles that use batteries as auxiliary power and are based on ordinary bicycles, equipped with motors, controllers, batteries, throttles, brakes, and display systems. Ordinary bicycles, once the primary mode of transportation due to their small size, light weight, low price, and convenience, are increasingly favored as pollution-free, noise-free, lightweight, and energy-efficient vehicles. With the development of urban roads, the faster pace of life, and the improvement of living standards, electric bicycles, with their labor-saving, safe, fast, and economical features, are popular among women and the elderly, becoming a new consumer trend. Compared to cars, electric bicycles have advantages such as lower energy consumption, no pollution, and convenient operation. Currently, most existing bicycles have solid front support frames, with cables running outside the frame. This design makes the wires prone to damage and the circuit connection unstable.

[0004] Chinese patent CN118358683A discloses a fast electric-assisted bicycle, including a front wheel, a rear wheel, and a frame, wherein the front wheel and rear wheel are rotatably mounted at both ends of the frame; the frame includes a front frame, a middle frame, and a rear frame; one end of the front frame is hinged to the middle frame, and the hinge rotation direction between the front frame and the middle frame is horizontal; the front frame is also rotatably connected to the front wheel; handlebars are mounted on the front frame; a seat and pedals are mounted on the middle frame; an electric component is also mounted on the middle frame, located below the seat on the middle frame; the seat post of the seat passes through the electric component; the electric component is connected to the pedals for transmission; the electric component is also connected to a controller mounted on the handlebars. This patent has poor shock absorption performance and unstable structural performance. Utility Model Content

[0005] The technical problem to be solved by this utility model is to propose a bicycle frame with good shock absorption performance and strong structural stability.

[0006] The technical solution provided by this utility model to solve the above-mentioned technical problems is as follows: an electric folding mountain bike frame, including a center tube, a shock-absorbing connection part, a rear fork, and a shock absorber. The rear fork includes a rear upper fork and a rear lower fork located at the bottom of the rear upper fork. The rear upper fork and the rear lower fork are integral parts. One end of the shock absorber is connected to the shock-absorbing connection part, and the other end is connected to the rear upper fork. The shock-absorbing connection part is located on the side wall of the center tube. The shock-absorbing connection part includes an annular outer wall and a reinforcing plate. One side of the annular outer wall is connected to the side wall of the center tube, and the other side extends obliquely. Two arc-shaped notches are opened on the annular outer wall. The two arc-shaped notches are arranged opposite each other. There are two reinforcing plates arranged side by side inside the annular outer wall. The reinforcing plates are integral parts with the annular outer wall. The reinforcing plates have reinforcing plate through holes. The two reinforcing plate through holes are arranged opposite each other. A groove is provided between the two reinforcing plates.

[0007] Preferably, a rear fork connection is provided on the side wall of the middle tube directly below the shock absorber connection. The rear fork connection is provided with a rear fork connection hole arranged along the width direction of the rear fork connection. The rear fork connection is hinged to one end of the rear lower fork. The rear lower fork is provided with a lower fork fixing hole at one end that is fixed to the rear fork connection. The lower fork fixing hole and the rear fork connection hole are concentrically arranged. Set bolts are provided in the lower fork fixing hole and the rear fork connection hole.

[0008] Preferably, the rear upper fork is provided with a shock-absorbing fixing part, and the middle part of the shock-absorbing fixing part is provided with two connecting plates arranged side by side. The connecting plates and the shock-absorbing fixing part are integral parts. The connecting plates are provided with shock-absorbing fixing holes arranged along the width direction of the rear upper fork. The two shock-absorbing fixing holes are arranged opposite to each other, and a storage groove is provided between the two connecting plates.

[0009] Preferably, the shock absorber is cylindrical in shape, and one end of the shock absorber is provided with a first connector. The first connector is matched with the shape and size of the groove and is locked in the groove. The first connector is provided with an installation through hole along the width direction of the shock absorber. The installation through hole is concentric with the through holes of the reinforcing plates on both sides. Fixing bolts are provided in the installation through hole and the through holes of the reinforcing plates.

[0010] Preferably, the shock absorber is cylindrical in shape, and one end of the shock absorber is provided with a second connector. The second connector matches the shape and size of the storage groove and is locked in the storage groove. The second connector is provided with a fixing through hole along the width direction of the shock absorber. The fixing through hole is concentric with the shock absorber fixing holes on both sides. Fixing bolts are provided in the fixing through hole and the shock absorber fixing holes.

[0011] Preferably, upper fork fixing holes are provided on both sides of the rear upper fork, the upper fork fixing holes are concentrically arranged with the shock absorption fixing holes on the connecting plate, and the diameter of the upper fork fixing holes is larger than the diameter of the shock absorption fixing holes.

[0012] Preferably, a crank connecting part is provided on the side wall of the center tube, the side of the crank connecting part is fixedly connected to the side wall of the center tube, the top surface of the crank connecting part is fixedly connected to the bottom of the frame body, a gear and a crank are rotatably connected to one end of the crank connecting part near the bottom of the center tube, and the bottom of the crank connecting part is flush with the bottom of the center tube.

[0013] Preferably, the middle tube is hollow inside and has a cavity, in which a motor of a matching shape and size is installed, and the bottom of the middle tube is provided with a cover plate that can be detachably connected to it.

[0014] This utility model has positive effects: The bicycle frame of this utility model has a shock-absorbing connection part fixed on the outer wall of the center tube, and a rear fork connection part located directly below the shock-absorbing connection part on the side wall of the center tube. A shock-absorbing fixing part is provided on one end of the rear fork near the shock-absorbing connection part. A shock absorber is provided between the shock-absorbing fixing part and the shock-absorbing connection part. The shock absorber has connectors at both ends, which are fixedly connected to the shock-absorbing connection part and the shock-absorbing fixing part, respectively. Its structure has stable connection, good firmness, and strong shock absorption performance. Attached Figure Description

[0015] The following description, in conjunction with the accompanying drawings, further illustrates an electric folding mountain bike frame according to this utility model.

[0016] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 for Figure 1 A schematic diagram of the central tube structure; Figure 3 for Figure 1 A schematic diagram of the shock absorber structure; Figure 4 for Figure 1 A schematic diagram of the rear fork structure; Figure 5 for Figure 1 A partial structural diagram.

[0017] The above figures are labeled as follows: Center tube 6, crank connection 61, shock absorber connection 62, annular outer wall 621, reinforcing plate 622, arc-shaped notch 623, reinforcing plate through hole 624, groove 625, rear fork connection 63, rear fork connection hole 631, cover plate 64, rear fork 7, rear upper fork 71, rear lower fork 72, lower fork fixing hole 73, shock absorber fixing part 74, connecting plate 75, shock absorber fixing hole 76, through groove 77, upper fork fixing hole 78, shock absorber 8, first connector 81, mounting through hole 82, second connector 83, fixing through hole 84. Detailed Implementation

[0018] Example 1 See Figures 1 to 5 The electric folding mountain bike frame of this embodiment includes a center tube 6, a shock-absorbing connection 62, a rear fork 7, and a shock absorber 8. The rear fork 7 includes a rear upper fork 71 and a rear lower fork 72 located at the bottom of the rear upper fork 71. The rear upper fork 71 and the rear lower fork 72 are integral. One end of the shock absorber 8 is connected to the shock-absorbing connection 62, and the other end is connected to the rear upper fork 71. The shock-absorbing connection 62 is located on the side wall of the center tube 6 and includes an annular outer wall 621 and a reinforcing plate 622. One side of the outer wall 621 is connected to the side wall of the middle tube 6, and the other side extends obliquely. Two arc-shaped notches 623 are opened on the annular outer wall 621. The two arc-shaped notches 623 are arranged opposite each other. There are two reinforcing plates 622 arranged side by side in the annular outer wall 621. The reinforcing plates 622 and the annular outer wall 621 are integral parts. The reinforcing plates 622 are provided with reinforcing plate through holes 624. The two reinforcing plate through holes 624 are arranged opposite each other. A groove 625 is provided between the two reinforcing plates 622.

[0019] A rear fork connection 63 is provided on the side wall of the middle tube 6 directly below the shock absorber connection 62. The rear fork connection 63 is provided with a rear fork connection hole 631 arranged along the width direction of the rear fork connection 63. The rear fork connection 63 is hinged to one end of the rear lower fork 72. The rear lower fork 72 is provided with a lower fork fixing hole 73 at the end that is fixed to the rear fork connection 63. The lower fork fixing hole 73 and the rear fork connection hole 631 are concentrically arranged. Set bolts are provided in the lower fork fixing hole 73 and the rear fork connection hole 631.

[0020] The rear upper fork 71 is provided with a shock-absorbing fixing part 74. The middle part of the shock-absorbing fixing part 74 is provided with two connecting plates 75 arranged side by side. The connecting plates 75 and the shock-absorbing fixing part 74 are integral parts. The connecting plates 75 are provided with shock-absorbing fixing holes 76 arranged along the width direction of the rear upper fork 71. The two shock-absorbing fixing holes 76 are arranged opposite to each other. A storage groove 77 is provided between the two connecting plates 75.

[0021] The shock absorber 8 is cylindrical in shape. One end of the shock absorber 8 is provided with a first connector 81. The shape and size of the first connector 81 match the groove 625. The first connector 81 is locked in the groove 625. The first connector 81 is provided with a mounting through hole 82 along the width direction of the shock absorber 8. The mounting through hole 82 is concentric with the reinforcing plate through holes 624 on both sides. Fixing bolts are provided in the mounting through hole 82 and the reinforcing plate through holes 624.

[0022] The other end of the shock absorber 8 is provided with a second connector 83. The shape and size of the second connector 83 match the storage groove 77. The second connector 83 is locked in the storage groove 77. A fixing through hole 84 is provided on the second connector 83 along the width direction of the shock absorber 8. The fixing through hole 84 is concentrically arranged with the shock absorber fixing holes 76 on both sides. Fixing bolts are provided in the fixing through hole 84 and the shock absorber fixing holes 76.

[0023] The upper fork 71 has upper fork fixing holes 78 on both sides. The upper fork fixing holes 78 are concentrically set with the shock absorption fixing holes 76 on the connecting plate 75. The diameter of the upper fork fixing holes 78 is larger than the diameter of the shock absorption fixing holes 76.

[0024] A crank connection part 61 is provided on the side wall of the bottom tube 6. The side of the crank connection part 61 is fixedly connected to the side wall of the bottom tube 6, and the top surface of the crank connection part 61 is fixedly connected to the bottom of the frame body. A gear and crank are rotatably connected to one end of the crank connection part 61 near the bottom of the bottom tube 6. The bottom of the crank connection part 61 is flush with the bottom of the bottom tube 6. The bottom of the bottom tube 6 is hollow and has a cavity. A motor of a matching shape and size is installed in the cavity. A cover plate 64 is provided at the bottom of the bottom tube 6 and can be detachably connected to it.

[0025] Example 2 The frame of the electric folding mountain bike in this embodiment is otherwise the same as in Embodiment 1, except that the shock absorber 8 is cylindrical in shape. One end of the shock absorber 8 is provided with a first connector 81, which matches the shape and size of the groove 625. The first connector 81 is engaged in the groove 625. The first connector 81 has a mounting through hole 82 arranged along the width direction of the shock absorber 8. The mounting through hole 82 is concentric with the through holes 624 of the reinforcing plates on both sides. Fixing bolts are provided in the mounting through hole 82 and the through holes 624 of the reinforcing plates. The other end of the shock absorber 8 is welded and fixed to the shock absorber fixing part 74.

[0026] Example 3 The frame of the electric folding mountain bike in this embodiment is otherwise the same as in Embodiment 1, except that the shock absorber 8 is cylindrical in shape. One end of the shock absorber 8 is provided with a second connector 83, which matches the shape and size of the storage slot 77. The second connector 83 is snapped into the storage slot 77. A fixing through hole 84 is provided on the second connector 83 along the width direction of the shock absorber 8. The fixing through hole 84 is concentric with the shock absorber fixing holes 76 on both sides. Fixing bolts are provided in the fixing through hole 84 and the shock absorber fixing holes 76. The other end of the shock absorber 8 is welded and fixed to the shock absorber connection part 62.

[0027] Obviously, the above embodiments are merely examples for clearly illustrating the embodiments of this utility model, and are not intended to limit the embodiments of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, these obvious variations or modifications derived from the spirit of this utility model are still within the protection scope of this utility model.

Claims

1. An electric folding mountain bike frame, comprising a center tube (6), a shock-absorbing connector (62), a rear fork (7), and a shock absorber (8), characterized in that, The rear fork (7) includes a rear upper fork (71) and a rear lower fork (72) located at the bottom of the rear upper fork (71). The rear upper fork (71) and the rear lower fork (72) are integral parts. One end of the shock absorber (8) is connected to the shock absorber connection part (62), and the other end is connected to the rear upper fork (71). The shock absorber connection part (62) is located on the side wall of the center tube (6). The shock absorber connection part (62) includes an annular outer wall (621) and a reinforcing plate (622). One side of the annular outer wall (621) is connected to the side wall of the center tube (6). Extending obliquely on the other side, the annular outer wall (621) has two arc-shaped notches (623) which are arranged opposite to each other. There are two reinforcing plates (622) arranged side by side inside the annular outer wall (621). The reinforcing plates (622) and the annular outer wall (621) are integral parts. The reinforcing plates (622) have reinforcing plate through holes (624) which are arranged opposite to each other. A groove (625) is provided between the two reinforcing plates (622).

2. The electric folding mountain bike frame according to claim 1, characterized in that, The side wall of the middle tube (6) is provided with a rear fork connection part (63) directly below the shock absorber connection part (62). The rear fork connection part (63) is provided with a rear fork connection hole (631) arranged along the width direction of the rear fork connection part (63). The rear fork connection part (63) is hinged to one end of the rear lower fork (72). The rear lower fork (72) is provided with a lower fork fixing hole (73) at one end that is fixed to the rear fork connection part (63). The lower fork fixing hole (73) and the rear fork connection hole (631) are concentrically arranged. The lower fork fixing hole (73) and the rear fork connection hole (631) are provided with set bolts.

3. The electric folding mountain bike frame according to claim 1, characterized in that, The rear upper fork (71) is provided with a shock-absorbing fixing part (74). The middle part of the shock-absorbing fixing part (74) is provided with two connecting plates (75) arranged side by side. The connecting plate (75) and the shock-absorbing fixing part (74) are integral parts. The connecting plate (75) is provided with shock-absorbing fixing holes (76) arranged along the width direction of the rear upper fork (71). The two shock-absorbing fixing holes (76) are arranged opposite to each other. A storage groove (77) is provided between the two connecting plates (75).

4. The electric folding mountain bike frame according to claim 1, characterized in that, The shock absorber (8) is cylindrical in shape. One end of the shock absorber (8) is provided with a first connector (81). The shape and size of the first connector (81) match the groove (625). The first connector (81) is fitted into the groove (625). The first connector (81) is provided with an installation through hole (82) along the width direction of the shock absorber (8). The installation through hole (82) is concentrically arranged with the through holes (624) of the reinforcing plate on both sides. Fixing bolts are provided in the installation through hole (82) and the through hole (624) of the reinforcing plate.

5. The electric folding mountain bike frame according to claim 3, characterized in that, The shock absorber (8) is cylindrical in shape. One end of the shock absorber (8) is provided with a second connector (83). The second connector (83) matches the shape and size of the storage groove (77). The second connector (83) is inserted into the storage groove (77). A fixing through hole (84) is provided on the second connector (83) along the width direction of the shock absorber (8). The fixing through hole (84) is concentrically arranged with the shock absorber fixing holes (76) on both sides. Fixing bolts are provided in the fixing through hole (84) and the shock absorber fixing holes (76).

6. The electric folding mountain bike frame according to claim 3, characterized in that, The upper fork (71) has upper fork fixing holes (78) on both sides. The upper fork fixing holes (78) and the shock-absorbing fixing holes (76) on the connecting plate (75) are concentrically arranged. The diameter of the upper fork fixing holes (78) is larger than the diameter of the shock-absorbing fixing holes (76).

7. The electric folding mountain bike frame according to claim 1, characterized in that, The side wall of the center tube (6) is provided with a crank connecting part (61). The side of the crank connecting part (61) is fixedly connected to the side wall of the center tube (6). The top surface of the crank connecting part (61) is fixedly connected to the bottom of the frame body. The end of the crank connecting part (61) near the bottom of the center tube (6) is rotatably connected to a gear and a crank. The bottom of the crank connecting part (61) is flush with the bottom of the center tube (6).

8. The electric folding mountain bike frame according to claim 1, characterized in that, The middle tube (6) is hollow inside and has a cavity. A motor with a matching shape and size is installed in the cavity. The bottom of the middle tube (6) is provided with a cover plate (64) that can be detachably connected to it.

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