Height-adjustable frame

Abstract

The utility model relates to the technical field of frames, in particular to a height-adjustable frame, an adjusting part is arranged between the rear end of an upper frame part and the rear end of a lower frame part, the adjusting part comprises a rotating part, a limiting part and a guiding part, the guiding part is arranged at the top of the rear end of the upper frame part, the limiting part is arranged in the guiding part in a sliding mode, the rotating part is located in the middle of the limiting part, and the limiting part is located in the middle of the rotating part. The rotating part is rotationally connected with the upper frame part and is in threaded connection with the lower frame part, the limiting part is pressed downwards along the guide part, so that the limiting part loses limitation on the rotating part, the rotating part is rotated, when the rotating part is far away from the lower frame part, the distance between the upper frame part and the lower frame part is increased, and the height of the frame is increased, and when the rotating part is close to the lower frame part, the distance between the upper frame part and the lower frame part is increased. The distance between the upper frame part and the lower frame part is reduced, the height of the bicycle frame is reduced, the limiting part is loosened, the limiting part pops up from the guide part, the rotating part is locked, the bicycle frame is fixed to the specific height, and the situation that the rotating part rotates in the running process of the electric bicycle, the height of the bicycle frame is changed, and the riding experience is affected is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle frames, in particular to a height-adjustable vehicle frame. Background Art

[0002] An adjustable height e-bike frame is a design that allows the user to adjust the height of the entire frame according to their height and riding preferences. The purpose of this design is to improve riding comfort and adaptability, allowing riders of different heights to find the riding position that best suits them.

[0003] Most height-adjustable electric bicycle frames use telescopic tube assemblies or sliding connectors to change the length of key parts of the frame, thereby affecting the distance between the seat and the pedals and the rider's overall sitting posture. However, most telescopic tube assemblies for adjusting the height of the electric bicycle frame lack fixings. As the electric bicycle moves, the telescopic tube assembly may retract, reducing the height of the electric bicycle frame and reducing the riding experience. Utility Model Content

[0004] The main purpose of the utility model is to provide a height-adjustable bicycle frame to solve the problem that most telescopic tube assemblies proposed in the related art lack fixing parts.

[0005] To achieve the above-mentioned object, according to one aspect of the present invention, a height-adjustable bicycle frame is provided, comprising: a connecting tube, the connecting tube being provided at the front of the bicycle frame and being used to connect the handlebars and the front wheel;

[0006] An upper frame portion, the upper frame portion is located above the vehicle frame, and the front end of the upper frame portion is rotatably connected to the connecting tube;

[0007] A lower frame portion, the lower frame portion is located above the vehicle frame and below the upper frame portion, and the lower frame portion is fixedly connected to the connecting tube;

[0008] A tail rack portion, the tail rack portion is fixedly arranged behind the upper rack portion and is used to install a passenger seat;

[0009] The adjusting part is arranged between the upper frame and the rear end of the lower frame, and the adjusting part includes a rotating part, a limiting part and a guide part, the guide part is arranged at the top of the rear end of the upper frame, the limiting part is slidably arranged in the guide part, and the rotating part is located in the middle of the limiting part, the rotating part is rotatably connected to the upper frame and threadedly connected to the lower frame, and the limiting part is pressed downward along the guide part to make it lose the restriction on the rotating part, and the rotating part is rotated. When the rotating part moves away from the lower frame, the distance between the upper frame and the lower frame increases, and the height of the frame becomes larger. When the rotating part approaches the lower frame, the distance between the upper frame and the lower frame decreases, and the height of the frame becomes smaller. The limiting part is released, and the limiting part pops out from the guide part, is located on the outer ring of the rotating part, and locks the rotating part to fix the frame at a specific height.

[0010] Furthermore, the upper shelf part includes two upper shelf main rods, a connecting plate and an upper support plate. The two upper shelf main rods are distributed in a triangular shape, and the front ends are rotatably connected to the connecting tube. The connecting plate is fixed between the middle parts of the front ends of the two upper shelf main rods, and the rear ends of the upper shelf main rods are hinged to the upper support plate.

[0011] Furthermore, the lower frame portion includes a lower frame rod group and a column slot group, the lower frame rod group includes two lower frame main rods, a plurality of connecting rods and a lower support plate, and the column slot group includes a right telescopic rod, a left telescopic rod and a threaded groove column.

[0012] Furthermore, the two lower frame main rods are distributed in a triangular shape, and the front ends are fixedly connected to the connecting tubes, the connecting rods are fixedly arranged between the two lower frame main rods, and the lower support plate is fixedly arranged above the rear ends of the two lower frame main rods.

[0013] Furthermore, the threaded groove column is fixedly arranged on the middle part of the upper surface of the lower support plate, the threaded groove column is provided with a threaded groove, the threaded groove opens upward, the right telescopic rod is located on the right side of the threaded groove column, the upper end of the right telescopic rod is fixedly connected to the upper support plate, and the lower end is fixedly connected to the lower support plate, the left telescopic rod is located on the left side of the threaded groove column, the upper end of the left telescopic rod is fixedly connected to the upper support plate, and the lower end is fixedly connected to the lower support plate.

[0014] Furthermore, the tail frame portion includes a tail frame rod and a connecting strip, the tail frame rod is U-shaped, the U-shaped open end of the tail frame rod is fixedly connected to the upper support plate, and the connecting strip is fixedly arranged between the U-shaped rods of the tail frame rod.

[0015] Furthermore, the guide portion includes a through hole, an annular groove and several limit grooves. The through hole is arranged through the middle of the upper support plate, the annular groove is arranged in the middle of the upper support plate and is located on the outer circle of the through hole, and the limit grooves are all arranged on the upper support plate. The limit grooves are all located on the outer circle of the annular groove and are connected to the annular groove.

[0016] Furthermore, the limiting part includes a limiting ring, a plurality of limiting strips, a plurality of anti-rotation grooves and a plurality of springs. The limiting ring is slidably arranged in the annular groove. The limiting strips are fixedly arranged on the outer ring of the limiting ring and are slidably connected to the limiting grooves.

[0017] Furthermore, the anti-rotation grooves are all arranged above the inner ring of the limiting ring, and the anti-rotation grooves are inclined wedge-shaped. The upper ends of the springs are fixedly connected to the bottom of the limiting ring, and the bottom ends are fixedly connected to the upper support plate.

[0018] Furthermore, the rotating part includes a knob, a plurality of protrusions, a plurality of anti-rotation blocks and a threaded rod, the protrusions are fixed on the outer ring of the knob, the anti-rotation blocks are fixed on the bottom of the outer ring of the knob, the threaded rod is fixed in the middle of the bottom of the knob, and the threaded rod is rotatably connected to the upper support plate and is threadedly connected to the threaded groove column.

[0019] Compared with the prior art, the present invention has the following beneficial effects: pressing the limiting part downward along the guide part causes it to lose its restriction on the rotating part, and rotating the rotating part. When the rotating part moves away from the lower frame part, the distance between the upper frame part and the lower frame part increases, and the frame height becomes larger. When the rotating part approaches the lower frame part, the distance between the upper frame part and the lower frame part decreases, and the frame height becomes smaller. Loosening the limiting part, the limiting part pops out from the guide part, is located on the outer ring of the rotating part, and locks the rotating part, fixing the frame at a specific height, preventing the rotating part from rotating during the driving of the electric bicycle, changing the frame height, and affecting the riding experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall schematic diagram of the utility model;

[0021] Figure 2 This is a structural diagram of the adjustment part of the utility model;

[0022] Figure 3 This is a schematic diagram of the guide structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the limiting part of the utility model;

[0024] Figure 5 This is a schematic structural diagram of the rotating part of the utility model.

[0025] Illustration:

[0026] 1. Upper rack; 11. Upper rack main pole; 12. Connecting plate; 13. Upper support plate;

[0027] 2. Lower shelf; 21. Lower shelf main rod; 22. Connecting rod; 23. Lower support plate; 24. Right telescopic rod; 25. Left telescopic rod; 26. Threaded groove column;

[0028] 3. Connecting tube;

[0029] 4. Tailstock; 41. Tailstock rod; 42. Connecting bar;

[0030] 5. Adjustment part; 51. Rotation part; 52. Limiting part; 53. Guide part; 511. Knob; 512. Raised strip; 513. Anti-rotation block; 514. Threaded rod; 521. Limiting ring; 522. Limiting strip; 523. Anti-rotation groove; 524. Spring; 531. Through hole; 532. Annular groove; 533. Limiting groove. DETAILED DESCRIPTION

[0031] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the following is a detailed description of the specific implementation method, structure, characteristics and effects of the present invention in combination with the accompanying drawings and preferred embodiments.

[0032] See also Figures 1 to 5 , this embodiment provides a height-adjustable frame, comprising: a connecting tube 3, the connecting tube 3 being provided at the front of the frame and being used to connect the handlebars and the front wheel;

[0033] The upper frame 1 is located above the vehicle frame, and the front end of the upper frame 1 is rotatably connected to the connecting tube 3;

[0034] The lower frame 2 is located above the vehicle frame and below the upper frame 1. The lower frame 2 is fixedly connected to the connecting tube 3.

[0035] The tail frame part 4 is fixedly arranged at the rear of the upper frame part 1 and is used to install the passenger seat;

[0036] The adjusting part 5 is arranged between the rear ends of the upper frame 1 and the lower frame 2. The adjusting part 5 includes a rotating part 51, a limiting part 52 and a guiding part 53. The guiding part 53 is arranged at the top of the rear end of the upper frame 1, and the limiting part 52 is slidably arranged in the guiding part 53. The rotating part 51 is located in the middle of the limiting part 52. The rotating part 51 is rotatably connected to the upper frame 1 and is threadedly connected to the lower frame 2. The limiting part 52 is pressed downward along the guiding part 53 to make it lose the restriction on the rotating part 51. The rotating part 51 is rotated. When the rotating part 51 moves away from the lower frame 2, the distance between the upper frame 1 and the lower frame 2 increases, and the height of the frame becomes larger. When the rotating part 51 approaches the lower frame 2, the distance between the upper frame 1 and the lower frame 2 decreases, and the height of the frame becomes smaller. The limiting part 52 is released, and the limiting part 52 pops out from the guiding part 53, is located on the outer ring of the rotating part 51, and locks the rotating part 51 to fix the frame at a specific height.

[0037] The upper frame part 1 includes two upper frame main rods 11, a connecting plate 12 and an upper support plate 13. The two upper frame main rods 11 are distributed in a triangular shape, and the front ends are rotatably connected to the connecting tube 3. The connecting plate 12 is fixed between the middle parts of the front ends of the two upper frame main rods 11, and the rear ends of the upper frame main rods 11 are hinged to the upper support plate 13.

[0038] The lower frame part 2 includes a lower frame rod group and a column slot group. The lower frame rod group includes two lower frame main rods 21, several connecting rods 22 and a lower support plate 23, and the column slot group includes a right telescopic rod 24, a left telescopic rod 25 and a threaded groove column 26.

[0039] The two lower frame main rods 21 are distributed in a triangular shape, and the front ends are fixedly connected to the connecting tube 3. The connecting rods 22 are fixedly arranged between the two lower frame main rods 21, and the lower support plate 23 is fixedly arranged above the rear ends of the two lower frame main rods 21.

[0040] The threaded groove column 26 is fixedly arranged in the middle of the upper surface of the lower support plate 23. The threaded groove column 26 is provided with a threaded groove, and the threaded groove opens upward to accommodate the threaded rod 514. The right telescopic rod 24 is located on the right side of the threaded groove column 26. The upper end of the right telescopic rod 24 is fixedly connected to the upper support plate 13, and the lower end is fixedly connected to the lower support plate 23. The left telescopic rod 25 is located on the left side of the threaded groove column 26. The upper end of the left telescopic rod 25 is fixedly connected to the upper support plate 13, and the lower end is fixedly connected to the lower support plate 23. The right telescopic rod 24 and the left telescopic rod 25 limit the upper shelf 1 to prevent the upper shelf 1 from rotating with the knob 511.

[0041] The tail frame portion 4 includes a tail frame rod 41 and a connecting strip 42. The tail frame rod 41 is U-shaped. The U-shaped open end of the tail frame rod 41 is fixedly connected to the upper support plate 13. The connecting strip 42 is fixedly arranged between the U-shaped rods of the tail frame rod 41 to enhance the integrity of the tail frame rod 41.

[0042] The guide portion 53 includes a through hole 531, an annular groove 532 and a plurality of limiting grooves 533. The through hole 531 is arranged through the middle of the upper support plate 13. The annular groove 532 is arranged in the middle of the upper support plate 13 and is located on the outer circle of the through hole 531. The limiting grooves 533 are all arranged on the upper support plate 13. The limiting grooves 533 are all located on the outer circle of the annular groove 532 and are connected to the annular groove 532.

[0043] The limiting portion 52 includes a limiting ring 521, a plurality of limiting strips 522, a plurality of anti-rotation grooves 523 and a plurality of springs 524. The limiting ring 521 is slidably arranged in the annular groove 532. The limiting strips 522 are fixedly arranged on the outer ring of the limiting ring 521 and are slidably connected to the limiting grooves 533.

[0044] The anti-rotation grooves 523 are all arranged above the inner ring of the limiting ring 521. The anti-rotation grooves 523 are inclined wedge-shaped. The upper ends of the springs 524 are fixedly connected to the bottom of the limiting ring 521, and the bottom ends are fixedly connected to the upper support plate 13.

[0045] The rotating part 51 includes a knob 511, a plurality of protrusions 512, a plurality of stop blocks 513 and a threaded rod 514. The protrusions 512 are all fixed on the outer ring of the knob 511, the stop blocks 513 are all fixed on the bottom of the outer ring of the knob 511, and the threaded rod 514 is fixed in the middle of the bottom of the knob 511. The threaded rod 514 is rotatably connected to the upper support plate 13 and is threadedly connected to the threaded groove column 26. The stop blocks 513 are inclined wedge-shaped, and the number is the same as the stop groove 523. They are located opposite to the stop groove 523. When the stop blocks 513 are located in the stop groove 523, the knob 511 cannot be rotated. When the stop blocks 513 are out of the stop groove 523, the knob 511 can be rotated.

[0046] The stop ring 521 is pressed downward, and the extrusion spring 524 contracts, causing the anti-rotation groove 523 to slide out of the anti-rotation block 513, and the knob 511 is turned clockwise. The knob 511 drives the threaded rod 514 to rotate downward in the threaded groove column 26, pulling the upper support plate 13 to the lower support plate 23, and the upper frame main rod 11 rotates downward around the connecting tube 3, shortening the distance between the upper frame part 1 and the lower frame part 2, and reducing the frame height; turn the knob 511 counterclockwise, and the knob 511 drives the threaded rod 514 to rotate upward in the threaded groove column 26, pulling the upper support plate 13 away from the lower support plate Plate 23, the upper frame main rod 11 rotates upward around the connecting tube 3, increasing the distance between the upper frame part 1 and the lower frame part 2, and the frame height becomes larger; after adjusting the frame to a suitable height, stop turning the knob 511, loosen the limit ring 521, the spring 524 rebounds, and pushes the limit ring 521 to move upward, and the anti-rotation groove 523 wraps the corresponding anti-rotation block 513 therein, so that the wedge-shaped tip of the anti-rotation block 513 is inserted into the wedge-shaped tip of the anti-rotation groove 523, avoiding relative rotation between the anti-rotation block 513 and the anti-rotation groove 523, thereby preventing the threaded rod 514 from rotating, and fixing the frame at a specific height.

[0047] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Height adjustable frame, characterized by: include: A connecting tube (3), the connecting tube (3) being arranged in front of the frame and used for connecting the handlebars and the front wheel; An upper frame portion (1), the upper frame portion (1) is located above the vehicle frame, and a front end of the upper frame portion (1) is rotatably connected to the connecting tube (3); A lower frame portion (2), the lower frame portion (2) is located above the vehicle frame and below the upper frame portion (1), and the lower frame portion (2) is fixedly connected to the connecting tube (3); A tail frame portion (4), the tail frame portion (4) is fixedly arranged behind the upper frame portion (1), and the tail frame portion (4) is used to install a passenger seat; An adjusting portion (5), the adjusting portion (5) is arranged between the rear ends of the upper frame portion (1) and the lower frame portion (2), the adjusting portion (5) comprises a rotating portion (51), a limiting portion (52) and a guiding portion (53), the guiding portion (53) being arranged at the top of the rear end of the upper frame portion (1), the limiting portion (52) being slidably arranged in the guiding portion (53), the rotating portion (51) being located in the middle of the limiting portion (52), the rotating portion (51) being rotatably connected to the upper frame portion (1) and being threadedly connected to the lower frame portion (2), and the limiting portion being pressed downward along the guiding portion (53). (52) makes it lose the restriction on the rotating part (51), and rotates the rotating part (51). When the rotating part (51) moves away from the lower frame part (2), the distance between the upper frame part (1) and the lower frame part (2) increases, and the frame height increases. When the rotating part (51) approaches the lower frame part (2), the distance between the upper frame part (1) and the lower frame part (2) decreases, and the frame height decreases. The limiting part (52) is released, and the limiting part (52) pops out from the guide part (53), is located on the outer ring of the rotating part (51), and locks the rotating part (51), fixing the frame at a specific height.

2. The height-adjustable frame according to claim 1, wherein: The upper frame portion (1) comprises two upper frame main rods (11), a connecting plate (12) and an upper support plate (13). The two upper frame main rods (11) are distributed in a triangular shape, and the front ends of the two upper frame main rods (11) are rotatably connected to the connecting tube (3). The connecting plate (12) is fixedly arranged between the middle parts of the front ends of the two upper frame main rods (11), and the rear ends of the upper frame main rods (11) are hinged to the upper support plate (13).

3. The height-adjustable frame according to claim 2, wherein: The lower frame portion (2) comprises a lower frame rod group and a column slot group, wherein the lower frame rod group comprises two lower frame main rods (21), a plurality of connecting rods (22) and a lower support plate (23), and the column slot group comprises a right telescopic rod (24), a left telescopic rod (25) and a threaded groove column (26).

4. The height-adjustable frame according to claim 3, wherein: The two lower frame main rods (21) are distributed in a triangular shape, and the front ends are fixedly connected to the connecting tube (3); the connecting rods (22) are fixedly arranged between the two lower frame main rods (21); and the lower support plate (23) is fixedly arranged above the rear ends of the two lower frame main rods (21).

5. The height-adjustable frame according to claim 3, wherein: The thread groove column (26) is fixedly arranged at the middle part of the upper surface of the lower support plate (23), and the thread groove column (26) is provided with a thread groove, and the thread groove opens upward. The right telescopic rod (24) is located on the right side of the thread groove column (26), and the upper end of the right telescopic rod (24) is fixedly connected to the upper support plate (13), and the lower end is fixedly connected to the lower support plate (23). The left telescopic rod (25) is located on the left side of the thread groove column (26), and the upper end of the left telescopic rod (25) is fixedly connected to the upper support plate (13), and the lower end is fixedly connected to the lower support plate (23).

6. The height-adjustable frame according to claim 2, wherein: The tail frame portion (4) comprises a tail frame rod (41) and a connecting strip (42); the tail frame rod (41) is U-shaped; the U-shaped open end of the tail frame rod (41) is fixedly connected to the upper support plate (13); and the connecting strip (42) is fixedly arranged between the U-shaped rods of the tail frame rod (41).

7. The height-adjustable frame according to claim 2, wherein: The guide portion (53) includes a through hole (531), an annular groove (532) and a plurality of limiting grooves (533), wherein the through hole (531) is provided through the middle of the upper support plate (13), the annular groove (532) is provided in the middle of the upper support plate (13) and is located on the outer ring of the through hole (531), and the limiting grooves (533) are all provided on the upper support plate (13), and the limiting grooves (533) are all located on the outer ring of the annular groove (532) and are communicated with the annular groove (532).

8. The height-adjustable frame according to claim 2, wherein: The limiting portion (52) includes a limiting ring (521), a plurality of limiting strips (522), a plurality of anti-rotation grooves (523) and a plurality of springs (524). The limiting ring (521) is slidably arranged in the annular groove (532). The limiting strips (522) are fixedly arranged on the outer ring of the limiting ring (521) and are slidably connected to the limiting grooves (533).

9. The height-adjustable frame according to claim 8, wherein: The anti-rotation grooves (523) are all provided above the inner ring of the limiting ring (521), and the anti-rotation grooves (523) are in an inclined wedge shape. The upper ends of the springs (524) are all fixedly connected to the bottom of the limiting ring (521), and the lower ends are all fixedly connected to the upper support plate (13).

10. The height-adjustable frame according to claim 7, wherein: The rotating portion (51) includes a knob (511), a plurality of convex strips (512), a plurality of anti-rotation blocks (513) and a threaded rod (514), wherein the convex strips (512) are fixedly arranged on the outer ring of the knob (511), the anti-rotation blocks (513) are fixedly arranged on the bottom of the outer ring of the knob (511), and the threaded rod (514) is fixedly arranged in the middle of the bottom of the knob (511). The threaded rod (514) is rotatably connected to the upper support plate (13) and is threadedly connected to the threaded groove column (26).

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