A soft-tail frame and bicycle

Abstract

This utility model relates to a soft-suspension bicycle frame, which includes a front wheel mount, a rear wheel mount, a linkage assembly, and a shock absorber. The rear wheel mount includes an upper fork frame and a lower fork frame, with the first end of the lower fork frame hinged to the upper fork frame. The second ends of both the upper and lower fork frames are hinged to the front wheel mount via the linkage assembly. The first end of the shock absorber is hinged to the front wheel mount, and the second end is hinged to the linkage assembly. The front and rear wheel mounts are connected by the linkage assembly, and the shock absorber connects the linkage assembly and the front wheel mount. This allows the shock absorber to absorb vibrations transmitted from the rear wheel to the linkage assembly when the bicycle travels on complex road surfaces. The front and rear wheel mounts can generate relative displacement through the linkage assembly to adapt to road conditions, giving the shock absorber more time to compress, better absorb impacts, maintain vehicle speed, and make riding smoother and more comfortable.

Description

Technical Field

[0001] This utility model relates to the field of bicycles, and more particularly to a soft-tail bicycle frame and bicycle. Background Technology

[0002] To improve the comfort of bicycles, shock absorbers are typically added to absorb vibrations during riding. In existing bicycle frames, the seat is mounted on the stem, and the rear seat forks and chainstays, which are used to mount the rear wheel, are usually hinged to the stem. Shock absorbers are then connected to the stem to absorb vibrations. Because the existing rear seat forks and chainstays are both connected to the stem, vibrations are inevitably transmitted to the user when the rear wheel travels over rough terrain, thus reducing comfort. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] This invention provides a soft-tail frame and bicycle, aiming to solve the problem of unsatisfactory comfort when bicycles travel on complex road surfaces in the prior art.

[0005] (II) Technical Solution

[0006] To address the aforementioned issues, this utility model provides a softtail frame, which includes: a front wheel mounting bracket, a rear wheel mounting bracket, a linkage assembly, and shock absorbers.

[0007] The front wheel mounting bracket is used to connect to the front wheel of the bicycle;

[0008] The rear wheel mounting bracket includes an upper fork bracket and a lower fork bracket. The first end of the upper fork bracket is used to hinge with the rear wheel of the bicycle, and the first end of the lower fork bracket is hinged with the upper fork bracket.

[0009] The second end of the upper fork frame and the second end of the lower fork frame are both hinged to the front wheel mount via the linkage assembly. The first end of the shock absorber is hinged to the front wheel mount, and the second end of the shock absorber is hinged to the linkage assembly. The rear wheel mount can be displaced relative to the front wheel mount, thereby driving the shock absorber through the linkage assembly.

[0010] Preferably, the front wheel mounting bracket includes a front upper rod, a front lower rod, and a vertical rod; the first end of the front upper rod and the first end of the front lower rod are fixedly connected, and the vertical rod is used to connect the second end of the front upper rod and the second end of the front lower rod;

[0011] The upper front rod and the lower front rod are respectively connected to the upper fork rod and the lower fork rod via the connecting rod assembly, and the first end of the shock absorber is hinged to the lower front rod.

[0012] Preferably, the linkage assembly includes: an upper hinge rod, a connecting plate, and a lower hinge rod;

[0013] The first end of the upper hinge rod is hinged to the upright rod, and the second end of the upper hinge rod is hinged to the second end of the upper fork rod;

[0014] The first end of the connecting plate is hinged to the middle of the upper hinge rod, and the second end of the connecting plate and the second end of the shock absorber are both hinged to the first end of the lower hinge rod.

[0015] The second end of the lower hinge rod is hinged to the middle of the front lower rod, and the second end of the lower fork frame is hinged to the middle of the lower hinge rod.

[0016] Preferably, the hinge point between the upper hinge rod and the upright rod is located at the connection between the upright rod and the front upper rod.

[0017] Preferably, the upper fork and the lower fork are arranged in pairs, with the two upper forks connected by an upper fork link and the two lower forks connected by a lower fork link.

[0018] Preferably, an idler wheel is rotatably mounted on the front wheel mounting bracket. The idler wheel is located above the chainring and is used for chain engagement.

[0019] Preferably, the idler gear is a gear with 18 teeth.

[0020] Preferably, the present invention also provides a bicycle, the bicycle including the soft-tail frame as described above.

[0021] (III) Beneficial Effects

[0022] In the technical solution of this utility model, the front wheel mount and the rear wheel mount are connected by a linkage assembly, and the linkage assembly and the front wheel mount are connected by a shock absorber. This allows the shock absorber to absorb the vibration transmitted from the rear wheel to the linkage assembly when the bicycle travels on complex road surfaces. The front wheel mount and the rear wheel mount can generate relative displacement through the linkage assembly to adapt to road conditions, allowing the shock absorber more time to compress, better absorb impact, maintain vehicle speed, make riding more stable, and improve comfort. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the soft-tail frame of this utility model;

[0024] Figure 2 This is a structural schematic diagram of the soft-tail frame of this utility model from another perspective;

[0025] Figure 3 for Figure 2 Enlarged view at point A.

[0026] [Explanation of Labels in the Attached Image]

[0027] 1: Front wheel mounting bracket; 11: Upper front pole; 12: Lower front pole; 13: Vertical pole; 14: Idler wheel;

[0028] 2: Rear wheel mounting bracket; 21: Upper fork; 22: Lower fork;

[0029] 3: Linkage assembly; 31: Upper hinge rod; 32: Connecting plate; 33: Lower hinge rod;

[0030] 4: Shock absorption. Detailed Implementation

[0031] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0033] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0034] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] This utility model provides a soft-tail bicycle frame, comprising: a front wheel mount 1, a rear wheel mount 2, a linkage assembly 3, and a shock absorber 4. The front wheel mount 1 is used to connect to the front wheel of the bicycle; it should be noted that the front wheel mount 1 is connected to the front wheel via the handlebars and the fork, not directly to the front wheel. The rear wheel mount 2 includes an upper fork 21 and a lower fork 22. The first end of the upper fork 21 is hinged to the rear wheel of the bicycle, and the first end of the lower fork 22 is hinged to the upper fork 21. The second ends of both the upper fork 21 and the lower fork 22 are hinged to the front wheel mount 1 via the linkage assembly 3. The first end of the shock absorber 4 is hinged to the front wheel mount 1, and the second end of the shock absorber 4 is hinged to the linkage assembly 3. The rear wheel mount 2 can move relative to the front wheel mount 1, thereby driving the shock absorber 4 through the linkage assembly 3.

[0036] In the technical solution of this utility model, the front wheel mounting bracket 1 and the rear wheel mounting bracket 2 are connected by a linkage assembly 3, and the linkage assembly 3 and the front wheel mounting bracket 1 are connected by a shock absorber 4. This allows the shock absorber 4 to absorb the vibration transmitted from the rear wheel to the linkage assembly 3 when the bicycle travels on complex road surfaces. The front wheel mounting bracket 1 and the rear wheel mounting bracket 2 can generate relative displacement through the linkage assembly 3 to adapt to the road conditions, allowing the shock absorber 4 to have more time to compress, better absorb the impact, maintain the vehicle speed, make the ride more stable, and improve comfort.

[0037] Furthermore, the front wheel mounting bracket 1 includes a front upper rod 11, a front lower rod 12, and a vertical rod 13; the first end of the front upper rod 11 and the first end of the front lower rod 12 are fixedly connected, and the vertical rod 13 is used to connect the second end of the front upper rod 11 and the second end of the front lower rod 12. It should be noted that, for ease of description in this application, the first end and the second end correspond to opposite ends on the respective parts. The front upper rod 11 and the front lower rod 12 are both connected to the upper fork 21 and the lower fork 22 respectively via the connecting rod assembly 3, and the first end of the shock absorber 4 is hinged to the front lower rod 12. In this design, during bicycle use, the front upper rod 11 is positioned above the front lower rod 12.

[0038] Furthermore, the linkage assembly 3 includes: an upper hinge rod 31, a connecting plate 32, and a lower hinge rod 33. The first end of the upper hinge rod 31 is hinged to the upright 13, and the second end of the upper hinge rod 31 is hinged to the second end of the upper fork 21. The first end of the connecting plate 32 is hinged to the middle of the upper hinge rod 31 (the middle of the hinge rod refers to the area between the first and second ends of the hinge rod, not specifically the midpoint of the upper hinge rod 31; the same applies in subsequent descriptions). The second ends of the connecting plate 32 and the second ends of the shock absorber 4 are both hinged to the first end of the lower hinge rod 33. The second end of the lower hinge rod 33 is hinged to the middle of the front lower rod 12, and the second end of the lower fork 22 is hinged to the middle of the lower hinge rod 33.

[0039] In the above scheme, when the rear wheel of the frame encounters an obstacle and is subjected to an upward force, the lower fork 22 will drive the lower hinge 33 to rotate. The lower hinge 33 moves counterclockwise around its second end, and the first end of the lower hinge 33 will tend to stretch the shock absorber 4. At the same time, the upper fork 21 will drive the upper hinge 31 to rotate. At this time, the upper hinge 31 moves clockwise around its first end, and the connecting plate 32 swings downward, thus tending to stretch the shock absorber 4. At this time, the rear wheel will have a rearward displacement. The rear wheel can move along this path, in the same direction as the impact force, allowing the shock absorber 4 more time to compress, better absorb the impact, maintain vehicle speed, and make riding more stable, especially with significant advantages on rough terrain or right-angle obstacles.

[0040] In a preferred embodiment, the hinge point between the upper hinge rod 31 and the upright rod 13 is located at the connection between the upright rod 13 and the front upper rod 11. This location at the connection point improves stability. The upper fork rods 21 and lower fork rods 22 are arranged in pairs; the two upper fork rods 21 are connected by an upper fork connecting rod, and the two lower fork rods 22 are connected by a lower fork connecting rod.

[0041] In addition, an idler gear 14 is rotatably mounted on the front wheel mount 1. The idler gear 14 is located above the chainring and engages with the chain. The idler gear 14 uses an 18T gear. The idler gear 14 increases the pivot point. A high pivot point design increases chain tension when the suspension 4 compresses, resulting in noticeable pedal rebound. The idler gear 14 allows the chain to be moved closer to the pivot point, reducing chain tension and effectively mitigating pedal rebound for a smoother ride. The idler gear 14 also reduces chain elongation below the rear chainstay 22, preventing the chain from pulling on the rear derailleur guide, resulting in a smoother drivetrain. This ensures the suspension 4 does not interfere with the rear derailleur clutch, guaranteeing proper operation of the shifting system under complex riding conditions and enhancing the riding experience.

[0042] Finally, a bicycle, which includes a soft-tail frame as described above.

[0043] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A soft-tail frame characterized by, The softtail frame includes: a front wheel mounting bracket (1), a rear wheel mounting bracket (2), a linkage assembly (3), and shock absorbers (4); The front wheel mounting bracket (1) is used to connect to the front wheel of the bicycle; The rear wheel mounting bracket (2) includes an upper fork (21) bracket and a lower fork (22) bracket. The first end of the upper fork (21) bracket is used to hinge with the rear wheel of the bicycle, and the first end of the lower fork (22) bracket is hinged with the upper fork (21) bracket. The second end of the upper fork (21) frame and the second end of the lower fork (22) frame are both hinged to the front wheel mounting frame (1) through the link assembly (3). The first end of the shock absorber (4) is hinged to the front wheel mounting frame (1), and the second end of the shock absorber (4) is hinged to the link assembly (3). The rear wheel mounting frame (2) can be displaced relative to the front wheel mounting frame (1) and thus drive the shock absorber (4) through the link assembly (3).

2. The soft-tail frame as described in claim 1, characterized in that, The front wheel mounting bracket (1) includes a front upper rod (11), a front lower rod (12), and a vertical rod (13); the first end of the front upper rod (11) and the first end of the front lower rod (12) are fixedly connected, and the vertical rod (13) is used to connect the second end of the front upper rod (11) and the second end of the front lower rod (12); The upper front rod (11) and the lower front rod (12) are respectively connected to the upper fork rod (21) and the lower fork rod (22) through the connecting rod assembly (3), and the first end of the shock absorber (4) is hinged to the lower front rod (12).

3. The soft-tail frame as described in claim 2, characterized in that, The linkage assembly (3) includes: an upper hinge rod (31), a connecting plate (32), and a lower hinge rod (33); The first end of the upper hinge rod (31) is hinged to the upright rod (13), and the second end of the upper hinge rod (31) is hinged to the second end of the upper fork rod (21); The first end of the connecting plate (32) is hinged to the middle of the upper hinge rod (31), and the second end of the connecting plate (32) and the second end of the shock absorber (4) are both hinged to the first end of the lower hinge rod (33). The second end of the lower hinge rod (33) is hinged to the middle of the front lower rod (12), and the second end of the lower fork rod (22) frame is hinged to the middle of the lower hinge rod (33).

4. The soft-tail frame as described in claim 3, characterized in that, The hinge point between the upper hinge rod (31) and the upright rod (13) is located at the connection between the upright rod (13) and the front upper rod (11).

5. The soft-tail frame as described in any one of claims 1-4, characterized in that, The upper fork (21) and the lower fork (22) are arranged in pairs. The two upper fork (21) are connected by an upper fork link, and the two lower fork (22) are connected by a lower fork link.

6. The soft-tail frame as described in any one of claims 1-4, characterized in that, An idler wheel (14) is rotatably mounted on the front wheel mounting bracket (1). The idler wheel (14) is located above the chainring and is used for chain engagement.

7. The soft-tail frame as described in claim 4, characterized in that, The idler wheel (14) is a gear with 18 teeth.

8. A bicycle, characterized in that, The bicycle includes a softtail frame as described in any one of claims 1-7.

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